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- <br /> i RIANGLE J COUNCIL OF GOVLRNME :1 <br /> • IDO PARK DRAT P.O. B0\ 12270 RI:SI-ARt'II TRI:\\G1.1- I' RK. \C' r7ut, rIl.,1:-3'i.ua+1 <br /> O$C FALLS/JORDAN LAKES PROTECTION THROUGH UNIFORM LOCAL GUIDELINES ' <br /> February 9, 1984 <br /> 1 . WATERSHED-W1DE GUIDELINES - NRCD guidance included recommendations <br /> for stormwater control and stream buffers that would apply throughout <br /> the Falls and Jordan watersheds. <br /> A. Stormwater Management - For all new development, control the <br /> first i inch of stormwater runoff from all impervious areas. . <br /> In order of preference, stormwater control options include: <br /> • <br /> 11 Onsite infiltration through undisturbed vegetated areas. <br /> rt 2. Structural , or engineered infiltration measures such as <br /> V. ( infiltration trenches -or retention ponds that reduce the <br /> eL- <br /> In total amount of runoff. <br /> • <br /> 3J Detention structures that reduce the rate - but not the <br /> 4 r I. total amount - of runoff. <br /> (December 2 guidance from NRCD suggested that new development <br /> "-�--.� in existing urban areas (defined by mcnicipa% boundaries ) <br /> "es ) <br /> not be subject to Starr/water Management requirements and <br /> 1:::% <br /> 'impervious surface limits. Local decision makers nay <br /> wish .to reconsider that exemption in -light of the j cewic li tp <br /> suggested by this present package. ) . <br /> B. Stream Buffers (applicable in all areas) - For any new development , <br /> mSintain 50-foot vegetated buffers along both sides of all <br /> perennial streams. Minimize the direct discharge of runoff <br /> through ditches, culverts, or along roads crossing the natural <br /> buffers. - <br /> 1 . "Perennial Streams" are indicated by solid blue lines on _ <br /> USGS 7i-minute topographic maps. <br /> 2.1 Fifty foot distances would be measured from the edge of . <br /> streambanks. <br /> . . 11. WATER Q L1TY 'CRITICAL AREAS <br /> A. Purpose - To provide a special level of protection <br /> toi areas critical to the water quality of the lakes. Suggested <br /> limits on impervious coverage, stormwater control , and non- . . <br /> residential development can reduce the effects of runoff and <br /> lessen the chance of wastewater system failures and chemical <br /> • <br /> API X • BENSON • BROADWAY • CARRHUKC) • t-AK1 • C'114161 1 Itit 1 <br /> CLAY7O!u • Dt'RIIAM1 • 1•0UR OAKS • 11;VI A1'A'AKI%t • t:,tk!:1 K <br /> GOLDS7ON • HILLSBOROUGH • HOLLY SPRINt:S • 1:1 NI 1 • talt:11I1)1I1 <br /> MICRO • MORRISVILLE • PINI Lk V1.1 • PITI Stu)K() • PRIM'I IUN <br /> RALt•.1G11 • RGLLSv11_LI• • SAN!ORI) • Si 15,A • S11 1 K C'i11 / <br /> SMITHFIELD • ►'A K.L F O R F.S 7 • WI kin I I • 71 111'1 ON • <br /> CHATHAM COUNTY I• DURHAM COUNTY • 1ULI'S I ciS C'O1'S t 1 <br /> LEL COUNTY • I ORANC:! COUNTY • U+l ' •''"'.'' <br />