Johnson Lake Dam
Johnson Lake Dam is an earth dam located in Franklin County, Missouri, built in 1970. It carries a Low hazard potential classification.
About Johnson Lake Dam
The primary purpose of Johnson 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 Ethel Johnson (private). It impounds the Tr-winch Creek near Pacific.
The dam stands 22 feet tall and stretches 460 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 69 acre-feet, and collects water from a drainage area of 150 square miles. Completed in 1970, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Missouri |
| County | Franklin |
| Nearest City | Pacific |
| River/Stream | Tr-winch Creek |
| Coordinates | 38.44195, -90.78012 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 460 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 69 acre-ft |
| Max Storage | 69 acre-ft |
| Normal Storage | 36 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 150 sq mi |
| Max Discharge | 650 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | ETHEL JOHNSON |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO31491 |
| Federal ID | MO31491 |
| More Info | State Dam Safety Program |