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The rivers of the Pacific Coast states are heavily altered by dams and diversions ( over 1,400 dams in California, 1,039 in Oregon, 1,174 in Washington ). The dams generally are used for hydropower generation, irrigation, and transportation, all essential to supporting the region’s extensive agricultural and manufacturing (aluminum, aircraft, shipbuilding) industries. Dams create problems for fish such as salmon and steelhead by interrupting or halting their migration from the Pacific to upstream habitats and killing large numbers of young salmon (smolts) as they move downstream through powerhouses or spillways. Numbers of salmon and steelhead have declined drastically from historic levels, and many populations...
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Dams and other barriers are having a significant effect on fish habitat in the Upper Midwest. More than 3,700 dams have been constructed on Wisconsin’s warm water streams. Similarly, there are 2,500 listed dams in Michigan and likely a similar number that are not in the dam safety database for that state. In the Lake Michigan watershed alone, dams, culverts, and road crossings that impede fish migration have reduced nearly 19,000 miles of accessible stream habitat to only 3,300 miles. With many Great Lakes fish species using tributaries as spawning and nursery habitats, these barriers are a significant factor impairing the full recovery of fish populations in the Great Lakes. Similar fragmentation occurs on other...
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The United States is home to a diverse array of freshwater and marine fish, shellfish, and other aquatic species. More than 3,000 species of fish inhabit America’s streams, rivers, lakes, reservoirs, marshes, swamps, bays, estuaries, coral reefs, seagrass beds, shallow water banks, deep ocean canyons, and other aquatic habitats. The United States is also home to more than 322 million people, 39% of whom live near the coasts and all depending on the same water that fish call home. In 2012, approximately 25 percent of the nation’s acreage was agricultural and 6 percent was developed. However, these and other consequences of human inhabitation affect much broader areas by altering water flow (hydrology), water quality,...
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For more about specific waters and projects the Hawaii Fish Habitat Partnership is working on, please see the following locations: Community-Based Restoration of the Kiholo Estuary-Fishpond Complex, Hawaii – see featured article Waipa Stream, Kauai – see featured article Lower He’eia Stream, Hawai’i Waipa Stream, Hawai’i
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Texas has flown flags for six different nations, which complicates fisheries management in this region. Spain 1519-1685 France 1685-1690 Spain 1690-1821 Mexico 1821-1836 Republic of Texas 1836-1845 United States 1845-1861 Confederate States 1861-1865 United States 1865 to present More land is farmed in Texas than in any other State. Texas has 624 miles (1,024 kilometers) of coastline along the Gulf of Mexico. The Trinity River is 710 miles (1,140 kilometers) long and is the longest river that flows entirely within the State of Texas. Original Federal plans called for building 36 locks and dams from Trinity Bay near Houston to Dallas but only 7 were built. The Brazos River is translated as "The River of the Arms...


map background search result map search result map Fish Habitat Partnership Activities for Hawaii Description of Dams and Other Barriers as a Human Activity Affecting Fish Habitat in Upper Midwest States Facts About Southern Plains States Description of Dams and Diversions Use as a Human Activity Affecting Fish Habitat in Pacific Coast States Description of Dams and Other Barriers as a Human Activity Affecting Fish Habitat in Upper Midwest States Description of Dams and Diversions Use as a Human Activity Affecting Fish Habitat in Pacific Coast States Facts About Southern Plains States Fish Habitat Partnership Activities for Hawaii