Projects Environmental

Lexington Avenue Bridge Rehabilitation over St. Joseph River

Elkhart, Indiana

The Lexington Avenue Bridge over the St. Joseph River is a three-span (85′-6″, 85′-6″, 85′-6″) earth-filled concrete arch constructed in 1926.  DLZ was selected to provide topographic and stream survey and engineering services for the rehabilitation of this bridge. This project included new approaches, bridge deck, railings, lights, storm sewers, and improved realignment of North Riverside Drive.

Due to the historic significance of this structure, DLZ prepared the documentation for the Categorical Exclusion and Programmatic Section 4(f), Section 106, and a Memorandum of Agreement between federal, state and local agencies. In these documents, DLZ proposed to increase the safety of the structure while preserving the historic nature of the area.

In order to accomplish this the new concrete railings were constructed to resemble the details of the original railing while utilizing the reinforcement details of the crash-tested Texas-T concrete railing.  Form liners were used on the concrete railings to replicate the bush-hammered effects in recessed areas of the original railings and the new lights were fabricated to resemble those of the original structure.

The rehabilitation of the structure also specified that all spalled and cracked areas of the arch and spandrel walls be repaired by removing and repointing the deteriorated concrete and epoxy injecting the existing cracks. After the repairs were made a masonry coating was applied to give the structure a uniform appearance.