AWWA DSS58697

Tacoma Water's Second Supply Project will finally bring the needed water to the South KingCounty and Pierce County areas. It has taken over three decades to acquire the propertyrights, approvals, agreements, permits and funding for the project. In the mid-1980s threeSouth King County utilities (Lakehaven Utility District, Covington Water District and theCity of Kent) joined Tacoma as partners in the project.The project involves a 34 mile long steel transmission main, additions and improvements tothe Green River diversion facilities, new water treatment facilities, additional water storagebehind the Corps of Engineer's Howard Hanson Dam and numerous environmentalenhancement projects. The Green River has provided the primary water supply by gravity flow to Tacoma throughPipeline No. 1 since 1913. Since then Tacoma has supplemented the river supply with nearbygroundwater supplies during the higher demand periods of the summer. As a result, Tacomahas extensive experience with the blending of the two supply sources and has implementedoperating procedures and treatment to assure acceptable water quality. However, the otherproject partners have little or no experience integrating surface water into their existing wellsupply systems. This paper presents some of the special water qualityconsiderations the other three project partners are making. Includes table, figure.

Product Details

Edition:

Vol. - No.

Published:

10/01/2003

Number of Pages:

6

File Size:

1 file , 840 KB