RFK Bridge Ramp Replacement RK-73
LiRo provided design review and construction management for the reconstruction of the Manhattan-to-Queens ramp of the RFK Bridge, TBTA's largest design-build contract to date. The elevated ramp carries two Queensbound lanes from the Manhattan Toll Plaza, and is joined by two additional lanes bringing traffic from the Bronx Toll Plaza. The deck, superstructure steel, and pier caps of this 1,850 ft long structure showed significant deterioration. The design of the wider replacement ramp incorporates a seismically reinforce galvanized steel superstructure and concrete deck. The piers were retrofitted, certain piercaps were lengthened to accommodate the wider superstructure, and spalled concrete was repaired. New roadway lighting, a traffic gantry and signage was added. The bridge has been upgraded to support HS-25 live load. Seismic isolation bearings replaced existing rocker bearings, and existing foundations were strengthened.
The bridge carries an average 170,000 vehicles daily, and maintenance of traffic during construction was a primary concern. A temporary, two-lane bridge was built in an open, unused space between the old ramp and the main roadway while the original ramp was demolished. Several TBTA, New York City Police Department and New York City Parks Department facilities, including Iahn Stadium, are located under and adjacent to the bridge. Extensive coordination with those facilities, as well as with Con Ed, NYCDEP, and other city agencies, was required to enable the building occupants to continue their operations unimpeded.
The ramp rehabilitation work was completed one month ahead of schedule, and the project received accolades from the MTA. LiRo's work at the site is continuing with the management of the Bronx Plaza reconstruction under project RK-65A.
Resident/Construction Engineering & Inspection