Johnson Lake Dam is an earth dam located in Zavala County, Texas, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 1,350 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 Johnson Lake Dam
The primary purpose of Johnson Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Belton Johnson (private). It impounds the Chaparrosa Creek.
The dam stands 21 feet tall and stretches 1,350 feet across, and has a maximum storage capacity of 420 acre-feet. Completed in 1966, 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. The most recent inspection on record was 01/12/1972. That was over 54 years ago.
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Location
| State | Texas |
| County | Zavala |
| River/Stream | Chaparrosa Creek |
| Coordinates | 28.84500, -100.01167 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 1,350 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 420 acre-ft |
| Max Storage | 420 acre-ft |
| Normal Storage | 200 acre-ft |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Belton Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/12/1972 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX01814 |
| Federal ID | TX01814 |
| More Info | State Dam Safety Program |