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Article 6: Development Standards 113 <br /> Section 6.14: Stormwater Management <br /> 6.14.76.14.8 Peak Runoff Volume <br /> (A) Standards for Falls Lake Watershed <br /> (1) For all new development, there shall be no net increase in peak flow leaving the <br /> site from the pre=development conditions for the 1_year, 24_hour storm. <br /> (B) Standards for Jordan Lake Watershed <br /> (1) For all new development there shall be no net increase greater than 10% in peak <br /> flow leaving the site from the pre=development conditions consistent with 15-A <br /> NCAC 02H.1002 (44) and the most rvurre.pt ^,^n444 of the NGDF=Q et,,, ;watef <br /> Design Mangy aI 182 <br /> (C) Calculating Peak Runoff Volume <br /> (1) The following are acceptable methodologies for computing the pre- and post- <br /> development conditions for the 1_year, 24_hour storm: <br /> (a) Rational Method, <br /> (b) Peak Discharge Method as described in the USDA Soil Conservation <br /> Service's Technical Release Number 55 (TR-55), <br /> (c) Alternative methods must be approved by the County. <br /> (2) The same method must be used for both the pre- and post-development <br /> conditions. <br /> 6.14.86.14.9 Stormwater Management Plan (SMP1183 <br /> (A) Required Approval <br /> The Erosion Control Officer shall not issue anypermits-Land Disturbing Permits <br /> LDPs 184 for new development on any land within Orange County subject to the <br /> provisions of this Section, unless and until a Stormwater Management Plan (SMP) has <br /> been reviewed and approved in accordance with Section 2.21.1 of this Ordinance. <br /> (B) Compliance with Requirements <br /> Any person engaged in new development activities as defined by this Section who fails to <br /> file a plan in accordance with this Ordinance, or who conducts any new development <br /> except in accordance with provisions of an approved Ster,, water Management pop MP <br /> shall be deemed in violation of this Ordinance. <br /> (C) Enforceable Restriction <br /> Approval of the Stormwater Management p4R MP shall require an enforceable <br /> restriction on property usage that runs with the land, such as a recorded deed restriction <br /> or protective covenants, to ensure that future development and redevelopment maintains <br /> the site consistent with the approved Stormwater Management pl nSMP. <br /> C_.A_.n_ri,_#P_.nt reference tn- ".mest current versiens"ef&-i-hchapter 02H and the NCDEQ Stermwater Design Manual <br /> 1sz Reference to 15A NCAC 02H .1002 (44) is sufficient. <br /> "'Title of Section 6.14.9 revised to include the appropriate acronym for Stormwater Management Plans(SMPs)— <br /> NOTE: "Stormwater Management Plan"and"SMP"are integrated through the remainder of Section 6.14, <br /> where applicable. <br /> 114"Land Disturbing Permits" is correctly noted to match the Definitions section of this Ordinance and the <br /> appropriate acronym for Land Disturbing Permits(LDPs) is included—NOTE: "Land Disturbing Permit"and"LDP" <br /> are integrated through the remainder of Section 6.14, where applicable. <br /> Orange County, North Carolina—Unified Development Ordinance Page 6-103 <br />