Mustang Lake East Dam
Mustang Lake East Dam is an earth dam located in Brazoria County, Texas, built in 1938. It carries a High hazard potential classification.
About Mustang Lake East Dam
The primary purpose of Mustang Lake East Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Gulf Coast Water Authority (local government). It impounds the Mustang Bayou.
The dam stands 13 feet tall and stretches 20,500 feet across, creates a reservoir covering 320 acres, has a maximum storage capacity of 3,775 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1938, 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. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 04/18/1985. That was 40 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.
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 | Brazoria |
| River/Stream | Mustang Bayou |
| Coordinates | 29.29376, -95.18649 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 20,500 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 3,775 acre-ft |
| Max Storage | 3,775 acre-ft |
| Normal Storage | 2,940 acre-ft |
| Surface Area | 320 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | GULF COAST WATER AUTHORITY |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 04/18/1985 |
| Emergency Action Plan | No |
Identifiers
| NID ID | TX01773 |
| Federal ID | TX01773 |
| More Info | State Dam Safety Program |