874: – around 55 km southwest of Williams Lake and 22 km upstream of the Farwell Canyon Bridge crossing the River. The resulting natural dam was estimated to be roughly 600 to 800 m in length, 300 to 600 m in width and 30 m in depth. As of August 2, a temporary lake was forming behind the dam caused by the slide; it grew up to a length of about 11 km. Communities above the slide dam were warned of the potential for flooding due to rising water, and communities below it were warned of the potential for flooding as a result of overflow or failure of the dam. The overflow began on August 5, and the water breached the dam. The flood, which carried away mud and uprooted trees from an area affected by a 2017 wildfire as well as washed away huts (from Pothole Ranch—only 3 river bends above the Farwell Canyon Bridge) among other things, reached the Fraser River relatively quickly. The risk of fast-moving water and debris, which included mature trees, led to emergency alerts and evacuation orders along both the Chilcotin and Fraser Rivers. NASA reported that by 6 August, the Fraser River water levels had peaked at 3,640 cubic metres per second, which was a sharp increase but not a record breaker. The debris reached the
544:
form the north and turns southeast towards
Hanceville. The valley becomes more deep until it is 1,800 feet below the level of the plateau. At the Fraser-Chilcotin confluence, Chilcotin is 2,220 feet below plateau-level when it is joined by Big Creek Canyon. Between the confluence with its main tributary the Chilko River and its final confluence with the Fraser River, it is approximately 83 km. Through this reach, the Chilcotin River flows through
506:
44:
29:
707:
of this century. The average annual precipitation between 1951 and 1980 was 348mm (13.7 inches). Using the same high emissions scenario, annual average precipitation projections were found to be 4% higher for 2021–2050, 11% for 2051-2080m and 12% higher for the remainder of the century. The data collected does not reflect the entire river, therefore climate can vary across the entire river length.
807:. COSEWIC conducted a rarely-used emergency fast-track assessment of the Chilcotin River steelhead in February 2018, after only 58 individuals returned to their spawning grounds in the previous fall, representing a decline of 81% and an all-time low. Despite this, the recommendation to add them to the Government of Canada's
518:
From its headwaters, Chilcotin River has many branches. Some branches are headed towards the western part of
Chilcotin Plateau. Approximately 80 km (50 mi) from the Coast Range at altitudes of 3,500 to 4,200 feet, water is gathered from small creeks and lakes. The river flows slightly below
745:
covers 40% of the
Chilcotin River watershed. The headwaters of the Chilcotin River are in a montane-spruce zone, and the lowest reach where it confluences with the Fraser River is dominated by bunchgrass. The river also passes through a zone of interior Douglas fir. Over 40% of the watershed area is
706:
considered a high emissions scenario to identify annual average temperature projections. Between 2021 and 2050, temperatures were found to be 7.5 °C (45.5 °F), between 2051 and 2080 temperatures were found to be 9.5 °C (49.1 °F), and 10.9 °C (51.62 °F) for the remainder
543:
meet the
Chilcotin River between Redstone and Alexis Creek. At this point, the Chilcotin River is roughly 200 feet below the surface. The valley in this reach also widens and deepens. At Alexis Creek, the river flows towards a basin as it forms a divide with the Nazko. At this point, the river joins
914:
has already experienced two major MPB outbreaks, first in the mid-1970s–1980s, and the second in the early 2000s ending in 2010. A team of researchers studying post-MPB infested forests in the
Chilcotin Plateau found that although the dominant tree species were not eradicated, MPB outbreaks in the
893:
is complicated and stressors such as climate change and human development can have adverse impacts. Recently, the
Chilcotin River monitoring site has seen increases in metal concentrations. There is not a lot of human development in this area but scientists are investigating the cause or driver of
723:
Rivers, are significant for the
Indigenous people of the Tŝilhqot’in Nation. The annual migration of salmon in these rivers are relied upon by the Tŝilhqot’in to sustain their communities year round; as a food resource, cultural staple, and economic subsidy. To ensure salmon come back after every
724:
fishing season, the Tŝilhqot’in
National Government (TNG) and the Canadian Department of Fisheries and Oceans (DFO) practice sustainable harvesting and monitor the rivers regularly. However, progressively smaller harvesting outcomes in recent years followed by an assessment done by the
835:
In July 2019, the
Chilcotin River and surrounding communities experienced extreme rainfall. Subsequent flooding led to mudslides, inundated roadways and the destruction of culverts. Residents were cut off, leaving over 300 people stranded, and 120 properties destroyed.
559:
The Chilko-Taseko confluence attracts many visitors because the rivers are coloured differently. Taseko River has a milky appearance where as Chilko River has a clear blue appearance. This site is a recreation favourite as it is used for whitewater rafting.
423:, and the Tŝilhqot’in Nation depend on the diversity of Chilcotin River. In recent years, its diverse history, climate, and ecology has been impacted by a number of environmental concerns such as: increases in flooding, changes in water quality, declines in
1767:
572:
in
Chilcotin River between Big Creek and the Fraser River confluence reported a mean discharge of 102 m/s between 1971 and 2018. There have been no active, government-operated hydrometric stations on the river since 2018.
703:
1235:"The Wineglass assemblage, lower Chilcotin River, south-central British Columbia: Late Permian volcanic and plutonic rocks that correlate with the Kutcho assemblage of northern British Columbia"
1840:
604:
Chilcotin River is composed of seven major tributaries, the largest is Chilko River which is unique because it has a volume greater than the Chilcotin River. These tributaries are part of
804:
772:
725:
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1841:"NOTICE: The Tŝilhqot'in National Government has confirmed the continued closure of the Chilcotin River steelhead fishery for 2021 – Tŝilhqot'in National Government"
2167:
1941:
1045:
1986:
1612:
818:
Population declines are a result of factors such as interception by fisheries and competition with hatchery species while out at sea, as well as predation by
411:
The geological processes that created this region support its diverse history, climate, and ecology. This diversity is also illustrated by the presence of
576:
The majority of winter precipitation in the Chilcotin Watershed falls as snow, causing Chilcotin River to experience a pronounced spring and early summer
2087:
808:
580:, which is stream flooding due to melting snow. The highest average monthly discharge is nearly 10 times that of the month with the lowest discharge.
2172:
1865:"Climatic influences on forest fire and mountain pine beetle outbreaks and resulting runoff effects in large watersheds in British Columbia, Canada"
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412:
396:. It is also one of twelve watersheds that make up the Fraser River Basin. Made up of seven major tributaries, Chilcotin River starts northeast of
605:
495:
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1007:
981:
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The annual average temperature between 1951 and 1980 was 5.1 °C (41.18 °F) and between 1981 and 2010 was 6 °C (42.8 °F).
906:(MPB) populations, with the largest infestations occurring in central BC. MPB causes widespread tree mortality that also raise the risk of
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230:
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1911:
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1416:
1319:"Communities of BC's Cariboo Chilcotin Coast. Cities & Towns of the Cariboo Chilcotin and Central Coast of British Columbia"
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401:
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has prompted the TNG to shut down their fishery operations for 2021 and presently, fishing in the Chilcotin River has seized.
842:
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Rocks that form the valley walls suggest that the southward course of the Chilcotin River may have formed during the Late
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420:
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1135:"Dramatic increase in water use efficiency with cumulative forest disturbance at the large forested watershed scale"
532:
380:
and Lake make up the Chilcotin River watershed. This 19,200 km (7,400 sq mi) watershed drains the
1473:
1504:"Characteristics of forest legacies following two mountain pine beetle outbreaks in British Columbia, Canada"
1267:
106:
1318:
822:. Declining habitat quality and interference in spawning pathways by landslides are other contributors.
1445:
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this change, noting that increases in sediments because of changes in streamflow could be an element.
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to the Chilcotin River headwaters every other autumn to spawn, making it one of the longest migrating
1876:
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903:
428:
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499:
468:
1987:"Disaster threat from Chilcotin landslide's river waters decreasing, says B.C. emergency minister"
527:. The Chilcotin River flows southwest through a deepening valley where it is met by the outlet of
415:
and a rich population of fish. Canadian Fisheries and many communities within the region such as:
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69:
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The largest tributary of Chilcotin River is the Chilko River which has a clear blue appearance.
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2137:"BC landslide: 2.5M dump truckloads of debris went into river when Chilcotin blockage broke"
1884:
1864:
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775:. Salmon are an important cultural, food, and economic resource for the Tŝilhqot’in Nation.
689:
553:
460:
353:
349:
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43:
1377:"Hundreds stranded in communities as Chilcotin River flooding washes out roads | CBC News"
1347:
1197:"Regional stratigraphy and age of Chilcotin Group basalts, south-central British Columbia"
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424:
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Nation and other Indigenous communities as a base for paint or dye. The Chilcotin River,
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2011:
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482:. It is unique because its structure and composition correlates to other assemblages (
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and poses a substantial threat to the timber supply industry. Within central BC, the
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203:
1035:"A Guide to Aboriginal Organizations and Services in British Columbia 2011 / 2012"
2036:
760:
528:
198:
2061:
Chilcotin River a 'beast' after landslide breached, says fishing business owner
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future would make forests unusable for the timber industry in the long term.
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1942:"B.C. planning for worst-case scenario if Chilcotin River landslide bursts"
1819:
1520:
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1178:
2012:"Safety prioritized as water begins to overflow Chilcotin River landslide"
368:, meaning "ochre river people," where ochre refers to the mineral used by
1407:
Ministry of Environment and Climate Change Strategy (September 1, 2020).
907:
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was not approved, and the Chilcotin steelhead remain unprotected by the
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472:
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trout in Canada. The Chilcotin River steelhead has been classified as
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where the Clusko comes from the north, flowing southwest and south of
1863:
Vore, Margot E.; Déry, Stephen J.; Hou, Yiping; Wei, Xiaohua (2020).
1744:"Station Reference Index - Water Level and Flow - Environment Canada"
357:
86:
1212:
519:
the upland region of Punkutlaenkut Lake, then westerly towards the
2088:"Chilcotin River landslide could give way, flood areas downstream"
726:
Committee on the Status of Endangered Wildlife in Canada (COSEWIC)
504:
452:
783:
The Chilcotin River hosts a genetically distinct population of
1502:
Alfaro, René I.; Akker, Lara van; Hawkes, Brad (2015-06-04).
400:, flowing southeast until it joins the Fraser River south of
1962:"Province continues to respond to Chilcotin River landslide"
1409:"New web reporting tool illustrates health of B.C.'s rivers"
771:
salmon, the first two of which are considered threatened by
1024:
Search for Station 08MB005 Chilcotin River below Big Creek
715:
The Chilcotin River and its tributaries, most notably the
498:
Periods, and a structural relationship with the overlying
486:) across British Columbia. The assemblages share similar
2018:. Emergency Management and Climate Readiness. 2024-08-05
1968:. Emergency Management and Climate Readiness. 2024-08-01
455:. The lower reach of the Chilcotin River is home to the
1820:"Location – Chilcotin River, BC – Climate Data Canada"
1910:
Canada, Environment and Climate Change (2018-01-08).
839:
On July 31, 2024, a major landslide totally blocked (
360:
is a 241 km (150 mi) long tributary of the
902:
British Columbia experiences recurring outbreaks of
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57:
21:
2086:Lamb-Yorski, Monica; Skrypnek, Jane (2024-08-01).
1794:Report of Progress - Geological Survey of Canada
1107:"Fraser Basin Council - Fraser Basin Watersheds"
61:
970:Benke, Arthur C.; Cushing, Colbert E. (2009).
1299:"Fisheries – Tŝilhqot'in National Government"
494:overlain with sedimentary sequences from the
8:
870:) the river a few kilometres west above the
759:The Chilcotin River supports populations of
1133:Giles-Hansen K, Wei X, Hou Y (March 2021).
1268:"Biogeoclimatic Zones of British Columbia"
588:The Chilcotin River runs along borders of
392:and east to west from Fraser River to the
16:River in southern British Columbia, Canada
1529:
1519:
1168:
1158:
335:1,100 m/s (39,000 cu ft/s)
1472:Canada, Natural Resources (2013-10-25).
1010:. Water Survey of Canada. Archived from
614:
404:, 22 km (14 mi) upstream from
1935:
1933:
1931:
1709:
1707:
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1609:Legislative Library of British Columbia
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737:Biogeoclimatic ecosystem classification
2168:Canyons and gorges of British Columbia
2041:. 2024-08-06. Event occurs at 121.088
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973:Field Guide to Rivers of North America
384:which reaches north to south from the
315:102 m/s (3,600 cu ft/s)
283:19,300 km (7,500 sq mi)
18:
2038:Water breaches dam on Chilcotin River
1791:Canada, Geological Survey of (1877).
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803:and at extreme risk of extinction by
535:by Chilanko River. The confluence of
325:13.8 m/s (490 cu ft/s)
7:
2143:. Global News on YouTube. 2024-08-09
2112:"Landslide Dams the Chilcotin River"
2068:. 2024-08-06. Event occurs at 11:59
1190:
1188:
976:. Academic Press. pp. 314–315.
594:Junction Sheep Range Provincial Park
592:, Big Creek Ecological Reserve, and
1508:Canadian Journal of Forest Research
882:of the Pacific Ocean, on August 9.
1474:"Mountain pine beetle (factsheet)"
1201:Canadian Journal of Earth Sciences
1008:"Archived Hydrometric Data Search"
925:List of rivers of British Columbia
14:
1912:"Species at risk public registry"
878:west of Vancouver, an arm of the
629:10 km below Chilcotin Falls
2092:The Ashcroft-Cache Creek Journal
1715:"Recreation Sites and Trails BC"
1565:from the original on 2016-08-06.
1419:from the original on 2020-08-29.
1251:from the original on 2019-08-29.
809:List of Wildlife Species at Risk
666:15.5 km above Chilko River
427:populations, and an increase in
364:. The name Chilcotin comes from
42:
27:
2173:Tributaries of the Fraser River
1618:from the original on 2021-04-15
1195:Bevier, Mary Lou (2011-02-08).
1051:from the original on 2018-10-19
645:8 km above Chilcotin Lake
471:. The assemblage is made up of
1993:. British Columbia. 2024-08-06
1797:. Geological Survey of Canada.
1772:governmentofbc.maps.arcgis.com
1549:"Mountain Pine Beetle Program"
1413:Government of British Columbia
1242:Government of British Columbia
943:Source elevation derived from
746:covered by pine tree species.
484:Kutcho and Sitlika assemblages
224: • coordinates
146: • coordinates
1:
1139:Carbon Balance and Management
956:Mouth elevation derived from
435:Natural landscape and climate
113:Physical characteristics
637:7 km below Moore Creek
606:the Fraser River tributaries
263: • elevation
189:5,223 ft (1,592 m)
185: • elevation
590:Bull Canyon Provincial Park
301: • location
211: • location
133: • location
48:Chilcotin River watershed (
2204:
2183:Rivers of British Columbia
1450:species-registry.canada.ca
1446:"Species at risk registry"
1160:10.1186/s13021-021-00169-4
610:rivers in British Columbia
331: • maximum
321: • minimum
311: • average
267:1,152 ft (351 m)
1233:Schiarizza, Paul (2013).
478:cut through Late Permian
339:
287:
275:241 km (150 mi)
193:
117:
41:
26:
1768:"ArcGIS Web Application"
1556:Natural Resources Canada
858:51.847000°N 122.788556°W
791:). It migrates from the
2178:Rivers of the Chilcotin
1686:"BC Geographical Names"
1662:"BC Geographical Names"
1638:"BC Geographical Names"
1602:"The Chilcotin Plateau"
1074:"BC Geographical Names"
732:Ecology and environment
621:Location of confluence
539:and its main tributary
62:
2188:Lillooet Land District
2116:NASA Earth Observatory
1869:Hydrological Processes
1521:10.1139/cjfr-2015-0042
863:51.847000; -122.788556
741:Subboreal pine-spruce
510:
246:51.73944°N 122.40083°W
168:52.78583°N 124.76417°W
107:Lillooet Land District
898:Mountain pine beetles
711:Cultural significance
508:
463:which is enclosed by
1748:wateroffice.ec.gc.ca
1348:"Tsilhqot'in Select"
904:mountain pine beetle
634:Punkutlaenkut Creek
457:Wineglass assemblage
429:mountain pine beetle
413:biogeoclimatic zones
352:located in Southern
251:51.73944; -122.40083
173:52.78583; -124.76417
1881:2020HyPr...34.4560V
1719:sitesandtrailsbc.ca
1151:2021CarBM..16....6G
1014:on 24 December 2010
854: /
813:Species at Risk Act
789:Oncorhynchus mykiss
743:biogeoclimatic zone
704:Climate Data Canada
570:hydrometric station
500:Cache Creek Complex
469:Cache Creek terrane
390:Bridge River county
242: /
164: /
1991:The Canadian Press
1940:Potenteau, Doyle.
511:
1889:10.1002/hyp.13908
1875:(24): 4560–4575.
1514:(10): 1387–1396.
1111:fraserbasin.bc.ca
983:978-0-12-378577-0
912:Chilcotin Plateau
876:Strait of Georgia
695:
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600:Major tributaries
531:. This occurs at
496:Triassic-Jurassic
382:Chilcotin Plateau
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690:Big Creek Canyon
676:5 km above
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554:Big Creek Canyon
461:sedimentary rock
354:British Columbia
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653:western end of
618:Tributary name
602:
586:
584:Protected zones
566:
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442:
437:
425:steelhead trout
394:Coast Mountains
386:Nechako Plateau
347:Chilcotin River
330:
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305:below Big Creek
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1042:Practice in BC
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525:Chilcotin Lake
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376:and Lake, and
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849:122°47′18.8″W
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350:/tʃɪlˈkoʊtɪn/
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33:Chilcotin in
30:
25:
20:
2145:. Retrieved
2140:
2131:
2120:. Retrieved
2118:. 2024-08-06
2115:
2106:
2095:. Retrieved
2091:
2081:
2070:. Retrieved
2065:
2060:
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2043:. Retrieved
2037:
2031:
2020:. Retrieved
2015:
2006:
1995:. Retrieved
1990:
1981:
1970:. Retrieved
1965:
1956:
1945:. Retrieved
1919:. Retrieved
1915:
1905:
1872:
1868:
1844:. Retrieved
1834:
1823:. Retrieved
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1786:
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1693:. Retrieved
1689:
1680:
1669:. Retrieved
1665:
1656:
1645:. Retrieved
1641:
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1620:. Retrieved
1608:
1555:
1511:
1507:
1481:. Retrieved
1477:
1453:. Retrieved
1449:
1412:
1384:. Retrieved
1380:
1355:. Retrieved
1352:River Select
1351:
1326:. Retrieved
1322:
1313:
1302:. Retrieved
1275:. Retrieved
1271:
1241:
1204:
1200:
1142:
1138:
1114:. Retrieved
1110:
1081:. Retrieved
1077:
1053:. Retrieved
1041:
1029:
1016:. Retrieved
1012:the original
987:. Retrieved
972:
965:
958:Google Earth
952:
945:Google Earth
939:
901:
889:
846:51°50′49.2″N
838:
834:
817:
788:
782:
758:
750:Biodiversity
740:
714:
701:
672:Chilko River
626:Moore Creek
603:
587:
575:
567:
558:
541:Taseko River
537:Chilko River
529:Puntzi Lakes
517:
492:unconformity
473:Late Permian
443:
417:Alexis Creek
410:
378:Taseko River
374:Chilko River
362:Fraser River
346:
344:
204:Fraser River
2141:Global News
2016:BC Gov News
1966:BC Gov News
1478:nrcan.gc.ca
861: /
826:Disturbance
678:Bull Canyon
546:Bull Canyon
465:older rocks
431:outbreaks.
370:Tŝilhqot’in
366:Tŝilhqot’in
249: /
237:122°24′03″W
171: /
159:124°45′51″W
58:Native name
2162:Categories
2147:2024-08-09
2122:2024-08-08
2097:2024-08-08
2072:2024-08-08
2045:2024-08-08
2022:2024-08-08
1997:2024-08-08
1972:2024-08-08
1947:2024-08-08
1921:2021-04-15
1846:2021-03-25
1825:2021-04-14
1777:2021-04-14
1753:2021-04-14
1724:2021-04-14
1695:2021-04-14
1671:2021-04-14
1647:2021-04-14
1531:1807/69663
1483:2021-04-11
1455:2021-03-26
1386:2021-03-26
1357:2021-03-24
1328:2021-04-14
1304:2021-03-24
1277:2021-03-25
1116:2021-04-14
1083:2021-04-14
931:References
880:Salish Sea
801:endangered
797:anadromous
793:Bering Sea
421:Hanceville
406:Gang Ranch
280:Basin size
234:51°44′22″N
217:Gang Ranch
156:52°47′09″N
126:Itcha Lake
1897:1099-1085
1622:April 15,
1055:April 13,
1018:17 August
820:pinnipeds
685:Big Creek
564:Discharge
488:lithology
467:from the
292:Discharge
70:Chilcotin
1839:jwarne.
1613:Archived
1560:Archived
1558:. 2007.
1417:Archived
1246:Archived
1179:33646414
1145:(1): 6.
1046:Archived
989:5 August
919:See also
908:wildfire
831:Flooding
815:(SARA).
608:and the
533:Redstone
521:Chezakut
450:Pliocene
103:District
93:Province
78:Location
1877:Bibcode
1170:7923323
1147:Bibcode
805:COSEWIC
773:COSEWIC
769:sockeye
765:chinook
698:Climate
578:freshet
446:Miocene
440:Geology
83:Country
63:Cheẑqox
1895:
1177:
1167:
980:
767:, and
755:Salmon
721:Taseko
717:Chilko
552:, and
514:Course
453:epochs
358:Canada
295:
272:Length
122:Source
87:Canada
66:
1616:(PDF)
1605:(PDF)
1563:(PDF)
1552:(PDF)
1249:(PDF)
1238:(PDF)
1049:(PDF)
1038:(PDF)
490:, an
199:Mouth
1893:ISSN
1624:2021
1175:PMID
1057:2020
1020:2013
991:2013
978:ISBN
761:coho
719:and
459:and
345:The
1916:aem
1885:doi
1526:hdl
1516:doi
1381:CBC
1209:doi
1165:PMC
1155:doi
448:or
388:to
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
