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HomeMy WebLinkAboutCOM 0844.000 2008-2010 • William P. Kenoi t .•. Lono A. Tyson • Mayor - =- r °?'!� Director •: '� William T. Takaba • 't ............ N. Ivan Deputy T re c tor Managing Director • - • Deputy Dire • Count aitn i f r DEPARTMENT OF ENVIRONMENTAL MANAGEMENT 25 Aupuni Street • Hilo, Hawaii 96720 <:1 (808) 961 -8083 • Fax (808) 961 -8086 (] http: / /co.hawaii.hi.us/directory /dir envmng.htm C`, • May 24, 2010 co < I p " J. Yoshimoto, Chair ,' cr- And Members of the Hawai' i County Council 25 Aupuni Street Hilo, HI 96720 Subject: Transmittal of Kilohana Sewer Improvement District — Implementation Study, Kilohana Sewer Improvements Financing Analysis Report, and Finance Department Memorandum RE: County of Hawaii Resolution No. 158-04 • Dear Chairman Yoshimoto and Council Members, In accordance with the requirements set forth in County of Hawaii Resolution 158 -04 (enclosed), the Department of Environmental Management is pleased to submit the following documents to the Hawai' i County Council: • Kilohana Sewer Improvement District - Implementation Study prepared by Engineering Solutions, Inc. dated September 2008; • Kilohana Sewer Improvements Financing Analysis prepared by Goodwin Consulting Group dated April 21, 2008; and • Kilohana Sewer Improvements Financing Analysis memo from Nancy Crawford, County of Hawaii Finance Director dated July 31, 2009. Recommendation The purpose of the Implementation Study is to: • Provide background information on the need for this project; • Identify the boundaries of the sewer improvement district; • Develop sub- basins for implementing sewer improvements; and • Provide a proposed schedule for implementing the preferred improvement alternative. The improvement district boundary shown on Exhibit 3.2 (Source: Implementation Study Report) was generated based on the study area concept established in 2004 -2005 by the Department of Environmental Management Wastewater Division. The study area encompassed approximately 250 acres and included Kahakai Elementary School and the nearby Lutheran on Church located on Lako Street in addition to the following subdivisions: O Coslot. Na �? 29 & 9 County of Hawaii is an Equal Opportunity Provider and Employer. Ref. To, y2- M v - a Ref. Pate JUN 0 9 2010 County Council Transmittal of Kilohana Sewer Improvement District — Implementation Study, Kilohana Sewer Improvements Financing Analysis Report, and Finance Department Memorandum Page 2 of 6 • Kilohana Subdivision; • Ali'i Kai Subdivision; • Kamani Tree Subdivision; • Kalani Makai Subdivision; and • Komohana Kai Subdivision. The Implementation Study considered various wastewater treatment and disposal options for parcels located within the study area. Based upon existing lot sizes and percentage of developed Tots, a centralized wastewater collection system that connects the study area to the existing County sewer system was recommended as the preferred option. The centralized collection system would include gravity sewer lines, pump stations and force mains and low pressure sewers with a grinder pump application for certain areas. The Financing Analysis considered various public infrastructure funding mechanisms including an improvement district (ID), community facilities district (CFD) and tax increment district (TID). The Financing Analysis noted that each of these mechanisms involves different implementation procedures, protest requirements, authorized facilities, revenue sources and security requirements. The Financing Analysis identified that an ID and a CFD share the following positive attributes: c • Ability to fund all of the needed improvements in the Kilohana Implementation Study; • Both can be formed without a majority protest; • IDs and CFDs require a minimum value -to -lien ration of 3 -to -1; and • ID bonds and CFD bonds are non - recourse to the County so the County's general fund is not at risk. The Financing Analysis noted that the limitation of an ID compared to the flexibilities of a CFD justify the formation of a CFD as the preferred funding tool. Although the Financing Analysis recommended the formation of a CFD, our department, in consultation with the County of Hawai'i Department of Finance, feels that neither an ID nor CFD for the study area is likely to be accepted by the community at this time. Although the study area is within the one -mile shoreline area identified in the Kona Community Development Plan as including lots which should be connected to the County sewer system, there is minimal motivation for those outside of the Kilohana Subdivision to form the district and pay for the sewer improvements. It should be noted that Hawai'i County Code (HCC) Section 21 -14 requires that a sewer lateral be installed to all properties adjacent to the Public sewer, thereby making these properties "accessible ". HCC Section 21 -5(a) requires that properties that are "accessible" to the Public sewer be connected to the sewer at the property owner's expense. As a new sewer extension will make many properties accessible to the Public sewer, it is unlikely that these property owners outside of the Kilohana Subdivision, will support the implantation of an ID or CFD. County of Hawai' i is an Equal Opportunity Provider and Employer. County Council Transmittal of Kilohana Sewer Improvement District — Implementation Study, Kilohana Sewer Improvements Financing Analysis Report, and Finance Department Memorandum Page 3 of 6 Findings The findings of the Implementation Study are summarized below (following the requirements in Hawai'i County Code Section 12- 10(a)) to describe the manner and cost to sewer the study area. • Preliminary data concerning the special improvements proposed to be constructed: The amount of wastewater flows was based on the per capita wastewater established in the City and County of Honolulu Design Standards of the Department of Wastewater Management (herein referred to as the "design standards ") since the County of Hawai`1 currently references these standards for design works. The flow rate from homes is the product of the number of homes, average daily per capita flow of 80 gallons per day and the population density of 4 persons per single family home. The flow rate from schools is the product of the number of persons and the average daily per capita flow of 25 gallons per day. Table 1 summarizes the estimated future Design Average Flow and Design Peak Flows for the various locations in the study area. • The general character and extent of any improvement to be proposed: The Implementation Study examined three alternatives to replace the large capacity cesspools and other existing (single - family) cesspools located in the study area: o Alternative 1 — Connection to the County sewer system through provision of a central wastewater collection system that will connect to the existing County sewer along Ali'i Drive; o Alternative 2 — Installation of an individual wastewater system (i.e. septic tank with Leach field) on each lot; and o Alternative 3 — Installation of a septic tank or other treatment system upstream of the cesspool and conversion of the large capacity cesspool into a seepage pit. The Implementation Study noted that in consideration to the sizes of existing home lots, and since homes have already been built on almost all lots within the study area, alternatives 2 and 3 are not practical. The Implementation Study noted that open land area on each of the lots may not be adequate for installation of new /additional equipment and that each property owner with individual wastewater systems will be required to provide long -term maintenance of these systems and will be subject to regulatory monitoring, testing and reporting to the State of Hawaii Department of Health (DOH). The central wastewater collection system is a network of pipes that conveys wastewater from its point of origin to a central treatment and disposal location. The Implementation Study describes a system that collects flows from all homes and conveys it downhill to the intersection of Ali'i Drive and Royal Poinciana Drive where it will connect to the existing County sewer system. The existing County sewer system conveys flows from this area to the County's Kealakehe Wastewater Treatment Plant for final treatment and disposal. Due to the prevailing terrain, the centralized wastewater collection system is anticipated to include one or all of the following system components: County of Hawaii is an Equal Opportunity Provider and Employer. County Council Transmittal of Kilohana Sewer Improvement District — Implementation Study, Kilohana Sewer Improvements Financing Analysis Report, and Finance Department Memorandum Page 4 of 6 o Gravity sewers; o Pump stations and force mains; and o Low pressure sewers. Provision of a centralized wastewater collection system will require the construction of a new underground wastewater collection system typically in or through existing roads or easements. To overcome areas of flat or hilly terrain, pressurized lines (including pump station and force mains and/or installation of low pressure sewers) may need to be included in the centralized wastewater collection system. Table 2 summarizes information from the Implementation Study on the main advantages and disadvantages of connecting to an existing regional wastewater system. • Whether any new land will be necessary to be acquired and the estimated cost thereof and the proportion of the cost which should be borne by the County: Except as noted below, the proposed Kilohana Subdivision sewer works will be constructed within existing County right -of -way and within sewer easements that reside on private properties where necessary. Except as noted below, maintenance of improvements or existing sewer works located on private property will be the responsibility of the respective property owners and/or homeowners association(s) and is not included as part of the County sewer system. An easement along State -owned street section within the Ali'i Kai Subdivision to Ali'i Drive for a portion of the main wastewater collection line would be necessary but at no anticipated acquisition cost. All other lands for the Kilohana Subdivision main collection system are planned to be routed within existing County right -of -way. The existing Kilohana Subdivision main collection system would be subject to inspection prior to acceptance by the County. Existing sewer easements, where applicable, would be conveyed to the County for maintenance access purposes. • The materials recommended to meet the conditions of the improvement: In accordance with the design standards, the recommended construction materials will include PVC pipe for gravity sewers and force mains. Material requirements are typically specified in details during the design stage. • The boundaries of the proposed improvement district and any sub - districts or zones therein as to which different portions of the cost of improvements should be charged: The improvement district boundary shown on Exhibit 3.2 was based on the study area established by the County with the intent of addressing Resolution No. 158 -04 ( "certain real property located at Holualoa, District of North Kona "). • The estimated cost of the improvement, the portions of the cost to be borne by the County and the portions of the cost to be assessed against the assessment units specially benefited with the maximum unit of assessment to be made against each assessment unit to be assessed: County of nawai'i is an Equal Opportunity Provider and Employer. County Council Transmittal of Kilohana Sewer Improvement District — Implementation Study, Kilohana Sewer Improvements Financing Analysis Report, and Finance Department Memorandum Page 5 of 6 Table 3 shows the total estimated construction costs for sewer improvements within the improvement district boundary is $8,510,000 (2006 dollars). This cost covers installation of gravity sewers, low- pressure sewers and sewer laterals in the County right -of -way up to property lines (see Tables 4 through 8 for sewer improvement costs estimated for the other subdivisions). It should be noted that the sewer improvement costs depicted in Tables 3 through 8 do not consider closure of existing single - family and Large capacity cesspools, pump stations, grinder pump systems on residential properties, reconstruction of selected existing sewers within privately -owned utility easements and connection of the church and school. The Implementation Study assumed these costs were to be borne by respective property owners. The Financing Analysis Report by Goodwin Consultants determined that a Community Facilities District (CFD) was the ideal method of financing over an Improvement District (ID). The boundaries of the Kilohana CFD were assumed to correspond to the improvement district boundary in Exhibit 3.2 excepting the Kahakai Elementary School and Lutheran Church. The CFD analysis used the estimated construction costs in Table 3 which were inflated to 2007 dollars by applying a 3% annual inflation rate. The CFD analysis also included costs for closure of existing single - family and large capacity cesspools, pump stations, grinder pump systems on residential properties and associated design costs resulting in a complete sewer system facility for the community. In order to spread the costs in a manner that accommodated a variety of housing types in the area, the following critical assumptions were made: 1. Under County's direction, the CFD analysis included two scenarios: Scenario 1 assumes all of the facilities ($16.9 million) are funded through the Kilohana CFD while Scenario 2 assumes the County will contribute $1.5 million to pay for a portion of these facilities, reducing the total amount that must be funded through the Kilohana CFD to $15.4 million. 2. The CFD - financed costs are delineated between Kilohana costs and non - Kilohana costs under Scenarios 1 and 2. Kilohana costs are allocated to the Kilohana Subdivision only while non - Kilohana costs are allocated to the remaining subdivision (i.e., Ali'i Kai, Kamani Tree, Komohana Kai, and Kalani Makai). This resulted in a generation of four (4) preliminary special tax rates (assumes special taxes increase of 2% per year) under each scenario: Scenario 1: Kilohana w /Grinder Pump: $3,030 Kilohana w/o Grinder Pump: $2,450 Non - Kilohana w/ Grinder Pump: $2,320 Non - Kilohana w/o Grinder Pump: $1,730 Scenario 2: Kilohana w /Grinder Pump: $2,980 Kilohana w/o Grinder Pump: $2,410 Non - Kilohana w/ Grinder Pump: $2,080 Non - Kilohana w/o Grinder Pump: $1,560 County of Hawaii is an Equal Opportunity Provider and Employer County Council Transmittal of Kilohana Sewer Improvement District — Implementation Study, Kilohana Sewer Improvements Financing Analysis Report, and Finance Department Memorandum Page 6 of 6 Based on the information provided herein, we recommend that no further action occur at this time. Should you have any questions or require additional information, please contact the Department's Wastewater Division Chief, Ms. Dora Beck, at 961 -8513. Best Regards and Aloha, Approved: 44 (.2aL (o Lono A. Tyson I William P. Kenoi DIRECTOR MAYOR ENCLOSURES: Resolution 158 -04 1) Kilohana Sewer Improvement District - Implementation Study prepared by Engineering Solutions, Inc. dated September 2008 2) Kilohana Sewer Improvements Financing Analysis prepared by Goodwin Consulting Group dated April 21, 2008 3) Kilohana Sewer Improvements Financing Analysis memo from Nancy Crawford, County of Hawai' i Finance Director dated July 31, 2009 List of Exhibits and Tables: Exhibit 3.2: Improvement District Map Table 1: Summary - Wastewater Flows Table 2: Main Advantages and Disadvantages of the Preferred Alternative Table 3: Summary: Probable Construction Cost (County Portion Only) Table 4: Estimate of Probable Cost of Construction: Main Collection System Table 5: Estimate of Probable Cost of Construction: Sub -Basin 1 — Kilohana & Kalani Makai Table 6: Estimate of Probable Cost of Construction: Sub -Basin 2 — Ali' i Kai Table 7: Estimate of Probable Cost of Construction: Sub —Basin 3 — Kamani Tree Table 8: Estimate of Probable Cost of Construction: Sub — Basin 4 — Komohana Kai cc: William Kenoi, Mayor Nancy Crawford, Finance Director Dora Beck, P.E., WWD Chief County of Hawaii is an Equal Opportunity Provider and Employer. COUNTY OF HAWAII STATE OF HAWAII RESOLUTION NO. 158 04 A RESOLUTION RELATING TO A COUNCIL INITIATED IMPROVEMENT DISTRICT IMPLEMENTATION STUDY FOR THE CONSTRUCTION OF CERTAIN WASTEWATER AND SEWER SYSTEM IMPROVEMENTS FOR HOLUALOA, DISTRICT OF NORTH KONA, HAWAII WHEREAS, the Council of the County of Hawaii wishes to initiate proposed improvements on certain real property located at Holualoa, District of North Kona, County and State of Hawai'i for improvements consisting of an extension to the municipal sewer system, pursuant to the provisions of Section 12 -10, Hawai'i County Code, as amended; and WHEREAS, the US Environmental Protection Agency (EPA) has promulgated Underground Injection Control regulations on December 7, 1999 which require that large capacity cesspools existing prior to that date must be upgraded or closed by April 5, 2005; and WHEREAS, the "Sewer Policies" outlined in the General Plan states, in part: • "Private systems shall be installed by land developers for major resort and other developments along shorelines and sensitive higher inland areas, except where connection to nearby treatment facilities is feasible and compatible with the County's long -range plans, and in conformance with state and county requirements. • The County shall take immediate steps to designate treatment plant sites, sewerage pump station sites, and sewer easements according to the facility plans to facilitate their acquisition. • The County shall seek State and Federal funds to assist in financing the construction of proposed sewer systems." and WHEREAS, in its assessment of the projected sewage flow for the Kealakehe Wastewater Treatment Plant, the "Kailua -Kona Facility Plan Southern Zone" prepared for the County of Hawai'i Department of Public Works dated November 1981 identified the area generally makai of Kuakini Highway between Kailua and Keauhou as the planning subarea for population projections; and WHEREAS, the Kilohana Homeowners Association has requested the assistance of the County in its efforts to comply with the EPA regulation and connect to the County sewer system; and WHEREAS, the Council of the County of Hawai'i acknowledges the need to implement improvements consisting of an extension to the municipal sewer system on certain real property located at Holualoa, District of North Kona, County and State of Hawai'i; and WHEREAS, extension of said improvements will include, but not be limited to, necessary gravity sewers, manholes, and sewer laterals with cleanouts to be installed to each property serviced by the proposed improvements; and WHEREAS, the Council finds that a number of options may be chosen for the allocation of costs of sewer system improvements, including, but not limited to: distribution of sewer improvement district costs by parcel, allocation by zoning or permissible number of units assigned to each parcel, potential usage, required sewer capacity, square footage of buildings, benefits conferred upon the land, or a combination thereof; and WHEREAS, the allocation of costs associated with said improvements and the preferred financing thereof may best be determined after the scope and timetable(s) of intended development, including incremental development, of all affected landowners are surveyed, and all landowners are consulted within a regional planning process. NOW, THEREFORE, BE IT RESOLVED BY THE COUNCIL OF THE COUNTY OF HAWAII that: (1) in consultation with the landowners referenced above, the Director of the Environmental Management is directed to prepare for submission to the Council a specific and detailed implementation plan for an improvement district to include the necessity, feasibility, proposed boundaries, proposed real properties subject to assessment, estimated total cost, and method of financing desirable for the aforementioned sewer system; and (2) include in the specific and detailed implementation plan all such data, survey, maps, plans, drawings, details and specifications for the improvements and any other matters or details intended to apply thereto in accordance with the provisions of Section 12 -10, Hawaii County Code, as amended; and (3) advise the Council as to the preferred method of financing said improvements, whether by Council- initiated improvement district, owner - initiated improvement district, tax increment district, or private financing. • BE IT FURTHER RESOLVED that the Clerk of the County of Hawaii transmit copies of this resolution to the directors of the Departments of Finance and Environmental Management, and the Environmental Management Commission. Dated at Hilo , this 5th day of March , 2004. Introdu By: • Council Member, County of aw COUNTY COUNCIL ROLL CALL VOTE County of Hawai`i AYES NOES ABS EX Hilo, Hawai`i pRAKAKI X CHUNG X I hereby certify that the foregoing RESOLUTION was by ELARIONOFF X The vote indicated to the right hereof adopted by the COUNCIL of the HOLSCHUH X County ofHawai'ion March 5, 2004 JACOBSON X REYNOLDS X ATTEST: %J��'. SAFARIK X — TULANG X E a TYLER X 8 0 0 • Reference: • C- 503/FC COUNTY CLERK CHAIRMAN & PRESIDING OFFICER RESOLUTION NO. 158 04 1 WASTEWATER DIVISION DEPARTMENT OF ENVIRONMENTAL MANAGEMENT COUNTY OF HAWAII KILOHANA SEWER IMPROVEMENT DISTRICT Kona, Hawaii ' j TMK: 7 -6 -16, 18, 19, 20, 22, 23, and 24, 7 -7 -04, 21 1 ' IMPLEMENTATION STUDY Final Submittal .1 I 1 _ 1 I' Prepared by: ' Engineering Solutions, Inc. 98 -1268 Kaahumanu Street, Suite C -7 Pearl City, Hawaii 96782 -' September 2008 1 1 I 1 ri WASTEWATER DIVISION DEPARTMENT OF ENVIRONMENTAL MANAGEMENT COUNTY OF HAWAII ( 1 KILOHANA SEWER IMPROVEMENT DISTRICT Kona, Hawaii TMK: 7 -6 -16, 18, 19, 20, 22, 23, and 24, 7 -7 -04, 21 [1 1 IMPLEMENTATION STUDY I Final Submittal 1 1 1 +..' Prepared by: • I , Engineering Solutions, Inc. 98 -1268 Kaahumanu Street, Suite C -7 Pearl City, Hawaii 96782 it 1 September 2008 1 I I' TABLE OF CONTENTS I1 PAGE Table of Contents i 1 I List of Exhibits iii I I List of Tables iii Executive Summary ES -1 I' 1 Authorization and Purpose 1 -1 2 Project Justification 2 -1 I 1 3 IMPROVEMENT DISTRICT 3 -1 II 4 Background 4 -1 4.1 Topography and Soil Conditions 4 -1 4.1.1 General Topography 4 -1 I� 4.1.2 Soils 4 -1 4.2 Flood Zones 4 -1 4.3 Existing Utilities 4 -5 4.3.1 Wastewater System 4 -5 I' 4.3.2 Drainage 4 -8 4.3.3 Water 4 -8 4.3.4 Electrical/Telephone /Cable Television /Street Lights 4 -8 (I 4.4 Historical Sites 4 -11 II 4.5 Roadways 4 -11 I' 5 Wastewater Collection System Alternatives 5 -1 5.1 Regulatory Requirements 5 -2 5.1.1 County of Hawaii 5 -2 `,' 5.1.2 State of Hawaii DOH 5 -3 1 5.2 Central Collection System Components 5 -3 5.2.1 Gravity Sewers 5 -3 li 5.2.2 Pump Stations and Force Mains 5 -3 5.2.3 Low Pressure Sewers 5 -5 6 Design Criteria 6 -1 II 6.1 Wastewater Flow Projections 6 -1 6.1.1 Design Average Wastewater Flow, Q 6 -1 6.1.2 Design Peak Flow, Q 6 -1 I 6.1.3 Summary - Improvement District Flow Projections 6 -2 6.2 Gravity Sewer Design Considerations 6 -2 6.2.1 Line Sizing 6 -2 I I 6.2.2 Minimum Cover Over Sewer Lines 6 -3 6.2.3 Manhole Spacing 6 -3 6.3 Pump Station and Force Main Considerations 6 -3 II Kilohana Sewer Improvement District i Implementation Study 11 September 2008 11 j 1 6.3.1 Wet Well Sizing 6 -3 6.3.2 Force Main Sizing: 6 -3 I 6.3.3 Minimum Cover Over Pipes 6 -3 7 Improvement District Sub - basins 7 -1 I 7.1 Main Collection System 7 -1 7.2 Sub -Basin 1 (Kilohana and Kalani Makai Subdivisions) 7 -3 7.3 Sub -Basin 2 (Alii Kai Subdivision) 7 -3 7.4 Sub -Basin 3 (Kamani Tree Subdivision) 7 -6 1 7.5 Sub -Basin 4 (Komohana Kai Subdivision) 7 -6 8 Estimated Construction Costs 8 -1 + I J 1 9 Preliminary Implementation Schedule 9 -1 10 Summary 10 -1 ' 11 References 11 -1 I ,' Appendices 111 A Background Documentation Appendix B Hydraulic Calculations Appendix C Construction Cost Estimates 11 1 11 11 l.1 1 II 1 I Kilohana Sewer Improvement District ii Implementation Study 1 September 2008 I1 i' LIST OF EXHIBITS I' Exhibit No. Title Page 3.1 Vicinity Map 3 -2 ' 3.2 Improvement District Map 3 -3 4.1 Topographic Map 4 -2 11 4. 2 Soil Survey Map 4 -3 4.3 Flood Insurance Rate Map 4 -4 4.4 Parcels Services by Large Capacity Cesspools 4 -6 I 1 4.5 Kilohana Subdivision Existing Wastewater Collection System 4 -7 4.6 Holualoa Stream 4 -9 I 1 4.7 Roadway Jurisdictions and Proposed Future Roads 4 -12 5.1 Typical Profile — Gravity Sewer 5 -4 I1 5.2 Typical Pump Station and Force Main (Profile View) 5 -6 5.3 Low Pressure Sewer 5 -7 1 I 5.4 Sample — Ginder Pump (Section View) 5 -8 7.1 Main Collection System 7 -2 I, 7.2 Sub -Basin 1 7 -4 7.3 Sub -Basin 2 7 -5 I' 7.4 Sub -Basin 3 7 -7 7.5 Sub -Basin 4 7 -8 I .I LIST OF TABLES r 1 Figure No. Title page � 4.1 Roadway Data 4 -10 11 6.1 Summary: Wastewater Flows (MGD) 6 -2 8.1 Summary: Probable Construction Cost 8 -1 8.2 Summary: Non - County Sewer Improvements 8 -2 1.� 9.1 Implementation Schedule 9.1 II I L Kilohana Sewer Improvement District iii Implementation Study I ' September 2008 i1 11 EXECUTIVE SUMMARY PURPOSE AND JUSTIFICATION 11 Revisions to the Class V Underground Injection Control (UIC) regulations were adopted by the U.S. Environmental Protection Agency (EPA) on December 7, 1999 (40 CFR Parts 9, 144, 145 and 146). These revised regulations banned the installation of new large capacity cesspools after April 2000 and required closure of existing cesspools within five years (April 2005) was adopted. In an effort to comply with these regulations and phase out the eight existing large capacity cesspools (LCCs) in their subdivision, the Kilohana Subdivision Home Owners' Association submitted a letter to the County of Hawaii (County) requesting that the County's wastewater collection system be extended to their subdivision. In response to this request, and to also address elimination of other LCCs in proximity to the Kilohana Subdivision, the County Council passed a resolution in 2005 to conduct an implementation study for this portion of Holualoa. I 1 The purpose of this report is to: 1 • Provide background information on the need for this project. ! 1 • Identify the boundaries of the sewer improvement district. • Develop sub - basins for implementing sewer improvements. 11 • Provide a proposed schedule for implementing the preferred improvement 1 . alternative. 11 Possible financing mechanisms for wastewater system improvements proposed in the report are addressed in a companion report to this study prepared by Goodwin Consultants. For reference purposes, a copy of the Goodwin Consultants' report is available, under separate cover. The scope of this study did not include detailed ground topographic survey, site - specific archaeological survey, or assessment of the existing County collection system or wastewater treatment facilities — to determine whether there is adequate capacity to accommodate 'l f improvement district (ID) flows. The configuration of sewer system improvements was developed based on available subdivision plans, Hawaii County property tax information, Department of Health records, engineers' site observations, and other available reference i information. The recommendations presented in this report are subject to verification during the design phase — using site specific data. 1 IMPROVEMENT DISTRICT LIMITS The existing County sewer collection system (gravity sewer lines and pump stations and force mains) parallels the shoreline, along Alii Drive. This existing County collection system is located downhill (makai) of the Kilohana Subdivision. To eliminate the existing LCCs in the ID, a new wastewater collection system is needed to service the Kilohana Subdivision and other existing 1 subdivisions in its proximity. Ultimately, this collection system will connect to the existing County system along Alii Drive. LI Kilohana Sewer Improvement District ES - Implementation Study September 2008 11 Based on discussion with the County of Hawaii, Wastewater Division personnel during the project scoping meetings and based upon assessment of the prevailing terrain in this area, the following subdivisions have been included in the ID: 1'1 o Kilohana Subdivision 11 o Alii Kai Subdivision o Kamani Tree Subdivision I ,1 o Kalani Makai Subdivision ( o Komohana Kai Subdivisions 1 Kahakai Elementary School and the Lutheran Church were also included in the ID. In total, the f overall ID encompassed approximately 250 acres. 11 Improvements proposed for this ID have been divided into the main collection system (located along Royal Poinciana Drive and Kupuna Street) and four sub - basins. The sub - basins include: 1) Kilohana and Kalani Makai Subdivisions, 2) Alii Kai Subdivision, 3) Kamani Tree Subdivision, and 4) Komohana Kai Subdivision. 11 SYSTEM LAYOUT Consideration was given to several wastewater treatment and disposal options for parcels within 11 the ID. After evaluating these alternatives, particularly with consideration to the limited availability of open space within the ID to execute some of these alternatives and the prevailing terrain, providing a centralized collection system that connects to the existing County system 11 was recommended. With consideration to the existing ID terrain, the system primarily includes gravity sewer lines. In areas where it was not feasible to provide service by gravity sewers (i.e., low elevations or 11 hilly terrain), use force mains and /or low- pressure sewers and /or individual grinder pumps installed for each applicable home was recommended. Provision of County owned central pump stations was kept to a minimum due to the limited availability of available open land area 11 for this type of installation. Since only general topographic information in combination with available record drawings were used to develop the recommended collection system configuration, the specifics regarding the system layout is subject to confirmation during the design phase. Detailed topographic information provided for the design phase will may make it possible refine the collection system configuration -- possibly to further minimize the need for force mains and /or low pressure 11 sewers. Minimizing pumping in the system will help keep future recurring power costs to a minimum. LI CONSTRUCTION PHASING 11 It is recommended that the construction of the ID collection system be constructed in five phases. Briefly summarized: I/ Kilohana Sewer Improvement District ES - Implementation Study 11 September 2008 11 • Phase 1: Includes the construction of the main collection line (running along Kupuna Street and Royal Poinciana Drive). This provides the backbone (or main trunk line) to which all 1 i' other sub - basins will connect. This also provides the connection required to convey flows from the upper portion of the ID down to the existing County system located along Alii Drive. This will eliminate two of the existing eight LCCs in the Kilohana Subdivsion. j' • Phase 2: With the main trunk line in place, areas identified as part of Sub -Basin 1 will be added. Work in this phase will connect of the remaining portions of Kilohana Subdivision, (' Kahakai Elementary School, and Kalani Makai Subdivision to the central system. This will remaining known LCCs in ID. 1 • Phase 3: Includes servicing Sub -Basin 2. This will complete service to the remaining portion of the Alii Kai Subdivision. • Phase 4: Includes servicing Sub -Basin 3. This will provide service to the Kamani Tree (' Subdivision. ii • Phase 5: This final phase will service Sub -Basin 4 — the Komohana Kai Subdivision and the Lutheran Church site. (( CONSTRUCTION SCHEDULING J, If construction is completed in consecutive phases, it is estimated that completion of the recommended system can be completed in approximately three years. 1 1 The estimated construction phasing for construction of proposed County system improvements is as follows: 1 - Phase 1: 9 months Phase 2: 6 months - Phase 3: 6 months Phase 4: 6 months q_ - Phase 5: 9 months This estimate does not include non - County system improvements (to be undertaken by � individual home owners, home owners' associations, and /or the State of Hawaii Department of Education). 11 PROBABLE CONSTRUCTION COST r The total probable construction cost for the County improvements within the ID is estimated at 1 1 about $8,510,000 (in 2006 dollars). This includes the cost for providing laterals from the proposed lines to the property lines of each parcel. To provide complete wastewater collection service to the ID, additional improvements will be required for non - County areas. These include installation of a new sewer laterals from each home the property line; closure and backfilling all existing cesspools; installation of individual 1 1 residential low- pressure grinder pump units and pressurized lateral for selected parcels (where t gravity flow is not feasible); reconstruction of selected existing sewers privately owned utility Kilohana Sewer Improvement District ES - Implementation Study September 2008 1_, 1 1' easements (Kilohana Subdivision); and connecting the church and school sites. Costs associated with these improvements will be borne by respective property owners. i l The total probable construction cost for these non - County improvements could range from about $6,800 per house (for the installation of a new sewer lateral and closure of the existing JJ r l cesspool) to about $30,000 per home (if a grinder pump unit is required and including closure of the existing cesspool). Additional cost for homes requiring grinder pumps may be necessary if a low pressure sewer in a privately owned street is required. f' The cost for sewer systems and pump stations within privately owned easements (i.e., located in easements behind privately owned lots or in private roadways in the Kilohana Subdivision) are also not included. The Kilohana Homeowner's Association will be responsible for these 4 1 costs, in addition to the cost for abandoning the eight existing LCCs. �' [1 1 -' 11 11 1 ., 1.1 I I C1 11 1 I ' Kilohana Sewer Improvement District ES -4 Implementation Study . September 2008 1 ! , 1 AUTHORIZATION AND PURPOSE On December 7, 1999, the EPA adopted revised regulations for Class V injection wells. These revised regulations banned the installation of new LCCs after April 2000 and required closure of existing LCCs within five years (April 5, 2005). See Appendix A for copy of revised Regulations. To comply with these regulations and eliminate the eight existing LCCs in their subdivision, the 1, Kilohana Subdivision Home Owners' Association submitted a letter to the County requesting that they consider extending their existing County wastewater collection to the Kilohana Subdivision. In response to this request, and to address elimination of other possible LCCs in �' proximity to the Kilohana Subdivision, the County Council passed a resolution to conduct an implementation study for this portion of Holualoa. This resolution was passed in 2005. (Refer to Appendix A for copies of these reference documents.) L The County contracted the services of Engineering Solutions, Inc. (ESI) to go forward with the implementation study for the potential Kilohana Sewer Improvement District. As described in the project scope of work and discussed with the County at project kick -off meeting for this report, the purpose of this report is to: i 1 • Provide background information on the need for this project. (, • Identify the boundaries of the sewer improvement district. f • Develop phasing for implementing wastewater system improvements. II • Provide a proposed schedule for implementing the preferred improvement alternative. I I Original discussions regarding the scope of work for this report included identification of potential financing mechanisms for the proposed improvements. This was removed from the scope for this report in 2006, when Goodwin Consultants was contracted separately by the I 1 County to provide this assessment. A copy of this companion report is available under separate cover. 1 .1 The scope of this study did not include performing a detailed ground topographic survey, geotechnical analysis, or site - specific archaeological survey. For this study, recommendations were developed based on available record drawings and reference materials, government agency records, and engineers' field observations. The scope of this study was limited to 1.1 providing recommendations for possible wastewater system improvements within the ID. Assessment of available capacity in the existing County collection system or wastewater treatment facilities was not included. ll (1 I ' Kilohana Sewer Improvement District 1 -1 Implementation Study ( September 2008 1.; (1 r1 2 PROJECT JUSTIFICATION The purpose of the revised regulations for UIC Class V Wells is to prevent contamination of ( 1 1 underground sources of drinking water by limiting the injection of wastes through Class V wells — this includes LCCs. ' 1 A cesspool is a lined or unlined hole in the ground that receives untreated sanitary waste (wastewater). Wastewater seeps from the cesspool into the surrounding soil without the benefit of treatment. A LCC is a cesspool that receives sanitary waste from multiple dwellings (e.g., (1 duplexes, "ohana" homes, etc.), or community or regional establishments (e.g., churches, public park restrooms, etc.) that serve 20 or more people per day or receives more than 1,000 gallons of wastewater per day. LCCs are the only type of cesspool banned by the revised EPA (1 1 regulations due to the higher volume of wastewater that they handle (as compared individual cesspools). Discharges from cesspools (whether they are LCCs or not) are a potential public health and ll environmental concern since they allow untreated wastewater to percolate directly into the soil and possibly into the groundwater. Since wastewater is discharged without treatment, there is a potential that disease - causing pathogens and other contaminants, such as nitrate, can be released into the ground and into the groundwater. Once the groundwater is contaminated, drinking water wells and water quality in streams and coastline areas could be adversely affected. It is noted that a large percentage of wastewater generated by homes, businesses, 1 and community buildings located along the Kona coast of the island are still disposed through individual wastewater systems — primarily either individual cesspools (each servicing one dwelling unit) or into LCCs. I.1 The 1999 regulation also established a timeline for elimination of the LCCs. This included: 1) banning installation of any new cesspools nationwide as of April 5, 2000, and 2) closure of 11 existing cesspools by April 5, 2005. The requirement to upgrade or close existing LCCs is the driving regulatory factor behind this assessment report. In 2003, in their effort to comply with the LCC elimination requirement, the Kilohaha Subdivision 1 Home Owners' Association submitted a letter to the County requesting that the County consider ( extending the existing County wastewater collection system from Alii Drive up to their subdivision. (See Appendix A for copy of Kilohaha Subdivision Home Owners' Association 11 request letter.) The subdivision is already partially sewered and the wastewater is disposed into eight existing LCCs. In proximity to the Kilohana Subdivision, other known LCCs are located in the Kalani Makai Subdivision, the Kahakai Elementary School, and at the Lutheran Church. These LCCs need to must be eliminated in compliance with current EPA regulations. 11 In 2004, the County Council passed Resolution No. 158 -04 to Y P provide funding for an implementation study for the construction of wastewater collection system for the'Holualoa area — which includes the Kilohana ID. (See Appendix A for a copy of the County resolution.) It is further noted that the July 2001 County sewerage service map shows that the areas in proximity to Royal Poinciana Drive and Kupuna Street were planned to be added to the County wastewater system within 10 years. (See Appendix A for copy of the County's 2001 sewerage service map.) 11 �1 Kilohana Sewer Improvement District 2 - Implementation Study �1 September 2008 • I1 (1 3 IMPROVEMENT DISTRICT 11 The Holualoa area of Hawaii, which includes the Kilohana Subdivision, is located on the west side of the island of Hawaii, approximately four miles south of downtown Kailua -Kona. Royal Poinciana Drive and Kupuna Street are the two roads traversing through ID that link Alii Drive and Kuakini Highway. Alii Drive is a two -lane road that parallels the shoreline located to the southwest of the Kilohana Subdivision. Kuakini Highway also parallels the shoreline. It is a � newer multi -laned roadway and is located along the northeast boundary of the Kilohana Subdivision. [1 In addition to the Kilohana Subdivision, other subdivisions and areas of interest located in proximity to Royal Poinciana Drive and Kupuna Street include the Alii Kai, Kamani Tree, Komohana Kai, and Kalani Makai subdivisions; Kahakai Elementary School; the Lutheran f ' Church; and a few parcels located along the lower portions of Royal Poinciana Drive are included in the ID. In total, the ID encompasses approximately 250 acres. (See Exhibits 3.1 and 3.2 for vicinity and ID maps, respectively.) /- , Parcels within the Kilohana, Komohana Kai, and Alii Kai Subdivisions are typically single - family home lots (one home per parcel). Parcels within the Kalani Makai and Kamani Tree ( Subdivisions are typically "ohana" lots, with two homes on each parcel. I. 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WI - E I, "„_ is,. ti^ - jig eNh .r ^�'N Mf Ii `YIvKl.'� 'C,.Nt,N 5 • In L =Ls mw � ���Yr r +r ,, ti rota Sv 7 ll SC, l d 11111 IM ail % lir ilk ♦ . 1 . IN.___, la N ma saw. I a --------- ---3 CZ 351A3 . " c a. ea" MN ".. _ j. i ,. 1 11 4 BACKGROUND { 1 4.1 Topography and Soil Conditions A site - specific detailed ground topographic survey and geotechnical study were not conducted 1. 1 for this report. The following generalized characteristics of the study were summarized based on available record drawings and reports. 4.1.1 General Topography 1 The ID is located at the base of Mauna Loa and slopes uphill from an elevation of about 13 feet along Alii Drive at the west boundary of the site, to an elevation of about 310 feet along Kuakini I.1 Highway at the east boundary of the site (see Exhibit 4.1). [Reference No. 16] 4.1.2 Soils (1 The generalized soils maps indicate that, the soils in the area are classified as Punaluu extremely rocky peat, 6 to 20 percent slope (rPYD), Kaimu extremely stony peat, 6 to 20 percent slopes (rKED), and Waiaha extremely stony silt loam, 6 to 12 percent (WHC). See r I I Figure 4.2 for soils map information. [Reference No. 14] rPYD soils make up over 75 percent of the land area within the project area. These soils L 1 consist of well drained, organic soils over pahoehoe lava bedrock. The organic soils are primarily composed of peat, which is rapidly permeable. The Pahoehoe lava bedrock is very slowly permeable. rKED soils is found along the south side of the Komohana Kai subdivision. These soils consist of extremely stony peat underlain by fragmented Aa lava. These soils are rapidly permeable. LI WHC soil is found along the Kamani Tree Subdivision and the south side of the Alii Kai Subdivision, along the south side of Royal Poinciana Drive. These soils consist of shallow, well - drained extremely stony silty loam and are moderately permeable. The underlying soil is also 1 _1 pahoehoe lava bedrock. 4.2 Flood Zones I The Hood Insurance Rate Map (FIRM) for the ID (Community Panel 155166 0926 E, Revised June 2, 1995) indicates that a large portion of the ID is located in Flood Zone X — areas i determined to be outside of the 500 -year flood plain. The FIRM also identifies four existing i. drainageways traverse through the project area. (See Exhibit 4.3 for FIRM information and locations of the drainageways identified in the following paragraphs.) 1 The four drainageways located in the ID include the following. • Drainageway 1 is the southern most drainageway, located on the south side of the ID, crossing Lako Street. This drainageway is shown as a Zone A special flood hazard area inundated by 100 -year flood — no base flood elevation determined. • Drainageways 2 and 3 are the center two drainageways flowing from below Kuakini Highway, with Drainageway 3 converging into Drainageway 2 just above the crossing at Kupuna Street. The Drainageway 2 terminates at the shoreline. Drainageway 2 is known Kilohana Sewer Improvement District 4 - Implementation Study September 2008 (1 • PrtilleIrkaSallf -.I I f 1 m c‘4 8 cr * in m Few*. i 1 , , \ .., a „, , L., Li 'PP Li II sliseptt sit :- ) \ pug- • Sift . .��► s. / , / w 1 -; „ L u v ) . 2 D ° - 1 - 4 -- . vILL' _,,, ,,,,, E _ o _ = �u I ry� r �i arts* i l ' L s 1 I o v c,w X 0 U sm. at of altiarat 1,1,/ 'JO "WS" i f ' , W 5 Y c I . 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N � W lam-- II MIME � -,„te) pli t icoc i rogais at 2ad ila we n lei . --- — ins- 1-- --- ® h eir t h' � .a b �� I�� a - Itc-i an / O �A�� • ■� �IIIIII iiiii 1 1111 1 �� WO Ile \`11 700H�S amps: • ii- �� . IVX VIIVX 1110 1 �� . \tatat Ill • a a MS zL 1111111sin3a , o dIrv3fI0001 : 331_ L____. L_____ L__-: L -J L._.J i______; L.._� L_J :__J L___■ __._J :_ i _ i i_ 1 as the Holualoa Stream. The FIRM identifies these drainageways as Zone AE Special Flood Hazard Area Inundated by 100 -Year Flood — base flood elevation determined. Within the ID, the base flood elevation varies from about 11 feet along Alii Drive to about (I 262 and 280 feet for Drainageways 2 and 3, respectively, just below Kuakini Highway. Fringe areas along these drainageways are designated as Other Flood Areas, Zone X — 1 areas of 100 year flood with average depths of 1 -foot. [1 • Drainageway 4 is the northern most drainageway, located along and crossing Royal Poinciana Drive. This drainage way is designated as Other Flood Areas, Zone X. This drainageway branches off the Drainageway 3 and terminates when it converges back into the Holualoa Drainageway — below the Kamani Tree Subdivision. 1 1 4.3 Existing Utilities 4.3.1 Wastewater System 1 Review of available State of Hawaii Department of Health (DOH), Sanitation Branch records indicates that wastewater generated in the ID is typically disposed cesspools. With exception to the homes within the Kilohana Subdivision, the majority of parcels within the ID (including those ( I with "ohana homes ") have one cesspool servicing one home. Parcels with known LCCs include most parcels in the Kilohana Subdivision, the Lutheran Church, Kahakai Elementary School, and a few parcels with duplex homes (one structure with two dwellings and typically only one l - I cesspool) in the Kalani Makai Subdivision. See Exhibit 4.4 for known parcels presently serviced by LCCs. The Kilohana Subdivision includes 79 parcels. Based on review of available DOH records for I' lots with homes, only eight parcels within the subdivision are not presently connected to one of the existing eight LCCs. Records indicate that these eight parcels each have one home serviced +r by its own individual cesspool. There are eight existing LCCs in the Kilohana Subdivision. Each receives flow from a cluster of homes — ranging from between 3 to 19 homes (averaging 9 homes per LCC). Compared to 1_ other subdivisions in the ID, each LCC in the Kilohana Subdivision receives flow from the , highest number of homes. To facilitate serving multiple homes, the subdivision includes existing gravity collection lines consisting of 6 -inch and 8 -inch diameter vitrified clay pipes. These 1. wastewater collection lines are installed under sidewalks, the roadway pavement, and in utility I easements located along the backyards or between of various parcels. All LCCs are located within existing privately owned utility easements. (See Exhibit 4.5 for configuration of the existing collection system and LLC locations within the Kilohana Subdivision.) Review of record subdivision plans indicates that a number of existing sewer manholes within the subdivision have depths of Tess than three feet. Department of Education records show that Kahakai Elementary School accommodates a population of about 670 people (consisting of about 600 students and 70 instructors and support staff). Existing on- campus treatment and disposal of the systems include one individual wastewater treatment and disposal system (septic tank with leach field) that serves the Administration Building (Building F) and four LCCs that serve the cafeteria and remaining school buildings. 1 1 Kilohana Sewer Improvement District 4 -5 Implementation Study -' September 2008 1 r1 Plilise - ./ V . j'n 1 �\ . ILOHAN : ' n i J ��:::� 1 1 , dieb 11::::7\::".i:Ifti.) Cl : : jr: , T;1 :' , ,,, ; 0 - :[ ; t:_;, : : 414713 i:if..,,,,,,., aNall r ...■or 11 Im a *,*/-"" ''' Ina si011111111/111 K AL ANI *t I 1 rNI 111 MAKA 111/ Ing0a#14#14 ( !!i!2i r it l i?' !& * u l III, - � II 111111111 lira vim II ■ r mil LUTHERAN ■ 91111 UM t kisNo pi CHURCH I.i F Vii, `� � � F� LEGEND lei �i IL!!4j(I � � ' iii= � _,l �uIi'11 R : ■ ■ N. 01 i 11! 1 . HOLUALOA 11111 teilft -�' � tmol IMIIIIII re � L AS Et 1 0 111 a 1 I w ap i p /It g � ► l, �ir�� ,ll11 • KILOHANA SEWER IMPROVEMENT DISTRICT Ii GRAPHIC SCALE Hobaloa IMPLEMENTATION STUDY BaY EXHIBIT 4.4 L . 0 500 PARCELS SERVICED BY LARGE . 1 = 500' l-? IN FEET CAPACITY CESSPOOLS SCALE "1 4 SEPTEMBER 2008 4-6 1 � 4 P0 0 1 04) 4 al 1 it ' je 11 _ Mig 111 I KUAKINI HIGHWAY 1 LIPIIII .. pli KILO W # 614 Li Or I 4tSitri". -- - - - - - - rata , pi I ifr...% as 4 0 est- , 1 it - 7- m 4 * ■ .1 eat 1. w ` te e - =� �I m i l� K A L A N I �Bp� P� MAKAI I r st as lerinka* a I (1 t 1' P LAC�B STREH7 ♦ ♦ �i OW 1 0 "Is, . o LEGEND � EXISTING + . f , - - 1 roc Cr 111 8 " SEWER 1 o AY ELk f z 1. ,u, 1 ' , . O " U � KILOHANA EWEMMENT IIIII (1 N 1 I �� sr e IM EN PROVE STUDY DISTRICT g GRAPHIC SCALE EXHIBIT 4.5 1 ! 300 0 300 KILOHANA SUBDIVISION EXISTING WASTEWATER COLLECTION SYSTEM !' I SCALE IN FEET SEPTEMBER 2008 4 -7 � 1 Wastewater generated from the Lutheran Church (at the downhill or makai end of Lako Street), is disposed into an LCC located on the church parcel. The closest County wastewater collection system is located along Alii Drive, makai (or downhill) of the ID. The existing County system collects and conveys wastewater from Kealakekua to _ Kealakehe. The existing system includes gravity lines ranging from 8- inches to 24- inches, and a series of wastewater pump stations and force mains. The wastewater from this collection system ultimately discharges into the Kealakehe Wastewater Treatment Plant. Record drawings indicate that the existing manhole, at the intersection of Royal Poinciana Drive and Alii Drive, includes a 12 -inch stubout. The orientation of the stubout is such at it could be used as a possible connection point for flows from the ID to the existing 24 -inch Alii Drive County gravity line. (See Exhibit 3.2 for location of existing County collection line and existing ( sewer line stubout.) 4.3.2 Drainage Record drawings show that there are a number of small drainage systems within the ID. Each system discharges runoff into a drywell. Typically, catch basins are installed in pairs (located on ( 1 opposite sides of the road) and are connected with 18 -inch drain pipe. The Catch basins are located at low points in their respective drainage areas and typically discharge into drywells. The Holualoa Stream is the major drainage feature within the ID. This is an intermittently flowing stream. When flowing, runoff generated from areas above Kuakini Highway crosses under Kuakini Highway through two 108 -inch diameter corrugated metal pipes. Makai of Kuakini Highway, the stream continues through the ID through an unimproved channel, located �' along the southern perimeter of the Kalani Makai Subdivision. At Kupuna Street, the stream flows under the street through a metal plate arch approximately I 1 10 -foot high by 30 -foot wide. Flow continues in an unimproved drainage channel located between parcels of the Kalani Makai and Komohana Subdivisions. At the north corner of the Kamani Tree Subdivision, flow is conveyed into a 20 -foot wide by 10 deep rectangular concrete lined channel located along the north boundary of the subdivision. Flow from this channel 1_ discharges into a detention basin at the southwest corner of the Kamani Tree Subdivision. If flows over top this detention basin, it flows overland towards the shoreline. (See Exhibit 4.6 for location of stream and major drainage features.) 4.3.3 Water +' Based on record drawings, the ID is serviced by an existing County water distribution system. t The 6- to 8 -inch diameter water mains are located underground, under existing roads. 1 4.3.4 Electrical /Telephone /Cable Television /Street Lights II Within the ID, the newer subdivisions include underground electrical, cable television, and I I telephone lines. Older areas and the Kahakai School Access Road do not have underground service. (See Table 4.1 for summary.) Streetlights are provided along all streets within the ID. I..' (� Kilohana Sewer Improvement District 4 -8 Implementation Study September 2008 [1 �{I EXISTING 2 -108' DIAMETER / - la 1 CORRUGA ' METAL PIPES ' I,1 l l , 11 It -,„\.**Llitiatratitt,illaillaillialir11111 11111 _ mi a ,,, ,,, 1 ,1 i vt i s t4 b *IMO talleir I is mar ' - II � � a ISTI 30' ��,' P, " .02 • 111111 X111 lif ��� /1111 V MOM a ■g11111II11I111111astrilli rn sit) r r ,113[!GL':`�I� S MI l a (S TING 20' WIDE BY 10 ii ■ ' _ p- - EEP CONC LINED • ,111111' �� �� �'• ECTANGUTAR CNAN EL e 111r 11111.�� s II D 111 11'111, �� s ; a N RM WATER INN k DEfF�N - IN 1 00 •� .u11!1�1II/ 1111 � IIl1 1 . resin 1111► Isis II Ma ille -Sellirlitib s irtiiviJ 1111W l i !a 1141 w l ' KILOHANA S EWER IMPROVEMENT DISTRICT ai IMPLEMENTATION STUDY GRAPHIC SCALE Ho EXHIBIT 4.6 �, 50= 50o HOLUALOA STREAM SEPTEMBER 2008 1 " = 500 ... SCALE SCALE IN FEET -. 4 -9 I, [1 TABLE 4.1 ROADWAY DATA [1 Typical Sidewalks Road Name or Right- of- Subdivision Name way Width (yes /no — if yes, brief Underground Utility Line �, — Road Type (feet) description) Types and Locations Royal Poinciana 60 Yes Water Drive — Main Road 4 -feet wide (concrete) on Electrical, Telephone, Cable both sides of the street Television — only in the within the Kalani Makai Kalani Makai Subdivision C I Subdivision only Kupuna Street — 60 Yes Water Main Road ( ' 4 -feet wide (concrete) on Electrical, Telephone, Cable I both sides of the street Television I ' Kilohana 50 Yes Water Subdivision — 4 -feet wide (concrete) on Electrical, Telephone, Cable Secondary Roads both sides of the streets Television sion [1 Komohana Kai 50 and 60 Yes Water Subdivision — 4 -feet wide (concrete) on Drainage Secondary Roads I' (with exception to both sides of the street Electrical, Telephone, Cable Lako Street' with 3- to 6 -foot wide landscaping strip Television I 1 Kalani Makai 50 (side No Water Subdivision — streets) Interior Roads 20 (private t_, roads) Alii Kai Subdivision 44 No Water I — Interior Roads `' Kamani Tree 50 Yes Water Subdivision — Interior Roads ( 4 -feet wide (concrete) on Drainage both sides of the street Electrical, Telephone, Cable Television (! Kahakai School 50 No Water Access Road — Interior Road I 1 . Lako Street is a future main connector road. LI Kilohana Sewer Improvement District 4 -10 Implementation Study September 2008 1_ 4.4 Historical Sites (, An archeological site evaluation was not included in the scope of this study; however, The Great Wall of Kuakini is the one major historic feature that crosses through the ID. The stone wall extends along the southwestern boundary of the Komohana Kai Subdivision and along the northeast boundary of the Alii Kai Subdivision -- about midway between Kuakini Highway and ( Alii Drive. Other areas of historical interest are at least two heiau sites. The more visible and significant of the two is located between Kuakini Highway and the mauka boundary of Kilohana Subdivision. The other is located within the Komohana Kai Subdivision in the parcel at the southeast corner of the intersection of Kaheiau and Kuniki Streets. (See Exhibit 3.2 for location of these sites.) • 4.5 Roadways Royal Poinciana Drive and Kupuna Street makeup the main travelway through the ID. All 11 secondary roads within the ID, directly or indirectly connect to these two roads. I' Majority of the roadways within the ID are County owned. The exceptions are: 1) Royal Poinciana Way, Royal Poinciana Place and Oma Place, which are privately owned; and 2) Kahakai School Access Road and portions of Royal Poinciana Drive, Plumeria Road, and Lehua Road are owned by the State of Hawaii. (See Exhibit 4.7 for location of existing roads and ownership.) Roads within the ID are typically two -lane asphalt cement (AC) paved roadways. Roads are typically in good condition with few potholes or deteriorated surfaces. Exceptions to this include I the Kahakai School Access Road and a few spot locations within the Alii Kai Subdivision. Table ` 4.1 summarizes typical characteristics of the roads within the ID. Research of County information shows two planned roadway improvement projects in proximity to the ID. These include the 1) Lako Street Makai Extension (completing Lako Street's connection from Kuakini Highway to Alii Drive) and 2) Kahului — Keauhou Parkway. See Exhibit I ' 4.7 for location of these road projects and Appendix A background documents. 1 [1 1 Kilohana Sewer Improvement District 4 -11 Implementation Study September 2008 Q o o v Z Q� • r a If N S I Willillir - ."‘ SW ›- 01 *-= = = �� I� �, z o m Li jim v, ig Li i Lb (L) 8 1= w L 5 6 1.1•1 rel SI ob lea * . 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In o /z zao AMP zb-llie 3 [1 (, 5 WASTEWATER COLLECTION SYSTEM ALTERNATIVES I I A number of alternatives considered for the replacing the LCCs and other existing cesspools located in the ID. Due to the size of the existing parcels within the ID, the prevailing terrain, location of the existing County wastewater collection system, and to keep systems relatively simple, the following alternatives were considered most appropriate: �' 1) Connection to the County sewer system; I 2) Installation of an individual wastewater system (i.e. septic tank with leach field) on each lot; and [I '3) Installation of a septic tank or other treatment system upstream of the cesspool and L conversion of the LCC into a seepage pit. (' With consideration to the sizes of existing home lots and since homes have already been built on almost all lots in the ID, the latter two alternatives are not practical. Open land area on each of the the lots may not be adequate for installation of new /additional equipment. In addition, each property owner with individual wastewater treatment systems will be required to provide (' long -term maintenance of these systems and be subject to regulatory monitoring, testing and reporting to the State of Hawaii Department of Health. This will be required for both the treatment and the effluent disposal systems; and will have long -term cost impacts on each [1 home owner — for the long -term maintenance and monitoring. The remaining discussion will therefore focus on providing a central wastewater collection i' system that will connect to the existing County sewer along Alii Drive. The central collection system is a network of pipes that conveys wastewater from its point of origin to a central treatment and disposal location. For this ID, the system will collect flows from all homes and [ I convey it downhill to the intersection of Alii Drive and Royal Poiciana Drive — where it will connect to the existing County system. The existing County system conveys flows to the Kealakehe WWTP for final treatment and disposal. I I Due to the prevailing terrain, the central collection system will include one or all of the following system components: II • Gravity sewers • Pump stations and force mains • Low pressure sewers [11 Provision of a centralized system will require the construction of a new underground wastewater I . ' collection system -- typically in or through existing roads or easements. To overcome areas of flat or hilly terrain, pressurized lines (including pump station and force mains and /or installation of low pressure sewers) may need to be included in the collection system. The system developed in this report is configured to handle all parcels within the ID. I' The main advantages of connecting to an existing regional wastewater system include: ( ' o Wastewater is treated and disposed at a centralized location. 1 Kilohana Sewer Improvement District 5 -1 Implementation Study I September 2008 11 11 o Individual homeowners no longer need to maintain an onsite wastewater system (cesspool, septic tank with disposal seepage pit or field). o Elimination of individual cesspools reduces the risk of contamination of groundwater resources -- since cesspools discharge untreated wastewater into the ground. 11 The main disadvantages of this option include: o The high initial capital cost for the installation of the collection system (pipes, manholes, 11 and pump stations). Some portion or all of the cost associated with the required wastewater system improvements would be borne by the homeowners in the area through possible assessments and connection fees. 11 o Temporary noise, dust, and other disruptions in the community (e.g., traffic detours) during construction. [1 o The treatment facility must also have the capacity to handle the additional flows. o Individual homeowners responsible for proper closure of the existing cesspools — 11 including the closure costs and providing the DOH with documentation of the closure. l o Individual homeowners responsible for providing a connection lateral from the home to the property line — where it will connect to the new collection system. II o Instead of paying for cesspool maintenance, homeowners will pay County sewer fees. 11 5.1 Regulatory Requirements The County and State of Hawaii DOH are the two main regulatory agencies involved moving 11 developing the centralized wastewater collection system. 5.1.1 County of Hawaii 1 _I The County of Hawaii is the main agency that provides design guidelines for the development of the collection system design and for approval of the connection to the County's regional wastewater collection and disposal system. As described previously, in proximity to the ID, the 11 existing collection system extends along Alii Drive, downhill of the ID. The new collection system must be designed and constructed in accordance with current 11 County wastewater guidelines. Owners of parcels located along new wastewater collection lines will be subject to the requirements of Section 21.5 of the County Code -- parcels fronting newly installed sewer mains are required to connect to the County system within 180 days 1' 2 County Code, Section 21.5 requires all parcels fronting newly installed sewer mains to connect to the 11 system within 180 days. Owners are required, at their expense, to connect directly with the public sewer, even if it means installing a pumping station. Kilohana Sewer Improvement District 5 -2 Implementation Study 1 September 2008 5.1.2 State of Hawaii DOH With regards to closure of existing cesspools, the DOH has established guidelines for the proper closure of existing cesspools. These guidelines include reporting requirements to document closures, with closure reports submitted to the DOH. (See Appendix A for closure guidelines and sample reporting forms.) This documentation is required as part of the DOH's UIC program. 5.2 Central Collection System Components li A description of the three main system components, along with the advantages and disadvantages of each, are provided in the following sections. Due to the sloping terrain and existing housing development within the ID, a centralized collection system will need to include a combination of each of these systems. r� 5.2.1 Gravity Sewers ll A gravity sewer system relies on the force of gravity to convey wastewater from one point to the other. To accomplish this, adequate slope must be provided along the pipe sections, such that flow can move through the system. This works well where the terrain slopes downhill and there are preferably no low spots along the route. (See Exhibit 5.1 for profile view of typical gravity sewer components.) Advantages of this type of collection system include: • Relies on pipe slope to convey flow. • Low maintenance cost (no power costs). [1 Disadvantages include: - • Not usually suitable for areas with rolling terrain (numerous high and low spots). With this type of terrain, it may not be possible to connect all parcels. • Sewer lines may need to be installed at deep depths in order to provide the required downhill slope. This is particularly true where the existing terrain is relatively flat or goes adverse to the slope of the pipe. • Need for acquiring sewer easements to service selected parcels. 5.2,2 Pump Stations and Force Mains Where low spots occur within the collection system or the terrain is very flat, it may not be 1 possible or practical to convey flow purely by gravity lines. To minimize excessively deep l excavation and to move flow through low -lying areas, construction of a pump station and force main may be required. The pump station typically includes a collection pit (called a "wet well ") that collects incoming wastewater flows. When the water level within the wet well rises to preset elevations, sensors (, in the wet well activate one or more pumps are to convey the flow out of the wet well and push is through the system in a pressurized pipe (called a "force main "). The pumps are sized to provide sufficient pressure to move low out of low -lying areas. Force mains typically discharge l Kilohana Sewer Improvement District 5 - Implementation Study September 2008 [1 ri [1 EXISTING GROUND OR ROAD SURFACE SMH [ 1 �- SMH II PIPE SMH I_, pip _ L' PI 11 [i LEGEND 11 GRAVITY SEWER PIPE 0 n 1 a • SEWER MANHOLE (SMH) 11 '' DIRECTION OF FLOW —� I o To KILOHANA SEWER IMPROVEMENT DISTRICT I1 L IMPLEMENTATION STUDY EXHIBIT 5.1 II NOT TO SCALE TYPICAL PROFILE - GRAVITY SEWER II SEPTEMBER 2008 5 -4 1 I into a transition sewer manhole at the uphill end of the next gravity line. See Exhibit 5.2 for schematic diagram of a pump station and force main system. 1 Advantages of this system include: I.' • Moves flow out of low lying areas or flat areas • Centralizes pumping requirements for the system. [ 1 The disadvantages include: • Requires both gravity mains and force main pipes. I 1 • Long term power and maintenance requirements — adding to cost impacts. • Land area requirement for installation of the pump station (approximately 20 feet by 20 feet minimum). I ' • Possible need to acquire land by eminent domain. 5.2.3 Low Pressure Sewers I., This type of system is well suited for areas where sewer laterals from individual homes cannot flow by gravity directly to the main collection system. This may occur in areas with house pads I' that are at lower elevations than the street, or in areas with undulating terrain. In a low pressure sewer system, typically, a small low flow and low lift pump station in installed on each of the affected parcels to pump the wastewater from the lot and into the nearby main collection line. I, See Exhibit 5.3 for schematic diagram of a low pressure sewer system. These individual on -site pump stations are typically packaged -type pump stations that include a [I submersible grinder pump. Force mains are typically small diameter (typically 1A to 2- inch). See Exhibit 5.4 for typical packaged grinder pump unit. Advantages: I' • Reduces the number of sewer lines and easements through private property. • Smaller pipelines and shallower trenches required for sewer mains in the roadway. 11 Disadvantages: (, • Individual low head grinder pump stations to be installed and paid for by the individual home owner. Since the pumps are located within each parcel, this cost is not part of the sewer improvement district. I .1 • Individual low head grinder pumps to be maintained by the individual home owner. It is noted that these pumps have mechanical and electrical components which require occasional servicing (dependent on the manufacturer's recommendations). I, • Requires public acceptance of the system. I1 I, Kilohana Sewer Improvement District 5 -5 Implementation Study 1 September 2008 1 II 1 1 EXISTING GROUND OR ROAD SURFACE 11 _ SMH .,7-BUILDING PUMP STATION SMH I, \ ___,_,_ LI %°F FM PIPE p , 11 pi i' I, II LEGEND 11 FORCE MAN (FM) PIPE GRAVITY SEWER PIPE 1 II rl SEWER MANHOLE (SMH) I - ' DIRECTION OF FLOW I KILOHANA SEWER IMPROVEMENT DISTRICT 11 IMPLEMENTATION STUDY a- EXHIBIT 5.2 I ! NOT TO SCALE TYPICAL PUMP STATION AND FORCE MAIN (PROFILE VIEW) 1 ' SEPTEMBER 2008 III . LI EXISTING GROUND OR ROAD SURFACE I / ...-- 1 ------,. .. Z. ,____, \ 0 PRESSURE Sale I PROFILE VIEW II I_' PROPERTY LINE I LOW PRESSURE 111 ' GRINDER I SEWER LINE ( ' PUMP UNIT o I I_ t LI I , I L CHECK VALVE AND NOTE: GATE VALVE HOMES HOOKED UP [' INSTALLED IN BOX ALONG LENGTH OF LOW m PRESSURE SEWER LINE. II e t I w TYPICAL HOUSE HOOK -UP I PLAN VIEW I' LEGEND 1 ry 4 ° LOW PRESSURE SEWER I o PIPE (SMALL DIAMETER) NOT TO SCALE GRAVITY SEWER PIPE ■ 4 KILOHANA SEWER IMPROVEMENT DISTRICT I' o n IMPLEMENTATION STUDY I S EWER MANHOLE (SMH) EXHIBIT 5.3 I' - LOW PRESSURE SEWER DIRECTION OF ROW _> IF SEPTEMBER 2008 5 -7 ii I 1 1 I OP !` 1 , W Cl_ / 111 r W oo� 1 m 0 ° 0_ I Co 1- ` r o I r Ni > 1- 1- - ts, __I 1 / • Z� z o� D 1 0 O r 0 Z II i n 1' 1 r w b` J U L u__ 0 0 W = w °_ ti r wcL I N W J / � ��`' r N W 0 O 1 r 0 Z 00 / SIC 0 0- 1- II 1 / , _ Aiiike , I"���G\ V V 1 < 1.8' > DIAMETER OF 1 . GRINDER PUMP UNIT 1 w N I NOTE: THIS IS A SAMPLE GRINDER PUMP STATION UNIT. ACTUAL DIMENSIONS MAY VARY DEPENDENT ON SITE CONDITIONS. 1 0 g NOT TO SCALE KILOHANA SEWER IMPROVEMENT DISTRICT I rz IMPLEMENTATION STUDY EXHIBIT 5.4 O REFERENCE: E /ONE SEWER SYSTEMS, SAMPLE - GRINDER PUMP w ENVIRONMENT ONE CORPORATION. (SECTION VIEW) I L- SEPTEMBER 2008 5 -8 6 DESIGN CRITERIA , The County of Hawaii references to the City and County of Honolulu Wastewater Management design standards for wastewater system design guidelines (hereinafter referred to as the "Wastewater Standards "). The Wastewater Standards provide guidelines for the development I of wastewater flow projections. [Reference: 2] 6.1 Wastewater Flow Projections ' The following criteria was used as the basis for the flow projections developed in this report (see spreadsheets in Appendix B). j' 6.1.1 Design Average Wastewater Flow, Q Q = Flow rate from homes + flow rate from apartments + flow rate from schools 1 o Flow rate from homes = Number of Single - Family Homes x Average Daily per Capita Flow x Population Density ' Where: Average daily per capita flow = 80 gallons per capita per day (gpcd) Population Density = 4 people per single - family home I o Flow rate from apartments = Number of Apartment Units x Average Daily per Capita Flow x Population Density ' Where: Population Density = 2.8 people per apartment unit o Flow rate from schools = Number of People at the School x Average Daily per Capita Flow I Where: Average daily per capita flow = 25 gpcd 1 Therefore, Q = (Number of Single - Family Homes x 4 people per home x 80 gpcd) I + (Number of Apartment Units x 2.8 people per apartment x 80 gpcd) + (Number of People at the School x 25 gpcd) 6.1.2 Design Peak Flow, 4, , Q. = Q x Maximum Flow Factor, MF + Dry Weather Infiltration /Inflow, 1/1 + Wet Weather 1/1 1 o MF = 5 /(population, in thousands) where MF is always less than or equal to 5 ' o Dry Weather I /1 = Per capita dry weather I/I rate x population 1 3 Infiltration / Inflow (I /1) are additional flows that enter the sewer system through various points along the sewer lines. Infiltration is flow that typical points of entry include cracks in the piping or poorly fitted joints. 4 Dry weather I/1 is baseline infiltration into the wastewater collection lines, typically due to groundwater. Kilohana Sewer Improvement District • 6 -1 Implementation Study ' September 2008 11 Where, per capita dry weather I/1= 5 gpcd 11 o Wet Weather I /1 = Per acre wet weather flow rate x total acreage Where, per acre wet weather flow rate = 1250 gallons per acre per day (gpad) 11 Therefore, Q = Q x MF + (population x 5 gpcd) + (total acreage x 1250 gad) 6.1.3 Summary - Improvement District Flow Projections Based on these design guidelines, it is computed that the proposed Improvement District will add a total of approximately 0.24 / 1.27 million gallons per day (mgd), average /peak flow, respectively. Design flow rates for each of the subdivisions and the school located within the proposed Improvement District are summarized on Table 6.1. 11 Table 6.1 SUMMARY — WASTEWATER FLOWS (MGD) Location Design Average Design Peak 11 Kilohana Subdivision 0.025 0.157 Kahakai Elementary School 0.017 0.089 Kalani Makai Subdivision 0.034 0.200 11 Kamani Tree Subdivision 0.034 0.192 Alii Kai Subdivision 0.073 0.417 Komohana Kai Subdivision 0.079 0.506 11 Miscellaneous Parcels (between Kahakai 0.003 0.018 ( School Access Road and Alii Drive) 11 6.2 Gravity Sewer Design Considerations 1 6.2.1 Line Sizing All gravity sewer lines shall be sized to carry the design peak flow, Q,. 11 Velocity of flows in pipe, V: Maximum = 10 feet per second (fps) Minimum = 2 fps, when pipe is flowing full 1' 5 Wet weather I/1 is additional flow that enters the system during rain events. Kilohana Sewer Improvement District 6 Implementation Study 11 September 2008 Basic Formula: (Manning's Formula) V= 1.486 r v3 s tt2 / n I ' Where n = 0.015 for all pipes up to and including 18 -inch diameter pipes r = the hydraulic radius (feet) .11 = the diameter of the pipe (d) /4, for full flow conditions s = the slope of the pipe (feet /feet) • 1 Minimum Pipe Size • Mains and branch mains in roadway areas: 8 -inch diameter I • Branch mains in easements: 6 -inch diameter (Provided that branch main does not serve more than 10 residential lots and 1' there are no possibilities of extensions.) 6 .2.2 Minimum Cover Over Sewer Lines {� • Paved Areas: 4 feet { • Sidewalks: 3 feet • Private Property (not subject to vehicular traffic): 2 feet 6.2.3 Manhole Spacing 350 feet maximum for pipes up to and including 18 -inch diameter pipe f l 6.3 Pump Station and Force Main Considerations 11 6.3.1 Wet Well Sizing: • Minimum pump cycle time (period of time between pump starts) = 5 minutes • Maximum retention time (time wastewater held in the wet well) = 30 minutes at average flow C1 6.3.2 Force Main Sizing: 111 • Minimum pipe diameter = 6 inches • Minimum pipe velocity = 3.0 fps (desirable) = 1.75 fps (absolute) 11 • Maximum pipe velocity = 10.0 fps 6.3.3 Minimum Cover Over Pipes: • Paved Areas: 4 feet • Sidewalks: 3 feet 1,' • Private Property (not subject to vehicular traffic): 2 feet 11 Kilohana Sewer Improvement District 6 - Implementation Study ' September 2008 ■ I1 I I p 7 IMPROVEMENT DISTRICT SUB - BASINS I i It is estimated upon completion of the entire collect system is completed for the ID, it is estimated that this will add an average daily flow of about 0.24 million gallons per day (mgd) to the existing County system. On a peak flow basis, about 1.27 mgd will be added to the existing j 1 County system. Construction of the sewer collection system will be broken up into five phases: the main collection system and four sub - basins. Based on records from the State of Hawaii Department of Health (DOH) and real property data, priority has been given to connecting the Kilohana, the and Kalani Makai subdivisions to the County system. These areas were given higher priority since they include LCCs. Converting these areas in an early phase eliminates known LCCs and ' brings the ID in compliance with the EPA LCC closure mandate. Backup spreadsheets for sizing of the collection system are provided in Appendix B. i , 7.1 Main Collection System The Kilohana Subdivision is located at the upper end of the ID. To connect the Kilohana Subdivision to the County system, a main gravity sewer line installed along Royal Poinciana Drive and Kupuna Street will be required. This main collection line connects to the County system through an existing sewer manhole stubout at the intersection of Alii Drive and Royal Poinciana Drive. This 4,760 linear foot sewer line extends to the intersection of Kupuna Street with Lako Street and is comprised of 8, 10, and 12 -inch diameter pipes. A total of 71 parcels will be directly connected by gravity sewer to the main collection line. This accounts for 13 parcels located on Haku Place (within the Kilohana Subdivision) and an additional 58 parcels immediately along the Kupuna Street and Royal Poinciana Drive (see I Exhibit 7.1). This collection system eliminates two of the existing LCCs within the Kilohana Subdivision. I Based on information from record drawings, two of the existing Kilohana Subdivision gravity lines can be directly .connected to the main collection system in Kupuna Street. These two segments are located in Haku Place and in the existing utility easement between Haku Place and Uuku Place. Approximately 70 linear feet of gravity sewer line will be required to make these connections. The existing gravity sewer lines that feed these two segments will be retained. Portions of the existing sewer lines are located in privately owned utility easements situated between parcels, these lines will continue to be maintained by the Kilohana Subdivision Homeowner's Association. The existing gravity lines that are located within public streets and + may become part of the County system after inspection and County acceptance. 1 I Upon the completion of the main system line, two of the original eight Kilohana Subdivision LCCs will no longer be required. These LCCs must be backfilled and closed in accordance with current DOH requirements. Closure documentation must also be prepared and submitted to the I DOH. The LCCs are located within private easements; therefore, closure of these two LCCs and the associated cost involved is the responsibility of the Kilohana Subdivision Homeowner's Association. 1 Completion of the main system line will also make it possible to connect Kahakai Elementary School can be connected to the County wastewater collection system. Upon initial inspection, I 1 Kilohana Sewer Improvement District 7.1 Implementation Study ( 1 September 2008 I 1 1 a 111111111111•Thia ,II'' • . al i,I '� .�ILOHA,�.� ,I •i nos tca 1 ■ * In blit **** VA% 70 111111 11 1 i illtaa 0 , et it i fr* in • anliiti fi l I. i,,, MAKAI $?I iiitt 'lt" 1 1iIIu ; (,! ies _ r 1 � 1 inuentison Imo N, ,,,,,,,,,,,,, ll ,. GREAT WALL easited ill 1 ■ — A� . ■ 111 OF KUAKINI ■ su p„,„.,„, a rang a �, l F ii!111 OP x ' at °'� '©I ` i s rs I■ ■, LEGEND ea CHURCH 1111 a _ Fi • 11 ■ PRIMARY TRUNK UNE L ! ri PaillIM i d 11 11::, • NEW SEWER MANHOLE =� ,■ ■ o EXISTING SEWER 'I 111— .nkilliat � I..I — — MANHOLE ■. ■ ■ ■� ADE r,r vt t " -:_-4 „ ` IMPROVEMENT DISTRICT UMW o II��:�: J.ri Y __ BOUNDARY I' I ROAD - STATE OWNED c) IIIIIII i LII�, = I /I I MAIN SYSTEM LOTS I s . II) l HOLUALOA GP "" ow BAY IL GP PUMP (PRIVATE) a ■1 �f VILLAS 1 Notes: o MUri VY'sq L%y:E' �� ' r 1. Ea PiOes are 8 -inch diameter unless otherwise noted. L 1 ; /A 2. Easement may be required for lines within State ` _ m mom I Rights-of-ways. �, o LiiijIJ!1 I - I II 12, - ' r KILOHANA SEWER IMPROVEMENT DISTRICT i. ° �' HoGvaloa IMPLEMENTATION STUDY GRAPHIC SCALE Bay EXHIBIT 7.1 �1 so� 500 MAIN COLLECTION SYSTEM 1 =soo' .mi.., SCALE IN FEET 1 SEPTEMBER 2008 7 -2 { this may require installation of a pump station at the school and a force main along the State owned school access road. Installation of the pump station and force main will be the Department of Education's (DOE) responsibility. 11 ' 7.2 Sub -Basin 1 (Kilohana and Kalani Makai Subdivisions) ! 1 The Sub -basin 1 system will service the remaining portions of both the Kalani Makai and Kilohana Subdivisions. Due to the topography of the area, this sub -basin will require at least one pump station (Pump Station 1) and about 1,500 linear feet of force main lines (see Exhibit 7.2). The pump station shown is located within an existing Kilohana Subdivision utility easement. The force main will discharge into a gravity sewer along Royal Poinciana Drive. [Note: Based on record drawings, the existing easements are typically 10 to 25 feet wide. This should be adequate for installation of a packaged pump station unit.] Approximately 720 linear feet of additional gravity sewer line will also be required to complete the Sub -basin 1 system. Portions of the Sub -Basin 1 collection system, are located within private property. This includes low pressure and gravity sewers located along Royal Poinciana Place, Oma Place and Royal Poinciana Way within the Kalani Makai Subdivision, and improvements within privately owned easements within the Kilohaha Subdivision. Improvements in these privately owned areas, including Pump Station 1, will be the responsibility of the respective land owners and /or homeowners' association(s) and is not included as part of the County system. 1 Sub -Basin 1 improvements adds about 75 parcels to the County system and eliminates the remaining six Kilohana Subdivision LCCs. Closure of these six LCCs and any LCCs in the Kalani Makai Subdivision, as well as the reporting these closures to the DOH, will be the 1 1 responsibility of the respective owners or home owners' associations. 7.3 Sub -Basin 2 (Alii Kai Subdivision) L' Sub -Basin 2 adds all of the remaining parcels within the Alii Kai Subdivision to the collection system. This includes the addition of about 3,820 linear feet of gravity sewer line and about 2,340 linear feet of low pressure force main line (see Exhibt 7.3). 1 Due to the sloping conditions within this sub - basin, there are a number of parcels where house pad elevation is lower than the adjacent street elevation. To minimize depths of sewer lines (, located along these areas, homeowners with low pad elevation will need to install individual low pressure grinder stations on each of their lots. The grinder pump will convey flow from the home and discharge into a gravity line located in the street. This will be required for selected homes located along Plumeria Drive, Lehua Street, and Pakalana Road. These individual low pressure grinder pumps will be installed and maintained by the individual home owners. l For parcels along lower portions of Plumeria Drive, low pressure residential grinder pumps and small diameter low pressure force mains located within the roadways will be required. The small diameter low pressure force mains will discharge to the gravity sewer line along Plumeria Drive and Royal Poinciana Drive. t Approximately 181 parcels can be serviced within this sub - basin. �! Kilohana Sewer Improvement District 7 - Implementation Study 1 September 2008 l� il (-1 � � HIGHWAY 1 J'' K UAKINI &W... h KILO •. 4 ABANDON f1 , ' O ► �lailitalt S . t s. , s tw p � . ® � l ®gym wie* STUBOUT FOR -`� , . o � � � ' __ FUTURE No. * A ,�..r CONNECTIO � Pt+c�. 1 ; 44 ° II E j1mil E A AKA! I I i j&b t (i a fill er �� I � � �� �; TRUNK SEWER LINE . 1 I� G���� `i � ' �� ■ AND MANHOLE l;1 m Imun , UM = . sRSSr NEW SEWER LINE AND I MANHOLE (PRIVATE) _N,,,,:= I - . NEW SEWER LINE AND —0— MANHOLE K A IN: MANHOLE (COUNTY) I , - LI „' __ = n F T .R GRINDER PUMP (PRIVATE) GP 1 1 \ 11111 ... N - SUB —BASIN 1 LOTS � � F a L I I I MI MI 1. otes: 1. All pipes are 8-inch diameter unless otherwise noted) 1 I o . Sub -basin 1 includes Kahakai Elementary s y 2 School N I © KILOHANA SEWER IMPROVEMENT DISTRICT 1 m E: � - IMPLEMENTATION STUDY GRAPHIC SC ALE EXHIBIT 7.2 +' ^ 300 0 300 SUB -BASIN 1 11 1" = 300' r�t ■ �_ SCALE IN FEET SEPTEMBER 2008 1 74 1 i I was imes . • It 11,,,,�•11AL PON'r ;.�: r.� .® E tale , Illw o untrimihnbie libia.., la s, KillintlIlillig 1111110 Nit d , F a • tams I I 1t';1r a , 11 . ts, �■ W 1 1 ®- bC ��mmd�i■� ,2 GP ■ { ���] GP ,. 1 1 17: M- L 12° LEGEND `11 pa I ---.-- TRUNK SEWER LINE MI AND MANHOLE o 1 1 ° 1 11 111 1 12 " — 0-- ■' — 0-- MANHOLE (COUNTY) GP GRINDER PUMP PRIVATE 111 1111111 111 12 tv",, i ROAD -STATE OWNED ,o I Notes: I SUB -BASIN 2 LOTS m 1. All pipes are 8 -inch diameter unless otherwise noted. _S- q ■ - 2. All cesspools closed and abandoned. Me 3. Easements may be required for sewer lines m State KILOHANA SEWER IMPROVEMENT DISTRICT 11 z rights -of -ways. I I r r Film IMPLEMENTATION STUDY GRAPHIC SCALE EXHIBIT 7.3 (1 " 300 0 300 SUB -BASIN 2 " � = 300 ' ? . . I w SCALE IN FEET SEPTEMBER 2008 7 -5 I 1 p1 7.4 Sub -Basin 3 (Kamani Tree Subdivision) (, This sub -basin area will add the Kamani Tree Subdivision to the County system — adding about 4,800 linear feet of 8 -inch gravity sewer lines. 1 Sewer lines servicing all parcels within the Kamani Tree subdivision will gravity flow towards the existing County drainage system de- silting basin. From this location, the gravity system will be routed through an easement along the south side of the de- silting basin (for the proposed Mauka -Makai Collector Road). This will discharge to the gravity main along Royal Poinciana Drive (see Exhibit 7.4). The addition of Sub -Basin 3 will add about 84 parcels to the County System. 7.5 Sub -Basin 4 (Komohana Kai Subdivision) 1 I Sub -Basin 4 encompasses the entire Komohana Kai Subdivision (approximately 250 parcels). Based on available records regarding the topography in this subdivision, the proposed sewer collection system improvements for this sub -basin includes installation of gravity sewers, low - pressure sewers, and a number of individual grinder pump stations. See Exhibit 7.5 for proposed improvements. Effort was taken in developing this internal collection system to maximize the use of gravity sewer lines — thus minimizing future long -term recurring costs for _ maintenance and power. Flow from the Lutheran Church site will need to connect to the low pressure sewer at the end of Lako Street. /-1 Flows from this sub -basin is conveyed through main collection line through Sub -Basin 3. 1 [Note: Based on information found on the County website and verified in later discussion with the County personnel, an extension of Lako Street down to Alii Drive is being planned. (See Exhibit 4.7 for approximate location of the Lako Street extension.) The location of this proposed road extension and the prevailing topography, would have facilitated routing of a second trunk (I line down to Alii Drive. This Lako Street trunk line could have been used to service about half of t the Komohana Kai Subdivision and the Lutheran Church. However, due to uncertainties regarding the timing of this road extension project, and to address servicing the entire ID along existing roads, consideration of providing a second trunk line along the proposed Lako Street extension is not included in this report.] 1 Low pressure sewer systems, including the installation of residential low pressure grinder pumps at_each parcel and small diameter low pressure force mains installed within the streets fronting the parcels, is recommended a number of locations along streets to the east of Lako Street. This includes about 75 percent of Kupuna and Kaheiau Streets and Kenika Place; all of 1_1 Halawai Place and Way; and the lower half of Kekai Street (below Halawai Street). Similar to Sub -basin 2, there are a number of parcels with house pads at lower elevations than 11 the adjacent roadway elevations. Gravity flow between these homes and the gravity line located in the street is not feasible. For these locations installation of individual residential low pressure grinder pump stations will be required to convey flows from the homes to the gravity 1 sewer line (installed in the street fronting the parcel). Kilohana Sewer Improvement District 7 - Implementation Study 1 September 2008 11 YAP LEONE E l STREET 1 �/ i , SIC . t �jag- W o il 1 1 1 ORO � % �O. iiii ( 1.�,. n X11, - will. p �� 1 -= © A N 7 t3 mil, 1 1 EN I 1D ft *_ fl fl gi 'j ■ t -w , 1 INILRons ■ 1i III ter gel . l� i s LEGEND 11 i MAIN SEWER LINE AND --*— SEWER EAS, MENT - ER EASEME MANHOLE REQUIRED REQUIRED / ill NEW GRAVITY SEWER —0---- AND MANHOLE HOLUALOA (COUNTY) L ' a 11191 VILLAS SUB -BASIN 3 LOTS SI R �� N Notes: 1. All pipes are 8 -inch diameter unless otherwise -S-- noted. i, o — 2. All ces spools closed and abandoned. Holualoa KILOHANA SEWER IMPROVEMENT DISTRICT 1 = IMPLEMENTATION STUDY -- GRAPHIC SCALE EXHIBIT 7.4 1 I a 300 0 300 SUB -BASIN 3 1" = 300' �_ ■ SCALE IN FEET SEPTEMBER '2008 L' 7.7 r Ir 4 I r 0N- w N o o W OD ' w S N F- ire < m 1- w all IN me d is, cL v a o ti a N Lq Z �' w s o a m O� 1 a EE ��� . 3/441 eti _ i Xm , W I all S ftft aft ft* 9 c7 a I � ram l 0 �/I _1 �Ij I h I' 1.1.1 p- �� ' a o ® � cn • w ® ®�� aw re cc J a ®� �. o u) LU al N om∎ � � • - - -- -_� � ' Wow J aK "Nil Ella ® Q v ®i SST a ®� ®�® U ° n Cr) :1+ + - N 1J . ad + U-±-- nn aliti • ,,tea ; v ®/® ilit cc a ill ES g ill wft:ainirtilkrar ■crAkt mt N- z z 0 M ii DD " _ l II .u ■ N b a CO � ' a N • al. S C7 0 SW? IA a � 1 N ki � � tr, apriain. El E : IN I II\ a nee sain■ • , • , . /11/1 I ff lir Waal,. Wali Mt IIMIIMIM1111 .■ a-. .© : N I dil, r4\ 6■411W \ail VA an r 1 1044(4) • as ia ( i imp. „owNv), , g o ve. ■ . 4XL azacith d ' �'• ' ezr tatimonorsvani bn1o� : _ � '. / bi !e or S:go% 1111 123 al taw an as i as a um as a m o za ao en "la ,1 I ,1 Over three quarters of the parcels located in this sub - basin, including the Lutheran Church parcel will therefore require grinder pump stations. These individual low pressure grinder 11 pumps will be installed and maintained by the individual home owners. (1 • • LI • (1 [� (1 [1 i (.1 1_I 1. I 11 (1 Kilohana Sewer Improvement District 7 -9 Implementation Study [ 1 September 2008 11 1 8 ESTIMATED CONSTRUCTION COSTS I The cost estimates presented in this report are in 2006 dollars. The estimated probable construction cost for County improvements to service the entire ID is $8,510,000. The estimated construction cost of each development phase, as identified in Section 7, is 1 1 summarized in Table 8.1. A detailed breakdown of these estimates is provided in Appendix C. cost estimate includes labor, materials, equipment, contractor's overhead and profit, and construction contingencies. Table 8.1 SUMMARY: PROBABLE CONSTRUCTION COST (COUNTY PORTION ONLYI Su -Basin Cost Main Collection $ 1,470,000 System 1 $ 310,000 1 2 $ 2,190,000 3 $ 1,490,000 4 $ 3,010,000 Total $ 8,510,000 (1 ] This study was prepared using available record drawings and site visits only — no additional site l� specific studies were included. The probable cost estimate was developed based on preliminary quotes from manufacturers, analysis of bid prices for similar projects, and current construction cost averages from cost reference data. The cost for repaving of County streets were also [, limited to the payment trench widths within the roadways and do not include repaving the entire roadway widths — for roads affected by construction activities. This estimate is intended for budgetary purposes. This budgetary estimate may differ from the probable construction costs developed during the design phase — using site specific data (e.g., ground topographic survey information, etc.) A 20 percent contingency has been included in this estimate. This contingency factor was ", included in an attempt to account for uncertainties associated to not using site specific data. Uncertainties may include, but are not limited to: unforeseen site conditions, changes in the { local construction climate, changes to the configuration of the proposed system, special construction methods, change in permitting requirements, and new regulations. These items have the potential to impact/increase construction costs. 11 Cost for the abandoning existing cesspools and, where needed, installation of individual residential grinder pump units and other sewer improvements in privately owned roads is not included in the Table 8.1 total. Description of other non - County improvements required to connect all homes in the ID to the proposed collection system is provided in Table 8.2. 1' Kilohana Sewer Improvement District 8 -1 Implementation Study 11 September 2008 11 { Table 8.2 Summary: Non - County Sewer Improvements I 1 Item Sewer Improvements Required Comments I Existing Abandon and backfill all existing cesspools Cost borne by each individual home - Cesspools owner or subdivision association (including LCCs) - DOH closure forms must be filed, 1 - Backfill existing cesspools in accordance with DOH guidelines 1 - Final closure documentation to be filed with DOH Sewer Laterals Construction of sewer lateral from existing - Cost borne by each individual home 1 house to property line owner Grinder Pump Installation of grinder pump units and - Cost borne by each individual home 11 Units appurtenant piping /valving required for owner selected homes - Required for homes at elevations lower than nearby new gravity sewer I.'II lines or where configuration of 111 existing roads do not allow flow by gravity Kilohana - Reconstruction of selected sewer lines - Cost borne by subdivision association Subdivision and manholes located within existing sewer easements { - Addition of selected sewer line segments (as discussed in Section 6) Kalani Makai Construction of gravity and low pressure - Cost borne by subdivision association 1 Subdivision sewer lines servicing homes located along privately owned streets 1 Kahakai On -site improvements to collect campus Cost borne by the DOE Elementary flows and construction of connecting May require installation of pump School sewer (from campus to Alii Drive) station and force main 1 Lutheran Church - Closure of existing wastewater system - Cost borne by church - Addition of grinder pump unit and - Existing wastewater treatment and pressurized lateral to connect to disposal system to be closed and County system (end of Lako Street) abandoned in accordance with DOH including on -site collection system guidelines modifications, as required (i L1 i _. Kilohana Sewer Improvement District 8 - 2 Implementation Study September 2008 �1 . 1' 9 PRELIMINARY IMPLEMENTATION SCHEDULE If construction is completed five in consecutive phases, it is estimated that completion of the LI County portion of the recommended system can be completed in approximately three years. A breakdown (by sub - basin) for this estimate is provided in Table 9.1. This estimate does not 1. ., include non - County system improvements (to be undertaken by individual home owners, home owners' associations, and /or the State of Hawaii Department of Education). Table 9.1 1 Implementation Schedule Sub -Basin Description Duration 11 Main - Main collection sewer lines along Kupuna Street 9 months Collection (from the intersection of Kupuna and Lako Streets) System and Royal Poinciana Drive Li - Connection to existing County sewer system (located along Alii Drive) 1 1 - Kilohana Subdivision 6 months - Kalani Makai Subdivision (with stubout for future subdivision build -out) - Kahakai Elementary School (connection point provided) i' 2 - Alii Kai Subdivision 6 months (.1 3 - Kamani Tree Subdivision 6 months 4 Remaining portion of Komohana Kai Subdivision 9 months 1' (inclusive of remaining portion of Secondary Trunk Line) lL TOTAL 3 years (1 [1 1_I ( 1 {' Kilohana Sewer Improvement District 9 - • Implementation Study September 2008 1' [1 10 SUMMARY To eliminate existing LCCs and upgrade the existing wastewater system in the ID, provision of a centralized collection system was determined to be the most practical alternative. The proposed system will connect to the existing County collection system at the existing sewer (' manhole at the intersection of Alii Drive and Royal Poinciana Drive. Wastewater generated from the ID will be conveyed to the County wastewater treatment plant for final treatment and disposal. 1 The proposed system includes both gravity and pressure sewers (pump stations and force mains, as well as low- pressure sewers). Pressure sewers have been recommended for areas with undulating terrain or areas with house pad elevations lower than the trunk sewers. , The proposed system configuration is contingent upon; (( - From Kamani Tree Subdivision to Alii Drive: Confirming that the proposed sewer line can be installed in the future road easement (see Exhibit 7.4); and - In Alii Kai Subdivision: Acquiring utility easements along State owned street sections within this subdivision (see Exhibit 7.3). The system is proposed to be constructed in five phases. Assuming that each phase is built in t 1 consecutive order (one project completed before starting the next) and construction funds are t available, it is estimated that the entire ID can be completed in about 3 years. The probable construction cost for the County portion of the proposed improvements is estimated at $8,510,000 (2006 dollars). This estimate does not include improvements in privately owned streets /driveways and lots, items such as: 1 . , 1 General - Closure of existing cesspools or treatment units 1, - Installation of lateral from house to the property line Installation of individual grinder pump units (one per home), where needed ( 1 Kilohana Subdivision (Sub -Basin 1) - Modifications /additions to the existing collection system in selected locations �' within existing privately owned easements Closure of the LCCs Kalani Makai Subdivision (Sub -Basin 1) 1_' - . Installation of low pressure sewers and gravity sewer lines in private roads -- Oma Place, Royal Poinciana Way, Royal Poinciana Place ff Collection system within the future development area K ahakai Elementary School (Sub -Basin 1) _ Modifications to on- campus wastewater collection system Connector sewer to the Main Collection System (along Alii Drive) � 3 Kilohana Sewer Improvement District 10 -1 Implementation Study I' September 2008 Komohana Kai Subdivision (Sub -Basin 4) - Installation of low pressure sewer to service lots along the privately owned driveway at the end of Kekai Place Lutheran Church (Sub -Basin 4) - Modifications to or possible closure of the existing wastewater system - Connection to the low pressure sewer at the end of Lako Street [1 I, 1 I' (' [' I I _I Kilohana Sewer Improvement District 10 -2 Implementation Study September 2008 I' 1 11 REFERENCES 1. Alii Kai Incorporated, 1963. Construction Plans for Alii Kai Subdivision, Unit I, 11, and III. 2. City and County of Honolulu, July 1993. Design Standards of the Department of (( Wastewater Management, Volume 1. 3. Engineering Solutions, Inc, June 2005. Assessment Report, Eliminate Large Capacity Cesspools, Various Schools, Volume 2. 4. Fleming, Leo, 1979. Construction Plans for Komohana Kai Subdivision, Unit I, II, and III. 5. Fleming, Leo, 1985. Construction Plans for Kalani Makai Subdivision, Increment 1, II, and 6. JPS Hawaii, Inc, 1989. Construction Plans for Kamani Tree Subdivision. I' 7. Kona Industries, Inc. 1972. Construction Plans for Kilohana Unit 1-A. ( 8. Low Pressure Sewer Systems Using Environment One Grinder Pumps I7' 9. Pacific Division, Naval Facilities Engineering Command, Pearl Harbor, Hawaii, January 2002. Cost Data Book. -' 10. RS Means, 2003. Heavy Construction Cost Data, 13th Annual Edition. ( I 11. State of Hawaii, January 2004. Hawaii Administrative Rules, Title_ 11, Department of Health, Chapter 62, Wastewater Systems. 12. State of Hawaii, Department of Health, Environmental Management Division, Wastewater �' Branch. Brochure on Hawaii's Clean Water State Revolving Fund (CWSRF) Program. 13. State of Hawaii, Department of Health, Environmental Management Division, Wastewater ( 1 Branch, September /October 2004. Water Spot 2004, Volume 8, Issue 5. 14. United States Department of Agriculture Soil Conservation Service, December 1973. Soil t 1 Survey of Island of Hawaii, State of Hawaii. 15. United States Environmental Protection Agency, September 2002. Wastewater Technology Fact Sheet, Sewers, Pressure. 1 . 1 11 Kilohana Sewer Improvement District 11 - Implementation Study September 2008 II . 1 - 1 I f - 1 f1 11 [I I-1 [1 1. APPENDICIES I 1 [1 I I 1 [,1 (,1 I,1 [1 [1 [1 1 ! =1 [1 I I A PPENDIX A BACKGROUND DOCUMENTATION I� [1 111 [11 [ 1 [ ,1 I1 [1 1, 11 [1 EPA LCC Revised Regulations LI . 1 United States Office of Water EPA 816 -F -00 -029 Environmental Protection (4606) January 2000 Agency www.epa.gov /safewater •=EPA The Class V Rule A Quick Reference Guide for Regulators !' Title of Rule: Revisions to the Underground Injection Control Regulations for Class V Wells 64 FR 68545 - 68573, December 7, 1999. Purpose: Prevent contamination of underground sources of drinking water by limiting injection of wastes through Class V wells. General Description: Adds requirements for two sub - categories of Class V wells: large- capacity cesspools and motor vehicle waste disposal wells. Links Class V program to source water assessment program. • I1 Rule Requirements Large- capacity cesspools Motor vehicle waste disposal wells Definition: typically dry wells that receive sanitary waste from multiple Definition: receive or have received fluids from vehicular repairs or dwellings and community or regional establishments. maintenance activities, such as auto body repair, automotive repair, car ' dealerships, or other vehicular repair work. • New large- capacity cesspools banned nationwide as of April 5, 2000 New motor vehicle waste disposal wells banned nationwide as of • Existing large- capacity cesspools closed by April 5, 2005 April 5, 2000 Existing motor vehicle waste disposal wells banned in regulated • Owners or operators notify the UIC Program Director 30 days areas. States may allow owners and operators to seek a waiver prior to closing their large- capacity cesspool from the ban and obtain a permit. (' Owners or operators notify the UIC Program Director 30 days prior to closing their well • • Minimum permit requirements for existing motor vehicle waste disposal wells 1. Fluids must meet Maximum Contaminant Levels (MCL) and other health -based standards at point of injection. 2. Best Management Practices must be specified. 3. Monitoring requirements must be specified to characterize the quality of the injectate and sludge, both initially and on an ongoing basis. ' Requirements for existing motor vehicle waste disposal wells would be phased -in as follows: First - in source water protection areas for community and non - transient non - community water systems that use ground water as a source of drinking water. These areas are being delineated and assessed as required by 1453 of the Safe Drinking Water Act and are called ground water protection areas. Second - in other sensitive ground water areas that States identify as being crucial for protecting underground sources of drinking water. These areas may include areas overlying sole source aquifers, karst aquifers, or other sensitive or vulnerable hydrogeologic settings such as glacial outwash deposits, eolian sands and fractured bedrock. If a State does not complete its assessments for ground water protection areas or delineate other sensitive ground water areas by January 1, 2004, the ' rule requirements apply statewide. .1 More Revisions... • -, ® Changes to the UIC regulations New or modified definitions • Consolidates Class V requirements into Subpart G • Point of injection • Improved sinkhole • Reclassifies Class V radioactive waste disposal wells that inject • Septic system • Sanitary waste below the lowermost USDW as Class I wells. • Drywell • Well . • Allows States to rule authorize Class IV wells used for CERCLA • Subsurface fluid distribution system • Well injection .and RCRA cleanup sites. 1 Implementation Schedule For States and Regions For Owners and Operators 04/05/00 Effective date of the rule. New large- capacity 04/05/00 Effective date of the rule. New large- capacity cesspools and new motor vehicle waste cesspools and new motor vehicle waste I disposal wells are banned. disposal wells are banned. 12/29/00 All complete primacy revision packages 04/05/05 Close all existing large- capacity cesspools. submitted to EPA. 04/05/00 Close motor vehicle waste disposal well or Ongoing Assessments completed in ground water comply with permit conditions within one year protection areas and rule implemented in these of the completion of local assessment for a I I areas within one year after local assessments ground water protection area. are complete. 01/01/07 Close motor vehicle waste disposal well or 01/01/04 All assessments for ground water protection comply with permit conditions in other I areas* completed and other sensitive ground sensitive ground water areas.** water areas ** delineated. 01/01/05 Rule implemented in all ground water 1 protection areas.* 11 01/01/07 Rule implemented in other sensitive ground 1 I water areas.** 4/00 1/01 1/02 1/03 1/04 1/05 1/06 1/07 1/08 I i I' States complete assessments of ground - • water protection areas and delineate other If assessments of ground 7 0/o in other sensitive sensitive ground water areas ground water areas must water protection areas are comply by 1/2007 (may 1 not completed', rule applies statewide receive one year extension) 1 o/o in ground water protection areas must comply in one year (may receive one year extension) _. o/o statewide must comply by 1/2005 (may receive one year extension) If other sensitive ground water o/o statewide must comply by 1/2007 areas are not delineated", s- (may receive one year extension) rule applies statewide II State may receive one year extension if making reasonable progress in completing assessments. States must apply for extension by 6/2003. 11 States receive extension but do not I , complete assessments by 1/2005, rule applies statewide and o/0 must comply by 1/2006 pay receive one year extension). "State may receive one year extension if making reasonable progress in delineating other sensitive ground water areas. States must apply for extension by 6/2003. If States receive extension but do not complete delineation by 7/2005, rule applies statewide and o/o must comply by 1/2008 (may remit receive one year extension). ,1 (U - - - - - - - - - -- - - - -- - .1 1 1 I I _ ! w8J ! ; a ° 1. . f t �/ ) Alt: ) Al . f . ; ! 2 { \ • !. . \ ; . . • \ § ( ) 1 , G `t j ! ) \ \; _ 6: v° ! i \ §! S | ! ! ,; ) } \ ! / \\I !) ! [I E - ! ;UAi |){` \ } h. `t\ . ` . ! ! " ;; . -)! i I ii !!. . . ` \ } |} ; e, , ! q 5 t, j} i 2 i ! { • ; ; ) :, _ ;!,!I . ! ,, ..,, [ hi .t1 . . \ \\ ! § \2 \ az \� .� . .... ,.. ! ! ; i, i __ : ` ! 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' `s ei al °:1 � _ .° a8 g ;8. �4L 5 a ° 7 ° e -2, a i g i s is 5 H 1!" 1: ! ■ Y 87:35 fr112".7 'c 2A e 7 y a s 2 E 5: 5E 1 3 S ^ ' aH 7e 2 . ai 5< ' .., 5f 8 " '.�d 7 ;E g' CSVS :G.: SiE 4g G ° fi e 521" b. 85 Al 7 a S : :4- s 12. 2 '1 4 52 5T'', 7 5, .� . 2 :5 e 5 : I d: ` 1 4 , !I II 1 1 11 1$ 1 1;. 1 1 3 t tt: 11. '.1 1 1.1 11 1.1 11 '1 (1 1.1 i1 11 1 Kilohana Subdivision HOA Letter to County 1� 11 I1 i1 !1 �1 1 From the Kilohana Homeowners Association I ', To whom it may concern, Kilohana subdivision maintains a wastewater collection and disposal system 1 1 installed in the utility easements throughout the subdivision. There are eight large capacity cesspools located in the easements and 79 lots in the subdivision, 31ots are vacant. Three homes built. after 1991 were not permitted to connect to the association ( 1 system and were permitted with individual cesspools. Along the makai side of Mahuahua, six homes have been permitted to construct individual cesspools on their lots and so far 3 homeowners have paid to construct their own cesspools with the association paying for the permits & engineering. There are 3 permits outstanding. There are currently 70 lots still served by the association wastewater system. A federal 1 I mandate requires the association to be in compliance with new wastewater treatment standards by April 2005. This mandate forces the association to modify the usage of wastewater wells so that no more than two homes are served by one cesspool. I Options ' A. Allowing two homes per each of the eight existing cesspools, the association could construct twenty-seven additional wells to satisfy the requirement. This would mean two adjacent homes sharing one disposal well. This option may represent the lowest potential cost to the association and the 70 affected homeowners, but all 79 homeowners & lot owners ultimately are joined together in this liability. 1' B. Allowing two adjacent homes to use the eight existing wells together, the remaining 54 homeowners could elect to construct their own wells individually. 54 versus 27 wells is not expected to be more cost effective than option A. C. The association could install large septic tanks ahead of the eight existing large capacity cesspools, thereby reclassifying them as injection wells. This option I requires tanks larger than the existing easements would permit, however, and is not a practical alternative. Using the existing cesspools as primary wells, second wells could be constructed to receive the clarified effluent and relieve potential overfill as ( , described in the engineering plan by Austin, Tsutsumi & Associates in 1985. D. Kilohana subdivision may connect its existing community association wastewater collection and disposal system to the county municipal sewage network as I envisioned by the original wastewater plan for Kilohana subdivision which provided utility easements for and brought most wastewater lines to Kupuna Street for the eventual extension of the county sewer line up Kupuna Street. This option depends 1 1 on the County of Hawai'i extending a sewer line from the Ali'i Drive force main to the II top of Royal Poinciana and up Kupuna to the Kilohana boundary. The cost for the association portion of this work is undetermined and assurances from the county to extend the sewer line may or may not prove out in time to satisfy the federal mandate. The Kilohana community association has agreed to pursue the establishment of a special improvement district for this purpose. 1 ■ , 1 I 11 ' Beginning at sewer manhole #1 -A in the sidewalk at the South corner of the Kupuna Street - Halal Place intersection, a gravity flow sewer main will need to be installed down Kupuna Street below the existing 8" water main, to the Kilohana boundary at lots 52 and 53. Sections of the improved system will require pumps and low- pressure force mains to deliver wastewater from existing collection wells to the new gravity flow sewer main buried beneath Kupuna Street. The pumps will be below grade in the collection wells and the low- pressure lines will route along existing utility easements before connecting to the Kupuna gravity main. On Mahuahua, where 3 homes have been retrofitted with individual waste wells, the waste lines, which connected them to the system, are being preserved and will be restored once the Kupuna gravity main is operational. When county sewer lines extend to any subdivision, all homes are required to abandon their individual waste wells or septic systems and connect to the county line. f The Department of Health, State of Hawaii issues approvals for waste wells and septic' systems. Because Kilohana subdivision was incorporated prior to 1991, individual wells serving no more than two homes are currently permitted. Pending 11 the Governor's signature, a new regulation will prohibit any new construction of this form of waste disposal without a variance. After the new regulation is signed, the Department of Health will only permit individual septic systems with tanks and leach fields unless a variance is granted. Variance granting is an uncertain process. County sewer extensions are an uncertain process. The federal mandate is certain. The association may appeal to Congressman Ed Case to ask Congress for an exemption from the federal mandate extension of the county sewer line. This appeal has most merit when joined with the association's dedicated effort to undertake the special improvement option D, but its outcome is uncertain. The Health Department will issue a general permit to construct waste wells as needed by the association based upon one of the permits approved for the six Mahuahua wells, provided the same engineer who designed the original plan continues to oversee all subsequent plans, permits and construction for each actual well installed. This approval, however, allows only 12 months to construct all wells and is not extendable. The homeowners assembled at Kona Outdoor Circle on February 12, 2003 voted to apply for such a permit. At the meeting, the representative of the Health Department indicated that no time limit applied to this permit and that the association would have until 2005 to complete the work. Since this meeting, this representative has been required to withdraw the no time limit provision after consultation with Department of Health administrators. 11 In the event the new Health Department regulation is signed into law by the Governor, the Health Department may grant a blanket variance to the Kilohana homeowners association to construct individual or dual use waste wells. There is 1 no guarantee that this variance will be granted. As the lots in Kilohana were sized without provision for individual waste wells and designed to connect to the municipal 1 sewer line when it arrives, it is impossible for many lots to accommodate either well or septic system with leach field. In this contingency a variance is the only viable option. ff 2 The Health Department answers to the Governor and the association may appeal to the Governor to consider the particular facts Kilohana homeowners are able to develop in preparing to satisfy the federal mandate.. In particular, the need I , to allow adequate time beyond the 12 months the Department of Health is willing to allocate once it issues a permit to construct wastewater wells: To research, engineer and effect a satisfactory construction schedule for 27 additional: wastewater wells in a planned community specifically removing them from individual lots at the outset, without disrupting or undermining the effort by the association to satisfactorily investigate, pursue and effect the connection of Kilohana's wastewater system to the county sewer network, should it materialize in the federally mandated time frame, it is imperative that the process not be hobbled by artificial time constraints which I I threaten to bankrupt the association and its homeowners, requiring them to invest in a double taxation temporary maneuver. Do we build 27 new wells and connection lines or do we build the Kupuna gravity sewer main and connecting lines? Should we be I required to build`: both or should we not be required to build either? The Wastewater Division of the Hawaii County Department of Public Works answers to the Mayor and the association may appeal to the mayor to consider how the (( f' gravity of Kilohana's situation threatens the well being of all inhabitants of Kilohana and the surrounding subdivisions. For the county to insist that Kilohana ante up to connect itself to the county sewer network is less than forthcoming to the particular { I realities confronting Kilohana homeowners. Will, for example, the county require all 1i the homeowners in Ali'i Kai subdivision to ante up and create a special improvement district to pay for the Royal Poinciana gravity main or the laterals up and down the 1 1 Side streets Will ifie homeowners ofKamaiu Trees be required - fo do likewise? The homeowners of'.Komohana? The homeowners of Sunset of Vistas, of Kona View Estates, and on and on? The County of Hawaii entered into a contract with the federal government when it accepted multimillion federal dollars to construct the Honokohau sewage treatment plant, the pumping station at Kuakini & Ka'iwi, the I Ali'i Drive force main and associated pumping stations. Hawai'i County agreed as a condition for receipt of these federal improvement dollars, to connect existing ti dwellings to the sewer network. fl " It's the county's responsibility to issue bonds to satisfy its obligations made part of its receipt of federal dollars we taxpayers provided. It was envisioned at the outset of Kilohana that one day the sewer line would come and we would be ready to I I connect without digging up all our streets. We are the only forward thinking community in the area, the only one ready to connect itself to the county sewer network yet we were told by the county wastewater representative at the meeting of the homeowners at Kona Outdoor Circle on February 12, 2003 that we skimped and benefited by not building individual cesspools like the other subdivisions in order to save development costs, that now we have to pay for that cost cutting by the developer. This is not true. Kilohana stands ready and willing to connect. Our sewer lines are in place. Install a county sewer line and we are good to go. We do not need to tear up all our side streets or contend with that expense. 3 i 1 1 Questions How realistic is the expectation that the county sewer line will extend to Kilohana in time to satisfy Kilohana's obligations under the federal mandate? The likelihood is not adequate to offset the known risks. Should Kilohana homeowners: risk their homes in a wager that relies on performance byHawai i County? All prior evidence indicates such a wager carries enough risk to warrant alternative or parallel remedies also be pursued. Should Kilohana homeowners commit to build an expensive temporary patch to 1 satisfy a federal mandate attached to the county's receipt of federal dollars spent to establish a sewage treatment network, only to abandon it when the sewer line is built? Only after careful thought, wise planning and an abundance of cooperation from all levels of government. Should the county take out general obligation bonds to satisfy agreements it entered into upon receipt of federal dollars for the sewage treatment plant and force main network and extend its sewer line up Kupuna to Lako Street? Unquestionably. Can Kilohana homeowners sit back and let this play out? There is no substitute for hard work and perseverance. Homeowners must prepare and act together, 11 restraining the temptation to strike out on their own and "solve" the problem individually. As members of the homeowner association, like it or not, we are all obligated to pursue our common best interest. Does this mean the homeowners should act to obstruct individual homeowners who decide to go it alone and construct individual wastewater wells on their property? 1 Answer: Not at all, any homeowner disconnecting from the association system relieves the association's expense of including that particular lot in whatever temporary remedy the association may be required to effect pending the county sewer line connecting to Kilohana. That many homeowners physically cannot construct individual waste wells on their already improved property is the reason we best serve ourselves by sticking together rather than falling away on separate paths. The surest course to follow is the best thought out one, not necessarily the most expedient. Will the Kilohana wastewater collection system as currently installed successfully connect to the county sewer line when it extends up Kupuna Street? Yes. Should Kilohana refrain from investing in a stopgap expensive fix and request all authorities respect the property rights of Kilohana homeowners by granting them a waiver of the time- imposed mandate they reconstruct their existing wastewater system to a temporary higher standard than existed when first approved? Yes. How then can Kilohana expect to convince the county, state and federal authorities having jurisdiction over these matters to allow Kilohana to continue operating its wastewater system until the sewer line extends through Kilohana? Answer: by providing copies of the engineering studies performed prior to and subsequent the construction of Kilohana subdivision, showing good faith in dealing with inadequacies found in the system, applying constructive solutions in the form of new waste wells as required, prolonging the life of our existing system until the 111 county meets our ready, willing and waiting sewer system with their own. 4 1 P. ris- + Y °K° sratEr r O 0. q�' _ GU.. '1 w sc (Otis` Jj 0 ! ..d y ! n i e c O : 8 } i O < :, I : , as {" 11 ♦ 4 14 1 ° O ° ;;31= �": i ir3.: Pc" 1`c 11 f l I .*S / \ 14 ..4 Sc‘ ®W ' ,. Jill. ^n!+ 1 I ^ �'0� y 1:p .:(,.• .k C S I _ • 4!I VI I i? ' . ;) F ` a r c ° i e ^' tat S li r "? ;1 ` F: 14 7." (1 � .. ° Cy 4... i ^: a 1.14 Y ; : � P ^ it O . ,0 <. O 4 0. ' O 11 I I f Yti i3a + : l iY 14'(1414 1 1. I\ A � , m \ 4 , Or - \ t ' VriT ° 3 . • t • a # 4 I I Y I • V .. 0 ( ` n Y ., �''� h x � I 40 'r$ I r < -- le y � '' ° n; S ° otS h x3 t 1 / Etta • ®< O wt i a© ,4:. (• e Q `.1 3 ` O - M1 t i I! 4 7) ni m e 1 I 8 1 � ( OS.V k x Y j 1 ^ " u t 7 .. l �, ° r , luA k l ,v'•,1 e j nA4 11 , e • P J i, mA O 4 V I b n p: °„ a ,t'Y!`!. - / ; I I war O ttt', in 1 0 p �' / fit a k 4.0 '4 �II II a . K ' +i l,l I` ['0� 1 ^I ■ 1 � r r A✓ a t. . ... O v A e e 4 d 4 O` $ 91I e41 w I ' 4 e 4° " O NY 4 P1 E t 4' f h ` ml1 ' , j l:i ? e . ,, IA' J 2 III o i t z a , 11 i1 1 (1 i1 11 I1 II !1 1 County Resolution (1 i1 i (1 !1 ' pV� O` M� William Takaba °• It Director Harry Kim " -- " — ' Harry Mayor � � "� s� �/ i ds% N ancy E. Crawford _ ,, Deputy Director 1, County of Hawaii i I Finance Department o 25 Aupuni Street, Room 118 • Hilo, Hawaii 96720 s (808) 961 -8234 • Fax (808) 961 -8248 L ) T 0 n S February 5, 2004 CT) Honorable James Arakaki, Chairperson and ' - - o t_ Members of the County Council =�, i Hawai'i County Council no C rn �' 25 Aupuni Street ^' Hilo, Hawaii 96720 u-1 Re: A Resolution Relating to a Council Initiated Improvement District Implementation Study for the Construction of Certain Wastewater and Sewer System Improvements for Holualoa, District of North Kona, Hawai'i ' The US Environmental Protection Agency (EPA) has promulgated Underground Injection Control ff regulations on December 7, 1999 which require that large capacity cesspools existing prior to that date must be upgraded or closed by April 5, 2005. The Kilohana Homeowners Association has �, requested the assistance of the County in its efforts to comply with the EPA regulation and connect to the County sewer system. The subdivision was constructed. with eight large capacity cesspools. Pursuant to the Hawaii County Code, Section 12 -10, titled "Initiation by council; study of proposed. �' improvement; adoption of improvement hearing." it- states that "The council shall, resolution requiring not more than one reading for its adoption, direct the chief engineer, or the manager in the case of a water system improvement district, to prepare and submit to the council a report" 1 , Enclosed is a resolution to authorize a Council initiated improvement district implementation study for wastewater and sewer system improvements for Holualoa, District of North Kona, Hawaii. +' If there are any questions, please do not hesitate to call the Department of Environmental. Management. (1 tTaaba Director of Finance c APPROVED: I OW Harry Kim Mayor No. Std f Comm, {' Enc. kes , iS�r U`F Ref. Tel f L Ref. Dote FIR fi 711P cc: Environmental Mgt 1 • firm #: B -52 1 8/91 DEPARTMENT OF FINANCE REQUEST FOR COUNCIL ACTION DEPARTMENT: Environmental Management, Wastewater DATE: 02/05/04 I TAFF CONTACT: Barbara Bell PHONE: 961 -8083 A. REQUEST: A resolution, pursuant to Section 12 -10 of the Hawai'i County Code, relating to a Council initiated Improvement District Implementation Study for the construction of certain wastewater and sewer system improvements for Holualoa, District of North Kona; Hawai'i. I Lt. BACKGROUND AND JUSTIFICATION (USE ADDITIONAL SHEETS AS NEEDED): C' The US Environmental Protection Agency (EPA) has promulgated Underground Injection Control regulations on December 7, 1999 which require that large capacity cesspools existing prior to that date must be upgraded or closed by April 5, 2005. L' The Kilohana Homeowners Association has requested the assistance of the County in its efforts to comply with the EPA regulation and connect to the County sewer system. The subdivision was constructed with [ . eight large capacity cesspools. Hawaii County Code, Section 12 -10, titled "Initiation by council; study of proposed improvement; adoption of r improvement; hearing," states that "The council shall, by resolution requiring not more than one reading for LI its adoption, direct the chief engineer, or the manager in the case of a water system improvement district, to prepare and submit to the council a report." LI `- ,SIGNED: /a a � Y-tisr m- DATE: Z O¢ Department Head COUNTY OF HAWAI`I,,, y S'TATE OF HAWAII � 1 RESOLUTION NO. 158 04 it A RESOLUTION RELATING TO A COUNCIL INITIATED IMPROVEMENT DISTRICT IMPLEMENTATION STUDY FOR THE CONSTRUCTION OF CERTAIN WASTEWATER AND SEWER SYSTEM IMPROVEMENTS FOR HOLUALOA, DISTRICT OF NORTH KONA, HAWAI'l WHEREAS, the Council of the County of Hawai'i wishes t� initiate proposed improvements on certain real property located at Holualoa, District of North Kona, County and State of Hawaii for improvements consisting of an extension to the municipal sewer system, pursuant to the provisions of Section 12 -10, Hawai'i County I Code, as amended; and WHEREAS; the US Environmental Protection Agency (EPA) has promulgated Underground Injection Control regulations on December 7, 1999 which require that �,.. large capacity cesspools existing prior to that date must be upgraded or closed by April 5, 2005; and 1 1 WHEREAS, the "Sewer Policies" outlined in the General Plan states, in part: • "Private systems shall be installed by land developers for major resort and i l other developments along shorelines and sensitive higher inland areas, II except where connection to nearby treatment facilities is feasible and compatible with the County's long -range plans, and in conformance with 1 state and county requirements. • The County shall take immediate steps to designate treatment plant sites, sewerage pump station sites, and sewer easements according to the facility plans to facilitate their acquisition. • The County shall seek State and Federal funds to assist in financing the 1 construction of proposed sewer systems." and WHEREAS, in its assessment of the projected sewage flow for the Kealakehe 1 1 • Wastewater Treatment Plant, the "Kailua -Kona Facility Plan Southern Zone" prepared for the County of Hawaii Department of Public Works dated November 1981 identified the area generally makai of Kuakini Highway between Kailua and Keauhou as the • planning subarea for population projections; and 1 J1 11 I 1 WHEREAS, the Kilohana Homeowners Association has requested the assistance of the County in its efforts to comply with the EPA regulation and connect to 11 the County sewer system; and WHEREAS, the Council of the County of Hawai'i acknowledges the need to 1 implement improvements consisting of an extension to the municipal sewer system on certain real property located atHolualoa, District of North Kona, County and State of Hawai'i; and a WHEREAS, extension of said improvements will include, but not be limited to, necessary gravity sewers, manholes, and sewer laterals with cleanouts to be installed to 1 each property serviced by the proposed improvements; and WHEREAS, the Council finds that a number of options may be chosen for the I allocation of costs of sewer system improvements, including, but not limited to: distribution of sewer improvement district costs by parcel, allocation by zoning or permissible number of units assigned to each parcel, potential usage, required sewer I I capacity, square footage of buildings, benefits conferred upon the land, or a combination thereof; and `1 WHEREAS, the allocation of costs associated with said improvements and the preferred financing thereof may best be determined after the scope and timetable(s) of intended development, including incremental development, of all affected landowners 1, are surveyed, and all landowners are consulted within a regional planning process. NOW, THEREFORE, BE IT RESOLVED BY THE COUNCIL OF THE COUNTY OF HAWAII that: �' (1) in consultation with the landowners referenced above, the Director of the Environmental Management is directed to prepare for submission to the Council a specific and detailed implementation plan for an improvement district to include the necessity, feasibility, proposed boundaries, proposed [ 1 real properties subject to assessment, estimated total cost, and method of financing desirable for the aforementioned sewer system; and ( (2) include in the specific and detailed implementation plan all such data, survey, 1' maps, plans, drawings, details and specifications for the improvements and any other matters or details intended to apply thereto in accordance with the 1 provisions of Section 12 -10, Hawaii County Code, as amended; and (3) advise the Council as to the preferred method of financing said improvements, whether by Council- initiated improvement district, owner- (, initiated improvement district, tax increment district, or private financing. (_ 1 ( 1 I .1 BE IT FURTHER RESOLVED that the Clerk of the County of Hawai'i transmit I copies of this resolution to the directors of the Departments of Finance and Environmental Management, and the Environmental Management Commission. 11 1 .1 Dated at , this day of , 2004. 11 Introduc By: 1.1 i 111 Council Member, County of aw. 11 11 1 I 1 -1 C1 [1 COUNTY COUNCIL ROLL CAL L VOTE County of Hawai`i AYES NOES ABS EX Hilo, Hawaii ARAKAKI [-� CHUNG I hereby certify that the foregoing RESOLUTION was by ELARIONOFF The vote indicated to the right hereof adopted by the COUNCIL of the HOLSCHUH County of Hawaii on . JACOBSON REYNOLDS 1 ATTEST: SAFARIK TULANG TYLER 1.1 Reference: • C- 503 /FC COUNTY CLERK CHAIRMAN & PRESIDING OFFICER RESOLUTION NO. 158 04 1 \\ , _ WASTEWATER DIVISION Ai . DEPARTMENT OF ENVIRONMENTAL MANAGEMENT v,�,, 108 RAILROAD AVENUE - HILO, HAWAII 96720 Y (808) 961- 8338- FAX (808) 961 -8644 I' MEMORANDUM: • DATE: February 27, 2003 TO: Mayor Harry Kim I 1 THRU:. Barbara Bell, Director of Environmental Management FROM: Peter Boucher, Division Chief Gt (, SUBJECT: Kilohana Large Capacity Cesspools As you may be aware, the EPA has required that use of all large capacity cesspools shall be l t discontinued by 4/05. The Wastewater Division has two of these systems, which we are proceeding with plans to connect to the County system. 11 The Kilohana Subdivision is located in Kona midway between.Ali'i Drive arid Kuakini Highway, near Royal Poinciana Drive. This subdivision was constructed with eight large capacity cesspools serving the approximately 80 lots. The subdivision community association is now (' faced with the same 4/05 deadline as the County to discontinue use of these cesspools. In an effort to assist the property owners, a meeting was held on 2/12/03 to explain the EPA requirements and describe options available to the community in order to comply with the EPA requirement. I was representing the County and Marshall Lum was representing the Dept of Health Wastewater Branch. - II Essentially the options available were: • Replace large capacity cesspools with individual wastewater systems • Upgrade large capacity cesspools with septic tanks � . • Install small wastewater treatment plant • Connect to county system Each of these alternatives had advantages and disadvantages, but the strong consensus among those at the meeting was that connecting to the county system was the best solution. I told the association that one possible way to do this would be for the community to create an improvement district to finance modifications to the sewer system within their own community and the County could potentially extend the municipal sewer to connect them. I did not promise them county assistance, but indicated that I would bring this to the attention of the Mayor to decide if the County wanted to partner with them. Please advise if this is something that you would want to consider. I am attaching a letter from f' the Community Association and notes from Marshal Lum outlining the available options from the DOH perspective. (' Kilohana Options to Replacing the LCCs: 1. Install a sewer line to connect to the County sewer line. A temporary line might also be ( 1 considered to convey sewage to the County line. A small diameter sewer system with lift stations could be used. 2. Individual cesspools on each lot. Variance needed after passage of revised HAR chapter 11 -62. 1 1 3. Individual ww systems (septic tank with leach field) on each lot. 11 4. Large septic tank installed upstream of the LCC. If no additional flows are added, UIC will issue UIC permit. However, if increased flows, no permit. I, 5. • Construct a wastewater treatment plant. DOH Clarification of Issues noted in Kilohana Homeowners Association Letter of 2- 24 -03: ' 1. Federal deadline is April 5, 2005. No EPA waivers or variances can be granted: I .' 2. DOH will approve a standard cesspool plan for a typical house to serve as an approval for the entire subdivision provided that the engineer agrees to work on the project up to final completion of construction of the cesspools. This plan would need to be approved by the (' DOH prior to the effective date of the revisions to chapter 11 -62. Otherwise, a variance would be needed if approval is requested after the effective date. (' 3. If approval is granted on the typical plan, DOH would consider a reasonable time request to construct the cesspools. •Obviously, five years to construct all of the cesspools in the ..:.. ... . subdivision is not reasonable. 4. Two houses connected to one existing LCC will only be allowed if the total number of bedrooms does not exceed five. If more than a total of five bedrooms will be connected by the two houses, a variance would need to be granted. If flows exceed 1,000 gallons per clay, it's considered by DOH to be a LCC. EPA concurs with this definition. L_ ' 11 I_i I1 I1 KILOHANA HOMEOWNERS ASSOCIATION [1 P.O. Box 114 Kailua -Kona, HI 96745 1 February 24, 2003 I_.,' Mr. Peter Boucher Mr. Marshall Lum Environmental Management 919 Ala Moana Blvd., Suite 309 E 1 Chief Wastewater Division Honolulu, HI 96814 108 Railroad Avenue Hilo, HI 96720 ( ' Mr. Joseph Reynolds Mr. Curtis Tyler South Kona District 70. North Kona District 8 77 -6399 Nalali Street, Suite 104 77 -6399 Nalani Street, Suite 104 i -' Kailua -Kona, HI 96740 -8980 Kailua -Kona, HI 96740 -8980 Mr. Ed Case District 2 Prince -Kuhio Federal Blvd. P.O. Box 5104 Honolulu, HI 96850 I Gentlemen: [I We, the Board Members of the Kilohana Homeowners Association, request that you please give us your consideration and help in resolving the sewer problem we face. [1 Please read the enclosed summary of the issues involved, and reply as soon as possible. Sincerely, f Dan Gibbons L 3 az,< < &S I Lona a�r,snr.� l -1 President Treasurer B"o$ -3zy k6ay 1 0/An Pat Lesher Margaret Br n Board Member Secretary [1 i1 1,1 �.1 1i [1 County 2001 Sewerage Service Map Li l.1 -2 - - - ---,--- -- I -. k 1 _Wcila,.:;1/2 -1;..1/2 i .7 !Lip - - - - • ,...-T, a aki \ lir ez, . . ) ) ,.4,.). 4:- ,.. - ..,_...4,........L.....4..,„._ D — 1 — — ;:. r z . I , /1 Afar.6. „4.a..- ,..,- to p. _ A /a I - 1111, .- 0 t+1 N .0 \ 1 1 _...1.,m, 14 1 tt i 4 In (.., 0 .0 0. -, L 1-:-;'5-'0- ,,...._,_ .. 0., .0 -7. - -1 1- Mtv;- -- •,--...,,,,"••••c -- I u= =, c`I.i I .:, . w w f 0 ,-9 0 wm I -ci . . .0 0 c i'- -- &tale 114-:. , , 4--;--• l ar 4., 1 - -r- --', N 1 ki if ..1 4: i".- Fli ^ - Q. , .-• .-1 3 3 1 ; ....,,.. iss ‘ w ra w ... z „, es N n1 (IS y „ tn p. 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I 1 , kat; 1 _ 1 1 i - --- \-1, I i , - z„•,, ..., e„, ; -„, i, , ,i' • -- ° -/ , si I 1 I , ,.. v- -‘,. ----/, v ` ,' 4 ' , N,/ -- .„ "L. , . i , 1 ; 1 1 i 1 1 1 I 11 II I1 I 1 [;1 [.1 CI I I County Roadway Improvements Listing I LI I.1 f_I 1 1 KEAHOLE TO KEAUHOU ROAD SYSTEMS & PROJECTS UPDATE 1 (County of Hawaii Projects, Unless Otherwise Noted - Status as of August, 2001) 1. Realignment/Redesignation of Some of the Major Roads in the "K -to -K" Region: The master plan for the Keahole to Kailua (K -to -K) region of North Kona calls for several new north /south arterial and collector roads. The proposals shown on the map suggest changes that slightly alter these roads due to archaeological, geographic and other features in the region. I 1 Land use planning documents call for this area to serve as a residential and commercial center for the region. The intent of the mapping is to establish roadway corridors and work with affected landowners to plan for these alignments in their respective future development plans. I .1 While still retaining three primary north /south roadways, there is realignment and shifting of the "Mid -Level Road" and a new alignment for "Main Street ". A recently updated traffic study supports these new alignments and designations. � 2. New County Civic Center in Kealakehe: The County has requested that the Governor issue an Executive Order to designate a property along Kealakehe Parkway as a Civic Center. Once granted, the County intends to move forward with the planning, design and construction of a new I_,1 County complex of offices and facilities on this site. The proposed site is makai of the water tank at the intersection of Kealakehe Parkway and the access 1 _1 road to Kealakehe High School (Keohokalole Highway.) 3. North Kona Municipal Golf Course: The Office of Corporation Counsel is working on canceling the prior agreement for a private developer to build a municipal golf course in North Kona. Once that prior agreement is terminated, the County will be seeking another developer to build a municipal golf course on land makai of the Kealakehe High School and north of the Kealakehe Police Station. f 1 4. Kealakehe Wastewater Treatment Plant Improvements and Related Projects: The County's Wastewater Division is pursuing Federal support to create a 'constructed wetland' at the County's Kealakehe Wastewater Plant. A goal is to provide additional wastewater treatment so that eventually the Kealakehe Treatment Plant will treat wastewater to "R1" quality. R1 quality wastewater can be used for irrigation. 1 Probable priority irrigation areas include the proposed Kona Municipal Golf Course and the Old Airport Park fields. Future plans include installation of irrigation lines along the wastewater easement from Kailua -Kona to the Kealakehe Wastewater Plant. These plans include opening the easement as a pedestrian and bike trail. 5. Pedestrian Pathway from Kealakehe Intermediate to Kealakehe High School: The County has requested that the State permit pedestrian access over a Water Department easement and other rights -of -way (all over State -owned land) connecting the mauka residential and school 1 community of Kealakehe Elementary and Intermediate Schools with the makai section of Villages of Laiopua and Kealakehe High School. • ' The pathway will be monitored and maintained by the PATH and Kealakehe Neighborhood Watch organizations. I.1 � .1 6. New Main Street and Service Roads North of Kealakehe Parkway: ' The proposed "Main Street" and service road alignments just north of Kealakehe Parkway, connecting with the road system in the Kaloko Light Industrial Subdivision, are patterned after circulation plans proposed in development plans for the affected property owners. Kamanu Street in the Kaloko Light Industrial Subdivision becomes "Main Street," (the service road proposed in the K -to -K Master Plan.) The alignments mauka and to the south of existing Kaloko Light Industrial Subdivision mirror landowners development plans. The extension of "Main Street" to the north of Nina Lani Street takes advantage of a road right -of -way I' reserve in the Kohanaiki Business Park. "Main Street" then extends north to Ka Imi Nani Street and on to ll serve the proposed University of Hawaii campus. (The slight jog just below Kona Palisade Subdivision addresses archaeological sites in the area.) 7. Holoholo Street (Kona Palisade and Kona Acres) Extension to Nana Street (Kona Coastview Subdivision) (Private): A private developer is proposing to connect Nana Street in Kona Coastview Subdivision with Holoholo Street in Kona Palisade Subdivision as part of its proposed development. In addition, two adjoining lots will be donated to the Kalaoa Community to be used as a regional volunteer f r fire station. 8. Hao Kuni Street - Kealakaa Street Connection: 1 _' The County is investigating the feasibility and practicality of extending and connecting Kealakaa Street and Hao Kuni Street. This is in the immediate vicinity of Hualalai Academy. 9. Kealakehe Parkway Extension (State): The first section of Kealakehe Parkway was completed by the State and runs from Queen Kaahumanu ( Highway to Keanalehu Drive. Previously, the State called for the balance of the road project, extending to Palani Road, to be completed as a single phase. Recently, the State agreed to split this remaining length of roadway into two phases: the first extending from its terminus at Keanalehu Drive to the elevation of the Kealakaa Street Extension, and the second, from that point to Palani Road. The Kealakaa Street extension to the north is one of the three north /south roadways that are part of the proposed K -to -K road system. 10. Queen Kaahumanu Highway Improvements (State): I-' The State Department of Transportation (DOT) has an island -wide number one priority to improve Queen Kaahumanu Highway from Kealakehe Parkway to Henry Street in Kailua. Improvement designs call for 1 - 1 widening to 4 -lanes with designated turning pockets and pedestrian walkways. Traffic signals are to be added at the intersection that leads to the Kealakehe Police Station /Kailua I Transfer Station. Construction is scheduled to begin in fiscal year 2003 -2004. In addition, State DOT has increased the priority of the planning phase for improvements to Queen Kaahumanu Highway /Kuakini Highway from Henry Street to Kamehameha III Road. 11. Palani Road Safety Improvements: The County Department of Public Works in working on plans to improve the intersection of Palani Road and Kealakaa Street. I_, .1 1 These intersection improvements have been identified by the County Department of Public Works, Kona Traffic Safety Committee and others as the highest priority for safety improvements along the Palani Road right -of -way. In addition, through a consultant, the County is investig g atin other areas along Palani Road to determine , safety concerns and priorities for improvement. 12. Heritage Corridor Improvements: ' In cooperation with Pulama la Kona Heritage Preservation Council and the Kona Historical Society, Hawaii County Departments of Public Works and Research and Development are investigating safety improvements on Mamalahoa Highway between its northern intersection with Palani Road and south �._ beyond Honalo. Contemplated action includes improved roadways and creation of turnouts; these should help the local I community, as well as support the Kona Heritage Stores in the mauka section of Kona. These general merchandise stores have been in business for over 50 years and continue to serve the community. (' 13. Hienaloli Road Extension: A new north /south roadway is planned to extend over the existing Hienaloli corridor from Hualalai road (at the south end) northward to intersect with Palani Road and continue to Keanalehu Drive in the Kealakehe _ I area. This alignment needs additional evaluation of archaeological, geographic and other physical features. (( 14. Hualalai Road Safety Improvements (County and State): I County and State agencies are looking to future improvements of Hualalai Road. The State is ( 1 considering realignment and intersection improvements with Queen Kaahumanu Highway (to align with LL the . proposed Kahului - Keauhou Parkway) and the County is considering improvements from Queen Kaahumanu Highway to the proposed improved Hienaloli Road and beyond. . 1 1 15. Kuakini Highway Safety Improvements: Kuakini Highway, from Palani Road to Hualalai Road, will soon be under construction to include various I safety improvements. The road will be widened to accommodate 2 -lanes of traffic in each direction, designated turning pockets, bicycle lanes in each direction and pedestrian sidewalks. 1 Improvements include synchronized traffic signals in this area. Ololi Road will be extended and opened i to Kopiko Street. Efforts will be made to retain the existing trees along the route. 16. Kailua Village Improvements: 1 1 The County has requested that the Governor issue an Executive Order to designate a property in Kailua Village for additional parking. The site adjoins the existing County parking facility and is situated between the Kona West Condominium and Emma's Square. 11 An unrelated proposal relates to pedestrian facilities fronting Emma's Square and the Kim Chong Building on Alii Drive. The area of existing rock walls is being considered to be converted to open, level 1 pedestrian and related use that includes the prospect of permitting adjoining property owners to use part I of this space for tables and chairs, much like other communities' sidewalk cafes. 17. Alii Drive - Oneo Bay Roadway Enhancement: 1 A County consultant is working on the planning phase of improvements to Alii Drive in the vicinity of Oneo Bay. Project specifications call for a pedestrian walkway to be cantilevered over the existing seawall, under - grounding of all utilities and other beautification features. The project runs from Bubba Gump's Restaurant to Huggo's Restaurant. I . 1 1., 18. Kahakai Road Safety Improvements: Kahakai Road is in Kailua Village and runs from Huggo's Restaurant at the north end to the Kona Reef Condominiums at the south. Several property owners have expressed safety concerns in this area. The County is discussing these issues with the property owners /users and is investigating various alternatives to address them. 19. Lako Street - Mauka and Makai Extensions (County and Private): 1 Developers of Kona Vista Subdivision plan to submit final drawings of their proposed development, including the mauka extension of Lako Street for County review. Included in the development will be drainage improvements in and around Queen Kaahumanu and above Royal Poinciana Drive. 11 Hawaii County Public Works Department is working on planning, design and eventual construction of the Lako Street extension makai to Alii Drive. Community meetings have been held and consultants are i 1 reviewing the findings and recommendations. I 20. New Mauka - Makai Connector - Kailua to Keauhou: 11 The County is discussing with different affected landowners the prospect of building another mauka- makai connector road from Alii Drive to Kuakini Highway between Kailua and Keauhou. 1I Initial discussions 'focus on the road system in the Keauhou View Subdivision development above La'aloa White Sands Beach Park connecting through neighboring properties to Kuakini Highway. 21. Kahului - Keauhou Parkway (The Parkway): I, The Parkway extends from Queen Kaahumanu Highway, in the vicinity of Hualalai Road, to the traffic signal below Keauhou Shopping Center. It runs generally parallel to Alii Drive. 11 Design characteristics of The Parkway include: a single automobile lane in each direction, bicycle lanes on either side, pedestrian sidewalks and landscaping. Intersections with mauka/makai connectors are typically roundabouts. Emphasis of priority for phased construction called for Phase I (from the north terminus with Queen Kaahumanu Highway to the Lako Street extension) to be constructed first. The present priority is now to work on Phase 2 first (from the Lako Street Extension to Keauhou.) The estimated $30 million for construction of this section of roadway is expected to be funded next fiscal year (2002 - 2003). 22. Kamehameha III Road Improvements: In anticipation of increased traffic along Kamehameha III Road, connecting Alii Drive in Keauhou to the mauka intersection at Kuakini Highway, County Public Works Department is investigating widening and other improvement issues. 11 A probable improvement design is to add an additional lane to the existing lanes and use it for peak -flow traffic on the roadway. 23. Alii Drive Improvements (Kailua to Keauhou): Several improvements are being considered for the Alii Drive corridor between Kailua and Keauhou. Restroom and shower facilities are being considered for Honl's and Banyan's surf spots at the County's 1 1 wastewater pumping stations. 1.1 1_I II Parking facilities are being considered for Honl's (moving the County's wastewater treatment pumping 1 1 station perimeter fence mauka to add on- street parallel parking,) Banyan's (possible acquisition of land mauka of the County's wastewater pumping station for use as a daytime parking facility,) Lyman's (additional grading, paving and fencing of the County's site for daytime parking) and La'aloa Beach Park (paving of the parking area at the park.) I' 24. Alii Drive Improvements (Keauhou Resort Area): The County is looking into improvements to Alii Drive in the Keauhou Resort area as they relate to the transition of the Kahului- Keauhou Parkway (The Parkway) to the north and the Mamalahoa Highway Bypass Road to the south. In addition to the transition details, traffic studies will help determine the capacity and design needs for this section of roadway as it relates to its role with these neighboring regional roads. I . 25. Mamalahoa Highway Bypass Road (Private): , As part of development requirements, the developers of the Hokulia project, at the North and South Kona districts' boundary, are required to build a Mamalahoa Highway Bypass Road from the Napoopoo Junction to Keauhou. Grading permits have been issued, acquisition of the road corridor is being finalized and construction will soon be underway. 1 1 Traffic studies indicate that one -half of the existing mauka traffic along mauka Mamalahoa Highway will use the bypass road when it is completed. 26. Mamalahoa Highway - Honalo to Captain Cook Safety Improvements: 1 Once the Mamalahoa Highway Bypass Road is completed, the County will initiate safety improvements along Mamalahoa Highway from Honalo to Captain Cook. Improvements include road widening, improved sight distances and other safety improvements. 1- 1 1I [_I 1 1. 1 1 [.1 1 t ; I' _L..J� '. ♦ l A n. • d r -- - , '.. o... ` ye x - • I l `t o bi rM co ol ti 4t!! . •j _ — - i t i\ molar. 4 _ + � � 1 { 1 . i' Ft aun 7) 1 ¢qt W 2 f ter(§ I [y 4, "' � . / ,may 1." y� 1 \ V r. ' it.; I' . s 're .: \''....-•," \ ,,,.:___- S: 1 • xoxoxoxAII � ,, \ % wY \ � r ` 4"4" WWALAxs ° E . - e � V� .� R N en Y a "- . M ia � n w r f M4 - Y „ -1 % - -la" : 4. ::::, .Rlittf.:Arti . ,.. .,„ W a , 1 w s F AILUA }V %' `� rraore a 4•d y . . __ :aetie'e"ld dIsti ow CI Sta r '� r pr' N4Y R 7"" ** i � • LEGEND nsa[wn.rroarn , i : . 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I I 484 Koldnikpm S treet, Ilite, HILO ENGINEERING inc. nAltellii 98720 PARCEL OWNERS AND TAX MAP i Isi;ir ' ,. .tr:_ 18 . 7 : 3,nRit -L 8( - 18c l e - s . ) : ALE,9 1-1 37 .4t 6 . 400 EMT 0 400 BC!, --- .1 D:LOAA;Q 73700704[ I L I PROPOSED i — I I DRAWING NO. 3 [ 1 r 1 [1 [1 [I [1 i1 [1 C1 [I DOH Cesspool Closure Guidelines and Forms Li [i [1 [I [I [I L1 1 ' 1 INSTRUCTIONS FOR f ' APPLICATION FOR BACKFILLING AN INJECTION -WELL CESSPOOL I, ( 1 STOP: This application form and method of backfilling an injection -well cesspool only applies to an injection -well cesspool that is not deeper than 33 11 feet and has received only sanitary wastes ( >1000gpd). For an injection -well cesspool that is deeper than 33 feet, an individualized application is ' required. Contact the UIC program at 808 -586 -4258. ' This one -page application form is the first step of a three -step procedure for backfilling and closing an injection -well cesspool. 1 First, fully complete the application form, and submit the application form to the Underground Injection Control (UIC) program with a $100 filing fee made payable to the State of 1 Hawai i. Government agencies are fee exempt. III Next, the General Instructions For Backfillinq An Injection -Well 1 Cesspool will be issued to you. Using the instructions, only a geologist or qualified professional engineer may self - determine ' the appropriate Method for backfilling an injection -well cesspool. Once the determination is made, the geologist or engineer is responsible for monitoring, assuring, and endorsing I 1 that the backfilling work was properly completed. t Lastly, a final completion report signed by the geologist or (1 professional engineer must be submitted to the Department of Health's Underground Injection Control program for file closure. For this requirement, use the Injection -Well Cesspool Backfillinq ( 1 Final Completion Report form that will also be issued to you. Read the final completion report form carefully before doing the backfilling work in order to understand what information to 11 collect /record. An unclosed file is subject to enforcement and corrective action. (1 Questions, please call the UIC program at 808 - 586 -4258 (Honolulu). [1 1/2005 ( 1 l,1 For Office Use: APPLICATION FOR BACKFILLING AN INJECTION -WELL CESSPOOL 1 Underground Injection Control (UIC), Dept. of Health, State of Hawaii 919 Ala Moana Blvd., # 308, Honolulu, HI 96814 (, STOP: This application form and method of backfilling an injection -well cesspool only applies to an injection -well cesspool that is not deeper than 33 feet and has received only sanitary wastes. For an injection -well cesspool that is deeper than 33 feet, an individualized application is required. Contact (' the UIC program at 808 - 586 -4258. f 1 Facility name: Island: ' Facility (cesspool) address: (_ 1 TMK: Type of facility: Cesspool owner (applicant): Phone: Property Owner: 1 1 Note: If the applicant is different from the property owner, the applicant is responsible and shall inform the property owner of this application and obtain consent. 11 Number of cesspools: Diameter: Depth: 1 1 Approximate gallons per day of wastewater per cesspool: Anticipated date of backfilling: Grd. Elevation: Cesspool is being replaced by: Provide on a separate sheet a drawing or sketch of the property showing the location of every injection -well cesspool. 1: i Person filing this application: ,_ 1 ❑ Is the owner. ❑ Is representing the owner. Printed name: Signed: 1 1 Title: Application date: i_. f Company: L_ I Address: Phone: if 1 $100 Filing fee to State of Hawaii: ❑ Attached, check # ❑ Not required, owned by gov. agency. I1 It me rit I I '� GENERAL INSTRUCTIONS FOR BACKFILLING AN INJECTION -WELL CESSPOOL (Department of Health, January 2005) Procedure: First, complete and submit the Application For Backfillinq ' An Injection -Well Cesspool, with a $100 filing fee made payable to the State of Hawaii. Next, using these instructions, only a geologist or qualified professional engineer may self - determine the 1 appropriate Method for backfilling an injection -well cesspool. Once the determination is made, the geologist or ' engineer is responsible for monitoring, assuring, and endorsing that the backfilling work was properly completed. ( Lastly, a final completion report signed by the geologist or professional engineer must be submitted to the Department of Health's Underground Injection Control program for file closure. For this requirement, use the Injection -Well Cesspool Backfillinq Final Completion Report form { ' (attached). An unclosed file is subject to enforcement and ( corrective action. t.. Backfillinq Objective: Proper backfilling indicates that the injection -well I.� cesspool has been properly cleaned out and permanently filled and sealed with an inert material having stability and physical strength. Furthermore, the injection -well cesspool's remaining profile should not ever serve as a preferential route for the infiltration /migration of fluids 1 1 into, out of, or between soil, sedimentary, or volcanic formations. In this regard, the backfilling should minimally reestablish the subsurface and ground back to its original condition. I ' INSTRUCTIONS: 1. These instructions only apply to an injection -well cesspool I that is not deeper than 33 feet below ground surface. For an injection -well cesspool that is deeper than 33 feet, an Page 1 of 6 ii i II , individualized application for injection -well cesspool abandonment must be filed with the Underground Injection Control (UIC) program. (See General Remarks, item f.) Site - specific backfilling instructions will then be issued by the UIC program. Injection -well cesspools that are deeper than 33 feet have an increased risk of adversely • affecting groundwater. (' 2. Before starting any backfilling, all sediments, sludge, debris, and organic matter in the injection -well cesspool should be removed and disposed of properly. The injection- ( 1 well cesspool should be cleared to its original constructed depth. I , 3. Determine the soil, rock, and formation characteristics of the ground in which the injection -well cesspool was built. Once this determination is made, select the most appropriate backfilling method from the five methods listed below. Use ( the method that best fits the ground condition of the t_, injection -well cesspool. METHODS: I. Ground Condition: Ground characteristics are not I ` known or not considered. Only one generalized backfilling method /specification is desired, regardless t - ' of soil, rock, or formation characteristics. Backfilling: Use a cement mixture. Cement mixtures 1 11 may range from cement /water (neat cement), to sand /cement (1 /1, 2/1, or 3/1), to concrete (1500, 2500 ff psi). Determining the appropriate mixture depends 1..� primarily on the diameter of the injection -well cesspool. Any diameter smaller than 12 inches requires neat cement. Emplacement of the cement mixture into l the injection -well cesspool is via the Tremie method (use of a tremie pipe), especially for emplacement (, below the water table. When a water table is not present, cement mixtures should not free fall more than 6 feet. Cement mixtures should have a water -to- cement 1_111 ratio of approximately 5 gallons, but not exceeding 6 gallons, per 94 pounds of cement (one sack). Page 2 of 6 1 1 II. Ground Condition: Lava formations: either.:a'a or pab' ehoe lava flows, dikes, welded tuff, or welded cinders, regardless of fractures, clinkers, or voids. ' Backfilling: Use a cement mixture as described in ( 1 Method I. If the injection -well cesspool does not encounter groundwater, a controlled low- strength material (flowable fill) may be alternatively used. I 1 The flowable fill should have a minimum strength of 500 psi. Emplacement of the flowable fill is the same as ( of a cement mixture under Method I. (_1 Cesspool diameters vary, but diameters may typically r1 range from 5 to 8 feet. The use of additional II appropriate inert aggregate materials, to help reduce the volume of the cement mixture, or the flowable fill, is possible. However, this method of backfilling must be closely monitored by the attendant geologist or engineer. Appropriate inert aggregate materials may (' include clean boulders and cobbles, certain types of smaller -sized aggregates, and clean concrete blocks from demolition. Aggregates must be appropriately sized, and emplacement of the aggregates with the cement mixture must not create voids due to bridging or 1 incomplete cement mixture filling. Emplacement of the inert aggregate should never rise above the cement mixture level. In other words, the cement mixture must L1 be . emplaced first in the injection -well cesspool to a minimum thickness of 2 feet, and aggregates should then ( 1 be carefully dropped into the cement mixture. The l cement mixture is continually added in order to keep the cement mixture level above the inert aggregate. III. Ground Condition: Consolidated material: either hard coral, cemented sand, in situ decomposed rock, tuff, or conglomerate. 1 Backfillinq: Use a controlled low- strength material (flowable fill). When a water table is not present, the flowable fill should have a minimum strength of 300 I .' psi. When backfilling below a water table, the flowable fill's minimum strength should be 600 psi. ( Page 3 of 6 11 «1 ", Emplacement of the flowable fill is the same as of a cement mixture under Method I. The use of appropriate inert aggregate materials, to help reduce the volume of the flowable fill, is possible, as described under Method II. IV. Ground Condition: Unconsolidated material: either soil, sand, gravel, loose coral, loose cinders, or (' alluvium. Backfilling: Use a material that is similar to the ' site's natural material. The condition of the injection -well cesspool, e.g., the dimensions, open- hole integrity, accessibility, standing water, etc., I , may affect the determination to use a site - similar material. The geologist or,engineer may elect to use a ' more stringent backfilling material, e.g., a cement mixture, in order to accomplish the job more efficiently and properly. When using a site - similar material, the material should ' in general be emplaced in one -foot layers and compacted sequentially to match or exceed the site's natural formation density. As an alternative to a site - similar I ' material, a controlled low- strength material (flowable fill) may be used. When a water table is not present, [11 the flowable fill should have a minimum strength of 150 psi. When backfilling below a water table, the flowable fill's minimum strength should be 300 psi. ' Emplacement of the flowable fill is the same as of a cement mixture under Method I. ' If a site - similar material is used to backfill inside an injection -well cesspool's casing, and if the casing's top is less than 5 feet below the ground i surface, then the inside top 24 inches of the casing must be completely filled with concrete, minimum 1500 (, psi. I V. Ground Condition: Regardless of the ground condition, 1 the injection -well cesspool is fully eliminated by excavation, i.e., the entire cesspool profile is 1 , Page 4 of 6 1 excavated away. 11 Backfillinq: Use a material that is similar to the site's natural material. The material should be 1 1 emplaced in layers and sequentially compacted to match _ or exceed the site's natural formation density. Local ( 1 soil engineering principles and practices should be used for backfilling, in full consideration of stability, strength, and safety objectives. 11 ' General Remarks: a. The Department of Health reserves the authority to conduct 1 1 quality assurance inspections at any point before, during, or after field work operations to verify that satisfactory I work and the proper use of methods and materials in I -,' backfilling an injection -well cesspool are being accomplished. Unsatisfactory work or the improper use of 1.1 methods or materials will be subject to enforcement and corrective action, which may include penalties for 11 violations. b. Hawaii injection well regulations are under Hawaii ' Administrative Rules, Title 11, Chapter 23, titled Underground Injection Control. ill Backfilling with a cement mixture or flowable fill may stop short of reaching the ground surface in order to accommodate top soil, landscaping, grading, underground utilities, or 1_1 foundation considerations. Stop -short depths should generally not exceed 4 feet. The remaining unfilled hole 1 .1 may be filled with soil. Stop -short depths do not apply in casings; casings must always be filled completely. 1 d. All backfilling methods should not leave behind a depression in the ground. The final ground surface should be shaped or 1 graded to prevent tripping or falling, as well as water ponding. e. When backfilling with a site - similar material, the geologist or engineer may use professional judgement and geotechnical Page 5 of 6 _ 1 I1 ' principles regarding the compaction method needed to achieve proper compaction. 1 f. For an individualized injection -well cesspool abandonment, the abandonment application form is available at www.hawaii.gov/ health / environmental /water /sdwb /uic /uicprogrm.html. I When applicable, the application fee is $100, payable to the State of Hawai'i. Project specific, written backfilling I I instructions are then issued to the applicant. The instructions will contain details about the backfilling work 111 methods, material, and reporting requirements. The backfilling methods and material under an individualized abandonment cannot be self- determined. 1 g. Questions about the general instructions may be directed to the Underground Injection Control program, Safe Drinking 1 Water Branch at 808 - 586 -4258 (Honolulu). [1 f1 11 [0 • I1 I_.I I , Page6of 6 . 1 [1 . LARGE CAPACITY CESSPOOL (LESS THAN1000 GPD) BACKFILLING FINAL COMPLETION REPORT Wastewater Branch, Dept. of Health, State of Hawaii [' Property owner: Project address: TMK: [1 (_ Number of cesspools, and numbering if any: ! ' Diameter(s): Depth(s): Was sludge /sediment or liquid removal necessary? ❑ Yes ❑ No Where was sludge /sediment or liquid taken or disposed of? I -' Was groundwater encountered? ❑ Yes ❑ No 1 Date of backfilling: Type of backfill material: f -. Amount of backfill used (cubic yds.): 1 .1 Was the cesspool completely backfilled? ❑ Yes ❑ No I _' How was it compacted? I Backfilling contractor: Please provide: I' • Pictures: Attach photos of the large capacity cesspool from step -back distances of approximately 8 feet and 20 feet. • Copy of this report to: LCC Project Coordinator EPA Ground Water Office (WTR -9) 75 Hawthorne Street San Francisco, CA 94105 ' I, Page 1 of 2 ( I (, LARGE CAPACITY CESSPOOL BACKFILLING FINAL COMPLETION REPORT (Continuation) Fl The backfilling work and the final completion report have been performed and completed under my supervision and the work was properly completed: ❑ Professional Engineer Include P.E. stamp: 1 . 1 Printed Name: [ 1 Signed: Date: I Company: ff I Address: Phone: Fax: ( FOR OFFICIAL USE ONLY - DO NOT WRITE BELOW THIS LINE 11 IWS file no: Date sent: • [1 Date received: (_I r 1 I Page 2 of 2 1 1 • [1 1.1 11 1 1 rI i [1 [1 11 [_I 1.1 11 [I APPENDIX B 1 HYDRAULIC CALCULAT IONS [1 rwail. ---- wig 0,0 N .> : i. 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Z F Q ]CIEICI]CI 3 J 3 El 0 0 0 0 o O c � 6 Q Z Q O 1 9 M O N N CO 0) G J ' Z O 11011:11111 O �, ®' N M N IL tii Ili j 'V 0 (O N V r r N � U o °= Q U D O ucucicriu ci iiriciciuiici S N F Q F ce a. �m z�Q y a i co ICIII 2 111®1 Q a @ E Q J C d ' 1'1'1 ' d �' ©' A r 01 r CO 0 CO CO N O Q C o f J FTC ? �1 ®' ®'�' ? �' ® ' J y y y y y y y tLL o W 1 IIIIIII 1 IiI 1 ! a ¢ ¢ ¢ .� . 0 d 11 . m V W O i O O m N N a LL O V y N m N d' I� V o] N O W c, Z — o o O O y O m M 0 (o ! m m o a r r to CO a N -~°J Q a d N O N N N N N 0 m co m ' r n m ^ m N n .r- to t- to I � I. �� — M N - ut o ° o o o d IL O O O N o o O O O O 1() O O N IJJ �- ui 6 m to 6 Il m m 0 m 6 ui 6 ui 0 0 - N 7 0) Z W O co O O O O ' O o ° ° O ° O O o o O N O O i0 O o O O O O O O LL J 6 r i V O N 6 'n a Q (O m V m u) U w ° o m n n m r m m n m in a N , 0) • F=- o 0 0 0 0 o 5 ! o a o 0 0 o 0 o a Y d Z F H N ` 6 O O O CaJ O N a O E a CU W IL N N N N N O ` CO N ,7 M d J - O N tn 0 1 Z N U 01 F- U Z r- O O o O N O O O O O O O O O 0 N w 1- o ° O n o O o v) O ° a o 1n to n E N > v Q 4 N O N O a r co o h 6 a N ^ Q ' Z m O M r ^ t0 cE V V m co co m w W K a [ :: N 0 a U . z m 10 m 0 -I 3 ' M w 0 r ^ f a O u, a o 0 ° Y U O W LL N N O O CO N N .0 O O O Z y LL LL r N tV r- N N Q N (O c 7 N (V N 0 r U d W S W W _ m _.... _. U 0 W Q i 7 y N M N O N N p m o N N V d S ` W O J d O N 0 N M N 10 N N O cc d LL; LL O N O rI r N t7 N 6 a 1.m d d o W J 3 o n m N co ^ CO W N V N o co E in co 3 O p <O a tD 0 0 O 7. Q 0 0 0 o Q W d d 0 ,- O ,_ � O O .- .- O O O M a e o a° a o ' e S o e o o a e O M : a n a '0 0 0 0 ( m a s a a M '0 m O N O O N Ci V p O O N 'n N N N 10 6 N m V] 10 10 N O O O O O O O O O p O o O O O O O O O O O ° O O O O W • d O i CO CO CO W w m CO CO CO CO CO CO co E M d 01 In CO m CO m a '0 (0 M ° Z 3 r a M N 0 N N (0 0 0 CO n 0 O ° 01 Ol o N N N CO 0 n DI 0 m CO J W 0 V c M CD y d LL co a N to N M a O N ( r a M N M V op O O _1 o ° ° 0 0 0 N LL d Q O N N r t f N 0 Ip O N m 0 O r 8 H. ar co <n U U LL O N M c v N m m v a tO n m n ° a Z 0 Q 0 U W V Y ' a 0 o 0 0 o 0 0 0 0 o O 0 o O o 0 0 ~ ' - N > O a m n n m . a - `° m n CO m o r N e 6 < .. 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LL LL LL LL Y O a 0 _ J F N m N N Z O m N O Z Q Y Y Y Y 0 O J to W r w ¢ Z+ Y h m Y n O 5 co j ` N. N Mr v.6 V . o. • 0 + ° m + MI al 2 IIIMI IIIN MI MO al 111111111 IIIIII I= MI , MI . IINI NM UM MN IN . MO OM !1 [1 IT1 1 11 Li • 11 [1 [1 1:1 (:1 (1 APPENDIX C 1 I PROBABLE CONSTRUCTION COST ESTIMATE 1.1 (1 I_# I ' PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT IMPLEMENTATION STUDY [ 1 Entire Improvement District Date: 12- Sep -08 Prepared by: AY 1 Checked by: • 1 ESTIMATE OF PROBABLE COST OF CONSTRUCTION Est. Qty. Unit Description Unit Price Total [_I MAIN COLLECTION SYSTEM $ 1,480,000 SUB -BASIN 1 - KILOHANA & KALANI MAKAI $ 310,000 SUB -BASIN 2 - ALII KAI (.' SUB -BASIN 3 - KAMANI TREE $ 2,220,000 $ 1,490,000 SUB -BASIN 4 - KOMOHANA KAI $ 3,010,000 11 11 [1 TOTAL $ 8,510,000 L1 1� 11 11 [1 11 1, 11 [_ 1 of 1 I' PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT 1 IMPLEMENTATION STUDY Main Collection System Date: 12- Sep -08 _' Prepared by: AY Checked by: _ ESTIMATE OF PROBABLE COST OF CONSTRUCTION I Est. Qty. Unit Description Unit Price Total ' 1800 SY Asphalt Pavement Demolition $ 10 $ 18,000 110 SY Concrete Sidewalk Demolition $ 20 $ 2,200 (, 2 EA Connection to Existing Sewer System $ 1,200 $ 2,400 LS Clean and Flush Existing Sewer Pipes $ 15,000 $ 15,000 3300 CY Excavation and Backfill (rock) $ 135 $ 445;500 1000 CY Crushed Rock $ 60 $ 60,000 1560 LF 6" PVC Pipe $ 17 $ 26,520 3140 LF 8" PVC Pipe $ 35 $ 109,900 ' 650 LF 10" PVC Pipe $ 40 $ 26,000 940 LF 12" PVC Pipe $ 45 $ 42,300 18 EA Sewer Manhole $ 5,000 $ 90,000 6 EA Drop Sewer Manhole $ 8,000 $ 48,000 58 EA Clean Out To Grade $ 500 $ 29,000 5 EA Lateral Reconnection $ 500 $ 2,500 3 EA Demolition of Existing Sewer Manhole $ 2,500 $ 7,500 1800 SY Asphalt Pavement Restoration $ 80 $ 144,000 _ 110 SY Concrete Sidewalk Restoration $ 25 $ 2,750 ' LS Temporary Bypass $ 10,000 $ 10,000 LS Temporary Erosion Control Measures $ 18,900 $ 18,900 LS Traffic Control $ 62,900 $ 62,900 1 SUBTOTAL $ 1,163,370 . . Mobilization (6 %) $69,802 I Contingency (20 %) $246,634 TOTAL $1,479,807 11 SAY $1,480,000 1 1 1 of 1 I_ i . I PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT I IMPLEMENTATION STUDY SUB -BASIN 1 - Kilohana & Kalani Makai Date: 12- Sep -08 I Prepared by: AY Checked by: I ESTIMATE OF PROBABLE COST OF CONSTRUCTION Est. Qty. Unit Description Unit Price Total I 1 450 SY Asphalt Pavement Demolition $ 10 $ 4,500 40 SY Concrete Sidewalk Demolition $ 20 $ 800 I' 10 EA Connection to Existing Sewer System $ 1,200 $ 12,000 LS Clean and Flush Existing Sewer Pipes $ 15,000 $ 15,000 475 CY Excavation and Backfill (rock) $ 135 $ 64;125 I 1 130 CY Crushed Rock $ 60 $ 7,800 320 LF 8" PVC Pipe $ 35 $ 11,200 600 LF 4" PVC Pressure Pipe $ 15 $ 9,000 2725 LF 2" PVC Pressure Pipe $ 10 $ 27,250 17 EA Check Valve & Box $ $00 $ 8,500 8 EA Sewer Manhole $ 5,000 $ 40,000 I 450 SY Asphalt Pavement Restoration $ 80 $ 36,000 -. 40 SY Concrete Sidewalk Restoration $ 25 $ 1,000 1 LS Temporary Erosion Control Measures $ 2,800 $ 2,800 1 LS Traffic Control $ 3,200 $ 3,200 I 1 SUBTOTAL $ 243,175 111 Mobilization (6 %) $14,591 Contingency (20 %) $51,553 TOTAL $309,319 SAY $310,000 LI I : 1 1 11 1 [ 1 1 of 1 ' PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT - IMPLEMENTATION STUDY SUB -BASIN 2 - Alii Kai Date: 12- Sep -08 Prepared by: AY Checked by: ESTIMATE OF PROBABLE COST OF CONSTRUCTION Est. Qty. Unit Description P Unit Price Total 4000 SY Asphalt Pavement Demolition $ 10 $ 40,000 400 SY Concrete Sidewalk pemolition $ 20 $ 8,000 5000 CY Excavation and Backfill (rock) 1100 CY Crushed Rock $ 135 $ 675,000 $ 60 $ 66,000 2825 LF 6" PVC Pipe $ 17 $ 48,025 3820 LF 8" PVC Pipe $ 35 $ 133,700 5070 LF 2" PVC Pressure Pipe $ 10 $ 50,700 26 EA Sewer Manhole $ 5,000 $ 130,000 113 EA Clean Out To Grade $ 500 $ 56,500 109 EA Check Valve & Box $ 500 $ 54,500 4000 SY Asphalt Pavement Restoration $ 80 $ 320,000 1 400 SY Concrete Sidewalk Restoration $ 25 $ 10,000 LS Temporary Erosion Control Measures $ 35,200 $ 35,200 LS Traffic Control $ 117,200 $ 117,200 (_I SUBTOTAL $ 1,744,825 Mobilization (6 %) $104,690 L ' Contingency (20 %) $369,903 TOTAL $2,219,417 SAY $2,220,000 1. ( 1 11 I_, 1 of 1 1 _. 1 PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT IMPLEMENTATION STUDY , SUB -BASIN 3 - Kamani Tree Date: 12- Sep -08 Prepared by: AY Checked by: I ESTIMATE OF PROBABLE COST OF CONSTRUCTION Est. Qty. Unit Description • Unit Price Total 1 2300 SY Asphalt Pavement Demolition $ 10 $ 23,000 150 SY Concrete Sidewalk Demolition $ 20 $ 3,000 ( - 3300 CY Excavation and Backfill (rock) $ 135 $ 445,500 . 1000 CY Crushed Rock $ 60 $ 60,000 2000 LF 6" PVC Pipe $ 17 $ 34,000 I I 4950 LF 8" PVC Pipe $ 35 $ 173,250 19 EA Sewer Manhole $ 5,000 $ 95,000 77 EA Clean Out To Grade $ 500 $ 38,500 1 1 2300 SY Asphalt Pavement Restoration $ 80 $ 184,000 150 SY Concrete Sidewalk Restoration $ 25 $ 3,750 LS Temporary Erosion Control Measures $ 26,600 $ 26,600 LS Traffic Control $ 88,500 $ 88,500 [1 SUBTOTAL $ 1,175,100 I Mobilization (6 %) $70,506 Contingency (20 %) $249,121 TOTAL $1,494,727 - SAY $1,490,000 I 1 1_' 1 I1 1 1 1I I 1 of 1 I' PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT IMPLEMENTATION STUDY I 1 SUB -BASIN 4- Komohana Kai Date: 12- Sep -08 Prepared by: AY 1 1 Checked by: ESTIMATE OF PROBABLE COST OF CONSTRUCTION I' Est. Qty. Unit Description Unit Price Total I _1 7000 SY Asphalt Pavement Demolition $ 10 $ 70,000 700 SY Concrete Sidewalk Demolition $ 20 $ 14,000 I 5000 CY Excavation and Backfill (rock) $ 135 $ 675,000 3500 CY Crushed Rock $ 60 $ 210,000 100 LF 6" PVC Pipe $ 17 $ .1,700 11 7200 LF 8" PVC Pipe $ 35 $ 252,000 1700 LF ' 10" PVC Pipe $ 50 $ 85,000 4400 LF 2" PVC Pressure Pipe $ 10 $ 44,000 I 1 45 EA Sewer Manhole $ 5,000 $ 225,000 250 EA COTG $ 500 $ 125,000 3 EA ARV $ 1,000 $ 3,000 I 1 142 EA Check Valve & Box $ 500 $ 71,000 7000 SY Asphalt Pavement Restoration $ 80 $ 560,000 700 SY Concrete Sidewalk Restoration $ 25 $ 17,500 I' LS Temporary Erosion Control Measures $ 40,200 $ 40,200 LS Traffic Control $ 134,000 $ 134,000 LS Land Acquisition $ 50,000 $ 50,000 I1 SUBTOTAL $ 2,577,400 II Mobilization (6 %) $154,644 1 1 Contingency (20 %) $273,204 TOTAL $3,005,248 L1 SAY $3,010,000 I1 . 1. 1 11 I.1 [1 1of1 • � `i, 3 . GOODW CONSU G R OUP :, 3 w M a s a , . a,c £ �?" ty a f 4# COUNTY OF HAWA I G z t A+ Y ': KILOHA NA SEWER IMPROVEMENTS FINANCING ANALYSIS April ", 2008 • . 3 ,. N. • 555 UNIVERSITY A VE. SU ITE 2 80 ^ SACRAMENi9 1— CA 9 5825 r "` i. PHON (916) 561 -0890 a FAX: (916) 56 1 —O County of Hawai `i Kilohana Sewer Improvements Financing Analysis Table of Contents Section Page I. INTRODUCTION 1 Objective 1 Project Description 2 II. COMMUNITY FACILITIES DISTRICT ANALYSIS 4 CFD Overview 4 CFD Financing for Kilohana Sewer Improvements 6 III. FINANCING ALTERNATIVES 11 Improvement Districts 11 Other Financing Alternatives 14 IV. CONCLUSION 15 APPENDIX: KILOHANA SEWER IMPROVEMENTS FINANCING ANALYSIS TABLES • I. INTRODUCTION OBJECTIVE Wastewater improvements in the Kilohana area currently consist of individual cesspools or large capacity cesspools, which potentially pose public health risks and environmental concerns. Cesspools allow untreated sewage to percolate directly into the soil and possibly into the groundwater. Regulations adopted by the U.S. Environmental Protection Agency ( "EPA ") in 1999 require that all existing large capacity cesspools be upgraded or closed by April 5, 2005. In many cases, private parties and public agencies have entered into a consent agreement and final order with EPA to extend this deadline. Residents in the Kilohana area requested assistance from the County of Hawai`i ( "County") to comply with the EPA regulations. Therefore, funding mechanisms must be established that allow development in the Kilohana area to pay for the required sewer improvements and attain EPA compliance. The Hawai`i County Code ( "County Code ") provides for a variety of mechanisms to fund public infrastructure, including community facilities districts ( "CFD "), improvement districts ( "ID "), and tax increment districts ( "TID "). Each funding tool involves different implementation procedures, protest requirements, authorized facilities, revenue sources, and security requirements. In 2004, the Council of the County ( "Council ") adopted Resolution No. 158 -04 directing County staff: (i) to develop a specific and detailed implementation study for an improvement district to fund the construction of a wastewater collection system for the Holualoa area; and (ii) to identify a preferred method of financing to fund the required sewer facilities. The County retained Engineering Solutions, Inc. ( "Engineering Solutions ") to prepare the necessary implementation study pursuant to Resolution No. 158 -04 ( "Implementation Study "). The Implementation Study identifies the sewer improvements necessary to serve development in the Kilohana area and addresses the feasibility, boundaries, estimated costs, and desirable method of cost allocation to provide the required sewer improvements through an ID. The County later retained Goodwin Consulting Group, Inc. ( "GCG ") to evaluate altemate financing mechanisms available to fund wastewater facilities required to serve development in the Kilohana area. GCG reviewed the Implementation Study and coordinated with County staff to establish or refine initial assumptions regarding land uses and infrastructure costs and phasing. This report presents the results of GCG's analysis. In particular, Section II of this report discusses the results of the CFD financing analysis. Section III describes alternative financing mechanisms available to fund the required sewer facilities, and includes an overview of the ID analysis conducted by Engineering Solutions. Finally, Section IV summarizes the overall results of the analyses and identifies the preferred financing mechanism to fund the required sewer improvements. Kilohana Sewer Improvement Financing 1 April 21, 2008 PROJECT DESCRIPTION The proposed Kilohana sewer study area is located on the west side of the island of Hawai` approximately five miles south of downtown Kailua Kona. Royal Poinciana Drive and Kupuna Street are the two mail roads traversing through the study area, linking Alii Drive to the south with Kuakini Highway to the north. The study area comprises the Alii Kai, Kamani Tree, Komohana Kai, Kilohana, and Kalani Makai subdivisions. A map of the Kilohana study area is presented in Figure 1. In all, the Kilohana area includes approximately 662 residential lots, of which only 33 remain undeveloped. TableI -1 below summarizes the land use data for the proposed Kilohana CFD. Table I -1 Land Use Summary Subdivisions Improved Unimproved Total Units Units Units Kilohana 76 3 79 Non - Kilohana' 553 30 583 Total 629 33 662 The non - Kilohana area comprises the Alii Kai, Kamani Tree, Komohana Kai, and Kalani Makai subdivisions. • Kilohana Sewer Improvement Financing 2 _ April 21, 2008 1 Figure 1 Kilohana Sewer Improvements Study Area f- X Q 111 I i i —r-V , pa, -. la Jar M at ~ fizl I, r g II Pt 1 3 Y as • •tt P $ ati l r l " � I ( i'` /LIWt• "sr 010 a 1 t t } d ..� k tri ,� ' Y AP t A t 1 -f+rw a+ ui _i. t t . i 4, Y r J 1 _ `�au`g - 1 3 ,r' Y ., r : p —u am It 1 _ '1 4 .1E. , Jimai,:.41„...-:.,: t .,. i ...,:tv,_.r es a le 6,3 / 111 to - 4 — .1--:__ riat [ ...., 0 t \ I i k * 1 Oat tp z Is ohs *t , Apri121, 2008 Kilohana Sewer Improvement Financing 3 II. COMMUNITY FACILITIES DISTRICT ANALYSIS The Community Facilities District Code ( "CFD Code ") [Chapter 32 of the Hawaii County Code 1983, 2005 Edition as amended] was adopted by the Council in 1994 to provide an alternate means of financing infrastructure. The CFD Code permits the County to create defined areas within its jurisdiction and impose special taxes to pay for the special improvements needed to , serve that area. A CFD may provide for the purchase, construction, installation, expansion, improvement, or rehabilitation of any special improvement with an estimated useful life of at least five years. Special improvements are generally publicly owned, but may be privately owned if the Council determines that the improvements serve a public purpose. A CFD may also finance the costs of planning, design, engineering, and consultants involved in the construction of improvements or formation of the CFD. Facilities financed by a CFD do not have to be physically located within . the CFD. There is no benefit finding required for a CFD, which makes a CFD the ideal method of financing facilities that provide "general benefit" to a community, such as schools, parks, police and fire facilities, freeway interchanges, and water and sewer treatment plants. The lack • of a strict nexus, or special benefit, requirement also provides a great deal of flexibility in how infrastructure costs may be allocated to land uses within the Kilohana area. • CFD OVERVIEW Implementation Establishment of a CFD can be initiated by either a motion of the Council or a petition signed by owners of at least 25% of the land within a CFD, and begins with the adoption of' a resolution of intention to form the CFD. The resolution of intention sets forth the proposed boundaries of the CFD, the formula for allocating the special tax among properties in the CFD, improvements authorized to be funded by the CFD, a date for a public hearing to consider formation of the CFD, and the protest procedure. At or prior to the public hearing, protests may be submitted by landowners or lessees within the CFD and, if no majority protest exists (i.e., owners or lessees of more than 55% of the land, or 55% of the number of landowners, do not file protests), the CFD is formed by determination of the Council. However, if a majority protest exists, the proceedings must be abandoned for at least one year from the date of the hearing. Once a CFD is formed and a special tax has been authorized, bonds can be sold to fund special improvements. CFD bonds are tax- exempt, land- secured bonds, which means the ultimate security for the bonds is the value of the property that is within the CFD. There is no commitment from the County to pay special taxes in the event landowners become delinquent in, or default on, payment of special taxes, and there is no risk to the County's general fund if special taxes are not paid. After a CFD is formed, the County is responsible for the annual levy of special taxes, state or federal continuing disclosure requirements, monitoring delinquencies in the CFD, and pursuing foreclosure on delinquent parcels. Kilohana Sewer Improvement Financing 4 April 21, 2008 Unlike the County's ID code, the CFD Code is extremely flexible as to the boundaries of the CFD. Parcels included in the CFD do not need to be contiguous; no finding is required that property in the CFD receives a special benefit from facilities being funded by the CFD; and parcels can be left out of the CFD to avoid taxing particular land uses. In addition, property can be annexed into the CFD after formation, and such annexed property will be subject to special taxes just like property that was included in the CFD when the district was formed. Revenues Formation of a CFD authorizes the County to levy a special tax on all taxable property within the CFD in the manner prescribed in the formation documents. Property owned or irrevocably offered to a public agency may be exempted from the special tax. CFD special taxes are collected at the same time and in the same manner as property taxes, unless otherwise specified by the County. Special tax revenues may be used to pay debt service on bonds sold to provide funding for the construction or acquisition of special improvements; special taxes may also be used to pay directly for improvements. The CFD Code requires that special taxes be spread to properties in a "reasonable" manner. This language provides considerable flexibility in the allocation of burdens among property types and allows for the tax formula to take into account market considerations, workforce housing and economic development goals, and the timing of development in the CFD. CFD special taxes may be spread based on projected home value, size of unit, size of lot, type of land use, affordable vs. market rate units, and other project - specific criteria. In addition, most tax formulas include a series of steps that result in property that is further along in the development process being taxed first. For example, a tax formula might include the following steps of taxation: Step 1. Levy the maximum tax on parcels for which a building permit has been issued; Step 2. If additional revenue is needed, levy up to the maximum tax on parcels for which a final map has been recorded. Having special tax tiers reduces the tax burden on property that is further away from generating a positive cash flow. This can reduce the holding costs on property that will not be developing in the near term, which will reduce the risk of foreclosure and bond default. Funding Limitations There are two limitations on the amount of financing available from a CFD, the first being the value of the property in the CFD. Value is determined by an appraisal, which would be conducted in accordance with prevailing standards of appraisal used by financial institutions for loans and with other criteria as established by the County. The County's CFD Code requires a minimum value -to -lien ratio of 3 -to -1 to issue bonds. "Lien" refers to the amount of bonds proposed to be issued, together with those outstanding, at any given time. The second restriction on the amount of financing available from a CFD is the amount of special tax that can be levied on property, which is subject to market constraints. Although there is no legal limit as to the amount of special tax that can be levied, industry standards usually dictate a Kilohana Sewer Improvement Financing 5 .. April 21, 2008 maximum total tax rate on residential units of 2% of the finished home value. The total tax rate includes the 0.9% base property tax rate and overlapping assessments or special taxes from other financing districts on the property. There is no standard for the maximum tax rate on non- residential property, which is usually limited to less than 2% by economic development objectives or the competitive marketplace. CFD FINANCING FOR KILOHANA SEWER IMPROVEMENTS All of the sewer improvements needed to serve the Kilohana area are eligible facilities pursuant to the CFD Code. Due to the flexibility inherent in the CFD Code, the boundaries of a CFD can be drawn to include only those parcels on which new development is expected. Properties that do not agree to participate when the CFD is formed can be annexed into the CFD at a later date. Nevertheless, for purposes of this analysis, it is assumed that the boundaries of the Kilohana CFD correspond to the boundaries of the Kilohana ID, as shown in Figure 1, and include both existing and new development areas. CFD Assumptions Many assumptions are factored into the CFD analysis for the Kilohana sewer improvements. Some of the most critical assumptions in terms of their affect on the amount of debt required and the resulting special tax rates are delineated below: 1. Pursuant to direction from County staff, the CFD analysis includes two scenarios to evaluate impacts on special tax rates related to a $1.5 million contribution from the County. Scenario 1 assumes all of the facilities ($16.9 million) are funded through the Kilohana CFD, while Scenario 2 assumes the County will contribute $1.5 million to pay for a portion of these facilities, reducing the total amount that must be funded through the Kilohana CFD to $15.4 million. The primary findings from each of the two scenarios are presented in Table 1 of the Appendix. 2. A cost breakdown of the wastewater improvements required to serve the Kilohana area for each scenario is shown in Table 2 of the Appendix. CFD - financed costs are delineated between Kilohana costs and non - Kilohana costs for both scenarios. Kilohana costs are allocated to the Kilohana subdivision only, while non - Kilohana costs are allocated to the remaining subdivisions (i.e., Alii Kai, Kamani Tree, Komohana Kai, and Kalani Makai). Kilohana costs include costs for: (i) construction and design of the main collection system and Kilohana's share of Sub -Basin 1; (ii) installation and design of a pump station and force main; (iii) closure of 8 large capacity cesspools; and (iv) installation of grinder pumps. Non - Kilohana costs include costs for: (i) construction and design of Sub -Basin 2, 3, and 4 and the remaining portion Sub -Basin 1 that is not funded by the Kilohana subdivision; (ii) installation of grinder pumps; and (iii) closure of single family cesspools. Kilohana Sewer Improvement Financing 6 April 21, 2008 Results of the CFD Analysis A comprehensive debt financing analysis was conducted to estimate the maximum special tax rates necessary to fund the costs related to sewer improvements needed to serve in the Kilohana area. Based on cost estimates developed by Engineering Solutions and modified by County staff, the CFD would need to finance approximately $16.9 million under Scenario 1 and $15.4 million under Scenario 2. The primary findings from each of the two scenarios included in this financing analysis are presented in Table 1 of the Appendix. The initial maximum annual special tax rates per unit for each residential land use type (i.e., Kilohana w/ Grinder Pump, Kilohana w/o Grinder Pump, non - Kilohana w/ Grinder Pump, and non - Kilohana w/o Grinder Pump) identified in this table represent the amounts required to meet each scenario's funding requirements. For example, an initial maximum special tax of $3,030 per Kilohana w/ Grinder Pump unit is necessary under Scenario 1 (includes no County contribution) to fund $16.9 million (current dollars) of facilities. Under Scenario 2 (includes a $1.5 million County contribution), an initial maximum special tax of $2,980 is required for the same unit. Table II -1 below compares resulting special tax rates for each land use type under both scenarios of the CFD analysis. Table II -1 Comparison of Initial Maximum Special Tax Rates per Unit (FY 2007 -08)* Land Use Scenario 1 Scenario 2 Kilohana w/ Grinder Pump $3,030 $2,980 Kilohana w/o Grinder Pump $2,450 $2,410 Non - Kilohana w/ Grinder Pump $2,320 $2,080 Non - Kilohana w/o Grinder Pump $1,730 $1,560 * Assumes special taxes increase 2% per year. The CFD bond analysis is presented in Tables 3.1 through 3.3 and 4.1 through 4.3 of the Appendix and is based on the following factors: (i) special taxes escalate 2% a year; (ii) bond interest rate of 6.5 %; (iii) bond term of 30 years; (iv) debt service coverage ratio of 110 %; and (v) issuance costs and reserve funds of 5% and 10 %, respectively, of the gross bond proceeds. Tables 3.1, 3.2, and 3.3 are the bond analysis, cash flow, and value -to -lien analysis for Scenario 1 (no County contribution); Tables 4.1, 4.2, and 4.3 relate to Scenario 2 ($1.5 million County contribution). As shown in both Table 3.3 and Table 4.3, the value -to -lien ratio under both Scenario 1 and Scenario 2 is significantly higher than that required by the County (the County requires a 3 -to -1 ratio). The value -to -lien ratios equal 18.6 under Scenario 1 and 20.4 under Scenario 2. Kilohana Sewer Improvement Financing 7 April 21, 2008 Annual Burden Analysis An annual burden analysis is generally used as a comparison tool to analyze the total burden on homes across different development projects, varying home prices, and /or diverse home sizes. The analysis delineates all taxes that are anticipated to be levied on a home each year (i.e., general property taxes, assessments, special taxes, and all other charges that usually appear on property tax bills) as well as a home's assessed value to derive the percentage of a home's assessed value that relates to the total taxes; this percentage is typically referred to as the effective tax rate. Public agencies often adopt policies limiting the effective tax rate on homes within their jurisdictions (e.g., most cities and counties in California limit total taxes to 1.5% to 2.0% of a home's assessed value). Such policies help ensure that the total annual burden on a home could be supported by existing /future homeowners and, consequently, ensure a project's long -term feasibility. Table I1 -2 below presents the estimated total annual burden, including property taxes and the proposed Kilohana CFD special tax, on an owner- occupied residential unit requiring a grinder pump, within the Kilohana subdivision and outside of the Kilohana subdivision, under Scenarios 1 and 2. For those units outside of Kilohana, the total burdens are presented assuming both a low -end average home price ($430,000) as well as a high -end average home price ($750,000). The range for home prices is derived, using data provided by County staff, from the average listing prices of homes currently on the market and sales prices of homes that have been sold within the last year and a half. The estimated total annual burden under Scenario 1 ranges from 0.98% to 1.15% of a home's estimated value. The total annual burden for Scenario 2 is slightly lower than Scenario 1 and ranges from 0.85% to 1.09% of a home's estimated value. While there is ample bonding capacity based on the value -to -lien requirement, as discussed above, the County, as it works with the homeowners in the area, should also consider the results of the annual burden analysis in determining the final special tax rates for the proposed Kilohana CFD. Kilohana Sewer Improvement Financing 8 April 21, 2008 Table I1 -2 Annual Burden Analysis and Special Tax Comparison For an Owner- Occupied Home Scenario 1 Scenario 2 (No County Contribution) ($1.5M County Contribution) Kilohana Non - Kilohana Kilohana Non - Kilohana (Average (Low -End (High -End (Average (Low -End (High -End Residential Unit w/ a Grinder Pump Home Price) Home Price) Home Price) Home Price) Home Price) Home Price) Estimated Home Price/ $610,000 $430,000 $750,000 $610,000 $430,000 $750,000 Assessed Value (AV) Homeowners Exemption $40,000 $40,000 $40,000 $40,000 $40,000 $40.000 Taxable Assessed Value $570,000 $390,000 $710,000 $570,000 $390,000 $710,000 Property Tax (0.555% of AV) $3,164 $2,165 $3,941 $3,164 $2,165 $3,941 Proposed Kilohana CFD Tax 3 030 $2,320 $2,320 51,M $2,080 $2,080 Total Annual Burden $6,194 $4,485 $6,261. $6,144 $4,245 $6;021 Annual Burden as a % 1.09% 1.15% 0.88% 1.08% 1.09% 0.85% of Assessed Value Scenario 1 Scenario 2 Annual Special Tax Comparison (No County Contribution) ($1.5M County Contribution) Proposed Kilohana CFD Kilohana w/ Grinder Pump $3,030 $2,980 Kilohana w/o Grinder Pump $2,450 $2,410 Non - Kilohana w/ Grinder Pump $2,320 $2,080 Non - Kilohana w/o Grinder Pump $1,730 $1,560 Other CFDs Villages of Aina Le'a CFD (avg) $4,716 $4,716 Waikoloa Workforce Housing CFD $5,139 $5,139 In addition, the bottom section,of Table II -2 presents a comparison of special tax rates for a residential unit within the proposed Kilohana CFD, the Villages of Aina Le'a CFD, and the Waikoloa Workforce Housing CFD. The annual special tax rate on a residential unit in the Kilohana CFD (includes all unit types) is lower than the special tax rates applicable to a unit in both the Villages of Aina Le'a CFD and the Waikoloa Workforce Housing CFD under both scenarios. Kilohana Sewer Improvement Financing 9 April 21, 2008 Advantages and Disadvantages of CFD Financing Table II -3 below summarizes some of the advantages and disadvantages that should be considered in relation to using CFD financing for improvements in the Kilohana area: Table II -3 CFD Advantages and Disadvantages Advantages Disadvantages A CFD special tax can be spread in any CFD special tax formulas are more "reasonable" manner, which can complicated than ID assessment spreads. accommodate market and policy considerations. A CFD is formed without a majority A CFD does not result in a fixed lien protest (i.e., protests from owners or being assigned to each parcel, which lessees of >55% of the land, or from makes prepayment of special taxes a bit >55% of the landowners). more complicated and slightly more expensive than prepayment of assessments. CFD boundaries can be non - contiguous, CFD bonds require a 110% debt service expand with annexations, and be drawn coverage, which is not required for ID to include only properties who want to bonds. participate at the start. The special tax can be spread on various tiers of developed and undeveloped property to reduce the burden on parcels that will take longer to develop. CFD bonds are non - recourse to the County, so the County's general fund is not at risk. A CFD financing program can easily accommodate multiple bond issues to fund later phases of improvements. The special tax can be structured to increase each year, which will reduce the starting special tax rate by almost 20% (if escalated 2% per year). Public parcels can be exempt from the special tax without a benefit finding. Kilohana Sewer Improvement Financing 10 April 21, 2008 III. FINANCING ALTERNATIVES Resolution No. 129 -03 directed County staff to evaluate a variety of mechanisms to fund the required sewer improvements to serve development in the Kilohana area and comply with EPA regulations, including CFDs, IDs, TIDs, and private financing. While a detailed overview of CFD financing is discussed in the previous section of this report, this section provides a summary of alternate funding tools that are available to generate local funding for the required sewer improvements. Each funding tool involves different implementation procedures, revenue sources, and security requirements, which are all discussed in detail below. IMPROVEMENT DISTRICTS Chapter 12 of the Hawai`i County Code (Improvement by Assessment) provides a mechanism to fund public infrastructure through the establishment of an ID. More specifically, the chapter provides a mechanism for the County to: (i) fund the acquisition or construction of special improvements; (ii) apportion improvement costs against properties in a designated area which directly benefit from the infrastructure; (iii) issue tax - exempt, land - secured bonds to amortize payment of improvement costs over a 20 to 30 -year term; and (iv) secure liens against property within the ID to ensure a reliable stream of revenues to pay debt service on the bonds. An ID is authorized to fund special improvements that provide a direct and special benefit to properties within the ID. Eligible facilities generally include roadway improvements, water, sewer, and storm drainage facilities, street lighting systems, utilities, recreation facilities, and any other public improvement that provides a special benefit to properties within the ID. The required finding of direct and special benefit provides certain challenges when "regional" improvements, such as schools, parks, police and fire facilities, freeway interchanges, and water and sewer treatment plants, are required. Typically, only the portion of such facility costs that relates to the benefit received by the parcels in the ID can be funded by the ID. Because of the required special benefit finding, the boundaries of an ID are almost always contiguous. Property cannot be left out of the boundaries and assessments cannot be adjusted based on a property's ability to pay, willingness to participate, or market feasibility. Implementation The formation of an ID is initiated through either a petition submitted by a portion of the landowners (e.g., 20 %, 60 %, or 100 %, depending on the circumstances) in a proposed ID or through adoption of a resolution ordering preparation of a preliminary report by the Council. The Council then adopts a second resolution specifying: (i) the special improvements to be opened, constructed, or improved; (ii) the area, owners, and general description and location of new land to be acquired, if any; (iii) the materials proposed to be used; (iv) the proposed assessment unit, method of assessment, and the minimum number of installment payments; (v) the maximum term of assessment bonds to be issued related to unpaid installments; (vi) the maximum interest rate on the bonds; (vii) the maximum redemption premium on the bonds; (viii) the maximum amount in the reserve fund; (ix) the general boundaries of the ID; and (x) the maximum units of assessment. Kilohana Sewer lmprovement Financing 11 April 21, 2008 • Pursuant to Chapter 12, each landowner is sent a notice of public hearing, which identifies, among other things, the assessment assigned to his/her parcel and the method in which each landowner may protest against the proposed ID. At the public hearing, the County must determine whether a majority protest exists (i.e., protests from owners of 50% or more of the total assessment). If a majority protest exists, the County must abandon the assessment proceedings for six months from the date of the public hearing. If there is not a majority protest, a 30 -day payment period is commenced during which any property owner can prepay their assessment. After this 30 -day period, bonds are sold in the amount of all unpaid assessments. ID bonds are tax - exempt, land- secured bonds, which means the ultimate remedy for non - payment of assessments is foreclosure on property that is delinquent. There is no commitment from the public agency to pay assessments in the event of a delinquency or default, and there is no risk to the agency's general fund if assessments are not paid. After an ID is formed, the public agency is responsible for the annual levy of assessments, compliance with state and federal continuing disclosure requirements, monitoring delinquencies in the ID, and pursuing foreclosure on delinquent parcels. Revenues As discussed above, if no majority protest is received, an ID is created and annual assessments are authorized to be levied against all parcels within the ID that have an assigned assessment lien. This stream of annual assessments is used to pay debt service on tax- exempt municipal bonds, which are typically sold to institutional investors by a bond underwriting firm hired by the County. The liens assigned to parcels in the ID are directly related to the portion of infrastructure costs attributable to the parcel's special benefit from the facilities. The annual assessments are set in the amount needed to amortize the fixed lien over a defined bond term. Funding Limitations There are two limitations on the bonding capacity for an ID. First, the amount of bonds that can be sold is directly related to the liens assigned to parcels in the ID that were not prepaid during the 30 -day cash payment period. Second, the assessed value, or appraised value, of property in the ID is required to be at least two times the amount of the improvement cost to form the ID and three times the amount of bonds to be issued, or outstanding, at any given time. ID Analysis As discussed above, an ID analysis has been conducted by Engineering Solutions and the results of the analysis are detailed in the Implementation Study. While the Implementation Study should be referenced for specific details related to the ID analysis, a summary of the cost allocation methodology is included below. As noted in prior sections of this report, approximately $16.9 million under Scenario 1 ($15.4 million under Scenario 2), which is different from the total cost in the Implementation Study pursuant to direction from County staff, is needed to fund the required sewer improvements to serve development in the Kilohana area and comply with EPA regulations. Nearly two years have passed since the Implementation Study was submitted in. June 2006 and various Kilohana Sewer Improvement Financing 12 - April 21, 2008 infrastructure components and cost factors have changed; the total cost estimate at that time was $6.1 million. The Implementation Study allocates infrastructure costs equally to all residential units, whereas the proposed CFD assigns different special tax rates that account for varying locations (Kilohana vs non - Kilohana) and capital improvements (with vs without a grinder pump). The ability to distinguish one residential unit from another for any number of reasons may be a determining factor as the County selects an appropriate funding technique. Advantages and Disadvantages of ID Financing Table III -1 below summarizes some of the advantages and disadvantages that should be considered in relation to using ID financing for improvements in the Kilohana area: Table III -1 ID Advantages and Disadvantages Advantages Disadvantages An ID is formed without a majority The allocation of costs and spread of protest (i.e., protests from owners of assessments must be based on the direct 50% or more of the total assessment). and special benefit received by each parcel in the ID. Assessment allocations are generally Public property cannot be exempt from the straight - forward and easy to assessment unless it is determined that such understand. property does not benefit from the improvements. The County will need to appropriate general fund revenues to pay for assessments that would be assigned to public property. A fixed lien is assigned to each parcel, A parcel in the ID must pay its fair share which makes prepayment of the lien a from the start, regardless of the status or simple procedure. timing of development on the parcel. It is difficult to accommodate multiple series of bonds in an ID; typically bonds are issued for all facilities at once. There are very few creative structuring techniques that can be used to keep assessments at a lower level in the early years of development. Kilohana Sewer Improvement Financing 13 April 21, 2008 • OTHER FINANCING ALTERNATIVES In addition to the two financing mechanisms (i.e., CFDs and IDs) discussed above, County staff has been directed to evaluate the feasibility of funding the required wastewater improvements through a TID as well as private financing. For various reasons, as detailed below, these alternate funding tools may not be applicable to fund those improvements needed serve the Kilohana area. Chapter 33 of the Hawaii County Code (Tax Increment Districts) authorizes the County to establish a TID to finance public improvements under certain conditions. One of those conditions is that the Council must determine the area to be included in a TID to be a "targeted" area, which is an area that is significantly impacted by "blight." Making findings of blight may be difficult to do in this area. In addition, based on certain provisions of the Hawai`i Revised Statues, bond attorneys are questioning the ability to bond against a stream of tax increment revenues produced by a TID. So, while it is possible to form a TID and generate tax increment revenue, it may not be possible to issue bonds secured by the tax increment. This means that tax increment could be used to fund infrastructure on a pay -as- you -go basis (i.e., as tax increment becomes available on an annual basis), but funding for significant components of infrastructure, which are needed in one lump sum, may not be available. Finally, the County could require homeowners in the Kilohana area to privately fund the required sewer improvements. However, it may be difficult to rely on private financing considering the significant amount and upfront nature of infrastructure needs for this area. It may be very difficult for a homeowner, or even a group of homeowners, to finance these infrastructure costs privately. Kilohana Sewer Improvement Financing 14 April 21, 2008 IV. CONCLUSION Both a CFD and an ID share the positive attributes identified below: • Ability to fund all of the needed improvements in the Kilohana Sewer Master Plan; • Both can be formed without a majority protest; • IDs and CFDs require a minimum va1ie -to -lien ratio of 3 -to -1; and • ID bonds and CFD bonds are non- recourse to the County, so the County's general fund is not at risk. However, the limitations of an ID compared to the flexibilities of a CFD justify the formation of CFD as the preferred funding tool. While assessments must be allocated based on benefit, special taxes may be allocated in any reasonable manner. Although only four preliminary special tax rates (i.e., Kilohana w/ Grinder Pump, Kilohana w/o Grinder Pump, Non - Kilohana w/ Grinder Pump, and Non - Kilohana w/o Grinder Pump) are proposed for the CFD financing analysis, actual special taxes levied within a CFD can be spread in a manner that accommodates a variety of housing types in the Kilohana area. For example, the special tax rate could vary based on unit size, lot size, assessed values, or geographic location, and consulting with the homeowners could produce other criteria upon which to base the special tax. Parcels of public property can be exempted from the special tax. Considering the opportunities and constraints of each mechanism, a CFD appears to be an ideal financing mechanism to fund the required sewer improvements in the Kilohana area. If the Council determines that a CFD is to be formed, the County would assemble a financing team made up of bond counsel, financial advisor, underwriter, special tax consultant, and appraiser to begin the CFD formation process. Formation of a CFD typically takes from four to eight months depending on the number of property owners that participate in the CFD. After the CFD is formed, bonds can be sold to fund public improvements. Kilohana Sewer Improvement Financing 15 April 21, 2008 APPENDIX: KILOHANA SEWER IMPROVEMENTS FINANCING ANALYSIS TABLES Table 1 County of Hawaii Kilohana Sewer Improvements Summary of Financing Analysis Scenario 1 Scenario 2 • (No County ($1.5M County Contribution) Contribution) • Bond Issues Year Bonds Issued: 2010 Construction Costs Funded by Bonds (Current $) $ 16,874,000 $ 15,374,000 Construction Costs Funded by Bonds (Future $) $ 18,439,000 $ 16,800,000 • Total Bonds Issued $ 21,700,000 $ 19,770,000 Special Tax Revenue Developed Property Special Taxes $ 50,971,000 $ 46,539,000 Undeveloped Property Special Taxes $ - $ - Total Special Taxes Levied $ 50,971,000 $ 46,539,000 Initial Maximum Annual Special Tax Rates (FY 2007 -08)/1 Kilohana w/ Grinder Pump $ 3,030 $ 2,980 Kilohana w/o Grinder Pump $ 2,450 $ • 2,410 Non - Kilohana w/ Grinder Pump $ 2,320 $ 2,080 Non- Kilohana w/o Grinder Pump $ 1,730 $ 1,560 /1 Assumes special taxes increase 2% per year. Source: Goodwin Consulting Group, Inc. 04/21/2008 Table 2 County of Hawaii Kilohana Sewer Improvements C Breakdown . • Design Estimated Cost Gross Cost /2 Total • Improvement per Unit (20075) /1 Units Cost (20 %) Cost Scenario 1 Kilohana Costs Main Collection System 51514.100 1 LS $1,514,100 $302,820 51,816,920 Sub -Basin 1 /3 5212,867 1 LS 5212,867 $42,573 $255,440 Pump,Staticn & Force Main 5185A00 1 LS $185,400 537,080 5222,480 Large Capacity Cesspool Closure $10,000 8 Units $80,000 n/a $80,000 Grinder Pump $7,210 15 Lots $108,150 n/a $108,150 Subtotal Kilohana Costs 52,100,517 5382,473 52,482,990 Non - Kilohana Costs Sub -Basin 1 /3 5106,433 LS $106,433 521,287 $127,720 Sub -Basin 2 52,255.700 LS $2,255,700 5451,140 52,706,840 Sub -Basin 3 $1,503,800 LS $1,503,800 $300,760 51,804,560 Sub -Basin 4 53,996,400 LS $3,996,400 5799,280 54,795,680 Grinder Pump 57,210 27 Lots $1553,910 n/a $1,953,910 Single Family Cesspool Closure 55,150 58 Lots $3,002,450 n/a $3,002,450 ' Subtotal Non - Kilohana Costs $12,616,693 $1,572,467 $14,391,160 Total CFD - Financed Cost 514,919,210 51,954,940 516,874,160 Scenario 2 • Kilohana Costs Main Collection System 51,514,100 1 LS $1,514,100 5302,820 51,816,920 Sub -Basin 1 /3 5212,867 1 LS $212,867 $42,573 $255,440 Pump Station & Force Main ' 5185.400 1 LS 5185,400 $37,080 5222,480 Large Capacity Cesspool Closure 510,000 8 Units 580,000 n/a 580,000 Grinder Pump 57,210 15 Lots 5108,150 • n/a 5108,150 Subtotal Kilohana Costs $2,100,517 $382,473 52,482,990 Less: County Contribution /4 (539541) Net Kilohana Costs $2,443,449 Non - Kilohana Costs Sub -Basin 1 /3 $106,433 LS 5106433 521,287 $127,720 ' Sub -Basin 2 52,255,700 LS 52.255,700 5451,140 52,706,840 Sub -Basin 3 $1,503,800 LS $1,503,800 5300,760 $1,804,560 Sub -Basin 4 $3,996,400 LS $3,996,400 5799,280 54,795,680 • I Grinder Pump 57,210 27 Lots 51553,910 n/a 51,953,910 Single Family Cesspool Closure $5,150 58 Lots $3,002,450 n/a $3,002,450 Subtotal Non - Kilohana Costs 512,818,693 51,572,467 514,391,160 Less: County Contribution /4 ($1,460,459) Net Non - Kilohana Costs $12,930,701 Total Cost $16,874,150 Less: County Contribution (51,500,000) Net CFD- Financed Cost $15,374,160 /1 Estimated costs from the draft Kilohana Sewer Improvement District Implementation Study are inflated to 20075 applying a 3% annual inflation rate. /2 Design costs only apply to certain projects, including the main collection system, Sub-Basins 1 through 4, and the pump station and forcemain. /3 Sub -Basin 1 costs are allocated between Kilohana units and non - Kilohana (Kalani Makai) units based on the number of units in each subdivision that would be served by Sub -Basin 1. . /4 The 51.5 million contribution from the County is apportioned to Kilohana units and non Kilohana units based on their proportionate share of sub basin costs. Source: Engineering Solutions, Inc; County of Hawaii; Goodwin Consulting Group, Inc. 04/2112006 • • • Table 3.1 County of Hawaii Kilohana Sewer Improvements Bond Analysis Summary Scenario 1 (Assumes No County Contribution) Bond Assumptions Average Effective Interest Rate 6.50% Bond Term (in Years) 30 Issuance Cost / Underwriter's Discount as a % of Bond Issue 5.00% Reserve Fund as a % of Bond Issue 10.00% Capitalized Interest as a % of Bond Issue 0.00% Years of Capitalized Interest in Bond Issue 0.0 Annual % Special Tax Increase 2.00% Bond Sources Number of Issues: 1 • Year of Total Bond Issue Bond Issue Bonds Issued 1st 2010 $ 21,700,000 Bond Uses Construction Costs Funded by Bonds (Future $) $ 18,438,839 Reserve Fund $ 2,170,000 Capitalized Interest $ - Issuance Costs / Underwriter's Discount $ 1,091,161 Total $ 21,700,000 • Special Tax Revenue Developed Property Special Taxes $ 50,971,000 Undeveloped Property Special Taxes $ - Total Special Taxes Levied $ 50,971,000 Initial Maximum Annual Special Tax Rates (FY 2007 -08) Kilohana w/ Grinder Pump $ 3,030 Kilohana w/o Grinder Pump $ 2,450 Non - Kilohana w/ Grinder Pump $ 2,320 Non - Kilohana w/o Grinder Pump $ 1,730 Source: Goodwin Consulting Group, Inc. 04212008 ¢¢ a a a a e a a 0 a a a a a a a a a 0 a a a a 0 a a a a a 0 a a. y ' z z °° °° o o °00 00 °°°° 0 0 0 0 0 0 0 0 °o °o °0 C m o o o 0 o 0.0.0.0.0.00 0 0 ° o ° ° o o 0 o °o o ° °o 0 0 o o d d d d d o o 0 0 6 6 6 6 o 606 0 d d 6 6 6 d d° 0 d 0 U Q Q Q Q I"- O N 0 N n m 0 CI n m r 0 CO Q n O 04 . % N 0- r m N b O O 1D m r 0 O°i N '4 E F . 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N N CO CO ^ N n 0 CO 0 0 0 0 0 (0 0 0 0 O 0 4 V) 03 m N N (O O N N N O O 0 r f0 O f0 O ) 6 O O) z 0 19 f9 69 0 N 0 M 0 N M N w r N y r9 63 w w r » W 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D n r w 0i o O o 0 0 0 d 0 t0 0 10 N O. - to - w - .0 O oi to C o = 5 Q O j c a N U c a o a w g. z, J 0 a u . 7 a J 2 J e 2 V n 0 6 0 w d V o n E no U 0 n oa m �3 E n E n E a v > a E a `w v > w >. 0 > Co j E n 0. a D. a 0 n 0 d ' a o o 0 0 2 a ' a 5 j c r v m U L 0 0 E 7 yva ` o E 43 -8 ' 2 `v daa C.5 d — _ ° nmo m g Q e E a ' a s ° a ' o ° °- 0 ai v n a c o n d v e _ E pi : y • W v U' ¢ Q `w v c 6 n m o h 6 3 3 ? c 0 cp , Fa N O N n c c 0 cc, a c c 0 m o= m o m U' o C c i0 c � 0 m t • Q ti 'c (ry 3 3 j •c E 0 >> = 0 3 ; n n o n E �' c S C` m O 2 2 E 0_ O co c> > N N g. C C O O . R 0 N - . y o V. - 0 CO j 3; c CO a ? 3 3 c c U u> c 0 co N Y Y 0> 0 O O 'm J 2. t"I O tp O0 �, m m x o o 3 2 2 o o .1?, 2 E E = E o p E E m °c To E ti et y c = Q C u c == 0 o 0t Ett c c F `UU o z ° z ° w t ° - : - ° � c - ° - ° o . -° 0 0 m o m h U Y U y W Q Y Y Z Z U Y Y Z Z E > m > • Table 4.1 • County of Hawaii Kilohana Sewer Improvements Bond Analysis Summary Scenario 2 (Assumes $1.5M County Contribution) Bond Assumptions Average Effective Interest Rate 6.50% Bond Term On Years) 30 Issuance Cost / Underwriter's Discount as a % of Bond Issue 5.00% Reserve Fund as a % of Bond Issue 10.00% Capitalized Interest as a % of Bond Issue 0.00% Years of Capitalized Interest in Bond Issue 0.0 Annual % Special Tax Increase 2.00% Bond Sources Number of Issues: 1 Year of Total Bond Issue Bond Issue Bonds Issued 1st 2010 $ 19,770,000 • Bond Uses Construction Costs Funded by Bonds (Future $) $ 16,799,749 Reserve Fund $ 1,977,000 Capitalized Interest $ - • Issuance Costs / Underwriter's Discount $ 993,251 Total $ .19,770,000 Special Tax Revenue • Developed Property Special Taxes $ 46,539,000 Undeveloped Property Special Taxes $ - Total Special Taxes Levied $ 46,539,000 Initial Maximum Annual Special Tax Rates (FY 2007 -081 Kilohana w/ Grinder Pump $ 2,980 Kilohana w/o Grinder Pump • $ 2,410 Non - Kilohana w/ Grinder Pump $ 2,080 Non - Kiloharia w/o Grinder Pump $ 1,560 Source: Goodwin Consulting Group, Inc. 04212008 0 0 0 e ee e 0 e e, 0 0 e e e e v e e 0 O e 0 C G¢< a e 0 0 e e 0 b Z Z Z Z O O O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O O O O O m 0 0 0 0 0 0 O O 0 0 0 0 0 0 0 0 0 O O O O 0 0 0 0 O G OO OO OO OO O OO OO 0 0 0 0 0 0 0 0 6666 O 0 O 0 Q Q Q 0 N p N m N N 0 m N 0 0 N N m m �( m_ N b_ 0_ N m N ry N r O N 0 O N O 0 m m E g b Z Z Z 2.' m O 0 IO i m N N m m 0 0< O< 0 N N N ° Q N tO G 0 01 < O 0 m 00 N 0 w O ffl 0 F O O 0) O l ] - C N .x .CD w fm rwi - -- "0 .-1b _ -- . 000 �Nrv N° n N O ..- N N N N N N N ) • C 10 m vi w 44 w 00 40 w w w w w w w w w w w w w 00 w w w w w 00 w YI 40 w w 1010N .- 0 0 0 0— m 0 N N 0 a0 N 0 O 0 % 0 0 N 0 01 N p ^ N 0 N' C N _ N N — F Si O O N cg 0 N< 0 I - 0 _ N [m0 N N 0 l— N O 10 O N _ m N tp I` C O N N 4 r O < 0 m N To g - N N 0) 2222;4'4 N 0 N N 0 0 0 r.. 332 ONf N 838 , m r �- ,- ,- r .- � .- ,- N N N N re < w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w b y T C b N C O 6 ,- y C LL C n w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w w ...' 0 4) 0 0) N 0 N 0'— 0 0 0 0,- Y 0, N N 0 0 N 0 0 0 'py b N ( 0 Q O N 0 N- N N '33382g8882°843828282 N 6 ] 0- 0 0) N (0 N-- N 0 0 1, O O Ol m O 1O Y N- 0 O N 0 0 0) 0 1: l= m m 81 3 m 8 m m 4- 3 8 0 2 8 m m m f f _ 0$ 2 _ . _ m m O 3 g N T . 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Li •••• D c 0 'c c c d C C N p O o m 4 Q U y O m d n E o b a ch O h Q n n E n n o U o n d> ,_ E. E E 3 a a v i n E a o 2 L i W E n D a o 8 . ' n 0 CI- o a 3 m r a' . 2 c m r a m 0 • n n a a p ° c Q L N o E D y a 6 0 E a y y n = 2 y a d c (7 m a o m p O. 0 m 0 a a c o m O p, a C Q u .. w n d a n -041>n0 b y p 0" o c �j a <- d c aj > E m c w c 0 3 3 w m? 6) N a s a c _ o «o c� o m o m m 0 o m m c 0 0 .q _ °) e' ' A 0 0 M c E" a 0 0 c c c 5 A 5a f d m m o_ o d m ' m ° y � . co O N m ` c ;; m m 6 > ,p m U m c c m > m 0 0 5 )") O to N O m = c 3 3 r t u 3 5 �, E c c Y Y E a m c C d >. o o i9 75 m m o 0 2 E E - 0 0 d c m c E 6 �' 0 Q t m D t t Y Y F o t L 2 2 F m U 0 u W 2 Y Z Z W F a 0 0 / 0 - K d 0 . • .O 7 O O y N C O O O O = E 2 2 0 0 C q O N 0 o Y V N � 6 Y Y Z Z o Y Y Z Z > m > William P. Kenoi o=`.'y`, Nancy E. Crawford Mayor f( � ��� ,' , � / • Director --s•t_ • +�..' Deanna S. Sako ••• oi d• . Deputy Director County of Hawaii Finance Department 25 Aupuni Street, Room 118 • Hilo, Hawaii 96720 (808) 961 -8234 • Fax (808) 961.8248 MEMORANDUM DATE: July 31, 2009 TO: Lono Tyson, Director Department of Environmental Management FROM: Nancy Crawford Finance Director RE: Kilohana Sewer Improvements Financing Analysis Mike Okumoto, Treasurer, and I have reviewed the financing analysis report prepared by Goodwin Consulting Group. It is my understanding that this study was initiated in compliance with County Council Resolution 158 -04, which contemplated the creation of an Improvement District (ID) pursuant to Chapter 12 of the Hawai'i County Code. The conclusion of the study regarding the best mechanism for financing sewer improvements for Kilohana and the surrounding area is that a Community Facilities District (CFD) would allow the greatest flexibility and be most likely to succeed in the community. We agree that a CFD would be the best choice for Kilohana and the surrounding area. However, we also feel that neither an ID nor CFD is likely to be accepted by the community at this time. There is little motivation for those outside of the Kilohana subdivision to form the district and pay for the sewer improvements. The Finance Department recommends that the improvements be limited to just the required work for Kilohana. In that scenario, an Improvement District would probably be the best financing option. Hawat'i County is an equal opportunity provider and employer. L- o a z g Q m a= == -• �,, , � IJ " o z z o 1 ream svi, m o o _ N w V S `�' z b f — d 111111 NM War 1 1 41 111 iggla. 1111 ,c 6 ral alial rie Ve Oft ma ar 0 j 6 N w N Fe 5 w N Y o Z rri v) Mini al l me Milli = - • �f J a Y 2c .i o w x W Lu IMO aim UM Nom lift laVar at at 184 ow air s Awe ipi s wow I; we rat iw4i st, Z ! 0 W > o linstr � � ■ � • a w a il t ____ I ii I 4 a 0 m a I • � , == a1 VP Str; ° o b b,) . - in .. or L T_ 111 g .. • � I * 1 Lti LA fe, jtIa 12- I � � r . ��. a �- . ■■-� illi **At t 14 Pq m pg. iarti ...------ ti m o s !: i P , r �' #, ESE ::::::::: m 1. i x'" 4 allin BOUM 01 E, aq mom 1100 ■m ■Mss � s� ��te'� /: �� '•-• "kay di .0* tivi 0,-,. 111 . to ..ne : ■uru'u" Al 11 1 I ■ %NUM la II C as IIIIII F _ k la,;;;;;; - - ii p I �` t "r .., o � ■,\\t = fir 11111111114' fa WaNkla 111 1 %T ..i IMF 11 vi *10,4% sotz /O a3SVda L OoNaor/ amaizc 31. 1 Table 1 Summary - Wastewater Flows Location Desi Design Peak (mgd) Average (mgd) Kilohana Subdivision 0.025 0.157 Kahakai Elementary School 0.017 0.089 Kalani Makai Subdivision 0.034 0.200 Kamani Tree Subdivision 0.034 0.192 Alii Kai Subdivision 0.073 0.417 Komohana Kai Subdivision 0.079 0.506 Miscellaneous Parcels (between Kahakai School Access Road and Alii 0.003 0.018 Drive) Total 0.265 1.57 Source: Table 6.1 of Engineering Solutions, Inc., Kilohana Sewer Improvement District — Implementation Study, September 2008 • • Table 2 Main Advantages and Disadvantages of the Preferred Alternative ADVANTAGES DISADVANTAGES The high initial capital cost for the installation of the collection system (pipes, manholes and pump Wastewater is treated and disposed stations). Some portion or all of the cost associated at centralized location. with the required wastewater system improvements would be borne by the homeowners in the area through possible assessments and connection fees. Temporary noise, dust, and other disruptions in the community (e.g. traffic detours) during construction. Individual homeowners no longer need to maintain an onsite The treatment facility must also have the capacity wastewater system (cesspool, septic to handle the additional flows. tank with disposal seepage pit or field). Individual homeowners responsible for proper closure of the existing cesspools — including the cesspool closure costs and providing the State of Hawai i Department of Health with documentation of the closure. Elimination of individual cesspools Individual homeowners responsible for providing a reduces the risk of contamination of connection lateral from the home to the property groundwater resources since line — where it will connect to the new collection cesspools discharge untreated system. wastewater into the ground. a Instead of paying for cesspool maintenance, homeowners will pay County sewer fees. Source: Information from Engineering Solutions, Inc., Kilohana Sewer Improvement District— Implementation Study, September 2008 Table 3 SUMMARY: PROBABLE CONSTRUCTION COST (COUNTY PORTION ONLY) Sub -Basin District Cost Main Collection System $1,480,000 1 Kilohana & Kalani Makai $310,000 2 Ali'i Kai $2,220,000 3 Kamani Tree $1,490,000 4 Komohana Kai $3,010,000 Total $8,510,000 Source: Appendix C of Engineering Solutions, Inc., Kilohana Sewer Improvement District — Implementation Study, September 2008 Table 4 PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT IMPLEMENTATION STUDY Main Collection System Date: 12- Sep -08 Prepared by: AY Checked by: ESTIMATE OF PROBABLE COST OF CONSTRUCTION Est. Qty. Unit Description Unit Price Total 1800 SY Asphalt Pavement Demolition $ 10 $ 18,000 110 SY Concrete Sidewalk Demolition $ 20 $ 2,200 2 EA Connection to Existing Sewer System $ 1,200 $ 2,400 LS Clean and Flush Existing Sewer Pipes $ 15,000 $ 15,000 3300 CY Excavation and Backfill (rock) $ 135 $ 445;500 1000 CY Crushed Rock $ 60 $ 60,000 1560 LF 6" PVC Pipe $ 17 $ 26,520 3140 LF 8" PVC Pipe $ 35 $ 109,900 650 LF 10" PVC Pipe $ 40 $ 26,000 940 LF 12" PVC Pipe $ 45 $ 42,300 18 EA Sewer Manhole $ 5,000 $ 90,000 6 EA Drop Sewer Manhole $ 8,000 $ 48,000 58 EA Clean Out To Grade $ 500 $ 29,000 5 EA Lateral Reconnection $ 500 $ 2,500 3 EA Demolition of Existing Sewer Manhole $ 2,500 $ 7,500 1800 SY Asphalt Pavement Restoration $ 80 $ 144,000 110 SY Concrete Sidewalk Restoration $ 25 $ 2,750 LS Temporary Bypass $ 10,000 $ 10,000 LS Temporary Erosion Control Measures $ 18,900 $ 18,900 LS Traffic Control $ 62,900 $ 62,900 SUBTOTAL $ 1,163,370 Mobilization (6 %) $69,802 Contingency (20 %) $246,634 TOTAL $1,479,807 SAY $1,480,000 Ltq \ a� Yv' 1of1 ae gx Table 5 6v ' ' ` PROJECT: KILOIIANA SEWER IMPROVEMENT DISTRICT cV IMPLEMENTATION STUDY � * � "a"t SUB -BASIN 1 - Kilohana & Kalani Makai • ,i i ° `' 12-Sep-08 10 4 .; Da Prepared by: AY . 1 i : C hecked by: ESTIMATE OF PROBABLE COST OF CONSTRUCTION .if Est. Qty. Unit Description Unit Price Total `, 450 SY Asphalt Pavement Demolition $ 10 $ 4,500 k �A _ :• 40 SY Concrete Sidewalk Demolition $ 20 $ 800 t � ! 10 EA Connection to Existing Sewer System $ 1,200 $ 12,000 ` LS Clean and Flush Existing Sewer Pipes $ 15,000 $ 15,000 475 CY Excavation and Backfill (rock) $ 135 $ 64,125 130 CY Crushed Rock $ 60 $ 7,800 320 LF 8" PVC Pipe $ 35 $ 11,200 600 LF 4" PVC Pressure Pipe $ 15 $ 9,000 2725 LF 2" PVC Pressure Pipe $ 10 $ 27,250 17 EA Check Valve & Box $ 500 $ 8,500 8 EA Sewer Manhole $ 5,000 $ 40,000 450 SY Asphalt Pavement Restoration $ 80 $ 36,000 40 SY Concrete Sidewalk Restoration $ 25 $ 1,000 LS Temporary Erosion Control Measures $ 2,800 $ 2,800 LS Traffic Control $ 3,200 $ 3,200 SUBTOTAL $ 243,175 Mobilization (6 %) $14,591 Contingency (20 %) $51,553 Sai ` TOTAL $309,319 SAY $310,000 , ,iii€ e r ie as 1 of 00 .,1, ai Ate is u,..Y Table 6 ;4 P , ` KILOHANA SEWER IMPROVEMENT DISTRICT IMPLEMENTATION STUDY SUB -BASIN 2 - Alii Kai �D� ate • 12- Sep -08 Prepared by_ : AY Checked ;1 ESTIMATE OF PROBABLE COST OF CONSTRUCTION • ' Est Qty Unit Description Unit Price Total 4000 SY Asphalt Pavement Demolition $ 10 $ 40,000 � s� 1w 400 SY Concrete Sidewalk Demolition $ 20 $ 8,000 ,4 •5000 • CY Excavation and Backfill (rock) $ 135 $ 675,000 1100 CY Crushed Rock $ 60 $ 66,000 LF 6" PVC Pipe $ 17 $ 48,025 3820 LF 8" PVC Pipe $ 35 $ 133,700 } 5070 LF 2" PVC Pressure Pipe $ 10 $ 50,700 26 EA Sewer Manhole $ 5,000 $ 130,000 1;13 EA Clean Out To Grade $ 500 $ 56,500 109 EA Check Valve & Box $ 500 $ 54,500 4000 SY Asphalt Pavement Restoration $ 80 $ 320,000 DNS 400 SY Concrete Sidewalk Restoration $ 25 $ 10,000 LS Temporary Erosion Control Measures $ 35,200 $ 35,200 LS Traffic Control $ 117,200 $ 117,200 SUBTOTAL $ 1,744,825 Mobilization (6 %) $104,690 .a. Contingency (20 %) $369,903 TOTAL $2,219,417 SAY $2,220,000 I Fv k , t \.j d r 1 oft Table 7 PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT IMPLEMENTATION STUDY SUB -BASIN 3 - Kamani Tree Date: 12- Sep -08 Prepared by: AY Checked by ESTIMATE OF PROBABLE COST OF CONSTRUCTION Est. Qty. Unit Description Unit Price Total 2300 SY Asphalt Pavement Demolition $ 10 $ 23,000 150 SY Concrete Sidewalk Demolition $ 20 $ 3,000 3300 CY Excavation and Backfill (rock) $ 135 $ 445,500 1000 CY Crushed Rock $ 60 $ 60,000 2000 LE 6" PVC Pipe $ 17 $ 34,000 4950 LF 8" PVC Pipe $ 35 $ 173,250 19 EA Sewer Manhole $ 5,000 $ 95,000 77 EA Clean Out To Grade $ 500 $ 38,500 2300 SY Asphalt Pavement Restoration $ 80 $ 184,000 150 SY Concrete Sidewalk Restoration $ 25 $ 3,750 LS Temporary Erosion Control Measures $ 26,600 $ 26,600 LS Traffic Control $ 88,500 $ 88,500 SUBTOTAL $ 1,175,100 Mobilization (6 %) $70,506 Contingency (20 %) $249,121 TOTAL $1,494,727 SAY $1,490,000 s t �8 1 oft +S Fk lr Table 8 Tv ''' PROJECT: KILOHANA SEWER IMPROVEMENT DISTRICT IMPLEMENTATION STUDY SUB -BASIN 4- Komohana Kai Date: 12- Sep -08 Prepared by AY Checked by ESTIMATE OF PROBABLE COST OF CONSTRUCTION Est. Qty. Unit Description Unit Price Total 7000 SY Asphalt Pavement Demolition $ 10 $ 70,000 700 SY Concrete Sidewalk Demolition $ 20 $ 14,000 5000 CY Excavation and Backfill (rock) $ 135 $ 675,000 3500 CY Crushed Rock $ 60 $ 210,000 100 LF 6" PVC Pipe $ 17 $ 1,700 7200 LF 8" PVC Pipe $ 35 $ 252,000 1700 LF 10" PVC Pipe $ 50 $ 85,000 4400 LF 2" PVC Pressure Pipe $ 10 $ 44,000 45 EA Sewer Manhole $ 5,000 $ 225,000 250 EA COTG $ 500 $ 125,000 3 EA ARV $ 1,000 $ 3,000 142 EA Check Valve & Box $ 500 $ 71,000 7000 SY Asphalt Pavement Restoration $ 80 $ 560,000 700 SY Concrete Sidewalk Restoration $ 25 $ 17,500 LS Temporary Erosion Control Measures $ 40,200 $ 40,200 LS Traffic Control $ 134,000 $ 134,000 LS Land Acquisition $ 50,000 $ 50,000 SUBTOTAL $ 2,577,400 Mobilization (6 %) $154,644 Contingency (20 %) $273,204 TOTAL $3,005,248 SAY $3,010,000 • 1of1