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HomeMy WebLinkAboutWPO201400064 Plan - As-built Stormwater Management Plan 2020-03-16WW & ASSOCIATES DESIGN STAGE STORAGE DATA Planned Pond Storage Volume WW & Associates No Elevation (ft) Area (sq. ft) Ave Area (sq. ft) Volume (cu. Ft) Cumulative (cu. Ft) 1 471.99 0.00 0.00 0.00 0.00 2 472.00 7179.00 3589.50 35.89 35.89 3 474.00 8643.00 7911.00 15822.00 15857.90 4 476.00 10208.00 9425.50 18851.00 34708.90 5 478.00 11873.00 11040.50 22081.00 56789.90 6 480.00 15735.00 13804.00 27608.00 84397.90 7 482.00 18423.00 17079.00 34158.00 118555.90 WW & ASSOCIATES DESIGN CROSS SECTION WITH AS -BUILT CHANGES NOTE: ALL RCP PIPE CONNECTIONS FOR RISER STRUCTURE GASKET AND WATER TIGH7. 490 485 480 475 470 465 NQ Q ?FALL PIPE HALL BE R BBER k,5� �'- Clor nl �� I O � �r SEfTL D TOP OF PABANKIPENT EL. = 43MG WIDTH = 1 ,7' f f 1 3-Yk VISE=4- f 2 YR W E=47 N RO GH GRADE LANS - - IN 6N8"x f 1317WEEN .TALL PREC r --PROVIDE HALF- 12" ES-1 3" P RFDF2 TE0 0 CONCRETE CRAI7 E SEE DRAWING C 37 Fl L BAS SEC ION WITH CLITO F TR NCH CONCREY T4 I AATCH { PIPE INV RTS. 1 0-84 F J-1� CL III ASTl -351 IN TALL DOT o. 57 w tr GA5 ETD IPE 03 in - U DER ISER ECTIO - z: - � RCP 0 u; o Q PTH=12 + + � fl ESL PE 4 _ 24 LiII o II n Cn 0 U') 10+00 I 10+50 1 1 +00 I 1 1 +50 79.96 9.38 [.14 GALVANIZED PLATES SST RISER SECTIONS RISER JOINT) 5LCTION DEBRIS HOOD T -8t) 477.33'. ?IF10E PIPE 2.5 ORIFICE TO BE 472.00' IF THIS DRAWING IS A REDUCTION GRAPHIC SCALE MUST BE USED INSTALLED WITH TRASH RACK Table 12: Water Ouality Complance table II WATER QUALITY COMPLIANCE project area 41 _I I '.(should be rotlgh;y equal to limits of disturbance) area capture �48-6 percent captures 8011f45 7(should be 90% Ur better) f, factor � 1.0 7'(1,0. or 0.9 for sites in the development areas here existing irnpef�iaus comer is greater than Crest Bev = 480.03' 1299X+7F�99 Orifice E ev = 477.33' 12" 2.50" Orifice Modified EW-1 12% 12" x 12" 1.5' Trash Rack See Detail This Sheet Bottom Elev = 372.03' 0.5' Inv=472.03' 6" OF #3 2.5' Gravel Embed 6" in Concrete Pond Embankment CMP Anti -Vortex Device 48"RCP Standpipe 12" n v= 472. 03' } $HAPE ra BIE - BEVELED ---- ---- 117TH MORTAR' I FLOW x �- -�------------ - DO NOT a INVERT =- - - - - - L NOTES; I. "H" 6AAV BE REUUCM LINTIL "x" REACHES A MINIAW OF 4" WHERE �NDWA�LL WOULD PROTRUIX AWVE SHOULDER LI�. IN NO CASE SKkL TGP OF EHDWALL PROJECT MOVE F,LL SLOPE, WCH 5LPI` O, OR SHOULDER. 2, THIS ITEM MM 9E PRECAST OR CAST IN PLACE. 3. ALL CAST IN PLAICE CONCRETE TO BE CLASS A3. FOR PRECAST SEE $I1EET 101.02- 4, TEAS 51mil) tiRp TO RE USED vnTH STRAIGHT CROSSINGS AID ALL SKEM10'TO 45•). 5, HCADWALL tO eE I3EVUE4 IN ALL ARCA5 I XCEPt WHERE A COWLICT WITH INVERT, EW-1 ENDWALL FOR CIRCULAR PIPE afAmEYER OF PIPE CULVERT 12" IS" 1&" 2r OR 24" 7' OR 3b' 3' OR 36 A 0,,6„ O'-s" 0,,9� 0'•11" 11.0- r-O.. a O•-tr' r r' T-�, T-fi" C r-4" 1' 7" )`-9"._ 2•.0, 2`-9" ID r-0" F-3.. 1,-$" 2._4„ 2..0., 3' F VIY L 4'•D" 51_W1 W-O" 6•-0" V..W. 12'-0" 0 U` t/s' D •1 i" 0 -2" W-2v .. 0 =3�%4" b'-3y . b 0`-r` 01-VA D-0/2- 4�2" IY-2'1�` CUDC YARDS OF OFWRETE CONC. PIPE 0-241 D.492 0.697 1.379 2,067 2.94T �.LL PVE 0-2$7 O.S21 D.739 1-3 ?-In-In3-F46 f J 0 8 BEVEL EDGE 15 FIEWRIED ON THE HEADWALL AT TI-If *LET END OF THE C kVERt rwHERE TIE FLOW ENTERS THE CUL ERn, 7- kWADwALL At THE GuTLtt Q71p OF TW CULVE3xt YAY E3E EITHER SQUARE EDGE OR 6EWL EDGE 8. ON { LOW FILLS WHERE ENUWALLS ARE 1 ' pq LESS 9ELOW SWULDER LW-. TIE TOP OF tHE ENDwaLL SHALL B€ CONSTRuCT€D PARALLEL TO THE GRADE OF THE RQOQ. 9 Fj" CHAMFER MAY 9E PROVT]ED DR ALL EDGES AT WANLFACTI-RER1, OPTION. MIA ENDWALL FOR ELLIPT[GA,1_ PIPE SIZE OF ELLIPTICAL PIPE CULVERT c5PAm r RISE] 23"9T4- 30"ArW' 34-' 22" 38"x24" 42-47" 45"K29^ 40"�32" sa"04" A, (I.. a.. -x•5r 0' 1C" O'•11" 01•1Y- 1'•D-' 1'•0" r-0" 15 1' 2 1'-5r 1"E", I'-5•' 1•-9-' 1'-1D" 1~-?r' 1' II' C 1'-B" 1'-tr 2.-1„ 2,_;„ T-7-- 21-41 2.19.. a 1'-2" T-7" 1''70" Y•-0" 2.-3.. 2,... $ 21�« 2'-10" F 0'-d" 0'-6` or-9m 0`-9'" 0'-9" 0'-Ig" 0'-V 0'-.B" Yi 2•-t0" Y-J` 3`-7" 3'-9" 4•-0" 4'-2e 4'-5" +' 7'• L 5'-S" 7'-2.` &' 9'-3" 10'-2" 10`-tr' 12'-1" 12'-11" S r n" 2'-.�5" 2'-ib" 3'=2„ 3'-6" 3 9" 4'-1- 1-5" a U`-2ye 0--a 0'-3'/a" 0'-4" W-41/2 4`-4W O'-5- O.44.„ b O'-2" 0'-2'/t" O'-2Y`4" G' k 0'-3 t' D.-3:Yj. D'-4- 0,,#1/4„ CUUIC WOWS OF GCOI RETE cow-P D,547 U-$$ 1.2-M L50p L611 :z_1W 23 2-Mi R SMCFXATON A DOPY OF THE OMUNAL 55AUD AND SIGNf.DrtA pYlIN13 IS ON FILE IN THE CENTRAL {3FPICE, VE7©T' T AN D Ali D E N D I ALL FOR PIPE U L V E F T ROAD AND BRIDLE $TMIDAI0$ 105 12" - 36" CIRCULAR AND 23" x 14" - 53" x 34 ELLIPTICAL PIPES REVISION QAT� SHEET 1 OF 1 302 VVFMIA BEIPAPTMENT OF TRAN$Pt*TATJGN 04/99 HTL01 L 3.0' 2.5" EXTENDED DETETION 30 HOUR DRAWDOWN Inv 472.03' 1.5' 0.5' MODIFIED EWV I NOT TO SCALE Top of Dam E ev = 482, 50' 100, 61 '- 2499 RCP @ 0,67� 6" OF #3 STONE �ALTH of tee �o , O U� y Dustin E. Greene Lic. No. �4) 55833 �syw �SSr0NAL �1�1 1 1 1 �1 •1 ■ +O O TREE \ TREE \ +"QFE_-____JJBE-_�..� - T_RE� TREE—+ )�QE + TREE- E \ TREE` / 7\ ;/z Fxpanded Steel Grate Opening Detail Not To Scale 2.5 2.28' 1.03' .203" 3.0 3.44• .940" .264 �,6 HOLES AS SHOWN LD (TYP.) -1 1/2- X 1 1/2- X 1/4- STEEL ANGLE (TYP.) -1 1/2" X 1/4- STEEL STOCK WELDED TO BASE AS SHOWN GENERAL NOTES FOR TRASH RACK STEEL TO CONFORM TO ASTM A-36. ALL SURFACES OF TRASH RACK(S) MUST BE HOT DIPPED GALVANIZED AFTER FABRICATION. TRASH RACK(S) TO BE FASTENED TO WALL WITH 1/2- MASONRY ANCHORS. TRASH RACK(S) TO BE REMOVABLE. TRASH RACK(S) TO BE CENTERED HORIZONTALLY OVER THE OPENING. FABRICATOR MAY MODIFY COMPONENTS OF TRASH RACK FRAME TO IMPROVE CONSTRUCTABILITY OF TRASH RACK. MODIFICATIONS MUST BE APPROVED BY MCDPS PRIOR TO FABRICATION. * DETAIL TAKEN FROM MONTGOMERY COUNTY, MARYLAND WATER RESOURCES SPECIFICATIONS. CONTRACTOR TO USE THIS TRASH RACK ' OR AN EQUIVALENT APPROVED BY THE VSMP Inv = 4 71.3 6 AUTHORITY. ORIFICE TRASH RACK NOT TO SCALE Dewatering Orifice Spreadsheet A = Flow area of orifice, ft2 d = diameter of circular orifice in, ft h = average driving head (height from Principal Spillway to orifice divided by 2), ft Q = volumetric flowrate needed for intended drawdown, ft3/s S = Storage or WQV required, ft3 h = 5.33 ft Q = 0.40 ft3/s 43072 ft 3 WQV provided S = 43072 ft 3 108,000 s 30 hours A= Q (64.32 * h)112 * (0.6) A = 0.036 ft2 d = 2* (A/3.14)AO.5 d = 0.21 ft d = 2.57 inches a U Ct ..W o 8 J m CL N 0 Uo 0° gIlttu 5p� 00 �Z Con Q rz � 2 00) W� Q UQOW .12 � 0 rn� a0 WVI Q W ^� LL2 OJIL OC O[ V C9 (6 4W �9 1` Q y W W 4 W �\ Z V = Z a O REVISIONS DATE MAR. 16, 2020 -11 SCALE 111-20' FILE NUMBER 10.0156 SHEET 1 OF 1 AS -BUILT CONCRETE RISER STRUCTURE DETAIL