1. Houston Engineering Inc 3712 Lockport St, Bismarck, ND 58503 Coordinate: 46.84599,-100.77532 Phone: (701) 237-1382
2. Swenson Hagen & Company 909 Basin Ave, Bismarck, ND 58504 Coordinate: 46.78718,-100.77809 Phone: (701) 223-2600