On March 23, 1999, about 7:02 a.m., central standard time, eastbound Consolidated Rail Corporation (Conrail) train KAEL-3 struck the side of the lead locomotive unit of southbound Union Pacific Railroad (UP) train ZYCMX-23 at a crossing of Conrail and UP tracks in Momence, Illinois.
As a result of the collision, the lead locomotive unit of the Conrail train and both locomotives and the first 16 cars of the UP train derailed. Diesel fuel from the second UP locomotive was released and caught fire, damaging the locomotive and containers on the freight cars in the immediate area. The UP estimated its damage to be $1,654,000. Conrail estimated its damage to be $137,000.
Both conductors and engineers were hurt. The Conrail conductor refused treatment on scene, and the Conrail engineer and both UP crewmembers were treated and released from a local hospital.