1. US Army Corps of Engineers
597 Garrison Dam Rd, Riverdale, ND 58565
Coordinate: 47.497787,-101.176094
Phone: (701) 654-7441
2. US Army Corps of Engineers
201 1st St, Riverdale, ND 58565
Coordinate: 47.49967,-101.37434
Phone: (701) 654-7411