bridge + structural
our expertise
Patrick’s bridge and structures client list boasts Class I railroads, major passenger and transit agencies, regional and short line railroads, state departments of transportation, public utilities, and major corporations in a wide range of industries. From innovative, complex bridge and tunnel structures, to planning, studies and everything in between, Patrick recognizes the importance these structures have on the environment around us. With an eye toward safety, environmental protection, ease of maintenance, and overall cost, Patrick provides structural solutions that meet the wide variety of needs of our clients.
our disciplines
Structure Inspections + Load Ratings
Highway + Rail Structure Design
Steel, Concrete, Precast Segmental
Construction Engineering
Retaining Systems
Erection Engineering
Cofferdams + Specialty Structures
Foundation Design
Environmental + Geotechnical Engineering
Constructability + Value Engineering
Building Retrofits
Accelerated Bridge Construction (ABC) Technologies
Project Management
Owner's Representative Services
Scheduling, Estimating + Risk Management
our projects
Louisville & Indiana Railroad (LIRC) | Flatrock River Bridge
Patrick, as a subconsultant to J.B. Fay Company, was selected to replace the existing Louisville & Indiana Railroad (LIRC) bridge located in Columbus, Indiana at milepost 40.19. The replacement bridge was constructed under a Design-Build delivery method and involved the accelerated replacement of LIRC’s bridge over the Flatrock River. This project was funded by and designed to CSX Standards, with Patrick serving as the Engineer of Record. The existing bridge was 508-feet long and comprised of seven 30-foot steel deck span girders and two 144-foot-long steel through truss spans and was partially submerged during 100-year storm events. The replacement structure is comprised of eight 30-foot concrete approach spans; one 115-foot ballasted deck through plate girder (TPG); five 34-foot approach spans. The substructure consists of concrete caps founded on two drilled shafts. A single 96-hour continuous outage was planned for the superstructure change out; during which time the existing bridge would be demolished and the TPG bridge was rolled into place. Patrick worked with a contractor to develop an initial project concept; incorporating innovative planning/design details throughout the final design, enabling J.B Fay to replace the entire structure and raise the track profile 5-feet, in just 48-hours.