Lake Thunderbird Dam is an earth dam located in Bastrop County, Texas, built in 1962. It carries a Significant hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 1,200 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Lake Thunderbird Dam
The primary purpose of Lake Thunderbird Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lake Thunderbird Poa (private). It impounds the Tr-gravelly Crk.
The dam stands 21 feet tall and stretches 1,200 feet across, and has a maximum storage capacity of 290 acre-feet. Completed in 1962, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 03/04/2010. That was over 16 years ago.
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Location
| State | Texas |
| County | Bastrop |
| River/Stream | Tr-gravelly Crk |
| Coordinates | 30.05982, -97.11082 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 290 acre-ft |
| Max Storage | 290 acre-ft |
| Normal Storage | 159 acre-ft |
| Max Discharge | 1,100 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lake Thunderbird Poa |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 03/04/2010 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX02714 |
| Federal ID | TX02714 |
| More Info | State Dam Safety Program |