Mannford Lake is an earth dam located in Creek County, Oklahoma, built in 1950. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 50 ft50 ft tall and 2,892 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Mannford Lake
The primary purpose of Mannford Lake 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 Town of Mannford (local government). It impounds the Tributary of Little Salt Creek near Keystone Reservoir.
The dam stands 50 feet tall and stretches 2,892 feet across, creates a reservoir covering 293 acres, has a maximum storage capacity of 9,000 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1950, the structure is well-established, with more than 75 years of service.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 11/06/2020.
At 50 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Oklahoma |
| County | Creek |
| Nearest City | Keystone Reservoir |
| River/Stream | Tributary of Little Salt Creek |
| Coordinates | 36.09985, -96.35504 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 2,892 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 9,000 acre-ft |
| Max Storage | 9,000 acre-ft |
| Normal Storage | 5,400 acre-ft |
| Surface Area | 293 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 19,600 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Town of Mannford |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/06/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OK00567 |
| Federal ID | OK00567 |
| More Info | State Dam Safety Program |