The agency announced Wednesday it will release 1,400 pages of documents in connection with the investigation Thursday.
“The documents being released are factual in nature and do not provide any analysis. They include interview transcripts, photographs, and other documents from the investigation,” the NTSB said.
The agency added an “analysis of the accident, along with conclusions and a determination of probable cause, will come at a later date when the final report on the investigation is completed.”
The Dec. 11 blast tore apart a 20-foot section of pipeline launching more than 40-feet from its original location. Three homes were destroyed along with a section of Interstate 77. There were no serious injuries.
