SEDC Steering Committee

Randy Billinger
Treasurer
Kansas Department of Transportation
2300 Van Buren Street
Topenka, Kansas 66611
voice 785-291-3862
RandyB@ksdot.org

Dan Blankenau
Coranco Great Plains, Inc.
Box 23
Wahoo, Nebraska 68066
voice 402-443-4340
fax 402-443-4177
dblankenau@corancogreatplains.com

Stacy Brocka
Geotech Engineering and Observation
5501 NW 112th St.
Suite C
Grimes, Iowa 50111
voice 515-369-4100
fax 515-369-4101
brocka@geotechengr.com

Scott Cosby
Oklahoma Department of Transportation
Materials Division
Geotechnical Branch
200 Northeast 21st Street
Oklahoma City, Oklahoma 73105
voice 405-522-4995
fax 405-522-0552
scosby@odot.org

Den Dudrey
Wyoming Dept of Transportation
5300 Bishop Blvd.
Cheyenne, Wyoming 82009
voice 307-777-4784
fax 307-777-3994
den.dudrey@dot.state.wy.us

Dale Glenn
Missouri Dept of Transportation
1617 Missouri Blvd.
Jefferson City, Missouri 65109
voice 573-526-4341
fax 573-526-4345
Dale.Glenn@modot.mo.gov

Kevin Griese
Geotechnical Engineering Activity
South Dakota Department of Transportation
700 East Broadway Avenue
Pierre, South Dakota 57501
voice 605-773-3401
fax 605-773-5867
kevin.griese@state.sd.us

Derric Iles
South Dakota Geological Survey
Akeley Science Center
University of South Dakota
414 East Clark Street
Vermillion, South Dakota 57069
voice 605-677-5227
fax 605-677-5895
diles@usd.edu

Scott Helm
Montanna Dept. of Transportation
Geotechnical Section
2701 Prospect Ave. PO
Box 20101
Helena, MT 201001
voice 406-444-6279
shelm@mt.gov

Robert Henthorne
Executive Director
Kansas Department of Transportation
2300 Van Buren Street
Topeka, Kansas 66611
voice 785-291-3860
RobertH@ksdot.org

Ken Luza
Oklahoma Geological Survey
100 East Boyd, Room N-131
Norman, Oklahoma 73019-0628
voice 405-325-3031
fax 405-325-7069
kluza@ou.edu

Matt Marxsen
Secretary
Conservation & Survey Division (Nebraska Geological Survey)
School of Natural Resources, 621 Hardin Hall
Lincoln, NE 68583-0996
voice 402-472-6863
fax 402-472-2946
mmarxsen2@unl.edu

Scott Mounce
HWS, Inc.
825 "J" Street
Lincoln, Nebraska 68505
voice 402-479-2200
fax 402-479-2276
smounce@hws.com

Blake Nelson
1400 Gervais Avenue
Maplewood, Minnesota 55109
651-779-5599
651-779-5510
blake.nelson@dot.state.mn.us

Vincent (Butch) Reidenbach
Oklahoma Department of Transportation
Materials Division
200 Northeast 21st Street
Oklahoma City, Oklahoma 73105
voice 405-522-4998
fax 405-522-0552
vreidenbach@odot.org