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lake koocanusa wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 selenium contamination 2 fish 3 see also 4 references 5 external links toggle the table of contents lake koocanusa 3 languages cebuano deutsch português edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide coordinates 48 55 n 115 11 w 48 92 n 115 18 w 48 92 115 18 from wikipedia the free encyclopedia reservoir in montana british columbia lake koocanusa lake koocanusa location within montana show map of montana lake koocanusa location within the united states show map of the united states location montana british columbia coordinates 48 55 n 115 11 w 48 92 n 115 18 w 48 92 115 18 lake type reservoir primary inflows kootenay river canada primary outflows kootenai river usa basin countries united states canada surface elevation 2 459 feet 750 m lake koocanusa ˌ k uː k ə ˈ nj uː s ə koo kuh nyoo suh is a reservoir in british columbia canada and montana united states formed by the damming of the kootenai river by the libby dam in 1972 the dam was formally dedicated by us president gerald ford on august 24 1975 1 the koocanusa bridge over the lake from the east bank the lake is formed north of the dam reaching 48 miles 77 km to the canada united states border and 42 miles 68 km further into british columbia the lake holds 13 of the water in the columbia river system the town of rexford was moved as well as the great northern railway line the town of waldo british columbia is now covered by the lake what was once a barrier to river travel jennings canyon is now inundated by the lake 2 the elk river joins the kootenay river in the northern part of lake koocanusa within canadian territory lake koocanusa was named in a contest won by alice beers of rexford montana 1 the name is a portmanteau of kootenai river canada and usa lake koocanusa was built as a joint project of the u s and canada it is 26 km 16 mi from libby montana also on the kootenai river from which the dam gets its name libby dam has a visitors center and can be accessed by the lake koocanusa scenic byway which begins in the nearby town of libby montana the pacific northwest national scenic trail follows highway 37 along the east side of the lake before crossing over the lake koocanusa bridge and climbing up webb mountain selenium contamination edit according to a march 8 2021 article in the narwhal concerns had been raised about selenium pollution leaching from teck resources elk valley open pit coal mines waste rock which is upstream from the lake system 3 a september 2020 montana department of environmental quality presentation to the board of environmental review meeting reported that the 95 of the selenium coming into lake koocanusa originated from the elk river which has been contaminated by current and historic coal mining in the elk valley the average selenium levels in lake koocanusa were 1 part per billion montana established new standards for selenium 0 8 parts per billion 3 4 because of the high bioaccumulation of selenium in fish excessive levels of selenium in an aquatic ecosystem has implications for human health 5 6 in the spring of 2020 teck resources had reported a dramatic decline in adult westslope cutthroat trout in elk valley waterways closest to its mines 3 since 2015 british columbia and montana have agreed to adopt aligned standards for selenium levels by 2020 7 montana s has been in force since the fall of 2020 but british columbia has not aligned their standards yet 7 fish edit the lake supports a wide variety of fish species below is a table detailing the various fish species which may be encountered on the lake 8 species family native to montana brook trout trout introduced bull trout trout native burbot codfish native kokanee trout introduced largemouth bass sunfish introduced largescale sucker sucker native longnose dace minnow native longnose sucker sucker native mountain whitefish trout native northern pike pike introduced northern pikeminnow minnow native mylocheilus caurinus minnow native pumpkinseed sunfish introduced rainbow trout trout introduced redside shiner minnow native westslope cutthroat trout trout native yellow perch perch introduced see also edit list of lakes of british columbia references edit 1 2 remarks at dedication ceremonies for the libby dam libby montana the american presidency project libby dam the dams balance of power archived from the original on june 29 2011 retrieved july 12 2011 1 2 3 cruickshank ainslie march 8 2021 b c under pressure as u s epa releases selenium pollution standard for water near elk valley coal mines the narwhal retrieved march 8 2021 kelly myla sullivan lauren september 24 2020 establishing selenium standards for lake koocanusa and kootenai river that protect aquatic life pdf montana department of environmental quality board of environmental review meeting report water quality standards modeling section retrieved march 8 2021 hamilton steven j june 29 2004 review of selenium toxicity in the aquatic food chain science of the total environment 326 1 1 31 bibcode 2004scten 326 1h doi 10 1016 j scitotenv 2004 01 019 issn 0048 9697 pmid 15142762 gribble matthew karimi roxanne feingold beth nyland jennifer o hara todd gladyshev michail chen celia october 8 2015 mercury selenium and fish oils in marine food webs and implications for human health journal of the marine biological association of the united kingdom 1 96 43 59 doi 10 1017 s0025315415001356 pmc 4720108 pmid 26834292 via cambridge dead link 1 2 cruickshank ainslie october 8 2020 b c stalling on new rules for selenium pollution from coal mines environmental groups say the narwhal retrieved march 8 2021 fishmt waterbody details myfwp mt gov retrieved june 17 2022 external links edit the libby montana web site with more information about lake koocanusa libby dam united states army corps of engineers v t e hydrography of british columbia rivers columbia cowichan fraser kootenay liard nanaimo nass nechako peace quesnel skeena stikine thompson more lakes atlin babine cowichan great central harrison kinbasket kootenay nechako okanagan shuswap tagish teslin williston more coastal features haida gwaii cumshewa inlet darwin sound laskeek bay masset inlet rennell sound skidegate channel skidegate inlet north coast arthur passage burke channel chatham sound dixon entrance douglas channel finlayson channel fisher channel fitz hugh sound gardner canal grenville channel hecate strait juan perez sound lama passage laredo channel milbanke sound observatory inlet portland inlet prince rupert harbour princess royal channel principe channel queen charlotte sound rivers inlet seaforth channel wright sound central coast belize inlet bute inlet call inlet cordero channel drury inlet frederick arm goletas channel johnstone strait kingcome inlet knight inlet loughborough inlet nodales channel phillips arm pryce channel queen charlotte strait seymour inlet smith inlet smith sound sutlej channel wells passage salish sea active pass baynes sound boundary bay boundary pass burrard inlet calm channel captain passage desolation sound discovery passage haro strait homfray channel hoskyn channel howe sound jervis inlet malaspina strait okisollo channel port san juan ramsay arm saanich inlet sansum narrows satellite channel sechelt inlet stuart channel strait of georgia strait of juan de fuca sutil channel toba inlet trincomali channel victoria harbour vancouver island barkley sound brooks bay checleset bay clayoquot sound hansen bay kyuquot sound nootka sound pachena bay quatsino sound san josef bay canada portal rivers portal lakes portal retrieved from https en wikipedia org w index php title lake_koocanusa oldid 1366228012 categories bodies of water of lincoln county montana regional district of east kootenay reservoirs in british columbia reservoirs in montana lakes of british columbia east kootenay canada united states border international lakes of north america kootenai national forest protected areas of lincoln county montana lakes of the rocky mountains kootenay river water pollution in the united states hidden categories use mdy dates from february 2025 pages using gadget wikiminiatlas articles with short description short description is different from wikidata pages using infobox body of water with auto short description coordinates on wikidata articles using infobox body of water without alt articles using infobox body of water without image bathymetry all articles with dead external links articles with dead external links from november 2020 this page was last edited on 26 july 2026 at 23 20 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents lake koocanusa 3 languages add topic
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