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yy <br />'9135 i <br />-913:• <br />_ naTr; <br />-n' <br />a <br />LEGEND: <br />30 0 <br />30 80 90 FEET <br />L—u_u I I I I <br />GRAPHIC C .A <br />— — EXISTING BOUNDARY <br />PROPOSED 12" MNDOT CLASS V. <br />AGGREGATE BASE <br />PROPOSED CHAIN LINK FENCE <br />-- - EXISTING 2 -FT CONTOUR <br />PROPOSED 2 -FT CONTOUR <br />PROPOSED SPOT ELEVATION <br />1930 G = PROPOSED GRAVEL SURFACE <br />MATCH = MATCH EXISTING GRADE <br />PROPOSED DRAINAGE ARROW <br />----TO�� PROPOSED/EXISTING DRAINAGE AREA <br />SOILS DATA <br />EXISTING SOIL: ZIMMERMAN FINE SAND, EXCESSIVELY <br />DRAINED, INFILTRATION RATE 6-201NCHES/HOUR. <br />61NCHESHOUR USED IN DRAINAGE ANALYSIS <br />RUNOFF SUMMARY <br />DRAINAGE AREA ID DRAINAGE AREA (SO. FT) IMPERVIOUS AREA (SO. FT) DESCRIPTION <br />E1 30,262 0 EXISTING UNCONTROLLED RUNOFF <br />DRAINAGE AREA ID DRAINAGE AREA ISO. FT.) IMPERVIOUS AREA ISO FT) DESCRIPTION <br />P1 <br />CFS DISCHARGE COMPARISON <br />STORM EVENT EXISTING SITE PROPOSED SITE <br />2 -YEAR 0 0 <br />10 -YEAR 0.13 0 <br />100 -YEAR 072 0.66 <br />MPCA - 1.1 INCH EVENT PRODUCES NO OUTFLOW FROM <br />BASIN, INFILTRATING ENTIRE AMOUNT OF NEW <br />IMPERVIOUS SURFACEA. <br />NOTE: HYDROCAD MODEL, UTILIZED A CN OF 98 FOR <br />PROPOSED GRAVEL SURFACE. ALLOWING FOR FUTURE <br />PAVING OF THE LOT WITH NO CHANGE TO PONDING <br />REQUIREMENTS <br />TO <br />ERICKSON <br />CIVIL <br />33:1 North Naia Street Suite 201 <br />Stille'ate, Mi—um 5,5092 <br />Phane (612) 309.1914 <br />—w-ericksonc icilsite.com <br />al.R..N.T.111M.N <br />SE: <br />EW <br />IEWNTUCTIONUMENT <br />PHEREBV CERTIFY THAT THIS <br />IAN, SPECIFICATION OR <br />REPORT WAS PREPAREp <br />,,W <br />OR UM)ER AIY pRECT <br />SUPERVISION AND THAT I AN A <br />ONLY LICENSED PROFESSIONAL <br />ENGINE- THE LAWS OF <br />TFIE `TEO�F/MM.� <br />T DDA ERIC�KSON, PE <br />40418 <br />LICENSE NO. <br />02/04/2015 <br />FVTE' <br />ZZO <br />LLI <br />- -i Z <br />W m Z <br />UZ� <br />Z Y W <br />� N Y <br />rn W <br />Q <br />fr 0 Q <br />O w m � <br />jj�C9_jw <br />— Q Q Z <br />W M Z <br />>0�� <br />(n <br />Z o W <br />�WZ> <br />O ' <br />`I Orn W <br />IL <br />z <br />F <br />it <br />y <br />0 <br />z <br />O <br />S <br />z <br />Ica No. 14-175 <br />—may. JSR <br />oEa¢D er TAE <br />SHEET TITLE <br />DRAINAGE PLAN <br />7§SH <br />iEET <br />