Lake Wallace Dam
Lake Wallace Dam is a dam located in Marlboro County, South Carolina, built in 1955. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Lake Wallace Dam
The primary purpose of Lake Wallace Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Sc Department Of Natural Resources (state). It impounds the Crooked Creek.
The dam stands 19 feet tall, creates a reservoir covering 442 acres, and has a maximum storage capacity of 1,170 acre-feet. Completed in 1955, 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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 05/13/2024.
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 South Carolina 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 | South Carolina |
| County | Marlboro |
| River/Stream | Crooked Creek |
| Coordinates | 34.63110, -79.68170 |
Physical Characteristics
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 1,170 acre-ft |
| Max Storage | 1,170 acre-ft |
| Normal Storage | 832 acre-ft |
| Surface Area | 442 acres |
Ownership & Safety
| Purpose | Irrigation |
| Owner | SC DEPARTMENT OF NATURAL RESOURCES |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 05/13/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | SCD00021 |
| Federal ID | SCD00021 |
| More Info | State Dam Safety Program |