Fraser River
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The Fraser River () is the longest river within
British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...
, Canada, rising at Fraser Pass near Blackrock Mountain in the
Rocky Mountains The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in great-circle distance, straight-line distance from the northernmost part of Western Can ...
and flowing for , into the
Strait of Georgia The Strait of Georgia () or the Georgia Strait is an arm of the Salish Sea between Vancouver Island and the extreme southwestern mainland coast of British Columbia, Canada, and the extreme northwestern mainland coast of Washington, United Stat ...
just south of the
City of Vancouver Vancouver is a major city in Western Canada, located in the Lower Mainland region of British Columbia. As the most populous city in the province, the 2021 Canadian census recorded 662,248 people in the city, up from 631,486 in 2016. The Met ...
. The river's annual discharge at its mouth is or , and each year it discharges about 20 million tons of sediment into the ocean.


Naming

The river is named after Simon Fraser, who led an expedition in 1808 on behalf of the
North West Company The North West Company was a Fur trade in Canada, Canadian fur trading business headquartered in Montreal from 1779 to 1821. It competed with increasing success against the Hudson's Bay Company in the regions that later became Western Canada a ...
from the site of present-day Prince George almost to the mouth of the river. The river's name in the Halqemeylem (Upriver Halkomelem) language is , often seen archaically as Staulo, and has been adopted by the Halkomelem-speaking peoples of the Lower Mainland as their collective name, . The river's name in the Dakelh language is . The ''Tsilhqot'in'' name for the river, not dissimilar to the ''Dakelh'' name, is , meaning
Sturgeon Sturgeon (from Old English ultimately from Proto-Indo-European language, Proto-Indo-European *''str̥(Hx)yón''-) is the common name for the 27 species of fish belonging to the family Acipenseridae. The earliest sturgeon fossils date to the ...
''()'' River ''()''.


Course

The Fraser drains a area. Its source is a dripping spring at Fraser Pass in the Canadian Rocky Mountains near the border with
Alberta Alberta is a Provinces and territories of Canada, province in Canada. It is a part of Western Canada and is one of the three Canadian Prairies, prairie provinces. Alberta is bordered by British Columbia to its west, Saskatchewan to its east, t ...
. The river then flows north to the
Yellowhead Highway The Yellowhead Highway () is a major interprovincial highway in Western Canada that runs from Winnipeg west to Graham Island off the coast of British Columbia via Saskatoon and Edmonton. It stretches across the four western provinces of Britis ...
and west past Mount Robson to the
Rocky Mountain Trench The Rocky Mountain Trench, also known as the Valley of a Thousand Peaks or simply the Trench, is a large valley on the western side of the northern part of North America's Rocky Mountains. The Trench is both visually and cartographically a ...
and the Robson Valley near Valemount. After running northwest past 54° north, it makes a sharp turn to the south at Giscome Portage, meeting the
Nechako River The Nechako River (Carrier language, Dakelh: ᘅᐪᙠᗶᑋ) arises on the Nechako Plateau east of the Kitimat Ranges of the Coast Mountains of British Columbia, Canada, and flows north toward Fort Fraser, British Columbia, Fort Fraser, then east ...
at the city of Prince George, then continues south, progressively cutting deeper into the Fraser Plateau to form the
Fraser Canyon The Fraser Canyon is a major landform of the Fraser River where it descends rapidly through narrow rock gorges in the Coast Mountains en route from the Interior Plateau of British Columbia to the Fraser Valley. Colloquially, the term "Fraser Ca ...
from roughly the confluence of the Chilcotin River, near the city of Williams Lake, southwards. It is joined by the
Bridge A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, whi ...
and Seton Rivers at the town of
Lillooet Lillooet () is a district municipality in the Squamish-Lillooet region of southwestern British Columbia. The town is on the west shore of the Fraser River immediately north of the Seton River mouth. On BC Highway 99, the locality is by road abo ...
, then by the
Thompson River The Thompson River is the largest tributary of the Fraser River, flowing through the south-central portion of British Columbia, Canada. The Thompson River has two main branches, the South Thompson River and the North Thompson River. The river ...
at Lytton, where it proceeds south until it is approximately north of the 49th parallel, which is Canada's border with the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
. From Lytton southwards it runs through a progressively deeper canyon between the Lillooet Ranges of the
Coast Mountains The Coast Mountains () are a major mountain range in the Pacific Coast Ranges of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the British Columbia Coast, Coast of British Columbia sout ...
on its west and the
Cascade Range The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington (state), Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as m ...
on its east.
Hell's Gate Hells Gate, Hell's Gate, Hell Gate or Hells Gates may refer to: Places Africa * Hell's Gate National Park, Kenya Antarctica * Hells Gate (Antarctica), Victoria Land * Hells Gate Moraine, Victoria Land Asia * Nyalam Town, Tibet * A location in N ...
, located immediately downstream of the town of Boston Bar, is a famous portion of the canyon where the walls narrow dramatically, forcing the entire volume of the river through a gap only 35 metres (115 feet) wide. An
aerial tramway An aerial tramway, aerial tram, sky tram, cable car or aerial cablecar, aerial cableway, ropeway, téléphérique (French), or Seilbahn (German) is a type of aerial lift which uses one or two stationary cables for support, with a third movin ...
takes visitors out over the river. Hells Gate is visible from Trans-Canada Highway 1 about south of the tramway. Simon Fraser was forced to
portage Portage or portaging ( CA: ; ) is the practice of carrying water craft or cargo over land, either around an obstacle in a river, or between two bodies of water. A path where items are regularly carried between bodies of water is also called a '' ...
the gorge on his trip through the canyon in June 1808. At
Yale Yale University is a private Ivy League research university in New Haven, Connecticut, United States. Founded in 1701, Yale is the third-oldest institution of higher education in the United States, and one of the nine colonial colleges ch ...
, at the head of navigation on the river, the canyon opens up and the river widens, though without much adjoining lowland until
Hope Hope is an optimistic state of mind that is based on an expectation of positive outcomes with respect to events and circumstances in one's own life, or the world at large. As a verb, Merriam-Webster defines ''hope'' as "to expect with confid ...
, where the river then turns west and southwest into the
Fraser Valley The Fraser Valley is a geographical region in southwestern British Columbia, Canada and northwestern Washington State. It starts just west of Hope in a narrow valley encompassing the Fraser River and ends at the Pacific Ocean stretching from th ...
, a lush lowland valley, and runs past
Chilliwack Chilliwack ( ) is a city of about 100,000 people and in the Canadian province of British Columbia. It is located about east of the City of Vancouver in the Fraser Valley. The enumerated population is 93,203 in the city and 113,767 in the gr ...
and the confluence of the Harrison and Sumas Rivers, bending northwest at Abbotsford and Mission. The Fraser then flows past Maple Ridge, Pitt Meadows,
Port Coquitlam Port Coquitlam ( ) is a city in British Columbia, Canada. It is one of 21 municipalities comprising Metro Vancouver. Located east of Vancouver, it is on the north bank of the confluence of the Fraser River and the Pitt River. Coquitlam borders ...
, and north
Surrey Surrey () is a Ceremonial counties of England, ceremonial county in South East England. It is bordered by Greater London to the northeast, Kent to the east, East Sussex, East and West Sussex to the south, and Hampshire and Berkshire to the wes ...
. It turns southwest again just east of
New Westminster New Westminster (colloquially known as New West) is a city in the Lower Mainland region of British Columbia, Canada, and a member municipality of the Metro Vancouver Regional District. It was founded by Major-General Richard Moody as the cap ...
, where it splits into the North Arm, which is the southern boundary of the City of
Vancouver Vancouver is a major city in Western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the cit ...
, and the South Arm, which divides the City of
Richmond Richmond most often refers to: * Richmond, British Columbia, a city in Canada * Richmond, California, a city in the United States * Richmond, London, a town in the London Borough of Richmond upon Thames, England * Richmond, North Yorkshire, a town ...
from the City of Delta to the south. Richmond is on the largest island in the Fraser,
Lulu Island Lulu Island is the name of the largest island in the estuary of the Fraser River, located south of Vancouver, British Columbia, Canada, and the List of Canadian islands by population, second-most populous island in British Columbia, after Vancou ...
and also on Sea Island, which is the location of
Vancouver International Airport Vancouver International Airport is an international airport located on Sea Island (British Columbia), Sea Island in Richmond, British Columbia, Richmond, British Columbia, serving the city of Vancouver and the Lower Mainland region. It is lo ...
, where the Middle Arm branches off to the south from the North Arm. The far eastern end of Lulu Island is named Queensborough and is part of the City of New Westminster. Also in the lowermost Fraser, among other smaller islands, is Annacis Island, an important industrial and port area, which lies to the southeast of the eastern end of Lulu Island. Other notable islands in the lower Fraser are Barnston Island, Matsqui Island, Nicomen Island and Sea Bird Island. Other islands lie on the outer side of the estuary, most notably Westham Island, a wildfowl preserve, and Iona Island, the location of the main sewage plant for the City of Vancouver. The Fraser's
delta Delta commonly refers to: * Delta (letter) (Δ or δ), the fourth letter of the Greek alphabet * D (NATO phonetic alphabet: "Delta"), the fourth letter in the Latin alphabet * River delta, at a river mouth * Delta Air Lines, a major US carrier ...
empties into the
Strait of Georgia The Strait of Georgia () or the Georgia Strait is an arm of the Salish Sea between Vancouver Island and the extreme southwestern mainland coast of British Columbia, Canada, and the extreme northwestern mainland coast of Washington, United Stat ...
between the mainland and
Vancouver Island Vancouver Island is an island in the northeastern Pacific Ocean and part of the Canadian province of British Columbia. The island is in length, in width at its widest point, and in total area, while are of land. The island is the largest ...
; the lands south of the City of
Vancouver Vancouver is a major city in Western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the cit ...
, including the cities of
Richmond Richmond most often refers to: * Richmond, British Columbia, a city in Canada * Richmond, California, a city in the United States * Richmond, London, a town in the London Borough of Richmond upon Thames, England * Richmond, North Yorkshire, a town ...
and
Delta Delta commonly refers to: * Delta (letter) (Δ or δ), the fourth letter of the Greek alphabet * D (NATO phonetic alphabet: "Delta"), the fourth letter in the Latin alphabet * River delta, at a river mouth * Delta Air Lines, a major US carrier ...
, sit on the flat
flood plain A floodplain or flood plain or bottomlands is an area of land adjacent to a river. Floodplains stretch from the banks of a river channel to the base of the enclosing valley, and experience flooding during periods of high Discharge (hydrolog ...
. The islands of the delta include Iona Island, Sea Island, Lulu Island, Annacis Island, and a number of smaller islands. While the vast majority of the river's
drainage basin A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...
lies within British Columbia, a small portion in the drainage basin lies across the international border in Washington in the United States, namely the upper reaches of the tributary
Chilliwack Chilliwack ( ) is a city of about 100,000 people and in the Canadian province of British Columbia. It is located about east of the City of Vancouver in the Fraser Valley. The enumerated population is 93,203 in the city and 113,767 in the gr ...
and Sumas rivers. Most of lowland
Whatcom County, Washington Whatcom County (, ) is a County (United States), county located in the northwestern corner of the U.S. state of Washington (state), Washington, bordered by the Lower Mainland (the Metro Vancouver and Fraser Valley Regional Districts) of the ...
is part of the
Fraser Lowland The Fraser Lowland is a landform and physiographic region in the Pacific Northwest of North America, shared between the Canadian province of British Columbia and the U.S. state of Washington. The region includes much of the Lower Mainland regio ...
and was formed also by sediment deposited from the Fraser, though most of the county is not in the Fraser drainage basin. Similar to the
Columbia River Gorge The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to deep, the canyon stretches for over as the river winds westward through the Cascade Range, forming the boundary between the state ...
east of
Portland, Oregon Portland ( ) is the List of cities in Oregon, most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette River, Willamette and Columbia River, ...
, the Fraser exploits a topographic cleft between two mountain ranges separating a more continental climate (in this case, that of the
British Columbia Interior The British Columbia Interior, popularly referred to as the BC Interior or simply the Interior, is a geographic region of the Canadian province of British Columbia. While the exact boundaries are variously defined, the British Columbia Interior ...
) from a milder climate near the coast. When an Arctic
high-pressure area A high-pressure area, high, or anticyclone, is an area near the surface of a planet where the atmospheric pressure is greater than the pressure in the surrounding regions. Highs are middle-scale meteorological features that result from interpl ...
moves into the
British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...
Interior and a relatively
low-pressure area In meteorology, a low-pressure area (LPA), low area or low is a region where the atmospheric pressure is lower than that of surrounding locations. It is the opposite of a high-pressure area. Low-pressure areas are commonly associated with incle ...
builds over the general
Puget Sound Puget Sound ( ; ) is a complex estuary, estuarine system of interconnected Marine habitat, marine waterways and basins located on the northwest coast of the U.S. state of Washington (state), Washington. As a part of the Salish Sea, the sound ...
and Strait of Georgia region, the cold Arctic air accelerates southwest through the
Fraser Canyon The Fraser Canyon is a major landform of the Fraser River where it descends rapidly through narrow rock gorges in the Coast Mountains en route from the Interior Plateau of British Columbia to the Fraser Valley. Colloquially, the term "Fraser Ca ...
. These outflow winds can gust up to and have at times exceeded . Such winds frequently reach Bellingham and the
San Juan Islands The San Juan Islands is an archipelago in the Pacific Northwest of the United States between the U.S. state of Washington and Vancouver Island, British Columbia, Canada. The San Juan Islands are part of Washington state, and form the core of ...
, gaining strength over the open water of the
Strait of Juan de Fuca The Strait of Juan de Fuca (officially named Juan de Fuca Strait in Canada) is a body of water about long that is the Salish Sea's main outlet to the Pacific Ocean. The Canada–United States border, international boundary between Canada and the ...
. The estuary at the river's mouth is a site of hemispheric importance in the
Western Hemisphere Shorebird Reserve Network The Western Hemisphere Shorebird Reserve Network (WHSRN) is a conservation movement, conservation strategy targeting shorebirds in the Americas launched in 1985. Its aim is to protect the nesting, reproduction, breeding and Staging area (birds), st ...
.


Discharge

The Water Survey of Canada currently operates 17
gauge Gauge ( ) may refer to: Measurement * Gauge (instrument), any of a variety of measuring instruments * Gauge (firearms) * Wire gauge, a measure of the size of a wire ** American wire gauge, a common measure of nonferrous wire diameter, especia ...
stations that measure discharge and water level along the majority of the mainstem from Red Pass just downstream of Moose Lake in the
Mount Robson Provincial Park Mount Robson Provincial Park is a provincial park in the Canadian Rockies with an area of 2,249 km. The park is located entirely within British Columbia, bordering Jasper National Park in Alberta. The B.C. legislature created the park in 191 ...
, to Steveston in Vancouver at the river mouth.Real-Time Hydrometric Data Map Search – Water Level and Flow – Environment Canada
/ref> With an average flow at the mouth of about , the Fraser is the largest river by discharge flowing into the Pacific seaboard of Canada and the fifth largest in the country. The average flow is highly seasonal; summer discharge rates can be ten times larger than the flow during the winter. The Fraser's highest recorded flow, in June 1894, is estimated to have been at
Hope Hope is an optimistic state of mind that is based on an expectation of positive outcomes with respect to events and circumstances in one's own life, or the world at large. As a verb, Merriam-Webster defines ''hope'' as "to expect with confid ...
. It was calculated using high-water marks near the hydrometric station at Hope and various statistical methods. In 1948 the Fraser River Board adopted the estimate for the 1894 flood. It remains the value specified by regulatory agencies for all flood control work on the river. Further studies and hydraulic models have estimated the maximum discharge of the Fraser River, at Hope during the 1894 flood, as within a range of about .


History

The Maris Pacifici map published in 1589 features on the west coast of North-America the first ever representation of two major coastline features: the delta of the Fraser River labeled "Baia de las isleas" and the mouth of the
Columbia River The Columbia River (Upper Chinook language, Upper Chinook: ' or '; Sahaptin language, Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river headwater ...
identified as "Rio Grande". These rivers would therefore have been sighted by visitors long before official records would confirm. In spite of limited evidence of  Francis Drake expedition whereabouts in the
Pacific Northwest The Pacific Northwest (PNW; ) is a geographic region in Western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Though no official boundary exists, the most common ...
, BC history commentator Sam Bawlf posited that the Ortelius map was a proof that Drake sighted the mouth of the Fraser and came through the
Strait of Juan de Fuca The Strait of Juan de Fuca (officially named Juan de Fuca Strait in Canada) is a body of water about long that is the Salish Sea's main outlet to the Pacific Ocean. The Canada–United States border, international boundary between Canada and the ...
..  On June 14, 1792, the Spanish explorers
Dionisio Alcalá Galiano Dionisio Alcalá Galiano (8 October 1760 – 21 October 1805) was a Spanish Navy officer, cartographer, and explorer. He mapped various coastlines in Europe and the Americas with unprecedented accuracy using new technology such as chronomete ...
and Cayetano Valdés entered and anchored in the North Arm of the Fraser River, becoming the first Europeans to officially find and enter it. The existence of the river, but not its location, had been deduced during the 1791 voyage of José María Narváez, under Francisco de Eliza. The upper reaches of the Fraser River were first explored by
Sir Alexander Mackenzie Sir Alexander Mackenzie ( – 12 March 1820) was a Scottish explorer and fur trader known for accomplishing the first crossing of North America north of Mexico by a European in 1793. The Mackenzie River and Mount Sir Alexander are named afte ...
in 1793, and fully traced by Simon Fraser in 1808, who confirmed that it was not connected with the
Columbia River The Columbia River (Upper Chinook language, Upper Chinook: ' or '; Sahaptin language, Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river headwater ...
. The lower Fraser was revisited in 1824 when the
Hudson's Bay Company The Hudson's Bay Company (HBC), originally the Governor and Company of Adventurers of England Trading Into Hudson’s Bay, is a Canadian holding company of department stores, and the oldest corporation in North America. It was the owner of the ...
sent a crew across Puget Sound from its Fort George southern post on the
Columbia River The Columbia River (Upper Chinook language, Upper Chinook: ' or '; Sahaptin language, Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river headwater ...
. The expedition was led by James McMillan. The Fraser was reached via the Nicomekl River and the Salmon River reachable after a portage. Friendly tribes met earlier on by the Simon Fraser crew were reacquainted with. A trading post with agricultural potential was to be located. By 1827, a crew was sent back via the mouth of the Fraser to build and operate the original Fort Langley. McMillan also led the undertaking. The trading post original location would soon become the first ever mixed ancestry and agricultural settlement in southern
British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...
on the Fraser (Sto:lo) river. In 1828 George Simpson visited the river, mainly to examine Fort Langley and determine whether it would be suitable as the
Hudson's Bay Company The Hudson's Bay Company (HBC), originally the Governor and Company of Adventurers of England Trading Into Hudson’s Bay, is a Canadian holding company of department stores, and the oldest corporation in North America. It was the owner of the ...
's main Pacific depot. Simpson had believed the Fraser River might be navigable throughout its length, even though Simon Fraser had described it as non-navigable. Simpson journeyed down the river and through the
Fraser Canyon The Fraser Canyon is a major landform of the Fraser River where it descends rapidly through narrow rock gorges in the Coast Mountains en route from the Interior Plateau of British Columbia to the Fraser Valley. Colloquially, the term "Fraser Ca ...
and afterwards wrote "I should consider the passage down, to be certain Death, in nine attempts out of Ten. I shall therefore no longer talk about it as a navigable stream". His trip down the river convinced him that Fort Langley could not replace
Fort Vancouver Fort Vancouver was a 19th-century fur trading post built in the winter of 1824–1825. It was the headquarters of the Hudson's Bay Company's Columbia Department, located in the Pacific Northwest. Named for Captain George Vancouver, the fort was ...
as the company's main depot on the Pacific coast. Much of British Columbia's history has been bound to the Fraser, partly because it was the essential route between the Interior and the Lower Coast after the loss of the lands south of the 49th Parallel with the
Oregon Treaty The Oregon Treaty was a treaty between the United Kingdom and the United States that was signed on June 15, 1846, in Washington, D.C. The treaty brought an end to the Oregon boundary dispute by settling competing American and British claims to ...
of 1846. It was the site of its first recorded settlements of Aboriginal people (''see''
Musqueam The Musqueam Nation ( Hunquminum: ) is a First Nation whose traditional territory encompasses the western half of what is now Greater Vancouver, in British Columbia, Canada. It is governed by a band council and is known officially as the Musq ...
, , St'at'imc, Secwepemc and Nlaka'pamŭ), the site of the first European-Indigenous mixed ancestry settlement in southern British-Columbia (''see'' Fort Langley), the route of multitudes of prospectors during the Fraser Canyon Gold Rush and the main vehicle of the province's early commerce and industry. In 1998, the river was designated as a Canadian Heritage River for its natural and human heritage. It remains the longest river with that designation.


Uses

The Fraser is heavily exploited by human activities, especially in its lower reaches. Its banks are rich farmland, its water is used by
pulp mill A pulp mill is a manufacturing facility that converts wood chips or other plant fiber sources into a thick fiber board which can be shipped to a paper mill for further processing. Pulp can be manufactured using mechanical, semi-chemical, or ...
s, and a few dams on some tributaries provide
hydroelectric power Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energ ...
. The main flow of the Fraser has never been dammed partly because its high level of sediment flows would result in a short dam lifespan, but mostly because of strong opposition from fisheries and other environmental concerns. In 1858, the Fraser River and surrounding areas were occupied when the gold rush came to the Fraser Canyon and the Fraser River. It is also a popular fishing location for residents of the Lower Mainland. The delta of the river, especially in the Boundary Bay area, is an important stopover location for migrating shorebirds. The Fraser Herald, a regional position within the
Canadian Heraldic Authority The Canadian Heraldic Authority (CHA; ) is part of the Canadian honours system under the Monarchy of Canada, Canadian monarch, whose authority is exercised by the Governor General of Canada. The authority is responsible for the creation and gran ...
, is named after the river.


Fishing

The Fraser River is known for the fishing of white sturgeon, all five species of Pacific salmon ( chinook,
coho COHO, short for Coherent Oscillator, is a technique used with radar systems based on the cavity magnetron to allow them to implement a moving target indicator display. Because the signals are only coherent when received, not transmitted, the concept ...
, chum,
pink Pink is a pale tint of red, the color of the Dianthus plumarius, pink flower. It was first used as a color name in the late 17th century. According to surveys in Europe and the United States, pink is the color most often associated with charm, p ...
, sockeye), as well as steelhead trout. The Fraser River is also the largest producer of salmon in Canada. A typical white sturgeon catch can average about . A white sturgeon weighing an estimated and measuring was caught and released on the Fraser River in July 2012. In 2021, a white sturgeon was caught on the river weighing , with a length of . It was estimated to be over 100 years old. The fish was tagged and released.


Flooding

The most significant Fraser river floods in recorded history occurred in 1894 and 1948.


1894 flood

After European settlement, the first disastrous flood in the
Lower Mainland The Lower Mainland is a geographic and cultural region of the mainland coast of British Columbia that generally comprises the regional districts of Metro Vancouver and the Fraser Valley. Home to approximately 3.05million people as of the 2021 ...
(
Fraser Valley The Fraser Valley is a geographical region in southwestern British Columbia, Canada and northwestern Washington State. It starts just west of Hope in a narrow valley encompassing the Fraser River and ends at the Pacific Ocean stretching from th ...
and
Metro Vancouver The Metro Vancouver Regional District (MVRD), or simply Metro Vancouver, is a Canadian political subdivision and Corporation, corporate entity representing the metropolitan area of Greater Vancouver, designated by provincial legislation as o ...
) occurred in 1894. With no protection against the rising waters of the Fraser River, Fraser Valley and Metro Vancouver communities from Chilliwack downstream were inundated with water. In the 1894 floods, the water mark at Mission reached . After the 1894 flood, a dyking system was constructed throughout the Fraser Valley. The dyking and drainage projects greatly improved the flood problems, but over time, the dykes were allowed to fall into disrepair and became overgrown with brush and trees. With some dykes constructed of a wooden frame, they gave way in 1948 in several locations, marking the second disastrous flood. Flooding since 1948 has been minor in comparison.


1948 flood

1948 saw massive flooding in Chilliwack and other areas along the Fraser River. The high-water mark at Mission rose to . The peak flow was about 15,600 cubic meters per second.


Timeline

*On May 28, 1948, the Semiault Creek Dyke broke. *On May 29, 1948, dykes near Glendale (now Cottonwood Corners) gave way and in four days, of fertile ground were under water. *On June 1, 1948, the Cannor Dyke (east of Vedder Canal near Trans Canada Highway) broke and released tons of Fraser River water onto the Greendale area, destroying homes and fields. *On June 3, 1948, the steamer '' Gladys'' supplied flood-stricken Chilliwack with tents and provisions as well as moving people and stock onto high ground.


Causes

Cool temperatures in March, April, and early May had delayed the melting of the heavy snowpack that had accumulated over the winter season. Several days of hot weather and warm rains over the holiday weekend in late May hastened the thawing of the snowpack. Rivers and streams quickly swelled with spring runoff, reaching heights surpassed only in 1894. Finally, the poorly maintained dyke systems failed to contain the water. At the height of the 1948 flood, stood under water. Dykes broke at Agassiz, Chiliwack, Nicomen Island, Glen Valley and Matsqui. When the flood waters receded a month later, 16,000 people had been evacuated, with damages totaling $20 million, about $225 million in 2020 dollars.


1972 flood

Major flooding occurred once again in 1972 due to a significant spring freshet, primarily impacting regions around Prince George,
Kamloops Kamloops ( ) is a city in south-central British Columbia, Canada, at the confluence of the North Thompson River, North and South Thompson Rivers, which join to become the Thompson River in Kamloops, and east of Kamloops Lake. The city is the ad ...
,
Hope Hope is an optimistic state of mind that is based on an expectation of positive outcomes with respect to events and circumstances in one's own life, or the world at large. As a verb, Merriam-Webster defines ''hope'' as "to expect with confid ...
and
Surrey Surrey () is a Ceremonial counties of England, ceremonial county in South East England. It is bordered by Greater London to the northeast, Kent to the east, East Sussex, East and West Sussex to the south, and Hampshire and Berkshire to the wes ...
.


2007 flood

Due to record snowpacks on the mountains in the Fraser River catch basin which began melting, combined with heavy rainfall, water levels on the Fraser River rose in 2007 to a level not reached since 1972. Low-lying land in areas upriver such as Prince George suffered minor flooding. Evacuation alerts were given for the low-lying areas not protected by dikes in the
Lower Mainland The Lower Mainland is a geographic and cultural region of the mainland coast of British Columbia that generally comprises the regional districts of Metro Vancouver and the Fraser Valley. Home to approximately 3.05million people as of the 2021 ...
.Fraser flood alert imminent Mission gauge under close scrutiny, river likely to peak at 7.5 m by Saturday
. ''Langley Times'', June 6, 2007.
However, the water levels did not breach the dikes, and major flooding was averted.


2021 flood

Major flooding occurred in November 2021 as part of the November 2021 Pacific Northwest floods.


Tributaries

Tributaries are listed from the mouth of the Fraser and going up river.


See also

* List of crossings of the Fraser River * List of crossings of the Thompson River * List of crossings of the Nechako River * List of longest rivers of Canada * French Bar Canyon *
Fraser Canyon The Fraser Canyon is a major landform of the Fraser River where it descends rapidly through narrow rock gorges in the Coast Mountains en route from the Interior Plateau of British Columbia to the Fraser Valley. Colloquially, the term "Fraser Ca ...
*
List of rivers of British Columbia The following is a partial list of rivers of British Columbia, organized by drainage basin, watershed. Some large creeks are included either because of size or historical importance (See Alphabetical List of British Columbia rivers ). Also includ ...
* Moran Dam (proposal) * Vanport Oregon flood May 30, 1948


References


Further reading

*
''The Fraser''
Bruce Hutchison, 1950, classic work by noted BC editor and publisher


External links


Map and photographs
{{Authority control Rivers of British Columbia Rivers of the Pacific Ranges Rivers of the Canadian Rockies Canadian Heritage Rivers Canadian Cascades Interior of British Columbia Landforms of Vancouver South Coast of British Columbia Drainage basins of the Pacific Ocean Ramsar sites in Canada Braided rivers