Time Monday, November 3, 2025
 
         
         
 
Interstate Engineering Inc

Physical Address
1211 Grand Ste 6
Billings, MT 59102

Phone 1: (406) 256-1920
Phone 2:
800 #: None Listed
Fax: (406) 256-1978
Company E-mail: None Listed
Web Site:  www.interstateeng.com
Year Established:
Labor Affiliation:


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Spokane Regional Plan Center

209 N Havana   -   Spokane Wa 99202   -   Ph: 509.328.9600   -   Email: projectinfo@plancenter.net

Open Monday thru Friday - 8:00 AM to 4:00 PM