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The National Academies

NCHRP 25-25/Task 93 [Active]

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
Staff Responsibility: Crawford F. Jencks
Research Agency: Louis Berger & Associates
Principal Investigator: Edward Samanns
Effective Date: 5/15/2014
Completion Date: 9/18/2015
Comments: Research in progress

The goal of this research is to quantify the long-term costs of road stream crossings that span the bankfull width of a waterway in order to provide an accurate picture of the total life-cycle cost of the structure. These costs will then be compared to the costs of structures that constrict stream flows. Understanding the true cost of each structure type would help project designers make the most cost-effective structure choice and better comply with state and federal environmental regulations.

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