Sandstone Rapids, located in Marinette County, Wisconsin, is a gravity dam on the Peshtigo River with a primary purpose of hydroelectric power generation.
Wind
Humidity
Constructed in 1925 by designers Mead & Scastone, this dam stands at a height of 42 feet and has a storage capacity of 1650 acre-feet. With a maximum discharge of 20,000 cubic feet per second, the dam boasts a controlled spillway with a width of 184 feet.
The dam, owned by a public utility, serves as both a source of renewable energy and a recreational spot for visitors. Despite its historical significance and engineering marvel, Sandstone Rapids poses a high hazard potential and is categorized with a very high risk assessment rating. While the dam is regulated by the Federal Energy Regulatory Commission, state inspection and enforcement are not currently in place.
As an integral part of the water resource infrastructure in the region, Sandstone Rapids provides a glimpse into the intersection of human ingenuity and environmental stewardship. Its presence along the Peshtigo River not only contributes to the local economy through energy generation but also offers opportunities for outdoor recreation. However, the high hazard potential underscores the importance of ongoing maintenance and risk management to ensure the safety and sustainability of this vital water resource structure.
Year Completed |
1925 |
Dam Length |
420 |
Dam Height |
42 |
River Or Stream |
Peshtigo River |
Primary Dam Type |
Gravity |
Surface Area |
150 |
Hydraulic Height |
42 |
Drainage Area |
675 |
Nid Storage |
1650 |
Structural Height |
42 |
Outlet Gates |
Tainter (radial) - 6 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
42 |
Peshtigo River At Porterfield
|
498cfs |
Peshtigo River Near Wabeno
|
226cfs |
Pike River At Amberg
|
186cfs |
Peshtigo River At Peshtigo
|
513cfs |
Menominee River At Koss
|
2010cfs |
Menominee River Near Mc Allister
|
2220cfs |