Holly Dam, also known as Stiff's Millpond Dam, is a significant local government-owned structure located in Fenton, Michigan, along the Shiawassee River.
Wind
Humidity
Built in 1840, this Earth and Gravity dam stands at a height of 12 feet and stretches 400 feet in length. With a primary purpose of recreation, the dam offers a storage capacity of 555 acre-feet, a normal storage of 430 acre-feet, and a surface area of 90 acres, making it a crucial water resource in the area.
Despite its historical significance and recreational value, Holly Dam is currently assessed as being in poor condition with a significant hazard potential. The dam is regulated and inspected by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE) to ensure public safety. In the event of an emergency, the dam's Emergency Action Plan (EAP) is expected to meet safety guidelines, with risk assessments indicating a very high risk level. With a maximum discharge capacity of 600 cubic feet per second, the dam plays a vital role in flood control and water management in the region.
As a prominent feature in Oakland County, Michigan, Holly Dam serves as both a recreational hub and a critical water resource. Its historical significance, structural design, and storage capacity make it an essential element in the local ecosystem. However, ongoing maintenance and risk management measures are necessary to ensure the safety and longevity of this important dam for the community and the environment.
Year Completed |
1840 |
Dam Length |
400 |
Dam Height |
12 |
River Or Stream |
Shiawassee River |
Primary Dam Type |
Earth |
Surface Area |
90 |
Hydraulic Height |
11.5 |
Drainage Area |
40.5 |
Nid Storage |
555 |
Structural Height |
12 |
Hazard Potential |
Significant |
Nid Height |
12 |
Huron River At Milford
|
73cfs |
Kearsley Creek Near Davison
|
35cfs |
Huron River Near New Hudson
|
105cfs |
Flint River Near Flint
|
239cfs |
Clinton River At Auburn Hills
|
123cfs |
Farmers Creek Near Lapeer
|
12cfs |
| Location | Reservations | Toilets |
|---|---|---|
Seven Lakes State Park
|
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Group Camping Area 2
|
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Group Camping Area 3
|
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Group Camping Area 1
|
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Group Camping Area 4
|
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Group Camping Area 5
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