I-405 Sepulveda Pass Widening

This $721 million design-build project involves constructing one 10-mile high-occupancy vehicle (HOV) lane northbound on Interstate 405 from Interstate 10 to U.S.-101. The project will realign existing on and off ramps, reconstruct or modify 23 bridge and ramp structures, build approximately 18 miles of retaining walls, and perform road improvements on the adjacent city streets.

Kiewit oversaw demolition of the Mulholland Bridge, coined by the media as “Carmageddon” for its potential impacts to Los Angeles' heavily congested traffic corridor. The demolition was completed 17 hours ahead of schedule.