(A) Stormwater control measures and detention facilities in any new development shall be the entire and sole responsibility of the landowner except those natural streams, channels, ditches, branches and drainage outfall lines for which the city has accepted the responsibility for continuous maintenance.
(B) All detention facilities, SCMs, and stormwater management plans required under this chapter shall be evaluated by the Stormwater Administrator according to the policies, criteria, and information, including technical specifications and standards and the specific design criteria for each stormwater practice in the city's Manual of Standard Designs and Details (MSDD), and the state's Minimum Design Criteria (MDC), 15A NCAC 02H .1050 through .1062. The Stormwater Administrator shall determine whether proposed engineered stormwater controls will be adequate to meet the requirements of this chapter.
(C) Stormwater control measures that are designed, constructed, and maintained in accordance with the criteria and specifications in the MSDD and MDC will be presumed to meet the minimum water quality and quantity performance standards of this chapter. Whenever an applicant proposes to utilize a practice or practices not designed and constructed in accordance with the criteria and specifications in the MSDD and MDC, the applicant shall have the burden of demonstrating that the practice(s) will satisfy the minimum water quality and quantity performance standards of this chapter. The Stormwater Administrator may require the applicant to provide the documentation, calculations, and examples necessary for the Stormwater Administrator to determine whether such an affirmative showing is made.
(D) Disconnected impervious surface as defined in Chapter C-10 of the NCDEQ Stormwater Design Manual and MDC defined in 15A NCAC 02H .1060 are prohibited for use as an approved SCM for single-family developments. For other than single-family developments these SCMs must meet all required MDC in 15A NCAC 02H .1050 and .1060 as well as the following:
(1) A recorded easement on the vegetated area and maintenance access to a public right-of-way;
(2) Drawings that show any roof ridgelines and the drainage area to each SCM vegetated area;
(3) Easements and inspections shall not include the area of building gutters and downspouts;
(4) No other landscaping, equipment, fences, or improvements, with exception of subsurface utilities, are allowed within the SCM easement; and
(5) The design engineer shall certify on record drawing that the drainage area for each SCM vegetated area is per design.
(E) The Stormwater Administrator shall have the authority to disallow, limit, or include additional necessary design criteria for any type of detention facility or SCM that he or she has determined to be ineffective, unmaintainable, or unenforceable in the City of Greenville.
(Ord. No. 24-021, § 1, passed 4-11-2024)