kimerajamm
Joined: 28 Nov 2010
Posts: 785
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 Posted: Sat Mar 05, 2011 12:39 am Post subject: auxiliary spillway |
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Some of the water in the Little Butte Creek watershed is diverted for irrigation in the Rogue Valley and to supplement Bear Creek, both roughly 15 miles (24 km) to the southwest.[3] In the late 19th century, many orchards were planted near Ashland. They were initially irrigated by Bear Creek, however, there was not enough water to satisfy the orchards' needs. In 1898, the Fish Lake Water Company was established to correct the situation. The company proposed to create Fourmile Lake and enlarge Fish Lake by impounding Fourmile Creek and the north fork of Little Butte Creek, respectively, and connecting them via the Cascade Canal. Construction of the temporary Fish Lake Dam began in 1902. Around this time, construction of the Joint System Canal to the west also began. Construction of Fourmile Lake Dam started in 1906, along with the Cascade Canal. Many other small canals, such as Hopkins Canal and the Medford Canal, were also built in the Rogue Valley around this time.[44] Fish Lake Dam was completed in 1908, creating the 7,836-acre-foot (9,666,000 m3) reservoir.[45][46]
The Cascade Canal was completed in 1915, delivering about 5,462 acre feet (6,737,000 m3) of water from Fourmile Lake in the Klamath River watershed 4.5 miles (7.2 km) to Fish Lake in the Rogue River Watershed.[6][44][47] The temporary Fish Lake Dam was also replaced by a permanent earthfill dam.[6][44] It was later modified in 1922 and 1955.[45][48] In 1996 an auxiliary spillway was added. The dam stands 50 feet (15 m) high and has a length of 960 feet (290 m).[48]
In 1956, the United States Bureau of Reclamation awarded a contract to Lord Brothers, from Portland, Oregon, to build the Deadwood Tunnel. The tunnel was finished in 1957.[44] Howard Prairie Lake was completed in 1958, and is located about 18 miles (29 km) east of Ashland.[44] Excess water is diverted from the south fork, Beaver Dam Creek, and two of its tributaries 8.6 miles (13.8 km) south into the Deadwood Tunnel to supplement the lake and the surrounding regions.[6][39][49] Dead Indian Creek is also diverted into Howard Prairie Lake.[6] About 21.4 cubic feet per second (0.61 m3/s) annually, or about 16,500 acre feet (20,400,000 m3), was diverted into the Klamath River watershed between 1962 and 1999.[6][47]mobile phone plans
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