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The National Academies

NCHRP 25-25/Task 19 [Completed]

Historic Bridge Rehabilitation / Replacement Decision Making
[ NCHRP 25-25 (Research for the AASHTO Standing Committee on the Environment) ]

  Project Data
Funds: $85,000
Research Agency: Parsons Brinckerhoff
Principal Investigator: Mary McCahon
Effective Date: 9/22/2005
Completion Date: 5/1/2007

This report presents a literature search, findings of a survey on the current state of historic bridge rehabilitation or replacement decision making by state and local transportation agencies, and nationally applicable decision-making guidelines for historic bridges.  The guidelines are intended to be used as the protocol for defining when rehabilitation of historic bridges can be considered prudent and feasible and when it is not based on engineering and environmental data and judgments. The guidelines include identification of various approaches to bringing historic bridges into conformance with current design and safety guidelines/standards, and effect or implications of remedial action on historical significance.

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