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Best Practices in Addressing NPDES and Other Water Quality Issues in Highway System Management

Best Practices in Addressing NPDES and Other Water Quality Issues in Highway System Management. NCHRP 20-68A, Scan 08-03 DOMESTIC SCAN PROGRAM Scan Overview. Domestic Scan Program. Purpose: Technology transfer Approach

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Best Practices in Addressing NPDES and Other Water Quality Issues in Highway System Management

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  1. Best Practices in Addressing NPDES and Other Water Quality Issues in Highway System Management NCHRP 20-68A, Scan 08-03DOMESTIC SCAN PROGRAM Scan Overview

  2. Domestic Scan Program • Purpose: Technology transfer • Approach • Develop ‘study’ questions and review the programs at high-performing agencies • Develop education materials for public dissemination • Summary Report • Presentation • Scan Report • Implementation

  3. Implementation Outcomes • Report/ catalogue of ready to implement technologies, methods and processes • Applied Studies to examine specific practices in greater depth • Influence on agency business practices • Suggestions for national regulatory procedures development

  4. Scan 08-03 Team • Scott McGowen- AASHTO Chair, Caltrans • Brian Smith – Co-Chair, FHWA • Scott Taylor – Subject Matter Expert, RBF Consulting • Vince Davis, Delaware DOT • Frannie Brindle, Oregon DOT • Matt Lauffer, North Carolina DOT • Mark Hemmerlein, New Hampshire DOT • Patricia Cazenas, FHWA • Rachel Herbert, EPA • Jeff Lewis, FHWA • Tom Ripka, Illinois DOT • Mandeep Arora, Arora & Associates

  5. Scan Sites • Buffalo, NY • Washington DC • Baltimore, MD • Raleigh, NC • Austin, and College Station, TX • Orlando, FL

  6. Scan Focused on Four Topic Areas • Total Maximum Daily Loads (TMDLs) • Best Management Practices (BMPs) • DOT Practices/Procedures • Regulatory (e.g., 401s)

  7. Topic A: TMDLs • TMDL Implementation • TMDLs in MS4 Permits • DOT implementation strategies • Source control • BMP retrofit • Water Quality Credit Trading • Credit trading for TMDL compliance • Impervious area credit trading

  8. Currently no credit trading programs but they will be important as a compliance strategy DOTs are uniquely impacted by TMDLs DOTs must support the TMDL process with good science and data A clear TMDL compliance pathway is essential TMDLs must be integrated Topic A TMDLs - Results

  9. Topic B: BMPs • Water Quality Traditional and Innovative Best Management Practices (BMPs) • Construction and post-construction emerging BMPs • LID for highways – what are the opportunities • Jurisdictional wetland issues and treatment devices • Non-structural and Source Control Management Options • Source of pollutants within the ROW and relative load • Source control programs

  10. DOTs pursuing applied studies in partnership with Universities Polyacrylamide application Nutrient removal BMPs Batch detention Permeable Friction Course (PFC) overlay Source and institutional controls Mowing Traction aides Herbicide/pesticide application Public education Topic B BMPs - Results

  11. Topic C: DOT Practices/Procedures • Agency Maintenance and Operations Practices • Tracking and maintaining treatment BMPs • O&M processes that improve water quality • Program compliance reporting and tracking • Program reporting • Incident reporting • Compliance reporting • Program effectiveness assessment

  12. Construction Site BMP Inspection Priority for many DOTs Innovative methods for compliance Treatment BMP Tracking Comprehensive database tools Design, Build, Operate and Maintain New delivery method for BMPs Topic C DOT Practices and Procedures - Results

  13. Topic D: Regulatory • Coordination with Local and Federal Regulators • Approach to communication with regulators • Structure of DOT staff vs. regulatory agency • 401 Certifications • Consistent with MS4 Permit requirements • Compliance issues

  14. Partnerships Culture of environmental stewardship within the DOT Structure of DOT DOT funded positions Program flexibility Program costs Outreach Topic D Regulatory - Results

  15. DOTs are Different • DOTs have unique challenges in implementing an NPDES stormwater program as well as in responding to TMDL requirements. DOTs: • Cross multiple watersheds and jurisdictional boundaries • Control a very small portion of the watershed • DOTs have safety as a high priority • DOTs are passive and uniform

  16. Study Findings • DOTs should refine their approach to program implementation • Hydromodification • Particulates • Other constituents DOTs can control • Modify other traditional MS4 elements: • Public Education • Runoff Characterization • Illicit Connections

  17. Other Findings • DOT Business Practices • Commitment from the top • Continued dialogue • Partnerships and communication • Evaluate programs based on cost/benefit • Incorporate stormwater early in project delivery process

  18. Scan Recommendations • TS4 Permit • Create a model permit for use by states • National Guidance on DOT TMDL Application • Credit trading • New Emphasis on Source Control • Annual DOT Stormwater Conference • Integrate Stormwater Program Responsibility with the DOT

  19. Scan Recommendations – Con’t • Invest in pooled-fund studies • Collect Cost Data for Program Elements • Invest in BMPs for Highway Maintenance Activities • Develop a Stormwater Track for TRB

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