Johnson Lake Dam is an earth dam located in Spalding County, Georgia, built in 1955. It carries a Low hazard potential classification.
Dam profile
NID height · 26 ft26 ft tall and 695 ft long, taller than 55% 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 Thomas E. Johnson Etal (private). It impounds the Unknown near Griffin.
The dam stands 26 feet tall and stretches 695 feet across, creates a reservoir covering 23 acres, and has a maximum storage capacity of 315 acre-feet. Completed in 1955, 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 10/01/2012. That was over 14 years ago.
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Location
| State | Georgia |
| County | Spalding |
| Nearest City | Griffin |
| River/Stream | Unknown |
| Coordinates | 33.20583, -84.27278 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 695 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 315 acre-ft |
| Max Storage | 315 acre-ft |
| Normal Storage | 161 acre-ft |
| Surface Area | 23 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Thomas E. Johnson Etal |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/01/2012 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | GA01451 |
| Federal ID | GA01451 |
| More Info | State Dam Safety Program |