Louis Simpson Dam is a dam located in York County, South Carolina, built in 1965. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 18 ft18 ft tall. 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 Louis Simpson Dam
The primary purpose of Louis Simpson Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Marie S Simpson (private). It impounds the Tr-neelys Creek.
The dam stands 18 feet tall, creates a reservoir covering 6 acres, and has a maximum storage capacity of 59 acre-feet. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 03/20/2024.
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Location
| State | South Carolina |
| County | York |
| River/Stream | Tr-neelys Creek |
| Coordinates | 34.86780, -80.94730 |
Physical Characteristics
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 59 acre-ft |
| Max Storage | 59 acre-ft |
| Normal Storage | 37 acre-ft |
| Surface Area | 6 acres |
Ownership & Safety
| Purpose | Recreation |
| Owner | Marie S Simpson |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 03/20/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | SCD03651 |
| Federal ID | SCD03651 |
| More Info | State Dam Safety Program |