Synthesis of Information Related to Highway Practices. Topic 55-07. Complying with Stormwater Retrofit Permit Requirements Through Third-Party Partnerships

Due to the lack of stormwater control facilities on many existing highways, state departments of transportation (DOTs) are required to retrofit the stormwater conveyance system with improved treatment facilities to comply with regulatory requirements such as National Pollutant Discharge Elimination System (NPDES) stormwater permits, state water quality/stormwater regulations, Endangered Species Act (ESA) consultation, and Total Maximum Daily Load (TMDL) prescribed actions. As stormwater runoff quality and quantity are increasingly being addressed, state DOTs are seeking information on effective watershed-based strategies. To comply with permit requirements in a more cost-effective manner, many state DOTs are partnering with third parties. However, due to the lack of standard guidelines or regulations, state DOTs are devising diverse mechanisms to implement these partnerships. The objective of this synthesis project is to document practices used by state DOTs regarding stormwater retrofit partnerships with third parties.


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  • Status: Proposed
  • Funding: $55000
  • Contract Numbers:

    Project 20-05, Topic 55-07

  • Sponsor Organizations:

    National Cooperative Highway Research Program (NCHRP) Synthesis

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC    20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Nasri, Arefeh

  • Start Date: 20230427
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01884614
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-05, Topic 55-07
  • Files: TRB, RIP
  • Created Date: Jun 5 2023 4:13PM