TD&H Engineering

Great Falls, MT

A Full-Service Consulting Engineering Firm

Services: 39
Offices: 9
Projects: 8
Leaders: 5
Founded: 1965
Size Estimate: 50-150 employees

Overview

TD&H Engineering (Thomas Dean & Hoskins, Inc.) is a full-service consulting engineering firm incorporated in 1965 and headquartered in Great Falls, MT. It delivers civil, structural, environmental, geotechnical, transportation, water/wastewater, and MEP engineering services across Idaho, Montana, North Dakota, Pennsylvania, and Washington. With nine offices and a broad portfolio spanning municipal infrastructure, precast structural design, aviation, and industrial projects, TD&H serves clients ranging from small unincorporated communities to large cities and corporations.

Founded: 1965
Size Estimate: 50-150 employees

Services

Civil Engineering

Comprehensive civil design including site grading, utility infrastructure, storm analysis, water modeling, and residential/commercial land development.

Site Civil Grading & Utility Infrastructure Stormwater Analysis & Drainage Design Land & Site Development Construction Administration

Structural Engineering

Structural design for buildings, bridges, precast concrete, industrial structures, and foundations across a wide range of project types and geographies.

Precast Concrete Design Bridge Engineering Building Structural Design Foundation Design

Water, Wastewater & Stormwater Systems

Design and engineering for municipal water distribution, wastewater collection and treatment, forcemain crossings, and stormwater systems.

Water Distribution System Design Wastewater System Design Water Treatment Plant Design Forcemain & River Crossings

Geotechnical Engineering

Foundation investigations, slope stability analysis, soils testing, and geotechnical reporting for civil and structural projects.

Foundation Investigations Slope Stability Analysis Soils Testing & Analysis

Transportation Engineering

Roadway design, streetscape improvements, sidewalk upgrades, traffic studies, and sports facility site design.

Roadway & Street Design Curb, Gutter & Sidewalk Design Traffic Studies

Environmental Engineering

Environmental permitting, wetland delineations, CERCLA remediation work plans, regulatory permit acquisition, and environmental documentation.

Wetland Delineation Regulatory Permitting CERCLA Remediation Work Plans

Surveying

Land and topographic surveying, right-of-way surveys, and construction layout across all office regions.

Municipal Engineering

Comprehensive engineering services for municipalities including master planning, capital improvement programs, development review, and utility system evaluations.

Master Planning System Evaluations Development Reviews

Aviation Engineering

Airport infrastructure design and engineering services.

MEP Services

Mechanical, electrical, and plumbing engineering services acquired through GPD Consulting Engineers.

Mechanical Engineering Electrical Engineering Plumbing Engineering

Funding Procurement

Grant writing and funding procurement assistance to help municipal clients secure project financing.

Materials Testing

Construction materials testing and inspection services.

Industries

Government Wastewater Water Supply Highways & Roads Transportation Healthcare Education Defense Industrial Aviation Public Safety Parks & Open Space Sports & Recreation

Firm type

Aviation Engineering Civil Engineering Environmental Engineering Geotechnical Engineering Land Surveying MEP Materials Testing Structural Engineering Transportation Engineering Water / Wastewater Engineering

Project types

Water Treatment Plants Precast Concrete Buildings Medical & Surgical Facilities University & Higher Education Buildings Bridges & Culverts Fish Passage Structures Roadway & Streetscape Improvements Municipal Water Main Crossings Forcemain River Crossings Sports Stadiums & Athletic Facilities Fire Stations Industrial Warehouses Airport Infrastructure Defense Facilities

Projects

Great Falls Water Treatment Plant

2019 | Great Falls, MT | City of Great Falls | Municipal

Water treatment plant design that won the ACEC Montana Grand Project Award.

Civil Engineering Water, Wastewater & Stormwater Systems

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Rubenstein Commons, Princeton's Institute for Advanced Study

2024 | Princeton, NJ | Princeton Institute for Advanced Study | Higher Education

Exterior structure composed of 60 unique 10-11 inch thick precast concrete panels, 10 curved, all with sandblast finish. Won 2024 PCI Design Award: Best Higher Education/University Building.

Structural Engineering Precast Concrete Design

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MedStar Georgetown University Hospital

2023 | Washington, DC | MedStar Georgetown University Hospital | Healthcare

New six-story medical building and surgical pavilion, cast-in-place concrete structure with elevated slabs supporting 860 exterior precast concrete architectural cladding panels. Won 2023 APA Award for Excellence.

Structural Engineering Precast Concrete Design

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Institute for Defense Analysis

2023 | Alexandria, VA | Institute for Defense Analysis | Defense & Government

New eight-story office building, cast-in-place concrete structure with elevated slabs supporting precast concrete architectural cladding panels. Won 2023 APA Award for Excellence.

Structural Engineering Precast Concrete Design

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Peasley Creek Fish Passage Bridge

ID | U.S. Forest Service / Nez Perce Tribe | Municipal

Replaced an existing box culvert with a larger-span pipe arch to improve fish passage, constructed during the fish window. Jointly funded by U.S. Forest Service and the Nez Perce Tribe.

Civil Engineering Structural Engineering

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City of Leavenworth Commercial Street Improvements

Leavenworth, WA | City of Leavenworth | Municipal

Transportation design widening roadway to 20 ft, adding curb, gutter, 6-foot concrete sidewalk, and improved stormwater drainage.

Transportation Engineering Civil Engineering

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Missouri River Forcemain Crossing Feasibility Study

MT | Municipal

Water, Wastewater & Stormwater Systems Civil Engineering

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Van Winkle Stadium & Lambert Fields

Bozeman, MT | Montana State University | Higher Education

Design, traffic study update, and construction administration for stadium upgrades and new field complex at Montana State University.

Civil Engineering Transportation Engineering Construction Administration

View project source

Credentials and affiliations

Certifications

Licensed in multiple states (MT, ID, WA, ND, PA and others)

Awards

ACEC Montana Grand Project Award Winner - Great Falls Water Treatment Plant (2019)PCI Design Award: Best Higher Education/University Building - Rubenstein Commons, Princeton (2024)APA Award for Excellence: Design and Manufacturing - MedStar Georgetown University Hospital (2023)APA Award for Excellence: Design and Manufacturing - Institute for Defense Analysis, Alexandria VA (2023)

Leadership

Steven Marsh

P.E., Principal - CEO / President

Located at the Spokane office. 29 years of experience in environmental and municipal permitting, residential/commercial/industrial land development, water and wastewater system design, urban street and county roadway design, and construction administration.

Rodney Blake

P.E., Principal - Vice President / Regional Manager

Structural engineer licensed in MT, ND, WY, VT, ID, and several Canadian provinces. Structural Department Manager since 1999. Experience with bridges, roofs, tanks, foundations, and buildings.

Paul Hopkins

PhD, P.E., S.E., Principal - Vice President / Regional Manager

Regional Manager of the Media, PA office. Licensed structural engineer in over 30 states with expertise in precast concrete, power/industrial structures, healthcare and higher education facilities, and seismic/wind/snow design. Adjunct professor at Widener University since 2014.

Kyle Scarr

P.E., Principal - Vice President / Regional Manager

Bozeman Regional Manager. Civil/geotechnical engineer specializing in foundation investigations, slope stability, and land development. M.S. in civil engineering with geotechnical emphasis from Montana State University. With TD&H since 2005.

Bucky Kempa

P.E., Principal - Vice President / Engineer - Electrical

Licensed electrical engineer with expertise in power distribution, lighting, IT infrastructure, security/alarm systems, medical/laboratory, industrial, data center, and higher education projects. LEED AP, NCEES Certified.