Copan Dam - Caney Levee
Copan Dam - Caney Levee is a gravity dam located in Montgomery County, Oklahoma, built in 1983. It carries a High hazard potential classification.
About Copan Dam - Caney Levee
The primary purpose of Copan Dam - Caney Levee is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Usace - Tulsa District (federal). It impounds the Little Caney near Dewey.
The dam stands 73 feet tall and stretches 7,730 feet across, creates a reservoir covering 4,850 acres, has a maximum storage capacity of 338,000 acre-feet, and collects water from a drainage area of 505 square miles. Completed in 1983, the structure is 43 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 05/17/2021.
At 73 feet, this dam is taller than 97% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Oklahoma dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oklahoma |
| County | Montgomery |
| Nearest City | Dewey |
| River/Stream | Little Caney |
| Coordinates | 37.00945, -95.94955 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 73 ft |
| Dam Height | 73 ft |
| Dam Length | 7,730 ft |
| Year Completed | 1983 (43 years old) |
Storage & Hydraulics
| NID Storage | 338,000 acre-ft |
| Max Storage | 338,000 acre-ft |
| Normal Storage | 43,400 acre-ft |
| Surface Area | 4,850 acres |
| Drainage Area | 505 sq mi |
| Max Discharge | 199,070 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | USACE - Tulsa District |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 05/17/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK21489 |
| Federal ID | OK21489S001 |
| More Info | State Dam Safety Program |