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Federal Railroad Administration, Office of Safety Headquarters Assigned Accident Investigation Report HQ-2007-40, Union Pacific (UP), Tama, Iowa, June 26, 2007.
| 题名： | Federal Railroad Administration, Office of Safety Headquarters Assigned Accident Investigation Report HQ-2007-40, Union Pacific (UP), Tama, Iowa, June 26, 2007. |
| 关键词： | *Accident-investigations; *Railroad-trains; *Railroad-passenger-service; *Iowa-.;Commuter-transportation; Derailment-. |
| 摘要： | On June 26, 2007, at 3 p.m. C.D.T., an eastbound Union Pacific Railroad Company (UP) loaded coal train, identified as Train Symbol 2CATKI-24, here and after noted as Train No. 1, operating at a recorded speed of 26 mph derailed 41 cars of its 138-car train (cars 67 through 108 from the head-end). The derailment occurred in Tama County, approximately 1 3/4 miles west of Tama, Iowa. It occurred on the UPs Council Bluffs Service Unit, Clinton Subdivision at milepost (MP) 134.75, Main Track No 1. The derailed equipment of Train No. 1 struck an adjacent, passing, westbound, intermodal train, identified as Train Symbol KG2TS-25, here and after noted as Train No. 2, operating at a recorded speed of 21 mph on Main Track No. 2. This collision did not result in any derailed equipment of Train No. 2 and its 3-man crew was uninjured. The fuel tanks on the locomotives of Train No. 2 were not compromised and no diesel fuel was released. The estimated damage cost for track is $120,670 and $792.529 for equipment. The train crews of both trains were drug/alcohol tested. At the time of the accident it was daylight and clear. The temperature was 89 degrees Fahrenheit. The probable cause of the derailment was an alignment irregularity in the track, Cause Code T108. The area had a long history of alignment and surface problems. Resent heavy rains and subgrade saturation added to the instability of this area. A probable contributing factor was speed and train handling, Cause Code H699. The train passed over the point of derailment 6 mph faster then the posted speed. Shortly after the lead locomotives passed over the point of derailment, a request for dynamic braking was made. This excessive speed and train handling placed greater dynamic forces on an already unstable track structure. |
| 报告类型： | 科技报告 |
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