Loading...
HomeMy WebLinkAboutWPO201100071 Plan - VSMP 2023-03-08PID 55-109B N/F 6135 ROCKFISH GAP, LLC DB. 4567 PG. 7 APPARENT SANITARY COLLECTION SYSTEM II 1 SANITARYMH(PLASTIC) I I TOP=68240/ I I / I\ / / 1 / / I / / I SANITARY MH (PLASTIC) TOP = 682.52 If r 1 / I J If/ I \J I� I I If I II 1 I SCALE 1"=20' 0 20' 40' STORM MANHOLE TOP = 699.57 - I I 03 I I � I I I I III BM (SPIKE) FIL TERRA I I I ELEV. = 599.96' TOP = 700.06 _ I I CONC. j I I I II I III 1� 11 1 1 1 11 I it - \ 1 1 1 OQD FEPiICE I n If I I 1\ I III v sss.lq' I I I I END SECTION �' \ . \ \\ \\ \ \\ I I I I ask 2 z-STY. BRICK j k III 1 6"PVC INV. = 692. 8, \ \ \ \ \ 1 &FRAME i OR,l,P� RETAILIOFFICE I II I I I I k69°5' \\\ \\ \\ \\ \ \\ \\ \\ \\ \ \\ \ \ \ k'°3s TAX MAP #55B-1 T 6OARD FL\NCE I O conk. BOYKINS HOLDINGS VA, LLC D.B. 5263, PG. 794 DD \ GREASE TRAPS 0 k I I I / I // // I // /l /\` ` \ I \I ` \\ \ \\ \\ 1 \\ \\ \\ \\ \ 7 \ X i i III \ I 69s.41k�0, , I I ,' l// `\ II \\ \ \\ \\ 1 \ 1 \ 1 1 \ \ 4' 11 I I \ \ \ \ \ SANITARYMANHOLE l l TOP = 699.97 1 ` I �/ / I \ \ \ \ \ 1 \ \ 4" PVC INV. OUT = 696.91 / l III II � I I i / / / I \ \ I\ I\ I \I \ \ \\ \\ \ \\ 1\ \\ \ � 165(12'FR. SHED EX. PERMANENT I I \ \I DRAINAGE ESMT. I l D.B. 4080, PG. 683 i 'r0 PON WATEl? E = 68).0' / 1 \ 6' BOAR FENCE I I \ \ \ \ \ \ \ \ \ \ 1 III ///2-16 2022 STORM MH i \ / I TOP = 698.44 I l I / / EX PERMANENT,CONC. ' / I I l (� sB0 \ t 1 \ \ 1 \ I 1 1 11 1 1 4"PVC INV. IN = 692.92 / I / / // 9RAlNAGE ESMT. / 11'<iiiy"3'k I I j \ 1 \ , 11 1 11 \ 1 , 1 1 11 1 \ 15" RCP INV. IN = 688.98 I D.B. 4006, PG, 683 15" RCP INV. OUT = 688.91 C / / BM (P NAIL) 11 1,\ \ 1 1 1 1\ ELEV. = 696.74' I I I l STORMMH l If I \ 1 1 , 1 1 1 1 L1 \ 4 TOP = 697.65 15" RCP INV. IN = 687.30 / / \ \ 1 1 \ \ 1 \ STORM MH i I I 7\Q� �, 6 80\ 1, \ \ TOP = 696.81 15" RCP INV. OUT = 687.09 , 1 \ I \ � I BOT. OFSTRUC.=681.37 /max GQ /�� / /l \I -Ilk 1 1 I I Ix �\ , of ice' ' �\\ \ \ , 1 I I I \ , 5 , i i ��,\ 1�\ \\\, I k, I I I -------\� FIL TERRA GASSHUTOFF&2 1,x- 1 X�¢�Z�1 \1 11\`\\\\;�T�� k6ss6 TOP=3zJ697------ VERT*/EntTPIPES------- WA7ER�t. 6 ZB�R' \ \ CFI 1 \ \ \ 1 \ 1 \ \ \ 15" RCP ' --12462021 -x r�686.-� r , If -rQ�--B9-- -- L24 _ --- _ , FIL TERRA O \ \\ K\\\\\\ `\\\`\�� �'3ANIT4RY-MH - �--------------_- TOP=697.87 -\ —IJ// / ///I t\ I '\II\,\\\1\\�\�� \\`TDOp-6883__—' rd O O — I / If I I \\-�TAAY_IIH — V 68s I I I _ -__ O�� IIIIIfI ® ��\� TOP�'685�87��\� \ I\ skQLEANt�UT A . TOP = 69a 53 . k681.3' \ ` \� _ — — —\� 1—l" _ — ire I JI / II \ \ \ \ \ \ N \ � 690' \ I / \ - - -- I �, \ \ \ \ \ \ \ I �� \\\ \ \ ® \\ \\ \ \ I I GRAVEL --k-/CLEANOUT/ _, - ' / \ \ \ 1 1 k6B0 ,, l tOP '690.36 \ \ \` l 1 I I I\ .690/ SAWTARYMI> \� ��• - __ �tsq_o/,__ �I// �/ __I ks I 66L 5, I \ \ \ TOP - 6645� \ \ . i , ' _ — -_- 6j4" '660 ` I k \ \ \\ ._'_------_-_-_��� ' WASTEWATER \ \ \ \ ` \ CLEANQUT _ - - , 6g5, I \ \ TREATMENT SYSTEM + IT -EX PERMANENT _ \ ' - \ SANITARY MH b � � ' i / � - � - - - - � fill- �DRAINAG'EESMT \ \ l - c - ,I \ / — kss0q, -4 - - , \ 0.8 408Q, PG. 683 \ \ I TOP = 684.14 -680- I - S80 5735"W \ 330.05' \ / �x--- -OTAL) PID 55B-3 N/F MARKLEY, MICHAEL L. D.B. 5390, PG. 353 INST. #202000012903 I I RIP T--_RAPS I \ I I I I I I � I I I I I I I I I I I I I I I I I I I I I I I I I I I I I END SECTION 15" CMP INV. = 670.17 �— WOOD FENCE PID 55B-2 N/F LANGDON, ROBERT G. D.B. 4978, PG. 232 INST. #201700012652 PID 55B-15 N/F R. A. YANCEY LUMBER CORP. D.B. 363, PG. 88 SURVEY NOTES: 1. THE BOUNDARY INFORMATION SHOWN HEREON IS BASED ON EXISTING LAND RECORDS AND A FIELD SURVEY BY TIMMONS GROUP COMPLETED ON DECEMBER 16, 2022. 2. HORIZONTAL DATUM IS BASED ON NAD83 (NA2011), VIRGINIA STATE GRID, SOUTH ZONE. VERTICAL DATUM IS BASED ON NAVD88. DATUM ESTABLISHED THROUGH NETWORK GPS (LEICA SmartNET) OBSERVATIONS. 3. BASED ON FEMA FLOOD INSURANCE RATE MAPS (FIRM), MAP NO. 51003CO237D, PANEL 237 OF 575, EFFECTIVE DATE FEBRUARY 4, 2005, THE SURVEYAREA LIES IN UNSHADED ZONE X, AREAS DETERMINED TO BE OUTSIDE THE a2% ANNUAL CHANCE FLOODPLAIN. 4. THIS SURVEY WAS PREPARED WITHOUT THE BENEFIT OFA TITLE REPORT. EASEMENTS MAY EXIST WHICH ARE NOT SHOWN HEREON. 5 THE PROPERTY INFORMATION SHOWN HEREON IS BASED ON EXISTING LAND RECORDS AND A FIELD SURVEY BY THIS FIRM BUT DOES NOT CONSTITUTE A BOUNDARY SURVEY AS DEFINED BY THE COMMONWEAL TH OF VIRGINIA. 6. CONTOUR INTERVAL = 1'. O SWM FACILITYRISER STRUCTURE DIA. = 54"(CORRUGATED METAL TOP = 679.70' INACCESSIBLE - PLATE WELDED TO TOP OF STRUCTURE APPARENT OUTFALL SOUTH OF STRUCTUREAS SHOWN 0 STORM MH TOP = 688.67 15" RCP INV. IN = 677.32 15" RCP INV. OUT = 677.28 (WATER IN STRUC.) 0 END SECTION 15" RCP INV. = 676.82 LEGEND O IRON ROD FOUND OO BOLLARD ® AIR CONDITIONER I& SATELLITE DISH DECIDUOUS TREE CONIFEROUS TREE STORM MANHOLE o ROOF DRAIN QS SANITARY MANHOLE ® CLEANOUT 0o LIGHT POLE © ELECTRIC BOX 0 IRRIGATION VALVE 0- SPIGOT CURB —x— FENCE LINE EDGE OF WATER -------------- -------- STORM PIPE — — — SAN - - SANITARY LINE BM BENCHMARK CONC. CONCRETE ESMT EASEMENT FR. FRAME TYP. TYPICAL p O � �' ; lr\.1TIL4�3�ON:41T[ Loc. N 0-7057151 A, Q?3/5/25 \,Q �ss7ON A L M E 0 0 u N � N 0 > E w v E H- w w 3 Q LL 0 3 wo 0 m 0 L f"l < Lu V so J —N M (7W NV vPIT 3:o x oa =LL ti = N =v>00 F Q N W M a� �H am O ce f H w Q 0 DATE 31312023 DRAWN BY S. KIRBY DESIGNED BY S. KIRBY CHECKED BY J. SHOWALTER I SCALE 1"=20' O U z o O U Q< vJ Z z°w J O w m co J u/) Q Q 1 z Lu 0- z G 0 w U) JOB NO. 57005 SHEET NO. SW-5 L WATER QUANTITY CALCULATIONS FOR POINT OF ANALYSIS 1 CHANNEL PROTECTION: Q AREA 1 POST < [0.8'(Q AREA 1 PRE* RVAREA 1 PRE)/RVAREA 1 POST] <- [0.8'(2.97 CFS* (0.131 AC/FT))/(0.305) AC/FT] + 0.13 + 0.70 + 0.16 CFS OK 1.95 CFS <- 2.01 CFS THE POST DEVELOPED FLOWS ARE LESS THAN THE PRE. THEREFORE, 9VAC25-870-66B IS SATISFIED THROUGH SUBSECTION #3, MEETING ENERGY BALANCE. FLOOD PROTECTION: POST -DEVELOPED Q10 <- PRE -DEVELOPED Q10 OK 11.24 CFS (POST -DEVELOPED 010) <- 13.06 CFS (PRE -DEVELOPED Q10) STORMWATER NARRATIVE: THESE NEW SHEETS ARE TO AMEND THE STORMWATER MANAGEMENT PLAN FROM THE PREVIOUSLY APPROVED WPO PLAN. THE PROJECT WAS CONSTRUCTED WITH THE UNDERGROUND DETENTION PIPES NOT INSTALLED. THE SEDIMENT BASIN IS IN PLACE AND FUNCTIONING WELL. THIS UPDATE CONVERTS THE SEDIMENT BASIN INTO A DRY POND TO MANAGE STORMWATER QUANTITY PER THE STATE REQUIREMENTS. STORMWATER QUALITY IS TO BE ADDRESSED THROUGH THE METHODOLOGY ON THE ORIGINAL PLAN. --- - - -- - - - -- - ---_ - - - -- U.S. ROUTE 250 ROCKFISH GAP TURNPIKE (110' RN\) .......:. :... ---------=--- ......... r-I I I r 1 / I --------------------------� TC: 6 MIN UNDISTURBED AREA 1 1 I - _ _ - TOTAL AREA: 0.03 1 I \� SHEET FLOW: 2.4 MIN CN:: 98 98 I I SHALLOW CONIC.: 1.3 MIN TC: 6 MIN. \ CHANNEL FLOW: 0.30 MIN J I o \�\\ UNDISTURBED AREA 2 UNDISTURBED AREA 2 TOTAL AREA: 0.61 AC. � / / I TOTAL AREA: 0.61 AC. CN: 69 I CN: 69 TC: 6 MIN. I I I TAX MAP #55B-1 / TC: 6 MIN. I BOYKINS HOLDINGS VA, LLC ♦/ D.B. 5263, PG. 794 TRANSITION FROM SHEET I I I FLOW TO SHALLOW CONC. I I ♦ PRE -DEVELOPED AREA OF / FLOW I I III I i ♦ ANALYSIS I, ♦ TOTAL AREA: 2.22 AC. ♦ IMPERVIOUS AREA: 0.12 AC. \I ♦ PERVIOUS AREA: 2.10 AC. CN: 71 1 TC: 6 MIN. I�� / l 1 / /' ,' / / /' / r : - \ ` I 1 , 1 1 1 \ 1 \ % \\ \\ \ �(,:\LTyO�, / r \ I Q� L I / I !� o�,�,�-, � / C LE 1"= V �" � �, to dd � / a / , � , , / /`// > /' \\\ \\ \\�1 1 I I \III \ \ \\ \ ,n11111� ON'.�LT[ /Z� / /�' \ \\`\ 1 \I\ II I\ \ \ \I , I\ I I 1, \ \ �I\ \\ \ L,c. � io'_0%7 15125 0*15 /25 j \ - - �0 rJUAL �/ / roI\�--// 2r@5°� S PEy / / '/ /---- \ \ \`\\�\�r\ I/ X I / // INV1N:B71.2p , / / / '�//'ram' --� �`�\I�\�\ \\\� t� ='t - __ ----- 1N1b1IT:67'1.110 / / Al,// / / // \ liy\ \\�\\\\ \\ \\�\\�� �x --xT-- /\688.� V, / , / / / X 671.5 \ \ \ \ \\ \\�\ \ \ .MODIFIED RISER _ 0 \`�\` \\ "�\\� \ 24" CULVERT: 671.00 \\` `\ \ - \ \ 6" DIA PIPE INV IN FROM POND: 671.20 //� / 1% SIyOP IT� 0 \, `\\\\\�\� \ \` \ \ \\ \�\ INV OUT TO RISER: 671.10 / // / / r I I IORI ICE 1 ' I \ 1 \ \ \ \\� \\ `\ \ 20" WIDE x 10" HIGH NOTCH: 675.50 / I X 67 I \ X 671.4 0 671.2 1' I �j l \\� \\\TOP OF RISER: 677.70 72 I I I \ \ ARMORED SPILLWAY s \BOTTOM WIDTH 5' AT 679.00. 3:1 SIDE SLOPES ARMOR WITH 18" / THICK CLASS Al RIPRAP tp REINSTj4�LTRASH RAM PER\- - - _ _ _ _ _ / / \ RECESSED INTO GROUD WITH Css V€SCH 10 AILS. CLOSE IrXISTIN`i\ - - - _ _ _ - - - - - ' 0, FILTER FABRIC UNDERNEATH. DELVATERM ORIFICE HOLE - ' - - - _ _ - - - / �w� ' \ \ \ \ \ 1 I - OS co /660 U7- - 615-� - NOTE: _ - - '/ _ ', , / / / / _ � \ \ \ \ � I � \ - - \ \ \ � - - - \ � \CONTRACTOR TO DEWATER EXISTING 'Ir 11 I ' / /' / / / / / r / _ - \ \ \ - I I` ` - - \ \ . \ \\ POND, REMOVE POSTS, AND GRADE / - DOWN TO DESIGN ELEVATION. CONFIRM THE INVERT OUT RISER SATELFOR THE W� BELOW BEFORE BEGINNING S80 5735" CONSTRUCTION AND COORDINATE - \ ^ \ ANY CONFLICTS WITH ENGINEER. CONVERSION OF SEDIMENT BASIN INTO STORMWATER MANAGEMENT DRY POND WOOD -FENCE ---� Q--------- 9.78' O 6 _ / N86 �{8'34'E 3 Q�2 � -- - �� `I s Inv = 903 F1 TRANSITION FROM SHEET I=. FLOW TO CHANNEL FLOW (V TC: 6 MIN (ASSUMED) ,may 69 e:' . I SHEET FLOW: 2.3 MIN SHALLOW CONC.: 1.0 MIN `T CHANNEL FLOW: 0.40 MIN °pew TOE UNDISTURBED AREA 1 40 TOTAL AREA: 0.42 AC. " ° x 6" so Q CN: 98 ae, ;nr TC: 6 MIN. to �..� � J I CMDY L IL 43 6j I POST -DEVELOPED AREA OF \ --�-- `� ANALYSIS PID 55B-15 N/F R. A. YANCEV LUMBER CORP. I D.B. 363, 17 88 )Adds_ 1�1 8 / /d / Addition I XIm m 1 {[ 01 kw TRANSITION FROM SHALLOW / 8i / \ CONC. FLOW TOCHANNEL / I / / , I / ', / /��' 1 \\\ 1 1 .t ------ - x ) \FLOWTO.�xtir< Jr- / / �♦♦ 1 \ \ \ / / I \ Q \ ' '; I 1 I I I I II I I o^o � \ II I //- / UNDISTURBED AREA 3 ., / \ / // / - �\ ' \ I/i _ V TOTAL AREA: 0.14 AC. / / \ \ \ / / \ / - / \ \ ; It ' CN: 69 SCALE 1" 0' TC: 6MIN. ♦`--- / I \ \ /10 \ 40' \ 80 / / / / I I` UNDISTURBED AREA 3 TOTAL AREA: 0.14 AC. i s POINT OF Of / / N.. ANALYSISYSIS 1 `` � 1 I / / / TC: 6 M/ / / PRE DEVELOPED AREA I �( AID 55B-4 - - x P/D 55B-3 / I It I If 1\ II I I \\\\ I 1 2 / // k/ \ \ /D 55-1096 �i P/D 55-1096 �96 h OCKF/SH O.Alf LLI' \ 11 / 1 N/F 6135 ROCKFISH GAP/ L L C ' l 1 \ \ \ \ \ \ a P � � 456.7. CT. 7 / / I DB. 4567 PG. 7 \ \ I I N/F R. A. / / / II IJ / ; \ 1\ \\ \ `\ 1 _ TOTAL AREA: 2.42 AC. IMPERVIOUS AREA: 1.35 AC. PERVIOUS AREA: 1.07 AC. �Zao CN: 85 TC: 6 MIN. � \ . � . .�. • 17ra field � ? . . . NV / 4, SCALE V=40' 40' 80, l I 1 \ MODIFY EXISTING RISER AND^ SPILLWAY PER "CONVERSION I/ 'I ►1 -� \ \\ OF SEDIMENT BASIN INTO \ STORMWATER MANAGEMENT - -' J. - POINT OF 'DRY POND" DETAIL.- \ ANALYSIS 1 _ - - - _ POST -DEVELOPED AREA M E O o � N Vi N C >E -E w Lu LL o 3 wo K , j M Q J i m Z dy - v O d > a (� W Bp 3 0 N x < vn J ojx W Lnx =N z O =U>� <N y N M 0� a � 00 � H DATE 31312023 DRAWN BY S. KIRBY • DESIGNED BY • S. KIRBY • CHECKED BY J. SHOWALTER • • SCALE AS SHOWN FT N Z 0 0 z Q z z O w Q>w �� } Z V 1 z z°LLJ Lu J < w Ow LLJ J un LU oC p 0 ILLI If JOB NO. 57005 SHEET NO. SW-6 0 c 5 a L