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The National Academies

NCHRP 25-25/Task 93 [Final]

Long-Term Construction and Maintenance Cost Comparison for Road Stream Crossing Hydraulic Design vs. Bankfull Width Design
[ NCHRP 25-25 (Research for the AASHTO Standing Committee on the Environment) ]

  Project Data
Funds: $124,700
Research Agency: Louis Berger & Associates
Principal Investigator: Edward Samanns
Effective Date: 5/15/2014
Completion Date: 9/18/2015

PROJECT STATUS:  This project is complete and the contractor's final report is available HERE.

The research objective was to quantify and compare the long-term costs of road stream crossings that span the bankfull width of a waterway to the costs of structures that constrict stream flows. Understanding the true cost of each structure type should aid project designers make the most cost-effective structure choice and better comply with state and federal environmental regulations.

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