Thompson Lake Dam is an earth dam located in Frio County, Texas, built in 1964. It carries a Low hazard potential classification.
Dam profile
NID height · 13 ft13 ft tall and 1,450 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 Thompson Lake Dam
The primary purpose of Thompson Lake 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 Lazy T Cattle Company (private). It impounds the Martin Branch.
The dam stands 13 feet tall and stretches 1,450 feet across, creates a reservoir covering 28 acres, and has a maximum storage capacity of 520 acre-feet. Completed in 1964, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Texas |
| County | Frio |
| River/Stream | Martin Branch |
| Coordinates | 28.66576, -99.10355 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 1,450 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 520 acre-ft |
| Max Storage | 520 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 28 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Lazy T Cattle Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX01718 |
| Federal ID | TX01718 |
| More Info | State Dam Safety Program |