Johnson Lake Dam is an earth dam located in Bandera County, Texas, built in 1961. It carries a Significant hazard potential classification.
Dam profile
NID height · 38 ft38 ft tall and 425 ft long, taller than 84% 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 Johnson Lake Dam
The primary purpose of Johnson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Benny Johnson;ranch at Walnut Springs LLC (private). It impounds the Mickle Creek near Medina.
The dam stands 38 feet tall and stretches 425 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 159 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1961, 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. The most recent inspection on record was 06/30/2010. That was over 16 years ago.
At 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Texas |
| County | Bandera |
| Nearest City | Medina |
| River/Stream | Mickle Creek |
| Coordinates | 29.83060, -99.37718 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 425 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 159 acre-ft |
| Max Storage | 159 acre-ft |
| Normal Storage | 81 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 4,413 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Benny Johnson;ranch at Walnut Springs LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 06/30/2010 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX02911 |
| Federal ID | TX02911 |
| More Info | State Dam Safety Program |