Thompson Lake Dam is an earth dam located in Bandera County, Texas, built in 1964. It carries a Significant hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 750 ft long, taller than 50% of U.S. dams with a recorded height. 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 Thompson Lake Dam
The primary purpose of Thompson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Madrona Creek Ranch LP (private). It impounds the Mickle Creek near Medina.
The dam stands 25 feet tall and stretches 750 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 263 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1964, 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 06/30/2010. That was over 16 years ago.
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Location
| State | Texas |
| County | Bandera |
| Nearest City | Medina |
| River/Stream | Mickle Creek |
| Coordinates | 29.84054, -99.36939 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 750 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 263 acre-ft |
| Max Storage | 263 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,846 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Madrona Creek Ranch LP |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 06/30/2010 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TX02908 |
| Federal ID | TX02908 |
| More Info | State Dam Safety Program |