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Transportation Integrated Stormwater Management (TriSWM)

Rotating photos of flooded streetsThe Transportation integrated Stormwater Management (TriSWM) Appendix of the integrated Stormwater Management (iSWM) Criteria Manual for Site Development and Construction is available for use by cities, counties, engineers, private developers, contractors and transportation agencies in the planning and design of stormwater management for streets, roads, and highways.

The purpose of TriSWM is to provide planning and design guidance and a framework for incorporating effective and environmentally sensitive stormwater management practices into the street and roadway project development process and to encourage a greater uniformity in developing plans for stor water management systems that meet the following goals:

  • Provide safe driving conditions
  • Minimize downstream flood risk to people and properties
  • Minimize downstream bank and channel erosion
  • Reduce pollutants in stormwater runoff to protect water quality

TriSWM discusses strategies to aid local governments and the private sector to:

  • Design roads and highways with stormwater impacts in mind
  • Address and mitigate the adverse impacts of development on runoff
  • Implement stormwater controls to meet the TriSWM planning and design approach

For more information on TriSWM, contact Trey Ingram [email form]

TriSWM Brochure - 2014 [PDF]       

TriSWM Presentation in public meetings July 2008 [PDF]      

Water Quality for Street Design Workshop Presentation [PDF]

TriSWM Appendix [PDF]

NCTCOG's iSWM Web site featuring the iSWM Design Manual for Site Development   

Environment and Development Regional Storm Water Management Program   

6/15/2016  05/27/2009 lk

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