Post-Construction Stormwater Management
Ordinances & Manuals
Please visit the Town's Unified Development Ordinance Page for our updated Ordinances and Manuals.
Storm Drainage System Inventory Map
Please click the map to view the Town's storm drainage system inventory map.
The purpose of the post-construction stormwater management program is to manage stormwater runoff from new development/redevelopment that drains to the MS4 and disturbs an acre or more of land area for single family projects (1/2 ac. for others), including projects less than an acre that are part of a larger common plan of development or sale. The program also is required to provide a mechanism to ensure long-term operation and maintenance of BMPs and that controls are in place to minimize water quality impacts.
The Town adopted and approved a post-construction stormwater management ordinance, included in the Engineering Design and Construction Manual. The Town enforces and implements the requirements of the ordinance for post-construction stormwater management and only allows the use of stormwater quality BMPs designed in accordance with the NCDEQ Stormwater Design Manual. Additionally, the Town requires annual operation and maintenance (O&M) reports for each BMP and is implementing long term O&M by legal documentation and maintenance security funds.
Structural Stormwater BMP Operation and Maintenance (O&M)
Stormwater O&M Agreements
Prior to the conveyance or transfer of any lot or building site or issuance of any development permit for a development to be served by a structural BMP required by the Design and Construction Ordinance, developers are required to execute and record operation and maintenance agreements to ensure that owners maintain and operate the BMP facility to preserve and continue its function for which it was originally designed. Operation and maintenance agreements require BMP owners to properly maintain, repair and, if necessary, reconstruct the BMP and provide a schedule for the maintenance frequency for the facility. Operation and maintenance agreements must be recorded with the Wake County register of Deeds upon final plat approval and recorded copies must be submitted to the Town within fourteen days following recordation. Town of Morrisville structural stormwater BMP operation and maintenance agreement documents are provided below:
Stormwater O&M Annual Reporting Instructions
The Town now performs annual inspections of all BMPs as a service provided under the Town's stormwater utility fee (more information). If an owner chooses to also do their own, complete reports must include the forms and information below. The Town of Morrisville National Pollution Discharge Elimination System Phase II (NPDES Phase II)
Stormwater Permit requires that structural BMPs be inspected annually
to preserve and continue their function in controlling stormwater runoff
quality and quantity at the degree or amount of function for which the
structural BMP was designed. Additionally, stormwater BMPs must be periodically
inspected per the frequency specified in the recorded operation and
maintenance agreement for the facilities.
- Structural BMP Annual Operation and Maintenance
Inspection Cover Sheet - The inspection report must be submitted and
sealed by a qualified registered North Carolina engineer, surveyor or
landscape architect performing services only in their area of
Appropriate individual structural BMP report
form(s) for all BMPs located on the property - In addition to the
individual report(s) for the date of the official annual inspection,
individual BMP inspection reports must also be provided for the periodic
inspections required as part of the stormwater operation and
All annual inspection reports should be mailed or emailed to the following location:
Stormwater Administrator | Town of Morrisville | Engineering Department
P.O. Box 166 |
Morrisville, NC 27560
email: Stormwater Staff
Town of Morrisville
stormwater BMP inspection reports are available below: