Johnson Dam is an earth dam located in Washington County, Alabama, built in 1940. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 695 ft long, taller than 50% 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 Dam
The primary purpose of Johnson Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Timothy G Knapp (private). It impounds the Bates Creek-offstream near Sims Chapel.
The dam stands 25 feet tall and stretches 695 feet across, and has a maximum storage capacity of 210 acre-feet. Completed in 1940, 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.
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Location
| State | Alabama |
| County | Washington |
| Nearest City | Sims Chapel |
| River/Stream | Bates Creek-offstream |
| Coordinates | 31.23833, -88.15167 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Length | 695 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 210 acre-ft |
| Max Storage | 210 acre-ft |
| Normal Storage | 193 acre-ft |
Ownership & Safety
| Purpose | Recreation |
| Owner | Timothy G Knapp |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | AL00218 |
| Federal ID | AL00218 |
| More Info | ASDSO on Alabama (no state dam safety program) |