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HomeMy WebLinkAboutWPO201300052 Plan - Stormwater 2014-06-11LN r 1 0 i 1 11 HHHHUMUHHH1 C 111111 C F FIA lu V 111111 LmmA 3 BLOCK 1, PHASE B &BLOCK 3, PHASE C EROSION CONTROL & SWM PLAN PRELIMINARY SITE PLAN #SDP 201200054, COLLINS ENGINEERING PLANS DATED 10 -01 -2012 WPO# 2013 -0052 GENERAL NOTES: OWNERS: CRAIG ENTERPRISES, INC.(BLK. 3B) JA -ZAN LLC (BLK. 3C) W P.O. BOX 6156 1150 PEPSI PLACE CHARLOTTESVILLE VA, 23906 CHARLOTTESVILLE, VA. 22901 OWNER /DEVELOPER: MARCH MOUNTAIN PROPERTIES LLC(BLOCK 1) CONTACT. DAVE BROCKMAN U 1005 Heathercroft Circle, Suite 100 OLD TRAIL VILLAGE im J06 Crozet, VA 22932 CELL: (702)- 985 -9088 FIRE RESCUE dave@oldtrailvilloge.com PLAN PREPARER: ROUDABUSH, GALE, & ASSOCIATES N 914 MON710ELLO ROAD VA. DEPARTMENT OF TRANSPORTATION CHARLOTTESVILLE, VA. 22902 TAX MAP PARCEL No: 055EO- 01- 00 -000EO - EX. PHASE B, PROPOSED PHASE C - 1.120 ACRES REMAINING 055EO- 01- 00 -00000 - BLOCK 1 - 4.342 ACRES (REMAINING =1.43 ACRES) Z O 055EO- 01- 00 -000EO - 1.213 AC. OR 52,834 SF.(ORIGINAL PARCEL) Q (EXISTING PARCEL LINE MODIFIED w/ PHASE 38) ZONING. NEIGHBORHOOD MODEL DISTRICT IN ACCORDANCE WITH PROFFERS 2 OF ZMA -04 -024 APPROVED ON SEPTEMBER 14, 2005 EXISTING USES BLOCK 3A,B - 25 TOWNHOUSE UNITS(6 AFFORDABLE) BLOCK 1A - 52 APARTMENTS(1 BEDROOM) W BLOCK 1A - 25,156 S.F. COMMERCIAL BUILDING SETBACKS. ALL MINIMUM SETBACKS FOR RESIDENTIAL & COMMERCIAL ARE 0 FEET. PROP. USE / DENSITY- BLOCK 3C - 12 TOWNHOUSE UNITS cc BLOCK 3C - COMMERCIAL - 15 500 S.F. BLOCK 1B - 26,925 S.F. COMMERCIAL � N BLOCK 1B - 7 TOWNHOUSE UNITS, 18 APARTMENT UNITS BUILDING HEIGHT NOT TO EXCEED 4 STORIES DRAINAGE DISTRICT.• LICKINGHOLE CREEK WATERSHED: S. RIVANNA RESERVOIR TOPOGRAPHY. EXISTING BLOCK 3 TOPO AUGMENTED WITH RGA ASBUILT SURVEY. j UTILITY ASBUILTS FROM COLLINS ENGINEERING PLANS DATED FEB. 28, 2011. BLOCK 1 TOPOGRAPHY TAKEN FORM J. BELL AERIAL SURVEY & COMPLIED FIELD ASBUILT INFORMATION. FIELD VERIFIED BY SITE INSPECTION ON SEPT. 3, 2013. EXISTING CONDITIONS. THE EXISTING UTILITIES AND INFRASTRUCTURE VARIES SIGNIFICANTLY FROM 6 THE APPROVED PLANS. REFER TO EX. CONDITIONS PLANS FOR ASBUILT & COMPILED �._ O� LOCATIONS OF UTILITIES, LATERALS, INVERTS, EXISTING GRADES & STRUCTURES. DATUM. VERTICAL - NAVD 88, HORIZONTAL - NAD 83 PROVIDED PARKING: A SHARED COMMUNITY PARKING ARRANGEMENT EXISTS FOR BLOCK 3 PHASE A & B BLOCK 1 = 188 SHARED SURFACE SPACES, 21 GARAGE SPACES & �1 ONSTREET PARKING SPACES BLOCK 2 = 86 SURFACE SPACES, 78 GARAGE SPACES, 19 ONSTREET PARKING SPACES(HOTEL /ASSIST. LIVING) W BLOCK 3 = 104 POOL SHARED SPACES, 20 ONSTREET PARKING SPACES, 76 DRIVEWAY & GARAGE SPACES 2O SHARED PARKING ANALYSIS USING SHOPPING CENTER DESIGNATION TOTAL SPACES PROVIDED =398 PARKING SPACES PROVIDED(COMBINED BLOCK 1&2 W /SHARE OF 229) 210 SPACES PROVIDED(BLOCK 3 W/ SHARE OF 129L� INCLUDES ONSTREET PARKING SPACES ADJACENT TO EACH BLOCK SEE PARKING SUMMARY AND ANALYSIS PLAN SHEET REQUIRED PARKING BLOCK 1 - 362 SPACES ,.1.. SHOPPING CENTER - BASED ON 4.75 SPACESl1,000 SF. BLOCK 2 - ASSISTED LIVING CENTER = 99� SPPACES INCLUDES NURSING, STAFF & ASSISTED LIVING SPACE(SEE PARKING ANALYSIS) BLOCK 2 - 52 ROOM HOTEL SITE = 52 SPACES INCLUDES RESTURAUNT AN ASSEMBLY REQUIREMENTS BLOCK 3 - 239 REQUIRED(SHARED PARKING AGREEMENT IN PLACE) CRITICAL SLOPES. NO CRITICAL SLOPES EXIST WITHIN THE PRO.IECT LIMITS. FLOODPLAIN. THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS AS SHOWN ON FLOOD INSURANCE RATE MAP COMMMUNI TY PANEL NUMBER 510006 0237 D. EFFECTIVE DATE. FEBRUARY 4, 2005. PUBLIC ONSI TE PUBLIC WATER AND SEWER EXTENSIIONS FOR BLOCK 1 & 3. UTILITIES. SEE UTILITY SPECIFICATIONS & DETAILS EXISTING STORMWATER MANAGEMENT.• EXISTING EROSION CONTROL MEASURES. SWM & EC MEASURES: LANDSCAPING. LIGHTING. SEE APPROVED SDP 2009 -093 "OLD TRAIL BLOCK 3B- FINAL SITE PLAN" & WPO -2008 -0014 "OLD TRAIL VILLAGE BLOCK 3 STORMWATER MANAGEMENT PLAN ". SEE APPROVED SDP 2009 -093 "OLD TRAIL BLOCK 3B- FINAL SITE PLAN" FOR PHASE 1 EROSION CONTROL MEASURES AND DETAILS. PHASE 2 IS INCLUDED HEREIN. SEE WPO 2013 -0052 FOR EROSION CONTROL & STORMWATER MANAGEMENT SEE LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND DETAILS. ALL PROPOSED LIGHTING WILL NOT EXCEED 3,000 LUMENS 2' Q Cj �JZ m a a i ly- 0 z Z U EXISTING DEVELOPMENT AREA PHASE 'A' 4_ 2� 0 o-� rr MARCH MOUNTAIN PROPERTIES LLC. LANE �4� -1.1 5 A r R TIES 11, L PHASE V PF EP GRPc,S E��S P P� �0 S�PR PSE G 1.213 Acres JA -ZAN LLC -� 0 O, 0100\1 15, ?r �e �P 5r�° P P lav Remainder of Block 1 1.43 Acres MARCH MOUNTAIN PROPERTIES LLC. Block 1, 4.34 Acres OLD TRAIL VILLAGE BLOCK 1, PHASE B & BLOCK 3 PHASE C ill = 100' PURPOSE OF THE SITE PLAN THE PURPOSE OF BLOCK 3 IS TO PROVIDE TWELVE 12 TOWNHOUSE UNITS AND INCLUDES UP TO 15,500 S F OF MIXED -USE COMMERCIAL IN PHASE 11. THE PURPOSE OF BLOCK 1 IS TO PROVIDE SEVEN(7) TOWNHOUSE UNITS AND EIGHTEEN(18) APARTMENT UNITS, INCLUDING UP TO 26,925 SF OF COMMERCIAL FOR THE REMAINDERR OF OF BLOCK 1. AFTER COMPLEW70N OF THE SITE PLAN AND MODIFICATIONS ARE COMPLETED TO THE EXISTING PARKING LOT, THERE WILL BE 185 SHARED PARKING SPACES AVAILABLE WITHIN BLOCK 1. THERE ARE 18 ,ADDTIONAL SPACES PROPOSED FOR BLOCK 3, WHEREAS TWELVE(12) SHARED PARKING SPACES WERE PROVIDED WITH BLOCK 3B CONSTRUCTION. SEE PREVIOUS MINOR PLAN AMENDMENTS & LETTER OF REVISIONS APPROVED FOR BLOCK 3B. BLOCK 3B, CURRENTLY REFLECTS A LOSS OF 4 PARKING SPACES FROM THE PREVIOUSLY APPROVED PLAN. REFER TO REVISED PARKING ANALYSIS AND SHARED PARKING AGREEMENTS FOR BLOCKS 1, 2 & 3. THE EXISTING ACCESS EASEMENTS AND SHARED PARKING AGREEMENTS MUST BE REVISED TO CONFORM WIiTH THE EXISTING ENTRANCES, PROPOSED ENTRANCES AND R. 0. W. CONFIGUARATION. SHEET INDEX i 'II • VICINITY MAP SCALE 10=1000 FEET SHEET 1 ---- - - - - -- COVER SHEET SHEET 2 ---- - - - - -- PH. 1 EROSION CONTROL & UPPER BALLARD POND OUTFALL SHEET 3 ---- - - - - -- PH. 2 EROSION CONTROL PLAN SHEET 4 ---- - - - - -- NOTES, DETAILS & NARRATIVE SHEET 5 ---- - - - - -- EC DETAILS & SPECIFICATION t KKA� ,TH OF j+P APPROVED by the Albemarle County s =lGI Community Development Department 5- ,ate ,�- C File �=' �' �►- o�2a` 1 .....�, 2 Chns pher C. M an Uc. No. 031672 01.1 ZONAL E�o� - APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNING / ZONNING Z W ENGINEERING INSPECTIONS W U ARCHITECTUAL REVIEW BOARD im J06 =JZ X00 FIRE RESCUE W � J a W ALBEMARLE COUNTY SERVICE AUTHORITY N r VA. DEPARTMENT OF TRANSPORTATION NQ BLOCK 1 MC/ BLOCK 1 &3C/BLOCK3C BASE.DWG A REVISIONS DATE May 18, 2014 U Z W a. U W U W� W dS> im J06 =JZ X00 `J C0 (YT. W � J a W OUm N r 00 J NQ CO 0 cr W Z O V Q rt W 5� 0 2 OV aZ g W o z � W QUQ �:W cc � N �� UN j �o �0 ., Z 0 L J , W to T^ 6 � Oi �._ O� Z � o ti ` W 2O O ,.1.. REVISIONS DATE May 18, 2014 FILE NUMBER 8053 SHEET 1of5 "_ U Z W a. U �Q J0 .J W� W dS> im J06 =JZ X00 `J C0 (YT. W � J a Y OUm D U J V a Z 0 00 J m CO 0 cr W FILE NUMBER 8053 SHEET 1of5 "_ ri (81 `1201 BLOCK 1 OFFSITE STORM SEWER TO UPPER BALLARD FIELD POND , CONTRACTOR SHALL VERIFY THE LOCATION AND DEPTH OF ALL EXISTING UTILITIES WITHIN THE OLD TRAIL DRIVE CORRIDOR It ���LTH op STORM SEWER PROFILE CONNECTING THE EXISTING SEDIMENT BASIN OUTFALL TO UPPER BALLARD POND, REFERENCES FROM APPROVED PLANS FOR BLOCK 1A (120D) / / `1206, J 120' 120 f ■ f _ ' / tt / EX STORM STD ----------------- �� II N " t8C �I _ _j i I. LI i•2" I PDE EXISTING 0 0. 2% 42" HPDE ® 91% � r\ J O ° z z z BLKI - OFFSITE SCALE 1" = 30' 15 0 30 60 N Li o 0 M c 4 o U-) Eri I� o x z � d- O cV > z ZZX w g W � � � �,.. � O j ,I � �'` � � TOP _680.93 _ 00 Z 00 v C) �. . r Ch'ristophe'r C. Mulligan �1 f J� INV(IN)= 676,. / Lic. No. INV(OUT)= 676.5•/ II l+ > 11 ¢ CO (O 1 03167 j4r Co 6 Z I II II i �';'g sear• ) t 31 E� - - - - - - -_ - - - - 68E>i NAL j J EX. STORM STR. ---- - - - - -- - - - - -- - - - - -- - - -- - - - - -- .J � V J (n (n �, f J / { i,r � � TOP= 683.03 Q. m �� 1 J , •`. NV(OUT) =677. 0 EXISIIN GROUND v, r �� /AERIAL TOPO - JULY 012 O m I L , 1 - - ONO 1 r 1 EX. 12" WIL o 680 ■ 11 Block 8A EXISTING 2 ��STIN EMP. SEDIMENT OUTFALL P PE V LL 18" CLEA R a. C> C) `Z rL t t 0 F 675 �, r _ l ■ � ' Nor al WSE = 672 62 0001 �, r 296 L.F. OF x 1 * 1 42 HPDE d (' 5 L.F. OF �X. °TR. /20/ EX. STORM STR. �11 ® 0.53% CD'`' 10 "� ' ' j EX. STR. TQP= 685,34 ~ . 42 HPDE 1 i oP= 682.75 / av 1 N w� II w 0 0.50% u•, C) 670 !� IN OUT' = 75.31((EX. r �_ ---- -= TOP= 683.23 1 INV IN�77 N = o N N RIP R D =1.5 M N. � IN ((IN) )6 5.24(EX. ")) \NV(OUT)= 679.93 (� INV�Q4" A X -o z 130 L.F. OF / 6 w (\ > > II 42" HPDE to 1 1 / �12 �'�"'� �X�S;�� / \ \ (`�1 16 ) t / \ 8� 1 z z II 0 0.27% I - ' E :H.OT 1 \ ' C � i OUTLET ROTECTION 10+00 10+50 11+00 11+50 12400 12+60 SB##1 ORIG. DESIGN SPECIFICATIONS Sediment Basin 1 DesignY U U r o� drainage area (acre;) 5.87 q 5!¢N HIGH WATES _ basin volumes: (using 2' contour intervals) 0Z> 00 J06 elevation (ft) contour area 40 volume(cy) N v>> 0itW 656.00 1228.0 0 ':i�r:.i J a 658.00 1982.0 3,180 arr srGawc ;:...• ''. ;v: 7°iHQ 660.00 2844.0 8,027 , s L.1. CL (. 662.00 3954.0 14,848 Lq Z �0 U) � 664.00 5146.0 23,422 -4 ...I W 666.00 6438.0 35,452 r ro rrcnn"FD fCO wet storage: wet storage required (cy) (67'DA) 393 design high water �•'1 dewatering orifice elevation (ft) , 660.76 top of dam (ft) 666.4 wet storage provided at this elevation (W) 393 top width of dam (ft) (ft) ! 8.0 656.0 available i,otume befo[e cteanout, ") (33•DA) 194 bottom of basin ..j cleanout Elevation (A) 659 approx. bottom dimensions: 64k32' distance clwanout to odffce (ft) (> 1) 1.9 upstream face slope; 2 :1 (from (L W downstream face slope: 2:1 dry storage: Q� rn4t W Z OW dry storage required (cy) (67'DA) 393 baffles: Yes principle rfpllhnray crest (ft) 663.4 length of flow, L (ft) 72 dry storage provided at this elevation (ay) 787.0 effective width, We (ft) 4838 diameter of dewatering orifice (n) 3.0 L f We (baffles required If > 2) 1.07 diameter of flexible tubing (in) (ori8ce+T) 5.0 collars: Y� runoff depth of water at spillway crest (ft) 7.411 C (use 0.45 for bare earth) 0.45 slope of upstream face (41) 2 tc (min) 10 slope of barrel (Sb) 0.50°x6 I Tyr 4.1 Q Tyr 10.83 length of barrel in saturated zone (Ls) 45.36 125yr ; 6.0 Q 25yr 17.43 number collars required 2 dimension of collars 4.3x4.3 principle spillway: available head (ft) 1.0 emergency spillway: NO diameter riser (in) 30 required capacity (025 -Qp) (cfs) n/a spillway capacity, Op (cfs) 23.0 bottom width (ft) n/a diameter trtsh rack (in) 42 slope of exist channel (ft/ft) n/a barrel length (ft) 44 minimun length of exit channel (ft) n/a head on barrel through embankment (ft) 8.4 crest of spillway (it) rile diameter of banal (in) 24 NOTE: ORIGINAL BASIN DESIGN SPECIFICATIONS FROM - WPO 2008 -0014 As -Built topo for the Existing Sediment Basin - Roudabush, May --2014 01 11 3 FREEBOARD'' ? o o ♦ j P- 670.69 j> X20) I \ �F'�OM YR. WS U U .� IN f IN, 54,1,gyp / [�..mss. I Acres o REG ADE z' > z ♦ IN��OUT)� 6,54.04/ % Basin `' 1 _ z1 1 17 - 17 1 t �65, -/ Q 20 STR. 120 \ \� F t�Ci. Ex. o" RISER' °� �► ■ '� \ �is� (As-Built) / �� �( ,p•... RI RI ,r o ■ ■ ■ ■' IN V {N 6.11 / \ I ELE = 664.17 / r t % e; •. <ti� INV IN =67 1 � ' � � .INV N=675. 6. S. \ t Sf 1 11-1 .�. 1N O =67 OTTOM 661.0 �i �e �. t Y( 660 , d �G ,°'' f, GRAD ENLAR 'XS jSTR. 118 SEDIME T BASIN / :� / T0�- 683.30 / i / �r - 1-- EX. ST EXISTING GRO ND 66� f j / 'INV IN -676. 2Q , 7# M.H. =6- L BAS \ / • - INV IN -: 8 ASBUI T I TOPO / V IN� -67.0 y r s EXIS, 24" RC ROUDABUSH- MAY 2014 ,� / �t I/ r'` o IN UT 76.70 R�� ,' ;' 3� EX. M.H. 0\T 2`. 3 INV(OUT) 48.1'1@ 2.22% 666 7 66� 5 jEX, M.H. LH 1 3 Q )T / f \ ±TOP -687 88 \ �`� 6 i - ; TO P'' =67 .67 e j $ /� \ INV IN) =679. 8, 11 i ° Vy:} r' % INVf IN65 e ' % it f r it I U;T = 62. 4 } NIIV IN} 6 .92 / EX' T �'11�A 1' ° o :'i / V 0 T) 6 6.8 �Xy STORE( STRV, I � `� 1, z_ ° z ' E : 3,Q''�CMP RISER 12 a 'f P 68 _39 $ , U �' TOP,=664,17 a J I V(OU - 1677.14 t r S 105 w to w 660 # NV OU,T) =65 .07 '/ . I \ Q > I I �t remajri�j ` ! f 13•+00 13+60 14+00 14+60 1 / � �� � r � � � 7 � I • ` `� \ , i ,! 1 - i SBA 1) // z , �� / %, i �, <, � Ex st. e l n Basin �; 68 f 1, ( I 4 / , v a r I Dew Irt a n Sc- t / l ! grad Ito �il Cs ' Q i Block aA r, ! 1 i < z j } I ` ■ 'CJ t \TOP -66 5N t I { Q - #' ie # ✓ = = -- \\ , l I Bottom 1_ f ro EX. M.H. -OT 2 -4 E I / Voki =1,8,897 s�.f` . r f Z oo l z = f . ip -1 0 Elew.664.17 j t �� / r i ` (, ; TOP 686.27 l I I i , I � iNV IN 682.77 INV OUT 682. ' # Ii 62 _ EX. STR. #102. E I 1 � � `• � I � - -� _ - �" _ P= 68,6.27 I, 7 6 #s INV(I�N 682.77 II / r -� 2.1 ' t I I E INV(¢ T� =6 2,62 MANHOLE ,1 � ; ' • • . , • ; . _ `-• •. . _ � � ; 1 I '�,, ` _ - -I . ___ -_ - � 3 2 / - ! NV IN)= 665.07 6 \ UT)= 657,82 ' ■ TOP, = 678,14 INV IN)= 664.34 I INV�OUT) =664 2 l a 61) i I i i / / + i ~" � -''`F r j� � ``ham � \ I ., \ I 3 I i t _ _ -'_ ""^ _ .-.. _ - i t •� , , ' _; I I I "II EX. STR. 100 TOP =68 ,34 INV(QUT= 683;14: IP - - -- ( - - _ - -- EX. M.H. 0T 2 -5y r - - ♦ \ ,�; \ 1 j' f INV IN) 681.52 INV�OU )=681.22 ♦ ' / \ q EX. M. H. LH 1 -14A ; ___- • LIMITS OF DISTURBANCE TOP =689 95 F II + I 9 ° NV(IN)=675.25 IN)= 675.25 ■ - - --- 9 INV�OUT)= 675.05 ♦ ♦ _- - -- % - -� Fi -I ♦ ♦ ♦ ♦ -_ ---�" _" " - __. I .° ' 120 � .. -- _ �� �_ _ µ- . ;,,• ; � `I• ,,' `I � . • _, # ���, -�' , � ^� ' :� ♦ ___ yIf ♦ _ LIMITS F DIS RBAN -680 -� �g„_ ,•� , cam - � _ - ..- _ -- ` '' � ♦ 120 � I � _ OL --- - _ _ - -- o j ,.-- "RC� D TRAIL DRIVE x-680 --- - �t�� i ___� -- _ .... ,. __ - --_ - . - . .. -~' . ... w.. __- _ _: r -� ' w_ _. _ -. :.__. .._,_ "� " � Pic• �,,�•' - - .._ _ ; - - - ._ _ . INV. (OUT) � r1Tr nT1 r1 A 1 1"f C n 1 C 1 ^ A T1 �'1 A 1 C� INV(IN)= 669.27 ^ z.36 /..:. \ IJUTLET Pf ,` �,� "PROP. '�' � EN ?ION � \ 8' -v �- Perrr�anent P �� - 1, 002 , 004 c.f. ti• _ ; �NormSE = 672.6 0 P / Dpi { C yr. WSE = 672:$3 ` ' �'C ' ■� 10 r. WSE = 673.70 ' i t ; APRON LENGTH = 22' 30 C.Y. CL I RIPRAP �18" MIN. DEPTH. (W /UNDERLYING F.F,� UPPER BALLARD CULVERT OUTFLOW o F-- 42" Q10 13.5 cfs ALL INFORMATION SHOWN OUTSIDE THE DISTURBANCE AREA WAS DESIGNED USING APPROVED COLLINS ENGINEERING PLANS FOR BLOCK 1 & BLOCK 3; WATER QUALITY, THE EXISTING STORM SEWER 8c MS -19 WAS DESIGNED IN ANTICIPATION OF THIS DEVELOPMENT I € i f l f SCALE 1" = 30' 30 15 0 30 60 SCALE IN FEET A I REVISIONS DATE May 18, 2014 Scale 1 " = 30' U U a U. _j 1 0 � w U J >m 0Z> 00 J06 W N v>> 0itW a lq N Q Ica J a JV 0 ,- U� cc =W^ �W;o CO L.1. CL (. a V Lq Z �0 U) � Q ? 0 r,0 -4 ...I W Q UQ r_ w 8 (%� J O -j N Z� Urn N �o UjQ ..j W o� 0 � _5 o W W (L W Zti 24 CD Q� rn4t W Z OW = d REVISIONS DATE May 18, 2014 Scale 1 " = 30' FILE NUMBER 8053 SHEET 2 of 5 U J _' W 0 le U. _j 1 0 � U J O or 0:5 ZD J >m 0Z> 00 J06 Za'o Q oC 0itW a � 0 � �Q wm J a JV 0 ,- 0 JJ cc =W^ CO L.1. CL (. D FILE NUMBER 8053 SHEET 2 of 5 Mcx* 8D CRO - - HATCH DENOTES l � % __ %a ,. ••-'- 0 RLAY AREA FOR PA MENT OPEN CUT • I \� W lo f CROSS -H TCH DENOTES -10� SEE DETAI Bck 2 I� OVERLA AREA FOR,-/ � SF y Temp. Sediment Basin Outfall / \ � PA MEN OPEN * *Exist. 24 1 / See WPO Plan for Exist. Basin Location SEE I � 1 / and Permanent Outfall into Upper Ballard __- x Feld Pond, previously approved and i/ / , 1 j (114- - OW7 C2- __ designed for this Development Area. / ` -- »` _, i * ** Storm Sewer from Str120- Str120H \ / ,. �,,,..�� _` 6, �� � T X15 , , /� is replicated for reference purposes only. f »._ - " EX. 12- DI W -L - - -- Refer to WPO 2008 -0014 for original design. G.V. -� 6g 6 811 GI. V. • / / / J I, " j! ! ` / \ \ ,- �I N / 1 T D-1 / V�, /!! 1 l;. -ry ' �, ,a„ --"• F i w / ' _.f >i ! ♦� Na! , 1 f /j j % /' ;!` T { " • `/ ` ! 7 '~ / F � ' t YJf; ., 7 ii• , ' , `j`' t T ? , { , S (.if A '} •Y! } ^ \I z' ✓r - E ' 'r_f _ ">i' ' > `� `<.' Z' ,=-- . 1 > .± , ' , / , r ti` >' l % :_ } f ' 10 (120 ) 6( 12 16) IP I Acres , IP to Sod. Basin ' f ,`.'. iS ' "'._r E• "-t ^ f 20,,� (am- Bunt) p: s -. - 5° ( (j / -/' 23 { I v � EX, 6" TEE EX. 6" GATE - VALVE ' l` r } EX. F. H. ASSEMBLY j t� J "' I __�• E S . ttk J 1..•'C " zj ,1 1. tt - I F . ,• • I 1,1)� 15} `j ye ,, »i JJ '3 y _ '• `_ // 'j' // •'+ f i } i f \ , ,> j 694 108) ..._. E r ' ;� , ENO& 1A / �i "� ✓� r >, 1 _ 06 , t �,�•' m I 1 LIMITS OF-, DISTURBANCE (107 7 / 105 • -� 5 v ', /1 � ,y /// may/ � ,•/ ; /� � � E � ; + I ` ff ^i EX. s I 1 ry 1 cc f t/ \\ j C ' f / d I i { 1 BIOOIC aA / 17, :w 6 / � , 3 ; � :� � "z I- rE� j '• w ii { i ' IP ,.� r f � ! "' r ,l FFE 691 -� i 696 • I jj , 3'7 `+ :E , `__". __ \- ! - f)Y __ - 3 , I 33 j/ ._ f_ r i ` . ,. -.... y i it:J ii;> 4 TP s 1 4 r 1 € . FFE = 692.43 8 1% i 1p SF FFE 692.42 > _ _ -� t ( ' i js C_2 'F � � �4 f 7 7 w1 - _.......___ _ ..._ _ . -. .rf__ ..5 ......_. _..,_- • ._ ♦ _ :• , i I# -- } I -I i j I ■• i Y� I J W yr^ v ^- ^^t~ y' ;FFE 693.10 _ - rr IP t II I i W FFE 693.09 } 7 is } \, ...,,_,..... ......, ....,.,.... _. ........... +... , € I s ` I i- ; sl FFE - __692.43 O »- IP r } } � � f (y ' S /' IP �YI .. � J ' .. ..,✓ � f ! �q t' ;3 ' - • IP In 6' 01 W17 a: it LLJ _ I F41MIT$ �F7 'W RBAN / \ , E I E f j/ 1 - - t S ` 674 » 'SF r � �, _.__ � � _____ � �, . � � c -- - �4u -�� w�DrrH PuB�c ww � OLD TRAIL DRIVE J-,-- OLD TRAIL DRI I �- t -�- _ -! �- T -� 6 -2 �- - ---- �/� _ I f I ( ) VAR1NB�E w10TH PuBUC �_ _► EROSION CONTROL NARRATIVE CONT'D VIRGINIA E'�S H�1NDB0 - CHAPT�'R 3 " _ EROSION CONTROL NARRATIVE \ �� - / �� BEGIN CONSTRUCTION :'„ �LTH OF I I `- --� PRIOR TO CONSTRUCTION i 1.) CONTRACTOR SHALL THEN INSTALL CONSTRUCTION ENTRANCE, SILT FENCE AND INLET QUANTITY ON NO. TITLE KEY SYMBOL THIS PROJECT 3.01 SAFETY FENCE SA -X-X- IN PLACE 3.02 TEMPORARY STONE CE GRADING. I 1 EACH BASIN„ SO AS TO CONVEY ALL RUNOFF INTO CONSTRUCTION ENTRANCE Christopher C. Mulligan TOP OF DAM ELEVATION SHALL BE PERMITS AS REQUIRED BY THE STATE DEPARTMENT OF ' 3.) 3.05 SILT FENCE SEE PROPOSED ENVIRONMENTAL QUALITY(DEQ). 1, 730 L.F. 3.07 STORM DRAIN I P O -�- 20 EACH 4.) INLET PROTECTION �{ �G THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING 3.08 CULVERT INLET CIP O CONSTRUCTION. A PRECONSTRUCTION MEETING WITH THE 5.) PROTECTION Q� (J' 2Lo U 0 ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE 3.09 0 DD No ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 DIVEROION DIKE I +� 30 15 0 30 60 3.12 DIVERSION DVS. DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT W l_ C 312 TEMPORARY SEDIMENT BASIN SB ® MODIFY 3.18 OUTLET PROTECTION OP 1 EACH 3.27 TURBIDITY CURTAIN TC C E) e- 80 L. F. 3.32 PERMANENT SEEDING PS 1.0 acres --= 3.38 TREE PRESERVATION TP O �-�-- AND PROTECTION DISTURBED ACREAGE 3.8 acres �LTH OF I I `- --� PRIOR TO CONSTRUCTION i 1.) CONTRACTOR SHALL THEN INSTALL CONSTRUCTION ENTRANCE, SILT FENCE AND INLET OBTAINED FROM THE EROSION CONTROL (6 -3) \ / PROTECTION AS THE FIRST STEP OF LAND DISTURBING ACTIVITIES AFTER BASIN Vol I i i 1.) CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE _ - » - �-- i f RECONSTRUCTION. ' C' IN PLACE RIGHT -OF -WAY (VDOT,,.LAND -USE PERMIT). „ ' 2.) CONTRACTOR SHALL COORDINATE INSPECTIONS,'AS REQUIRED BY THE COUNTY OF GRADING. 2.) CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP BASIN„ SO AS TO CONVEY ALL RUNOFF INTO ALBEMARLE. Christopher C. Mulligan TOP OF DAM ELEVATION SHALL BE PERMITS AS REQUIRED BY THE STATE DEPARTMENT OF ' 3.) BEGIN CLEARING, GRUBBING AND FINE GRADING OPERATIONS AS NECESSARY TO Lic. No. SEE PROPOSED ENVIRONMENTAL QUALITY(DEQ). OTHER EC MEASURES AFTER APPROVAL ^MA P\IAl/\ ACHIEVE FINAL GRADES. 031672 �w °�' 3.) CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM 4.) AFTER SITE HAS REACHED SUBGRADE CONDITIONS, INSTALL UTILITIES, STORM SEWER �{ �G THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING AND BEGIN BUILDING CONSTRUCTION IONAL CONSTRUCTION. A PRECONSTRUCTION MEETING WITH THE 5.) PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED Q� (J' 2Lo U 0 ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE W 0 AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF SCALE 1" = 30' ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 Q4 I THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO 30 15 0 30 60 02 J , HOURS FOR COORDINATION AND SCHEDULING OF w DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT W l_ C M rW7 PRE - CONSTRUCTION MEETING. a W I I FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS SCALE IN FEET 4.) CONSTRACTOR SHALL DEWATER AND ENLARGE THE EXISTING THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. SEDIMENT BASIN LOCATED BEHIND THE POOL (BLOCK 3A) AS 6.) AFTER SITE IS STABILIZED AND PERMISSION IS OBTAINED FROM THE EROSION CONTROL GRADED TO PROVIDE THE REQUIRED STORAGE FOR THE ASBUILT INSPECTOR, CONSTRUCT THE UPPER BALLARD PIPE OUTFALL FROM THE EXISTING DRAINAGE AREA. THE EXISTING RISER AND BARREL SHALL REMAIN SEDIMENT BASIN TO UPPER BALLRD POND. AFTER COMPLETING PIPE INSTALLATION, IN PLACE AND MADE ACTIVE UPON COMPLETION OF SEDIMENT BASIN INSTALL OUTLET PROTECTION AND DISCONNECT THE TEMP. PIPE FROM THE SEDIMENT GRADING. THE BASIN SHALL HAVE A MINIMUM BERM WIDTH OF 6' BASIN„ SO AS TO CONVEY ALL RUNOFF INTO UPPER BALLARD POND. CLOSE THE AND THE TOP OF DAM ELEVATION SHALL BE RAISED TO 667.55, EXISTING INLET OPENING AT THE 24" OPENING AND REMOVE TEMP 24" RCP. SINCE THERE IS NO EMERGENCY SPILLWAY. SEE PROPOSED 7.) REMOVE SILT FENCING, INLET PROTECTION AND OTHER EC MEASURES AFTER APPROVAL ^MA P\IAl/\ C MP1 Irl!\ATI!\AI['• AAIPI PIP rAll � w o Oil \A TLIr' r* RI C]nAl \ /iAITAI 1KICnrnrnn � VI \r1LJl1 V V, Jf -LV II 1\jr%11\l17J mrq LJ L/L. I r% J. 1 1\v 1 1111_ L.1 '1 ♦11 \VI`IIYIL.1 I I r-\" 1114 J1 L\. I%Jl\. , DATE May 16, 2014 Scale 1 " = 300 U ZZ g � W CL n �J a 2 � O3:Z U cc (f) z > Ir �J > m z OJZ ill J = �_ W r Z Q 01° NQ N(1) ca � 0 2� 0� O .• W r W 00 w o TO v1 � rL � JZ W r� `� N W OO Q� (J' 2Lo U 0 W 0 I N �O Q4 ..j Co �0 Uj 02 J , j� w LL 0 W l_ C M rW7 W a W O 4 V) T W Z O W = a DATE May 16, 2014 Scale 1 " = 300 FILE NUMBER 8053 SHEET 3 of 5 U ZZ g � W CL n �J 0 2 �() O3:Z 0 cc (f) z > Ir �J > m z OJZ �r J '0'^Z V, 0 m �U JO 001 cc z WO OJ N(1) ca � 0 2� O .• W FILE NUMBER 8053 SHEET 3 of 5 DATE May 169. 2014 Scale As Shown V lr 1 EROSION AND SEDIMENT CONTROL NARRATIVE a � T CONTROL MINIMUM STANDARDS EROSION AND SEDIMENT PROJECT DESCRIPTION MANAGEMENT STRATEGIES 1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN THE PURPOSE OF THIS PROJECT IS TO CONSTRUCT NINETEEN SINGLE FAMILY ATTACHED ? ;fc� 6ON5TRUC;TION I - DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE, TEMPORARY SOIL STABILIZATION DWELLINGS, 2 MIXED -USE BUILDINGS AND 2 COMMERCIAL BUILDINGS. THE CONSTRUCTION PLANS ARE TO PROVIDE PUBLIC UTILITY SERVICES, ASHLAR AVENUE 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. T,CCES J 3„ S t -2a ANT"fj�, r OTI � (�(�f �lry SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT SHALL BE APPLIED TO CONNEC110N(BROOKLEY EXTENDED) FROM CLAREMONT TO OLD TRAIL DRIVE AND 0Q t ` ' I -t AA F l,� WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION m g ZD -- AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. SUBSEQUENT SUPPORTING INFRASTRUCTURE. ALL EXISTING AND PROPOSED RUNOFF 2. THE CONSTRUCTION ENTRANCE WILL BE INSTALLED AS THE FIRST STEP, FOLLOWED BY _ CONTRACTOR SHALL ESTABLISH A STABILIZED SITE, AND NOT ALLOW ANY EROSION OR SEDIMENT TO EXIT. FROM THE DEVELOPMENT WITHIN THIS SECTION WILL OUTFALL TO EXISTING TEMPORARY INLET PROTECTION AND PERIMETER SILT FENCE. ALL DENUDED AREAS SHALL BE SEEDED 2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED SEDIMENT BASIN CONSTRUCTED WITH BLOCK 3A, AND LOCATED BEHIND THE POOL. AND MULCHED IMMEDIATELY FOLLOWING INSTALLATION. � OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR THE AFTER THE UPSTREAM RUNOFF TO THE BASIN IS STABILIZED, THE DRAINAGE WILL BE �+ TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS PIPED TO EXISTING UPPER BALLARD POND, AS DEPICTED ON BLOCK 1 AND 3A PLANS. 3. TEMPORARY SEEDING OR OTHER STABILIZATION WILL FOLLOW IMMEDIATELY AFTER GRADING. PROFILE BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. UPPER BALLARD POND MUST BE CONVERTED AND CERTIFIED AS A BMP, AND THERE IS Oo THERE ARE NO SOIL STOCKPILES TO BE LOCATED ONSITE. ALL EXCESS MATERIAL TO BE HAULED TO AN APPROVED CURRENTLY A BOND IN EFFECT FOR ITS IMPLEMENTATION, AS DEFINED IN THE ORIGINAL 4. THE CERTIFIED LAND DISTURBER SHALL BE RESPONSIBLE FOR THE INSTALLATION AND STORMWATER MANAGEMENT PLAN FOR BLOCK 10. CURRENT ASBUILTS OF THE POND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE VOLUME INDICATE THAT THERE IS 2,200,000 CUBIC FEET OF WATER QUALITY 70' M h PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A POTENTIALLY AVAILABLE FOR TREATMENT. A CONSTRUCTION ENTRANCE, SILT FENCE 5. WITHIN 30 DAYS AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL £ < ;1 �fsttJ�11s33`a � Pi It PA�ig GROUND COVER IS ACHIEVED THAT, IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION, ON ALL DENUDED AREAS. AND INLET PROTECTION SHALL BE IMPLEMENTED AS THE FIRST STEPS TO DIRECT ADMINISTRATOR THE TEMPORARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP Au4: �a CONTRACTOR SHALL ESTABLISH A VEGETATIVE COVER SEDIMENT LATENT WATER FROM THE DENUDED AREAS TO THE EXISTING SEDIMENT OR REMOVED, AND ANY SEDIMENT TRAPS OR SEDIMENT BASINS CAN BE CLEANED OUT OR J 4. SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND - DISTURBING BASIN. THERE IS APPROXIMATELY 3.1 ACRES REMAINING ON BLOCKS 1 &3 TO BE DEVELOPED; ALL LAND DISTURBING ACTIVITIES HEREIN ARE SURROUNDED BY EXISTING CONVERTED TO PERMANENT STORMWATER MANAGEMENT BASINS. i ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. EXISTING SEDIMENT BASIN IS LOCATED TO ACCEPT THE ENTIRE DENUDED AREA. CONVEYED BY EXIST. STORM SEWER. PAVED ROADS AND STORM SEWER WHERE EXISTING RUN -OFF IS CONVEYED VIA CONNECTION TO THE EXISTING STORM SEWER SYSTEM AND APPROVED UPPER BALLARD PERMANENT STABILIZATION _ '�1'',` `� fi "' f "���'`I , t j' 1 >,t.I•.K I c ! ayo 5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS, IMMEDIATELY AFTER INSTALLATION. POND OUTFACE UNDER OLD TRAIL DRIVE.' ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH STRAW & SEEDING'. .F EXISTING SITE CONDITIONS CONTRACTOR SHALL INSPECT EROSION CONTROL MEASURES AFTER EACH RAINFALL EVENT. IMMEDIATELY FOLLOWING FINISH GRADING. SEEDING SHALL BE DONE WITH KENTUCKY 31 TALL 6. SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE CURRENTLY THE DISTURBED AREA IS MOSTLY OPEN, GRAVELD, ASPHALTED OR GRASS, FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF +14U�' ExrFlyo 'h"I'D'}I � f�- ;'rfv� �zl��it,t�c;r TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN, MULTCHED AND LANDSCAPED. THE EXISTING SEDIMENT BASIN IS CURRENTLY RECIEVING THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER AND LIME FIJI$ SEDIMENT BASIN IS EXISTING, AND CURRENTLY RECIEVES SURFACE DRAINAGE FROM THIS SITE. THE SITES RUNOFF, AND WILL CONTINUE TO DO SO THROUGHOUT CONSTRUCTION.. THE APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST RESULTS. PLEASE ALLOW 6 01° li,Cftt ; PIl } k t�IF �S {AT:c� °� I�c:trPtP, ±. raH:t'l�`C A. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER INSTALLATION AND MAINTENANCE OF THE SILT FENCE AND INLET PROTECTION MONTHS FOR SOIL LIME TREATMENT TO ELEVATE THE PH VALUE IN PREPARATION FOR SOILP�� ACRE OF DRAINAGE AREA AND THE TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN THROUGHOUT CONSTRUCTION IS CRITICAL TO PREVENTING SEDIMENT LATENT RUNOFF STABILIZATION. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT AGAINST RILL PLAN THREE(3.0) ACRES. SEE SIZING TABLE FOR DIMENSIONS. FROM EXITING THE SITE. THERE ARE ALSO SMALL PORTIONS OF THE ADJACENTLY EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL ENHANCE SEED GERMINATION. CRIMPING, THERE ARE NO SEDIMENT BASINS PROPOSED, BUT THE EXISTING BASIN SHALL BE ENLARGED TO MIN. REQ'D VOLUMES.. GRADED, BUT STABILIZED AREAS THAT DRAINS TO THE SEDIMENT BASIN. THERE IS A PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW B. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE LARGE EXISTING WET POND TO THE WEST OF OLD TRAIL DRIVE AND ADJACENT TO THE MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. AREAS GREATER THAN OR EQUAL TO THREE ACRES SHALL BE CONTROLLED BY A SEDIMENT SEDIMENT BASIN. THIS EXISTING POND SHALL BE CERTIFIED AND CONVERTED INTO THE I II ' BASIN. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC BMP FOR THE DEVELOPMENT, VIA CONSTRUCTION OF A STORM SEWER PIPE, PREVIOUSLYr TO ;:SEMI {, FyT YARDS PER ACRE OF DRAINAGE AREA. THE OUTFACE SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN DURING A TWENTY -FIVE YEAR STORM OF APPROVED WITH BLOCK 3A. ULTIMATELY, UPPER BALLARD POND WILL BECOME THE FUNCTIONAL BMP FOR MUCH OF THE DEVELOPMENT WITH IN THIS WATERSHED. STORMWATER RUNOFF CONSIDERATIONS �`- ;.,... - �- --�:,, -..emu- x :-.- � .•. -- � - .- .:- .,.;;�,,,T�.; ,, , ;� _ _ - 24 -HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL ADJACENT AREAS CALCULATIONS OF RUNOFF BEFORE AND AFTER DEVELOPMENT INDICATE THAT THERE WILL BE CORRESPOND TO A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST OLD TRAIL DRIVE FORMS THE WESTERN BORDER, TRIBUTARIES OF THE LICKINGHOLE A NET INCREASE IN RUNOFF VOLUME AS A RESULT OF THE INCREASE IN THE IMPERVIOUS Fi�TE WHILE THE SEDIMENT BASIN IS UTILIZED. CREEK LIE TO THE NORTH. BLOCKS 1, AND 3 OF OLD TRAIL VILLAGE SUBDIVISION LIE SURFACES FOR THE DEVELOPMENT. THE SITE, CURRENTLY CONVEYED BY STORM SEWER TO A SECTION A--A THE DRAINAGE AREA HAS BEEN FILED VERIFIED, AND THE EXIST. SB SHALL BE ENLARGED PER SPECIFICATIONS.. DOWNSTREAM TO THE EAST. AN EXISTING SEDIMENT BASIN, SHALL ALSO OUTFALL HERE THROUGHOUT CONSTRUCTION. 7. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE OFF -SITE AREAS EARLIER BLOCK 3 PLANS INDICATED THAT EXISTING STORMWATER MANAGEMENT PONDS OR nultil>ltult water trll� c�fl iliclt 1nut be ittstallecf 4`itll it 1t111tl1t1t1111 l i11c11 l�allcc�el� EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT NO CONSTRUCTION OUTSIDE THE LIMITS OF CLEARING AND GRADING SHOWN IS BMP'S ARE PLANNED FOR WATER QUALITY TREATMENT WITHIN THIS WATERSHED, AND HAVE STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE REQUIRED. ANY SURPLUS OR SHORTAGE SHALL BE BROUGHT TO OR OBTAINED FROM A BEEN DESIGNED TO TREAT AND RELEASE THE RUNOFF AT THE RATES SPECIFIED IN VA S1111(offt aloe �ttpplyhlf, a Ntiaslt lxoe Nvitlt a diatuetei of 1,5 iltc1m fc!r adequate PROBLEM IS CORRECTED. SITE WITH APPROVED E &S MEASURES IN PLACE. ALL EXCESS MATERIAL SHALL BE 10.1 -561. REFER TO THE EXISTING UPPER BALLARD STORMWATER MANAGEMENT PLAN FOR co stallt plessllte. �`Ta It eater 111utit Lie crlttiecl a� a }' fi+�nt the entliiure t+a all THERE ARE NO STEEP OR POTENTIALLY EROSIVE AREAS LOCATED ON THIS SITE.. HAULED TO AN APPROVED SITE WITH ADEQUATE EROSION CONTROL PROlEC110N. BMP LOADING, DESIGN SIZING, CALCULATIONS, AND DESIGN DETAILS. IN PARTICULAR, UPPER appi6ved settl4n at-et1 to lcniove C411e11t, ill eclll11C11t sllclll �)� plevented ft'0111 8. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN BALLARD POND WAS SHOWN IN THAT PLAN, AND THE PARTICUALAR DEVELOPMENT AREAS ellte6m st+m11I diauls, ditclies ol: watelcotlrse�. ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. SOILS WERE ROUTED TO MEET THE REQUIREMENTS AS SET FORTH FOR THIS AND ADJACENT BLOCKS SITE RUN -OFF WILL CRONIINU E TOOBEAPICKED-UP & VIA EXIST. STORM SEWER SYSTEM. 5B BELVOIR LOAM OF DEVELOPMENT. REFER TO COLLINS ENGINEERING PLANS CITED ON COVER SHEET. PAVED WASH RACK ADEQUATE D RAINAGE OTHER PROTECTION LL - - 2� TO 7� BE PROVIDED. SOIL IS DEEP, GENTLY SLOPING AND SOMEWHAT POORLY DRAINED, AND HAS A MAINTENANCE THERE ARE NO CRITICAL AREAS ONSITE. SEASONABLY HIGH WATER TABLE. SLOW PERMEABILITY WITH A LOW- MODERATE WATER 10. ALL STORM SEWER INLETS THAT ARE MADE DURING CONSTRUCTION SHALL BE PROTECTED SO CAPACITY. GENERALLY SUITABLE FOR ROAD FILL MATERIAL. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND THAT SEDIMENT -LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT. SURFACE RUNOFF POTENTIAL IS MEDIUM AND EROSION HAZARD IS MODERATE, WITH SOILS HAVING SHRINK -SWELL POTENTIAL AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: FENCING AND ARMORING INLET SHALL BE PROTECTED WITH INLET PROTECTION TO PREVENT SEDIMENT FROM ENTERING THE PIPES. 11. BEFORE NEWLY CONSTRUCTED STORM WATER CONVEYANCE CHANNELS OR PIPES ARE MADE 25B -DYKE SILT LOAM - 2% TO 7% 1. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL BUILDUP. IF THE OPERATIONAL, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT SOIL IS DEEP, MODERATELY SLOPING AND WELL- DRAINED, AND IS IN HYDROLOGIC GROUP B. ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS TO PREVENT TRANSPORTATION OF LT OF CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL. SOIL ONTO THE ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A p f� THERE ARE NO CRITICAL AREAS ONSITE. 12. WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE PERMEABILITY AND WATER CAPACITY ARE MODERATE. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. WASH -RACK MAY BE REQUIRED. oA VA ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST 2. THE EXISTING SEDIMENT BASIN SHALL BE INSPECTED FOR SEDIMENT BUILD -UP AND EXTENT POSSIBLE DURING CONSTRUCTION. NONERODIBLE MATERIAL SHALL BE USED FOR THE CRITICAL EROSION AREAS SEDIMENT SHALL BE REMOVED AFTER EACH SIGNIFICANT SEDIMENT PRODUCING RAINFALL �. CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS, EARTHEN FILL MAY BE USED FOR THESE STRUCTURES NO CRITICAL EROSION AREAS EXIST ON THE SITE. PARTICULAR CARE SHALL BE TAKEN EVENT OR WHEN THE SEDIMENT LEVEL REACHED TO -18" BELOW THE SNORKLE. IF ARMORED BY NONERODIBLE COVER MATERIALS. THERE ARE NO CRITICAL AREAS ONSITE. 13. WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ON THE CUT & FILL SLOPES TO ENSURE ADEQUATE VEGETATION IS ESTABLISHED AS QUICKLY AS POSSIBLE TO MINIMIZE EROSION. 3. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR Christopher C. Mulligan DRIP LINE Lic. No. 031672 w4 �010�1 ANY SIX -MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF EROSION AND SEDIMENT CONTROL MEASURES CONTROL OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE NONERODIBLE MATERIAL SHALL BE PROVIDED. THERE ARE NO CRITICAL AREAS ONSITE. UNLESS OTHERWISE INDICATED ALL AND STRUCTURAL EROSION AND FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL 19IONAL E� 14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM SNOW FENCE LIVE WATERCOURSES SHALL BE MET. TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE -HALF THE THERE ARE NO CRITICAL AREAS ONSITE. SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE CONTROL HANDBOOK, LATEST EDITION. THE MINIMUM STANDARDS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS SHALL BE ADHERED TO UNLESS HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT fl�lui 15. THE BED AND BANKS OF A WATERCOURSE FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING WATERCOURSE IS COMPLETED. OTHERWISE WAIVED OR APPROVED BY A VARIANCE. GRADE, PREPARED, AND SEEDED. "' THERE ARE NO CRITICAL AREAS ONSfTE. u 16. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN STRUCTURAL PRACTICES 4. DIVERSION DIKES SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE ADDITION TO OTHER APPLICABLE CRITERIA: DIKE, FLOW CHANNEL, OUTLET, OR SEDIMENT TRAPPING FACILITY AS NECESSARY. ONCE A. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME. 1. TEMPORARY CONSTRUCTION ENTRANCE (3.02) - A TEMPORARY CONSTRUCTION EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEASURE B. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. ENTRANCE SHAM BE INSTALLED WHERE THE ACCESS ROAD INTERSECTS WITH SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED. DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF BOARD FENCE ' C. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN CLAREMONT LANE.. 2. SILT FENCE BARRIER (3,05 ) - SILT FENCE BARRIERS WILL BE INSTALLED EACH WORKING DAY. =• :.r y i „q' CORD FENCE APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH, AND DISCHARGED IN A MANNER THAT DOWNSLIDE OF AREAS WITH MINIMAL GRADES TO FILTER RUNOFF FROM SHEET FLOW 5. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFF -SITE PROPERTY. AS INDICATED ON THE ATTACHED SITE PLAN. PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE -HALF PLASTIC FENCE 3. INLET PROTECTION (3.04) - STORM DRAIN INLET PROTECTION WILL BE INSTALLED OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO CORRECT METHODS OF TREE FENCING D. MATERIAL USED FOR BACK FILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO AT EVERY INLET, CULVERT ENTRANCE, OR GRATE ADJACENT TO THE LAND INSURE TECH CENTER OF TECH DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY MINIMIZE EROSION AND PROMOTE STABILIZATION. DISTURBING ACTIVITIES. 4. TEMPORARY DIVERSION DIKES (3,09) - A SYSTEM OF DIVERSION DIKES TO DIRECT HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. E. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS. FLOW INTO THE SEDIMENT BASIN WILL BE INSTALLED AS SHOWN ON THE PLAN. 5. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD F. APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH. 5. CHECK DAM (3,20) - SEVERAL ROCK CHECK DAMS WILL BE INSTALLED UPSLOPE STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS I I I THIS APPLIES TO ALL UTILITY INSTALIAMON OPERATTIONS INCLUDING WATER, SEWER, POWER, CABLE OR GAS. OF THE SEDIMENT BASINS TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS WHICH WILL HELP INCREASE THE EFFECTIVENESS OF THE SEDIMENT BASINS. WHEN NEEDED. 17. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS THE SEDIMENT REACHES THE CLEANOUT LEVEL, IT SHALL BE REMOVED AND CALCULATIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PROPERLY DISPOSED OF. 6 . CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT PLEASE REFER TO THE DETAILS, STORM SEWER AND HYDRAULIC CALCULATIONS FOR THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REACHES ONE -HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR PERFORMANCE OF THE STORM SEWER, DITCHES, AND SEDIMENT BASIN. ALSO REFER TO THE AND TRANSPORTED TO A SEDIMENT REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING CONTROL DISPOSAL AREA, STREET WASHING SHALL PI ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN INSPECTIONS SHALL BE MADE TO INSURE TECH CENTER OF TECH DAM IS LOWER THAN THE WATER QUALITY CALCULATIONS FOR COMPLIANCE WITH THE CBPA REGULATIONS AND THE CORRESPONDING MS -19 REQUIREMENTS SHOWN WITHIN THE APPROVED BLOCK 1A PLANS,' DEVELOPMENT LOTS AS WELL AS TO EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DAM SHOULD BE CORRECTED IMMEDIATELY. WPO- 2008 - 20014.. LARGER LAND- DISTURBING ACTIVITIES. CONTRACTOR SHALL MAKE PROVISIONS TO KEEP ADJACENT ROADS CLEAN FROM SOIL BUILD -UP. 7. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. INFORMATION FROM TABLE 3.32 -C OF THE VA ESC HANDBOOK CORRECT TRUNK ARMORING 18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS 8. THE DOWNSTREAM STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED IS PROVIDED BELOW FOR SEEDING SELECTION TRIANGULAR BOARD FENCE AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS REGULARLY BY THE OWNER TO ENSURE THAT IT IS STRUCTURALLY SOUND AND TOTAL CBS. PER ACRE OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM AUTHORITY. TRAPPED SEDIMENT AND THE HAS NOT BEEN DAMAGED BY EROSION. THE EMERGENCY SPILLWAY SHALL BE 200 -250 LBS source: Va. DsCW Plate 3.38 -2 DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. EROSION RESISTANT. GRASS SHALL BE KEPT MOWN BELOW A HEIGHT of 13" AND 7 CONTRACTOR SHALL STABILIZE SITE, AND OBTAIN INSPECTOR APPROVAL PRIOR TO REMOVING ANY EC MEASURES. THE OUTLET SHOULD BE CHECKED FOR CLOGGING. 0 -107. KENTUCKY 31 OR TURF -TYPE TALL FESCUE 0 -10% 19. PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM IMPROVED PERENNIAL RYEGRASS 0 -107: SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK VEGETATIVE PRACTICES KENTUCKY BLUEGRASS FLOW RATE OF STORM WATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24 -HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA: 1. SURFACE ROUGHENING (3,29) - ALL AREAS WITH A GRADE STEEPER THAN 3:1 GENERAL SLOPE (3:1 OR LESS) 128 LBS ES INTO AN EXISTING ALL CONCENTRATED RUN -OFF IS DIRECTED TO DRAINAGE DITCHES OR INLETS AND OUTFACES SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE 3,29 -4) TO AID IN GRASS ENTUCKY 31 FESCUE 2 LBS SEDIMENT BASIN. UPPER BALLARD POND PROVIDES THE WATER QUALITY TREATMENT FOR THIS DEVELOPMENT. ESTABLISHMENT, INCREASE INFILTRATION, AND TO SLOW RUNOFF VELOCITIES_ RED TOP GRASS 20 LBS A. CONCENTRATED STORM WATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED SAEASONAL NURSE CROP *, DIRECTLY INTO AN ADEQUATE NATURAL OR MAN -MADE RECEIVING CHANNEL, PIPE OR STORM 2. TOPSOILING & STOCKPILING (3.30) - TOPSOIL WILL BE STRIPPED FROM AREAS TO ** USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: DRIP LINE SEWER SYSTEM, FOR THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILES ARE TO BE STABILIZED MARCH, APRIL THROUGH MAY 15TH ANNUAL RYE SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM WITH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED ALONG THE MAY 16TH THROUGH AUGUST 15TH FOXTAIL MILLET SHALL BE PERFORMED. LOWER PERIMETER TO PROTECT DOWNSTREAM AREAS. AUGUST 16TH THROUGH SEPTEMBER, OCTOBER ANNUAL RYE PROTECTIVE DEVICE ALL RUN -OFF IS CONVEYED VIA STORM PIPES AND WILL ULTIMATELY GET CONVEYED TO EXIST. UPPER BALLARD POND. NOVEMBER THROUGH FEBRUARY WINTER RYE B. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE FOLLOWING MANNER: 3. TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL GRADE FOR A (1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE AREA TO THE POINT PERIOD OF MORE THAN 30 DAYS SHALL BE STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE FERTILIZER (10 -20 -10 OR EQ) SHALL BE APPLIED AT THE RATE OF 1000 CBS/ ACRE. MAXIMUM LIMITS OF CLEARING AND GRADING OF ANALYSIS WITHIN THE CHANNEL IS ONE HUNDRED TIMES GREATER THAN THE OF THE PROJECT IN QUESTION; OR ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO AGRICULTURAL LIME SHALL BE APPLIED TO SEEDBEDS AT TTHE RATE OF 90 CBS/ 1000 SQ. FT. \ CONTRIBUTING DRAINAGE AREA THE SOIL ON SLOPES IF STRAW IS TO BE USED. SUGGESTED TEMPORARY SEEDING MIXTURE PROPOSED GRADING (2) (a) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A TWO -YEAR STORM TO VERIFY THAT STORM WATER WILL NOT OVERTOP THE CHANNEL BANKS NOR CAUSE EROSION OF CHANNEL BED OR BANKS; AND 4. PERMANENT SEEDING (3.32) - AREAS THAT ARE TO BE LANDSCAPED WITH GRASS, SHALL UTILIZE SPECIFIED SEEDING MIXTURES, OR IMPLEMENT THE INSTALLATION OF SODDED GRASS FOR PERMANENT STABILIZATION. FERTILIZER: 10 -20 -10 1,000 LBS /ACRE SEPTEMBER- FEBRUARY 15: 507 ANNUAL RYE & 50% WINTER RYE 100 LBS /ACRE FEBRUARY 16 -APRIL 30: ANNUAL RYE 100 LBS /ACRE THE CHANGES IN RUN -OFF ASSOCIATED WffN THE DEVELOPMENT ARE QUANTIFIED IN THE HYDROLOGIC MAY - AUGUST: GERMAN MILLET 50 LBS /ACRE MIN. 5' , ANALYSIS AND SUMMARIZED IN THE NARRATIVE. CHANGES ARE MINOR TO THE OVERALL HYDROLOGY, SINCE THIS SITE IS WITHIN THE EARLIEST STAGES OF NEW DEVELOPMENT DRAINING TO THIS POND. 5. MULCH (3.35) - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL BE OTHER OPTIONS EXIST, SEE VA EROSION AND SEDIMENT CONTROL HANDBOOK. s� Y WHERE DRIPLINE THAN APPLIED TO DISTURBED SURFACES TO PREVENT EROSION AND REDUCE OVERLAND IS LESS 5 FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING SUGGESTED PERMANENT SEEDING MIXTURE OPERATIONS, OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH CANNOT BE SEEDED DUE TO THE SEASON BUT LIME: 2TONS /ACRE CONSTRUCTION OPERATIONS RELATIVE WHICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. FERTILIZER: 10 -20 -10 1,000 LBS /ACRE CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS /ACRE, ANNUAL RYE 20 LBS /ACRE TO THE LOCATION OF PROTECTED TREE S MAY 16- AUGUST 15: KENTUCKY 31 FESCUE 200 LBS /ACRE, FOXTAIL MILLET 20 LBS ACRE AUGUST 16- OCTOBER: KENTUCKY 31 FESCUE 200 LBS /ACRE, ANNUAL RYE 20 LBS ACRE Source: Public Facilities Manual, Vol. III, Fairfax Co., Va., 1976 Plate 3.38 -1 NOVEMBER- FEBRUARY: KENTUCKY 31 FESCUE 200 LBS /ACRE, WINTER RYE 20 LBS /ACRE OLD TRAIL- 8053'\ BLOCKS1 &3'\BLOCKI&3C'\BLOCKSC- BASE.DWG , DATE May 169. 2014 Scale As Shown V lr 1 a I-a. rr�� Vy 0 U 3::5 ? v1 LU Z� N O� Z06 06JZ > j 06 0Q o �! a m g ZD I-'- W D pUQ Qr !� JO V Q cc LIJ WO - 1-- (/) o Q� OU �� >o _jZ � J cc �+ Z Q UQ w W Oo 0 Z� U04 rz 0 LL - LL W 0~ Q rn O Z O d DATE May 169. 2014 Scale As Shown FILE NUMBER 8053 SHEET 4of5 V Z W� � W CO I-a. rr�� Vy U 3::5 ? J0 QCO a _J >m Z06 06JZ > j 06 (n o Q a� 0° =�w Q z Q I-'- W D pUQ Wm !� JO 0 J WO - 1-- (/) CO 00 cc W FILE NUMBER 8053 SHEET 4of5 OLD TRAIL SEDIMENT BA VA- Albemarle County 100 -Year Duration =49 min, Inten =3.47 in /hr Prepared by Hewlett- Packard Company Printed 5/16/2014 HydroCADO 10 00 s/n 08126 © 2013 HydroCAD Software Solutions LLC Stage- Area - Storage for Pond 5P: Modified Sediment Basin (Block 3A) Elevation (feet) Surface (sq -ft) Storage (cubic -feet) Elevation (feet) 66365 Surface (sq -ft) 6,600 Storage (cubic -feet) 15,380 661.00 5,036 0 66105 5,064 253 66370 6,631 15,711 661 10 5,093 506 66375 6,662 16,044 661.15 5,121 762 66380 6,693 16,377 661 20 5,150 1,019 66385 6,724 16,713 661.25 5,178 1,277 66390 6,755 17,050 66130 5,206 1,536 663.95 6,786 17,388 661 35 5,235 1,797 66400 6,817 17,729 661.40 5,263 2,060 664.05 6,849 18,070 661.45 5,292 2,324 66410 6,881 18,413 661 50 5,320 2,589 66415 6,914 18,758 66155 5,348 2,856 66420 6,946 19,105 661 60 5,377 3,124 66425 6,978 19,453 661 65 5,405 3,393 66430 7,010 19,803 661.70 5,434 3,664 664.35 7,042 20,154 661 75 5,462 3,937 66440 7,075 20,507 661 80 5,490 4,211 66445 7,107 20,861 66185 5,519 4,486 66450 7,139 21,218 661 90 5,547 4,762 66455 7,171 21,575 661 95 5,576 5,041 66460 7,203 21,935 66200 5,604 5,320 66465 7,236 22,296 66205 5,634 5,601 66470 7,268 22,658 662 10 5,663 5,883 66475 7,300 23,022 662 15 5,693 6,167 66480 7,332 23,388 66220 5,723 6,453 66485 7,364 23,756 66225 5,753 6,740 664.90 7,397 24,125 66230 5,782 7,028 66495 7,429 24,495 662.35 5,812 7,318 66500 7,461 24,868 66240 5,842 7,609 662.45 5,871 7,902 66250 5,901 8,196 66255 5,931 8,492 66260 5,960 8,789 66265 5,990 9,088 66270 6,020 9,388 66275 6,050 9,690 66280 6,079 9,993 66285 6,109 10,298 66290 6,139 10,604 66295 6,168 1Q912 663.00 61198 11,221 66305 6,229 11,532 66310 6,260 11,844 66315 6,291 12,158 66320 6,322 12,473 66325 6,353 12,790 66330 6,384 13,108 66335 6,415 13,428 66340 6,446 13,750 66345 6,477 14,073 66350 6,508 14,397 66355 6,538 14,724 66360 6,569 15,051 1992 3.27 TURBIDITY CURTAIN TYPE I 5/8 IN. POLYPROPYLENE ROPE 1/4 IN. TIE ROPE FLOATATION FOLDS FOR COMPACT STORAGE ACCORDING TO NEED% ECONOMY FABRICS AVAILABLE 18 OZ. 300 LB /IN. STANDARD NYLON REINFORCED VINYL ALL SEAMS HEAT SEALED 1/4 IN. CHAIN (BLOW -UP OF SHACKLE CONNECTION) O TYPE II 18 (OR 22) OZ. VINYL COVERED NYLON GALVANIZED #24 SAFETY HOOK SABER B TOP LOAD LINE PVC SLOT - CONNECTOR 5/16 VINYL COATED CALE STRESS PLATE (TO REMOVE \ LOATATION-7 PRESSURE FROM FLOATS) \ 100 FT. STANDARD LENGTH FOLDS EVERY 6 FEET DEPTH ACCORDING TO NEED STRESS BAND STRESS PLATE 5/16 IN. CHAIN BALLAST do LOAD LINE Source: American Boom and Barrier Corp. product literature Plate 3.27 -1 1992 TURBIDITY CURTAIN TYPICAL LAYOUTS: STREAMS, PONDS & LAKES (PROTECTED & NON- TIDAL) STREAM FLOW ANCHOR PT. __+ STAKE OR ANCHOR, SHORELINE EVERY 100' (TYPICAL) ® FILL AREA LIMITS 1,� F CONSTR. . -- -- -' SHORELINE ANCHOR PT. TURBIDITY * THIS DISTANCE IS VARIABLE CURTAIN TIDAL WATERS AND /OR HEAVY WIND & WAVE ACTION � --+� -• FLOOD - EBB PROPOSED TOE �C _ _ ,2• OF SLOPE o• EXISTING y j CAUSEWAY Y ANCHOR k \ / -•�' ANCHOR BUOY SHORELINE BARRIER MOVEMENT SHORELINE ANCHOR PT. -� DUE TO TIDAL CHANGE ANCHOR PT. 3 THIS DISTANCE IS VARIABLE ® FILL AREA Source: Adapted from Florida Department of Transportation Road and Design Specifications 3-T I GENERAL 1 METHOD "A" PIPE BEDDING SHALL BE USED FOR ALL TYPES OF PIPE CULVERTS WITHIN THE APPLICABLE HEIGHT OF COVER RANGE NOTED IN THE STANDARD PC -1 TABLES UNLSS5 OTHERWISE NOTED ON THE PLANS 2 H - HEIGHT OF COVER MEASURED FROM TOP OF CULVERT TO FINISHED GRADE, 3 b •' EXCAVATION DEPTH AS SHOWN ON PLANS OR TO FIRM BEARING SOIL CIRCULAR PIPE 1. D - OUTSIDE DIAMETER OF PIPE 2 d - INSIDE DIAMETER OF PIPE 3. X - WIDTH OF CLASS I BACKFILL MATERIAL BE(OND THE EXTREHIT( OF THE PIPE X - 12" WHERE d IS LESS THAN 36 ". X - 18" WHERE d IS 36" AND GREATER + WHERE DIRECTED BY THE ENGINEER BEDDING MATERIAL MAY B E ELI MINATEQ FOR NORMAL EARTH FOUNDATIONS UNDER ROUTINE ENTRANCE PIPE (EXCEPT PLASTIC PIPE) 30" MID LESS IN DIAMETER WITH HEIGHT OF COVER 15'CR LESS 5 REGULAR BACKFILL MATERIAL MA( BE USED IN LIEU OF CLASS I BACKFILL MATERIAL FOR ALL FOUNDATION TYPES FOR ROUTINE ENTRANCE PIPE (EXCEPT PLASTIC PIPE) 30" AfID LESS IN DIAMETER WITH HEIGHT OF COVER 15' OR LESS. 6 BEDDING MATERIAL AND CLASS I BACKFILL, MATERIAL MAY BE ELIMINATED FOR SHOULDER SLOT INLET (DI -13) OUTLET PIPES INSTALLATIONS ELLIPTICAL PIPE 1, 51 - OUTSIDE SPAN DIMENSION OF PIPE 2 S2 - INSIDE SPA11 DIMENSION OF PIPE 3. R • OUTSIDE RISE DIMENSION OF PIPE 4 X WIDTH. OF CLASS 1BAGIFILL MATERIAL BEIOND THE EXTREMIT( OF THE PIPE, X 12 WHERE S2 IS LESS THAN 36" X • 78" WHERE S2 IS 36" AND GREATER 5 WHERE DIRECTED BY THE ENGII IEER BEDDING MATERIAL MAY BE ELIMINATED FOR NORMAL, EARTH FOUNDATIONS UNDER ROUTINE ENTRANCE PIPE WHERE 5215 38" OR LESS AfID HEIGHT OF COVER 15' OR LESS. 6 REGULAR MACKFILL MATERIAL MAY BE USED IN LIEU OF CLASS I BACKFILL MATERIAL FOR ALL FOUNDATION TYPES FOR ROUTINE ENTRANCE PIPE WHERE 5215 38" OR LESS AND HEIGHT OF COVER 15' OR LESS PIPE ARCH 1. S - SPAN DIMENSION OF PIPE 2 R = RISE DIMEN51011 OF PIPE 3 B = SEE PC-t TABLE FOR APPLICABLE PIPE HATERIAL 4, x - WIDTN OF CLASS IBACKFILL MATERIAL BEfOND THE EXTREMITf OF THE PIPE. x - 12" WHERE 52 IS LESS THAN 36" x - 18" WHERE S2 IS 36" AND GREATER 5 WHERE DIRECTED BY THE ENGINEER, BEDDING MATERIAL MAY BE ELIMINATED FOR NORMAL EARTH FQUNDATION5 UNDER ROUTINE ENTRANCE PIPE WHERE S2 IS 35" OR LESS AND HEIGHT OF COVER 15' CR LESS 6• REGULAR BACKFILL MATERIAL MAY BE USED IN LIEU OF CLASS I BACKFILL MATERIAL FOR ALL FOUNDATICtt TYPES FOR ROUTINE ENTRANCE PIPE WHERE S IS 35" OR LESS ANO HEIGHT OF COVER 15' OR LESS 3.27 Plate 3.27 -3 INSTALLATION OF PIPE CULVERTS AND STORM SEWERS NEW. 1 /01 CENERAL NOTES 107 00 1 VIRGINIA DEPARTMENT OF TRANSPORTATION SPECIRCATIQ REFEPEIICE 302 303 PB -I NO PROJECTION OF PIPE ABOVE GROUND LINE TOP OF FILL TOP OF FILL TOP OF FILL '- GROUND LINE H AND COMPACT GROUNO LINE H -„- r GROUND LWE H d /� EARTH 0/2 L 4" IM. V10 0 X 1'�'P�i x BEDDING NORMAL EARTH FOUNDATION ROCK OR 2° // d '// NYIIELOWO 0/2 �1 WN. 1/10 D %oF H x W1°TERIAGI. UM 24., ROCK FOUNDATION 0, 11 �/ d EARTH ��AL b MIN. 1/10 D T x D x FOUNDATION SOFT, YIELDING, OR OTHERWISE UNSUITABLE MATERIAL PIPE PROJECTION ABOVE GROUND LINE 1� NW LS x D _I_ MIN LS x D _I MW. 1.3 x D MW. 1.5 x D x,1.3 x D MW. 1,5 x D,4 TOP OF FILL TOP OF FILL 1 ' TOP OF F� - •--� -H o � �0) +- -�-- -H = rNN:r�rr✓ri r / /:rrNrN:r = rr /r /r // r /ANN /_GRIXWD - d -LWE P/2-_ /r jf DEtIND H � rrrrrr r /r /r r/N Nrrrr = p•12" /� d ii %!N GROUND TL �ENtTN I 4 MIN, vfo X x !E°DL� NORMAL EARTH FOUNDATION _ ROCK OR MW, V10 D UNYIELDING s01L � /�' PER X D X M(IT°F�N. Nro°c "H ROCK FOUNDATION I.W. 24" / MW 1/10 D BEODWO NATERIA. EARTH FOUNDATION SOFT, YIELDING, OR OTHERWISE UNSUITABLE MATERIAL ®BEDDING MATERIAL IN ACCOROMICE WITH NOTES: SECTION 302 OF THE ROAD AND BRIDGE SPECIFlCATIONS, FOR PLASTIC PPE, THE LIMITS OF THE CLASS I BACKFLL MATER AL SHALL BE CLASS I BACKFILL MATERIAL IN ACCORDANCE EXTENOEO TO 12" AROVE THE TOP OF TW PIPE. WITH SECTION 302 OF THE ROAD AM BRIDGE SPECffICATIONS. FOR GENERAL NOTES ON PIPE BEIDWG SEE INSTALLATION OF PIPE CULVERTS ®REGULAR BACKFILL MATERIAL W ACCORDARCE ANO STOFMA SEWERS GENERA- NOTES ON SHEET 107 00. WITH SECTION 302 OF THE ROAD MO BRIDGE SPECFICAT EMBANKMENT CRUSHED EGATE GLASS IZE 25 AND 26 NA 8E USED IN PLACE OFSCLAASSSCI °BACKF L ® FJ18MU(MENi SHEET IOF 4 g� INSTALLATION OF PIPE CULVERTS AND STORM SEWERS CIRCULAR PIPE BEDDING AND BACKFILL - METHOD "A" REV 1/07 R ,07.01 303 TABLE 3.27 -A PHYSICAL PROPERTIES OF TURBIDITY CURTAIN FABRIC Physical Property Requirement Thickness, mils 45 Weight /oz. /sq. yd.: Type I 18 Type II 18 or 22 Type III 22 Grab Tensile Strength, lbs. 300 UV Inhibitor Must be included F CONSTRUCTION OF A SILT FENCE WIRE SUPPOR 1. SET THE STAKES. 2. EXCAVATE A 4'X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6'MAX 1��eE =JiIIC -'s °U ,MILT FLOW 011_` _nI!!I'' 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. S� VA ,ir 'FL�tll,� A ��E11 p,f-- �_:IIII>�I(I;- Illli -1'" N SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) FLOW ys�^ 1 I-- SMAX .' rl R•� i«YSWS, Fw4,�.'..�i .�+,f.''CNSt ...q w. Y7, ^:•- S I POINTS A SHOULD BE HIGHER THAN POINT B. DIMIOGEWAY INSTALLATION (FRONT ELEVATION) PLATE. 3.05 -2 SOURCE. Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control,VA. DSWC Sherwood and Wyont rel PIPE OUTLET CONDITIONS OUTLET PROTECTION A AL 'IPE OUTLET TO FIAT LREA WITH NO DEFINED ;HANNEL La PIPE OUTLET 0� % • -'rt�r �' i, zfli Yid �.3 I ' 'f';, `.1% f +r J" /iii tt�l ,. SECTION A -A FMTM cLM KEY IN 6 " -9'. RECOMMMKD MUUMUM FOR THE ENTIRE RTPRAP PERDW1'ER 1 -) I l rr - - t • 1 PIRE 0 WELL DEYD ED CHANNEL DAM { Tj r I r i d +L,, (MIN ) PLAN VIEW SECTION A -A - FMTER CLOTH KEY IN 6' -g*; RECOMMMED FOR ENTIRE PERDIi;M NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RD'RAP, GABION BASKET, OR CONCRETE. 2. La IS THE LENGTH OF THE 1WRAP APRON AS CALCULATED USING PLATES 3.18 -3 AND 3.18 -4. 3. d - 1.6' IIMUM CLASS I STONE DEPTH Source: Va. DSWC Plate 3.18 -; o�4��T,TH 0•F Pj+P ' Christopher C. Mulligan Lic. No. 031672 W4 YO 031672 1�� ONAL MINIMUM STORAGE VOLUME AND SEDIMENT STORAGE 67 C.Y./ AC:` DRY "STORAGE 67 C.Y./ AC. WET STORAGE SEDIMENT CLEANOUT POINT (" 0 34 CTYO./ ACRE) REDUCED Source: VA. DSWC. Plate 3.14 -1 SEDIMENT BASIN SCHEMATIC ELE VA. TIONS DESIGN HIGH WATER (25 -YR. STORM ELEV.) 67 C.Y./ AC. - " DRY " STORAGE q 67 C.Y./ AC. " WET STORAGE NZE-VAIIICI 1 CREST OF EMERGENCY i SPILLWAY MIN. 1.0' RISER CREST DEWATERING DEVICE TYPICAL 8' ORIFACE W/ 6" TUBE --- (PLUG WITH BASIN CLOSURE) SEDIMENT CLEANOUT POINT I I WET " STORAGE (« TO 34 C.Y. / ACRE) REDUCED DESIGN ELEVATIONS WITH EMERGENCY SPILLWAY Modified Berm MIN. 2.0 6' MINIMUM WIDTH TOD= 667.55 DESIGN HIGH WATER (25 -YR. STORM ELEV.) Elev.= 664.55 MIN. 3.0' Vol. = 18,897 S.f. MIN. 0.5'� MIN. 1.0' =700 c.y 67 C.Y./ AC. tt T DRY " STORAGE Ex. 30" Riser SER CREST s7 C.Y./ Ac. :..: • :.::::. Nev. = 664.17 it WET STORAGE EXISTING ''1rry DEWATERING r,p;r/r1/r, r111r�r(�•�r,r ////' //,�i�.,rr,`;:,' DEVICE fhV'NhShh }• ", 1 {•11V1r' ••5'h• "%11V11'r 1r. {'}111• }h1 ' .:i'r: r :r ::• • nr 'ti{i:•'r:....:;ti•!K:'iiiiiiilti{ Bottom =661.0 Min. elevation of SEDIMENT CLEANOUT POINT Dewatering Device Elev. = 661.85 Elev. = 662.71 DESIGN ELEVATIONS WITHOUT EMERGENCY SPILLWAY (RISER PASSES 25 -YR. EVENT) NOTE: Existing Sediment Basin to be Modified in order to provide the required Pond Storage Volumes. Dewatering & Cleanout Elevations also Modified to meet the Required Detail Specifications. OLD TRAIL- 8053\BLOCKS 1 &3\BLOCK 1 &3CABLOCKSC- BASE.DWG�� 411 4. BACKFILL AND COMPACT a THE EXCAVATED SOIL. � w � U F--I U v�Q 4% LL UdS `0 i