
406 Engineering Inc
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Work Hard | Work Smart | Enjoy Life
Civil and Structural Engineers Montana
Your Partner for Efficient and Effective Design
Empowering People. Enhancing Lives.
APEC Engineering, Inc. is an innovative, locally owned and operated civil engineering firm licensed in Montana and serving northwest Montana since 1998. Headquartered in Somers, Montana, APEC's team of highly qualified professionals provides civil engineering services including water resources, land development, environmental permitting, planning, and construction engineering to clients across Montana and North Dakota. APEC Engineering is committed to efficient design, modern capabilities, and hands-on consulting, serving communities in Kalispell, Bigfork, Whitefish, Columbia Falls, and throughout the region.

Build On Our Experience
Diverse Projects. Solutions That Last.
Delivering Personalized Surveying & Engineering Solutions
Altitude Engineering is a structural engineering firm located in the Bitterroot Valley, just south of Missoula, Montana. Altitude Engineering specializes in steel and aluminum structures and provides economical designs using precast and cast-in-place concrete, masonry, timber, and log framing. Altitude Engineering holds professional engineering registrations in thirteen states: Montana, Colorado, Wyoming, Idaho, Nevada, Alaska, Washington, Utah, Oregon, Arizona, Arkansas, Vermont, and Oklahoma. Representative project experience includes waterpark enclosure structures, aviation hangars, industrial crane pedestals, hospital expansions, and commercial facilities.

Arrow Creek Survey Co. is a privately owned professional land surveying firm serving clients throughout Montana from offices in Geyser and Lewistown. Formerly operating as Lindseth Survey Co., Arrow Creek expanded by acquiring Milestone Surveying and now draws on more than forty years of historical survey records. Jeremy T. Milburn, PLS, leads the practice with over 25 years of surveying experience spanning projects in Montana, Alaska, Minnesota, and Russia. The team uses advanced Trimble GPS equipment, total stations, and CAD to deliver accurate results for residential, commercial, agricultural, and conservation clients.

Transforming Communities Since 1987

Dream Bigger, Build Better

Dedicated to Conserving Energy and other Natural Resources

Acoustical Design and Noise Control
Engineering Solutions for Complex Projects

Game Changers. Future Chasers.
Bridger Engineers is a diversified civil and structural engineering firm based in Bozeman, Montana, founded in 1995 by Ed Matos and Brad Ebel. It serves clients throughout the Rocky Mountain region and beyond, with more than 60% of workload coming from repeat clients. Bridger provides structural engineering including historic restoration, rehabilitation, seismic mitigation, and forensic services, alongside civil engineering for land development projects including commercial sites, residential subdivisions, and ranch compounds in southwestern Montana.
Civil Engineering and Surveying across the Dakotas and Montana
CFR Engineering Consultants, Inc. is a Maryland-based MEP engineering firm providing mechanical, electrical, plumbing, and fire protection engineering design and construction administration services. It serves federal agencies including NIH, NIST, NAVFAC, USACE, and USGS, with a strong portfolio in laboratory, cleanroom, and healthcare facility projects. CFR acts as Engineer of Record and prime consultant on complex renovation and fit-out projects ranging from BSL-2 research laboratories to pharmaceutical GMP spaces and hospital clinical facilities.

Engineering consultants and field technicians providing geotechnical, structural, materials, and environmental solutions.

Consulting civil engineering services with a meticulous commitment to detail

Collaborative network of forensic and practicing senior engineers

The Right Team Matters

Coldwater Engineering is a Helena, Montana-based civil engineering practice specializing in hydrology and hydraulics, railroad engineering, environmental permitting, and survey. Founded around railroad infrastructure, it has completed nearly a thousand Class I railroad projects across 23 states, with long-term master services agreements with Union Pacific Railroad and Kansas City Southern. Core capabilities include bridge opening analysis, scour analysis and countermeasure design, floodplain permitting, streambank stabilization, and wetland delineation.