TD&H Engineering

Specialties

Transportation Design

Water and Wastewater Engineering

Grant Writing and Administration

Civil Engineering

Structural Engineering

Environmental Engineering

Geotechnical Engineering

Surveying

Construction Management and Inspection

Public Involvement

History

Established in 1965.

Thomas Dean & Hoskins, Inc. (TD&H) is a consulting engineering firm offering a range of services throughout Montana, Washington, Idaho, North Dakota and Pennsylvania. We serve a diverse clientele ranging from individuals and rural water districts to large corporations in populous cities. We assist our clients through all phases of their projects, starting with concept development through construction completion. TD&H has been satisfying clients since its incorporation in 1965 and has built an impressive resume of successful projects.

TD&H strives to provide innovative engineering solutions to challenging technical problems by assigning professionals who understand the issues and deliver results. We place a high priority on service and measure our success in terms of each client’s success.

Meet the Manager

David W.

Manager

David was hired in 1993 to open the TD&H Lewiston office and has been in the Lewis-​Clark valley since 1994. He is a firm Principal and a Senior Transportation Engineer, overseeing roadway and highway design projects and all regulatory compliance issues typically associated with federal-​aid work. David excels in assisting clients with Public Involvement programs that foster positive community and stakeholder input, leading toward successful completion. He has a B.S. in Civil Engineering from Walla Walla University.