NTSB opens public docket for investigation into fatal Coolidge, Ariz. pipeline rupture
(UC) — The National Transportation Safety Board opened the public docket Thursday as part of its ongoing investigation of the fatal, Aug. 15, 2021, natural gas transmission pipeline rupture and fire near Coolidge, Arizona.
The docket for this investigation includes more than 1,200 pages of information, including reports on pipeline operations, human performance, metallurgical testing, and emergency response efforts. The docket also includes interview transcripts, photographs, employee training records, and other investigative materials.
The docket contains only information collected by NTSB investigators; it does not provide the final report, nor does it contain analysis, findings, recommendations, or probable cause determinations. As such, no conclusions about how or why the rupture occurred should be drawn from the information within the docket. Analysis, findings, recommendations, and probable cause determinations related to the rupture will be issued by the NTSB in a final report later.
A 30-inch pipeline owned and operated by Kinder Morgan Inc. ruptured and released natural gas that ignited. The rupture resulted in an explosion, fire, and ejection of a 46-foot section of the pipeline. One residence was destroyed by the explosion and subsequent fire, resulting in two fatalities and one injury.
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