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C:\Sdsk\Proj\3411\dwg\02-15-02 Approved Planning\3411gdp6.dwg <br />I.oJY'J,ie.vwo,.141�.14i, <br />ria n,��d eYu!'.YI.w.,ti,oxxAe 4w.i414i 1.e WJ <br />VICINITY MAP <br />EXIST. STORM MANHOLE <br />RIM: 98.97 <br />INV, OUT: 96.15 <br />INV. IN: 96.25 <br />EXISTING 12" <br />CMP STORM LINE <br />5330.10 <br />4:1 SLOPES ABO <br />BELOW DRYSTACK WALL <br />(TYP. AND MAX.) <br />5330 <br />5327.5 <br />532e <br />2% <br />SECTION A -A <br />N.T.S. <br />DRYSTACK BOULDER <br />RETAINING WALL <br />30" HIGH (MAX.) <br />(NOMINAL 0.5:1) <br />LOT 1 <br />(UNDEVELOPED) <br />d9 <br />POND BOTTOM <br />® 2% (MIN.) <br />DRYSTACK BOULDER RETAINING WALL <br />SECTION B -B <br />N.T.S. <br />RELEASE <br />STRUCTURE <br />EXISTING 10' <br />DRAINAGE EASEMENT <br />INI <br />CONCRETE PAN DETAIL <br />N.T.S. <br />LOT 2 <br />(DEVELOPED) <br />LOTS 15 <br />11 111 11 4, ,1 .Illi,.. l <br />1 11 ., 4 . J Ilei .I.'.LhII,!,!11,1,IuC 1 ..IY.JWIII!!!. tulleLLYl,ll.,61,,C,1 Ii,L, JCI1J wa.Wl'J4„ u�,lll Yl, WiWh:e l4111,C, <br />Ll.d l le„u J,,.0 1.41 L' luta' <br />uNIWWI,1,1,1 4I <br />INNOVATIVE OPENINGS <br />GRADING AND DRAINAGE PLAN <br />and 16, COLORADO TECHNOLOGICAL CENTER, FIRST FILING, SW 1/4 OF SECTION 16, T1 S, R69W, 6TH P. A. <br />CITY OF LOUISVILLE, BOULDER COUNTY, COLORADO <br />2.02 ACRES, MORE OR LESS <br />INSTALL <br />3 CURB <br />OPENING <br />64 <br />18"0 RCP <br />TO BUILDING l(REMO TO <br />I 'FUTURE' CURB AN9 GUTTER <br />I AT LATER TIME) / <br />LOT 15 <br />1.04 AC <br />veR- <br />LOT 17 <br />(DEVELOPED) <br />CO <br />I‘r I <br />t --------/---- <br />t t <br />t 1 __ <br />it <br />A .1, <br />ir- T1 <br />li <br />14) <br />3.0:6 HOLE <br />12" <br />BOTH WAYS (TYP.) <br />LOT 14 <br />(DEVELOPED) <br />100 -YR WSEL <br />5330.42 <br />EXIST. INLET <br />FL GRATE: 5328.60 <br />LOT 16 <br />0.98 AC <br />F.F. = 5333.20 <br />INSTALL <br />2' CURB <br />OPENIN <br />ToP <br />TYPE 2 VER1_CAL C. RB <br />RESURFACE/REPLACE <br />77.78 SY EXIST. ASPHALT <br />SURFACE <br />INSTALL <br />3' CURB <br />OPENING <br />NEENAH <br />TRASH RACK <br />INSTALL <br />1.6 CY EARTH TONED <br />TYPE VL RIP RAP <br />(12.5' I x 4.5' w) <br />(PLACE ABOVE/BELOW <br />ROCK WALL) <br />INSTALL <br />30- (MAX.) HIGH DRYSTACK <br />BOULDER RETAINING WALL <br />ALONG PERIMETER OF POND <br />BOTTOM ELEV.: 5327.50 <br />IN TA <br />4.4 CY EARTH TONED <br />TYPE VL RIP RAP <br />(20' I x 8' w) <br />(PLACE ABOVE/BELOW <br />ROCK WALL) <br />REMOVE AND WASTE <br />CUll HEAD <br />REP CE 2 65 LF <br />\CUR HEAD <br />.2' SPILL <br />PAN <br />EXIST. ELEC. <br />TRANSFORMER <br />INSTALL CLOSE <br />MECH GRATE IN <br />ACCORDANCE WITH <br />CDOH STD. M-604-10 <br />GRADE BOX INTO SLOPE WITH j <br />MINIMUM OF 6" EXPOSURE <br />18"0 RCP <br />#4 REBAR ON 12" CENTERS <br />BOTHWAYS (TYP.) <br />EL 5324.90 <br />CONCRETE OUTLET STRUCTURE <br />WITH CLOSE MESH INLET GRATE <br />INSTALL <br />DETENTION POND RELEASE <br />STRUCTURE <br />(SEE DETAIL) <br />FL GRATE\ 5329.49 <br />0 EXISTING 14' <br />0 UTILITY EASEMENT <br />210.0 <br />ZA <br />Ul <br />-4 <br />INSTALL <br />12' WIDE EMERGENCY <br />• OVERFLOW <br />(SEE DETAIL) <br />• <br />INSTALL <br />STMH-1 <br />RIM: 5329.90 <br />INV. IN(W): 5325.30 <br />INV. OUT: 5325.20 <br />(MH 30' NORTH OF <br />PIERCE STREET <br />EXISTING 8" \NA, <br />AvEmENT <br />12E 2 VERTICAL CURB <br />CONCRETE <br />1" <br />6" VERTICAL CURB (CATCH PAN) <br />0002.10 <br />EXIST. SMH <br />RIM: 5330.36 <br />INV.: 5318.17 <br />4 1/2" 1.0' <br />1 1/27R <br />1" <br />16" <br />6" VERTICAL CURB (SPILL PAN) <br />DRAINAGE LEGEND <br />BASIN AREA (ACRES) <br />DESIGN POINT <br />EXISTING <br />12.5' TYPE R INLET <br />RIM: 5329.40 <br />FL: 5328.70 <br />INV. OUT: 5324.98 <br />SPOT ELEVATIONS W/DISCRIPTION <br />HP (HIGH POINT) <br />TOP (TOP OF POND) <br />SURFACE DRAINAGE <br />FLOW DIRECTION <br />'UNDERGROUND' PIPE <br />FLOW DIRECTION <br />BASIN BOUNDRY <br />10 -YEAR RUNOFF COEFFICENT <br />100 -YEAR RUNOFF COEFFICENT <br />EXISTING <br />5' TYPE R INLET <br />RIM: 5329.42 <br />FL: 5328.66 <br />INV. OUT: 5324.98 <br />3.0"0 HOLE W/NEENAH <br />TRASH RACK <br />EL 5325.45 <br />EL 5325.40 <br />5.x5' APRON <br />W/TRASH RACK <br />DETENTION POND A <br />ELEVATION (FT.) ACCUMULATIVE VOLUME (C.F.) <br />5325.40 <br />5326.00 <br />5327.00 <br />5328.00 <br />5328.95 <br />5329.00 <br />5330.00 <br />5330.42 <br />5331.00 <br />0 <br />104 <br />769 <br />2019 <br />3508 <= 10 -YEAR VOLUME <br />3585 <br />5247 <br />6864 <= 100 -YEAR VOLUME <br />9132 TOP OF POND <br />ALLOWABLE RELEASE RATES <br />Q100 = 0.46 CFS <br />12' <br />W/ BURIED <br />5331.20 _ TYPE VL <br />ELEVATION <br />• <br />INSTALL <br />19.80 LF 18- CL -III RCP <br />INV. IN: 5325.40 <br />INV. OUT: 5325.30 <br />DRAINAGE SUMMARY TABLE <br />BASIN AREA (ac) <br />Nw <br />Nm <br />Ne <br />1.09 <br />0.93 <br />0.644 <br />0.378 <br />0.064 <br />0.93 <br />HISTORIC (cfs) <br />10 -YR 100 -YR <br />1.19 3.79 <br />4.36 7.53 <br />DETENTION <br />POND <br />12' EMERGENCY OVERFLOW <br />5331.20 <br />5330.75 <br />ELEVATION <br />EXIST. SMH <br />RIM: 5329.94 <br />INV.: 5319.88 <br />DEVELOPED (cfs) <br />10 -YR 100 -YR <br />2.67 <br />1.69 <br />0.30 <br />4.36 <br />4.56 <br />2.88 <br />0.52 <br />7.53 <br />TYPE VL <br />2 <br />1 <br />12' <br />0.5' <br />co <br />-0.5' <br />RIP <br />NO. <br />RAP <br />(OR APPROVED EQUAL) <br />N.T.S. <br />02/15/02 <br />12/03/01 <br />DATE <br />JOB NO <br />341-1 <br />ORIGINAL SCALE: 1"=20' <br />FINAL PLANNING SUBMITTAL <br />TYPE II <br />BEDDING <br />dsm <br />CITY COMMENTS dated 11/14-16/01 dsm <br />DESCRIPTION BY <br />PARK ENGINEERING <br />CONSULTANTS <br />420 21ST AVENUE, SUITE ' 01 <br />LONGMONT CO. 80501 (303)651-6626 <br />INNOVATIVE OPENINGS <br />GRADING AND DRAINAGE PLAN <br />DATE <br />10/16 /01 <br />I CAD NO <br />3411gdp6 <br />iSH IT NO <br />3 OF <br />