Optima Lake (original) (raw)

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Optima Lake was built to be a reservoir in Texas County, Oklahoma. The site is just north of Hardesty and east of Guymon in the Oklahoma Panhandle. The earthen Optima Lake Dam (National ID # OK20510) was completed in 1978 by the United States Army Corps of Engineers, with a height of 120 feet (37 m), and a length at its crest of 16,875 feet (5,144 m). Although designed to contain a maximum of 618,500 acre-feet (762,900,000 m3) of water, the lake never reached more than five percent of capacity, and remains effectively empty. Rapid declines in streamflow related to large-scale pumping from the high plains aquifer system, also known as the Ogallala Aquifer, coincided with the completion of the dam, to make the reservoir a dramatic example of unanticipated environmental impacts.

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dbo:abstract Optima Lake was built to be a reservoir in Texas County, Oklahoma. The site is just north of Hardesty and east of Guymon in the Oklahoma Panhandle. The earthen Optima Lake Dam (National ID # OK20510) was completed in 1978 by the United States Army Corps of Engineers, with a height of 120 feet (37 m), and a length at its crest of 16,875 feet (5,144 m). Although designed to contain a maximum of 618,500 acre-feet (762,900,000 m3) of water, the lake never reached more than five percent of capacity, and remains effectively empty. Rapid declines in streamflow related to large-scale pumping from the high plains aquifer system, also known as the Ogallala Aquifer, coincided with the completion of the dam, to make the reservoir a dramatic example of unanticipated environmental impacts. The Corps' website states in part (emphasis in original): "All public use areas around the lake are land access points only, and do not offer swimming, boating, fishing or camping opportunities. The water level in the lake has never reached normal pool. Visitors should be aware that the lake's level is very low, and is often times dry. Visitors wanting to picnic or view wildlife should come for the quiet natural setting -- with or without water in the lake area." The lake surroundings offer few to no amenities since lake camping facilities and buildings were dismantled for public safety by the Corps in 2010. (en) オプティマ湖(Optima Lake)は、アメリカ合衆国オクラホマ州テキサス郡にあるダム湖（貯水池）。オクラホマパンハンドルの町ハーデスティーの北方、ガイモン市の東方に位置する。 アースフィル式のダムであるオプティマダム (NPDP ID：OK20510) は1978年に米国陸軍工兵隊（以下工兵隊）により建設された堤高 120 フィート（およそ37メートル）、堤頂長 16,875 フィート（およそ5,100メートル）で、設計貯水量は最大で 618,500 エーカー・フィート（およそ 763,000 キロ立方メートル）だったが、完成以降これまでにその 5 % を越える貯水量を記録したことがなく、事実上は空（から）の状態にある。建設期間中、オガララ帯水層での大規模な灌漑用水汲み上げにより河川流量が短期間で著しく減少したことが原因であり、予想を超える環境変化がもたらす影響の事例とされている。 工兵隊はそのオプティマ湖案内ウェブサイトに下記の注意書きを掲載している: 「訪問者は、湖の水位が極めて低いということを御承知おきください。雨量や蒸発率にもよりますが、水辺のレクリエーションはお勧めしません。水泳や釣り、ボート遊びなどもできません。湖水地域ですが水の無い静かな自然に親しむのも一考でしょう」 2010年、陸軍工兵隊によりキャンプ場や建屋などは公衆安全のためとして撤去されたので、アメニティー施設はほとんどないか、あるいは全くない。 (ja)
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dbo:nearestCity dbr:Hardesty,_Oklahoma
dbo:thumbnail wiki-commons:Special:FilePath/USACE_Optima_Lake_and_Dam.jpg?width=300
dbo:type dbr:Reservoir
dbo:wikiPageExternalLink http://www.travelok.com/listings/view.profile/id.5580 http://stateimpact.npr.org/oklahoma/2013/03/28/the-lessons-of-history-no-longer-apply-when-it-comes-to-building-lakes/ http://waterdata.usgs.gov/nwis/dv%3Freferred_module=sw&site_no=07232500 https://www.geosociety.org/news/pr/06-39.htm
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dbp:basinCountries United States (en)
dbp:caption Optima Lake and Dam (en)
dbp:cities Hardesty, Oklahoma (en)
dbp:location dbr:Texas_County,_Oklahoma
dbp:name Optima Lake (en)
dbp:pushpinMap Oklahoma#USA (en)
dbp:pushpinMapAlt Location of Optima Lake in Oklahoma, USA. (en)
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rdfs:comment Optima Lake was built to be a reservoir in Texas County, Oklahoma. The site is just north of Hardesty and east of Guymon in the Oklahoma Panhandle. The earthen Optima Lake Dam (National ID # OK20510) was completed in 1978 by the United States Army Corps of Engineers, with a height of 120 feet (37 m), and a length at its crest of 16,875 feet (5,144 m). Although designed to contain a maximum of 618,500 acre-feet (762,900,000 m3) of water, the lake never reached more than five percent of capacity, and remains effectively empty. Rapid declines in streamflow related to large-scale pumping from the high plains aquifer system, also known as the Ogallala Aquifer, coincided with the completion of the dam, to make the reservoir a dramatic example of unanticipated environmental impacts. (en) オプティマ湖(Optima Lake)は、アメリカ合衆国オクラホマ州テキサス郡にあるダム湖（貯水池）。オクラホマパンハンドルの町ハーデスティーの北方、ガイモン市の東方に位置する。 アースフィル式のダムであるオプティマダム (NPDP ID：OK20510) は1978年に米国陸軍工兵隊（以下工兵隊）により建設された堤高 120 フィート（およそ37メートル）、堤頂長 16,875 フィート（およそ5,100メートル）で、設計貯水量は最大で 618,500 エーカー・フィート（およそ 763,000 キロ立方メートル）だったが、完成以降これまでにその 5 % を越える貯水量を記録したことがなく、事実上は空（から）の状態にある。建設期間中、オガララ帯水層での大規模な灌漑用水汲み上げにより河川流量が短期間で著しく減少したことが原因であり、予想を超える環境変化がもたらす影響の事例とされている。 工兵隊はそのオプティマ湖案内ウェブサイトに下記の注意書きを掲載している: 「訪問者は、湖の水位が極めて低いということを御承知おきください。雨量や蒸発率にもよりますが、水辺のレクリエーションはお勧めしません。水泳や釣り、ボート遊びなどもできません。湖水地域ですが水の無い静かな自然に親しむのも一考でしょう」 (ja)
rdfs:label オプティマ湖 (ja) Optima Lake (en)
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