5.4.22 Planning Board Packet - Laserfiche WebLink

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Article 6: Development Standards 87 Section 6.14: Stormwater Management (1) For all new development, there shall be no net increase in peak flow leaving the site from the pre-development conditions for the 1_year, 24_hour storm. (B) Standards for Jordan Lake Watershed (1) For all new development there shall be no net increase greater than 10% in peak flow leaving the site from the pre-development conditions consistent with 15-A NCAC 02H.1002 (44) and the most current"orsmon4-70 of the NODE 1 Stormwater Design Mangy a 171 (C) Calculating Peak Runoff Volume (1) The following are acceptable methodologies for computing the pre- and post- development conditions for the 1_year, 24_hour storm: (a) Rational Method, (b) Peak Discharge Method as described in the USDA Soil Conservation Service's Technical Release Number 55 (TR-55), (c) Alternative methods must be approved by the County. (2) The same method must be used for both the pre- and post-development conditions. 6.14.9 Stormwater Management Plan (SMP)172 (A) Required Approval The Erosion Control Officer shall not issue any permits Land Disturbing Permits LDPs 173 for new development on any land within Orange County subject to the provisions of this Section, unless and until a Stormwater Management Plan SMP has been reviewed and approved in accordance with Section 2.21.1 of this Ordinance. (B) Compliance with Requirements Any person engaged in new development activities as defined by this Section who fails to file a plan in accordance with this Ordinance, or who conducts any new development except in accordance with provisions of an approved St„rr.water Management pla- SMP shall be deemed in violation of this Ordinance. (C) Enforceable Restriction Approval of the Stormwater Management pl nSMP shall require an enforceable restriction on property usage that runs with the land, such as a recorded deed restriction or protective covenants, to ensure that future development and redevelopment maintains the site consistent with the approved Stormwater Management planSMP. 6.14.10 Operation and Maintenance of Stormwater Control Measures (SCMs) (A) P^ f-Performance GuaranteesFina Giial Se,....:+.,for SCMs114 See Section 6.22 of this Ordinance for crna o+A-n.Jords ! n4-&G &ApprovaI of the SMP shall be conditioned on the posting of an SCM Performance Guarantee in accordance 171 Reference to 15A NCAC 02H .1002 (44) is sufficient. "'Title of Section 6.14.9 revised to include the appropriate acronym for Stormwater Management Plans(SMPs)— NOTE. "Stormwater Management Plan"and"SMP"are integrated through the remainder of Section 6.14, where applicable. 173"Land Disturbing Permits" is correctly noted to match the Definitions section of this Ordinance and the appropriate acronym for Land Disturbing Permits(LDPs) is included—NOTE: "Land Disturbing Permit"and"LDP" are integrated through the remainder of Section 6.14, where applicable. "I Clarification that posting of financial security is specific to"SCMs"only. Orange County, North Carolina—Unified Development Ordinance Page 6-103