Portsmouth Memorial Bridge
Services Applied by VCS Engineering
Project Description
As part of the rehabilitation of the Portsmouth Memorial Bridge, VCS Engineering evaluated corrosion risks associated with new micro-piles supporting the historic piers. The team developed a cathodic protection approach to help ensure the long-term durability of the foundation elements as the bridge underwent a major restoration.
Project Issue
As part of the Portsmouth Memorial Bridge renovation, steel threadbar micro-piles were installed to strengthen the historic concrete piers. During construction, engineers recognized the potential for the piles to be exposed to the marine environment, which could accelerate corrosion and reduce long-term durability. Addressing this risk became an important part of the rehabilitation strategy.
Project Solution
VCS supported the rehabilitation of the bridge foundations by assessing corrosion conditions and recommending a long-term protection approach. As part of the evaluation, industry-recognized testing methods, including corrosion potential mapping and polarization testing, were used to understand the exposure risks facing the micro-piles. Based on these findings, a galvanic cathodic protection system was designed and installed to help safeguard the piles against deterioration in the marine environment. Oversight was provided during installation to help ensure quality, and monitoring stations were incorporated so that the owner can track system performance and plan for future maintenance.