Hinnah Lake Dam
Hinnah Lake Dam is an earth dam located in St. Charles County, Missouri, built in 1972. It carries a Low hazard potential classification.
About Hinnah Lake Dam
The primary purpose of Hinnah 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 W.h. (waldo) Hinnah (private). It impounds the Tr-bigelow Creek near Augusta.
The dam stands 30 feet tall and stretches 450 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 34 acre-feet, and collects water from a drainage area of 44 square miles. Completed in 1972, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Missouri |
| County | St. Charles |
| Nearest City | Augusta |
| River/Stream | Tr-bigelow Creek |
| Coordinates | 38.59510, -90.93266 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 450 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 34 acre-ft |
| Max Storage | 34 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 44 sq mi |
| Max Discharge | 44 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | W.H. (WALDO) HINNAH |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31429 |
| Federal ID | MO31429 |
| More Info | State Dam Safety Program |