We're a consulting engineering firm offering a full range of services throughout Montana, Washington, Idaho, North Dakota & Pennsylvania.

TD&H 50 year Anniversary Party
Celebrating 50 Years
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Services Designed with You in Mind

  • TD&H Engineering Survey Services


    Licensed surveyors using the latest technology for commercial and residential survey projects

    Learn More about Surveying Services
  • TD&H Engineering Civil Engineering Services

    Civil Engineering

    Creative solutions for structural, transportation, geotechnical & construction management

  • TD&H Engineering Land Development Services

    Land Development

    Site development planning requires an interdisciplinary team approach. We can help!

  • TD&H Engineering Water System Services

    Water Systems

    We design water distribution, storage and treatment solutions for communities and individuals

  • TD&H Engineering Wastewater Services


    Wastewater collection and treatment solutions that are human & environment-friendly

  • TD&H Engineering Structural Development Engineering Services


    Fast, accurate, cost-effective solutions for everything from bridges to buildings

  • TD&H Engineering Geotechnical Services


    You’ll find the leading experts in the geotechnical engineering field right here

  • TD&H Engineering Transportation Services


    Creating safe and efficient transportation designs for roads and bridges since 1965

  • TD&H Engineering Survey Services


    From meandering bike & pedestrian paths to skate parks & wave riders, talk to our experts

  • TD&H Engineering Industrial Engineering Services


    We have been providing quality services to industrial clients since 1965

  • TD&H Engineering Survey Services

    Construction Management

    We ensure a smooth process from pre-bid conferences to inspection and quality control

TD&H Engineering Recent Blog Posts

  • Pedestrian Trail Underway near Sun River

    You may have seen a big crane set up recently on the Sun River off 10th Ave. S. near the Warden Bridge. It’s just one piece of a one million dollar plus construction project for a pedestrian trail which will …

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  • Hire Our Heroes

    Have you heard the “Hire Our Heroes” ad on Goodtime Oldies 92.9 radio station in Great Falls? Take a listen this week on 92.9 FM. We support our troops and veterans. Our Great Falls office recognizes Chris Ward, P.E. (combat …

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  • Employee Spotlight

    Meet Paul Hopkins….Principal Structural Engineer, VP and Regional Office Manager for TD&H’s Media, PA office. He first came across TD&H in 2007 while searching for a structural engineering firm in Lewiston, ID when he and his family were moving from …

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