Cooper River

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Cooper River
US Route 80 over Trinity River.jpg
Old WM-125 bridge near Richfield
Location
CountryIbica
Physical characteristics
Source 
 - locationWest Monroe, near Valley Mills
Mouth 
 • location
Gulf of Monroe, in Freemont County, West Monroe
 • elevation
0 ft (0 m)
Length418 miles (673 km)
Basin size15,589 sq mi (40,380 km2)
Discharge 
 - average6,368 cu ft/s (180.3 m3/s)

The Cooper River is a 418-mile (673 km) river, the longest with a watershed entirely within the state of West Monroe. It rises in extreme northern West Monroe, a few miles south of the Petra state line, near Valley Mills.

Course

Stanford Atwater Bridge (tall structure in background) carrying Interstate 25 across the Cooper River in Katy

The Cooper flows south from Katy across a fertile floodplain and the pine forests of Northern West Monroe. The Cooper meets the Knox and Louis Bayous to form Lake Mynatt, which was formed by a dam in 1935, between Leesville and Louisville.

From Lake Mynatt, the Cooper takes a more southwestern course though Lee and Washington counties, before flowing through downtown Shelby, the river featuring a riverwalk in town. From Shelby to the mouth of the river, the Cooper is largely channelized as it enterers the suburbs of Willmington. In Freemont County, after flowing past Willmington Carter International Airport, the river largely forms the city limits between Bishop on the south bank, and Ferris and Willmington on the north bank. South of the Interstate 10 and Ibican Route 2 bridges, the river opens into a wider, dredged estuary hosting the Port of Willmington and Willmington Navy Yard. At its mouth on the Gulf of Monroe, West Monroe State Highway 1 also tunnels under the river.

Tributaries

Crossings

County Town Carrying
Freemont Willmington/Bishop Line WM-1.png State Highway 1
UR-1.png Urban Road 1
LP-190.png Loop 190
Ferris/Bishop Line I-10.svg Interstate 10
US 2.svg Ibican Route 2
WMS-421.png Spur 421
Willmington RR-67.png Rural Road 67
I-610.svg Interstate 610
WM-7.png State Highway 7
Shelby Shelby LP-8.png Loop 8
WM-54.png State Highway 54
WM-105.png State Highway 105
Washington WM-34.png State Highway 34
RR-82.png Rural Road 82
Lee WM-24.png State Highway 24
Southlake US 64.svg Ibican Route 64
WM-189.png State Highway 189
WM-213.png State Highway 213
Cameron/Webb line Alta WM-4.png State Highway 4
Cameron/Brooks line Beaverton US 59.svg Ibican Route 59
Mansfield WM-130.png State Highway 130
Abilene/Mansfield Line UR-7.png Urban Road 7
I-30.svg Interstate 30
WM-125.pngRR-26.png State Highway 125/Rural Road 26
Brooks/Baylor line Richfield WM-125.png State Highway 125
Walker/Baylor line Wilkesville WM-46.png State Highway 46
Vinton WM-245.png State Highway 245
Walker Katy WM-89.png State Highway 89
I-25.svg Interstate 25

Template:Waters of West Monroe