Cobb Lake Dam is an earth dam located in Greene County, North Carolina, built in 1962. It carries a Low hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 650 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 Cobb Lake Dam
The primary purpose of Cobb Lake Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Alton P Cobb (private). It impounds the Hullett Branch near La Grange.
The dam stands 16 feet tall and stretches 650 feet across, creates a reservoir covering 59 acres, has a maximum storage capacity of 900 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1962, 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 02/05/2008. That was over 18 years ago.
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Location
| State | North Carolina |
| County | Greene |
| Nearest City | La Grange |
| River/Stream | Hullett Branch |
| Coordinates | 35.39720, -77.79850 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Length | 650 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 900 acre-ft |
| Max Storage | 900 acre-ft |
| Normal Storage | 179 acre-ft |
| Surface Area | 59 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 330 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Alton P Cobb |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 02/05/2008 |
| Emergency Action Plan | No |
Identifiers
| NID ID | NC00979 |
| Federal ID | NC00979 |
| More Info | State Dam Safety Program |