Janssen Lake Dam
Janssen Lake Dam is an earth dam located in Franklin County, Missouri, built in 1974. It carries a Low hazard potential classification.
About Janssen Lake Dam
Janssen Lake Dam is a dam in Franklin, Missouri. The dam is owned by Richard Janssen (private). It impounds the Tr To St Johns Creek near Washington.
The dam stands 30 feet tall, creates a reservoir covering 6 acres, has a maximum storage capacity of 96 acre-feet, and collects water from a drainage area of 43 square miles. Completed in 1974, 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 | Franklin |
| Nearest City | Washington |
| River/Stream | Tr To St Johns Creek |
| Coordinates | 38.43795, -91.17361 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 96 acre-ft |
| Max Storage | 96 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 43 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | RICHARD JANSSEN |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO11390 |
| Federal ID | MO11390 |
| More Info | State Dam Safety Program |