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0 <br />••••••..•••. <br />PROPOSED D.A <br />B (22.20 AC) <br />DRAINAGE AREA INFORMATION <br />DRAINAGE A <br />IAEA <br />AREA <br />CN <br />TC (*) <br />4 (cON <br />4 (de) <br />4e (ch) <br />4• (Na) <br />4• (00) <br />4. (4T4) <br />A <br />0.76 <br />86.1 <br />32 <br />1.0 <br />1.4 <br />1.8 <br />2.3 <br />2.8 <br />3.3 <br />B <br />25.40 <br />86.1 <br />55 <br />22.4 <br />31.6 <br />40.3 <br />53.4 <br />64.6 <br />76.5 <br />C <br />7.10 <br />86.1 <br />44 <br />7.6 <br />10.7 <br />13.7 <br />16.1 <br />21.9 <br />25.9 <br />-Ir7 <br />r <br />f <br />t <br />CUL-DEFAC ROAD (BID ALT. #3) <br />EINE2 _. f. LINE 2 -r -.0*I 2 <br />30• RCP <br />09 <br />15 <br />30" ROP 24'I <br />V <br />1 <br />• ▪ PROPOSED DA . <br />■ <br />■ <br />• • <br />8• <br />IIs-___-- <br />PROPOSED DA <br />C (5.36 AC) <br />r, <br />065 <br />•o• nom••.•....••...i itrr.•.r•a••..•.....•••••s-- <br />CAPITAL AVENUE <br />PROPOSED DRAINAGE CONDITIONS <br />THE FOLLOWING ASSUMPTIONS WERE USED FOR POST -PROJECT <br />DRAINAGE CALCULATIONS. <br />• 1110 DRAINAGE AREAS (DA) ARE ASSUMED TO BE 15X IMPERVIOUS <br />MD 855 DISTURBED PERVIOUS. <br />• ME HYDROLOGIC SOIL GROUP (050) 'C• WAS ASSUMED. <br />• APPROXIMATELY 250' OF LAND TO THE EAST OF THE PROPERTY <br />WILL DRAIN ONTO THE PROPERTY. <br />r THE OFFSITE AREA WAS ASSUMED TO BE 15X IMPERVIOUS. <br />• POST -PROJECT IMPERVIOUS SCS CURVE NUMBER (CN)r99 <br />• POST -PROJECT DISTURBED PERVIOUS (CN).134 <br />• AVERAGE POST -PROJECT (CN) -86,1 <br />• DME OF CONCENTRATION (TC) WAS CALCULATED USING THE TR -55 <br />METHOD WITHIN HYDRAFLOW HYDROGRAPHS BY. <br />• R051640OW RATE FOR EACH BASIN WAS CALCULATED USING ODER/FLOW <br />HYDIOGRAPHS BY AUTOCAD. <br />RUNOFF FROM D.A. TA' 6: t WILL CONTINUE TO DRAIN TO THE <br />EXISTING OUTLETS ALONG CAPITAL AVENUE. RUNOFF FROM THE ENTIRE <br />NORTHERN DA 'B• WILL BE ROUTED TO THE NORTHWEST CORNER OF <br />THE PROPERTY. NO DETENTION IS PROVIDED ON SITE. <br />PRE V5. POST PROJECT FLOWRATES <br />FLOW DIRECTION <br />109 -VR REFROECT <br />MHss) <br />O <br />190MRPOOT4NfCT <br />QM) <br />NORTH <br />32.5 <br />76.5 <br />SOUTH <br />29.0 <br />29.2 <br />SOUTHEAST <br />3.2 <br />0.0 <br />PROPOSED DRAINAGE PLAN <br />