Low Impact Development Technical Manual

The Manual is currently being updated to the most recent land development code changes as of July 27th 2023.  

The attenuation criteria is in the process of being updated to a 10-year 24-hour storm event with an intensity of 0.43 in/hr. 


**Please contact the Planning Department for assistance at 850-267-1955.**


Submit comments or questions to: engineering@co.walton.fl.us 

  1. Introduction
  2. Volume 1 - Site Evaluation
  3. Determine Stormwater Retention Volume
  4. Volume 2 - EPA LID Stormwater Evaluation Design Software
  5. Volume 3 - Design LID SWMF By Hand
  6. Additional Design Considerations
  7. Appendix A - Suggested Plants
  8. Appendix B - References
  9. Appendix B - Glossary
  10. Appendix B - Acronyms
  11. Appendix C & D - Design Storms and Permitting Guidance