Johnsons Lake is an earth dam located in Jefferson County, Alabama, built in 1954. It carries a High hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 740 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 Johnsons Lake
The primary purpose of Johnsons Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by O L & W R Johnson (private). It impounds the Tr-rice Creek near Greenwood.
The dam stands 24 feet tall and stretches 740 feet across, and has a maximum storage capacity of 130 acre-feet. Completed in 1954, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Notably, no emergency action plan is currently on file for this high-hazard dam.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. Alabama is the only state with no dam safety program, so there is no state office to contact about this structure; the federal record above is what exists. ASDSO's page on Alabama explains the gap.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Alabama |
| County | Jefferson |
| Nearest City | Greenwood |
| River/Stream | Tr-rice Creek |
| Coordinates | 33.32755, -86.89283 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Length | 740 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 130 acre-ft |
| Max Storage | 130 acre-ft |
| Normal Storage | 112 acre-ft |
| Max Discharge | 160 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | O L & W R Johnson |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | AL01527 |
| Federal ID | AL01527 |
| More Info | ASDSO on Alabama (no state dam safety program) |