This project involved the replacement of the 60-year-old grid deck in the suspended spans, towers, and anchorages of the bridge. Joint leakage, out-of-plane bending, and fatigue led to cracking in the stringers, which must be replaced along with the deck. Two options, an orthotropic deck and a continuous “floating” grid deck, were proposed as the most cost effective solutions, and the orthotropic deck was selected as the option for final design. A wind evaluation, including extensive wind tunnel testing, was undertaken to ensure that the structure would remain stable after the new deck system was installed.

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The project also included the replacement of finger joints, installation of a new fire standpipe, new roadway lighting, and an evaluation of the suspenders.

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CHI performed construction support services on this project, and the work included:

• Responses to RFIs during deck fabrication.

• Shop drawing reviews.

• Staged construction analysis.

• Final design drawings for the main cable inspection and suspender replacement.

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