About 7:40 p.m. on August 2, 1985, Burlington Northern Railroad Company mixed freight train Extra 6311 West collided head-on with Burlington Northern Railroad Company unit gravel train Extra 6575 East at milepost 12.5, near Westminster, Colorado. Extra 6311 West was traveling about 52 mph, and Extra 6575 East was traveling about 48 mph. The trains collided on the single main track during daylight hours in a 2 41' left curve in a westerly direction about 50 feet west of a dual-lane bridge on U. S. Highway No. 36. The bridge was destroyed by derailed cars which struck structural support members and by fire which erupted following the collision. Three crewmembers of Extra 6311 West and two crewmembers of Extra 6575 East were killed. The Burlington Northern Railroad Company estimated the damage to be about $4 million.