WSP - Complex Bridges / Arch & Cable-Supported

WSP Suspension Bridge Dehumidification Roles

Bridge

Owner’s Engineer Contractor’s Engineer

Extended

Main Cable/ Anchorage

Timeframe

Maintenance & Monitoring

Operation &

Construction

Maintenance

Management

Contract Type

Chesapeake Bay Bridges (2)

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2012 - 2015 MC & Anch Design/Build

George Washington

Design-Bid Build

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2012 - Present MC & Anch

Delaware Memorial Bridges (2) South 10th Street

A&W - Contractor WSP - Owner

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2016 - 2018 Main Cable Design/Build

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2017 - 2019 MC & Anch Design/Build

Anthony Wayne Bridge

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2019 - 2021 MC & Anch Design/Build

Walt Whitman Bridge

Design-Bid Build

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2020 - Present MC & Anch

Robert F. Kennedy Bridge 2021 - 2023 MC & Anch Design/Build

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√

Macdonald Bridge (Halifax)

Design-Bid Build

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2023 - Present MC & Anch

EXPERIENCE IN MAIN CABLE DEHUMIDIFICATION Over the past 12 years, main cable dehumidification systems have been installed on select suspension bridges across North America. As part of WSP’s cable preservation services, our team of experts has continually worked on cable dehumidification projects over the past 12 years. As the only engineering firm with experience as both Owner’s Engineer and Contractor’s Engineer, we have a unique perspective on the level of detail associated with the development of multi disciplinary dehumidification systems. The performance of these systems in achieving the desired objective of maintaining relative humidity (RH) readings of less than 40% at exhaust locations lacks consistency. As there is presently no code governing the application of dehumidification systems, WSP has compiled observations through involvement in the design, installation, operation, and maintenance of 10 suspension bridge main cable dehumidification systems. By comparing performance across systems at different bridges, considering variables such as air flow resistance in cables, the performance of Dehumidification Plant Equipment (DPE), and performance of Control and Monitoring Systems (CMS), our engineers have developed improvements in the application of cable dehumidification technologies, including retrofits to existing systems.

Complex Bridges / Arch and Cable-Supported

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