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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
Roberta Walls
3550 Mormon Coulee Rd
La Crosse WI 54601
Fax 608-785-9990
Company contact
David Olchawa
Senior Manager, Environmental Programs
701 Boyce Memorial Drive
Ottawa IL 61350
U.S. Silica - Sparta Plant [exit DNR]

U.S. Silica Company - Sparta Plant Functionally Equivalent to ISO 14001 Tier 1 participant since 07/31/2013

U.S. Silica Company's Sparta Plant was under construction for much of 2012 and is scheduled to begin sand mining and processing operations in the second quarter of 2013. The Sparta Plant represents the fourteenth active sand processing facility currently in operation at U.S. Silica.

Environmental activities

U.S. Silica’s Sparta plant mines sand through a process called dredging. The sand is extracted from the ground with water without the use of any chemicals. The sand is then transported as slurry via pipeline to the processing facility where it is sorted and dried in a no-emissions manner – with vibratory screens that use gravity and clean-burning natural gas dryers. It is then loaded onto rail or packaged for delivery to the customers. Sustainability is also key in operations at the Sparta Plant, which has taken steps such as:

  • training employees in environmental awareness and employing a full-time environmental health and safety coordinator;
  • constructing and seeding visibility berms around the site and planting trees and vegetation as visual buffers; and
  • installing silt fences to control stormwater pollution, which also serve to protect local wildlife like wood turtles.


Acceptance letter


Last revised: Thursday December 05 2019