Richard Jahnke is an earth dam located in Pepin County, Wisconsin, built in 1974. It carries a Low hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 600 ft long, taller than 72% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Richard Jahnke
The primary purpose of Richard Jahnke is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Richard Jahnke (private). It impounds the Tr Chippewa.
The dam stands 31 feet tall and stretches 600 feet across, has a maximum storage capacity of 20 acre-feet, and collects water from a drainage area of 0 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 | Wisconsin |
| County | Pepin |
| Nearest City | None |
| River/Stream | Tr Chippewa |
| Coordinates | 44.45000, -92.08000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 600 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 2 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 20 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Richard Jahnke |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WI00805 |
| Federal ID | WI00805 |
| More Info | State Dam Safety Program |