Alma Mill 3
Alma Mill 3 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.
About Alma Mill 3
The primary purpose of Alma Mill 3 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 Mill Creek.
The dam stands 34 feet tall and stretches 620 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 55 acre-feet, and collects water from a drainage area of 1 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 05/14/2013. That was over 12 years ago.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Wisconsin |
| County | Buffalo |
| Nearest City | None |
| River/Stream | Tr Mill Creek |
| Coordinates | 44.33441, -91.86582 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 620 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Max Storage | 55 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Buffalo County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/14/2013 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00349 |
| Federal ID | WI00349 |
| More Info | State Dam Safety Program |