Ozark Lock and Dam, also known as Ozark Lake, is a federal-owned structure located in Dardanelle, Arkansas.
Wind
Humidity
Completed in 1969 by the US Army Corps of Engineers, this concrete gravity dam serves primarily for navigation purposes on the Arkansas River. With a dam height of 42 feet and a hydraulic height of 33 feet, this multi-arch dam spans 2,500 feet in length and has a storage capacity of 148,400 acre-feet.
While offering hydroelectric power generation, recreational opportunities, and navigation support, Ozark Lock and Dam also presents significant flood risk potential, as indicated by a very high risk assessment rating. The US Army Corps of Engineers actively manages these risks by implementing monitoring and maintenance measures, engaging with local emergency managers, and continually updating emergency action plans to ensure the safety and structural integrity of the dam. With a spillway width of 750 feet and one lock measuring 600 feet in length and 110 feet in width, Ozark Lock and Dam remains a critical infrastructure for water resource management in the region, supported by the dedicated efforts of the USACE.
Year Completed |
1969 |
Dam Length |
2500 |
Dam Height |
42 |
River Or Stream |
ARKANSAS |
Primary Dam Type |
Concrete |
Surface Area |
10600 |
Length Of Locks |
600 |
Hydraulic Height |
33 |
Drainage Area |
151800 |
Nid Storage |
148400 |
Structural Height |
100 |
Hazard Potential |
Significant |
Foundations |
Rock |
Nid Height |
100 |
Mulberry River Near Mulberry. Ar
|
380cfs |
Jack Creek Near Winfrey
|
6cfs |
Frog Bayou At Winfrey
|
13cfs |
Jones Creek At Winfrey
|
3cfs |
Petit Jean River Near Booneville
|
83cfs |
Arkansas River At Ft. Smith
|
21700cfs |
| Location | Reservations | Toilets |
|---|---|---|
Aux Arc
|
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Citadel Bluff
|
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Dogwood Drive - Lake Eufaula State Park
|
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Horsehead Lake
|
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Horsehead Lake Recreation Area
|