Marshall
Marshall is a gravity dam located in Dane County, Wisconsin, built in 1870. It carries a Significant hazard potential classification and has a fair condition assessment.
About Marshall
Marshall is a dam in Dane, Wisconsin. The dam is owned by Blaschka, Bill (private). It impounds the Waterloo Creek near Marshall.
The dam stands 15 feet tall and stretches 100 feet across, creates a reservoir covering 194 acres, has a maximum storage capacity of 1,100 acre-feet, and collects water from a drainage area of 70 square miles. Completed in 1870, the structure is one of the older dams in the region, with over a century and a half of service.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 12/05/2020.
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Location
| State | Wisconsin |
| County | Dane |
| Nearest City | Marshall |
| River/Stream | Waterloo Creek |
| Coordinates | 43.16727, -89.06066 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 100 ft |
| Year Completed | 1870 (156 years old) |
Storage & Hydraulics
| NID Storage | 1,100 acre-ft |
| Max Storage | 1,100 acre-ft |
| Normal Storage | 320 acre-ft |
| Surface Area | 194 acres |
| Drainage Area | 70 sq mi |
| Max Discharge | 1,520 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | Blaschka, Bill |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/05/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | WI00117 |
| Federal ID | WI00117 |
| More Info | State Dam Safety Program |