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DEPARTMENT OF WATER SUPPLY • COUNTY OF HAWAII
e°3 345 KEKUANAO'A STREET, SUITE 20 • HILO. HAWAII 96720
'No -fey• TELEPHONE (608) 961-8050 • FAX (808) 961 8657
COUNTY CLERK
March 14. 2017 COUNTY OF HAWAII
RECEIVED
Time 7 1S r"' Hy
Date MAH 1 4 LUI/
Honorable Valerie T. Poindexter. Chairperson,
and Members of the Hawaii County Council
25 Aupuni Street
Hilo, Hawaii 96720
Dear Honorable Chair Poindexter and Council Members:
Subject: Iki Street Water Improvement District
Manager-Chief Engineer's Report
Kohanaiki, North Kona, Hawai`i
Attached for your review and action is the Manager-Chief Engineer's Report detailing a project for the
installation of a water system for the properties along Iki Place. as requested by Hawai`i County
Council Resolution No. 634-16.
[he attached report represents collaborative efforts on the part of the Department of Water Supply and
the Department of Finance.
Please do not hesitate to call me at 961-8050 if you have any questions or if l may he of further
assistance.
Sincerely yours.
Keith K. Okamoto. P. _.
Manager-Chief Engineer
RQ:dmj
Att. Manager-Chief Engineer's Report for Iki Place Water System improvement District,
Kohanaiki, North Kona. Hawaii
copy - (w/enc.) I lonorable Harry Kim, Mayor
(w/enc.) Water Board, County of k
dooms No. 87 _
RE • Re5. 1034-Ib 04n4-I0 hent) Ref. To: pL
Ref. Date NAR 2 2 201
. . Water, Our yvfost(Precious Resource. . . 7(a'Wai A lane . . .
The Department of Water Supply is an Equal Opportunity provider and employer.
•
IKI PLACE WATER IMPROVEMENT DISTRICT
Manager-Chief Engineer's Report
Department of Water Supply-County of Hawaii
March 10,2017
This report was prepared for Hawaii County Council Resolution No. 63416. pursuant to Hawaii County Code,
Chapter 12, Article 2,Subsection 12-10(a).
Department of Water Supply-County of Hawai`i
MANAGER-CHIEF ENGINEER'S REPORT
Iki Place Water Improvement District
Kohanaiki, North Kona, Hawai `i
March 10, 20/7
1. Introduction 3
A. Location
4
B. Purpose and Need 4
2. Character and Extent of Proposed Improvements 4
3. Proposed Method of Assessment 5
4. Land and Easements to be Acquired 5
5. Recommended Materials 5
6. Improvement District Boundaries 5
7. Estimated Cost of the Improvement 6
8. Necessary Plans, Data, and Detail 6
EXHIBITS
Exhibit A. Location Map
Exhibit B. Proposed Improvement District Boundaries
Exhibit C. Preliminary Design of Iki Place Water Improvements
Exhibit D. Proposed Assessment Roll for lid Place Water Improvement
Exhibit E. Detailed Project Cost Estimate
1. Introduction
This report has been prepared in response to Hawaii County Council Resolution No. 634-16,
Draft I, adopted October 5, 2016 ("Resolution"). The Resolution directed the Manager-Chief
Engineer of the Department of Water Supply ("DWS")to prepare and submit to the Council a
report containing the information required by Hawai`i County Code Chapter 12, Article 2,
Subsection 12-10(a)as follows:
(I) Preliminary data concerning the special improvement proposed to he opened,
constructed, or improved;
(2) The general character and extent of any improvement to he proposed;
(3) The proposed assessment trait and method of assessment;
(4) Whether any new land will be necessary to he acquired, and the estimated cost
thereof and the proportion of the cost which should be borne by the County;
(5) The materials reconunended to meet the conditions of the improvement;
(6) The boundaries of the proposed improvement district and any subdistricts or zones
therein as to which different portions of the cost of improvements should he charged;
(7) The estimated cost of the improvement, the portions of the cost to he 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 he made against each assessment unit
to be accessed;and
(8)All necessary plans and other data, details, and specifications Jnr the improvements
and any other matters or details intended to apply thereto.
The proposed improvement district,initiated by the Hawaii County Council, is for the design and
installation of a water system for Iki Place, located at Kohanaiki, North Kona(Project")that will
meet current State of Hawai`i, Water System Standards, 2002 as amended, for the County of
Hawaii ("DWS Standards"). The DWS will own, operate, and maintain the system. The
proposed improvements consist exclusively of a water system including the incidental restoration
of roadways, meeting the definition of a"water system improvement district' under Hawai
County Code(HCC) Chapter 12, Article I, Subsection 12-I.
u. 1 )5 \ I st
A. Location
Iki Place is located west of Mamalahoa Highway and south of Hualalai Vista Subdivision,
within the ahupua'a of Kohanaiki, North Kona District, island and County of Hawaii
("Project Area")(see Exhibit A). The subdivision was approved in 1962 and currently
consists of 18 lots ranging from 7,632 sq. ft.to 10,089 sq. ft. The current county zoning over
the entire subdivision including the roadway is A-3a(Agriculture, 3 acre lot size minimum).
There are IS lots with an existing dwelling and an active account for water service. The
subdivision was created prior to the enactment of the County Subdivision Code requiring
water system improvements. Therefore, each lot obtained water service from the DWS water
system from meters located at the intersection of Mamalahoa Highway and Hale Pule Road
(also known as "Church of God Road"), approximately 700 I.fmauka from Iki Place.
B. Purpose and Need
Each of the 15 lots within the Project Area has an existing service from the existing DWS
water system on Mamalahoa Highway above the subdivision through its own individual water
meter. These lots rely on customer water lines that traverse along Hale Pule Road and along
Iki Place. As these meters do not front the lots, they are considered Out of Bounds" where
the customer is responsible for maintaining their water line fronting and/or traversing
neighboring properties. Furthermore, there are currently no fire hydrants located along Iki
Place.
2. Character and Extent of Proposed Improvements
As the lots are "non-conforming" to the existing county zoning,the requirements of the water
improvements will be based on use and land area size, which is similar to county RS-7.5 zoning
(Residential Single, 7,500 s.f. minimum lot size).
The Project will be installed entirely within the existing private roadway, Iki Place and along
portion of Aniani Street. The proposed water system improvements would service IS lots within
the Project Area (see Exhibit B). An easement will be required over the private roadway for
maintenance and operation of the water system improvements, which will need to be dedicated to
the Water Board of the County of Hawaii.
In order to meet current DWS Standards for the RS-7.5 zoning, installation shall include(See
Exhibit C):
a. water mains capable of delivering water at adequate pressure and volume under peak-flow and
fire-flow conditions; minimum diameter of mains shall be 8-inches from an existing 8-inch
waterline within Aniani Street extending approximately 1,125 lineal feet along Aniani Street
to the northern boundary of the southernmost lot(TMK 7-3-019:010)
b. service laterals that will accommodate 5/8-inch sized meters to each lot,
c. existing service laterals must be cut and plugged at the main, and
. ,. !1 !; H i ni A i NV .. I
d. fire hydrants spaced no more than 600 feet apart and within 300 feet of the driveway or access
for each lot.
The waterline will be installed in trenches to a depth of approximately 3-ft. The roadway within
Iki Place will be restored to the existing pavement width while the roadway within Aniani Street
will be restored over an entire lane(i.e.,not limited to a patch over the trench).
The property owners will be responsible for the improvements on their private property to connect
or re-connect their plumbing to the new service.
3. Proposed Method of Assessment
The"assessment unit"as defined by HCC Chapter 12 is a subdivided parcel or condominium unit
with a unique tax key number. Each assessment unit within this improvement district will be
subject to a special assessment. There are 18 single-family lots and no condominium units. The
unit cost per assessment unit will be determined by equally dividing the total project costs by the
18 assessment units. Each assessment unit will require one(I) unit of water, which is equivalent
to an average use of 400 gallons per day.
Currently. there are three (3) vacant lots that do not have water service, which would also be
required to pay the prevailing Facilities Charge, aside from the special assessment. This charge
however, will be the responsibility of the owner/applicant at the time water service is requested for
and is not factored in to the assessment unit. The current cost for the Facilities Charge is
$1,190.00 for each of the three(3) vacant lots.
4. Land and Easements to be Acquired
Iki Place is an existing private road,and therefore,an easement covering the entire roadway lot
will be required as all of the proposed improvements appear to be able to occur within the Iki
Place lot.
5. Recommended Materials
The recommended materials for the water system improvements shall meet the requirements of
the DWS Standards. Also, all backfill and asphalt pavement materials shall meet the requirements
of the Department of Public Works, County of Hawaii. The roadway will be restored to the
existing pavement width (i.e., nut limited to a patch over the trench).
The property owners will be responsible for the improvements on their private property to connect
their plumbing to the new service.
6. Improvement District Boundaries
The Improvement District boundaries were determined by boundaries of the subdivision that
created the 18 lots. All of the lots in the proposed Improvement District boundaries will receive a
direct benefit of having their own individual DWS meter front their lot,eliminating the need to
maintain private customer lines within Hale Pule Road as well as along Iki Place,fronting other
I!
properties. Fire hydrants will be installed within Iki Place benefitting all 18 assessed lots. (See
Exhibit D).
7. Estimated Cost of the Improvement
The total project cost—including planning/preliminary studies,design,construction, and
financing—is estimated as follows:
Mobilization/Demobilization $15,000
Water System $272,600
Paving Restoration $156,395
Subtotal $443,995
Contingency(^'20%) $88,800
Total Construction Cost $532,795
Planning/Preliminary Study/Design $ 80,000
Environmental Report $30,000
Legal Fees/ID Formation $45,000
Misc(-4%of Construction Cost) $ 21,300
A more detailed breakdown of the construction cost is in Exhibit E.
8. Necessary Plans, Data, and Detail
All necessary preliminary plans and other data,and details for the improvements and any other
matters or details intended to apply thereto are contained in the exhibits listed below and appended
to this report. The information in this report and the exhibits are in such form and contain such
information as is reasonably necessary to inform the owners of assessment units and other
interested parties at least generally of the nature and scope of the proposed water system
improvements to be constructed and installed in the Improvement District.
1. Exhibit A. Location Map
2. Exhibit B. Proposed Improvement District Boundaries
3. Exhibit C. Preliminary Design of Iki Place Water Improvements
4. Exhibit D. Proposed Assessment Roll for Ilci Place Water Improvement
5. Exhibit E. Detailed Project Cost Estimate
wom
Keith Okamoto, P.E.
Manager-Chief Engineer,Department of Water Supply
DEPARTMENT OF WATER SUPPLY-COUNTY OF HAW,All 6
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Iki Place Improvement District
Proposed Assessment Roll
Tax Map Key Owner Situs Address Mainling Address
73019002 AUREN,DEAN E 73-4518 IKI PLACE 73-4518 IKI PL
KAILUA KONA, HI 96740-8213
73019003 KORONA,JOHN E JR 110 PLACE 511 S ST ASAPH ST
ALEXANDRIA,VA 22314-4116
73019004 FITZGERALD,NANCY 73-4526 IKI PLACE 74-5615 LUHIA ST#AIB
KAILUA KONA, HI 96740-3622
73019005 WILK,RICHARD R IKI PLACE 3825 5 OAK RIDGE DR
BLOOMINGTON, IN 47401-8932
73019006 ANDERSON,LEIF JOHN 73-4532 IKI PLACE 73-4532 IKI PL
KAILUA KONA, HI 96740
73019007 OLD,DAVID W IKI PLACE PO BOX 5306
KAILUA KONA, HI 96745-5306
73019008 HECHT,DEBORAH A 73-4540 IKI PLACE 73-4540 IKI PL
KAILUA KONA,HI 96740
73019009 SHERMAN,KIMOTHY K 73-4544 IKI PLACE 74-4910 HAO KUNI PLACE, LOT S
KAILUA KONA, HI 96740
73019010 THERIAULT,GARV IKI PLACE P O BOX 5519
KAILUA KONA, HI 96745
73019011 VARIOUS OWNERS SR-ROADWAY
73019012 RUTLEDGE,DANEEN TRUST 73-4547 IKI PLACE 73-4547 HAWAII BELT HWY
KAILUA KONA, HI 96740
73019013 BEN,GERALD A 73-4543 IKI PLACE 73-4543 MAMALAHOA HWY
KAILUA KONA, HI 96740
73019014 BREHAUT,CHRISTY ELLEN TRST 73-4539 IKI PLACE 75-5695 ALII DR STE D
KAILUA KONA, HI 96740-3113
73019015 NANNESTAD,JEFFREY SCOTT 73-4535 IKI PLACE 73-4539 MAMALAHOA HWY
KAILUA KONA, HI 96740
73019016 RUMPEL,JOHN DAVID 73-4531 IKI PLACE 73-4531 IKI PL
KAILUA KONA, HI 96740-8212
73019017 SHORTE,KIRK 73-4529 IKI PLACE 73-4529 IKI PL
KAILUA KONA, HI 96740-8212
73019018 TAMASHIRO,ERNEST/NAOMI TRST IKI PLACE 4250-C KANAELE RD
KAPAA, HI 96746
73019019 CALDWELL,STEPHEN WARREN 73-4521 IKI PLACE 9000 CROW CANYON RD#132
DANVILLE, CA 94506
73019020 WILSON,RICHARD A 73-4517 IKI PLACE PO BOX 2109
KAILUA KONA, HI 96745
EXHIBIT D
Iki Place Improvement District
WATER SYSTEM INSTALLATION COST ESTIMATE
TMK 7-3-19:011 & 037
ITEM QUANTITY UNITS UNIT PRICE AMOUNT
A. CONSTRUCTION COST
Project Mobilization,and Demobilization.
Not to exceed$ 15,000 Lump Sum $15,000
8"D.I. Pipe 1,125 I.f. $140 $157,500
8"90° C.I. Bend, M.J. 1 ea. $600 $600
e"x8"C.I.Tee, M.J. 1 ea. $850 $850
8"x6"C.I. Tee, M.J. 3 ea. $800 $2,400
6"x6"C.I.Tee, M.J. 1 ea. $750 $750
8"Gate Valve&Box 1 ea. $2,700 $2,700
6"Gate Valve&Box 2 ea. $2,350 $4,700
8"Solid Body Sleeve 2 ea. $700 $1,400
6"Solid Body Sleeve 2 ea. $600 $1,200
Fire Hydrant Type B 2 ea. $9,000 $18,000
1"Air Relief Valve Unit&Box 1 ea. $3,000 $3,000
1"Type"A"Lateral 2 ea. $4,000 $8,000
1.5"Type"C" Lateral 8 ea. $4,500 $36,000
Cut and Plug Existing Service Laterals 15 ea. $900 $13,500
Connections to existing waterline 1 ea. $7,000 $7,000
Chlorination and Testing Lump Sum $15,000
Pavement Repair
2-inch min AC(one-lane)Aniani Street 444 sy $80 $35,520
2-inch min AC(12-ft wide road)Iki Place 967 sy $125 $120,875
CONSTRUCTION COST $443,995
Contingency(20%) 88,800
TOTAL CONSTRUCTION COST $532,795
B. OTHER COSTS
Consultant Fee' 80,000
Planning/Environmental Report 30,000
Legal Fees 45,000
Miscellaneous Costs' 21,300
TOTAL OTHER COSTS $176,300
(TOTAL ESTIMATE IMPROVEMENT DISTRICT COST $709,09511
• Percentage of total construction cosi
EXHIBIT E