Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra-urban Areas

Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra-urban Areas

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qTRB's National Cooperative Highway Research Program (NCHRP) Report 728: Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra-Urban Areas provides guidelines to evaluate and select hydraulic modifications to existing drainage infrastructure that will help mitigate potential impacts of highway runoff on receiving waters. The guidelines are directed specifically at roadway facilities in dense urban areas that can be particularly difficult and costly to retrofit because of space limitations, high pollutant loadings, hydrologic flashiness, hydraulic constraints, legacy contamination, utility conflicts, and other issues. The guidelines are accompanied by a MicrosoftAr Excel-based design and sizing tool on a CD-ROM included with the print version of the report. The tool generates best management practice (BMP) performance curves that relate the performance and design criteria for selected BMP controls described in the guidelines for each of the 15 U.S. rain zones. The Excel spreadsheet that is content on the CD-ROM is available for download.q--Summary.WSDOT has established programmatic retrofit procedures that are integrated into the statea#39;s Highway Runoff Manual (WSDOT, 2008a). ... NCDOT has constructed 43 stand-alone retrofit projects, with another 23 in the planning stages (NCDOT, 2008a). ... Caltrans: The California Department of Transportation (Caltrans) routinely implements stormwater retrofits in conjunction with major redevelopmentanbsp;...


Title:Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra-urban Areas
Author:
Publisher:Transportation Research Board - 2012-01-01
ISBN-13:

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