Williamson Dam
Williamson Dam is a buttress dam located in Eastland County, Texas, built in 1923. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Williamson Dam
The primary purpose of Williamson 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 Cisco (local government). It impounds the Sandy Creek.
The dam stands 96 feet tall and stretches 1,064 feet across, creates a reservoir covering 1,817 acres, has a maximum storage capacity of 32,800 acre-feet, and collects water from a drainage area of 26 square miles. Completed in 1923, the structure is over a century 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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 01/12/2024.
At 96 feet, this dam is taller than 98% 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 Texas 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 | Texas |
| County | Eastland |
| River/Stream | Sandy Creek |
| Coordinates | 32.43944, -98.98444 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 96 ft |
| Dam Height | 96 ft |
| Dam Length | 1,064 ft |
| Year Completed | 1923 (103 years old) |
Storage & Hydraulics
| NID Storage | 32,800 acre-ft |
| Max Storage | 32,800 acre-ft |
| Normal Storage | 26,000 acre-ft |
| Surface Area | 1,817 acres |
| Drainage Area | 26 sq mi |
| Max Discharge | 25,600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF CISCO |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 01/12/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX01409 |
| Federal ID | TX01409 |
| More Info | State Dam Safety Program |