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| Tahlequah Dam | |
|---|---|
| Name | Tahlequah Dam |
| Location | Cherokee County, Oklahoma, United States |
| Coordinates | 35.9211°N 94.9694°W |
| Owner | United States Army Corps of Engineers |
| Dam type | Concrete gravity |
| Height | 33 ft (10 m) |
| Length | 7,300 ft (2,225 m) |
| Opening | 1970 |
| Reservoir | Lake Tenkiller |
| Plant capacity | 18 MW |
Tahlequah Dam is a flood-control and hydroelectric structure on the Illinois River in northeastern Oklahoma that impounds Lake Tenkiller. The facility is managed for multiple uses including navigation, water supply, flood mitigation, and recreation, and is associated with federal, state, tribal, and municipal stakeholders. Its location near Tahlequah situates it within a nexus of regional infrastructure, environmental management, and cultural resources.
The facility sits on the Illinois River adjacent to the city of Tahlequah and the Cherokee Nation, connecting to regional networks including Interstate 40, U.S. Route 62, and State Highway 82, while affecting downstream reaches toward the Arkansas border and the Arkansas River watershed. The project was authorized under federal water resource legislation and constructed by the United States Army Corps of Engineers in coordination with the Bureau of Reclamation, the Tennessee Valley Authority, and state agencies from Oklahoma and Arkansas. Nearby institutions and sites such as Northeastern State University, the Cherokee Nation Tribal Complex, and the Will Rogers Memorial influence policymaking and public engagement, while entities like the Environmental Protection Agency, U.S. Fish and Wildlife Service, and National Oceanic and Atmospheric Administration contribute to regulatory oversight and ecological monitoring.
Initial planning began amid mid-20th-century flood-control initiatives following precedent projects like Hoover Dam, TVA reservoirs, Glen Canyon Dam, and Bonneville Dam; congressional authorization paralleled measures associated with the Flood Control Act and Water Resources Development Act. Early surveys referenced the Cartwright Canal, the Arkansas River Commission, and hydrologic data from the United States Geological Survey and the National Weather Service. Construction employed contractors experienced from projects such as Grand Coulee, Fontana Dam, and Parker Dam, while engineering consultants drew on practices used at Hoover Dam, Oahe Dam, and Shasta Dam. Groundbreaking involved cooperation with the Cherokee Nation government, the Muscogee (Creek) Nation, and local municipalities including Stilwell and Sallisaw. The project timeline intersected with regional developments like the construction of Keystone Dam and the McClellan-Kerr Arkansas River Navigation System.
The structure is a concrete gravity and earthfill embankment with a length and crest profile comparable to projects at Pickwick Landing, Mark Twain Lake, and Searsville Dam, and includes spillways, gated outlets, and a powerhouse. The hydroelectric installation uses Kaplan turbines and Kaplan-generator assemblies similar to installations at Bonneville, Hoover, and Goldisthal, with a modest installed capacity managed under dispatch protocols like those used by Western Area Power Administration and Southeastern Power Administration. Structural features reference standards from the American Society of Civil Engineers, Bureau of Reclamation design manuals, and Federal Energy Regulatory Commission guidance similar to licensing for projects such as Grand Coulee and Lower Granite. The reservoir, Lake Tenkiller, supports piscatorial assemblages akin to those in Lake Texoma, Lake of the Ozarks, and Grand Lake o' the Cherokees, and is monitored using methods employed by the U.S. Geological Survey and Oklahoma Water Resources Board.
Daily operations are coordinated by the United States Army Corps of Engineers with input from the Cherokee Nation, Oklahoma Department of Wildlife Conservation, and local utilities including Public Service Company of Oklahoma and municipal water authorities. Water release schedules align with flood-control plans similar to those used on the Mississippi River, Tennessee River, and Ohio River systems, while hydroelectric dispatch follows protocols practiced by regional balancing authorities such as Southwest Power Pool and the Midcontinent Independent System Operator. Interagency collaboration involves the Environmental Protection Agency, U.S. Fish and Wildlife Service, Bureau of Indian Affairs, and Oklahoma Water Resources Board to address water quality, endangered species concerns like those handled for the pallid sturgeon and mussel conservation programs, and invasive species responses as with zebra mussel and Asian carp management plans.
Impoundment altered riparian and aquatic habitats in ways studied by researchers from the University of Oklahoma, Oklahoma State University, and University of Arkansas, paralleling ecological changes documented at reservoirs such as Lake Cumberland, Table Rock Lake, and Lake Eufaula. Effects on native fishes, freshwater mussels, and migratory birds prompted assessments by Audubon chapters, The Nature Conservancy, and the U.S. Fish and Wildlife Service; mitigation and restoration efforts echo programs at Everglades restoration, Kissimmee River restoration, and habitat banks used in mitigation banking. Water quality issues involving nutrient loading, algal blooms, and sedimentation have been researched by NOAA, the Environmental Protection Agency, and the Oklahoma Conservation Commission, with watershed-scale initiatives coordinated through the Illinois River Watershed Partnership, the Ozark-St. Francis National Forest, and the Arkansas Natural Resources Commission.
The reservoir and downstream river corridor provide boating, fishing, camping, and hiking opportunities promoted by the Corps of Engineers, Oklahoma Tourism and Recreation Department, Cherokee Nation tourism, and local chambers of commerce in Tahlequah and Stilwell. Popular recreational activities mirror those at Lake Ouachita, Beaver Lake, and Grand Lake, and facilities include marinas, picnic areas, and trails developed with funds and guidelines from the National Park Service, American Trails, and state parks systems. Events and tournaments draw anglers affiliated with Bassmaster, Major League Fishing, and collegiate clubs from institutions like Northeastern State University and University of Tulsa, while conservation education involves partnerships with Boy Scouts of America, Girl Scouts of the USA, and local school districts.
The project affects tribal heritage sites and cultural resources of the Cherokee Nation, Muscogee (Creek) Nation, Osage Nation, and other Indigenous communities, intersecting with preservation frameworks used by the National Register of Historic Places and the Advisory Council on Historic Preservation. Economic impacts resemble those documented for regional reservoir projects, influencing local industries including tourism, real estate, agriculture, and municipal utilities, and involving agencies like the Oklahoma Department of Commerce, U.S. Economic Development Administration, and Small Business Administration. Policy discussions engage state legislators, U.S. senators from Oklahoma, local elected officials, nonprofit organizations such as the Oklahoma Wildlife Federation, and academic researchers to balance development, cultural preservation, and environmental stewardship.
Category:Dams in Oklahoma Category:United States Army Corps of Engineers projects Category:Reservoirs in Oklahoma