STEPHENSON, Mich. Jan. 29, 2018 – Flooding will not impact the Back Forty Mine. The mine is located on a small bluff above the Menominee River, outside of the 100-year floodplain. A 100-year flood is an event that has the probability of occurring once in 100 years. If such an event were to happen, studies suggest the river would reach roughly 10 feet below the top of the bluff. Also, if we experience an extreme storm event, an emergency spillway will channel water from site to the contact water basins and the open pit. The basins alone can hold 161 million gallons of water.

Since water takes the path of least resistance, it would likely spread out into Wisconsin and downriver. The MDEQ has provided a FAQ regarding the Menominee River Floodplain and the Back Forty Mine. You can access the entire FAQ on the MDEQ website.

MDEQ Floodplain Map















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