Winnibigoshish Dam - Dike 1
Winnibigoshish Dam - Dike 1 is an earth dam located in Cass County, Minnesota, built in 1884. It carries a Significant hazard potential classification.
About Winnibigoshish Dam - Dike 1
The primary purpose of Winnibigoshish Dam - Dike 1 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Usace - St. Paul District (federal). It impounds the Mississippi River near Ballclub.
The dam stands 5 feet tall and stretches 50 feet across, creates a reservoir covering 68,000 acres, has a maximum storage capacity of 550,000 acre-feet, and collects water from a drainage area of 1,442 square miles. Completed in 1884, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 07/14/2021.
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Location
| State | Minnesota |
| County | Cass |
| Nearest City | Ballclub |
| River/Stream | Mississippi River |
| Coordinates | 47.34950, -94.25040 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 5 ft |
| Dam Height | 5 ft |
| Dam Length | 50 ft |
| Year Completed | 1884 (142 years old) |
Storage & Hydraulics
| NID Storage | 550,000 acre-ft |
| Max Storage | 550,000 acre-ft |
| Normal Storage | 220,000 acre-ft |
| Surface Area | 68,000 acres |
| Drainage Area | 1,442 sq mi |
| Max Discharge | 10,000 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | USACE - St. Paul District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 07/14/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MN00586 |
| Federal ID | MN00586S001 |
| More Info | State Dam Safety Program |