The City's Stormwater Management Manual (SWMM) requires stormwater management if a project:
- Changes an existing stormwater discharge location; or
- Adds or redevelops more than 500 square feet of impervious area. Note, existing or proposed trees in the right-of-way can reduce the amount of area requiring stormwater management.
Note, projects reviewed through a PBOT Minor Improvements Permit will not be reviewed for SWMM conformance.
Find more information about how to determine when a right-of-way project triggers the SWMM.
If stormwater management is required for public improvements, there are four potential options to meet SWMM requirements:
- Discharge to existing facilities.
- Construct new stormwater facilities.
- Apply tree credits.
- Pay an Offsite Stormwater Management Fee through Special Circumstances.
Find more information about how to meet SWMM requirements for projects in the right-of-way.
This guidance provides a simplified explanation of SWMM requirements and additional diagrams to assist applicants with understanding how to implement the SWMM. However, always consult the SWMM for complete requirements.