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Post-Construction Stormwater Management



The purpose of the post-construction stormwater management program is to manage stormwater runoff from new development/redevelopment that drains to a permitted stormwater system and disturbs an acre or more of land surface, including projects less than an acre that are part of a larger common plan of development or sale. We recommend reintroducing runoff from impervious surfaces into the natural environment as close to the surfaces as possible. 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.

Henderson County adopted and approved a post-construction stormwater management ordinance, included in the Code of Ordiances, on September 1, 2010. Henderson County 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 NCDENR Stormwater Best Management Practices Manual unless prior approval has been obtained from the DEQ's NEST Program. Additionally, Henderson County requires annual operation and maintenance (O&M) reports from BMP owners and implements long term O&M by legal documentation.

Henderson County allows the Stormwater LID and Storm EZ spreadsheet to be used when developing a project.

Areas subject to the Stormwater Phase II Post-Construction program can be found at this link. Once you find your address the map will indicate the permitting authority for your project.

Submittal Requirements

Provide one (1) electronic PDF copy of drawing, calculations, narrative, specifications, design checklist and all other paperwork.

Provide one (1) paper (original) copy of all forms (i.e. application, operations and maintenance agreements, access easement, stormwater agreement, etc) (All forms that require a notary seal or are recorded at the Henderson County Courthouse).

Review Fees can be found here.

All Stormwater Forms can be found here. Stormwater Application Form and Design Checklist required to be completed for submital. Reference the instructions when completing the application. Refer to the Fiscal Year Fees and Charges Manual for correct fees. Required Stormwater Forms for all Structural Stormwater BMP's can be found on the stormwater forms page here.

Ordinances and Design Manuals

Please visit the Henderson County Code of Ordiances Page for our latest updated ordinances.

A new State stormwater Best Management Practice (BMP) Manual was released January 1, 2017. The new Manual can be found at https://deq.nc.gov/sw-bmp-manual. This manual is required to be used when chosing a bmp for your proposed project.

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