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1. Albertville
    Map & Directions
    Contact: Doug Trangsrud
    (763) 428-5573

4. Mankato
    Map & Directions
    Contact: Greg Guyer, PE
    (507) 387-2222

7. St. Paul (Headquarters)
    Map & Directions
    Contact
    (651) 659-9001

10. Beresford
      Map & Directions
      Contact: John Doorn
      (605) 763-8061

13. Sioux Falls
      Map & Directions
      Contact: Bruce Card, PE
      (605) 332-5371

16. Menomonie
      Map & Directions
      Contact: Ray Martinson
      (715) 235-8844

NDT Field Offices:

Eau Claire, WI
Gary, IN

Palatka, FL

Contact: Dave Fitterer

2. Duluth
    Map & Directions
    
Contact: Eric Edlund
    (218) 628-1518

5. Marshall
    Map & Directions
    Contact: Tom James
    (507) 532-0771

8. Dickinson
    Map & Directions
    Contact: Al Hovick
    (701) 483-4288

11. Pierre
      Map & Directions
      Contact: Doug Schueller
      (605) 224-9535

14. Chippewa Falls
      Map & Directions
      Contact: Joel Guanella
      (715) 861-5045

17. Wausau/Schofield
      Map & Directions
      Contact: Greg Owens, PG
      (715) 359-3534

3. International Falls
    Map & Directions
    Contact: Joe Kendzora
    (218) 283-2958

6. Rochester
    Map & Directions
    
Contact: Kyle Shubert, PE
    (507) 281-3547

9. Williston
    Map & Directions
    Contact: Walter Slack, PE
    (701) 774-6610

12. Rapid City
      Map & Directions
      Contact: Robert Temme, PE
      (605) 388-0029

15. Green Bay
      Map & Directions
      Contact: Andy Walters, PE
      (920) 347-1286

18. Sheridan
      Map & Directions
      
Contact: Todd Ordahl, PG
      (307) 675-1862