The Unadilla Mill Dam, located in Unadilla, Michigan, was completed in 1860 and serves primarily for recreation purposes.
Wind
Humidity
This earth dam spans 376 feet in length with a height of 10 feet, providing a storage capacity of 65 acre-feet. The dam is situated on Hell Creek, within Livingston County, and is under the jurisdiction of the Buffalo District. Despite its historical significance, the dam has not been regulated or inspected by the state, presenting a significant hazard potential.
With a spillway width of 4 feet and a controlled spillway type, the Unadilla Mill Dam has a very high risk assessment rating. However, the condition of the dam has not been officially assessed or rated, and there is no Emergency Action Plan (EAP) in place. The dam's risk management measures, as well as its compliance with guidelines and preparation for emergencies, are currently unknown. The dam's location and structural characteristics make it a water resource and climate enthusiast's point of interest, given its historical significance and potential risks associated with its condition.
Although the Unadilla Mill Dam does not have state permitting, inspection, or enforcement, its location on Hell Creek and its recreational purpose draw attention to the need for further assessment and potential risk mitigation measures. Enthusiasts interested in water resources and climate may find the dam's history, design, and risk profile fascinating, as it presents a unique case study for the intersection of historical infrastructure and modern safety considerations in the face of changing environmental conditions.
Year Completed |
1860 |
Dam Length |
376 |
Dam Height |
10 |
River Or Stream |
Hell Creek |
Primary Dam Type |
Earth |
Surface Area |
4.3 |
Hydraulic Height |
10 |
Nid Storage |
65 |
Structural Height |
10 |
Hazard Potential |
Significant |
Nid Height |
10 |
Mill Creek Near Dexter
|
29cfs |
Huron River Near Hamburg
|
150cfs |
River Raisin Near Manchester
|
17cfs |
Huron River At Ann Arbor
|
293cfs |
Red Cedar River Near Williamston
|
30cfs |
Huron River Near New Hudson
|
105cfs |
| Location | Reservations | Toilets |
|---|---|---|
Pinckney State Rec Area
|
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Menominee
|
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Erie
|
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Munhacke
|
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Peach Area
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Sauk
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