Honor Award – HNTB Corporation, Kansas City
Project: BNSF Br. 482.1 West Approach Replacement
Client: BNSF Railway
By utilizing accelerated bridge construction techniques, the 2,712-foot-long approach to BNSF’s Bridge 482.1 was successfully replaced in four phases, which reduced impacts to rail traffic and shortened the construction schedule by five months. Reduced track closure windows are critical on this important rail line which carries 90 million gross tons of intermodal and coal traffic annually. Innovative aspects of the project include a hybrid drilled shaft-micropile foundation, which reduced potential movement of the existing foundation, and the use of rollers, which allowed spans ranging in length from 176.5 feet to 191 feet to be moved during the short track closure windows. The reconstruction project, completed in August 2017, will reduce future maintenance costs and increase the bridge’s survivability rate during a seismic event.