Current Steering Committee
Randy Billinger P.G.
Stacy G. Brocka, P.E.
Allender Butzke Engineers Inc. 3660 109th Street Urbandale, IA 50322
Oklahoma Department of Transportation Materials & Research Division Geotechnical Branch 200 Northeast 21st Street Oklahoma City, OK 73105
Elisabeth DeCoursey SEDC Treasurer
President Kansas City Testing & Engineering, LLC 1141 Southwest Blvd. Kansas City, KS 66103
Missouri Department of Transportation Geotechnical Section 1617 Missouri Blvd. Jefferson City, MO 65109
South Dakota Department of Transportation Geotechnical Engineering Activity 700 East Broadway Avenue Pierre, SD 57501
Coranco Great Plains Inc. Box 23 Wahoo, NE 686066
Kyle Halverson, P.G. SEDC Secretary
Professional Geologist II Kansas Department of Transportation Bureau of Structures and Geotechnical Services Topeka, KS
South Dakota Geological Survey Akeley Science Center University of South Dakota 414 East Clark Street Vermillion, SD 57069
Central Mine Equipment 4215 Rider Trail North Earth City, MO 63045-1106
Matt Marxsen SEDC Executive Director
Field Service Coordinator Conservation and Survey Division (Nebraska Geological Survey) School of Natural Resources 621 Hardin Hall Lincoln, NE 68583-0996
Terracon 15080 A Circle Omaha, NE 68144
Supervisor | Field Investigation Unit Montana Department of Transportation 2701 Prospect Ave. Helena, MT. 59620
1400 Gervais Avenue Maplewood, MN 55109
Vincent (Butch) Reidenbach, Ph.D., P.E.
Geotechnical Engineering Consultant, Agricultural Engineering Consultant, Oil Field Services Consultant 15601 Claremont Blvd Edmond, OK 73013
Soils & Geotechnical Program Colorado Department of Transportation 4670 Holly Street, Unit A Denver, CO 80216
Wyoming Department of Transportation 5300 Bishop Blvd. Cheyenne, WY 82009