Cahaba Lake is an earth dam located in Jefferson County, Alabama, built in 1946. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 100 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 Cahaba Lake
The primary purpose of Cahaba Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Stonehenge Inc (private). It impounds the Dolly Brook near Sw Rocky Ridge.
The dam stands 18 feet tall and stretches 100 feet across, and has a maximum storage capacity of 125 acre-feet. Completed in 1946, 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 | Jefferson |
| Nearest City | Sw Rocky Ridge |
| River/Stream | Dolly Brook |
| Coordinates | 33.40500, -86.76000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Length | 100 ft |
| Year Completed | 1946 (80 years old) |
Storage & Hydraulics
| NID Storage | 125 acre-ft |
| Max Storage | 125 acre-ft |
| Normal Storage | 82 acre-ft |
| Max Discharge | 390 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Stonehenge Inc |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | AL01254 |
| Federal ID | AL01254 |
| More Info | ASDSO on Alabama (no state dam safety program) |