31st Street Bridge over Metra Electric
Chicago, Illinois
DB Sterlin provided construction management services for overseeing the demolition and reconstruction of the 31st Street Bridge over Metra Electric and ICR project. Responsibilities included field inspection for adherence to plans and specifications, field measurements and quantity calculations, daily inspection reports, monitoring maintenance of traffic activities, verifying contractor’s layout, and resolution of construction issues. Responsibilities also included managing the project documentation filing system, reviewing project schedule and submittals, responding to Requests for Information (RFIs), chairing progress meetings, generating pay estimates, preparing change orders, and tracking overall project progress.
The project consists of the demolition of the existing 31st Street Bridge (SN 016-6173) and the construction of the 31st Street Bridge (SN 016-6177) over Metra and Illinois Central railroads. The project is being completed in stages, with half of the bridge open to vehicular and pedestrian traffic during construction. The work consists of the demolition of the existing bridge substructure, superstructure, and approach pavement and the construction of bridge piers, abutments, wingwalls, and superstructure. The bridge piers are supported by micropiles and the abutments are supported by vertical and battered H-piles. The removal and construction of the substructure components require the installation of a temporary earth retention system during each stage. Also included in the work is the installation of steel catenary structures and brackets to support Metra Electric components. To maintain the historical appearance of the bridge, the project includes the installation of decorative components such as precast balustrades, precast light poles, and textured finishes on the pier and abutment walls. The work also includes the removal and replacement of sidewalks, ADA ramps, concrete curb & gutter, storm sewer, pavement markings, signage, and landscaping.
