Your Bridge to Safety & Quality

The design-build team of Ayres and American Bridge designed and constructed this pedestrian bridge to carry the Cross Seminole Trail over US 17-92 at General Hutchison Road. A unique reverse S-shaped structure was designed to maintain the curved nature of the trail. The complex design required review and approval by the Florida Department of Transportation’s Central Office.

Ayres performed a structural evaluation and prepared conceptual repair details for the County M bridge over the Holcombe Flowage. Steel gusset plates on the truss bridge have distortions at several locations, prompting the analysis. The historic six-span Warren pony truss structure was constructed in 1950.

Having designed the conversion of the 1881 bridge to pedestrian use in 2015, Ayres sprang into action when deterioration of one of the bridge’s piers left the signature bridge’s future in doubt in 2021.The 898-foot-long bridge includes two 80-foot double intersection Warren deck trusses at the approaches and four 180-foot main spans that are believed to be the only quintuple intersection lattice deck trusses in the nation.

Ayres designed the reconstruction of the US 53/WIS 35 interchange with I-90, along with reconditioning 2.4 miles of I-90 and improvements for 13 bridges along the segment. The project required a breadth of transportation engineering expertise to create a welcoming interstate gateway in an environmentally sensitive area. The interchange design also resulted in three fewer bridges than its predecessor, reducing maintenance costs.

Ayres designed the replacement of the historic West 6th Street Bridge over the Root River and Horlick Drive. The project was about connecting the City to its past as well as improving physical connections over and along the river. Our team added faux arches to the new concrete bridge’s design to replicate the historic bridge’s lines, and we matched the old bridge’s mosaic tile and gargoyle colors to feature in the new bridge.

Ayres, which previously provided design services for construction of this bridge in 1984, designed its rehabilitation, including inspection and adjustment/repair of each supporting cable in the 500-foot-long steel tied arch center span. Load ratings confirmed bridge could handle load of concrete overlay.

As part of a continuing contract to provide structural engineering services to St. Johns County, Ayres worked under multiple task orders to provide emergency post-hurricane inspections, a Wildwood Drive culvert collapse emergency inspection, and other emergency inspections of pedestrian and roadway bridges and piers. Pictured here is a post-hurricane inspection at the St. Johns County Ocean Pier at St. Augustine.

Working as a prime or subconsultant on seven cycles of inspections since 1998, Ayres provides primary inspection teams and condition assessment for the I-275 Bob Graham Sunshine Skyway Bridge. Services include inspections of the signature bridge over Tampa Bay, including 24/7 emergency assistance for the 21,877-foot-long, cable-stayed concrete segmental box girder bridge with external and internal post-tensioning.

Ayres has provided bridge inspections for the City of Green Bay each year since 2021, including routine inspections, scour plans of action, and inspection of the Ray Nitschke Memorial Bridge, a twin-leaf bascule bridge over the Fox River.

Since 2013 Ayres has provided inspections of approximately 500 toll road overhead signs and high mast light poles throughout the Orlando area for the Central Florida Expressway Authority.

Ayres has managed and provided professional inspections for several two-year cycles of Kewaunee County's bridge inspection program. The 2026-2027 cycle includes 40 routine bridge inspections and one underwater inspection in 2026 and approximately five 12-month routine inspections in 2027.

This dam project required both technical skill and sensitivity to the role the facility plays as a focal point in the Village of Grafton's downtown. Ayres designed increased spillway capacity for the Bridge Street Dam through a crest gate on the left side of the dam and a stepped spillway on the right side.