Key Lake Dam is an earth dam located in DeKalb County, Georgia, built in 1950. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 800 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 Key Lake Dam
The primary purpose of Key Lake Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Hanson Aggregates Southeast, Inc. (private). It impounds the Unknown near Rock Chapel.
The dam stands 24 feet tall and stretches 800 feet across, creates a reservoir covering 16 acres, and has a maximum storage capacity of 136 acre-feet. Completed in 1950, 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. The most recent inspection on record was 05/01/2005. That was over 21 years ago.
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Location
| State | Georgia |
| County | DeKalb |
| Nearest City | Rock Chapel |
| River/Stream | Unknown |
| Coordinates | 33.73111, -84.09722 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 800 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 136 acre-ft |
| Max Storage | 136 acre-ft |
| Normal Storage | 104 acre-ft |
| Surface Area | 16 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Hanson Aggregates Southeast, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/01/2005 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | GA01329 |
| Federal ID | GA01329 |
| More Info | State Dam Safety Program |