HAFFERMAN ENGINEERING, INC.
(Montana (US), 3610 MONTANA HIGHWAY 37
LIBBY, MT 59923)
Previously/Alternatively known as MARQUARDT AND BILLMAYER INCORPORATED
branchHDR ENGINEERING, INC.
(Montana (US), 1917 S. 67TH STREET
OMAHA, NE 68106)
Previously/Alternatively known as HDR INFRASTRUCTURE INCORPORATED
branchTERRACON CONSULTANTS, INC.
(Montana (US), 2110 Overland Ave., Suite 124
Billings, MT 59102)
Previously/Alternatively known as NTL ENGINEERING AND GEOSCIENCE INCORPORATED
branchTETRA TECH, INC.
(Montana (US), 3475 E. FOOTHILL BLVD
PASADENA, CA 91107)
WEST ELECTRIC, INC.
(Montana (US), 1310 MT HWY 91 NORTH
Dillon, MT 59725)
Previously/Alternatively known as R AND R WEST HEATING AND ELECTRIC INCORPORATED
branchWESTERN WATER CONSULTANTS, INC.
(Montana (US), 611 SKYLINE RD
LARAMIE, WY 82070-8909)
Previously/Alternatively known as NORTHERN ROCKIES ENGINEERING INCORPORATED
WGM GROUP, INC.
(Montana (US), 1111 E BROADWAY
MISSOULA, MT 59802)