Английская Википедия:Ellsworth Power House and Dam
Шаблон:Use mdy dates Шаблон:Infobox NRHP The Ellsworth Power House and Dam is a hydroelectric power generation facility on the Union River in Ellsworth, Maine.[1] The dam, located just north of downtown Ellsworth, is also known as the Union River Dam,[2] and impounds the river to create Leonard Lake,[3] named for project's engineer, James Leonard.Шаблон:Citation needed The powerhouse is a Renaissance Revival building located at the western end of the dam.Шаблон:Citation needed The power plant, built in 1907,[2] was one of the first peaking power plants built in the state, and the hollow concrete dam is one of the highest hollow (or Ambursen-type) buttress dams ever built, having been described as "the highest power dam in New England" in 1928.[1][4] The facility was nominated for the National Register of Historic Places in 1985,[1] where it is currently listed.[2]
Description
The Ellsworth Dam is located between two bluffs which flank Maine's Union River, and rise to a height of more than Шаблон:Convert.[1] The dam consists of a series of buttresses, each set on a schist bedrock ledge, three feet thick, and spaced about Шаблон:Convert apart, which provide support for two large slabs of steel-reinforced concrete that span the river between the bluffs.[1][4] The dam is Шаблон:Convert in height, with a spillway Шаблон:Convert long.[1] The schist ledge ensures the longevity of the dam.Шаблон:Clarify[4]
The power station is located at the base of the dam on the west bank of the river.[1] It is a Шаблон:Frac-story structure built out of concrete blocks, with a red tile gabled roof.[1] The Renaissance RevivalШаблон:Citation neededШаблон:Clarify structure has round-arch windows which are connected by a stone belt course, and there are Palladian windows in the gable ends.[1] An addition on the building's rear was built with similar styling.[1]
The Ellsworth Dam produces 29,907 megawatt-hours per year as of 2012,[3] and is licensed to supply about 30,000 megawatt-hours per year, which is 1% of Maine's hydropower.[2] It is one of the 118 power-generating dams in Maine as of 2016.[2] The flow of water at the Ellsworth Dam is controlled by the Graham Lake Dam, which created Graham Lake.[3]
History
The power station was built in 1907 by the Bar Harbor and Union River Power Company, to designs by its engineer, James Leonard.[1] The company was merged in 1925 into the Bangor Hydro-Electric Company,[1] now part of Emera.Шаблон:Citation needed Later, the plant was sold to Penobscot HydroШаблон:Clarify, and then to PPL in 1999Шаблон:Clarify.[3] The plant was acquired by Black Bear Hydro in 2009 from PPL,[3] and sold to Brookfield Partners in 2014.Шаблон:Citation needed
The dam was in the process of being relicensed as of 2012; its most recent permit, issued by the Federal Energy Regulatory Commission in 1987, was due to expire in 2017.[3] However, public concern about fish passage and water quality, caused the Federal Energy Regulatory Commission to delay issuing a new permit.Шаблон:Citation needed The new expiration date is April 2020.Шаблон:Citation needed
(The dam is no longer hollow. During the 1990s. the FERC required installation of post-tensioned anchors deep into ledge and the filling of the hollow dam with concrete, in order to increase dam safety.)Шаблон:Citation needed
See also
References
Шаблон:National Register of Historic Places
- Английская Википедия
- Renaissance Revival architecture in Maine
- Buildings and structures in Hancock County, Maine
- Hydroelectric power plants in Maine
- Dams completed in 1907
- Energy infrastructure completed in 1907
- 1907 establishments in Maine
- Buttress dams
- Dams in Maine
- Historic districts on the National Register of Historic Places in Maine
- National Register of Historic Places in Hancock County, Maine
- Dams on the National Register of Historic Places in Maine
- Industrial buildings and structures on the National Register of Historic Places in Maine
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
