NTSB: Permit said operator responsible for determining vertical clearances

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by KING 5 News

KING5.com

Posted on May 25, 2013 at 6:13 PM

Updated Monday, May 27 at 12:40 PM

NTSB Chairman Deborah Hersman answers questions at May 25, 2013 press conference regarding Skagit River bridge collapse.

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