Standards for stormwater quality management.
Winston-Salem Code of Ordinances § 75-302
in effectSec. 75-302. - Standards for stormwater quality management.
(a) Development standards for low-density projects. Low-density projects shall comply with each of the following standards:
(1) Stormwater runoff from the development or redevelopment shall be transported from the development or redevelopment by vegetated conveyances to the maximum extent practicable.
(2) Other than for those limited exceptions set out in paragraph (3) below, all BUA for every development or redevelopment shall be set back in accordance with the standards labeled "Required Landward Buffer Widths" and "Undeveloped Buffer", at a minimum, as stated in the Table 1 below, as measured from the top of the stream bank of all perennial and intermittent surface waters.
Table 1
Development or Redevelopment Size | Required Landward Buffer Widths | Undisturbed Buffer Widths (Within Landward Buffer)
0—10 Acres | 30 Feet | 15 Feet
10—50 Acres | 50 Feet | 25 Feet
Greater than 50 Acres | 100 Feet | 50 Feet
(3) Right-of-way crossings, below ground level utility crossings or encroachments, and greenways, if approved pursuant to a stormwater management permit or pursuant to a development or a redevelopment site plan, may be located within the landward buffer. Other than approved right-of-way and utility crossings, these exceptions to the landward buffer may not be located within the undisturbed buffer.
(4) A perennial or intermittent surface water shall be present if the feature is approximately shown on either the most recent version of the soil survey map prepared by the Natural Resources Conservation Service of the United States Department of Agriculture or the most recent version of the 1:24,000 scale (7.5 minute) quadrangle topographic maps prepared by the United States Geologic Survey (USGS), or is determined by the city or the division to exist in the field. An exception to this requirement may be allowed when surface waters are not present in accordance with the provisions of 15A North Carolina Administrative Code 2B .0233(3)(a) or similar site-specific determination made using division-approved methodology.
(b) Development standards for high-density projects. High-density projects shall implement stormwater control measures that comply with each of the following standards:
(1) The stormwater management systems shall control and treat stormwater runoff volume leaving the project site for the first one inch of rain. Runoff volume drawdown time shall be a minimum of 48 hours, but not more than 120 hours.
(2) High-density projects must discharge the storage volume at a rate equal to or less than the predevelopment discharge rate for the one-year, 24-hour storm.
(3) All stormwater management systems used to meet the requirements of this ordinance shall be designed to have a minimum of 85 percent average annual removal for total suspended solids;
(4) General engineering design criteria for all projects shall be in accordance with 15A North Carolina Administrative Code 2H .1008(c), as explained in the design manual;
(5) Other than for those limited exceptions set out in paragraph (6) below, all BUA for every development or redevelopment shall be set back in accordance with the standards labeled "Required Landward Buffer Widths" and "Undeveloped Buffer", at a minimum, as stated in the Table 1 below, as measured from the top of the stream bank of all perennial and intermittent surface waters.
Table 1
Development or Redevelopment Size | Required Landward Buffer Widths | Undisturbed Buffer Widths (Within Landward Buffer)
0—10 Acres | 30 Feet | 15 Feet
10—50 Acres | 50 Feet | 25 Feet
Greater than 50 Acres | 100 Feet | 50 Feet
(6) Right-of-way crossings, below ground level utility crossings or encroachments, and greenways, if approved pursuant to a stormwater management permit or pursuant to a development or a redevelopment site plan, may be located within the landward buffer. Other than approved right-of-way and utility crossings, these exceptions to the landward buffer may not be located within the undisturbed buffer.
(7) A perennial or intermittent surface water shall be present if the feature is approximately shown on either the most recent version of the soil survey map prepared by the Natural Resources Conservation Service of the United States Department of Agriculture or the most recent version of the 1:24,000 scale (7.5 minute) quadrangle topographic maps prepared by the United States Geologic Survey (USGS), or is determined by the city or the division to exist in the field. An exception to this requirement may be allowed when surface waters are not present in accordance with the provisions of 15A North Carolina Administrative Code 2B .0233(3)(a) or similar site-specific determination made using division-approved methodology.
(c) Water-borne trash and debris. To reduce the amount of water-borne trash and debris, the owner shall develop, implement and maintain an approved trash and debris collection and disposal program for the development or redevelopment.
(d) Oxygen depleting organic material. To reduce the oxygen depleting impacts of organic material decay on receiving waters, the owner shall develop, implement and maintain an approved leaf and vegetation collection and disposal program for the development or redevelopment.
(e) Water supply watershed regulations compliance. On-site stormwater management for water quality purposes shall meet all pertinent regulations associated with the water supply watershed regulations.
(f) Jurisdictional waters regulations compliance. Any proposed impacts to jurisdictional wetlands and/or jurisdictional waters of the United States shall be reviewed and approved by appropriate regulatory agencies such as the U.S. Army Corps of Engineers (wetlands - Clean Water Act, Section 404) and the department or division (water quality certification - Clean Water Act, Section 401). Proof of compliance with this requirement shall be provided by the owner before the building inspector shall issue a certificate of compliance.
(Ord. No. 4618, § 1, 5-19-08)
Source: City of Winston-Salem, North Carolina, Code of Ordinances, City Charter and Related Laws (Municode Library, library.municode.com)URL: https://library.municode.com/nc/winston-salem/codes/code_of_ordinances?nodeId=PTIIICOOR_CH75STMA_ARTIVPOCOST_DIV3ST_S75-302STSTQUMAFetched: 11/1/2026