COM 1078.000 2018-2020 - Laserfiche WebLink

Home

25. Drainage: The applicant will comply with the requirements and recommendations of the Department of Public Works (DPW) which include the submittal of detailed drainage studies and following the requirements of Chapter 27 — Floodplain Management of the Hawaii County Code. A culvert and related drainage improvements will be constructed within the AE designated area (Splitway #2) to allow for a road connection between the northern and southern sections of the property. A Conditional Letter of Map Revision (CLOMR) to allow for this current improvement and adjustments to the FIRM has been submitted for review and approval by the FEMA. The applicant has prepared two (2) construction plans: 1) DOT Drainage Culvert Improvements, and 2) Pualani Makai Flood Channel which were developed and coordinated to address the road and drainage requirements of the proj ect area. Currently, there is an 8 -foot wide pipe that crosses the extension of the Queen Ka` ahumanu Highway in the vicinity of the project site. This DOT installed system is undersized, therefore the DOT subsequently approved the DOT Drainage Culvert improvements plan that recommends a bigger culvert (20 -feet wide) and a 40 -foot wide concrete U-shaped channel from the Highway into a 2 -acre, 25 -foot deep retention basin near Kuakini Highway. As there will be an added level of impervious surface resulting from the proposed development, there may be an issue relating to potential increased run-off. In that event, drywells or similar types of accommodations will be implemented, subject to the review and approval of DPW and the DOH via the Underground Injection Control (UIC) and National Pollution Discharge Elimination System (NDPES) permit process. 26. Essential Utilities and Services: Electricity and telephone services are available to the site. The Kealakehe Police Station is located less than 3 -miles north of the project site. There are three (3) fire stations within five (5) miles from the site, including Kailua-Kona, Kealakehe, and Pu`uola. The Kona Hospital is located in Kealakekua. AGENCIES AND ORGANIZATIONS' COMMENTS 27. State Dept. of Transportation: (Planning Department Exhibit 6 — January 10, 2020 Letter) 28. State Dept. of Health — Env. Health Program: (Planning Department Exhibit 7 — December 20, 2019 Memo) 29. Dept. of Water Supply: (Planning Department Exhibit 8 — January 8, 2020 Memo) 0