Mountain West Holding Company has quickly become Montana's leading oversize load coordination contractor. We are able to assist in every phase of over-the-road transport from route development to flagging to overnight staging and security. Recent projects include:

  • Kearl Oil Sands Project - Exxon Mobil Canada
    • Provided traffic control logistics for 350+ loads over the course of two years. Loads originated in Port of Pasco, WA and Port of Lewiston, ID and were delivered to Sweet Grass, MT at the Canadian border. 


Through our statewide branches, Mountain West Holding Company is readily able to supply your project with traffic control regardless of scope or size. We employ ATSSA certified supervisors and flaggers that arrive on site fully equipped with all the knowledge and traffic control devices required for safe, efficient work zones. We also design and draft traffic control plans that meet or exceed project requirements. MWHC provides professional plans in a timely manner to ensure your project stays on schedule. We provide the rental, sale and installation of temporary and permanent traffic control devices and equipment for your next project or event. Recent projects include:

  • Deep Creek Improvements - Montana DOT
    • 9.4 mile bridge replacement, rock blasting, and road realigment consisting of three days highway closure and detour and multiple work zones.
  • Gardiner Gateway, Phase 1 - FHWA
    • Access enhancement to Yellowstone National Park that heavily relies on pedestrian and vehicular accomoddations during construction.
  • D3 Rockfall Mitigation, Phase 1 - Montana DOT
    • Rockfall mitigation project on Interstate 15 consisting of multiple crossovers, wide load accommodations and intermittent traffic stops.


We pride ourselves in offering a wide selection of permanent installation items for any road construction project. Mountain West Holding Company specializes in guardrail installation, concrete barrier rail manufacture and installation, delineation, and signing. Our highly trained and experienced installation crews ensure the job will meet all federal, state, and local specifications. Whether your needs are street, highway, parking lot, subdivision development, airport, public or private, MWHC is the best choice for permanent traffic safety installations. Recent projects include:

  • Custer to Hysham - Montana DOT
    • Manufactured and installed 2,800 pieces of concrete barrier rail
  • Elk Park to Bernice - Montana DOT
    • Removed 35,000 feet of used guardrail. Installed 34,000 feet of new w-beam guardrail and 27 new end terminals 
  • Butte Horizontal Curve Signing - Montana DOT
    • Installed 900+ curve warning signs on several interstate and secondary highways across SW Montana