Roberta Walls
La Crosse, WI
Activity
2015
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OVERVIEW OF WISCONSIN DEPARTMENT OF NATURAL RESOURCES PERMITTING AND COMPLIANCE AUTHORITIES FOR INDUSTRIAL SAND OPERATIONS
14 Frac Sand in the Midwest: Geology, Mining, Reclamation, and Environmental Issues IITuesday, 19 May 20151:30 PM - 5:30 PMHall of Ideas J