Montana Contractors' Registration Unit
Employment Relations Division
Department of Labor and Industry
P.O. Box 8011
Helena, MT 59604-8011
Telephone:  (406) 444-9586
Fax: (406) 444-3465
http://erd.dli.state.mt.us/wcregs/mtcontractor.asp 
E-mail: mconnor@state.mt.us
 

Bureau of Alcohol, Tobacco, Firearms, and Explosives

http://www.atf.gov

Department of the Interior

http://www.doi.gov

Department of Transportation

http://www.dot.gov

Explosives Academy 

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Occupational Safety and Health Administration