Sergent Lake Dam is an earth dam located in Polk County, Missouri, built in 1977. It carries a Significant hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 950 ft long. 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 Sergent Lake Dam
The primary purpose of Sergent Lake Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Raymond Sergent (private). It impounds the Tr-brush Creek near Hermitage.
The dam stands 23 feet tall and stretches 950 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 77 acre-feet, and collects water from a drainage area of 324 square miles. Completed in 1977, the structure is 49 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.
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Location
| State | Missouri |
| County | Polk |
| Nearest City | Hermitage |
| River/Stream | Tr-brush Creek |
| Coordinates | 37.62482, -93.19762 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 22 ft |
| Dam Length | 950 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 77 acre-ft |
| Max Storage | 77 acre-ft |
| Normal Storage | 42 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 324 sq mi |
| Max Discharge | 221 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Raymond Sergent |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31668 |
| Federal ID | MO31668 |
| More Info | State Dam Safety Program |