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HomeMy WebLinkAboutWPO201600009 Plan - As-built Minor Amendment 2018-07-30A 0 D TRAI V1 LAG STORMWATER MANAGEMENT PLAN FOR FACI ITY 3 AMENDMENT TO WP020160000 SITE DATA DEPARTMENT OF COMMUNITY DEVELOPMENT OWNER / DEVELOPER. MARCH MOUNTAIN PROPERTIES LLC CONTACT: DAVE BROCKMAN OLD TRAIL VILLAGE i 1005 HEA THERCROFT CIRCLE, SUITE 100 CELL: (702) -985-9088 s CROZET VA, 22932 dave@oldtrailvillage.com PLAN PREPARER: ROUDABUSH, GALE, & ASSOCIATES W5N 914 MONTICELLO ROAD T- o CHARLOTTESVILLE, VA. 22902 1,� (434) -977-0205 TAX MAP PARCEL No: 055EO-01-EV-C ZONING: NEIGHBORHOOD MODEL DISTRICT IN ACCORDANCE WITH PROFFERS r,0 OF ZMA-2015-00001 APPROVED ON FEBRUARY 10, 2016 MAGISTERIAL DISTRICT., WHITE HALL MAGISTERIAL DISTRICT STORMWATER MANAGEMENT: AS DEFINED BY THE OVERALL STORMWATER MASTER PLAN WP0201600009 WATERSHED: LICKINGHOLE CREEK TOPOGRAPHY: LOUISA AERIAL SURVEYS, AUGUST 2012. O BLOCK 13B ROAD & UTILITY ASBUILTS 11/24/2015. BLOCK 14 ROAD & UTILITY ASBUILTS 04/24/2015. CO) TOPOGRAPHY FIELD SURVEY 03/03/2015.UPDATE: ASBUIL T SURVEY APRIL 2018 FOR SWM AMENDMENT. DATUM: VERTICAL - NAVD 88, HORIZONTAL - NAD 83 CRITICAL SLOPES: NO CRITICAL SLOPES EXIST WITHIN THE PROJECT LIMITS. FLOODPLAIN: THIS PROJECT IS LOCATED WITHIN FLOODPLAIN. LIMITS AS SHOWN ON FLOOD INSURANCE RATE MAP. V COMMUNITY PANEL NUMBER 510006 0237 D. EFFECTIVE DATE: FEBRUARY 4. 2005 LANDSCAPING: SEE WP0201600009 LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND DETAILS CRO T, VA y�. ............ VICINITY MAP SCALE: 1 "=1000 FEET SHEET INDEX SHEET 1 ---------- AMENDMENT COVER SHEET SHEET 2 ---------- EXISTING/AS-BUILT CONDITIONS SHEET 3 ---------- APPROVED SWM DESIGN FROM WP0201600009 SHEET 4 ---------- SWM AMENDMENT PLAN & SWM CALCS SHEET 5 ---------- APPROVED SWM PROFILE FROM WP020160009 SHEET 6 ---------- SWM AMENDMENT NOTES & DETAILS SHEET 7 ---------- LANDSCAPE PLAN GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. i7y L. Taggart Lic. N0. 22841 �<v� FS3�0NAL ENG APPROVW by the Albemarle County Community F evelc ment Department Date File T� APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT ENGINEERING i INSPECTIONS s w U y�. ............ VICINITY MAP SCALE: 1 "=1000 FEET SHEET INDEX SHEET 1 ---------- AMENDMENT COVER SHEET SHEET 2 ---------- EXISTING/AS-BUILT CONDITIONS SHEET 3 ---------- APPROVED SWM DESIGN FROM WP0201600009 SHEET 4 ---------- SWM AMENDMENT PLAN & SWM CALCS SHEET 5 ---------- APPROVED SWM PROFILE FROM WP020160009 SHEET 6 ---------- SWM AMENDMENT NOTES & DETAILS SHEET 7 ---------- LANDSCAPE PLAN GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. i7y L. Taggart Lic. N0. 22841 �<v� FS3�0NAL ENG APPROVW by the Albemarle County Community F evelc ment Department Date File T� APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT ENGINEERING T 1 Vz INSPECTIONS s w U W5N Z T- o -, fl 1,� N y�. ............ VICINITY MAP SCALE: 1 "=1000 FEET SHEET INDEX SHEET 1 ---------- AMENDMENT COVER SHEET SHEET 2 ---------- EXISTING/AS-BUILT CONDITIONS SHEET 3 ---------- APPROVED SWM DESIGN FROM WP0201600009 SHEET 4 ---------- SWM AMENDMENT PLAN & SWM CALCS SHEET 5 ---------- APPROVED SWM PROFILE FROM WP020160009 SHEET 6 ---------- SWM AMENDMENT NOTES & DETAILS SHEET 7 ---------- LANDSCAPE PLAN GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. i7y L. Taggart Lic. N0. 22841 �<v� FS3�0NAL ENG APPROVW by the Albemarle County Community F evelc ment Department Date File T� APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT ENGINEERING T 1 Vz INSPECTIONS a A REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 T 1 Vz a w U W5N Z T- o 1,� N z z a Q" r,0 5 >Qw= sO O g as � z r� vL O O CO) � 0 3 018 aWqq J2 V a O0- OJ CO) 0 LL J -LL th` 0: ::U1 C9 4 L L cc �� CL LU 00) � W ®W = a REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 FILE NUMBER 8053 SHEET 1 OF 7 O O W5N Z T- o V Z 1"' z Jw; WOW W 5 >Qw= J Q o Zcr 00 U wwW � 0 3 C90 aWqq J2 V a O0- OJ CO) L cr0 LL FILE NUMBER 8053 SHEET 1 OF 7 r -' PROJECT LIMITS a - CHANNEL C -L3-1 EXISTING CONTOURS �00 APPROXIMATE LOCATION OF EXISTING STREAM BUFFER ,11 PROPOSE© GRADES PROPOSED BIORETENTION OUTLET ti FOOTPRINT PROTECTION L-3-2 PROPOSED STORM SEWER NETWORK COUNTY CRITICAL SLOPES 622 6- Aft MR. {2007} .CROSS SECTION MINIMUM MAINTENANCE ACCESS LIMITS LAP RAIL FENCE rAd IT INV T - 638.40 "--_ V t�, STANDARD VDOT SWM -1 RISER //yy i wad CREST 636.E FT \4.. ._.'` > �`�� -..... .�'` , • 1_R I RI f ' I -I it R I I` I f`_ P rri A q fl n fi PT NOTES: AMENDMENT TO WP0201600009, I. DUE TO SIGNIFICANT AMOUNTS OF ROCK BEING LOCATED WITHIN THE jo APPROVED AREA FOR THE BIOFILTER, THIS AMENDMENT PLAN PROPOSES TO CONSTRUCT AN ENHANCED EXTENDED DETENTION POND USING THE EXISTING SEDIMENT BASIN IN LIEU OF A BIOFILTER, WHICH WILL REMAIN CONSISTENT WITH THE APPROVED DESIGN FROM WP02Oi6000O9 BY 0 30 60 PROVIDING 50% POLLUTANT REMOVAL EFFICIENCY. 2. ALL DRAINAGE AREAS FROM THE APPROVED PLAN WP0201600009 WILL REMAIN UNCHANGED. APPROXIMATE SCALE (FEET) 3. SWM CALCULATIONS WERE GENERATED FROM DESIGN PARAMETERS -DETERMINED INTHEAPPROVED PLAN WP0201600009 SHOWN ON SHEET 3. 4. ALL OTHER DESIGN PARAMETERS EXCEPT THE NOTES AND DETAILS SHOWN HERE ON THE AMENDED SECTIONS OF WP0201600009 (SUCH AS EROSION CONTROL PLAN) ARE TO REMAIN UNCHANGED AND SHALL ADHERE TO THE APPROVED PLAN WP0201600009. 5. REFER TO SHEET 7 FOR APPROVED DETENTION LANDSCAPING SCHEDULE. 6. REFER TO WP0201600009 FOR ADEQUATE CHANNEL CALCULATIONS. STANDARD VDOT MH -1 f. - RIM ELEVATION = 654.00 FT 1 .iZ iNUh Kir LENGTH = 32 FEET INV UP = 652.00 FT - ----- INV DOWN = 648.00 FT DI -1 CREST ELEVATION = 656.80 FT ~� 47746 SF BIORETENTION FACILITY FLOOR ELEVATION = 656.3 FT LEVEL SPREAD R ELEVATION - 656.3 (5.7 CY) STRUCTURAL WALL CONTRACTOR SHALL - PROVIDE SEALED SHOP DRAWINGS FOR OWNER REVIEW may; y7" NOTES: 1. EMBANKMENT BACKFILL MATERIALS SHALL CONSIST OF O" MH SOILS, CONTRACTOR2. FEET ALONGTHE PERIMETER OF THE FACILITY. CONTRACTOR Or DRAWINGS/INFORMATIOIN TO THE OWNER r` INSTALLATION.APPROVAL PRIOR TO PURCHASE AND 1READ: EXPERIENCES WATER SURFACE FLUCTUATION AND STANDING WATER. NO TRESPASSING.11 1 06/28,/16 REVISED PER COUNTY COMMEN'T'S --- REV DATE DESCRIPTION AJT I JGM I JGM DSN I CHK J APP 04 J. GLENN MUCKY Lie. No. 005970 p , / VIS8110NA PREPARED BY L-3 SUMMARY: PRE -DEVELOPMENT: Williamsburg, VA 23188 TOTAL DRAINAGE AREA = 6.90 ACRES FOR: ESTIMATED IMPERVIOUS AREA = 0.00 ACRES CROZET, VA CURVE NUMBER = 60.90 L-3 BIORETENTION POST -DEVELOPMENT: DRAWN BY: DESIGNED BY: TOTAL DRAINAGE AREA = 6.88 ACRES CHECKED BY: ESTIMATED IMPERVIOUS AREA = 3.69 ACRES JGM CURVE NUMBER = 80.10* PROJECT NUMBER: BIORETENTION SIZING: 203400430 REQUIRED AREA = 2.5% * IMPERVIOUS ACREAGE DATE: = 0.025 * 3.69 AC * 43560 SF 1 AC = 4,019 S.F. 05/20/2016 PROVIDED AREA = 4,746 S.F. SHEET: WATER. QUALITY TREATMENT: Q.;! Z I POST -DEVELOPMENT POLLUTANT LOAD = 8.36 (LBS-TP/YR) POLLUTANT REMOVAL EFFICIENCY = 50% TOTAL ESTIMATED POLLUTANT REMOVAL = 4.18 (LBS-TP/YR) HYDROLOGIC SUMMARY: 2 -YEAR 10 -YEAR 100 -YEAR CFS CFS CFS PRE -DEVELOPMENT 4.71 14,32 36.64 POST -DEVELOPMENT (UNROUTED) 17,94 32,51 60.35 POST -DEVELOPMENT (ROUTED) 1.91 7,14 45.03 POST -DEVELOPMENT _Lo U� (COMPLIANCE NODE) 1.94 7.24 45.47 ROUTED PEAK ELEVATIONS: 2 -YEAR 10 -YEAR 100 -YEAR FT FT FT BIORETENTION FILTER 657.44 657,62 657.90 DETENTION BASIN 634.34 636,61 637.40 L0 U LL -1 NOTES: 1. EMBANKMENT BACKFILL MATERIALS SHALL CONSIST OF O" MH SOILS, CONTRACTOR2. FEET ALONGTHE PERIMETER OF THE FACILITY. CONTRACTOR Or DRAWINGS/INFORMATIOIN TO THE OWNER r` INSTALLATION.APPROVAL PRIOR TO PURCHASE AND 1READ: EXPERIENCES WATER SURFACE FLUCTUATION AND STANDING WATER. NO TRESPASSING.11 1 06/28,/16 REVISED PER COUNTY COMMEN'T'S --- REV DATE DESCRIPTION AJT I JGM I JGM DSN I CHK J APP 04 J. GLENN MUCKY Lie. No. 005970 p , / VIS8110NA PREPARED BY tantec 5209 Center Street Williamsburg, VA 23188 PHONE: (757) 220-6869 FAX: (757) 229-4507 FOR: OLD TRAIL VILLAGE CROZET, VA TITLE: L-3 BIORETENTION GRADING AND LAYOUT DRAWN BY: DESIGNED BY: AJT JGM CHECKED BY: APPROVED BY: JGM JGM PROJECT NUMBER: SCALE: 203400430 1" = 30' DATE: FILE PATH: 05/20/2016 0:1203400430 SHEET: g J REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=30' CONTOUR INTERVAL 2 FEET • U a 0 � U w� Z Z CL 2 CD �m oN No :5 g CL Qr acc z 0 > Q Cc LU I=@ g Q.;! Z wo z t/1 0� J W2 U Q UQ ow U) J � N W 0 Q� Z� _Lo U� 10 N 0 co L0 U LL -1 w LL w Wctcc O a W p 0 Z ti 2 Z Q co T w W = a REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=30' CONTOUR INTERVAL 2 FEET FILE NUMBER 8053 SHEET 30F7 o� 0 0 0 Wga Z CL r O Z 0.. g �Z3 J w0 w �- z 0 > i Q Lu Q -� Q o W00 W20 Z> W U F- Q a cr o �� C W J 00-< cc�IL 10 mi Q 0 LL FILE NUMBER 8053 SHEET 30F7 1 Determine ttt a+Iialal area (A) ande ,post -Veiled impervious der(ist)... I l � � 013 3 s f. or 6;880 acres p I CALCULATED USING TOTAL I ..___...._. ..._.. _ ..._._. _..... _ AREA (F; -RA AC) FROM APPROVFO �..............__.__.._ ___ ,.. _. SCALE 1" = 20' 20 i0 0 20 40 SCALE IN FEET H -/ "- Runoff Hydrograph: TR -55 Tabular Hydrograph Method ... /. sir � .._. Input Data. - 2YR _-- -- --- H. Rainfall Distribution Type: Type II b Rainfall Depth: 3.68 .6 in Base Flow: 0.000 cfs ._.. __._. / a � .. , la/P Interpolation: On I BMP 1: _.. BMP 2: Iype tTriclency ttt a 4a.r.1 Bioftlter 0 6 `0 640.00 Enhanced ED 50 290693, 1603737 Maximum Pond Elevation: 634.60 ft 1 CALCULATED WITH BIOFlLTER OMITTED i I I ALL 5096 R 0 \. \\ h. ASBUILT CALCULATED WITH REMOVAL T ,s \ �... � ,.... _..._ ,. / / 3 � :. \ \ \ \l Reservoir Routing: a Indication Method r�Linrn rvrr►inrn nrrr►Tun►�f %i :\ ✓`.., SO rl. �. / .t / ? i � i f %RIP -RAP .\ g g �yT H OF Jimmy L. Taggart Lic. No. 22841 FSS/ONAU Multiple Outlet Design Outflow Total Discharge: 118.1553 cfs Water Surface Elevation: 640.00 ft Tailwater Elevation: 0.00 ft Detention Base Elevation: 0.00 ft /Outlet'RISER, Drop Pipe 1 ZTU Riser Top Elev: 636.22 ft Riser Base Elev: 627.87 ft Riser Diameter: 48.00 in J Orifice Coefficient: 0.60 cc W Weir Coefficient: 3.33 in Culvert Length: 94.38 ft Culvert Diameter: 36.00 in Culvert Invert Out: 621.65 ft Culvert Friction Coefficient: 0.01 cfs Culvert Entrance Loss Coefficient: 0.01 ft/s Discharge: 113.15 cfs Outlet #2: 01, Orifice Shape: Circular W Diameter: 6.00 in Invert Elevation: 630.00 ft Coefficient: 0.60 2 04 8� Number of Openings: 1 ZTU Discharge: 2.95 cfs Velocity: 5.03 ft/s Outlet #3: 02, Orifice Q` 0 cc Shape: Circular cc W Diameter: 6.00 in Invert Elevation: 635.00 ft Coefficient: 0.60 J Z Number of Openings: 1 � 0� Discharge: 2.06 cfs Velocity: 10.49 ft/s TOTAL: 8,454 SF SEDIMENT FOREBAY: 17% (1,438 SF) MARSH ZONES: 31% (2,620 SF) DEEP ZONE: 52% (4,396 SF) BUFFER ZONE A VEGETATED BUFFER STRIP SHOULD BE MAINTAINED BESIDE THE BASIN. THE STRIP SHOULD BE A MINIMUM OF 20 FEET WIDE, AS MEASURED FROM THE MAXIMUM WATER SURFACE ELEVATION. DETERMINED IN THE APPROVED PLAN WP0201600009 SHOWN ON SHEET 3. 6. Verify compliance: Lretne�ediiofat ? RR 4. ALL OTHER DESIGN PARAMETERS EXCEPT THE NOTES AND DETAILS SHOWN 4.18 Tata{ Pounds r year removed I rezrta.�d`totai y STRM'':. 1 HERE ON THE AMENDED SECTIONS OF WP0201600009 (SUCH AS EROSION _ > \ TOP667:26 f CONTROL PLAN) ARE TO REMAIN UNCHANGED AND SHALL ADHERE TO THE �? CALCULATIONS SHOW REMOVAL OF 4.18 LB/YR THROUGH PROPOSED DESIGN FOR ENHANCED EXTENDED 7 \\ \ { APPROVED PLAN WP0201600009. 2 �\\ \r I.I.=657.46 .�29) ' ;y 5. REFER TO SHEET 7 FOR APPROVED DETENTION LANDSCAPING SCHEDULE. DETENTION WHICH REMAINS COMPLIANT WITH APPROVED PLAN \ � \ j `, \ 1 I.I -657.16 3 6. REFER TO WP0201600009 FOR ADEQUATE CHANNEL CALCULATIONS. \\�\\ 1.0.=:656.46 STRM\\ i 1 a / 3 a au Project WQV {1" per imp, area}= 13394.8 C.F. REQUIRED TREATMENT VOLUME CALCULATIONS I FOR ENHANCED ED PER VSMH 3.07-5 \ \ \�� I.I 659.48 Project WQV (112" per imp, area)= 6692.4 C.F. / \\ \\\\ _ SEDIMENT FOREBAY SHALL CONTAIN A MINIMUM OF 0.10 RAINFALL PER ACRE OF IMPERVIOUS COVER (3,349 CF) SHALLOW MARSH SHALL REPRESENT 1.0 X WQV (6,698 CF) WHILE THE EXTENDED DETENTION PORTION SHALL REPRESENT AN \ \\\ ADDITIONAL 1.0 X WQV (6,698 CF). ��' ` )lBLI 0 / REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=20' CONTOUR INTERVAL 2 FEET • U W a w � 0 cc 0 ww LU 2 z(0 2 04 8� Wgo� ZTU 04 0 I -a. Z g z �Z Q` 0 cc o cc W fr@ 5 J Q o o r/J � CLw� J Z v Q � 0� J Wm i QUQ 1= W w V� J N coQ� UN W 0� a� O� a� o� W� J vLL W N WrX W 2 CD 4 d' �W OW 2 O (L REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=20' CONTOUR INTERVAL 2 FEET FILE NUMBER 8053 SHEET 4OF7 CD 01 O J 8< Wgo� ZTU T- o 0 I -a. 3:0) g z �Z WO� Jw~ _ > 0ZZ Q Wg 5 J Q o a, 0 2Z W2z v �'- Q Q W i �3JM 0 w J2 0 c�Z 0�W coQ� LL Q O� a� C0 FILE NUMBER 8053 SHEET 4OF7 , 2 I a z _2 E- Iu 0 In, 672 668 664 660 656 652 648 644 640 bib 632 628 624 620 616 _ I�I1II,I� ,. ° (ASB) FLOW VELOCITY ,... . .1­l, .R.. :I::.I­­­" �, � 1'.­1II...:.II::;: .1I.-11 ._.E7.. ­_i..I..;I; ­� ­­,i..I� ­� ­­"�I . _ . -TER -TER ;CANNOT :' STORK T:E WO PROPOSED;,,,,,e-..._ A­� ��,-LN, r��� f'FK R ;� PLANS _:.::�III ___`___.' : �,i�€s sF s�vrrvYa�v �Ae iL�Fr BE INSTALLED DUE (FT/S) CHANNEL? __ . IIII1II�.­.� '.1.-'. ItI, _ - IQR LTE' FL F2 = 6 ❑� Ia oa s5 ,s FT TO 'ROCK. SEE = 635.0 FT, NAVD88 -- =PROPOSE � GRADE . _ __. NOTES & DETAILS i. _; _. - - NQ INVERT OF CULVERT ASB (ASB) ­.1..�­ -____ . ...I ON SHEETS 4 &_& 1.91 0.24 : , STANDARD VDOT MH -1 ExisTIN c�RAaE , , NO II E1 ELVATIQN = 62.00 F T . of -1 Rise 1-11 8.5 FT IIIII , _ w CREST LEVATION 656,8 FT 19.5 10 -YR .- . 2.52 YES y �l / SRM EV 65,00 FF , 4V).42yjN RISER OUTER AREA = 18.35 SF `t O RISER FOOTPRINT = 5.78 SF _?, _.. SF MH -1 AFJDARD VDQT RISER BASE: I N a i 3.0, RISER BASE AREA 'I RIM ELEVATIC7N = 65 i.(i(l FF . EL BASE DEPTH . I o J J RISER OPENINGS: ;: . \ ; � ,, ., y� UPPER ORIFICE (6" DIAMETER) - 0.20 SF , : ;I / , :. E, LSP -DER . , , _ .. ❑ - 0.20 SF a W `•:.18INCET F � 11_ ' ' OUTFALL CULVERT (30° OUTER DIAMETER) " cpp� r�r� \ (ASD) 636.2.2: a. ST'NDARD VDQ( SA110 1 RISER •68Ei.FT T_ T 0) LI.I , LEN - 8 E-EEr ; , RISER BASE ELEVATIQN , Z O CREST TOTAL VOLUME (AREA X 5") UP=a56.40PT , , = 650.0 FT 1 , , 1-e INGM ORIFICE c 630.Qo r _, __ _ INV DOWN = 656.30 FT ., , %[ ,' 1- 6 INC ORIFICE @ 635.00 FT 11 __, - ,, . ;; _ = 7.3.40 CU -FT MIN, ._ MH -1 BASE ELE ATION r. ,: / ', _..... ,: .. `..,. _ ...... i ,..._... 655.40 Fi = 14,313 LBS ERM E LErVATION = 6 i0 FT �WEIG ., ...... 111.11 1, 3Q INCH ftCp \ :, . / 12 INCAS RCP % -' _ VOLUME OF OPENINGS .., - _. ___ :_.. LEN'TH 18FEE3I'll _,< , ''' :'. LENGFH-32 FEET'_ .; ., ,"; ! _. Rft.,;POSEU�CUL`JEKT �...._ '. V UP = 56.60 FT \. :....� ..... ', r... INV UP = 652 .00 Fl \ � ; -. : :. _. ..., :... �`�... .... _. ' . y. = 7,038 LBS SEE DETAIL.THfS SHEET " INV DOWN 656:50 FT / /1.1. „ , _ ..,. INV C) �iJN = 618.QO FT / z \ ; ,.,.. VOLUME OF BASE = 73.40 CU -FT , i _ WEIGHT OF BASE = 1 1,010 LBS ` , , / MM -1 BASE ELEVAiIC7N VVSE / \ I✓ A r Tr -)Q my c A l✓I✓Tv .. , : ..., ., .. ..,.:...1 __ .. ;__.:.._____L rh; NAL :.,.. .. ..... _ 646,0 FT ...... :' ,; .. .. :.. .:�. .,'._. ry . ;. ,!..: ,' - , J/ 11", ` , '/ / . / / / / I 56 IN RCP ,, \ ,. 1. ,. , . /" .... / p _ RIPRAP PROPOSED RI RA / is , : . LENGTH 83 FEET - : \ ;': _ ,, _ - INV UP- DANDSP G. .1$ /_:, ._ :, ,, ,. , ; i , :. ;: , , / _._ ( : , ... IN J DOVlP.-9Gi.ET _ / / /1. j, /` CLASS ISPRAP MIN. REE3TH = 2.2 FT ,:. . _, S8 .'6. (A ) 56.46' ,' , 11�. ".. . „ . ASB 638 08 } .. r.. f ? -. :, ;' , .. / :; - , ` ;, ,) :.......... . ......... RC)P 7SEI� RIPRAP / _,, OUTLET PROTECTION L-3 1 s ' ,. r ,R...,.❑ v ,;. y / ,- , :; -1-1 CLASS tRIPRAP i;.: PVIIN, DEPTH 2 FT ' ,., _. _ . ; . , .. ,%11; .;. % / , ASB / : RISER E3AS� ELE NATION - / /! �� ,.. , ,, ,, I �. ,, . ;: ;, ., = 62 .D F r 0 NGRETE `CRADLES i ,, OSED Co ATE ,, .1. .,""' OMITTED.%DUE TO G,E�11OTECH CRADLE / 1. ._.... / , ,, : , / /:. / ... , - . . I / / S ETAIL TFilS T ' , ONSITE / / .. •, ,.. _.., _, :, .,. :: ,. _,. _ , : ,: '.::, :.... . '':7 :, '. :... f POu,ED4"PERFORACED- SB 94.38 LF-+e,crFF�CP R� ( ) ❑ �\ . ,.I'll .... , / .:: ° , _.. ` ,'� _ . •'. LEPdGTH OF 36 R.CP NV UP PVC L)RAiPi'�'JiiAPPER IN i111. 11 oic TLE �E11 1 NOTE. / / •. INV DOWN A d3ii70.. F7LT RFABRIC GHr>NCd 2 - REFER TO GRADING PLAN FOR ACTUAL PROPOSED GRADED (;ase) s27a7 / SLOPES AS LABELS ARE SKEWED DUE TO SECTION ORIENTATION. \ , / ` ,/ - ,<% / AS 6 ( Q) 21.65 672 668 664 660 656 652 648 644 640 V3,) 632 628 624 620 616 612 _ _ _ -.... __ - _ - _�_�__________. _. 612 0+00 0+20 0+40 0+60 0+80 1+00 1+20 1+40 1+60 1+80 2+00 2+20 2+40 2+60 2+80 3+00 3+20 3+40 3+60 3+80 4+00 4+20 4+40 4+60 4+80 5+00 5+20 - -20 -10 0 10 20 DISTANCE (FT-.) DETAIL: C -L-1 (OUTFALL CHANNEL) VERTICAL SCALE. V= 2' HORIZONTAL SCALE: 1" = 10 NOTES: AMENDMENT TO WPO201600009 1. DUE TO SIGNIFICANT AMOUNTS OF ROCK BEING LOCATED WITHIN THE APPROVED AREA FOR THE BIOFILTER, THIS AMENDMENT PLAN PROPOSES TO CONSTRUCT AN ENHANCED EXTENDED DETENTION POND USING THE EXISTING SEDIMENT BASIN IN LIEU OF A BIOFILTER, WHICH WILL REMAIN CONSISTENT WITH THE APPROVED DESIGN FROM WPO201600009 BY PROVIDING 50% POLLUTANT REMOVAL EFFICIENCY. 2. ALL DRAINAGE AREAS FROM THE APPROVED PLAN WPO201600009 WILL REMAIN UNCHANGED. 3. SWM CALCULATIONS WERE (GENERATED FROM DESIGN PARAMETERS DETERMINED IN THE APPROVED PLAN WP0201600009 SHOWN ON SHEET 3. 4. ALL OTHER DESIGN PARAMETERS EXCEPT THE NOTES AND DETAILS SHOWN HERE ON THE AMENDED SECTIONS OF WPO201600009 (SUCH AS EROSION CONTROL PLAN) ARE TO REMAIN UNCHANGED AND SHALL ADHERE TO THE APPROVED PLAN WPO201600009. 5. REFER TO SHEET 7 FOR APPROVED DETENTION LANDSCAPING SCHEDULE. 6. REFER TO WPO201600009 FOR ADEQUATE CHANNEL CALCULATIONS. LIUULimIULIII�JL�! I 170 m 0 IN 30" DIAMETER - I - CULVERT7 T 6 INCH WATER QUALITY ORIFICE= SEE NOTE 8 A � , AQ A .4: .. d. .. '- ° CLAJ...3 A""J . I.;, ­ CONCRETE 1. METAL PLATE DEBRIS .� RACK CONCRETE TO BE -""""'-'L_ USED TO FILL SWM 8° DRAINAGE STRUCTURE TO INVERT OF OUTLET PIPE. 53 4'-O" DIA. _ 5,' SIDE VIIEW SWM DRAINAGE= STRUCTURE '" DIA. X 6" LG. ADHESIVE BOLTS W/FLAT WASHERS AND SELF LOCKING NUTS TYPICAL. 8 PLACES --EQUALLY --I--- r,na - „1^ r',in - - FLOTATION CALCULATIONS FOR RISER BASE FLOW FLOW VELOCITY ADEQUATE = 62.40 LBS/CU--FT QUANTITY STORK (CFS) D( (FT/S) CHANNEL? EROSIVE? (CY) = 635.0 FT, NAVD88 )H = 630.0 FT NAVD88 8 NQ INVERT OF CULVERT ASB (ASB) 627.87 42,8 fl -FT, NAVD88 2 -YR 1.91 0.24 1.65 YES NO 9 Q HEIGHT OF RISER 8.5 FT z RISER INSIDE DIAMETER 19.5 10 -YR 7.14 0.51 2.52 YES NO RISER INSIDE AREA NOTES: AMENDMENT TO WPO201600009 1. DUE TO SIGNIFICANT AMOUNTS OF ROCK BEING LOCATED WITHIN THE APPROVED AREA FOR THE BIOFILTER, THIS AMENDMENT PLAN PROPOSES TO CONSTRUCT AN ENHANCED EXTENDED DETENTION POND USING THE EXISTING SEDIMENT BASIN IN LIEU OF A BIOFILTER, WHICH WILL REMAIN CONSISTENT WITH THE APPROVED DESIGN FROM WPO201600009 BY PROVIDING 50% POLLUTANT REMOVAL EFFICIENCY. 2. ALL DRAINAGE AREAS FROM THE APPROVED PLAN WPO201600009 WILL REMAIN UNCHANGED. 3. SWM CALCULATIONS WERE (GENERATED FROM DESIGN PARAMETERS DETERMINED IN THE APPROVED PLAN WP0201600009 SHOWN ON SHEET 3. 4. ALL OTHER DESIGN PARAMETERS EXCEPT THE NOTES AND DETAILS SHOWN HERE ON THE AMENDED SECTIONS OF WPO201600009 (SUCH AS EROSION CONTROL PLAN) ARE TO REMAIN UNCHANGED AND SHALL ADHERE TO THE APPROVED PLAN WPO201600009. 5. REFER TO SHEET 7 FOR APPROVED DETENTION LANDSCAPING SCHEDULE. 6. REFER TO WPO201600009 FOR ADEQUATE CHANNEL CALCULATIONS. LIUULimIULIII�JL�! I 170 m 0 IN 30" DIAMETER - I - CULVERT7 T 6 INCH WATER QUALITY ORIFICE= SEE NOTE 8 A � , AQ A .4: .. d. .. '- ° CLAJ...3 A""J . I.;, ­ CONCRETE 1. METAL PLATE DEBRIS .� RACK CONCRETE TO BE -""""'-'L_ USED TO FILL SWM 8° DRAINAGE STRUCTURE TO INVERT OF OUTLET PIPE. 53 4'-O" DIA. _ 5,' SIDE VIIEW SWM DRAINAGE= STRUCTURE '" DIA. X 6" LG. ADHESIVE BOLTS W/FLAT WASHERS AND SELF LOCKING NUTS TYPICAL. 8 PLACES --EQUALLY --I--- r,na - „1^ r',in - - FLOTATION CALCULATIONS FOR RISER BASE NOTES: 1 . COST OF TRASH RACK AND DEBRIS RACK ARE TO BE INCLUDED IN THE PRICE BID FOR THE STORMWATER MANAGEMENT DRAINAGE STRUCTURE. 2. STRUCTURE MAY BE PRECAST OR I GIVEN: WEIGHT OF WATER = 62.40 LBS/CU--FT w w 0 WEIGHT OF CONCRETE = 150.00 LBS/CU--FT TOP INVERT OF RISER (ASB) 636.22�`FT, NAVD88 z INVERT OF UPPER 6` ORIFICE = 635.0 FT, NAVD88 LOWER 6 ORIFICE INVERT OF O iFIC = 630.0 FT NAVD88 8 NQ INVERT OF CULVERT ASB (ASB) 627.87 42,8 fl -FT, NAVD88 dab a0 BOTTOM INVERT OF RISER = 628.0 FT, NAVD88 9 Q HEIGHT OF RISER 8.5 FT z RISER INSIDE DIAMETER _ 4.0 FT Q 2 WALL THICKNESS = 5 INCHES Q RISER INSIDE AREA == 12.57 SF 4V).42yjN RISER OUTER AREA = 18.35 SF `t O RISER FOOTPRINT = 5.78 SF W RISER BASE: I N a i 3.0, RISER BASE AREA = 18.35 SF EL BASE DEPTH = 4.0 FT t5 W o J J RISER OPENINGS: Z �` to o W0 cm UPPER ORIFICE (6" DIAMETER) - 0.20 SF .c CC ~ O Z 1L ON LOWER ORIFICE (6 DIAMETER) - 0.20 SF a W 2 OUTFALL CULVERT (30° OUTER DIAMETER) = 4.91 SF V, Q rrp^ T_ T 0) LI.I V Z Wa Z O TOTAL VOLUME (AREA X 5") _ 2.21 CU -FT WEIGHT OF DISPLACED WATER: VOLUME OF RISER = 155.08 CU -FT ry t G -ll ( } u VOLUME OF BASE _ = 7.3.40 CU -FT MIN, TOTAL DISPLACED VOLUME -- 229.38 CU -FT WEIGHT OF DISPLACED WATER = 14,313 LBS �WEIG HT OF RISER: VOLUME OF RISER CONCRETE = 49.13 CU --FT VOLUME OF OPENINGS = 2.21 CU -FT TOTAL VOLUME OF RISER = 46.92 CU -FT WEIGHT OF RISER = 7,038 LBS WEIGHT OF BASE: VOLUME OF BASE = 73.40 CU -FT WEIGHT OF BASE = 1 1,010 LBS TOTAL DOWNWARD WEIGHT = 18,048 LBS I✓ A r Tr -)Q my c A l✓I✓Tv = 126 26 NOTES: 1 . COST OF TRASH RACK AND DEBRIS RACK ARE TO BE INCLUDED IN THE PRICE BID FOR THE STORMWATER MANAGEMENT DRAINAGE STRUCTURE. 2. STRUCTURE MAY BE PRECAST OR I REVISIONS COUNTY COMMENTS JULY 12 2018 1 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=30' CONTOUR INTERVAL 2 FEET O O O O t0 Z OW N W a0J a. 0 Z . LL' z g Lu 00 0 ir J w _ > >aW Jao® 0 2ZW U w2> � r Q QO i o�Jcr w J O � JCL co) aQ LL IT 0 LL FILE NUMBER 8053 I SHEET 5OF7 • U2a 4 w w 0 r wW z Zco = 9Nm 0� NQ Q2 J 0, dab a0 Q*, /�Z_�RO V cr 9 Q rz W 9; @ z DU Z Lz - Q 2 ct -% o0 J 5; J w¢ M Q UQ Ow 4V).42yjN `t O Q , 2 (5 Q 14 0) �` 0O W c ,, I N a i V crco �, EL ''^^ v, t5 W o J J Es Z �` to o W0 cm Mw \i W .c CC ~ O Z 1L ON W a W 2 � o V, Q rrp^ T_ T 0) LI.I V Z Wa Z O REVISIONS COUNTY COMMENTS JULY 12 2018 1 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=30' CONTOUR INTERVAL 2 FEET O O O O t0 Z OW N W a0J a. 0 Z . LL' z g Lu 00 0 ir J w _ > >aW Jao® 0 2ZW U w2> � r Q QO i o�Jcr w J O � JCL co) aQ LL IT 0 LL FILE NUMBER 8053 I SHEET 5OF7 r 655 650 645 640 635 630 625 615 610 10+00 +20 +40 +60 +80 11+00 o � � N lsti�, tt !� . - :1 . e EXTENDED DETENTION PONDS: O HE L.1 T Irate :;gats Im Project Site Pt ni`p r` o kum ei Date of Last Inspection lri.tae�ctor Cert ner[Ownerr",s Reprvsentative Az-5uffit Plans avail;Me: YIN Facility Typar -, LevO `t °lr tt a hwirote islics xar€ci eairir.l . `t i:€ �>' Pft- reatnien Faci ity' (cheek all E.li,at 1i,( ly) rani Clr.t rets ,,,,r•3i1 Ej Orris fai(ten, f'An x i .. iatt.8 ter rr rr,„�.:eta r ® t iati it Crrtr= t'I���rrauli� a�caftiraic;ait;�.�i:re a 0n -care f aci ty° Off -lane to ii �=xis',+lc� ?tr�Ytitot`g F'riil"s rt;u€af �. fe�.�secta�r� 1�rli�i�I,d�. fi=t? a� .t,�,f,� '�'3 ' tad'�"�t3," to, it I1lg"kr�i €"e��?tFtitj' 3 W li�;r`t dice the �"�� a'�`r4sa•.s4tv�'l� t,�t"di{s";: Ia:�ei$lti, t4tt;-{bf7a'7i�e sfouiC� fes. t�t�tmr'd.'t't;%} "+i dt'=:i ,� f%., Pf `i'.? c'I �'er,. s°i��i ?7:Id-ti�rt'. IV � on&'nutty Gyle nt mg water ;'eve 0 E .1 goP 44l :'11,a e ,4 7`€�i`ac fa'6 TA iYovi o manage its"' ge �'e,�PL-i�ai ',� rya°}rgJF. � a�r� �r�t�."a �!� $;�c� t^t,€eF��vital Kl�a e�rP s�Fl. �#,''� i �4 ! e4:�t€1i?� r�`�' edY;:�'d w" �i°a4tK. d » fl''a inm t�%'b;an w1 ne-edi $ 777xi'i�$aged t'`ariodiaillolvi g til ttl slloxmxa' let ixWe�`f� lVy required w�.1€fag rr'�Br}td� ma ri c r',g ttr, -of-way ay � tfle' ryhaaivner , ifl rm f tti m utf�r 'ct e irt4,"aageB s r; +. a 't'e°'' 4`�`,€`d4"r.trartt) t vw� a° t NtIeryo i) tw,a ((4eN1.:F-re44t.ferit tc t??t. 1+'�r'4 "br s 'farla�7@i'�P'r` ?�s"om, fhc ,fxc,, r'fy ,°.ei+' fy ��-ser yw0 e, CId'. N hr' -u �B.�ya.'a, cil th .a:r.„"em"q t:"paalaty l �d}�" -ia 3. a'5�at: retial to, rnai+74)4 time. f,rrc;t.id t� .r}}a;��partbr713z�n €? •.f�the 9. P rt B 4a£ttlk f a��,4,�rl;iil-0 ryce) Eft �' ds e ram #1�y rjoi � :r{„cidk� red toxic a lnozairi iXK V !?w" AMENDED PROFILE 11 655 9.4 52 +20 +40 +60 +80 orn� - 00ro (0(� Vit itt�8� ti�l"�rtr�° flet° Vii. t �t trig lc�I;a�rJla r�r� 'Iii tax ., P 650 645 640 635 630 625 620 615 610 ANNUAL BMP MAINTENANCE REQUIREMENTS EXTENDED DETENTION ENHANCED • MEASURE SEDIMENT ACCUMULATION LEVELS IN FOREBAY. • MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES. • INSPECT THE CONDITION OF STORMWATER INLETS TO THE POND FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. • INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. • INSPECT POND OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, ETC. • INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION, ETC. • INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION, ETC. • INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. • INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE POND FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY. SEDIMENT FOREBAY • IN GENERAL, SEDIMENT SHOULD BE REMOVED FROM THE FOREBAY EVERY 3 TO 5 YEARS, OR WHEN 6 TO 12 INCHES HAVE ACCUMULATED, WHICHEVER COMES FIRST. TO CLEAN THE FOREBAY, DRAINING OR PUMPING AND A POSSIBLE • TEMPORARY PARTIAL DRAWDOWN OF THE POOL AREA MAY BE REQUIRED. REFER TO THE VESCH, 1992 EDITION FOR PROPER DEWATERING METHODS 15 9-f� -_tat 9, C-64 I�riiiextit.tic�.ltt� IttI�>�fiza �iilri�Ii�� A tli k, h l i", ° of tr es b� ;:i, brua . �,Ii�-�uld int zz�n�ii�ta e J u tht mbai :ill zit, ' a twill 11 StAil ze til �IiifacC' of :II- �=baull� uciit ar4d will�imlll Iii � iasptctioii-. .1�I.a 3 1..ii2ii€rii iit:W a$2ftl i1r I.tt,s:tlC&2r. "",;sitH.Cf hila'' I3t,.S' w d L elwo ,:at`e NOT al.l-inclilsi cc :°2l:i;:ci c tcilittes aia ;gwfe ofiler L11�.:3*$.res llv: discussed ��'rle, t i.'5 the clesi , r' 1°�:5���%tI i I i "tai .ci c l�' itioli,alil1t ._�urt art uecev ;'ary. __l A Thl , rdii3l;:tltl'�tl i ' li uld $ qy d1ii °i---.��s'zl."?.Akall ." t4i.'3 ,-- t3'?*. -,pl • "A itil€� Siia.9� .11, ,:lisliai iil� dial. ,he fps'' elitticii; occurs at th airl (i d%wS;tal i° Ti :tile ;�li tll ilia 6� . atilt t��s than 6 to 2 if €tct scai"y-, t.h tiiilinaiklil;a t should bt lillitd, ;:truliztt.1 and sctcice1 is tllc hill. ti~r:�tcr tlic zt �,'°iiiz ; iCRSlpii. I. ml%� an'd %ttzliZcl 4al�aphe atialr mics whould l.• lis &cd oll 'srial test z°c�,uk"" Tiic f'yv; <aI 4�Ci� "aitou'Kl 6T _ cool- Vile it',4`itla t r it 1`Ifr?711z3 i i :i 3 41 oil ttw �:�Iast Eicticru .3 Ali ei�:sio _at lic-, aotcd rl� dut, tilt ai ms i��W� �� P��t� �1: oul �c ack iltm,d �vitic �csl, "A ruse Nd alid protce tleal (mulched) ed) iititll r t tir�u: i� established, 9. P =.' 4. Ali Iaiu°�, �i�.,t�. at�cl ��:tit�:t ��ia tla�:z;°itl~t�tti`ta�lk` �lt��ttl�i ii:: °,�4� a�rl�` �,�:�:t1acI ai�-1 at'�tc",�i;�€I 1 � 1 1 (muls.Ised),cit' Bat]14.11 is Sta111'117,Cd:t;r �4iltia�aiY� tfil �9�r6v"Slt2ti� for 5. All aaim>il I�>* rro,,w's `�ltou,1� iit txi< :l�f llc i ouid �.OiliPacfed1 allcl Iia rro v iia ; animals Elis -alibi All tt es, ?a`��t"�d elg TATiOtl MIA Other deep' root p -ow 7a,, i37cliiclul W stllnl'n� ' til �i s1li it t t°tili�: vt li}art tltt elli% is tiaa ttt ,aid adja ee tt axta extellditt to wa z�i,° t 25 fcct tick oad the eilal~-wttakLwtiit too ali�l <1liirtlll�t:t �+�1It Ia t�.. T11 roo, sig"t'-ws slip:;.ilii b'� rxtra tcd: and illi �&�aa 'ttcd �'�.� tulle ttpl c d �tIa i e.Qwp' t4 with l't11terial shn laf m thesi7i°t`a�I11ichn-2 .Ii :.i> All �: llirl°; a �� t�at� 1 i;a t�lli '�' 4� at the first .ai I 17 �ali}�r=rraMity, ;Sitatilarly. ally V111c cover Sand I-rius c1i$otilcl bt 'tiira�ved iitni t'lic i2 k 11 iilGilT to allow f6f inspectiot'l'a. 7. Any repairs txi4�,de ta. the I,iitli:pal spillway (jise ` or 1�� rr~ :I) "should be r evic%,Tcc Ery,- 'a cr#� s1a1 eil„iiiec', °xB<i�€c�� ti�tair.l�it3 to expose the barrel 3lioill�l ii_ t be :tlla� k$ �.�.1 I-. ilx1r-l�`i° til . iii°�t i�r� r =e�-�. The ci°cia-�i� side �l� _ � , Ali t lel %. t� _ � - ,;,, � l t f �, � 1 .� I , e s .1�1� �I back at a 2.I �.lc��.e. 1221I1i111113i3;. Virginia Stoltz water AI� nagelnelit xittletboolc Chapter Enc-achm rat arc the overall blllctiogsorotfter ler tltirlcrr ail strmtumr� July 201 PROPOSED HIGH MARSH ZONES ' Add resp �m�i�irrt is FLOOR ELEV=634.00 TO 634.50 Pr��rt�t� a W 2 q2 C, 0 Q 2(0 0� Q " OC W UQ Z = 8� No Z0 � @� wo �w _ U� t/1 OW inftsmr it€�'�ar'ved pt�apes:y` nee 0 11 QO W W ASBUILT 48" RISER W/72" TRASH RACK h?r f s rtat Zo r 3 rry nark the bourldahes tar i t 3€ (SWAP WITH APPROVED RACK ON SHEET 5) Qf il" rec>:ivk"g pet ViGu5 the locality) - 6' arc-�a. as neadad Wow PROPOSED ARMORED Q �F 15 Q " > WEIR OVERFLOW=633.50 QN Z TOP OF DAM=640.00 -� - Z 2 2 ZZ Z o U W2W W a IA�)Z�j > JQ W J Z A3,...... > I OJ� , Horizontal Scale = 1 :20 -" ASBUILT RIP -RAP PROTECTION TO BE REDISTRIBUTED WITHIN Vertical Scale = 1 :5 ' O NEW FOREBAY & OUTFALL TO BE EXTENDEDAS NECESSARY LL Cl)v �� .... _ PROPOSED LOCATION OF SEDIMENT ........................ ...................... DEPTH MARKER CLEANOUT ELEV-630.00 _ ................ PROPOSED SEDIMENT FOREBAY _- - FLOOR ELEV-629.00 APPROX. 20' X 12' 3. CALE 1"5= 5' VERTICAL 94 38� p,S V\L� CORE IN NEW 6" 0 ORIFICE ® PROPOSED LOW MARSH ZONE 635.00 (PER APPROVED PLAN) FLOOR ELEV=632.50 2.5 CORE IN NEW 6" 0 ORIFICE ® o 630.00 (PER APPROVED PLAN) SCALE IN FEET ASBUI T RIP -RAP PROTECTION > LO > ENHANCED DETENTION DEEP ZONE FLOOR > CALE 1" = 20' HORIZONTAL - - 00 ELEV TO REMAIN=628.00+/- - "," J � APPROX. 30' X 20' II M 1- �� m II M zo so I 0 20 ao SCALE IN FEET co --A, %-I, <- Q 9.4 52 +20 +40 +60 +80 orn� - 00ro (0(� Vit itt�8� ti�l"�rtr�° flet° Vii. t �t trig lc�I;a�rJla r�r� 'Iii tax ., P 650 645 640 635 630 625 620 615 610 ANNUAL BMP MAINTENANCE REQUIREMENTS EXTENDED DETENTION ENHANCED • MEASURE SEDIMENT ACCUMULATION LEVELS IN FOREBAY. • MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES. • INSPECT THE CONDITION OF STORMWATER INLETS TO THE POND FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. • INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. • INSPECT POND OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, ETC. • INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION, ETC. • INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION, ETC. • INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. • INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE POND FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY. SEDIMENT FOREBAY • IN GENERAL, SEDIMENT SHOULD BE REMOVED FROM THE FOREBAY EVERY 3 TO 5 YEARS, OR WHEN 6 TO 12 INCHES HAVE ACCUMULATED, WHICHEVER COMES FIRST. TO CLEAN THE FOREBAY, DRAINING OR PUMPING AND A POSSIBLE • TEMPORARY PARTIAL DRAWDOWN OF THE POOL AREA MAY BE REQUIRED. REFER TO THE VESCH, 1992 EDITION FOR PROPER DEWATERING METHODS 15 9-f� -_tat 9, C-64 I�riiiextit.tic�.ltt� IttI�>�fiza �iilri�Ii�� A tli k, h l i", ° of tr es b� ;:i, brua . �,Ii�-�uld int zz�n�ii�ta e J u tht mbai :ill zit, ' a twill 11 StAil ze til �IiifacC' of :II- �=baull� uciit ar4d will�imlll Iii � iasptctioii-. .1�I.a 3 1..ii2ii€rii iit:W a$2ftl i1r I.tt,s:tlC&2r. "",;sitH.Cf hila'' I3t,.S' w d L elwo ,:at`e NOT al.l-inclilsi cc :°2l:i;:ci c tcilittes aia ;gwfe ofiler L11�.:3*$.res llv: discussed ��'rle, t i.'5 the clesi , r' 1°�:5���%tI i I i "tai .ci c l�' itioli,alil1t ._�urt art uecev ;'ary. __l A Thl , rdii3l;:tltl'�tl i ' li uld $ qy d1ii °i---.��s'zl."?.Akall ." t4i.'3 ,-- t3'?*. -,pl • "A itil€� Siia.9� .11, ,:lisliai iil� dial. ,he fps'' elitticii; occurs at th airl (i d%wS;tal i° Ti :tile ;�li tll ilia 6� . atilt t��s than 6 to 2 if €tct scai"y-, t.h tiiilinaiklil;a t should bt lillitd, ;:truliztt.1 and sctcice1 is tllc hill. ti~r:�tcr tlic zt �,'°iiiz ; iCRSlpii. I. ml%� an'd %ttzliZcl 4al�aphe atialr mics whould l.• lis &cd oll 'srial test z°c�,uk"" Tiic f'yv; <aI 4�Ci� "aitou'Kl 6T _ cool- Vile it',4`itla t r it 1`Ifr?711z3 i i :i 3 41 oil ttw �:�Iast Eicticru .3 Ali ei�:sio _at lic-, aotcd rl� dut, tilt ai ms i��W� �� P��t� �1: oul �c ack iltm,d �vitic �csl, "A ruse Nd alid protce tleal (mulched) ed) iititll r t tir�u: i� established, 9. P =.' 4. Ali Iaiu°�, �i�.,t�. at�cl ��:tit�:t ��ia tla�:z;°itl~t�tti`ta�lk` �lt��ttl�i ii:: °,�4� a�rl�` �,�:�:t1acI ai�-1 at'�tc",�i;�€I 1 � 1 1 (muls.Ised),cit' Bat]14.11 is Sta111'117,Cd:t;r �4iltia�aiY� tfil �9�r6v"Slt2ti� for 5. All aaim>il I�>* rro,,w's `�ltou,1� iit txi< :l�f llc i ouid �.OiliPacfed1 allcl Iia rro v iia ; animals Elis -alibi All tt es, ?a`��t"�d elg TATiOtl MIA Other deep' root p -ow 7a,, i37cliiclul W stllnl'n� ' til �i s1li it t t°tili�: vt li}art tltt elli% is tiaa ttt ,aid adja ee tt axta extellditt to wa z�i,° t 25 fcct tick oad the eilal~-wttakLwtiit too ali�l <1liirtlll�t:t �+�1It Ia t�.. T11 roo, sig"t'-ws slip:;.ilii b'� rxtra tcd: and illi �&�aa 'ttcd �'�.� tulle ttpl c d �tIa i e.Qwp' t4 with l't11terial shn laf m thesi7i°t`a�I11ichn-2 .Ii :.i> All �: llirl°; a �� t�at� 1 i;a t�lli '�' 4� at the first .ai I 17 �ali}�r=rraMity, ;Sitatilarly. ally V111c cover Sand I-rius c1i$otilcl bt 'tiira�ved iitni t'lic i2 k 11 iilGilT to allow f6f inspectiot'l'a. 7. Any repairs txi4�,de ta. the I,iitli:pal spillway (jise ` or 1�� rr~ :I) "should be r evic%,Tcc Ery,- 'a cr#� s1a1 eil„iiiec', °xB<i�€c�� ti�tair.l�it3 to expose the barrel 3lioill�l ii_ t be :tlla� k$ �.�.1 I-. ilx1r-l�`i° til . iii°�t i�r� r =e�-�. The ci°cia-�i� side �l� _ � , Ali t lel %. t� _ � - ,;,, � l t f �, � 1 .� I , e s .1�1� �I back at a 2.I �.lc��.e. 1221I1i111113i3;. Virginia Stoltz water AI� nagelnelit xittletboolc Chapter Enc-achm rat arc the overall blllctiogsorotfter ler tltirlcrr ail strmtumr� July 201 G -bb NOTES: AMENDMENT TO WPO201600009 I. DUE TO SIGNIFICANT AMOUNTS OF ROCK BEING LOCATED WITHIN THE APPROVED AREA FOR THE BIOFILTER, THIS AMENDMENT PLAN PROPOSES TO CONSTRUCT AN ENHANCED EXTENDED DETENTION POND USING THE EXISTING SEDIMENT BASIN IN LIEU OF A BIOFILTER, WHICH WILL REMAIN CONSISTENT WITH THE APPROVED DESIGN FROM WP0201600009 BY PROVIDING 50% POLLUTANT REMOVAL EFFICIENCY. 2. ALL DRAINAGE AREAS FROM THE APPROVED PLAN WP0201600009 WILL REMAIN UNCHANGED. 3. SWM CALCULATIONS WERE GENERATED FROM DESIGN PARAMETERS DETERMINED IN THE APPROVED PLAN WP0201600009 SHOWN ON SHEET 3. 4. ALL OTHER DESIGN PARAMETERS EXCEPT THE NOTES AND DETAILS SHOWN HERE ON THE AMENDED SECTIONS OF WP0201600009 (SUCH AS EROSION CONTROL PLAN) ARE TO REMAIN UNCHANGED AND SHALL ADHERE TO THE APPROVED PLAN WP0201600009. 5. REFER TO SHEET 7 FOR APPROVED DETENTION LANDSCAPING SCHEDULE. 6. REFER TO WP0201600009 FOR ADEQUATE CHANNEL CALCULATIONS. �LTx of vl� O � U � Jimmy L. Taggart Lic. No. 22841 Lt "/. _Ss 0 N A L _ �R� `I I Who Wilt HOW to Fix PrWevrt Add resp �m�i�irrt is a w �' 0 U Pr��rt�t� a W 2 q2 C, 0 Q 2(0 0� Q " OC W UQ Z = 8� No Z0 � @� wo �w _ U� t/1 OW inftsmr it€�'�ar'ved pt�apes:y` nee 0 11 QO W W a tS rt B,h1�`� st3r'J h?r f s rtat Zo r 3 rry nark the bourldahes tar i t 3€ V Qf il" rec>:ivk"g pet ViGu5 the locality) g Z arc-�a. as neadad Wow G -bb NOTES: AMENDMENT TO WPO201600009 I. DUE TO SIGNIFICANT AMOUNTS OF ROCK BEING LOCATED WITHIN THE APPROVED AREA FOR THE BIOFILTER, THIS AMENDMENT PLAN PROPOSES TO CONSTRUCT AN ENHANCED EXTENDED DETENTION POND USING THE EXISTING SEDIMENT BASIN IN LIEU OF A BIOFILTER, WHICH WILL REMAIN CONSISTENT WITH THE APPROVED DESIGN FROM WP0201600009 BY PROVIDING 50% POLLUTANT REMOVAL EFFICIENCY. 2. ALL DRAINAGE AREAS FROM THE APPROVED PLAN WP0201600009 WILL REMAIN UNCHANGED. 3. SWM CALCULATIONS WERE GENERATED FROM DESIGN PARAMETERS DETERMINED IN THE APPROVED PLAN WP0201600009 SHOWN ON SHEET 3. 4. ALL OTHER DESIGN PARAMETERS EXCEPT THE NOTES AND DETAILS SHOWN HERE ON THE AMENDED SECTIONS OF WP0201600009 (SUCH AS EROSION CONTROL PLAN) ARE TO REMAIN UNCHANGED AND SHALL ADHERE TO THE APPROVED PLAN WP0201600009. 5. REFER TO SHEET 7 FOR APPROVED DETENTION LANDSCAPING SCHEDULE. 6. REFER TO WP0201600009 FOR ADEQUATE CHANNEL CALCULATIONS. �LTx of vl� O � U � Jimmy L. Taggart Lic. No. 22841 Lt "/. _Ss 0 N A L _ �R� `I I REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE AS SHOWN CONTOUR INTERVAL NA U � a w �' 0 U w W 2 q2 C, 0 Q 2(0 0� Q " OC W UQ Z = 8� No Z0 � @� wo �w _ U� t/1 OW �w Z O c N 0 LL Z 03 � W 04 cc cc Orn CL Uj 24 W O a QO W W Wgoa Zo REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE AS SHOWN CONTOUR INTERVAL NA FILE NUMBER 8053 SHEET 6OF7 � V♦ OJ Q QO W W Wgoa Zo r V CL Z a. 0 �� g Z Wow 0 J_w�H > QwZ Z Z -� - Z 2 2 ZZ Z o U W2W W a 0 > JQ W J Z O��W OJ� CO) LL O LL Cl)v FILE NUMBER 8053 SHEET 6OF7 SCALE 1" = 10' 10 05 0 10 20 SCALE IN FEET lll?� AS,T H op vr� o � r� y Jimmy L. Taggart Lic. No. 22841�110 . ONAL APPROVED SEEDING NOTES FROM WPO201600009 SEEDING NOTE a. ,.-:, w,' .• : v:. P i.': : .'b. e • p..., k.1 „x.J' 'Lv?H' R b__,f. 3 % SL S'W.. .<.., 8 3 £ L '<r:§=_d L'9 £ 18, 3�e': 3, �d E. t wl3 i.R �.L !1"IE 1 L P a�'i§..n3 tiLD'. —f £E%&:' 8 -tid•i YM'�,.3.3 ,:d 3 �k & # L.i'4 :{ to'.'�a28�3_. I': gid' It��1=E:Ta�TIC�I. ALL E"LA,01T hb7.�1Et�! L �,ti�k g 3 � r s��a*�a _ SL,SJ CJLiW �kf4.l i,�t rLx"lt .MI S i- w •, g:. x, 2 4.: mm H '':' b, �.. 'y • : ms,' 1, d°�`' a:' a - E 1=-.: '. 1 � ti I PRODUCT �� E._�.: PLANT A PER �,��LIF".��T�R� _, � ,.. a � � X11 LENT R.�C� .�� �; T �+ H !�' I �" .a R _. 4� I� .M CH£1-��-� MATERIAL, .�. R E A �' .� �'":: �:£EIL WILT. A"��T�i iL�E�%>_E UF�R�,xLTH a Ir1,�L, .�... ERIC TI:E`ish.NP:..�i�'�T .�..H.�—..—* .�F'a a. s. � i. PL.3"� SHALL BE REJECTED. DIREC710INS ON LABEL AT TIME OF PLANTING, NO SUBSTITUTIONS IN SIZE OR, VARIETY OF PLANT MATERIAL SHALL, OCCUR 1, .�� �; SHALL � �°� ,ti� ,w .. � ��� , - � ENGINEER 3. ��TA6ERi=ED PLANTS �Fi�-sLL E SET .I��� THE P{�;�'�TN� PIT JET TF --IE ,���L. PLANT t!��TE�I�£,L. SCALL BEET THE ,��°1I,�dl: �PE._.IFI,L.�ITlCatJ:� AND WITHOUT THE PRIOR APPROVAL � 1= THE E1 �8C1E�R OR -. �� 1:'rcOI�EE{ SETH ONTTAMPEDSOIL. SL71L Etat C ,, ECx FROM THE. PLANTING i�d :�TAE1'�AE;.C�:,:�: DESCRIBED I��� s THE s�.9�-�RE'�T I..�.aU� OF THE A��iER1�.As� �.�'.:£JL���AP'E,A��H�TE:�:T: STANDARD FORNURSERY ST�CKPUBLISHED ��THE AMERICAN SIT SHALL THEN. BE FILLED�R NO THE ROOTS A�,D TAMPED. SUITE � FIELD ANDASSOCIATIONASSOCIATIONOFF �a•L6R�5ER'�'[e1tEP�I, 120 I STREET,,STREET,,N.!:,, :.l1.�E 50H, �€�. THE CONTRACTOR .�H�,L.L �°Ef��F'� ALL DIMENSIONS IN THE. �= S „ 2 CM05 1-071F°v THE ENGINEER OR LANDSCAPE ARCHITECT OF ANY VARIANCE 4_ THE CONTRACTOR SHALL RESTORE. DISTURBED AREAS TO INDICATED FFR 'lA PLAN, FINAL GRADES IF DISTURBED BY THE INSTA.LLA71ON OF 'SHRUBS AND 55: ALL C(C-I ' TAINER STOCK SHALL HAVE BEEN PROPAGATED; IN A TREES. J jX \Z"."111, I 11h._a. VvW& YR.... JLe`9_ds A1;9'1t If i'. ^ 11K I 8 I I.i9'UNK �A d I i I Ic L_A_ ' 9.$hi_.7"'i I ILII".e_', E'41 Awl .. %Jf- k AN AF'RRID��`E,D AQUATIC HERBICIDE WITHIN THE PLANTED AREA.. 5. THE .ONTRACTDFSHALL PROVIDE t AN.T ERING D URINTHE. FIRST GROWING PERIOD.. %. THE CONTRACTOR 15 RESPONSIBLE FOR REMOVING ALL STAKES .AICD n. �. SUPPORT T GUS WIRES USED Tf Ff�+RT �'�1=SAFTER A F'ER10:D OF C+i=JE YEAR, I .. .� ... L 'y .. ,. ... s, A. .. ......... , .' ..... — �— TEMP C1RAppY STAppIL IZ _. !4 R.I LEGEND QUANTMTY BOTANICAL NAME SHALL BE LOCATED AS 100% SECALE CEREALS -- 100to LOLIUM MULTIFLORUM SHALL BE PLANTED 16 100% 1 UROCHLOA RAMOSA AUTUMN BENTGRASS RIVER OATS VIRGINIA WILD_ RYE MISTFLOWER BUTTERFLY MILKWEED RED COLUMBINE ORANGE CONEFLOWER ASH -LEAF MAPLE CANADIAN SERVICEBERRY RIVER BIRCH - ---- COMMON WINTERBERRY - .......... --- ----- - - BLACK ELDER ................... HIOHBUSH BLUEBERRY SOUTHERN ARROW -WOOD WHITE FRINGETREE ................................................................................................... FLOWERING DOGWOOD NORTHERN WHITE OAK SMOOTH BLACKHAW ANNUAL RYEGRASS BROWN TOP MILLET 100°IQ LOLIUM MULTIFLORUM 1ANNUALRYEGRASS FACU FACU FACW FAC - FACW FAC . ......................... FACW FAC .......................... FAC FACW FACU FACU FACW FAC UPL FAC FAC FAC FAC FACW FACW FAC FACW FAC FAC FACU FACU FACU SEEDING DATE NOVEMBER 16 - JANUARY 31 FEBRUARY 1 -APRIL 30 MAY 1 -AUGUST 31 SEPTEMBER 1 - NOVEMBER 15 'a DETENTION AMENDEMENT LOCATE PLANTS AS SEED 1 CALIPER AND #3 CONTAINER MATERIAL SEED MIX SHALL BE #SP4 CONTAINER _._ --- ----- ------------------------- ____ _._._ SHALL BE LOCATED AS APPLIED TO LOCATIONS SEED -- SHOWN ON PLAN AT A SEED SHALL BE PLANTED 16 RATE OF 20 LBS./AC. SEED --- APPLY STRAW MULCH SEED #SP4 CONTAINER AT A RATE OF 2 TONS ...................... .........................................................I BASINS IN ACCORDANCE PER ACRE. SEED SEED SHOWN. SEED > >QwWz SEED T@) SEED pU rLz wo SEED cc� 0 AMENDEMENT LOCATE PLANTS AS #SP4 CONTAINER 1 CALIPER AND #3 CONTAINER MATERIAL — — — #SP4 CONTAINER _._ --- ----- ------------------------- ____ _._._ SHALL BE LOCATED AS #SP4 CONTAINER SHOWN. #SP4 ............CONTAINER MATERIAL #SP4 CONTAINER ---- --------- 11-- SHALL BE PLANTED 16 #SP4 CONTAINER INCHES ON CENTER IN GROUPS OF 15 OR MORE APPLY TO ALL #SP4 CONTAINER BY SPECIES. #SP4 CONTAINER OUTSIDE BIORETENI ION 1" CALIPER j 1" CALIPER V CALIPER' - #3 CONTAINER #3 CONTAINER i #3 CONTAINER #3 CONTAINER 1" CALIPER LOCATE PLANTS AS 1.11 ......................................................... SHOWN ON PLAN, 3/4" CALIPER 1" CALIPER #3 CONTAINER 0 ww SPECIFICATION -- REMARKS —............- APPLY TO ALL SEED DISTURBED AREAS Q OUTSIDE BIORETENI ION SEED BASINS IN ACCORDANCE Q j zo WITH SEEDING DATES SEED SHOWN. SEED -VA REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=20' CONTOUR INTERVAL 2 FEET • U a w � 0 0 ww W 2 Z 0 `0Im N2 cl) Waal Z Q CL 0) Q j zo Z JW J_ w~a. c�cr > >QwWz Cc Lu T@) Z pU rLz wo 00 U cc� 0 J? �Q Z Q UQ w� O8w CO J N 0 z t0 v9 0 0 o 0 L J , LLZ wL 1 1 IX w Z ti 2 Qi (� w OWa Z 0 REVISIONS COUNTY COMMENTS JULY 12, 2018 COUNTY COMMENTS JULY 24, 2018 COUNTY COMMENTS JULY 30, 2018 DATE May 21, 2018 SCALE 1"=20' CONTOUR INTERVAL 2 FEET FILE NUMBER 8053 SHEET 70F7 o� 0 0 Waal Z r o N Z Z JW J_ w~a. 0 > >QwWz J< � � z♦, 00 U W mc/)v Q Q J �Z 0 cc 0 LL cc0 U. FILE NUMBER 8053 SHEET 70F7