St. Clair River#Islands

The river, which some consider a strait,{{cite web |first= Patricia M. |last= Eckel |date= May 4, 2005 |url= http://www.mobot.org/plantscience/resbot/Niag/LakeLevels/isostatic.htm |title= Some Thoughts on Isostatic Rebound as a Hypothetical Factor in Lake and Strait Characteristics in the Great Lakes |work= Niagara Issues |publisher= Missouri Botanical Garden |access-date= April 9, 2015}}{{cite web|url=https://www.geocaching.com/geocache/GC5JX78_st-clair-river |title=GC5JX78 St. Clair River (Earthcache) in Michigan, United States created by alona-spiegel |publisher=Geocaching.com |date= |accessdate=2022-05-05}} flows in a southerly direction, connecting the southern end of Lake Huron to the northern end of Lake St. Clair. It branches into several channels near its mouth at Lake St. Clair, creating a broad delta region known as the St. Clair Flats.{{cite web|author=US Army Corps of Engineers |url=https://www.lre.usace.army.mil/Missions/Great-Lakes-Information/Outflows/Discharge-Measurements/St-Clair-River/ |archive-url=https://web.archive.org/web/20171218143959/http://www.lre.usace.army.mil/Missions/Great-Lakes-Information/Outflows/Discharge-Measurements/St-Clair-River/ |url-status=dead |archive-date=December 18, 2017 |title=Discharge Measurements on the St. Clair River |publisher=Lre.usace.army.mil |date= |accessdate=2022-05-05}} Like a strait, the river serves as a narrow strip of water which connects two larger bodies of water.

The river is {{convert|40.5|mi}} long and drops {{convert|5|ft|0}} in elevation from Lake Huron to Lake St. Clair. The flow rate averages around {{convert|182,000|cuft/s|m3/s}}, and the drainage area is {{convert|223600|sqmi|km2}}.{{cite web|title=Great Lakes Factsheet No. 1|url=http://www.epa.gov/glnpo/atlas/gl-fact1.html|publisher=United States EPA|access-date=30 May 2013}} This takes into account the combined drainage areas of Lakes Huron, Michigan, and Superior.

Generations of indigenous cultures traveled by canoe on the lakes and rivers in this area, carrying on trade across the region and continent.

In the 18th century, French voyageurs and coureurs des bois traveled on the river to trade with the Ojibwa and other regional Native Americans and transport furs in canoes to major posts of French and British traders, including Fort Detroit, built in 1701 downriver from Lake St. Clair on the Detroit River. European demand for American furs, especially beaver, was high until the 1830s.

During the mid-19th century and later, Port Huron and Marine City, Michigan, became major shipbuilding centers, especially the latter. Lumber harvested on The Thumb of Michigan was shipped downriver as log rafts to Detroit for processing and export both domestically and internationally. The wooden ships built along the river carried migrants and immigrants up the river and west through the upper Great Lakes on their way to new homes in the American West. Their farms later shipped out grain to eastern markets as part of the developing area.

Beginning in the late 19th century, iron ore mined in the Mesabi Range, copper and grain were carried east through the lakes by lake freighters, increasingly made of steel in the 20th century, traveled throughout the Great Lakes, transporting commodities such as iron ore from the Mesabi Range, copper, and grain, all products of settlers' labor. Iron was taken to Ashtabula, Ohio and other industrial cities for processing and steel manufacture, and grain was often shipped through to major eastern markets such as Cleveland and New York City.

From the late 19th century, lake steamers carried passengers and traveled among the small towns along the St. Clair and Detroit rivers, and around the Great Lakes. At one time 31 lines operated, but with the rise of automobile use in the 20th century, they gradually declined.

Image:Blue Water Bridge.jpg, showing the twin Blue Water Bridge]]

The St. Clair River and its Lambton County tributaries in Ontario contribute {{convert|103210|acre|ha}} to the watershed. This figure does not include the Sydenham River watershed. In Michigan, the Black, Pine, and Belle rivers drain {{convert|780600|acre|ha}} in Lapeer, Macomb, Sanilac, and St. Clair counties; the watersheds around Bunce Creek and Marine City are relatively small.

{{Redirect|St. Anne Island|the island in Seychelles|Ste. Anne Island}}

• Stag Island lies between Corunna, Ontario and Marysville, Michigan.
• Fawn Island is near Port Lambton, Ontario and Marine City, Michigan.
• Walpole, Seaway, Bassett, Squirrel, Pottowatamie, St. Anne, Dickinson, Russell and Harsens islands are located in the delta where the St. Clair River flows into Lake St. Clair near Algonac, Michigan. These islands are part of the "St. Clair Flats", the only major river delta in the Great Lakes. Six of the islands in this delta are unceded territory that are part of the Walpole Island First Nations, whose members include Ojibwe (Anishinaabe), Potowatomi, and Odawa peoples. They call this delta area Bkejwanong, meaning "where the waters divide".[http://www.bkejwanong.com/about.html "About nin.da.waab.jig"], Walpole Island Heritage Centre, accessed 8 August 2014

Most of the watershed away from the river in Ontario and Michigan is used for agriculture. There were numerous sugar beet farms in the flatlands, and an annual beet market was held in Marine City, Michigan, for years at harvest time. Many of the 19th-century English immigrants to this area came from Lincolnshire, England, where sugar beets were a major commodity crop in the 19th and 20th centuries.

A few forest and wetland areas have survived. Their area has declined significantly since European-American settlement, clearing, and development of cultivated fields for various agricultural crops.

Much of the shoreline on both sides of the St. Clair River is urbanized and extensively industrialized. Intensive development has occurred in and near the adjacent cities of Port Huron, Michigan and Sarnia, Ontario, at the northern end of the river. The most dense concentration of industry, including a large petrochemical complex, lies along the Ontario shore south of Sarnia. Historically Sarnia was founded as a fur trading post.

Several communities along the St. Clair rely on the river as their primary source of drinking water. About one-third to one-half of the residents of Michigan receive their water from the St. Clair/Detroit River waterway.{{Citation needed|date=November 2011}} Industries including petroleum refineries, chemical manufacturers, paper mills, salt producers, and electric power plants also need high-quality water for their operations. Since the late 20th century and passage of environmental laws to protect air and water quality, there have been occasional incidents when some of these industries have illegally contaminated river waters after discharging pollutants. Major clean-up activities were required.

Land areas of the St. Clair River shoreline and flats consist of two biological zones: upland and transitional, both of which are normally above the water table, but which may be flooded periodically.

The upland forests consist of deciduous species, many of which are near their northern climatic limit. Most pre-European settlement trees have been cleared for agriculture, industry, or urbanization. Remaining forest stands, such as oak savannas as well as lakeplain prairies, are found along the southern reaches of the river, particularly on the islands of the St. Clair River Delta and on the Michigan shore in Algonac State Park.

Transitional species are abundant in the low-lying regions, categorized as shrub ecotones, wet meadows, sedge marshes, and island shorelines and beaches. This habitat is home to water and land mammals, including humans, as well as songbirds, waterfowl, insects, pollinators, reptiles, and amphibians.

The aquatic habitat of the St. Clair River ranges from deep and fast near the Blue Water Bridge to shallow and slow in the lower river near its discharge point into Lake St. Clair.

Each area provides a unique habitat for aquatic life:

• macrophytes (visible marine plants),
• benthic macroinvertebrates (organisms that live at the bottom of a lake or stream),
• phytoplankton and zooplankton (floating plants and animals),
• emergent vegetation (plants seen above the water surface),
• fish (from minnows to large sport fish).

Image:Algorail in (St Clair River Mich).jpg

The St. Clair River is a binational Area of Concern (AOC){{cite web|url=https://www.epa.gov/great-lakes-aocs/list-great-lakes-aocs|title=Great Lakes Areas of Concern|last=US EPA|first=REG 05|date=2013-06-17|website=US EPA|language=en|access-date=2019-10-08}} that borders both the United States and Canada. An AOC is an area within the Great Lakes, that has suffered from environmental destruction. The St. Clair River has been considered an AOC because conventional pollutants such as bacteria, heavy metals, toxic organics, contaminated sediment, fish consumption advisories, impacted animal and plant life, and beach closings.{{cite web|url=https://www.epa.gov/great-lakes-aocs/st-clair-river-aoc|title=St. Clair River AOC|last=US EPA|first=REG 05|date=2019-05-29|website=US EPA|language=en|access-date=2019-10-08}}

The United States found that 10 out of 14 of the [https://www.epa.gov/great-lakes-aocs/beneficial-use-impairments-great-lakes-aocs beneficial use impairments] (BUI) were impaired, which would lead to a $21 million investment from the [https://www.glri.us/index.php Great Lakes Restoration Initiative]. After several habitat projects, only two impairments exists: the Restrictions on Fish and Wildlife Consumption and the Restrictions on Drinking Water Consumption or Taste and Odor Problems.

A beneficial use impairment is a change within the physical, biological, and chemical consistency that causes significant environmental degradation.{{cite web|url=https://www.epa.gov/great-lakes-aocs/beneficial-use-impairments-great-lakes-aocs|title=Beneficial Use Impairments for the Great Lakes AOCs|last=US EPA|first=REG 05|date=2015-03-11|website=US EPA|language=en|access-date=2019-10-08}} The St. Clair River has undergone several projects and clean up to remove the BUIs that affected the area. There are currently only 2 BUIs left on the St. Clair River, and once those 2 are removed, the river might go through the delisting process.

• Restrictions on fish and wildlife consumption
• Restrictions on drinking water consumption, or taste and odor
• Tainting of fish and wildlife flavor – REMOVED 2010
• Restriction on dredging activities – REMOVED 2011
• Added costs to agriculture or industry – REMOVED 2012
• Degradation of aesthetics – REMOVED 2012
• Degradation of benthos – REMOVED 2015
• Beach closings – REMOVED 2016
• Bird or animal deformities or reproduction problems – REMOVED 2017
• Loss of fish and wildlife habitat – REMOVED 2017

The St. Clair River AOC includes the entire river, from the Blue Water Bridge at the north end, to the southern tip of Seaway Island, west to St. Johns Marsh and east to include the north shore of Mitchells Bay on Lake St. Clair. Anchor Bay is not included.

Through the Great Lakes Agreement, a Remedial Action Plan (RAP) was created to initiate cleanup measures. Its background report noted the adverse effects of pollution in the river and lakes:

• Restrictions on fish consumption
• Bird and animal deformities
• Degradation of benthos
• Restrictions on dredging activities
• Restrictions on drinking water consumption
• Beach closings
• Degradation of aesthetics
• Added cost to agriculture and industry
• Loss of fish and wildlife habitat

According to the Stage 1 Remedial Action Plan (RAP), the reasons for the Loss of Fish and Wildlife Habitat beneficial use impairment (BUI) in the St. Clair River were general loss of the aquatic plant community due to industrial, agricultural, recreational, and urban developments. A large blob of perchloroethylene was found at the bottom of the St Clair River due to runoff from Dow Chemical Corp in 1985. It remains there, slowly mixing with the water.{{cite web |url=http://www.sustreport.org/lakes/lakes_timeline.htm#seventies |title=14 |website=www.sustreport.org |url-status=dead |archive-url=https://web.archive.org/web/20020918122554/http://www.sustreport.org/lakes/lakes_timeline.htm |archive-date=2002-09-18}}

The RAP for the St. Clair River AOC was initiated in 1985. A bi-national group called the RAP Team, which included representatives from federal, state, and provincial governments of both Canada and the United States was established in 1987 to develop the plan and to ensure adequate and appropriate public involvement.

Federal officials have long acknowledged that dredging and riverbed mining in the St. Clair dropped the long-term average of Great Lakes Huron and Michigan by about 16 inches. A bi-national Great Lakes water-level study concluded in 2013 that unexpected erosion since the last major St. Clair dredging project in the early 1960s has dropped the lakes' long-term average by an additional 3 to 5 inches. Today, these lakes are nearly 2 feet lower than before human modifications to the riverbed of the St. Clair River. This record low has raised concerns about the long-term health of the lakes. Activists urge remediation to slow the flow of waters through the St. Clair River and out of the lake system, to restore former water levels.[http://www.jsonline.com/news/wisconsin/lakes-michigan-huron-hit-record-low-level-dq8loc2-189903561.html Dan Egan, "Lakes Michigan, Huron hit record low water level"], Milwaukee Journal-Sentinel Online, 3 February 2013 However, as of October 2020, the Lake Huron water is averaging 581.5 feet above sea level,{{cite web|url=https://tidesandcurrents.noaa.gov/gldatums.html |title=Great Lakes Low Water Datums - NOAA Tides & Currents |publisher=Tidesandcurrents.noaa.gov |date= |accessdate=2022-05-05}} which is considerably above the Datum of 577.5 feet, and above the Mean Long-Term Water Level of 578.8 feet.{{Cite web| title=Water level - Lake Michigan-Huron | url=https://www.glerl.noaa.gov/data/wlevels/lowlevels/plot/MichHuron.jpg | archive-url=https://web.archive.org/web/20161213192533/https://www.glerl.noaa.gov//data/wlevels/lowlevels/plot/MichHuron.jpg | archive-date=2016-12-13}}

This is a list of bridges and other crossings of the St. Clair River from Lake St. Clair upstream to Lake Huron.

|-

|Harsens Island Ferry

| Cars and passengers

|Algonac, Michigan and Harsens Island, Michigan (crosses the North Channel of the St. Clair)

|{{Coord|42|36|57.4|N|82|33|38.9|W|}}

|-

|Russell Island Ferry

| Passengers only

|Algonac, Michigan and Russell Island, Michigan

|{{Coord|42|37|07.2|N|82|31|47.9|W|}}

|-

|Walpole–Algonac Ferry

| Cars and passengers

|Algonac, Michigan and Walpole Island, Ontario

|{{Coord|42|37|01.6|N|82|31|17.6|W|}}

|-

|Sombra–Marine City (Bluewater) Ferry - Closed 2018

| Cars and passengers

|Marine City, Michigan and Sombra, Ontario

|{{Coord|42|42|46.4|N|82|29|13.3|W|}}

|-

|St. Clair Tunnel

|Canadian National Railway

|rowspan=2|Port Huron, Michigan and Sarnia, Ontario

|{{Coord|42|57|34.2|N|82|25|19.0|W|}}

|-

|Blue Water Bridge

|{{jct|state=MI|I|94|I|69}}
{{jct|province=ON|ON|402}}

|{{Coord|42|59|55.1|N|82|25|23.9|W|}}

|}

• List of rivers of Ontario
• List of rivers of Michigan
• Blue Water River Walk

{{reflist|2}}

==Further reading==

• Scott, I.D. (1921) [https://play.google.com/books/reader?id=D10MAAAAYAAJ&pg=GBS.PR22&hl=en Inland Lakes of Michigan] Michigan Geological Society.

{{Commons category}}

• {{GNIS|1624885|St. Clair River}}

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{{coord|42|31|59|N|82|40|29|W|display=title}}

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Category:Great Lakes Waterway

Category:Border rivers

Category:Canada–United States border

Category:International rivers of North America

Category:Lake Huron

Category:Lake St. Clair

Category:Rivers of Chatham-Kent

Category:Rivers of Lambton County

Category:Rivers of Macomb County, Michigan

Category:Rivers of St. Clair County, Michigan

Category:Michigan State Historic Sites in St. Clair County