1 Brightwater Conveyance System University of Washington Brightwater Conveyance System University of Washington October 24, 2008 • Founded in 1917 • Over 7,500 employees worldwide • Ranked number 16 by Engineering News-Record • 400 Staff Locally • Major Projects: • 520 • 405 • Alaskan Way HDR North America Office Locations King County Regional System 420 square mile service area Serves 32 cities & 2 million people 2 regional treatment plants 2 combined sewer overflow treatment plants 1 small treatment plant on Vashon Island 330 miles of conveyance pipe 42 pump stations 19 regulator stations Need for the Brightwater project Growth and economic development h At capacity by 2010 h 1 million new people by 2030 h 56 mgd capacity needed by 2030 Recycle opportunities h Reclaimed water, biosolids & methane Brightwater Treatment System cost $1.6 billion dollars Brightwater Siting Process Four year process - 3 phases h Identify potential plant locations & evaluate using siting criteria h Identify systems (plant, conveyance system, & outfall) h Environmental review of 2 selected alternatives (EIS) Everett Seattle Woodinville Rte 9 - 195th St Rte 9 - 228th St Unocal Final Conveyance Routes
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Brightwater Conveyance SystemUniversity of Washington
Brightwater Conveyance SystemUniversity of Washington
October 24, 2008
• Founded in 1917
• Over 7,500 employees worldwide
• Ranked number 16 by Engineering News-Record
• 400 Staff Locally
• Major Projects:• 520• 405 • Alaskan Way
HDR North America Office Locations
King County Regional System
420 square mile service areaServes 32 cities & 2 million people2 regional treatment plants2 combined sewer overflow treatment plants1 small treatment plant on Vashon Island330 miles of conveyance pipe42 pump stations19 regulator stations
Need for the Brightwater project
Growth and economic developmentAt capacity by 20101 million new people by 203056 mgd capacity needed by 2030
5,420 feetTwin 63-inch HDPE520-foot diffusers600 feet deep
Point Wells Marine Outfall
Controlled submergence
Regulatory ProcessPermitting involves:
4 federal agencies5 state agencies 2 counties 6 cities3 Indian tribes
Permitting started in early 2003More than 100 permits/approvals requiredEIS developed to meet State Environmental Policy Act requirements (4-year process)