Headquarters
1200 17th Street
Tabor Center, Suite 1100
Denver, Colorado 80202
Phone: (303) 595-8004
Fax: (303) 595-9847
Field Office
820 42nd Street West
Williston, ND 58801
Phone: (701) 557-3543
Office Hours: Tuesday through Thursday
10:00 am to 3:00 pm