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60 Article 4: Overlay Zoning Districts <br /> Section 4.2:Watershed Protection <br /> - 4.2.6 Impervious Surface and Detention Pond Requirements for Residential Uses <br /> TABLE 4.2.5,1: IMPERVIOUS SURFACEMETENTION POND REQUIREMENTS(RESIDENTIAL) <br /> DISTRICT IMPERVIOUS SURFACEIDIETENTION POND REQUIREMENTS(RESIDENTIAL) <br /> 6%impervious surface limit. <br /> UNIV-CA EXCEPT for all lots which existed prior to 4/2/90,which are subject to impervious surface <br /> UNIV-PW limits as provided in the following Table(entitled Sliding Scale for Residential impervious <br /> Surface Ratios—Univ,Cane,and Little). <br /> [1]BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> 6%impervious surface limit. <br /> CANE-CA �XCEPT for lots smaller than'two acres which existed prior to 1/1/94,which are subject to <br /> CANE-PW impervious surface limits as provided in the following Table(entitled Sliding Scale for <br /> Residential Impervious Surface Ratios—Univ, Cane,and Little). <br /> *,13mps cannot be used to satisfy watershed impervious surface requirements. <br /> 6%impervious surface limit. <br /> EXCEPT for lots smaller than five acres which existed prior to 6/1/2010,which are subject to <br /> U-ENO-CA imperVious surface limits as provided in the following Table(entitled Sliding Scale for <br /> Residential Impervious Surface Ratios—Upper Eno). <br /> *BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> 6%impervious surface limit. <br /> EXCEPT for lots which existed prior to 1/11/94,which are subject to impervious surface limits <br /> LITTLE-PW as provided in the following Table(entitled Sliding Scale for Residential Impervious Surface <br /> Ratios-Univ,Cane,and Little). <br /> *BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> FLAT-PW 12%impervious surface limit for new and existing lots. <br /> HYCO-PW *BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> 12%impervious surface limit for existing and new lots outside of Transition Areas as <br /> designated in the Orange County Land Use Plan. <br /> [11 BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> 30%impervious surface limit for developments which exceed a density 1 dulacre within <br /> U-ENO-PW Transition Areas as designated in the Orange County Land Use Plan. Structural BMPs are <br /> BACK-PW required if impervious surface exceeds 12%. <br /> 70%impervious surface limit for residential uses developed at"high intensity"densities(R- <br /> 5, R-8, and R-13)in an Economic Development District as designated in the Land Use <br /> Element of the Comprehensive Plan(high-density option)with structural BMPs if ISR <br /> 1 0/ 69 <br /> 2 6. <br /> 24%impervious surface limit with curb and gutter. <br /> 36%impervious surface limit without curb and gutter. <br /> [1]BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> 70%impervious surface limit for residential uses developed at"high intensity"densities(R- <br /> L-ENO-PW 5, R-8, and R-13)in an Economic Development District as designated in the Land Use <br /> Element of the Comprehensive Plan(high-density option),with structural BMPs required <br /> when impervious surface exceeds: <br /> 24%(wl curb and gutter),or <br /> 70 <br /> 36%(Wo curb a d gutter). <br /> HAW-PW 1 24%impervious surface limit. <br /> 69 Impervious Surface Ratio requirements in Section 6.3.7 are suggested to be relocated to this Section ofthe UDO <br /> where other impervious surface regulations are located. Staffis suggesting that the higher impervious surface limits <br /> apply only to higher-density residential because,at this time,single-family residential is potentially allowed in the <br /> Buckhom EDD(located in the Upper Eno PW);however,staffdoes not believe that 70%impervious surface is <br /> desirable for lower density residential uses. Additionally,limiting residential uses in the Buckhorn EDD to only <br /> higher density residential on a limited basis is an anticipated work item in 2012. <br /> 70 Impervious Surface Ratio requirements in Section 6.3.7 are suggested to be relocated to this Section of the UDO <br /> where other impervious surface regulations are located. Staffis suggesting that the higher impervious surface limits <br /> apply only to higher-density residential because,at this time,single-family residential is potentially allowed in the <br /> Eno EDD(located in the Lower Eno PW);however,staffdoes not believe that 70%impervious surface is desirable <br /> for lower density residential uses. Additionally,limiting residential uses in the Eno EDD to only higher density <br /> residential on a limited basis is an anticipated work item in 2012. <br /> Orange County,North Carolina—Unified Development Ordinance Page 4-6 <br />