Casad Dam is a concrete arch dam in Bremerton, Kitsap County, Washington), built starting in 1955 and completed in 1957.[6][7]

The dam is Kitsap County's only major water diversion structure,[8] impounding Union River to form a reservoir that is the source of over half of Bremerton's municipal water supply.[5] The water is gravity fed from the reservoir at 607 feet (185 m) in the hills[3] to the city, most of which is at or near sea level.[9]

Bremerton owns 95% of the land in its 3,000-acre (1,200 ha) watershed, and the Union River reservoir behind Casad Dam holds 1,400,000,000 US gallons (5,300,000 m3) of water.[6] The city is unusual in drawing most of its water supply from an open air source, the reservoir, which can occasionally be affected by algal blooms.[10]

The dam's intake tower underwent seismic retrofit in 2012 to withstand a 0.78 g peak acceleration in a maximum credible earthquake from the Seattle Fault which runs about four miles (7 km) away, on the north side of Green Mountain.[11][12]

References

  1. ^ Secondary use as flood control: Garrett W. Jackson (February 2008), Site and Reach Assessment, Union River At SR 300 (PDF), Washington State Department of Transportation Environmental Services, archived from the original (PDF) on 2014-09-02
  2. ^ C. Cliff Casad; John W. Cunningham (May 2, 1957), "Construction of the Union River Dam at Bremerton, Wash.", Journal (American Water Works Association), 50 (1), American Water Works Association: 105–109, JSTOR 41254984
  3. ^ a b U.S. Geological Survey Geographic Names Information System: Union River Reservoir
  4. ^ U.S. Geological Survey Geographic Names Information System: Casad Dam
  5. ^ a b Casad Dam factsheet, City of Bremerton Public Works and Utilities, archived from the original on 2014-12-23, retrieved 2014-10-23
  6. ^ a b Bremerton's water history, City of Bremerton, archived from the original on 2012-11-11, retrieved 2014-10-23
  7. ^ State of Salmon in Watersheds 2012 Report, State of Washington Recreation and Conservation Office and Governor's Salmon Recovery Office, 2012, archived from the original on 2014-11-20, retrieved 2014-10-24
  8. ^ Kitsap County initial basin assessment (PDF), Kitsap County Public Utility District, October 1997, archived from the original (PDF) on 2014-10-24, retrieved 2014-10-24
  9. ^ Josh Farley (February 17, 2013), "In Bremerton, cascade of utility rate hikes awaits", Puget Sound Blogs, Kitsap Sun, archived from the original on October 24, 2014, retrieved October 24, 2014
  10. ^ "Algae bloom caues 'metallic' taste in Bremerton's water supply", Puget Sound Blogs, Kitsap Sun, June 5, 2014
  11. ^ Kimberley Robinson (August 2012), "Brace Yourself! Novel Uses for the Buckling Restrained Brace", Structure, National Council of Structural Engineers Associations, archived from the original on 2014-10-24
  12. ^ Lee M. Liberty (June 30, 2009), The western extension of the Seattle fault: new insights from seismic reflection data (PDF), U.S. Geological Survey, archived from the original (PDF) on 2017-01-28, retrieved 2017-08-28


Allikas: http://en.wikipedia.org/wiki/Casad_Dam
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