Steering Committee
Randy Billinger P.G.
Stacy G. Brocka, P.E.
Allender Butzke Engineers Inc.3660 109th StreetUrbandale, IA 50322
Chris Clarke
Oklahoma Department of TransportationMaterials & Research DivisionGeotechnical Branch200 Northeast 21st StreetOklahoma City, OK 73105
Elisabeth DeCourseySEDC Treasurer
PresidentKansas City Testing & Engineering, LLC1141 Southwest Blvd.Kansas City, KS 66103
Ken Farrow
Missouri Department of Transportation Geotechnical Section1617 Missouri Blvd.Jefferson City, MO 65109
Kevin Griese
South Dakota Department of TransportationGeotechnical Engineering Activity700 East Broadway AvenuePierre, SD 57501
Rich Hahler
Coranco Great Plains Inc.Box 23Wahoo, NE 686066
Kyle Halverson, P.G.SEDC Secretary
Professional Geologist IIKansas Department of TransportationBureau of Structures and Geotechnical ServicesTopeka, KS
Scott Jensen
South Dakota Geological SurveyAkeley Science CenterUniversity of South Dakota414 East Clark StreetVermillion, SD 57069
Brad Jouppi
Central Mine Equipment4215 Rider Trail NorthEarth City, MO 63045-1106
Matt MarxsenSEDC Executive Director
Field Service CoordinatorConservation and Survey Division(Nebraska Geological Survey)School of Natural Resources621 Hardin HallLincoln, NE 68583-0996
Dave Mather
Terracon15080 A CircleOmaha, NE 68144
Jonathan Neace
Supervisor | Field Investigation UnitMontana Department of Transportation2701 Prospect Ave.Helena, MT. 59620
Blake Nelson
1400 Gervais AvenueMaplewood, MN 55109
Vincent (Butch) Reidenbach, Ph.D., P.E.
Geotechnical Engineering Consultant,Agricultural Engineering Consultant,Oil Field Services Consultant15601 Claremont BlvdEdmond, OK 73013
David Thomas
Soils & Geotechnical ProgramColorado Department of Transportation4670 Holly Street, Unit ADenver, CO 80216
Craig Walker
Wyoming Department of Transportation5300 Bishop Blvd.Cheyenne, WY 82009