Patterson Lake
Patterson Lake is an earth dam located in Calhoun County, Alabama. It carries a High hazard potential classification.
About Patterson Lake
The primary purpose of Patterson Lake 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 Patterson Otis Lee & Susan Hay (private). It impounds the Tallasseehachee Creek Trib 1 near Jacksonville.
The dam stands 11 feet tall and stretches 300 feet across, creates a reservoir covering 7 acres, and has a maximum storage capacity of 49 acre-feet.
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. Notably, no emergency action plan is currently on file for this high-hazard dam.
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 Alabama 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 | Alabama |
| County | Calhoun |
| Nearest City | Jacksonville |
| River/Stream | Tallasseehachee Creek Trib 1 |
| Coordinates | 33.80318, -85.75245 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 300 ft |
Storage & Hydraulics
| NID Storage | 49 acre-ft |
| Max Storage | 49 acre-ft |
| Surface Area | 7 acres |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | PATTERSON OTIS LEE & SUSAN HAY |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | AL83476 |
| Federal ID | AL83476 |
| More Info | State Dam Safety Program |