TD&H Engineering

A Full-Service Consulting Engineering Firm

Website

About the firm

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.

Established
1965
Team
Midsize
Firm type
Aviation Engineering · Civil Engineering · Environmental Engineering · Geotechnical Engineering · Land Surveying · MEP · Materials Testing · Structural Engineering · Transportation Engineering · Water / Wastewater Engineering

Credentials

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

People

Steven MarshP.E., Principal - CEO / President

Rodney BlakeP.E., Principal - Vice President / Regional Manager

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

Kyle ScarrP.E., Principal - Vice President / Regional Manager

Bucky KempaP.E., Principal - Vice President / Engineer - Electrical

Capabilities

Civil Engineering

Service website

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

Service website

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

Service website

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

Service website

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

Service website

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

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

Environmental Engineering

Service website

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

  • Wetland Delineation
  • Regulatory Permitting
  • CERCLA Remediation Work Plans

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

Municipal Engineering

Service website

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

Service website

Airport infrastructure design and engineering services.

MEP Services

Service website

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

  • Mechanical Engineering
  • Electrical Engineering
  • Plumbing Engineering

Funding Procurement

Service website

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

Materials Testing

Service website

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

Projects

Great Falls Water Treatment Plant

Great Falls, MT · Municipal · 2019 · Client: City of Great Falls

Project details

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

Rubenstein Commons, Princeton's Institute for Advanced Study

Princeton, NJ · Higher Education · 2024 · Client: Princeton Institute for Advanced Study

Project details

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.

MedStar Georgetown University Hospital

Washington, DC · Healthcare · 2023 · Client: MedStar Georgetown University Hospital

Project details

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.

Institute for Defense Analysis

Alexandria, VA · Defense & Government · 2023 · Client: Institute for Defense Analysis

Project details

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.

TD&H Engineering - Engineering Firms