The Corra Linn Rapids, named after the Falls of Clyde upper falls of Cora Linn,[2] preceded the dam at this location.[3]
Neighbourhoodedit
The adjacent former train station and neighbourhood were named after the rapids,[4] but the locality has been frequently misspelled as Corra Lynn.[2]
Damedit
For the six-year period after the 1932 opening, the dam was not permitted to raise the level of Kootenay Lake. It operated as a run-of-the-river hydroelectricity plant allowing the spring freshet to pass downstream. After devastating floods to Idaho farmlands in 1938, the International Joint Commission granted two approvals.
The first allowed excavation to the outlet of the lake at Grohman Narrows. In 1939, 255,809 cubic metres (334,585 cu yd) of gravel and 13,706 cubic metres (17,927 cu yd) of rock were removed, which included rock bluffs on the south side of the river.[5] The narrows was made deeper and wider, allowing for a greater drawdown of the lake during the winter and a greater flow during spring freshet. Even after excavation, Grohman Narrows continued to limit outflow. During the 1961 flood, the level of the lake was 3 metres (10 ft) above the maximum level of the dam, owing to water held back at the narrows.[6][7] Models indicate the lake would have been almost 2 metres (7 ft) higher without the excavation. Between 2005 and 2010 BC Hydro considered more excavation at the narrows as a potential "Resource Smart" project.[8]
The second approval permitted the dam to be used to raise the level of Kootenay Lake by 2 metres, thus forming a reservoir for flood control and hydro power.[9][10]
The dam's powerplant has a generating capacity of 51 MW.[1] In 2003, FortisBC bought the dam formerly owned by West Kootenay Power.
Successive damsedit
Map highlighting major dams and reservoirs in the Kootenay River watershed and surrounds
Most outflow is diverted 4.5 kilometres (2.8 mi) past Corra Linn along the Kootenay Canal to the more efficient generating station opened in 1976. Kootenay basin reservoirs provide nearly 7,000,000 acre-feet (8.6 km3) of storage which constitutes almost half of the 15,500,000 acre-feet (19.1 km3) stored in Columbia River Treaty reservoirs.[11]
^The Governments of the United States of America and Canada (17 Jan 1961). . Center for Columbia River History. Archived from the original on 2010-07-06.
corra, linn, concrete, hydroelectric, kootenay, river, between, cities, castlegar, nelson, west, kootenay, region, southern, british, columbia, view, 2014, opening, date1932, operator, fortisbc, spillwaysimpoundskootenay, riverheight16mreservoircreateskootenay. Corra Linn Dam is a concrete hydroelectric dam on the Kootenay River between the cities of Castlegar and Nelson in the West Kootenay region of southern British Columbia Corra Linn DamView of Corra Linn Dam 2014 Opening date1932 1 Operator s FortisBC 1 Dam and spillwaysImpoundsKootenay RiverHeight16mReservoirCreatesKootenay Lake Contents 1 Rapids 2 Neighbourhood 3 Dam 4 Successive dams 5 See also 6 ReferencesRapids editThe Corra Linn Rapids named after the Falls of Clyde upper falls of Cora Linn 2 preceded the dam at this location 3 Neighbourhood editThe adjacent former train station and neighbourhood were named after the rapids 4 but the locality has been frequently misspelled as Corra Lynn 2 Dam editFor the six year period after the 1932 opening the dam was not permitted to raise the level of Kootenay Lake It operated as a run of the river hydroelectricity plant allowing the spring freshet to pass downstream After devastating floods to Idaho farmlands in 1938 the International Joint Commission granted two approvals The first allowed excavation to the outlet of the lake at Grohman Narrows In 1939 255 809 cubic metres 334 585 cu yd of gravel and 13 706 cubic metres 17 927 cu yd of rock were removed which included rock bluffs on the south side of the river 5 The narrows was made deeper and wider allowing for a greater drawdown of the lake during the winter and a greater flow during spring freshet Even after excavation Grohman Narrows continued to limit outflow During the 1961 flood the level of the lake was 3 metres 10 ft above the maximum level of the dam owing to water held back at the narrows 6 7 Models indicate the lake would have been almost 2 metres 7 ft higher without the excavation Between 2005 and 2010 BC Hydro considered more excavation at the narrows as a potential Resource Smart project 8 The second approval permitted the dam to be used to raise the level of Kootenay Lake by 2 metres thus forming a reservoir for flood control and hydro power 9 10 The dam s powerplant has a generating capacity of 51 MW 1 In 2003 FortisBC bought the dam formerly owned by West Kootenay Power Successive dams edit nbsp Map highlighting major dams and reservoirs in the Kootenay River watershed and surrounds After the 1948 Vanport Oregon flood the 1961 Columbia River Treaty led to the construction of the flood control Duncan Dam in 1967 and Libby Dam in 1975 which regulated water flowing into Kootenay Lake Most outflow is diverted 4 5 kilometres 2 8 mi past Corra Linn along the Kootenay Canal to the more efficient generating station opened in 1976 Kootenay basin reservoirs provide nearly 7 000 000 acre feet 8 6 km3 of storage which constitutes almost half of the 15 500 000 acre feet 19 1 km3 stored in Columbia River Treaty reservoirs 11 See also edit nbsp Canada portal nbsp Water portal nbsp Renewable energy portal List of dams in the Columbia River watershed List of generating stations in British ColumbiaReferences edit a b c Electricity facilities and operations www fortisbc com a b Nelson Star 8 Dec 2013 www nelsonstar com 8 December 2013 Corra Linn Dam BC Geographical Names Corra Linn community BC Geographical Names Consolidated Mining and Smelting Annual Report 31 Dec 1939 PDF www library mcgill ca p 21 Archived copy Archived from the original on 2011 09 27 Retrieved 2011 07 10 a href Template Cite web html title Template Cite web cite web a CS1 maint archived copy as title link Brilliant Dam www trailsintime org Correspondence 4 Nov 2005 PDF www bcuc com Corra Linn Dam Archived from the original on 2011 10 04 Kootenay Lake Board of Control Responsibilities Archived from the original on 2011 09 27 The Governments of the United States of America and Canada 17 Jan 1961 Treaty relating to cooperative development of the water resources of the Columbia River Basin with Annexes Center for Columbia River History Archived from the original on 2010 07 06 49 28 N 117 28 W 49 467 N 117 467 W 49 467 117 467 Retrieved from https en wikipedia org w index php title Corra Linn Dam amp oldid 1177514766, wikipedia, wiki, book, books, library,
