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Green Tier Participant
to become a Green Tier participant.
DNR contact
Dan Helsel
910 Highway 54 E
Black River Falls WI 54615
Cell 715-797-8601
Fax 715-284-1737
Company contact
Jeremy Niemeier
Senior environmental specialist
20319 State Hwy 21
Tomah WI 54660
Fax 608-372-4765
Unimin Corporation - Tunnel City Facility [exit DNR]

Unimin Corporation - Tunnel City Facility Functionally Equivalent to ISO 14001 Tier 1 participant since 2/24/2014

The Unimin Corporation’s Tunnel City facility is located near Tomah in west central Wisconsin. This facility mines non-metallic minerals utilizing open pit quarrying to produce industrial sand. Unimin has other locations throughout the United States, Canada and Mexico. The company is a member of the Wisconsin Industrial Sand Association, an organization that requires Green Tier enrollment.

Annual report tidbit

Unimin combined several innovative water management technologies to recycle water, reducing the amount of clean water drawn from the supplemental sources. These technologies allowed Tunnel City to reduce the expected makeup water requirement by 97 percent, from 38,000 liters per minute to 1,150 liters per minute.

Environmental activities

The Tunnel City facility plans to incorporate “state-of-the-art technologies” to minimize water and energy consumption, utilize process and design controls to help minimize impacts to the surrounding environment and will work to re-establish pine barren habitat, oak savannah habitat and native prairie plants to the landscape. The company is also a DNR Habitat Conservation Partner for the Karner Blue Butterfly and will help re-establish a bat hibernaculum as a partner in DNR’s Bat Habitat Program.


Acceptance letter


News release

Last revised: Thursday March 22 2018