116 East Washington, PO Box 316
Fergus Falls, MN 56538-0316               
Phone: 218-739-5545                            
Web: www.interstateeng.com                          
E-mail: chris.mcconn@interstateeng.com                  
Contact: Chris McConn

Branch Office:

1110 3rd Avenue North, PO Box 677
Wahpeton, ND 58074
Phone: 701-642-5521
Contact: Damon DeVillers, P.E.

Services/Products:
Consulting engineers for rural water systems, storage and treatment facilities, wastewater treatment and collection facilities, water resources, GIS mapping, surveying, structural engineering, storm water management, highways, streets, bridges, airports and recreational facilities. Services include planning, design, survey and construction administration and observation. 

Area served: Minnesota, Montana, North and South Dakota.