W.d. Mayo Lock And Dam
W.d. Mayo Lock And Dam is a gravity dam located in Sequoyah County, Oklahoma, built in 1970. It carries a Significant hazard potential classification.
About W.d. Mayo Lock And Dam
The primary purpose of W.d. Mayo Lock And Dam is navigation. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway. The dam is owned by Usace - Tulsa District (federal). It impounds the Arkansas River near Arkhoma.
The dam stands 71 feet tall and stretches 7,400 feet across, creates a reservoir covering 1,595 acres, has a maximum storage capacity of 15,800 acre-feet, and collects water from a drainage area of 148,084 square miles. Completed in 1970, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 06/04/2024.
At 71 feet, this dam is taller than 96% of all dams in the United States.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oklahoma |
| County | Sequoyah |
| Nearest City | Arkhoma |
| River/Stream | Arkansas River |
| Coordinates | 35.31589, -94.55914 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 71 ft |
| Dam Height | 71 ft |
| Dam Length | 7,400 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 15,800 acre-ft |
| Max Storage | 15,800 acre-ft |
| Normal Storage | 15,800 acre-ft |
| Surface Area | 1,595 acres |
| Drainage Area | 148,084 sq mi |
| Max Discharge | 507,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner | USACE - Tulsa District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 06/04/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK10305 |
| Federal ID | OK10305 |
| More Info | State Dam Safety Program |