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Glen D. Palmer Dam
The Glen D. Palmer Dam is a dam across the Fox River in Yorkville, Illinois, about 35.9 miles (58.2 km) upstream from the confluence with the Illinois River, and 940 feet (366 m) upstream from the Route-47 bridge. The dam is named after the original manager of the State Game Farm, formerly located in Yorkville.〔 〕
There has been a dam at this site since the early 19th century.〔 〕 Kendall County was established on February 19, 1841 and the government township (37 North, Range, 7 East) plat was signed on August 25, 1842. Labeled on this plat are: "Howe's Mill Dam" and a sawmill on the south side of the river. Surveys taken in 1837 and 1838, show there was a dam across the Fox River at Yorkville as part of a mill, near the present dam location. Records indicate that the Yorkville mill buildings were destroyed by fire. In 1915 an old "wood crib" dam existed across the Fox River, with a head-race on the south side of the river. It collapsed subsequent to a Spring flood. Its ruins remained submerged and decomposing, until such time as the current dam was built in 1962, as a part of the Stratton project〔 dam system which was designed to keep the river navigable from the Wisconsin border to the confluence with the Illinois River. The original dam had a modified ogee crest and a spillway length of , which created turbulence at the base of the dam.〔(【引用サイトリンク】title=Glen D. Palmer Dam Canoe/Kayak Chute Update )〕 As a result, there were a number of fatal accidents caused when kayakers or canoers sailed over the dam, and at least 26 people〔(【引用サイトリンク】title=Yorkville / Glen Palmer Dam Alternative Analysis and Preliminary Design ) 〕 have drowned at the dam.
In 2006, the Illinois Department of Natural Resources started to renovate the dam changing the shape of the spillway and adding a fish ladder and an fish/ canoe bypass channel.〔(【引用サイトリンク】title=Yorkville's Whitewater Recreational Facility )〕 The project was completed in 2010.〔 This project was the first Denil style ladder in the State of Illinois.〔(【引用サイトリンク】title=Fishway being added to Yorkville dam )〕
==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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