CONTACTS

 

Sioux City

Construction Material Testing
Jack Krage 

419 West 6th Street
PO Box 1193
Sioux City, IA 51102

(712) 252-5132   v
(712) 252-0110   f


ctsinc@cableone.net

 

Geotechnical Engineering
Jim Bertsch

419 West 6th Street
PO Box 1193
Sioux City, IA 51102

(712) 252-5132   v
(712) 252-0110   f


jimbertsch@cableone.net

Storm Lake

Gary Jackson 

1330 North Michigan Street
PO Box 740
Storm Lake, IA 50588

(712) 213-8378   v
(712) 213-8201   f
(712) 299-8006   c

grjackson@iw.net 

 

 

 

 

 

 

 

 

 

 

 

 
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