DHA offers a full range of services tailored to bridge projects. The staff at DHA has extensive experience with bridge projects, with over 100 years of combined bridge planning and design experience among the principal engineers. Their expertise has been gained through a variety of projects on local and state highways. The engineering staff at DHA can provide bridge design and associated project engineering and management for any phase of the project, from planning to development of the plans, specifications and estimate, to construction support and management. DHA provides the following design services:

• Final design, plans, specifications and estimates (PS&E)

• Advance planning and feasibility studies

• Railroad grade separations

• Earth retaining structures

• Seismic retrofitting

• Strengthening and rehabilitation

• Load rating and value analysis

• Structure inspection/assessment