It took only 20 hours this past weekend for crews to demolish and replace the eastbound lane of a twin bridge in Southeast, N.Y., under a federally funded accelerated bridge construction (ABC) program that involves the use of precast parts. The new 80-ft-long and 57-ft-wide bridge with full shoulders sits beside a new westbound span on Interstate 84 over Dingle Ridge Rd. The westbound bridge was completed Sept. 21, also in 20 hours.
The $10.2-million I-84 project is only the second using the Transportation Research Board's (TRB) Strategic Highway Research Program's ABC toolkit, says Bala Sivakumar, vice president and director of special bridge projects at HNTB Corp., project designer and developer of the toolkit. The first was the Keg Creek Bridge in Iowa, completed in 2011.