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
Illinois Department of Transportation (IDOT) | Cumberland Avenue
As traffic increased near the O’Hare International Airport, the Illinois Department of Transportation (IDOT) saw the need to widen Cumberland Avenue (IL 171) over the Kennedy Expressway (I-90). In addition, IDOT had plans to widen/expand I-90 in the vicinity of this project. IDOT tasked Patrick with providing Phase II, final engineering/design services for a new, two span bridge that was eight (8) lanes wide, and approximately 270-feet long. The center support is located adjacent to two CTA track and consists of a 4-foot-wide solid wall pier on 36-inch diameter drilled shafts cored into rock. Extensive coordination with the CTA was required due to the proximity of pier removal and construction near their active tracks and station. To improve operations, the roadway was widened outside the bridge reconstruction limits to allow for additional turn lanes at the adjacent intersections. Additionally, designed a new spur ramp, from the I-90 eastbound exit ramp directly to Bryn Mawr Avenue, to alleviate congestion along Cumberland Avenue.