Alma Mill 4 is an earth dam located in Buffalo County, Wisconsin, built in 1963. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 32 ft32 ft tall and 540 ft long, taller than 74% 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 Alma Mill 4
The primary purpose of Alma Mill 4 is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Buffalo County (local government). It impounds the Tr Fimian Creek.
The dam stands 32 feet tall and stretches 540 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 70 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1963, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 06/10/2016. That was over 10 years ago.
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Location
| State | Wisconsin |
| County | Buffalo |
| Nearest City | None |
| River/Stream | Tr Fimian Creek |
| Coordinates | 44.34379, -91.86622 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 540 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,240 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Buffalo County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/10/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00350 |
| Federal ID | WI00350 |
| More Info | State Dam Safety Program |