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Article 4: Overlay Zoning Districts <br /> Section 4.2: Watershed Protection <br /> <br /> <br />Orange County, North Carolina – Unified Development Ordinance Page 4-9 <br /> <br />TABLE 4.2.6: IMPERVIOUS SURFACE/DETENTION POND REQUIREMENTS <br />DISTRICT IMPERVIOUS SURFACE/DETENTION POND REQUIREMENTS (NON-RESIDENTIAL) <br />UNIV-CA <br />CANE-CA <br />5-acre minimum lot size, with potential of up to five lots as small as two acres for lots of record September 1, <br />2015 (University Lake) or October 19, 1999 (Cane Creek); AND <br />6% impervious surface limit. <br />[1], [2] BMPs cannot be used to satisfy watershed impervious surface requirements. <br />U-ENO-CA <br />2-acre minimum lot size AND <br />6% impervious surface limit. [1], [2] <br /> <br />UNIV-PW <br />CANE-PW <br />5-acre minimum lot size with potential of up to five lots as small as two acres for lots of record September 1, 2015 <br />(University Lake) or October 19, 1999 (Cane Creek) (Amended 10-19-99); AND <br />50% ISR for all fire stations and solid waste collection centers; AND <br />12% ISR for all other non-residential uses; AND <br />on-site infiltration of the first inch of stormwater runoff; AND <br />a limit of 1.0% of the watershed for non-residential use (139 acres in CANE-PW). <br />[1], [2[ BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> <br />LITTLE-PW <br />2-acre minimum lot size AND <br />50% ISR for all fire stations and solid waste collection centers; AND <br />12% ISR for all other non-residential uses; AND <br />on-site infiltration of the first inch of stormwater runoff; AND <br />a limit of 1.0% of the watershed for non-residential use (406 acres in LITTLE-PW). <br />[1], [2] BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> <br />U-ENO-PW <br />BACK-PW <br />70% <br />ISR in Economic Development, Commercial and/or Commercial- Industrial Nodes as designated in the Land Use <br />Element of the Comprehensive Plan (high-density option) with structural BMPs if ISR > exceeds 12%; AND <br />50% ISR for all fire stations and solid waste collection centers outside of Commercial and/or Commercial- <br />Industrial Nodes as designated in the Land Use Element of the Comprehensive Plan, with structural BMPs if ISR <br />> exceeds 12%; AND <br />12% ISR for all other non-residential uses outside of Commercial and/or Commercial-Industrial Nodes as <br />designated in the Land Use Element of the Comprehensive Plan (* BMPs cannot be used to satisfy watershed <br />impervious surface requirements); AND <br />on-site infiltration of the first inch of stormwater runoff; AND <br />A limit of 1,151 acres of non-residential use throughout U-ENO-PW (5.0%) and 163 acres throughout BACK-PW <br />(1%). [1], [2] <br /> <br />HYCO-PW <br />FLAT-PW <br />50% ISR for all fire stations and solid waste collection centers; AND <br />12% ISR for all other non-residential uses; AND <br />on-site infiltration of the first inch of stormwater runoff;AND <br />limit of 1% of the watershed for non-residential use (37 acres in HYCO-PW, 66 acres in FLAT-PW). <br />[1], [2] BMPs cannot be used to satisfy watershed impervious surface requirements. <br /> <br />L-ENO-PW <br />70% impervious surface, with structural BMPs required when impervious surface exceeds: <br />24% (w/ curb and gutter); or <br />36% (w/o curb and gutter). [1], [2] <br /> <br />57