Mccoy Lake Dam
Mccoy Lake Dam is an earth dam located in Simpson County, Mississippi, built in 2011. It carries a High hazard potential classification and has a poor condition assessment.
About Mccoy Lake Dam
The primary purpose of Mccoy Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by John Mccoy (private). It impounds the Unnamed Stream.
The dam stands 44 feet tall and stretches 700 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 286 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2011, the structure is relatively new.
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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 02/13/2023.
At 44 feet, this dam is taller than 90% 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 Mississippi 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 | Mississippi |
| County | Simpson |
| River/Stream | Unnamed Stream |
| Coordinates | 31.95806, -90.04028 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 700 ft |
| Year Completed | 2011 (15 years old) |
Storage & Hydraulics
| NID Storage | 286 acre-ft |
| Max Storage | 286 acre-ft |
| Normal Storage | 112 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | JOHN MCCOY |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 02/13/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MS06164 |
| Federal ID | MS06164 |
| More Info | State Dam Safety Program |