Upper Mulberry River Ws Str. # 7 is an earth dam located in Gwinnett County, Georgia, built in 1980. It carries a High hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 44 ft44 ft tall, taller than 89% 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 Upper Mulberry River Ws Str. # 7
The primary purpose of Upper Mulberry River Ws Str. # 7 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 Gwinnett County Board of Commissioners (local government). It impounds the Duncan Creek.
The dam stands 44 feet tall, and has a maximum storage capacity of 1,796 acre-feet. Completed in 1980, the structure is 46 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 03/09/2017. That was 9 years ago, which is on the longer end for a high-hazard structure.
At 44 feet, this dam is taller than 89% of dams nationwide.
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. The Georgia dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Georgia |
| County | Gwinnett |
| River/Stream | Duncan Creek |
| Coordinates | 34.09472, -83.87694 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 1,796 acre-ft |
| Max Storage | 1,796 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Gwinnett County Board of Commissioners |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/09/2017 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | GA05328 |
| Federal ID | GA05328 |
| More Info | State Dam Safety Program |