Porzeinski Lake Dam
Porzeinski Lake Dam is a dam located in St. Francois County, Missouri. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Porzeinski Lake Dam
Porzeinski Lake Dam is a dam in St. Francois, Missouri. The dam is private-owned. It impounds the Three Hill Creek near Morse Mill.
The dam stands 50 feet tall and stretches 475 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 333 acre-feet, and collects water from a drainage area of 1 square miles.
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. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 04/29/2019.
At 50 feet, this dam is taller than 93% 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 Missouri 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 | Missouri |
| County | St. Francois |
| Nearest City | Morse Mill |
| River/Stream | Three Hill Creek |
| Coordinates | 37.95921, -90.63340 |
Physical Characteristics
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 475 ft |
Storage & Hydraulics
| NID Storage | 333 acre-ft |
| Max Storage | 333 acre-ft |
| Normal Storage | 221 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 04/29/2019 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MO60583 |
| Federal ID | MO60583 |
| More Info | State Dam Safety Program |