GAI provided engineering design services for the rehabilitation of historic Senate Avenue over Fall Creek Bridge No. 25271. This 290-ft-long, three-span, reinforced concrete arch structure was built in 1919 and is considered “select” on the Indiana Historic Bridge Inventory. This $4.3 million federally funded rehabilitation project consisted of removing the existing asphalt-wearing surface, arch fill, sidewalks, and bridge railings, as well as the cleaning and patching of unsound concrete on the arch ring, spandrel walls, and piers. New waterproof membrane was placed on the arch ring, and B Borrow was used for arch fill. A new reinforced concrete deck was constructed with concrete sidewalks and new bridge railing accommodated four 10-ft lanes and two 6-ft sidewalks. Riprap was placed at the base of each pier for scour protection.

GAI’s Project Manager provided the City with an innovative design detail to minimize flexural cracks in the deck, which is projected to extend the life of the structure. Combined with other practical design concepts brought forth by GAI, the overall savings in construction cost was over $100,000.