Stormwater Control Requirements for Development
The Chatham County Stormwater Management Ordinance requires that a stormwater plan be submitted for projects that will exceed 20,000 square feet of land disturbance. This requirement applies to all new development and redevelopment within County jurisdiction, including private, public, state, and federal development not covered by a separate NPDES permit. Stormwater Management Plans must address the following:
• Capture and treat runoff volume for the 1-year, 1-hour storm event
• Minimum removal of 85% of Total Suspended Solids (TSS)
• Post development peak flow discharges not to exceed the pre-development rates for 1-, 2-, 5-, 10-, and 25- year, 24-hour storm
The Stormwater Permit Application, plan requirements and Stormwater Fees shall be submitted to the Watershed Protection Department for review and approval prior to any land-disturbing activity. Please note that an Operation & Maintenance Agreement must be provided at the time the application is submitted. The link below to NCDEQ's webpage will take you to the O & M EZ Form.
Upon completion of construction, Stormwater As-Built submittals and drawings are required.
All permitted stormwater control measures in Chatham County require an annual inspection for maintenance. All inspection forms are to be submitted to the Stormwater Administrator by December 31st of each year. This includes subdivisions with SCMs, in which inspection and maintenance is required by the HOA.
This is a legal requirement.
For questions regarding the Chatham County Stormwater Program, contact:
Morgan DeWit, PE