H&H is currently leading a team for the rehabilitation design of the drawbridge located in Wilmington, Delaware. The goal of the project is to extend the life of each bridge by 30 years, improve reliable movable bridge operations, remove the load postings at each bridge, reduce future maintenance costs, and improve bridge access for inspection and maintenance personnel.
H&H performed the design-level inspection of all three bridges to assess the structural, mechanical, and electrical systems, guardrail assessment, and ADA compliance to identify the repair scope to be included in a comprehensive rehabilitation project. H&H completed the survey plan and concept plan submissions for the rehabilitation design. H&H also completed the load rating analysis to determine the structural repairs needed at the approach spans and bascule spans.
H&H developed work packages for each bridge for priority repairs to be completed ahead of the rehabilitation construction. These repairs were identified from the design level inspection and included electrical system auxiliary drive repairs, stringer repairs, warning gate replacement design, and maintenance access repairs.
This project is currently in the concept plan stage.