DNR Staff Directory
Name: Roberta A Walls
Email Address: Roberta.Walls@Wisconsin.gov
Working Title: Environmental Assistance Coordinator
Supervisor: Laurel Sukup
Org. Chart: Division of External Services > Bureau of Environmental Analysis & Sustainability > Sustainability & Business Support
Division Administrator: Joe Liebau Jr.
Primary Phone:
(608) 785-9272

Secondary Phone:

(608) 785-9990
Work Station:
Work Address:
3550 Mormon Coulee Road
La Crosse, WI 54601
Work Mailing Address:
3550 Mormon Coulee Road
La Crosse, WI 54601
Assigned Subjects
SubjectCounties Served
Frac Sand (Industrial Sand Mining) - Agency SpokespersonStatewide
Green Tier Project Coordinator, Badger Mining CorporationStatewide
Green Tier Project Coordinator, Fairmount Santrol - Wisconsin Industrial Sand CompanyStatewide
Green Tier Project Coordinator, Smart Sand – Oakdale PlantStatewide
Green Tier Project Coordinator, Unimin Corporation, Portage Facility, Tunnel City FacilityStatewide
Green Tier Project Coordinator, US Silicia Company Sparta PlantStatewide
U.S. Silica – Sparta Plant Green Tier Single Point of ContactMonroe
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