Johnson Lake Dam
Johnson Lake Dam is an earth dam located in St. Charles County, Missouri, built in 1970. It carries a Low hazard potential classification.
About Johnson Lake Dam
The primary purpose of Johnson Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mrs Roy Johnson (private). It impounds the Tr-sams Creek near Peruque.
The dam stands 20 feet tall, creates a reservoir covering 9 acres, has a maximum storage capacity of 96 acre-feet, and collects water from a drainage area of 210 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.
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Location
| State | Missouri |
| County | St. Charles |
| Nearest City | Peruque |
| River/Stream | Tr-sams Creek |
| Coordinates | 38.76792, -90.92516 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 96 acre-ft |
| Max Storage | 96 acre-ft |
| Normal Storage | 60 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 210 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | MRS ROY JOHNSON |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10485 |
| Federal ID | MO10485 |
| More Info | State Dam Safety Program |