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Proposed Drainage Exhibit 07-15-22
880 8 8 0 885 8 8 5 878 878878879 879881881 882 882883883 884 884886 886 887 8 8 7 8 8 8 888 889 88 9 877888887 886 885 884 883 886887888889890881 882883884 885 886 887 888 889890 880881882 883 88 4 885 886 887 888 889 885 884 8878 8 3 885885 884 883 884 882 881 887 886 8 8 4 OCS-2 RE:883.51 IE:881.50 S ST-4 FES 12" IE:881.00 N 27 LF - 12" @ 1.86% BMP#1 AND 2 - PROPOSED PRETREATMENT SWALE WITH NATIVE GRASS MIX AND MAIN ROCK CHANNEL WITH ROCK DITCH CHECK DITCH CHECK OVERFLOW: TBD BMP#3 - PROPOSED INFILTRATION BASIN/RAIN GARDEN. HWL: 883.66 BOTTOM: 883.00 TOP: 884.512.70%1.77%2.71%3.35% 8 . 0 9% 9. 4 7 % NORTH EXISTING STORM SEWER PROPERTY LINE EXISTING CONTOUR LEGEND 0.0%EXISTING DRAINAGE DIRECTION EXISTING STORM MANHOLE (SOLID CASTING) EXISTING STORM MANHOLE/ CATCH BASIN (CURB INLET CASTING) EXISTING FLARED END SECTION EXISTING DRAINAGE DIVIDE SHEET NO. DATE: PROPOSED DRAINAGE EXHIBIT EX-2 METRONET COMMUNICATIONS SHELTER CHANHASSEN, MN 07/15/2022 DRAINAGE AREA SUMMARY DRAINAGE AREA PERVIOUS (SF) IMPERVIOUS (SF) TOTAL (SF) DA-1 3,887 4,148 8,035 DA-2A 332 1,810 2,142 DA-2B 1,761 3,445 5,206 DA-2C 3,656 0 3,656 TOTAL 9,636 9,403 19,039