Chesapeake Bay TMDL Action Plan Study

Wiley|Wilson assisted the City of Staunton with the planning of their Chesapeake Bay TMDL Action Plan. The plan development included critical elements that will be the foundation of the City’s TMDL compliance. Project elements included the characterization of the Municipal Separated Storm Sewer System (MS4) service area, watershed load determination, analysis of Grandfathered project make-up loads, identification of high potential BMPs, and prioritization of stream restoration reaches. The planning has been used to generate estimated implementation costs and to develop funding strategies.

A highlight of the study was the reduction of MS4 service area by 30% through a detailed service area delineation utilizing aerial imagery, GIS data sets, and field inspections. Reducing the service area significantly reduced the City’s mandated pollutant of concern reductions and associate costs.


  • Stormwater Improvement Plan
  • Pollution Reduction Plan
  • Capital project planning and design
  • GIS mapping
  • Survey services
  • Permitting
  • Citizen input
  • Stakeholder coordination

With the completion of Phase I, Wiley|Wilson has moved into Phase II of the study which includes the development of a prioritized list of BMP retrofits, new BMP, and stream restoration projects to achieve TMDL compliance.