Johnsons Mountain Lake Dam is an earth dam located in Washington County, Texas, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 780 ft long, taller than 59% 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 Johnsons Mountain Lake Dam
The primary purpose of Johnsons Mountain Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ralph Johnson (private). It impounds the Tr-jerdelle Creek.
The dam stands 27 feet tall and stretches 780 feet across, and has a maximum storage capacity of 272 acre-feet. Completed in 1963, 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 | Washington |
| River/Stream | Tr-jerdelle Creek |
| Coordinates | 30.26918, -96.57518 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 780 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 272 acre-ft |
| Max Storage | 272 acre-ft |
| Normal Storage | 202 acre-ft |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | Ralph Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TX00055 |
| Federal ID | TX00055 |
| More Info | State Dam Safety Program |