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California sea lions are also attracted to the large number of fish, and are often seen around the base of the dam during the spawning season. [14] By 2006, the growing number of sea lions and their impact on the salmon population had become worrisome to the Army Corps of Engineers and environmentalists.
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Many local people and fish enthusiasts — like California Trout — have been trying to tear down Matilija Dam for years and reopen the spawning grounds. The reservoir is 99% filled with crud ...
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A special fish barrier dam was built to lead salmon and steelhead, returning to spawn, into the Feather River Fish Hatchery. The California Office of Environmental Health Hazard Assessment (OEHHA) has developed a safe eating advisory for fish caught in the Thermalito Forebay and Afterbay based on levels of mercury or PCBs found in local species ...
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Salmon and Steelhead trout travel from the ocean upriver to various spawning grounds. The construction of multiple dams on the Columbia threatened this fishery as the fish struggled to complete the migration upstream. [48] All dams on the Columbia River downstream of Chief Joseph have fish ladders installed, from Wells to Bonneville Dam.
Thompson was 7 when she saw the dead fish floating in the river, and that memory has stayed with her. She saw it as evidence that dam removal was essential for restoring the river's health.