2019 County BMP Design Manual and New Forms Have Been Posted

The County BMP Design Manual has been updated to incorporate changes made in the May 2018 Model BMP Design Manual and to address County specific topics. This version incorporates improvements identified during implementation and in response to input received from stakeholders and industry representatives. Examples include the simplification of infiltration testing requirements, the inclusion of new tools for using tree wells to satisfy structural performance standards, and a clearer articulation of source control BMP requirements.

This update includes the following revisions:

• Pollutant control and hydromodification management clarifications
• Biofiltration BMP sizing methods
• Bioretention soil media (BSM) update
• Infiltration feasibility methods
• Revised sizing factors for hydromodification management
• Integrated guidance for structural BMP maintenance
• Self-retaining DMAs with tree wells
• New submittal forms

The 2019 BMP Design Manual can be viewed here. The page provides both 2019 and 2016 versions of the Manual, however if you have a project in process, please contact your PDS Land Development Project Manager or other County contact for applicability requirements.