Johnson Dam No 2 is a buttress dam located in Tom Green County, Texas, built in 1931. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 100 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Johnson Dam No 2
The primary purpose of Johnson Dam No 2 is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of San Angelo (local government). It impounds the North Concho River near San Angelo.
The dam stands 20 feet tall and stretches 100 feet across, and has a maximum storage capacity of 150 acre-feet. Completed in 1931, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 08/09/1979. That was over 47 years ago.
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Location
| State | Texas |
| County | Tom Green |
| Nearest City | San Angelo |
| River/Stream | North Concho River |
| Coordinates | 31.45881, -100.43268 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 100 ft |
| Year Completed | 1931 (95 years old) |
Storage & Hydraulics
| NID Storage | 150 acre-ft |
| Max Storage | 150 acre-ft |
| Normal Storage | 150 acre-ft |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of San Angelo |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/09/1979 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX03137 |
| Federal ID | TX03137 |
| More Info | State Dam Safety Program |