Doing Business with South Carolina Department of Transportation

Water Quality Design Manual

The SCDOT Water Quality Design Manual is a guidance document developed to provide engineers, plan reviewers, inspectors, and contractors information on the stormwater quality management requirements for SCDOT including, but not limited to:


  • Requirements of the NPDES permit application process for construction projects
  • Stormwater best management practices for construction projects
  • Stormwater best management practices for post-construction


This manual was prepared in fulfilment of the requirements of the NPDES Permit No. SCS040001; South Carolina Regulation 63-380, Standard Plan for Erosion, Sediment and Stormwater Runoff Control; and, the South Carolina Stormwater Management and Sediment Reduction Act of 1983 (Title 48, Chapter 18 for the South Carolina Code of Laws, 1983 as amended).

Water Quality Design Manual

Water Quality Design Manual
Appendix A - Surface Outlet and Baffle Sediment Basins and Multipurpose Basins
Appendix B - Design Criteria for Temporary Water Quality BMPs Used During Construction
Appendix C - during Construction BMP Tables
Appendix D - Pollutant Removal Mechanics
Appendix E - Design Criteria for Post-Construction Water Quality BMPs
Appendix F - Post-Construction BMP Tables
Appendix G - Erosion Related Information for South Carolina Soils
Appendix H - Rainfall and Universal Soil Loss Equation (USLE) Data
Appendix I - Calculations and Design Aids for Non-Standard SCDOT Sediment Controls
Appendix J - Standards for Stormwater Management and Sediment Reduction Regulations 72-405 thru 72-445

Water Quality Design Memorandums

2015-1 WQDM-01 - Revised Erosion Control Data Sheets 11/06/15
2015-2 WQDM-02 - NPDES Information on Construction Plans 10/20/16