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Green Tier Participant
to become a Green Tier participant.
Public comment periods

Public comment opportunities are available for the following applicants.

  • C.A. Lawton - Tier 2
  • InPro World Headquarters - Tier 2
DNR contact
John Stoffel
890 Spruce St
Baldwin. WI 54002
715-684-2914 ext. 121
Cell 715-928-0774
Fax 715-684-5940
Company contact
Lauren Evans
Environmental Health and Safety
580th Street
Menomonie WI 54751
Covia Holdings Corporation [exit DNR]

Covia Holdings Corporation EMS Certified to ISO 14001 Hager City, Maiden Rock and Menomonie
Tier 1 participant since 01/11/2013

Covia Holdings Corporation* strives to exceed sustainable development practices in its operations in Hager City, Maiden Rock and Menomonie, Wisconsin. The facilities specialize in processing high-quality industrial sand products for glass manufacturing, construction, animal bedding and oil and gas exploration.

Environmental activities

The company works closely with DNR to protect local wildlife populations by monitoring bat populations in its mines and collaborating with DNR and local Trout Unlimited chapters to restore nearby trout streams. The company’s EMS and sustainable development teams guide these and future improvements, including water footprint evaluations, alternative energy or energy efficiency projects at all facilities and a goal of zero waste by 2015. Since 2010, the company has:

  • decreased energy consumption by 35 percent;
  • decreased the amount of waste going to landfill by 86 percent; and
  • incorporated upgrades to improve energy efficiency, including a solar array installed at the Menomonie facility that provides enough energy to offset the power used by the office, lab and maintenance shop.


Acceptance letter


*formerly Fairmount Santrol - Wisconsin Industrial Sand Company

Last revised: Wednesday December 04 2019