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Article 4: Overlay Zoning Distrix <br /> Section 4.2: Watershed Protection <br /> 4.2.5 Impervious Surface and Detention pnnd98 Requirements for Residential Uses <br /> TABLE 4.2.5.1: IMPERVIOUS SURFACE REQmEmEws (RESIDENTIAL) <br /> DISTRICT IMPERVIOUS SURFACE REQUIREMENTS (RESIDENTIAL) <br /> 6% impervious surface limit. <br /> EXCEPT for all lots which exsted priorto 4/2/90,which are subjectto impervious surface <br /> limits as provided in the following Table(entitled Sliding Scale for Residential Impervious <br /> UNIV-CA Surface Ratios—Univ, Cane,and Little).[1], [2] <br /> UNIV-PW Lots shall eitherbea minimumof2 acres in area,exclusive of any right-of-way or access <br /> easement,orcreated in accordance with established density regulations through the <br /> subdivision process to qualifyfor additional impervious surface allocation as detailed in <br /> Section 4.2.8(C). <br /> 6% impervious surface limit. <br /> EXCEPT for lots smaller than two acres which existed prior to 1/1/94,which are subjectto <br /> impervious surface limits as provided in the following Table(entitled Sliding Scale for <br /> CANE-CA Residential Impervious Surface Ratios—Univ,Cane,and Little).[1], [2] <br /> CANE-PW Lots shall either be a m inim um of 2 acres in area,exclusive of any right-of-way or access <br /> easement,or created in accordance with established density regulations through the <br /> subdivision process to qualifyfor additional im pervious s urface allocation as detailed in <br /> Section 4.2.8(C). <br /> 6% impervious surface limit. <br /> U-ENO-CA EXCEPT for lots smaller than five acres which existed prior to 6/1/2010,which are subject <br /> to impervious surface limits as provided in the following Table(entitled Sliding Scale for <br /> Residential lm pervious Surface Ratios—Upper Eno). [1], [2] <br /> 6% impervious surface limit. <br /> EXCEPT for lots which existed priorto 1/1/94,which are subjectto impervious surface <br /> limits as provided in the following Table(entitled Sliding Scale for Residential Impervious <br /> LITTLE-PW Surface Ratios-Univ, Cane,and Little). [1], [2] <br /> Lots shall either be a m inim um of acres in area,exclusive of any right-of-way or access <br /> easement,orcreated in accordance with established density regulations through the <br /> subdivision process to qualifyfor additional im pervious surface allocation as detailed in <br /> Section 4.2.8(C). <br /> FLAT-PW 12%im pervious surface lim itfor new and existing lots. [1], [2] <br /> HYCO-PW <br /> 12%impervious surface limitforexisting and new lots outside of Transition Areas as <br /> designated in the Orange County Land Use Plan. [1], [2] <br /> 30%impervious surface limitfordevelopments which exceed adensity1 du/acrewithin <br /> U-ENO-PW Transition Areas as designated in the Orange County Land Use Plan. Stormwater <br /> BACK-PW ManagementPlans(SMPs)and/or StormwaterCsontrolMn}easures(SCMs)are required <br /> if impervious surface exceeds 12%. <br /> 70%im pervious surface lim itfor residential uses developed at"high intensity'densities <br /> (R-5,R-8,and R-13)in an Economic Development Districtas designated in the Land Use <br /> Elementof the Comprehensive Plan(high-densityoption)with SCMs if ISR exceeds12%. <br /> 24%impervious surface limitwith curb and gutter. <br /> 36%impervious surface limitwithoutcurb and gutter. <br /> [1], [2] <br /> 70%impervious surface limitfor residential uses developed at"high intensity'densities <br /> L-ENO-PW (R-5,R-8,and R-13)in an Economic Development Districtas designated in the Land Use <br /> Elementof the Comprehensive Plan(high-densityoption),with Stormwater Management <br /> Plans SMPs)and/or Stormwater Control Measures(SCMsjrequired when impervious <br /> surface exceeds: <br /> 24%(w/curb and gutter);or <br /> 36%(w/o curb and gutter). <br /> HAW-PW 24%impervious surface limit. [1], [2] <br /> JORDAN-PW <br /> [11 Allowable impervious surface area maybe modified in accordance with Section 4.2.8 of the UDO. <br /> 98 Removed reference to"Detention Ponds"as that language isirrelevantandmisleadingtoreaders. <br /> 99 Removed reference to"Detention Ponds"as that language isirrelevantand misleadingtoreaders. <br /> 100 Removed reference to"Detention Ponds"as that language is irrelevantand misleadingto readers. <br /> Orange County, North Carolina— Unified Development Ordinance Page 4-7 <br />