Events prompting construction Spring Creek Dam

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contaminated sludge draining spring creek keswick reservoir created change in hue of surface.


spring creek dam begun in 1961, when company named gibbons , reed awarded contract. clearing operations began in july of same year, , dam officially dedicated bureau of reclamation on september 12, 1961. construction of dam began on october 20, 1961, placing of dam embankment, @ least partially consists of acidic sediment dredged spring creek. riprap laid on upstream face of dam beginning november 9 of year. in 1962, series of labor strikes impacted communities in central valley, affecting construction of dam, temporarily halted on may 3 of year. after work restarted on june 26, pervious core material dam out of supply, impervious material used complete dam core.


eventually, iron mountain mine closed, pollution continued , still continues, , in 1983, iron mountain mine listed on national priorities list. iron mountain mine known having acidic naturally found water content on earth, samples having −3.6 ph value when tested in 1990s, 100 times acidity of battery acid. however, ph value found inside , near mine, average ph of water entering spring creek reservoir 4.12.








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