Lake Cooper Dam
Lake Cooper Dam is an earth dam located in Archer County, Texas, built in 1953. It carries a Significant hazard potential classification and has a poor condition assessment.
About Lake Cooper Dam
The primary purpose of Lake Cooper Dam 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 Olney (local government). It impounds the Mesquite Creek.
The dam stands 46 feet tall and stretches 2,050 feet across, creates a reservoir covering 261 acres, has a maximum storage capacity of 7,163 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1953, 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 02/08/2023.
At 46 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | Texas |
| County | Archer |
| River/Stream | Mesquite Creek |
| Coordinates | 33.44825, -98.78350 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 2,050 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 7,163 acre-ft |
| Max Storage | 7,163 acre-ft |
| Normal Storage | 4,500 acre-ft |
| Surface Area | 261 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 2 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF OLNEY |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 02/08/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | TX00996 |
| Federal ID | TX00996 |
| More Info | State Dam Safety Program |