Bridge Service Life Extension Study Sep, 2012 By Christopher A. Ligozio, S.E., P.E., Scott T. Wyatt, P.E., S.E. and Ernst H. Petzold, P.E. In Feature I-70 Blanchette Bridge Concrete Substructures This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ Christopher A. Ligozio, S.E., P.E.Christopher A. Ligozio, P.E., S.E. (chris.liqozio@kpff.com), is a Senior Engineer with KPFF’s Chicago Office. Prev Professional Scholarships to Structures 2012 Congress Next American Job Creators