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HomeMy WebLinkAboutWPO201400018 Plan - Approved 2014-03-10AMENDMENT TO = �n 0 d F %::° EROSION &SEDIMENT CONTROL PLAN FOR = m LM aW iN HITTINGTON SUBDIVISION - PHASE A ° TM 90 PARCEL 3 et al. SAMUEL MILLER DISTRICT, L EM RLE COUNTY, VIRGINIA CURRENT DEVELOPMENT PLANNER CURRENT DEVELOPMENT ENGINEER ALBEMARLE COUNTY SERVICE AUTHORITY FIRE OFFICIAL ARCHITECTURAL REVIEW BOARD BUILDING OFFICIAL VIRGINIA DEPARTMENT OF TRANSPORATION IN )EP. EA1 Cover Sheet EA2 Erosion and Sediment Control Plan EA3 Details.. Profiles, &Calculations Piedmont Neighborhoods, 1 111 1 Sunset Hills Road, Suit Reston.. VA 20190 LP e 200 NMI This copy of the approved plan is reserved for the official files „P Alhernado County. Please no not remove this pion from the file. APPROVED by the Albemarle County Community Development De*njent Date L4 - 7- z c, t 4 File _gyp e- o t v o o I A APPROVED DISTURBED AREA = 23.7 Ac. ADDITIONAL DISTURBED AREA WITH THIS AMENDMENT = 2.17 Ac. Ak' P o� U MICH z 0 Z h . i es♦ 9 ?F. MYERS No. 33028 s � 01VAL A uil cc 1 m a w Y U W U I . a w 0 w Z w 0 P O bi ! �5 W Z z � '-4 CD A O O Pi � I U U m a w Y U W U I . a w 0 w Z w 0 P O bi E---1 W W O U DOM. PROJECT NO :13,0 INDEX TITLE: EAt SHEET NO: 1 OF 3 DATE: 03/15/11 W � LLI CD Q Z O � � I W J � a 0 � � � E---1 W W O U DOM. PROJECT NO :13,0 INDEX TITLE: EAt SHEET NO: 1 OF 3 DATE: 03/15/11 W � CD O � I 1:4 a 0 � � � W O H E-1 E–' W� W � a E-1 6i ID �j. W W E7 2 r E---1 W W O U DOM. PROJECT NO :13,0 INDEX TITLE: EAt SHEET NO: 1 OF 3 DATE: 03/15/11 - ' ---- -- + ` ■ 111 \` `�`` \ `` �'` `\�` y ``` �` . \ ` . \ \ . \ � : , ' '\ - -- , \� `\ \ ` ` _ `_ ■ I -_1 ♦ ♦` ``` \i ',' ,i j1 '{ ,I i ,+ � +,, ,, \i + +,` \ \ \'t`,,'``t`4 \I t,' ,t I,, \\ \\ \\ \,\ \\\`,• ■ 1 --- --- - -- -- ■ CULVERT B - 18" = _DA 4.05 Ac , 1 \ \ ■ -'' � - - - - -" '��'�♦ I � 1 ` +, \ ,' ,'�'�;;III;I I i, � ,``,�`� \\ \ '`�----- - - - - "' - �� - -- Tc =17.1 min - ■ N0.50 (Future --- - - - - -- i I 0 = 4.4 in/hr ----- - - - --- 4------ - --Q10 = 8.91 cfs - -- ■___ -/ /' ?m---- -------- -- -------------- IN ■ '' / -------------- - - - - -- - - _ ,/' / - - - - -- `` `^` � ■ /! i'' ,' // '' _'- _`_ ---. -- _- -_ _ - -,_ / x` >.' ` ^ter,/ i/ i' /' ` \ \\ , `■- i i '` % Q9vaT'B - _• i / , \`` \ ----- - -- -- i atsm.a Al 4l jir - -� xi -- -- ---------- r- ----------- - / ♦ Acres. I CULVERT 15" `� ----------- \ s \�� \\ \ DA = .0.15- )/ " 0.9�AtreS / Tc =5.0 mm • \ C = 0.42 I I// - t i �\ , �+ '`, ``I + ++ \•\ ----------- Q 10 = 0.45 cfs' - ' "- V _- - --Ian 7b-_ - - - *ews . \ `, ` \', - - - - -- - il __ 0.95 Acres ' - "'' ,.. \ + - ~ �. Lot 48 I.I I Atn / PIPE OUTLET TO WELL- DEFINED CHANNEL PLAN VIEW = 12' 0% d =12" SECTION A -A FILTER CLOTH KEY IN 6 " -9 "; RECOMMENDED FOR d 50 = 6 ENTIRE PERIMETER (Mellen stone She) OUTLET STRUCTURE: ST -3 'E JTLET ) FLAT ZEA TH NO DEFINED CHANNEL I - - I J _ 611 I- dT =12" I I ILIt_I\ VL_V III r\LI IIY V -a , SECTION A -A RECOMMENDED FOR ENTIRE PERIMETER OUTLET STRUCTURES: ST -6, CULVERT C, SB -1, SB -2 & SB -3 Outlet Structure Diameter Pipe (in) Discharge (cfs) Apron Length (ft) Upstream Apron Width (ft) Downstream Apron Width (ft) Riprap Stone Size ST -3 18" 8.29 10.00 4.5 11.5 Class Al ST -6 15" 3.52 10.00 3.75 11.25 _ Class Al SCC -6 - 1.36 10.00 6 8 Class Al ST -1 18" 10.07 10.00 4.5 12 Class Al -- f -� - rr to II -11 } 0.00 I_, r� i Lo cy n �h _Proposed fife II CULVERT B - 18" 8.91 10.00 4.5 12 Class Al as SWM -2 24 "- 10.29 1 30.00 _ _ 1 6 36 Class Al 2 OUTLET PROTECTION TABLE EA3 Not To Scale 1 3 STORM SEWER PROFILE ST 4 -> 8 EA3 1 =30' Horz, 1 =10 Vert LD -229 Storm Drain Design Computations Route: Proj: Whittington Subdivision County: Albemarle District: Samuel Miller To Point 0 - �,w E Runoff }� v, L U N Tot C N cfs O) O m N - � c Up ' j - O Inv L c -aa_ _ -_� _ O I Coef �C 525 o Int - rn O._o__.- - - - -- _ ;_. c7 - - -r7- _ __- ...- N -- :: 00 .^_. 3 525 520 ST -6 -- f -� - rr to II -11 } 0.00 I_, r� i Lo cy n �h _Proposed fife II II lLp 520 515 (ft) 0 V -to- - - xlsfmg I'r file -v -o - V -� o a y to -tn N -c - -- -- c e•otrurtse�� _- 515 - O o aa - �p 7 510 9 10 11 12 13 14 15 16 17 U 510 505 _ 5: 505 ST -3 ST -2 1 6.501 0.301 1.951 1.951 i - - - _109'__ 15'_'_HDIP_E_Ca? 505.001 500.501 184.01 -- - --- - - - - -1 9.3 0.33 ,_.._, ST -2A I ST -2 1 0.991 0.351 0.351 2.301 14.011 4.941 11.341 503.501 500.751 50.01 5.501 151 - -- 12.341 500 ST-2 _ 1 0.201 _-_ - --_ - -- - �__ 4.211 10.071 500.001 491.101 _ 4.591 181 1� 12.741 _ 500 A . eS _- -I- _ _� _..�_ T_ -- _ - I v:= 498:a�1 - --t- ° U - 495 - - 1 - - - -� - -- - 495 0 +00 0 +50 1 +00 1 +50 2 +00 2 +50 3 +00 3 +50 3 STORM SEWER PROFILE ST 4 -> 8 EA3 1 =30' Horz, 1 =10 Vert LD -229 Storm Drain Design Computations Route: Proj: Whittington Subdivision County: Albemarle District: Samuel Miller �'iil i h � i aV 1- e e 5� U MICHAEL F. ERS y i,�c,. No. 33028 ON a r. E11�1 Description: Pipe Calculations ::E1 From To Point 0 - �,w E Runoff }� v, L U N Tot C N cfs O) O m N - � c Up ' j - O Inv L c Velocity Flow time °='mm E O A Coef �C AC o Int Flow Inv Inv Len S Dim Cap 4.84 Inc ST -6 ST-5 0W 0.00 0.00 0.93 (min) (in /hr) �'iil i h � i aV 1- e e 5� U MICHAEL F. ERS y i,�c,. No. 33028 ON a r. E11�1 Description: Pipe Calculations ::E1 From To Point Catch Runoff Inc Accum Tot Tot Tot Up Dn Pipe Inv Pipe Pipe Velocity Flow time Point ST -6 A Coef AC AC Tc Int Flow Inv Inv Len S Dim Cap 4.84 Inc ST -6 ST-5 (ac) 0.00 0.00 0.93 (min) (in /hr) (cfs) El El (ft) % (in) (cfs) (ft /s) (min) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 U c ST -3 ST -2 1 6.501 0.301 1.951 1.951 19.301 4.251 8.291 505.001 500.501 184.01 2.451 181 16.44 9.3 0.33 ,_.._, ST -2A I ST -2 1 0.991 0.351 0.351 2.301 14.011 4.941 11.341 503.501 500.751 50.01 5.501 151 15.151 12.341 0.07 ST-2 ST -1 1 0.201 0.471 0.091 2.391 19.631 4.211 10.071 500.001 491.101 194.01 4.591 181 22.511 12.741 0.25 ST -8 ST -7 A O ci O 0.77 16.50 m 3.52 512.00 509.43 48.0 5.35 15 14.94 12.18 0.07 ST -7 ST -6 0.37 in 0.17 0.93 16.57 4.58 4.27 509.23 508.81 W 0.50 15 5.94 4.84 0.29 ST -6 ST-5 Y 0.00 0.00 0.93 16.85 4.54 4.24 508.40 U 109.0 0.50 15 5.94 4.84 0.38 ST -5 w 0.001 0.00 0.00 0.93 17.23 4.49 4.19 505.48 502.80 94.4 2.84 15 10.89 8.34 0.19 U c Z z I O ° N U ,_.._, � O M W m A ° U ST -8 ST -7 2.13 0.36 0.77 0.77 16.50 4.59 3.52 512.00 509.43 48.0 5.35 15 14.94 12.18 0.07 ST -7 ST -6 0.37 0.45 0.17 0.93 16.57 4.58 4.27 509.23 508.81 84.0 0.50 15 5.94 4.84 0.29 ST -6 ST-5 0.00 0.00 0.00 0.93 16.85 4.54 4.24 508.40 507.85 109.0 0.50 15 5.94 4.84 0.38 ST -5 ST-4 0.001 0.00 0.00 0.93 17.23 4.49 4.19 505.48 502.80 94.4 2.84 15 10.89 8.34 0.19 4 LD -229 STORM DRAIN DESIGN COMPUTATIONS EA3 �- -------- - _ ---------- - - - - -- LOt 1.05 Ac�Vs _ _ 1 - -- ------- -- -- -- --- - - - - - -- -- -- - - -- - --- -_- - -_ _ _ = - -- -_- - - -' vi -- - - - - -- - / i 1 CULVERT DRAINAGE AREAS 100 0 100 zoo 300 EA3 SCALE: 1" = 100' �\l 11 ' !I 1 I I � I l i y��•I I 6 IS i I \ r5_' SEDIMENT BASIN DETAIL FOR SB -2 30 0 30 60 90 EA3 SCALE: 1" = 30' .I I \ I \C-) I .� i / / / / / / I U r m 0 w Z °z m U) w CD CD 0 o Q rn - - -- i.- ___- ----- - ------ di t I J / - __ `• •�`��: -_ -- _ +/ - J� -`_� ___ ____--- ii'J;J�lllli ill% Q i I O I - �I` - - � i tit :�\------- --' \ \ \` \\\ "-\i✓ \ `\ '\ \ i / w t ` -------- ----- -- �� s t It ! i tl / / ° Chi CO d' LL 1 i/J / , , 58 -3! % ". 4.29 Ac = 5B -3 i 4.29 Ac j;% -- -- -- -- - - - - -- -- ---- -- -- - - -- J �I 2.05 Ac xe Llo � h +gal os. -1 F_ W F_ -__ r - _ _ Ii�Q/ /lip _ �� ., _4 • DOM. PROJECT NO:13 °003 �- / - -- \`------ - - - - -- _ -- _ - -- _ \ INDEX TITLE: �1 A xe Llo � h +gal os. -1 F_ W F_ 150 0 150 300 450 SCALE: 1" = 150' 6 SEDIMENT BASIN 2 DRAINAGE AREA EA3 SHEET NO: 3 OF 3 DATE: 03/15/11 -__ r - _ _ DOM. PROJECT NO:13 °003 �- / - -- \`------ - - - - -- _ -- _ - -- _ \ INDEX TITLE: 150 0 150 300 450 SCALE: 1" = 150' 6 SEDIMENT BASIN 2 DRAINAGE AREA EA3 SHEET NO: 3 OF 3 DATE: 03/15/11 Culvert Report Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc. = 518.50 Tuesday, Feb 4 2014 Culvert B Pipe Length (ft) = 53.00 Qmin (cfs) Invert Elev Dn (ft) = 501.00 Calculations Qmax (cfs) Pipe Length (ft) = 133.00 Qmin (cfs) = 8.91 Slope ( %) = 6.32 Qmax (cfs) = 8.91 Invert Elev Up (ft) = 509.41 Tailwater Elev (ft) = (dc +D) /2 Rise (in) = 18.0 = 15.0 Qtotal (cfs) Shape = Circular Highlighted Qpipe (cfs) Span (in) = 18.0 Qtotal (cfs) = 8.91 No. Barrels = 1 Qpipe (cfs) = 8.91 n -Value = 0.012 Qovertop (cfs) = 0.00 Culvert Type = Circular Concrete Veloc Dn (ft /s) = 5.39 Culvert Entrance = Square edge w /headwall (C) Veloc Up (ft/s) = 6.11 Coeff. K,M,c,Y,k = 0.0098, 2, 0.0398, 0.67, 0.5 HGL Dn (ft) = 502.33 = 519.84 Top Elevation (ft) HGL Up (ft) = 510.56 Embankment Top Width (ft) Hw Elev (ft) = 511.38 Top Elevation (ft) = 522.00 Hw /D (ft) = 1.31 Top Width (ft) = 24.00 Flow Regime = Inlet Control Crest Width (ft) = 20.00 Culvert Report Hydraflow Express Extension for AutoCAD® Civil 3D® 2013 by Autodesk, Inc. Tuesday, Feb 4 2014 Culvert C Invert Elev Dn (ft) = 518.50 Calculations Pipe Length (ft) = 53.00 Qmin (cfs) = 0.45 Slope ( %) = 1.89 , Qmax (cfs) = 0.45 Invert Elev Up (ft) = 519.50 Tailwater Elev (ft) = (dc +D)l2 Rise (in) = 15.0 Shape = Circular Highlighted Span (in) = 15.0 Qtotal (cfs) = 0.45 No. Barrels = 1 Qpipe (cfs) = 0.45 n -Value = 0.012 Qovertop (cfs) = 0.00 Culvert Type = Circular Concrete Veloc Dn (ft/s) = 0.58 Culvert Entrance = Square edge w /headwall (C) Veloc Up (ft/s) = 2.43 Coeff. K,M,c,Y,k = 0.0098, 2, 0.0398, 0.67, 0.5 HGL Dn (ft) = 519.26 HGL Up (ft) = 519.76 Embankment Hw Elev (ft) = 519.84 Top Elevation (ft) = 521.90 Hw /D (ft) = 0.27 Top Width (ft) = 24.00 Flow Regime = Inlet Control Crest Width (ft) = 20.00 El et (ft) 522.09 521.09 520.00 51'x.00 510:00 Culvert C Hw Depth (ft) 2.50 Im 9.50 -0.50 -1:59 517.00 -2.5+3 0 5 10 15 20 25 50 35 40 45 50 55 60 55 70 75 Circular Culvert HGL - Embank Reach (ft) ~1��� \\� 11 ,{ ` Il It 11 1 1 11 \ `\ \\ /( \` \\ `\ \ \ \\ `\ > �` v to - - - so ,'/ II I ' I it 11 11 \` \I / ``� \`\ \`\ \\ \ \\ \\`\ N N II \\ \\ \\ \ \\\ �\` L a_ \ I \ 1 I \ \ \ \ \ n 0) E W m m N ❑ # _ - , �``\ - -_ II \\ \ \\ \ \\ \`\ \`\ \\\ \`\ \ \` ■O C 1 \ \ 1 \Stream \Buffer \\ ` ' \\ \\ \ \ \ C 0 W STOCKPILE / • `\ _ _ '/ \\ \ AREA \ - - - - -- `\ \ -' / ( J` ------ Additknaa7 -D sTLir- 6ed--- - - - - -- �A. _ ,n� � /l I r' �\ \ \ \\ ` \\ �yi -- AF-ea- =-2fi7" acres - - - - '` -, _ - � ,' , , \ 4 .-.._ � �. o zo ------- --- - - - - -- - __-- - - - - -� - - _ 2' ravel �� // App /OV,6d Limits --- - - - - -- '\ \ `\ r /' /' �� d/ rive / ' / /`of/ Co�stru&ion 4% r -- - - - - -- _ \ ` ♦ ♦ T�-X�.G� /` / /' / , / 133' - 15 "_26P _ _ �J� /'` /( ' /' \ \, // // ` \\ \~ i _ - - - - -- _ \ `\ \`\ \` ♦ ♦ ♦ �' /` / /' ,' /' / / Iny.- Ir:509.4 �� G� ' -___ .kt'v: Out:501.0 - - - - -- - \ \`\\ \�` \` _ ''/ /� /• ♦ /� ' ,/ /' ,/ / ��' 5= 6.32%'' _ /// /// / \\ f, \\ 1 / \\ \�\ O r+ MI L F. MYERS /' / _ - / \ / \ - - - - -- ic. No. 33028 ` \ - - -- SC`s 1 E'Catculations: Q(2)-:�=1.OAa /cfs / Q(10) 2.1'0 cf i / `\ `\ ♦ ­4 - d, i 0)= 0.x;9' `\ `1 - / \ z\\ ♦ -- - - - - -- ` V(' ) =2.19 fps \ \ _ ~ ------- - - - - -- t------- \�-- - - - - -� - - -- - - 1 Nature rail / W - - - -- -- - - - - -- - - ----- - - - - -\ - - --h \ \ \ / I , 1 _p_ts! 1 1 / Unit \ \ \ \\ , , :C\­: �: \ \ \ \\ O - Ala, 1 - -- 1 ♦ - _ -- - 03 C11 rA FFE I -___ -_ __094 Acres GM- 533,0`\ ` \ \\ \ . \\ \ �\ \!s,'\ \.. \ \ \ \\ \ ` -- BFEW&Qw /o �\ `\ FFE 52d5 I \ / , / _ - - -__� - - \ \ \ ` \\ \ \ �8 ` GFE:511.5` �\ \ \s \ \ \ 1 \ G 51& I�ot 49 WE 503.5 w/q \ \ \ \ \ 1 \ Lot 7\7 \ \ \ } / i I / i Ir / - `_ 28 \ \ 11 \` b 92 A' `\ \ \ ♦ \\ ` \, \ r \ \\ m I / , / , r / , \ \ \ \ , \\ \\ cre5 \I \\ \'� \ - - - - - - - - - - \\ °w 0 r� _ w C0lvert C \ \ \ s .-� FT 53' , 15" R6 L� c � m E ,4 o 02 0 Ou •518.5 \ \ ~� \ ` \ �,_ \ �� _.\_sL. \� _ _s A \ \ \\ \ S .89 %\ \ ` s� \ ` `SO \\ \ _,, - �_ \ \ \ _ CO � co co C`� /� _ / r _ \ 1 \ `\ `\ �\ \ o Lot i8 - . \p 10 p /' / S No / %�• 0,/ r"�CA�A /1 / i 1 - \ `\ \` "� �� \ \\ \` - - - - - -- - \` \ \ I 'i,,_ y - _ _ Uj 519.7 II - Z ----AWE \ I _ c o �/ / BFE507.7 w/o \ o \ \\ \ T ate, \ l •0.i 15 ign CQ U U 24. 10% Max slope \ \ \ \`\ \`\ _ `� :�' Lot 40" / \1 I ��\ I Area (Typ.) `\\ \ \ \\\ _ \ o `l SPe ~\�` \\ _ 114 l\ - -- _o � \ M521,5 I I � \ p � `\ \ \ \ _ .,� ed \ u.i \ _ j Zi - \ \ _ _ iimi ----- \ \ _ \ Q \ ` \ \ GFE:524.5 � I.I I Acres I I �- - £ _ � Z t� J � 1 1, 1 (� 11 l I 1 1 1 f I W i I- -- - \ Sj CiING _ AR � _ � I I ` 4.0 1 FFE 535.E \\ FFE-537.5 \ \ o \ r' � -,-, I `\ GFE 535.5 - \ cn I I M \ , GFE 533.7 \ \ \ \ BFE. 528 5 `\ " BFE526.7 \ \\ \ 0 \�\ \\ _ _ o _ ?" 5 \ \ .2x - \ 355 ` \\ \ \ - \ \ - - ~,�� 24. E­4 FFE-536.5 ~ `s352 \ �9 C) 2x� \ x--- ` = • �' Lot 83 ♦ \ -------------- I i �" �\" �\ 10 Acres ` \ \ \ \\ I _I - 531.9 - +_" , FFE 539. _ _ _ j I � 5.1 E iE 52.9 0.93 Acres t I _ I I , \ 8FE \Lo t 84 \ `\ \ Lot 82 \ I 1 1 1 \ \\ 1 .8.2 Acres \ \\ \\ ,`P 0.97 Acres Lot 85 \ \\ \ � � I -524.7 --- -1-. -02 Acres -__ I ` \ \ `\ I \ 1 522-7 _ ` \ \ ` ` 5 S _ \- _---- _ - - - - � I / �\ _ in ti \ - -- - - T - / FFE 514.5 � \ j \ \ 1\ \\ \ `\ \ � ' ,/ � _ , I i -'�'~ --� GFE' 5115 / \ \' BFE5055 I I . Q5 A e5 \ I / - O \\ W \ \P�\ r / - ♦ /' / / �- ,''/' \ \`. - - ___ - DOM. PROJECT N0:13.003 ® 1010 / ' - - - - - � /' / � `, _ _. - % � .� • \ ,�' �' / / /� INDEX TITLE: go =. 10 Jlr qet EA2 ' • 50 0 50 100 150 ' SHEET NO: . 2 OF 3 ; SCALE: 1" = 50' 10-100- i 14 _ go ------ DATE: 03/15/11