PITTSBURGH — The National Transportation Safety Board's preliminary report Monday on the Jan. 28 Fern Hollow Bridge collapse indicates the bridge began falling from the Squirrel Hill side of the structure, but it doesn't offer any reason why.
The report, which the agency normally releases about 10 days after a major incident, indicates the agency expects to spend more time at the Frick Park ravine where the bridge debris fell. Its full investigation could take as long as 18 months.
The investigation team, lead by NTSB Chairwoman Jennifer Homendy, has been reviewing the scene since the collapse happened. Construction crews over the weekend began lifting heavy pieces of debris so investigators could look under it for evidence.
