Stormwater Management


The purpose of the Phase II Stormwater Ordinance is to protect, maintain and enhance the public health, safety, environment and general welfare by establishing minimum requirements and procedures to control the adverse effects of increased post-development stormwater runoff and nonpoint source pollution associated with new development and redevelopment as well as illicit discharges into municipal stormwater systems. It has been determined that promoting management of construction-related and post-development stormwater runoff will minimize the damage to public and private property and infrastructure; safeguard the public health, safety, and general welfare; and protect water and aquatic resources. 

Objectives and Means

The Phase II Stormwater Ordinance seeks to meet its general purpose through the following specific objectives and means:

  1. Establishing the decision-making process for development that protects the integrity of watersheds and preserves the health of water resources;
  2. Requiring that new development and redevelopment maintain the pre-development hydrologic response in their post-development state as nearly as practicable for the applicable design storm to reduce flooding, streambank erosion, nonpoint and point source pollution and increases in stream temperature, and to maintain the integrated stream channels and aquatic habitats;
  3. Establishing minimum post-development stormwater management standards and design criteria for the regulation of control of stormwater runoff quantity and quality;
  4. Establishing design and review criteria for the construction, function, and use of structural stormwater SCMs that may be used to meet the minimum post-development stormwater management standards;
  5. Encouraging the use of better management and site design standards, such as the use of vegetative conveyances for stormwater and the preservation of greenspace, riparian buffers, and other conservation areas to the maximum extent practicable;
  6. Establishing provisions for the long-term responsibility and maintenance of structural and nonstructural stormwater SCMs to ensure that they continue to function as designed, are maintained appropriately, and pose no threat to public safety;
  7. Establishing administrative procedures for the submission, review, approval, and disapproval of stormwater management plans, for the inspection of approved projects, and to assure appropriate long-term maintenance;
  8. Coordinating site design plans that include open space and natural areas with all adopted land use plans and ordinances;
  9. Controlling illicit discharges into the municipal stormwater system; and
  10. Assigning responsibility and processes for approving the creation of maintenance of adequate drainage and flood damage prevention measures.

An updated draft of the Phase II Stormwater Ordinance will be available for review and public comment soon.

Phase II Stormwater Ordinance

Stormwater Design Manual

Low Impact Development (LID) Guide

NC LID Guidebook

Phase II Stormwater SCM Locations Map

Black Mountain SCM Locations Map

Related Documents

Residential Rain Garden Workshop

The Town of Black Mountain Planning Department, in partnership with RiverLink and NC State University Cooperative Extension, is excited to announce a Residential Rain Garden Certification Workshop!

Saturday, September 21, 2019, @ Carver Community Center                                                                                                                                                                                                            

 Non-Certification Fee: $25.00 (includes break service, lunch, and the NC State University Rain Garden Manual)                                                                                                                 

Certification Fee: $100.00 (includes break service, lunch, and the NC State University Rain Garden Manual and workshop notebook)                                                                             

This workshop, led by experienced installers from NC State University – Cooperative Extension, will familiarize participants with the installation and maintenance of different kinds of stormwater BMPs and to certify qualification to properly design and install many of the practices.

As a result of this training you will:

  • Understand why stormwater needs to be managed.
  • Understand the importance of properly-designed practices.
  • Understand the principles of rain garden location, construction and maintenance.
  • Learn how to properly design and size rain gardens and other BMPs.
  • Be able to select appropriate vegetation.
  • Design, build and plant a small rain garden.
  • Be eligible to take a test at the conclusion of the training to be certified in rain garden design and installation.

Please follow the link below to register for the workshop and to find additional information regarding the schedule and what to bring.