The Macombs Dam Bridge is among the oldest, most ornate, and important truss bridges in New York City. The bridge is a massive swing bridge with a substantial approach system consisting of various span sizes and types.

The first bridge at the site was constructed in 1814 as a true dam called Macombs Dam. Because of complaints about the dam's impact on the Harlem River's navigability, the dam was demolished in 1858 and replaced three years later with a wooden swing bridge called the Central Bridge, which required frequent maintenance. The current steel span was built between 1892 and 1895, while the 155th Street Viaduct was built from 1890 to 1893; both were designed by Alfred Pancoast Boller. The Macombs Dam Bridge is the third-oldest major bridge still operating in New York City, and along with the 155th Street Viaduct, was designated a New York City Landmark in 1992.

The bridge has been preserved through various rehabilitation projects and inspections which keeps the bridge in good condition. Historic integrity on the bridge is fair given the heavy traffic and age of the bridge. Numerous rivets have been replaced with bolts, and supplemental members have been added. However, in contrast key details have left in place including original gates and railings.

As the QA/QC Lead Radhi Majmudar reviewed the inspection report that flagged the conditions of the expansion joints of the Macombs Dam Bridge Viaduct on 155th Street in Harlem. These inspections were performed in accordance with the NYSDOT Requirements which includes the NYS Bridge Inspection Manual Appendix A and the Uniform