464:. Nonacho Lake is the largest lake in the river basin. It discharges to the Taltson River directly via the Nonacho Dam and indirectly via the Tronka Chua Gap, Tronka Chua Lake and Thekulthili Lake to rejoin the river at Lady Grey Lake. From Nonacho Lake to the Twin Gorges Forebay the river flows through a series of lakes, low-gradient reaches, rapids and waterfalls. Often there is just a short section of rapids between the outflow of one lake and the backwaters of the next lake. Taltson Lake, King Lake and Lady Grey Lakes are the larger lakes in this section. Below the outflow of Lady Grey Lake, about 130 km (81 mi) from Nonacho Lake, the river flows 110 km (68 mi) to the Twin Gorges Forebay, passing through several smaller lakes such as Benna Thy Lake but generally with a more standard river course. It is joined in this section by the Tazin River, its largest tributary.
29:
45:
468:
into Tsu Lake. The average flow from 1960 to 1995, measured at a gauge at Tsu Lake Dam, was 183.63 m/s (6,485 cu ft/s). The drainage area above the dam is about 58,700 km (22,700 sq mi). Downstream of Tsu Lake the river runs north for 132 km (82 mi) to Great Slave Lake through
Deskenatlata Lake. It receives the outflows of the Rutledge River and Tethul River in this stretch.
52:
467:
There is a hydroelectric generating plant at the Twin Gorges
Forebay, from where the water flows over Elsie Falls and then for 33 km (21 mi) to Tsu Lake over a series of rapids and through the Nende Chute, a narrow gorge, before entering Tsu Lake. The Konth River drains from the northeast
523:
In 2007 the Dezé Energy
Corporation presented a proposal to expand the Taltson River hydroelectric capacity with a new 36 MW hydroelectric plant at Twin Gorges Forebay to increase total capacity there to 54 MW, and to build a 690 km (430 mi) transmission line to carry power via
476:. It had a school, but that was burned down in 1958, and the trading post closed in 1963. The government put pressure on the residents to move to Fort Resolution. The river enters the southern shore of Great Slave Lake at the western end of the Simpson Island chain.
274:. It contains a complex of interconnected lakes that drain first in a southwest direction and then northward into the Slave River lowland zone. The Tazin River is a major tributary. There are three hydroelectric control structures in the basin, at
256:
which means "scum of water" and is an expression for copper. A 1918 government source says the name means "between high rocks". Other names formerly used include Copper Indian, Rocher, Rock, T'altsan and Yellow Knife.
499:
on the
Taltson River at Twin Gorges Forebay. An 18 MW hydro unit with a 300 kW emergency standby diesel generator provides power via 200 km (120 mi) of transmission lines to Fort Smith,
520:(NTPC) states that the operation is similar to a run-of-river generation facility and has minimal impact on the river's natural flow. High water flows upstream of the dam will cause high flows downstream.
265:
The
Taltson River basin has a subhumid, high boreal ecoclimate. Summer are typically cool and winters are very cold. The basin covers about 60,000 km (23,000 sq mi) in the region between
524:
Taltson Lake and Noncho Lake to the north of Great Slave Lake. The project would also involve construction of a new control structure and rock-cut discharge canal beside the
Nonacho rock-fill dam.
818:
557:
The Tazin River
Catchment upstream of the Tazin Lake outflow has an area of 9,875 km (3,813 sq mi), but as much as 95% is diverted south to the
884:
533:
484:
A dam on Tazin Lake diverts most of the water to the
Charlot River system where it drives hydroelectric facilities that feed the Saskatchewan power grid.
517:
114:
457:
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The
Taltson River rises near a series of lakes, including Coventry Lake and Dymond Lake in the northeast of the basin. It flows north to
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561:. An effective catchment area of 494 km (191 sq mi) feeds the Taltson River.
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472:, on the east bank of the lower Taltson River, was originally a trading post of the
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The river was formerly known as the Copper Indian River in reference to the
516:. Flooding below the dam has been blamed on the power plant. However, the
788:
N.W.T. Power Corp. responsible for flooding below
Taltson dam, MLA says
225:
73:
495:. The Taltson Hydro plant is about 64 km (40 mi) north of
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Tazin River downstream of Tazin Lake outflow, excluding Thoa River
828:, Mackenzie Valley Environmental Impact Review Board, 2007-12-07
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The Taltson dam was built in 1966 to supply power to the
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control structures on the river, and one power station.
769:"Isadore Simon recalls Rocher River before Taltson Dam"
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Local inflows between Twin Gorges and Tsu Lake inflow
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is a roughly 500 km (310 mi) river in the
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756:, NTPC: Northwest Territories Power Corporation
33:Junction of the Tazin and Taltson Rivers, 1931
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252:or Copper Indians. The name is derived from
534:List of rivers of the Northwest Territories
335:Between Nonacho Dam and Twin Gorges Forebay
807:, Prince of Wales Northern Heritage Centre
738:Sessional Papers of the Dominion of Canada
283:
841:Taltson Hydroelectric Expansion Project
644:Taltson Hydroelectric Expansion Project
632:Taltson Hydroelectric Expansion Project
613:Taltson Hydroelectric Expansion Project
568:
550:
518:Northwest Territories Power Corporation
149:60,000 km (23,000 sq mi)
18:
16:River in Northwest Territories, Canada
51:
7:
460:, then west to Gray Lake, an arm of
885:Rivers of the Northwest Territories
860:Taltson River at Outlet of Tsu Lake
656:Taltson River at Outlet of Tsu Lake
349:Tazin (Upstream Tazin Lake Outflow)
14:
321:Between Gray Lake and Nonacho Dam
304:Upstream of Gray Lake, an arm of
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43:
27:
767:Isadore Simon (18 March 2014),
819:"Project Description Overview"
785:Mike Gibbins (28 April 2017),
278:, Tazin Lake and Twin Gorges.
108: • coordinates
1:
92:Physical characteristics
826:Yellowknife Scoping Sessions
719:Project Description Overview
707:Project Description Overview
735:Canada. Parliament (1918),
167: • location
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419:Local Inflows to Tsu Lake
281:Sub-catchment areas are:
177:
153:
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863:, R-ArcticNET, 1960–1995
804:NWT Place Names Database
576:NWT Place Names Database
433:Rutledge River Watershed
206: • right
588:Canada. Parliament 1918
196: • left
443:Tethul River Watershed
130:61.44778°N 112.72778°W
683:Hydro Electric – NTPC
539:Taltson River Airport
228:that drains into the
222:Northwest Territories
86:Northwest Territories
474:Hudson's Bay Company
135:61.44778; -112.72778
847:, Dezé energy, 2009
234:hydroelectric power
200:Thoa, Tazin, Tethul
182:Basin features
126: /
671:Isadore Simon 2014
232:. There are three
695:Mike Gibbins 2017
506:Hay River Reserve
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480:Hydroelectricity
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458:McArthur Lake
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248:known as the
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218:Taltson River
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22:Taltson River
20:
865:, retrieved
859:
849:, retrieved
840:
830:, retrieved
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809:, retrieved
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793:, retrieved
787:
776:, retrieved
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742:, retrieved
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709:, p. 3.
702:
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522:
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470:Rocher River
466:
462:Nonacho Lake
455:
306:Nonacho Lake
280:
276:Nonacho Lake
264:
253:
250:Yellowknives
243:
217:
215:
405:Konth River
187:Tributaries
133: /
121:112°43′40″W
867:2017-08-28
851:2018-06-06
832:2010-03-04
811:2018-06-07
795:2018-06-07
791:, CBC News
778:2018-06-07
760:2018-06-07
744:2018-06-07
545:References
514:Enterprise
497:Fort Smith
493:Pine Point
377:Thoa River
146:Basin size
118:61°26′52″N
502:Hay River
158:Discharge
81:Territory
879:Category
773:CBC News
528:See also
210:Rutledge
65:Location
728:Sources
380:10,941
324:10,922
310:11,486
70:Country
452:Course
408:2,180
383:4,224
369:2,305
366:5,969
341:2,294
338:5,942
327:4,217
313:4,435
254:Tatsan
226:Canada
190:
161:
102:
74:Canada
845:(PDF)
822:(PDF)
261:Basin
98:Mouth
512:and
425:196
422:508
411:840
397:203
394:527
355:191
352:494
270:and
246:Dene
240:Name
216:The
491:at
296:mi
224:of
881::
824:,
771:,
663:^
620:^
595:^
508:,
504:,
440:11
430:10
293:km
697:.
685:.
673:.
658:.
578:.
416:9
402:8
388:7
374:6
360:5
346:4
332:3
318:2
301:1
287:#
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