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Detailed plans shall be submitted for the district’s review which provide the locations, size, and type of the proposed water system and points of connection. These plans shall be separate from sewer plans and shall conform to the current district plan preparation requirements.

Computations and other data used for design of the water system shall be submitted to the district for approval as appropriate and required by the district.

The water system facilities shall be designed and constructed in conformance with the current State Department of Health Water System Design Manual and WSDOT Standard Specifications for Road, Bridge, and Municipal Construction and amendments thereto, revised as to form to make reference to local governments and as modified by the district’s requirements and standards.

Material and installation specifications shall contain appropriate requirements that have been established by the industry in its technical publications, such as ASTM, AWWA, WEF, and APWA standards. Requirements shall be set forth in the specifications for the pipe and methods of bedding and backfilling so as not to damage the pipe or its joints.

Except as otherwise noted herein, all work shall be accomplished as recommended in applicable American Water Works Association (AWWA) standards, and according to the recommendations of the manufacturer of the material or equipment concerned.

All piping, plumbing and connection materials (i.e., solder) installed to provide water for human consumption that is connected to the district’s water system shall be lead free.

The location of the water mains, valves, hydrants, and principal fittings including modifications shall be staked by the developer. No deviation shall be made from the required line or grade unless otherwise approved by the district. The developer shall verify and protect all underground and surface utilities encountered during the progress of this work.

Before final acceptance of the water system by the district, all pipes, assemblies, and other appurtenances shall be cleaned of all debris and foreign material, and tested and disinfected to district and AWWA standards. The impacted public right-of-way area shall be constructed or restored to the satisfaction of the land use agency.

The district shall own, operate, and maintain the public water system within the public right-of-way (ROW) and/or dedicated district utility easement including the main line, service line and water meter. The private water system on the backside of the water meter, or within a building or beyond the ROW or easement line if not metered, shall be the responsibility of the property owner, including all internal and external backflow assemblies. [Res. 835 § 1 (Exh. 1), 2022; Res. 735 § 1, 2017.]