Mason Marcks Forsythe 1
Mason Marcks Forsythe 1 is a gravity dam located in Pepin County, Wisconsin, built in 1978. It carries a Low hazard potential classification.
About Mason Marcks Forsythe 1
The primary purpose of Mason Marcks Forsythe 1 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 Marcks, Randall And Kim (private). It impounds the Tributary Little Plum Creek.
The dam stands 25 feet tall and stretches 540 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 76 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1978, the structure is 48 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. The most recent inspection on record was 04/27/2010. That was over 15 years ago.
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Location
| State | Wisconsin |
| County | Pepin |
| Nearest City | None |
| River/Stream | Tributary Little Plum Creek |
| Coordinates | 44.52739, -92.14514 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 540 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 76 acre-ft |
| Max Storage | 76 acre-ft |
| Normal Storage | 7 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 118 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Marcks, Randall and Kim |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 04/27/2010 |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI00870 |
| Federal ID | WI00870 |
| More Info | State Dam Safety Program |