A total collapse of the southbound Interstate 5 to northbound State Route 14 overpass occurred as a result of the February 9, 1971 Sylmar earthquake. This collapse resulted in the additional collapse of the intersecting southbound State Route 14 to southbound I-5 overpass (as this connector bridge was directly beneath the 5/14 overpass). Both bridges fell directly onto the southbound I-5 truck bypass. There was damage to all structures involved, varying from minor cracking and splaying, to the loss of complete sections of bridges.