| 翻訳と辞書 |
Gibson Dam
Gibson Dam is a concrete arch dam on the Sun River, a tributary of the Missouri River, about west of Great Falls, Montana in the United States. Located on the eastern edge of the Rocky Mountains, the dam was built by the U.S. Bureau of Reclamation (USBR) between 1926 and 1929 as part of the Sun River Project to develop about of irrigated land in the Sun River Valley.
==Specifications==
The dam is a high and long arch gravity structure, with a base thickness of tapering to at the crest. As a whole the dam contains about of concrete.〔 The impounded water forms Gibson Reservoir, which can store up to at full water levels of . When full, the reservoir covers , with a shoreline of roughly and a maximum depth of .〔 Water releases are controlled by two sets of outlets: three release valves at the base of the dam have a combined capacity of , while a gated tunnel spillway, controlled by six 34x12 ft (10x4 m) radial gates, can pass a maximum of .〔
Gibson Dam's main function is to capture spring snowmelt and release it during summer for the irrigation for about of land on the north side of the Sun River and south of the river. Water released from Gibson travels downstream for about before it is intercepted by the Sun River Diversion Dam, which diverts water into the Pishkun Supply Canal, which sends water to the offstream Pishkun Reservoir. The Sun River Slope Canal System takes water from Pishkin Reservoir to serve the irrigated lands on the north side of the river. The headworks for the Fort Shaw Canal, which serves the lands south of the river, are located further downstream and take water directly from the river. The lands north of the river comprise the Greenfields Irrigation District, while the south side is run by the Fort Shaw Irrigation District.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Gibson Dam」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|