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Pool-and-weir fish ladder at Bonneville Dam on the Columbia River Drone video of a fish way in Estonia, on the river Jägala FERC fish ladder safety sign. A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon, is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as ...
The weir has adversely impacted on the cultural integrity of the fish traps and on the ecology of the river. The weir, and the fishway that was included in the original construction, also changed the flow pattern through the traps. The weir evenly distributed flow across the river where beforehand it followed a channel near the south-east bank.
A fishing weir, fish weir, fishgarth [1] or kiddle [2] is an obstruction placed in tidal waters, or wholly or partially across a river, to direct the passage of, or trap fish. A weir may be used to trap marine fish in the intertidal zone as the tide recedes, fish such as salmon as they attempt to swim upstream to breed in a river, or eels as ...
The Sebasticook Lake Fishweir Complex is a series of prehistoric fishing weir structures submerged in the waters of Sebasticook Lake in Newport, Maine.With radiocarbon dates as far back as 3000 BCE, it is one of the oldest structures of its type in North America, and the only one in eastern North America that has been directly dated.
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The heart or arrow-shaped tidal stone weir is one of the ancestral fishing technologies of the seafaring Austronesian peoples, and similar ancient stone weirs are also widespread throughout Austronesian regions, including the Philippines, eastern Indonesia, Micronesia, Melanesia, and Polynesia, with examples being found as far as Hawaii.
Heavy water flows during the winter have eroded the foundation of the weir and piers, prompting major repairs in 1963, 1982, 1986, and 1999. Erosion holes in the weir were a major problem because they allowed adult Chinook salmon to pass through the weir, defeating its purpose and preventing the salmon from reaching the Hatchery's fish ladder ...
Bachelor Nation star Michelle Money and professional golfer Mike Weir tied the knot after seven years of dating. “I am so excited to look Mike in the eyes in front of our girls and commit myself ...
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