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  1. Home
  2. National Pollutant Discharge Elimination System (NPDES)

Transportation Resources

Innovative Materials and Good Practices

Illicit Discharge Detection and Elimination

  • Fact Sheet - Outfall Inventory Overview.doc (pdf) (394.03 KB)

Maintenance of Best Management Practices

  • Caltrans BMP Field Manual Troubleshooting Guide (pdf) (1.34 MB)

Pollution Prevention and Good Housekeeping

  • Environmental Stewardship Practices, Procedures, and Policies for Highway Construction and Maintenance (pdf) (4.86 MB)

Site-Specific

  • Context Sensitive Solutions in Designing Major Urban Thoroughfares for Walkable Communities (pdf) (9.04 MB)

Selecting Best Management Practices

  • Stormwater Quality Benefits of a Porous Asphalt Overlay (pdf) (308.48 KB)
  • Tennessee State DOT Post-Construction Stormwater Best Management Practices Research Report (pdf) (19.78 MB)

Specific Pollutants

  • Preliminary Environmental Investigation of Heavy Metals in Highway Runoff (pdf) (453.73 KB)
  • Case Studies and Projects

    Highway/Interstate

    • Compost Use on State Highway Applications: Current Compost Usage by State DOTs (pdf) (1.5 MB)

    Local Roads/Streets

    • Street Reconstruction with Pervious Pavers in Westmoreland neighborhood of Portland, Oregon (pdf) (210.47 KB)

    Alleys

    • The Chicago Green Alley Handbook (pdf) (3.72 MB)

    Shared Use Paths

    • Connections - The National Transportation Enhancements Clearinghouse Newsletter - Fall 2007 (pdf) (565.1 KB)

National Pollutant Discharge Elimination System (NPDES)

  • About NPDES
    • Permit Basics
    • State Program Information
    • Permit Limits
    • Program Management and Oversight
    • NPDES Regulations
    • Other Federal Laws that Apply to the NPDES Permit Program
  • All NPDES Program Areas
    • Animal Feeding Operations
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      • Combined Sewer Overflows (CSOs)
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    • Water Quality Trading
  • NPDES Technical Resources
    • Resources for Permit Writers
    • NPDES Permit Writers' Manual
    • NPDES Training
    • Tools
    • Electronic Notice of Intent (eNOI)
    • NPDES Applications and Forms
Contact Us About NPDES
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 22, 2025
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