PD Background Report Kamehameha Schools (PL-SPP-2023-037)

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and that they determine the applicability of other DOT permits for the proposed development. 24. Water: County water is available to the permit area via an existing, 8-inch water main within Mamalahoa Highway with each of the subject properties serviced by an existing, 5/8"water meter, which allows an average daily usage of 400 gallons of water per day (gpd) and a maximum of 600 gpd. According to the application, the projected daily water demand would be approximately 4,000 to 6,000 gpd. According to the Department of Water Supply (DWS), based on current water availability, the additional anticipated water demand was not available for the existing water system. DWS requested that the applicant submit estimated maximum daily water use calculations for the proposed uses, prepared by a professional engineer licensed in the State of Hawaii, for review and approval. The calculations should indicate that the anticipated water use will be within the allotted amount of water for the properties. Finally, DWS indicated that the existing 8-inch water main is inadequate to provide the required 2,000 gallons per minute required for the proposed use and that the applicant shold consult with the Fire Department to determine other fire protection requirements and alternatives. By letter dated July 6, 2023, the applicant's engineers proposed fire protection improvements for the project including the installation of two (2)fire hydrants fronting the permit area approximately 90 feet apart to meet the fire flow requirements and the installation of an adequate Fire Department Access Road (FDAR) on site. By email dated July 7, 2023, the Fire Department indicated that the proposed improvements meet Fire Code requirements. Additionally, by letter date July 7, 2023 to DWS, the applicant's engineers provided estimated maximum daily water use calculations for the project consisting of an estimated average of 590 gpd and a maximum of 885 gpd. Additionally, the applicant provided information from a KS preschool on Oahu with 6 classrooms and 120 students. The analysis indicated that the highest daily rate measured over the last five (5)years from that facility was 870 gpd and that the average flow rate for the five (5) highest months was 737 gpd. Finally, the applicant proposes to provide the following water system improvements to accommodate the project: replacing two existing 5/8-inch water meters with a 1 1/z-inch domestic water meter, install a 2-inch diameter water lateral, and a 7