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8,900 sq mi (23,000 km 2) [5] Red Bluff Diversion Dam is a disused irrigation diversion dam on the Sacramento River in Tehama County, California, United States, southeast of the city of Red Bluff. Until 2013, the dam provided irrigation water for two canals that serve 150,000 acres (61,000 ha) of farmland on the west side of the Sacramento Valley.
Automatic fish counters are automatic devices for measuring the number of fish passing along a particular river in a particular period of time. Usually one particular species is of interest. One important species studied by fish counters are Atlantic salmon. This species is of interest owing to its ecologically vulnerable status and anadromous ...
April 13, 1977. Designated CP. November 13, 1984. The Great Stone Dam (also called the Lawrence Dam or Lawrence Great Dam) was built between 1845 and 1848 [2] on the site of Bodwell's Falls [3] on the Merrimack River in what became Lawrence, Massachusetts. The dam has a length of 900 feet (270 m) and a height of 35 feet (11 m).
It was completed in 1951 alongside the dam for the hydro-electric power station as part of the Tummel hydro-electric power scheme and was installed in 1952. It was the first of its type in Scotland. The fish ladder consists of 34 separate pools, each 50 centimetres (1.6 ft) higher than the last and covering a distance of 310 metres (340 yd).
The American paddlefish ( Polyodon spathula, also known as a Mississippi paddlefish, spoon-billed cat, or spoonbill) is a species of ray-finned fish. It is the last living species of paddlefish (Polyodontidae). This family is most closely related to the sturgeons; together they make up the order Acipenseriformes, which are one of the most ...
Apr. 3—An investigation into what killed thousands of fish at Long Lake Dam in February ruled out some potential causes, but it was unable to definitively pinpoint the reason so many fish turned ...
In recent years, shad counts at Bonneville and The Dalles Dams have ranged from over two million to over five million fish per year. Spawning shad return to the Columbia in May and June and migrate above Lower Granite Dam on the Snake River and above Priest Rapids Dam on the Upper Columbia. Unlike many introduced species, American shad have not ...
The Japanese kokanee, also known as the kunimasu salmon or black kokanee, is considered a subspecies of the sockeye salmon by some, or even a separate species Oncorhynchus kawamurae, and occurs naturally in Lakes Akan and Chimikeppu on Hokkaido Island. [6] The creation of a dam caused the extermination of the fish by changing the lake pH.