The Colorado Dept. of Transportation closed Denver's U.S. 6 freeway on the weekend of Feb. 14 to demolish the Knox Court Bridge and part of the Federal Boulevard Bridge over U.S. 6. During the full closure, crews from contractor Edward Kraemer & Sons Inc., Castle Rock, Colo., completed 20 nights' worth of work in 72 hours. Tasks also included a lane shift to allow for additional bridge work, says Kevin Sullivan, CDOT project director. The $98-million project will replace six obsolete bridges on U.S. 6 between Knox Court and Interstate 25 and improve traffic movement in the I-25 and U.S. 6 interchange. The closure marked the start of construction, which is scheduled to be complete in September 2015. The project designer is Felsburg Holt & Ullevig, Centennial, Colo.