138:, as years of the naval shipyard's activities have degraded the area. Peak concentrations of mercury, according to dated sediment cores from the inlet, occurred around World War II. The contamination decreased following WWII due to better metallurgical management practices and increased environmental regulations. However, the concentrations of mercury have decreased slowly because the sedimentation rate is relatively slow. From 2000 to 2001, remedial dredging attempted to decontaminate the site, and indicators suggest this had a significant positive effect on the inlet as a whole. Still, total mercury concentrations in unfiltered water from the Sinclair Inlet were roughly three times higher than those of central Puget Sound.
160:. The tribe estimated that 730 cubic yards of material were removed during the hull-scraping. In January 2020, the Navy reached a resolution with the tribe, agreeing to pump a layer of sand at least 10 centimeters thick into the area where the Independence was harbored. The agreement also contained a provision for a 10-year moratorium of hull-scapings, because of the harmful pollutants scraped into the inlet, including copper and zinc. The agreement is particularly pertinent given plans to scrape the hull of the
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In the 1980s, the sediment of
Sinclair Inlet was found to have elevated concentrations of organic compounds. A remedial investigation of the waters around the naval complex at Bremerton took place in 1996. The goal of the sediment clean-up was mainly to reduce the risk for humans of consuming
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Over 20 streams of various sizes drain into
Sinclair Inlet, the largest being the Gorst, Blackjack, Anderson, and Wright Creeks. The embayment is triangular, about 1.9 km across and 6.4 km long. It is a tidally dominated, non-stratified, saline body, due to a low inflow of freshwater.
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Sinclair Inlet has been significantly modified by human encroachment. Shallow water habits have been altered or lost, riparian vegetation along the shoreline has decreased, and both sediment and water quality have declined.
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233:"USGS Data Series 658: Mercury Species and Other Selected Constituent Concentrations in Water, Sediment, and Biota of Sinclair Inlet, Kitsap County, Washington, 2007–10"
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Sinclair Inlet (left), Dyes Inlet (upper right) and
Manette and Warren Avenue Bridges across Port Washington Narrows (right center)
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258:"Mercury in Sediment, Water, and Biota of Sinclair Inlet, Puget Sound, Washington, 1989-2007"
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209:"Juvenile Salmon use of Sinclair Inlet, Washington in 2001 and 2002"
149:, as a consequence of scraping the hull of an aircraft carrier, the
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Paulson, Anthony J.; Keys, Morgan E.; Scholting, Kelly L. (2010).
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Gorst Creek and
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186:"Puget Sound Naval Shipyard, Sinclair Inlet | CoastView"
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329:2022-02-25
324:Kitsap Sun
242:2022-02-25
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191:2022-02-25
171:References
164:Kitty Hawk
60:Dyes Inlet
162:USS
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