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HomeMy WebLinkAboutWPO201700037 Plan - VSMP 2022-08-02�\ _ � J Phase IIA Sediment Trap #1 De MAPPED /ProposedSI g FLOODPLAIN OO / / \ 0 _ _ \ - Typ, I drainage area (acres) (<3) 2.97 ,vAauaE " / \ trap volumes: ORIGINALCREST OF STONE WEIR elevation (ft) area (sf) volume(cf) wlume(cy) AND \ 382 1419 0 0.0 y SCOTT R. LLINSZ / / 384 2462 3,833 142.0 DRYSTORAGE - yA �T U Lic. No. 035791 a /LIMITS OF / / / J /// �/ 386 3699 9,953 368.6 o y \ \ ^ p 7/26/22 tv \- STREAM TYP. / / _ 388 5052 18,669 691.4 0� — \ \ ' / \ O/ / \ OO OO OO OO \ \ \ WET STORAGE 4. �SSIONAL V, FLA EVEL VDOT CC AI -COARSE — MGINA l /� \�(/( �)) (EXfJ�VAlEO) \ / O \ \ FILTER CLOTH CRWND AGGREGATE OUTLET PROTECLOiV _ �_ �llJ�l- WITH GEOTEXTILE FILTER FABRICS � �� �_- wet storage: E�� I - -- g -SEE PLATE 3.13-1 CONME AMKCATECUSS I RiPRAP UNDERLAYMENT. FABRTO BE - -�- — \ — ��- _ - -` /_ — \ wet storage required (cy) (67*DA) 199.0 KEYED INTO THE EXISTING GROU I — �� - — _ \ \ O bottom of stone weir (ft) 384.5 A MIN. OF g" AT THE ENDS &CON _ _ -- _ \ \ THE PERIMETER. FABRIC \TO �� PR�SER-VE� \ V \ — \ \ wet storage provided at this elevation (cy) 199.0 OVERLAP A M]IN. OF g" (L-27', WZ-6', /— STEEP SLOPES - - --- - - — — \ \\ t s _ � — -- - - � slope of we forage sides 2:1 _g APPROVED 111.00' - - � _ � � weir length (ft) (6�A) 17.8 W2- ', D-18" MIN.). RIPRAP TO n� _IYP. A OF 015' CL. III RCP - \ EXTEND TO NNEL BANK v I I - \ \ dry storage: bottom of trap elevation (ft) 382 Lu @ 3.60% w/ VDOT - - - -- - \ _ ` 199.0 bottom dimensions: 9 A8' Ln N — — - STD. EW-1 \ \ \ \ \ cresttof stone weir (cy) (67*DA) 387 0 dam elevate 88 a - - / � \ `Aod top of on (ft) 3 a l -- - - — EXISTING, APPROVED O m dry storage provided at this elevation (cy) 331.0 top width of dam (ft) 6' J i APPROVED 100' WIDE VDOT CL. Al RIPRAP ------ _LIMITS OF DISTURBANCE, �� \ Ln \ _ LINED EMERGENCY SPILLWAY CREST - / P '"� _ O sb of dr stora a sides 2:1 to trap dimensions 150x43' z w N / — — ELEV.=396.66'. SPILLWAY TO HAVE 4:1 -- — —%%\\ REDLINE SITE PLAN AMENDEMNT NARRATIVE: o a N / SIDE SLOPES FOR VEHICULAR - _ _ \ \ HIS PLAN IS A REDLINE AMENDMENT PLAN FOR BROOKHILL SECTION 1 MASS GRADING VSMP PLAN ./� : N TRANSITIONS. \ \� - PROPOSED \ \ \ O Vi 12 w ---� AMENDMENT #2 WP02017-00037 . THIS REDLINE AMENDMENT IS NECESSARY TO PROVIDE _ _ REENWAY w � E — — APPROVED \ ,_ \ �\ OO \ADDITIONAL EROSION CONTROL MEASURES FOR THE PROPOSED ONSITE FILL AREA. THE SILT FENCE IN a Ln w TYP. s5. - ss s F ssF / l0' WIDE TOPS _ �� u� ss�y V� \ \ HIS AREA IS NOT ENOUGH TO CONTROL THE RUN-OFF ALONG THE HILLSIDE ON THIS SITE PLAN. THIS O o OF DAM , _\� _ ass .� ss�\ \ \ REDLINE AMENDMENT PLAN PROPOSES THE CONTINUOUS USE OF DIVERSION DITCHES ALONG THE w ? Z ELEV.=398' — P, �ss� 4ARo i ASS - -_ A \ V A ' �s� — yss RIDGE OF THE EXISTING SLOPE, DIVERTING THE RUN-OFF FROM THE UPLAND AREA OF THE VILLAGE o �� , ENTER TO THE (2) SEDIMENT BASINS. THIS REDLINE AMENDMENT PLAN ALSO PROPOSES THE w s APPROVED SUPER SILT DDITION OF A SEDIMENT TRAP BELOW THE FILL AREA WITH A DIVERSION BERM DIRECTING RUN-OFF / / / �� v �� FENCE DA j�. W / / � 0O THE SEDIMENT TRAP. IN ADDITION, AS THE FILL IS BEING PLACED IN THIS AREA, THE REVERSE lu ✓ - �ass �l "� / / �5 - \ BENCHES SHALL BE INSTALLED, AS SHOWN ON THIS REDLINE AMENDMENT PLAN. THE CONTRACTOR tie m 1 I �� �� � j = . `ow 'r � s \ �� � �� ILL INSTALL THE PROPOSED YARD DRAIN SYSTEM ALONG THESE BENCHES AND OUTFALL THEM INTO I ��' — L % x ' \ HE SEDIMENT TRAP THE ADDITON OF A SEDIMENT TRAP AND REVERSE BENCHES WITH THE YARD y� I / DRAIN SYSTEM WILL HELP CONTROL THE RUN-OFF OF THIS 2.97 ACRES OF DISTURBANCE WHILE THE s_ — As x �� ��ss FINAL FILL IS BEING PLACED IN THIS AREA. THE RUN-OFF FROM THIS 2.97 ACRES OF DISTURBANCE WILL � *x �38� —<� a BE DIVERTED TO THE NEW SEDIMENT TRAP FOR EROSION CONTROL TREATMENT. / W1YARDHUNE DP,41A N N IP YAR M cli * x *IP 1+1 t REVERSE BENCH I - \ REVERSE BENCH DETAIL NO SCALE + - / �- ++++++++++++ I I I Oo M \ V 1 1 I Cn + +� N Z M ++ 0 Y _ + I APPROVED VDOT STD. B-1 _ (048" REINFORCED CONCRETE + OPENING) TO SERVE AS d48" ESC RISER STRUCTURE. RISER 1 II I I I IIII� �. I II I I\ I I ( I I I I I I I I0 / I I I I I I I�CND I I + -TO INCLUDE �INvC�LAUDE \AN 8CN 'VWx��CONCRETE F\OUNI DATION & TRASHRACKSEE SWM DETAIL SHEET FOR TRASHRACK , CONTRACTOSHALLINSTALITHE REVERSE II � I IIII,, II� II� I�I�I III IIII IIIIIII II\ v, �IA\ 1\I �I \\ I1 \\ 1IIIIIIIIII II I IIII I�IIII�II II �I III II / III III II III�IIJI IIII IIW�N> Qv SPECIFICATIONS. SEE APPROVED SHEET 13 FOR DETAILS. ESC SLOPE BERMS AND DRAINAGE SYSTEM WITH THE APPROVED SAFETY FENCE, z FILLING OF THE EMBANKME T. DRAINAGE SYSTEM INSTALL SIGNSWARNING + RISER RIM ELEV.=395.66 WITH DEWATERING ORIFICE AT OUTFALL INTOPROD SEDIMENT TRAP#1. Q ��392.3'. SEDIMENT CLEANOUT ELEVATION= 390.98'.QUICK SAND, KEEP OUT" LU Ln o PHASE IIA SEDIMENT TRAP #1 DA=2.97 AC. a LUz - /4t 11'1 0 0 1 / 1 I I � I z :+� : � .- - 111 v 1 11 11 1 I I --� -' x x E l� � I S F I I � v 1 I I I I I I 1 z � R PRAP OUTFALL I I I I \ P I / P. I I \ U o y I I I III I I BM I V LIMITS OF I I I I i / '1 � � � P ISTU BANE, I L- 2 , W-6 ,D=2 , I I � � A \ � U � ys W� 1 �� �� I I i ��ROPO$ �ySED iSF I �/ I Z 5 WITH`WIR� ; �� \ U O ul � l/1 J / ♦ I -. % :, / / o� I I * x* �ROPOSED THE PROTECTION W W TO INSTALLED ---�- ✓// I r/ � / / / / AL NG LIM TS O DISTURBANCE TP \ \\ \ = Q FEtdCIN / DD TO A/ PROTS D PROPOSED TREELINE \ W \ \� x * 9 �� � i 'i/ � � � PROPOSED PHASE IIA SEDIMENT TRAP #1. SEE THE UPPER \ / , - - �� N w / RIGHT PORTION OF THIS SHEET FOR DESIGN DATA. SEDIMENT \ \ CONTRACTOR SHALL INSTALL PROPOSED / I x TRAP TO REMAIN UNTIL THE LEVEL SPREADER AND FILTER p LL DIVERSIONS AT THE TOP OF THE FILL / — \ EMBANKMENT, DIRECTINGRUNOFF UPLAND %� �.-, ` STRIP ARE READY TO BE CONSTRUCTED, O UNTIL APPROVAL I I �\ �\ 0 N - _ / F ® INSPECTOR TO REMOVE IT. OF THE EMBANKMENT INTO APPROVED /� �� � � � � HAS BEEN GRANTED BY THE ESC I I I I T BASINS B& #4 / SF EXISTING SEDIMENT I/ s \ �w r ssF APP OV�D SF,ss by thAlbeaCounty PROPOSED ntCommunit Develome� rlin aDm OFDAMELEV.= SF R Date �/�/2022 SSF / File WP 700037 - FIELD SWPPPP EXHIBI JOB No. Ln \ \ss�_ssF—SS —ss ( / / // Y \. 182150 GRAPHIC SCALE / / I I I SUMPAROUND S��RM)A T\ \ I I / O / \ yE _ SCALE / U RIPRAP OUTFALLvv _ / 30 0 is ao so tzo VAPLA, & TI ©TO NOFF U T�MES ATRELY DRAB' NS � V L=16' W=8' D=2' A / / PROPOSED 1 n=30� I I I � i j TO�AR VE ECpiMENT BASIN 4. _ I GREENWAY ( IN FEET) \ �ROPOSE� 18' WIDE �� ��� ���1� � \ \ � SPIL WAY CREST ELEV. ; 38T �� \ �� �� �', 12A 1 inch - 30 ft. \ SHEET N0.