Lake Holdenville
Lake Holdenville is an earth dam located in Hughes County, Oklahoma, built in 1931. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Lake Holdenville
The primary purpose of Lake Holdenville is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Holdenville (local government). It impounds the Tr-little River near Calvin.
The dam stands 65 feet tall and stretches 2,085 feet across, creates a reservoir covering 550 acres, has a maximum storage capacity of 15,600 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1931, the structure is well-established, with more than 75 years of service.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 12/15/2022.
At 65 feet, this dam is taller than 96% 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 | Hughes |
| Nearest City | Calvin |
| River/Stream | Tr-little River |
| Coordinates | 35.02820, -96.36972 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 65 ft |
| Dam Height | 65 ft |
| Dam Length | 2,085 ft |
| Year Completed | 1931 (95 years old) |
Storage & Hydraulics
| NID Storage | 15,600 acre-ft |
| Max Storage | 15,600 acre-ft |
| Normal Storage | 11,000 acre-ft |
| Surface Area | 550 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 11,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF HOLDENVILLE |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/15/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OK10479 |
| Federal ID | OK10479 |
| More Info | State Dam Safety Program |