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6.20.310 General.
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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 district drafting standards.

Project plans shall have a horizontal scale of one inch equals 50 feet, unless approved by the district. Plans shall show:

(1) Locations of streets, rights-of-way, existing utilities, and water system facilities.

(2) Ground surface, dimensions, pipe type and size, water valves, fittings, hydrants and appurtenances.

(3) All known existing structures, both above and below ground, that might interfere with the proposed construction, particularly sewer lines, gas mains, storm drains, overhead and underground power lines, telephone lines, and television cables.

(4) All utility easements.

(5) District approval block.

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

The water system facilities shall be constructed in conformance with the current 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 and plumbing 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. The developer shall verify and protect all underground and surface utilities encountered during the progress of this work.

All pipelines shall be tested and disinfected to district and AWWA standards prior to acceptance.

Before acceptance of the water system by the district, all pipes, assemblies, and other appurtenances shall be cleaned of all debris and foreign material. After all other work is completed and before final acceptance, the entire roadway, including the roadbed, planting, sidewalk areas, shoulders, driveways, alley and side street approaches, slopes, ditches, utility trenches, and construction areas shall be neatly finished to the lines, grades, and cross sections for a new roadway consistent with the original section. [Res. 735 § 1, 2017.]

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