Hoffman Lake Dam
Hoffman Lake Dam is an earth dam located in Washington County, Missouri, built in 1977. It carries a High hazard potential classification.
About Hoffman Lake Dam
The primary purpose of Hoffman Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Eugene A Hoffman (private). It impounds the Tr-little Indian Creek near Richwoods.
The dam stands 25 feet tall, creates a reservoir covering 10 acres, has a maximum storage capacity of 134 acre-feet, and collects water from a drainage area of 100 square miles. Completed in 1977, the structure is 49 years old.
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.
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 | Washington |
| Nearest City | Richwoods |
| River/Stream | Tr-little Indian Creek |
| Coordinates | 38.17227, -90.82586 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 134 acre-ft |
| Max Storage | 134 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 100 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | EUGENE A HOFFMAN |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31484 |
| Federal ID | MO31484 |
| More Info | State Dam Safety Program |