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HomeMy WebLinkAboutWPO201300072 Plan - Approved 2013-11-26BRIARWOOD COMMERCIAL LOTS GENERAL NOTES OWNER: 032Go -oo -oo -000Ao & 032Go -oo -oo -000Bo WOODBRIAR ASSOCIATES PO BOX 5548 CHARLOTTESVILLE, VA 22905 APPLICANT: WOODBRIAR ASSOCIATES PO BOX 5548 CHARLOTTESVILLE, VA 22905 ENGINEER: COLLINS ENGINEERING Zoo GARRETT ST. SUITE K, CHARLOTTESVILLE, VA 22902 TELEPHONE: (434)293-3719 FAX: (434)293-2813 SCOTT CONTACT. MR. COLLINS, P.E. EMAIL: scott@collins-engineering.com TAX MAP NO.: 032Go -oo -oo -000Ao (D.B. 38331 PG. 247) 032Go -oo -oo -000Bo (D.B. 3833/ PG. 247) AREA: 32G, PARCEL A -13.11 AC. 32G, PARCEL B - 9.48 AC. ZONING: C1 COMMERCIAL, ENTRANCE CORRIDOR OVERLAY PROPOSED USE: SUBDIVISION OF COMMERCIAL LAND INTO INDIVIDUAL LOTS FOR PROPOSED AND FUTURE DEVELOPMENTS. LIMITS OF DISTURBANCE 9.25 ACRES BUILDING HEIGHTS: MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 65 FEET, PROVIDED ANY STRUCTURE EXCEEDING 35 FEET SHALL BE SET BACK FROM THE RIGHT OF WAY A MINIMUM OF 2. FEET FOR EACH 1 FOOT OF HEIGHT IN EXCESS OF 35 FEET. SETBACKS: ADJACENT TO PUBLIC STREETS: 30' (PARKING 1o') ADJACENT TO RESIDENTIAL /RURAL DISTRICT: 5o' (PARKING 2o') NOTE -THIS PLAN INCLUDES A WAIVER REQUEST FOR THE DISTURBANCE WITHIN THE BUFFER ZONE ADJACENT TO RESIDENTIAL AND RURAL AREAS DISTRICT. NO CONSTRUCTION ACTIVITY INCLUDING GRADING OR CLEARING OF VEGETATION IS ALLOWED CLOSER THAN 20' TO ANY RESIDENTIAL OR RURAL AREA DISTRICT WITHOUT APPROVAL OF A WAIVER. ALL SCREENING AND BUFFER REPAIR /RE- ESTABLISHMENT IN THIS AREA SHALL BE PROVIDED AS REQUIRED IN SECTION 32.7.9. r EXISTING /PROPOSED USE: EXISTING VACANT; PROPOSED COMMERCIAL LOTS FOR DEVELOPMENT. SUBDIVISION STREETS: CURB & GUTTER WATERSHED: NORTH FORK RIVANNA (BELOW WATER INTAKE) WATERSHED TOPO & SURVEY: TOPOGRAPHY AND BOUNDARY PROVIDED BY LICENSED LAND SURVEYOR THE ENGINEERING GROUPE IN 2012. NAD 83 EXISTING VEGETATION: EXISTING TREES, SHRUBS, AND UNDERBRUSH. SOME AREAS HAVE BEEN CLEARED AND GRADED. THERE IS ALSO A SEDIMENT BASIN LOCATED ON THE PARCELS AS WELL THAT WILL BE REMOVED. FLOODPLAIN: FEMA MAP NO: 51003Co145D, PANEL NO: 0145D, DATE: 2/4/05 NOTE:THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS- THERE ARE NO FLOODPLAIN LIMITIS OR WPO LIMITS ON THE PROPERTY. ADJACENT PROPERTY OWNERS: SEE EXISTING CONDITIONS, SHEET 2 TOTAL NUMBER OF LOTS: 5 AREA OF PROPOSED OPEN SPACE: 0.57 AC. AREA WITHIN LOTS: 22.34 AC. . AREA WITHIN PROPOSED /FUTURE RIGHT OF WAY: 4.38 AC. NOTES: 1. PARCELS 1 -5 AND THE RESIDUE OF TMP 32G, PARCEL A & B, EACH CONTAIN A BUILDING SITE THAT COMPLIES WITH SECTION 4.2.1 OF THE ALBEMARLE COUNTY ZONING ORDINANCE. 2. THERE ARE NO KNOWN LOCATIONS OF ANY GRAVES, OBJECTS OR STRUCTURES MARKING A (PLACE OF BURIAL ON THE SITE. APPROVALS DATE DEPARrINEN'F OF COMMUNI'I'Y DEVELOPMENT PLANNER/ZONING (n ENGINEER � / -- ) I ill' \+ i INSPECTIONS /N ARB yj DEPAR "I'IvIENT OF FIRE RESCUE Lic. No. ALBEMARLE COUNTY SERVICE AUTHORITY SUBJECT Rp <O VIRGINIA DEFARMENT OF TRANSPORTATION ���\ SITE HEALTH .DEPARTMENT Uj COLLINS ENGINEERING IS NOT RESPONSIBLE OR LIABLE FOR ANY CONSTRUCTION OR DAMAGES TO THIS PROJECT PRIOR TO ALL FINAL PLANT APPROVALS. I I I J I I 01 . RIO MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA l' i.l�l i 1 t,.t \ \it, +' 't ` ' v il`itti`tllit`rliiitl+' � `ttt \'t'�ttt tit\ �1•, - <��:,t � I 1 r ``��`, +tt � , t l i l• t , i t \i ( i 'it ti i, i ,' �,',+ i%I ,' � ttt ,I � � i i�V•,,3•v !��` �`� tt tt 't I ,, — 1 _ I , .II t � - t� SHEET LAYOUT SCALE: 1" = 300' 11" / "'IVs-0 lei t 1 `� �h__ �'C._t• 1, - 1 , / 4 r t \` f t. \ CURRENT OWNER /DEVELOPER WOODBRIAR ASSOCIATES P 0 BOX 5548 CHARLOTTESVILLE, VA 22905 PROJECT ENGINEER COLLINS ENGINEERING 200 GARRETT STREET, SUITE K. CHARLOTTESVILLE, VIRGINIA, 22902 PHONE: (434) 293 -3719 ".-. _..._ ._I - t Sm :\tt �`,�a J= 1 , 00 =<v (n tt \t l 1 1 t � /l mss-,\ ,.._ /•\ , `'\ I 1 /' � / -- ) I ill' \+ i /1� /N EARTH DITCH yj APPROVED Lic. No. , .II t � - t� SHEET LAYOUT SCALE: 1" = 300' 11" / "'IVs-0 lei t 1 `� �h__ �'C._t• 1, - 1 , / 4 r t \` f t. \ CURRENT OWNER /DEVELOPER WOODBRIAR ASSOCIATES P 0 BOX 5548 CHARLOTTESVILLE, VA 22905 PROJECT ENGINEER COLLINS ENGINEERING 200 GARRETT STREET, SUITE K. CHARLOTTESVILLE, VIRGINIA, 22902 PHONE: (434) 293 -3719 ".-. _..._ ._I - t Sm :\tt �`,�a VICINITY MAP SCALE: 1" = 21000' LEGEND EXISTING CULVERT DROP INLET & STRUCTURE NO. CURB & GUTTER J= 6" 00 =<v (n EC -2 DITCH �OPO q Ci /1� /N EARTH DITCH SCO T R. APPROVED Lic. No. DRIVEWAY CULVERT by the Albemarle County SUBJECT Rp <O Community Developmwnt DepadMent ���\ SITE BENCH MARKte °�____ _ Uj Filea�� ° -�-b°7 = -.. C6W1Sg1V,D C( ARKDRI VDOT STANDARD STOP SIGN Fo �v c EXISTING CONTOUR AO PROPOSED CONTOUR VICINITY MAP SCALE: 1" = 21000' LEGEND EXISTING CULVERT DROP INLET & STRUCTURE NO. CURB & GUTTER PROPOSEDSPOT R27` 27' RADIUS ON FIC FILE +SPY This copy of the approved plan is reserved for the official files of Albemarle County, Please do not remove this plan from the file. EC -3A DITCH 6" DEPTH OF EC -3A DITCH (n EC -2 DITCH o" DEPTH OF EC -2 DITCH •••--••• - EARTH DITCH SCO T R. APPROVED Lic. No. DRIVEWAY CULVERT by the Albemarle County P,�SIONAL Community Developmwnt DepadMent BENCH MARKte °�____ _ Uj Filea�� ° -�-b°7 = -.. C C VDOT STANDARD STOP SIGN --- ----------- - - - - -- 2- ---------- - - - - -- EXISTING CONTOUR - Zoo PROPOSED CONTOUR 4 � �.3 THE TOP ELEVATION DENOTES THE PROPOSED 4 -5 o ELEVATION OF THE RETAINING WALL & THE BOTTOM ELEVATION DENOTES THE LOWER EXPOSED PROPOSED ELEVATION OF THE RETAINING WALL. PROPOSEDSPOT R27` 27' RADIUS ON FIC FILE +SPY This copy of the approved plan is reserved for the official files of Albemarle County, Please do not remove this plan from the file. i rl C j L d I ^ L ) o H u _ u � D Fes- u z � i w r C OV r O = u z C > p u U i w CL (!') Z C C L i o � w , V) LU r ce u V) i r z i w i o 1 } ' O U w J w � m i J w CL W 1 V) W W z O a F J L Lj ZaU� (n 0�� OO ¢ (� SCO T R. COLLINSZ Lic. No. 035791 P,�SIONAL i rl C j L d I ^ L ) o H u _ u � D Fes- u z � i w r C OV r O = u z C > p u U i w CL (!') Z C C L i o � w , V) LU r ce u V) i r z i w i o 1 } ' O U w J w � m i J w CL W 1 V) W W z O a F J L Lj ZaU� (n m L OO ¢ (� U) w C C u III CL� C L Uj C C i rl C j L d I ^ L ) o H u _ u � D Fes- u z � i w r C OV r O = u z C > p u U i w CL (!') 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Box 4900, Scottsdale, AZ 85261 50.2630 AC LIGHT INDUSTRY 4281/241 / / - ___ I z I .1 / I I I I I \ , 1-1 " - �,.� / I t \ I f \ �, -1 �) - \ - - ­ - - --- - - - I / _,�� , / / __--r ,----- - - " - I, 1-1 11 I - " / � , , l � / I I i I I ___ - - � / / / / t - - , - - / , B 03300-00-00-001GO WOOD PROPERTY INVESTMENTS, INC. 216 Highview Lane, Charlottesville, VA 22901 0.9300 AC 3878/380 / ,� 11�� I I I __ - __ - - - I'l I �, / __ 11 , / I/ - �v - / / I I / / / 11 / � � I - , I , / / / ( \ - __ _ __ - _ - __ - - - I- __ , ��/ \ \ �1' -00-00-001A0 ROMANAC, MARTIN J ESTATE 3721 Ivy Road, Charlottesville, VA 22903 9.5300 AC 0 / � - - 1� , I 1, i f / I I \,� ( \ -_ , � I I / / ) " r ­ - - __ __ - - r / I I 11 I I / / I - - (\ - \_ / I ( ( 11� I - - - - - - ­.::!�- - -- --------- ---: ::� \ \ C 03300 - - / -,- - ,_ I " I ,z -_ / I 'r- / - ____ / I ( \ � ­� _--- -_ -_ "" - - - I D 03200-00-00-005CO NEXT GENERATION, LLC P.O. Box 5548, Charlottesville, VA 22905 19.2760 AC 1-� I I " / I, �I` I - I - _­ - - - f i i I \ - Li,- - - - _�:_ - -�: -,:� - N - 1, 11'__� / 11 - I - - " I - - - - __ _.. __ - � - z I ? - ___ 'r-4 I ) I \ __ I . E 03200-00-00-005cl UNITED STATES OF AMERICA C/O US ARMY 803 Front Street, Norfolk, VA 23510 28.8800 AC �p_ \ Z, / " I- _11, I ,� -_ -_ - ,." " � I / \ \ I _____��,���­===�, - I n�-V­V_,�. - - - ;;�- - - - - - -,-- - ­ - I \ �, I I /I - - I ____ - - - - - - . k - � _� - ..::= : - - , _:L ,_______.________ -_ I I � / � I ,� I, -, -_ -_ . _,"l- '____�___ , tp=______-_'1_1__v_1v-1/- - ----,-- -n----:--7,:-�:�-,---, .- - - - --- - -- - -_ � - ) I / - , - -- - - - ------, , - - - - __ - - - __ - I i I Ii i I \ � 1_411,,,__�� V ) - - __ - -:--7- __ - //) I - F 03200-00-00-005C2 NEXT GENERATION, LLC P.O. Box 5548, Charlottesville, VA 22905 2.4890 AC k___1 // ,/ ,- lj I� - -- - -- ___ - - e �_� i \ 5�_ 1 , - . __ - :: / " 11 / � I- - - -_ -- 11 ,� - 77T,/ I, V __ _0 - -_ ­ I ".1 __ - /I - - _.____._______1___ " ��_ - - I­ - - - - - - - - - __ - - - I' �/ I __ - - - ___ , _�,_ - ­� __�_/� - - 7-- - ___­ , -_ --=--- --��---�.,-,--------------------------.--- -------- -',, // 1 -00-00-00500 NEXT GENERATION, ILLC I __1 � - - ____ ----,-- 1, / �-,��,\ , Z,! I \ \ \__ " / >\ _____ . . ---------__-------- - I 11 , P.O. Box 5548, Charlottesville, VA 22905 3.1880 AC - ;;, --- - G - � I ( - ;1�z - re!��_ -111, - / -_ - I 1 03200 SCO T R. COLLINSZ / I" / I __ --' - - , ;O�C<��( 7-'f,' '- -- 11 - / - ___ - , I I \ , ir�:;_*V,10 , - ,�_, ,,, / - - - - 11 I / - !1 --- - - - - - 1-1. ­ ____ _< - , I "­` -, / Z I , __ __ � __ -, `,. I .� I N�:_ - � / / �� - - - __ - - - � I I- ___ - H 03200-00-00-005FO VELOCE, LLC C/O PAUL OPIELA 2101 Whipporwill Road, Charlottesville, VA 22901 6.4080 AC 2799/086 U Lic. No. 035791 _. I / t f, / / ,/ -,-- __ __ - ___ __ . - 11 I " I I \ \ _ "z - ( y -- - I / i / _ 0 " / Z, _____ - -, __ ____._________ - - ,� __ I f I , - z / /_ -- / 4:__- 11 - -- - -_ -_ -, - -- ­-, I / " I 11 r " - - --, - - I I - - I 03200-00-00-005EO CHIRO, LLC 620 Woodbrook Dr Suite 5A, Charlottesville, VA 22901 5.0230 AC / I I / // ,/ / / - - _-, - ------ , - " - I I I - / � I ;1 , .. / , , �_ - -- . -- - __ I \ I I z ___ ,- , rr" " / / / / j / I--,------ �_ __ - - _._--__��_-�_ � __ _. - - \ ,,� 11 0 1 \ �_ - -/ I ­ �� �� /__ i 032GO-00 00-OOOCO WOO DBRIAR ASSOCIATES P.O. Box 5548, Charlottesville, VA 22905 5.4400 AC )RD/C-1 (VACANT) �6 6- �-,� � I __ - - ��_ - - - ", \ - 7 71/�, / 11 �, --- I� - , - 1, 1, /I / Ill � �_ __ - �, _______ � � - :�. - __� I I __� I \ \ \ it ,jr�� 6. �� \ � .- ----- -- -- ----- - - i, STANLEY OR NAIFENG XIE 2668 Kandalwood L ine, Charlottesville, R-4 (RESIDENTIAL) .!:4� / 1-1 l I I / -I- -, ` ___�_ - . - N � I 1_j I I - I L 032EO-00-00-00200 HARRIS, BUDDY W OR KATHLEEN S 106 Camelot Drive, Charlottesville, VA 22901 0.2426 AC R-4 (RESIDENTIAL) 674/1 _�vl - � / I I - __ ___ 11 I- - __-­-_--_- _.___________ - - \ \ , - 1\ A \ r- E " -_ 11 11 � _ 4N�101VAL t - I - -\--� -_ ____ I - I I t I I , 1- ,_ Ir", , I __j I / / ,-I I � � ( 1� __ - __ - �\, I I I - I -, - I-- _.,- __ - - - __ _ -.--,- -, _\ - I I -I� I YT� �, ) I I , I I 1-- m 032GO-00-C - - IIAR ASSOCIATES 71.4230 AC PRO (OPEN SPACE) 1556/ _�V / � \ , - ,\ __ I- - _ __,_______.__ I I , , , .)i,� / / / _ P.O. Box 5548, Charl:)ttesville, VA 22905 - - - ­",-�" \ I - - - __ I- � _1 I`" - /� - ­ -, . �_� \ � I V__,_� X I :x_ 1. IN 032GO-08-00-OODAO WOO DBRIAR ASSOCIATES P.O. Box 5548, Charlottesville, VA 22905 23180 AC PRO (OPEN SPACE) 4111/477 j I, / ., / \ � __ __ --, - I - - - - - __ - �_ / , - - __ - - - __ -------------- __ __� \ , I � \ I \ \ I t I N �iii � � , - I 0 1 032GO-11 _02-00000 WOODBRIAR ASSOCIATES P.O. Box 5548, Charlottesville, VA 22905 0.7930 AC PRO (OPEN SPACE) 4111/477 / / / __ - A /I - \ _q - - I- \ __ __ \_ __ � ___ / _. - - 1� - . I \ I I I �, - " I � I �- � - I - , / J I I / / / / �_ _- ___-, _11 - - - _1/ 11 I ill - - ___ __ __ - - .,�_ _� \ I I i I I I / I - I i I � I I p \ \ - I � � __ - . I I 00 DnMIRVVUUU nUIVIEUMMCRO M­­M11­M P.O. Box 7146, Charlottesville, VA 22906 3.4000 AC PRO (OPEN SPACE) / / ___ I __\ - - __ - - ___ - \ I t I I \ , � \ � � :ii 11 -4-)rzn-03-00-08300 ­1 ­­ ___ I ............... I ­­1 ­­ . Box 7146, Charlottesville, VA 22906 3.2650 AC PRO (OPEN SPACE) 781/574 t - I, I \ - - - I /_ - -�. �Mj � - n I n - I . - / I I - - / - il 1, - I ;;i��; :: �.�i�� . z / f I _.- - �1_ ----- - __ I,- - *111_ - ( I \ I I / -7 , � : 1j : 1�!�� Irwi % f / \ - - \ - ­ ­_ --- - - - ,z I ��!!��:i��!!�i� i�����f.,��l�� P,��!�� 032GO-113- iRIAR ASSOCIATES P.O. Box 5548, Charlottesville, VA 22905 PRO (OPEN SPACE) 4111/477 0 � \ � I � - - - - - - - I - - -� -:� - - - - - - - -- - - - - _� __�� I - - -- -A -- `­1 t. - I -V---- __ - - 11 \i ---" __ ____I - ( \ \�g ;;;1;,X:;;; 1. X X: ........ JAMILA 2111 MICHIE DRIVE APT 17, CHARLOTTESVILLE, ,. � ___ _1 , -.---- _ PRO (RESIDENTIAL) 1 4164/07- �_ .., - \ - - - I I , - - - - - � I - �_ � / � ), / I � , - � ... � - < , - I I` \ - - -I,& - - ___ __ '�� �__ -A -----, - :; - -_ ESIDENTIAL) 1 4273/389 U) \ \,--.---.-- I \ _,�: ___ / I / I - __ ______ ----- -- -- ----- RYOOjI OON ORSO YOUNG PARK 4511 BRIARWOOD DRIVE, CHARLOTTESVILLE, VA 22911 1 0.1320 AC , PRO III ll \ , I _-, I- ,�-"­ , �,-- - __ _\__ - 01 V, , l � �_ I N .:;,_`,RR:,�:::­;; :::: : L - __ I . im� � 1v "__ - _\ - , _ I 11 / / �Zl> / / Q� \ \- - � - , - _�_� - - - __� : i::: ���*i ii,�i. " "', � >1 / I I I I uj , - /�X, - I - ___ - - - > - - - - __ - \ / - __ _. C - - 1_'1 � ,- __1 - - ­..... ...... ... I I // / /// - - , >� �. 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I / __ __1 ///--- � - I / - \ I / - - / - _­ '� � p \_� '�i - - / I ___ R. INS� " ` /I- __ /_ __ - � `RE� / [, T Co L SCO7 `_ I/ I/ "11-111 ,/_ / - '---- 0 � qj�_ "-, �"/,//Il/ / / // I- - / - , OfL I C - nNO 3'L5 7 ------ 'l F�_ E 6 ) , _ I � -) - / - __ _ 0 ,�� - __ I - � _`1_,i, , _ -, ,l�_ _,�� � i,_ �__ \�_,(. - A- �,P\_: '� ;'1--_ �__ ;�_' /t_"_'N,l__ - " */�, v ,_�_ ��, oi� � I I r - I - - I *;;;mu 1 = 80' ( IN FEET ) SHEET NO. � I inch = 80 ft. 2 . — IN, �t .BYMMBMIOm N SEE WPO AMENDMENT PLAN ENTITLED 'BRIARWOOD UNDERGROUND DETENTION' - - FOR DA #iB & 1C STORMWATER -- _ MANAGEMENT COMPLIANCE E ENO NO- _ r f PRE - DEVELOPMENT NOV 0 DA #1C - \ _3j _._...- 1� �."- -• ___ - ° (j � �`� �' - '`' -_._ _-- �-, ..��.%r'", /� /��,�'r'�'~`. -,� •�- -- _ -"`ice/ �f fOF:,A oo � ps % ✓i / ' / %�i. ` \�\ \\\\ \\ \ rS / % / DA #2 �v CN =55.6 M��� /� - (' EXISTING DROP INLET& Tc- o.l3hrs. STORM SEWER DRAINING _ \ h _ ` �� --- � � �.-% �\ ,'�„ - EXIsI'1T�IG SEDI�NT BAN ( ( UPLAND AREA DA #2 TO ._y � i / �! REMAIN UNDISTURBED -PROVIDING WATER QUALITY (� / J �// �/� --' ` r(� d �- _ I ' _TREATMENT &DETENTION r- / l PROPOSED O BE REPLACED OWN l _' _ -- _ ` �- = SEPARATELY UNDER 1 r - - _ _ _ T` OF CA \ - -'- DIFFE.�EN- _z� _-- ---.- - _ t(- ..- ....�.�F_ _.. -- >Y��f,,,,- J�- v,P,,,,Y Y.x. - -_- .-- ;" -Y.-- -- •' �--?� -v-- =- -- _ - �YY - --- r.---- ..�'ri --._ CONCRETE -- PIEEOUT E - �- Routing Method: storage- indication Basin: Briarwood Extended Detention Basin- DA 2 4 Outlet Structures 3 Inflow Hydrographs 2 -Year, 24 -hr Peak SCS Storm Event m C =� Outlet structure o 2 -Year, 24 -hr Peak SCS Storm Event a 5 Contour Areas Orifice Area (acres) 3.840 discharge (cfs) 0.438 at 12.28 (hrs) "IN. %Wr - _ water level (ft) 426.779 at 12.28 (hrs) 424.30 217.00 0.0 area (sf) 0.049 .�" {bd ' ' ' l f d� 50 -`- --' - 100 --' '_..200 - �..•"`\ ( IN FEET ) 1 inch = 100 ft. STORMWATER MANAGEMENT NARRATIVE THE CONTRACTOR SHALL INSTALL A SEDIMENT BASIN TO CONTROL RUNOFF ASSOCIATED WITH THE CONSTRUCTION OF THE ACCESS ROAD. THE SEDIMENT BASIN SHALL THEN BE CONVERTED TO AN EXTENDED DETENTION FACILITY. THE CONVERSION SHALL ONLY OCCUR AFTER UPLAND AREAS ARE STABILIZED AND THE SEDIMENT BASIN IS NO LONGER REQUIRED. CONVERSION OF THE SEDIMENT BASIN SHALL ONLY OCCUR AFTER THE COUNTY INSPECTOR HAS PROVIDED HIS/HER APPROVAL. THE SWM PLAN WAS ANALYZED FOR THE POST- DEVELOPMENT STATE, WHICH IS FOR THE INSTALLATION OFTHE ACCESS ROAD, AND ANALYZES THE RUNOFF WITHIN DRAINAGE AREA #2. THIS POST- DEVELOPMENT STATE WAS THEM COMPARED TO THE PRE - DEVELOPMENT STATE. THE WATER QUALITY ANALYSIS CAN BE FOUND ON THIS SHEET, AND COMPLIANCE IS ACHIEVED THROUGH THE INSTALLATION OF THE EXTENDED DETENTION FACILITY. THE REQUIRED REMOVAL RATE FOR THIS WATERSHED IS zo %AND THE PROPOSED FACILITY PROVIDES A REMOVAL RATE EFFICIENCY OF 35%. THE DETENTION FOR THIS PROJECT IS ALSO PROVIDED THROUGH THE INSTALLATION OF THE EXTENDED DETENTION FACILITY AND POST- DEVELOPMENT PEAK FLOWS ARE REDUCED TO BE LESS THAN THE PRE- DEVEOPMENT FLOWS. Watershed Summary 2 year Storm Event DA #2 (Present) 1.78 cfs > DA #2 (Developed) 0.44 cfs 10 year Storm Event DA #2 (Present) 7.03 cfs > DA #2 (Developed) 4.18 cfs i EXISTING 024" CMP TO EXISTING 24" CMP BE PGRAD H , I CULVERT9UTLET PROPOSED DEVELOPM �- l - p - Ai r ,/I >r : NUNN FIM/3L Tr9.11 hrs. loo' OFO.L.P w/ \ELEV.12' \ T -0.11 hrs. 751 OF �. F. AT 418 fp t Tc -q-oo hr, PROPOI SEE WPO AMENDMENT PLAN ENTITLED 'BRIARWOOD UNDERGROUND DETENTION' FOR DA #1B & 1C STORMWATER MANAGEMENT COMPLIANCE CN =68.4 --_Tc= oi3hrs: DA #2 SHALL BE TREATED & DETAINED VIA AN EXTENDED DETENTION FACILITY woo woo SEPARATE Y UNDER A r DFFEBENT - §t-f OFYCA �. z. v vti d - -- -- v v r CONCRETE - IPE U CONTRACTOR SHALL EXCj VATE SEDIMENT -LADEN SOIL , AND REGRADE THE FACILITY TOINCORPO T - -- - OI- H IM- THE FA IL._L.L..-_Y : A l aStTA- rF- ... C� ===-- - -- - - P A D TC PROPOSED SUBSTANTIAL V -NOTCH RIPRAP ARMORED DITCH. VDOT D =6" STD. EC -1, CL. II RIPRAP TO EXTEND FROM EXISTING 18" CONCRETE PIPE OUTFALL TO LIMITS OF PUBLIC RIGHT -OF -WAY. ENCROACHMEN 1 ONTO PRIVATE PROPERTY IS NOT PERMISSIBLE. (6' WIDTH) Short Version, BMP Computations; For Worksheets ,2 - 6 Albemarle County Water Protection Ordinance. Modified Simple Method Plan: Briarwood Commercial Master SWM Plan Water Resources Area Development Area Pre aver: FGM PE Date 29-May-14 .,.., I ... ,., ...., _,..,.. .... ......... _... Project Drainage Area Designation DA# 2.� , L storm pollutant export in pounds, L [P(Pj)W12 ] [ C(A)2 72 J Rv man runoff coefficient, Rv = 0,05 4- 0.009(1) Pi small storm: correction factor, 0,9 ( percent irrr.perviousness P annual precipitation, 43" in Albemarle A project area in acres in subject drainage area, - 3N f (DA #2- SWM Facility's Watershed) C pollutant concentration, mg /l or ppm target phosphorus f factor applied to RR V' required treatment volume in cy, 0;5" over imperv. area, A(1)43566(0.5/12)127 RR required removal , L(post) - f XL(pre) %RR removal efficiency , RR100 /L(post) Impervious Cover Computation (values in feet & square felt) ... _ -.. lteml pre development_ Area past- development, ._._ . subtotal_ subtotal EAsting Rte 29 900 Existing Rte. 29 mm. 900 TH Development - 1550 TIH Development 1,550 Impervious Areas from Access Roam_____ 31,000 2450 (Ilncludes Proposed Rte 29 turnlane) Active d Cultivated turf .Area.... Grassy Areas ards an p Y _. . - -- -- - - -.. _._aX 0.08 - - -- - - -° - -- -- - -- 133,820x 0 os Other Impervious Areas - 0 Impervious Cover 1 5 °l0 I(Pre) Rv(post) V i ..T 0 F .68 1•r.; New [development (Far Development „Areas�extst�ng lmpervlous cover 20%) C f ! I (pre) * Rv(pr� L(pre) L(post) RR % RR Area Type oft[ 0 23 3.49 4.36 0 2a °70 Development Area ........... ' rrlin, values I( post) ( IN FEET ) 1 inch = 100 ft. ' POST - DEVELOPMENT IN- r NDER Q ND -- - AREAS NOT PROPOSED WITkI TH15 2LAN - r DETEPITIl- -- - == -- SYSTM:#3 PROPOSE 'OF 024" CL. '` EXISTING 24 "CMP III RCP. SEE ROA FOR i CULVERT OUTLET A #sB & SHALL BE-TREATED-VIA------- ✓ FILTERRA INLETS & Ft tlVA`TEt2 QUALITY- ' ADDITIONA�,,DESIG INFORMATION. ---- .r-- -- --- -- -�- - --- L UNDERGO � Di=TE . -10_NS- YSTEM - #i - - N3 '-_ t_JNp r R P DITC - -- d D =6" y PROPOSED SUBSTANTIAL V -NOTCH RIPRAP ARMORED DITCH. VDOT STD. EC -1, CL. II RIPRAP TO EXTEND FROM EXISTING 24" CMP OUTFALLTO STREAM BANKS. SHOULD RIPRAP INSTALLATION ENCROACH ONTO PRIVATE PROPERTY, DEPENDING UPON CURRENT SEASONAL ALIGNMENT OF STREAM, SIGNED PERMISSION SHALL BE FURNISHED TO COLLINS ENGINEERING & COUNTY $' WIDTH) ENGINEERING PRIOR TO PLACEMENT OF RIPRAP ON OFFSITE PROPERTY. SCS ROUTING CALCULATIONS- POST DEVELOPMENT Storage Input Data Outfall Control Structures Inflow Hydrographs Routing Method: storage- indication Basin: Briarwood Extended Detention Basin- DA 2 4 Outlet Structures 3 Inflow Hydrographs 2 -Year, 24 -hr Peak SCS Storm Event m C =� Outlet structure o 2 -Year, 24 -hr Peak SCS Storm Event inflow (cfs) 4.979 at 11.9z (hrs) 5 Contour Areas Orifice Area (acres) 3.840 discharge (cfs) 0.438 at 12.28 (hrs) Elevation(ft) Area(sf) Computed Vol.(cy) name:3ohr Drawdown Orifice CN 68.400 water level (ft) 426.779 at 12.28 (hrs) 424.30 217.00 0.0 area (sf) 0.049 Type 2 storage (cy) 228.866 426.00 3899.00 105.7 diameter or depth (in) 3.000 rainfall, P (in) 3.700 428.00 5953.00 467.9 width for rect. (in) 0.000 time of cone. (hrs) 0.1100 10 -Year, 24 -hr Peak SCS Storm Event 430.00 8356.00 995.4 coefficient 0.600 time increment (hrs) 0.0200 inflow (cfs) 11.241 at 11.92 (hrs) 432.00 10755.00 1701.3 inivert (ft) 424.300 time limit (hrs) 30.000 discharge cfs 9 (cfs) 4.181 at 12.08 (hrs) multiple 1 fudge factor 1.00 9 water level (ft) 427.938 at 12.08 (hrs) Start- Elevatiori 424.30 VOL(cy) 0.00 discharge into riser routed true storage (1 454.286 peak flow (cfs) 4.98o Outlet structure 1 peak time (hrs) 11.923 loo -Year, 24 -hr Peak SCS Storm Event Orifice volume (cy) 537.488 inflow (cfs) 24.966 at 11.92 (hrs) name :Midflow Orifices discharge (cfs) 16.459 at 12.04 (hrs) area (sf) o.196 10 -Year, 24 -hr Peak SCS Storm Event water level (ft) 429.487 at 12,04 (hrs) diameter or depth (in) 6.000 Area (acres) 3.840 storage (cy) 842.890 width for rect. (in) 0.000 CN 68.400 coefficient o.600 Type 2 invert (ft) 426.710 rainfall, P (in) 5.600 multiple 4 time of conc. (hrs) 0.1100 discharge into riser time increment (hrs) o.o2oo time limit (hrs) 30.000 Outlet structure 2 fudge factor 1.00 Culvert routed true name:Barrel peak flow (cfs) 11.242 multiple 1 peak time (hrs) 11.923 discharge out of riser volume (cy) 1213,361 D (in) 24.000 h (in) o.000 loo -Year, 24 -hr Peak SCS Storm Event Length (ft) 6o.000 Area (acres) 3.840 Slope 0.005 CN 68,400 Mainning's n 0.013 Inlet icoeff. Ke 0.500 Type 2 rainfall, P (in) 9.100 Equation constant set 3 time of conc. (hrs) 0.1100 Invert (ft) 424.240 time increment (hrs) 0.0200 time limit (hrs) 30.000 Outlet structure 3 fudge factor 1.00 Weir routed true name: Riser Standpipe peak flow (Cfs) 24.968 diameter (in) 30.000 peak time (hrs) 11.923 side angle 0.000 volume (cy) 2694.911 coefficient 3.300 invert (ft) 428.96o (multiple 1 discharge into riser } SCO R. OLLINS'Z Lie. No. 035791,E Vk IONAL U) z 1 LU g i O 1 i O � J 1 Q ) 1 IL m i J a i w a W > � a -1 1714 OO ° 00 z O F J e (� r / ZW U m C =� ° z O (_J J e N � w � C '- u i' UJ C ce F U) z 1 LU g i O 1 i O � J 1 Q ) 1 IL m i J a i w a W > � a -1 1714 OO ° 00 SWM FACILITY NOTES,• 1. TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICES IN ACCORDANCE w/ THE DETAILS SHOWN THIS SHEET, OR EQUIVALENT. 2. ALL ORIFICE COEFFICIENTS WERE ANALYZED WI VALUE OF 0.6 3. ALL WEIR COEFFICIENTS WERE ANALYZED WITH VALUE 3.3 4. MINIMUM 8' WIDE ® TOP & 8' DEEP IMPERVIO CORE W A CUTOFF TRENCH & 1:1 SIDE SLOPES. F EMBANKMENT DETAILS ON THIS SHEET FOR ADDITION INFORMATION. 5. MAXIMUM PONDING DEPTH EQUALS 7.70' (432' OF DAM - 424.30' LOW -FLOW ORIFICE). DISCHARGE APRON PROVIDE PROPER PR07EC77ON PRIG RELEASING RUN -OFF THE BASIN' s CH, DRY DETENTION FACILITY SHALL 1- LOW FL OW GRASS LINED CHANNEL. Ch SHALL CONVEY STORM SEWER DRAINA LOW -FLOW ORIFICE WITHIN THE RISER MIN.). LOW -FLOW ORIFICE SHALL BE THi POINT OF FACILITY AT ELEVATION 4, 440 440 N Forebay ROPOS GRADE ......... Contours 4'26 351 Stormftvm MUL T- 5 TAGS 040" RIS� ROUND SERIES TRASH RACK 1,482 3,458 CONCRETE MANHOLE 8,356 26,875 432 s3TAM4AFiO 130 INCH RACK SHOWN 45,935 SHRUBS & GRASSES CA DIMENSIONS IN INCHES RIM ELEV. = 424.96: S 73 HOPE I nNIMWAA MAITICIIY a PLAOM gSiLU31Cfte, Iht7. CORNUS ALGA rH A 24" ht. �8 5' C DE RlP EST EL�V. AP LINE = - 428 SPILL WITH 2� _........ AY 1 �:d' t e q 1. 'F 7HlS SHEET RACK D FO TAIL. TRASK § .y ,s s - - - - -- t I A 435 w�•'S 1$:' p.° ;. l at'J' l '; it I., � SID SLOPE . 2' VOL E FOREBAY U V) m n X(S77N I ° PLAN 435 JS StormRe%'m Round Series for Concrete Manhole CONCRETE 6TRUCTURE DIMENBIONB OP OF AM EL V = 430 U o L 85.24 11YS 14A 38 - -GRADE z 85 35 :, - -p - 21 1Ti . __ - - 3b - W49 -- -- s ;EE RSA 27 to S4 85-66 27 } 19 }s fib}, 41 37 so 74 AVAILABLE OPTION& _ Vn L CROSS BRACING FOR OVE'sRt-IO Ell - _ z� HDPE ANTI- VORTEX PLATE 10' IMDEr TOP OE DAM CUSTOM AL VDOT S ORNh'l18Y AWD BY, 5 ° v PO DOIX 439ti,19tttuhr", VA UdO4 i s� zs9 Machu Rd, Vfine tum, VA Satsaa (977) 977-3727 pholta - - 1- �_- _...... __. -- - - -__ EL V. =.._432'_. TOP EW -1 w u tY C 430 s,_ 1> i 430 _ _ _r 0ATR4CT0R lITI ZE TIE HALL � OY 06" EWAT THE RING SHALL COUP �,, CONTRACTOR .FHALL FRILL HR )R TO _.. - -.. -`w ��� . x� _ 06e'-- A>€Il -FLO ORIFI ES.......W H AN INTO 6.71 FOR ADDITfO�AL D ENTIO tNNEL 425 425 _ _ � DOT TD ECG --1, CL. Il, TYP 100 YEAR W. SI E. = 429. X49' A RI ' -RAP ►Iv/ GEO EXTILE AVE A 10 - YEAR WISE. -- =42 -- .94 �--- - l FA RlC UN ERLAY ENT. 4NNEL YEAR ( W. S E. = 26.78' �E TO (0.59 CONTR CTOR HALL I RILL A 03" 3 -Ter 7 7 420 DI�AWDOW ORIFyrCE AT ELEVA'ION 420 LOW X4.30. 4 4' 31T / - A- fi�S`lY A (- 4" CL. GOLF III RC 0.5090 BA EL SUPPORT RISE STRUgTURE IN NYER7j IN=4 .30' _._�.._..�......... ... NVER�T -OLTT= 24.00' ONTRA�(' TOR S///ill����j�'ALL EMBED THE 415 I 415 MINIMUM) ray' CONCRETE BASE LU U-1 J J O d O to ch to O W W C7 C� O M �t M M d co N M d N M d- N N �t N W U_ d• d• 0 +50 1 +00 1 +50 2 +00 2 +50 3 +00 SCALE SWM FACILITY 1"=5'(V) 1"=50' (H) TREES UP TO 4" CAL. SHALL BE STAKED \ I WITH 2 -2 "x2" HARDWOOD STAKES. TREES OF 4" CAL. OR LARGER SHALL BE GUYED WITH 3 EQUALLY SPACED, TWISTED, AND TURNBUCKLES. LOOP HOSE AROUND TRUNK. FLAG WIRES WITH COURVEY TAPE. REFER TO SPECIFICATIONS FOR OUBLE STRAND #12 � FURTHER INFORMATION D GAUGE WIRE WITH RUBBER t HOSE & TURNBUCKLES 2 "x2" HARDWOOD STAKE t CUT & REMOVE BURLAP FROM TOP i' �� - II I /_ 1 1/3 OF BALL AS SHOWN IM � TURNBUCKLES ES 2/3 UP TREE REEOSE AND SCARIFY SUBSOIL T04 "MIN. DEPTH �y 2"x2" (HARDWOOD STAKES, ALIGN �i MULCH SAUCER -/r TOP OF STAKES FINISHED GRADE /1 MIULCH SAUCER I TREES . TO 4" CAL. SHALL BE �/ ^ �JI �I J'\� AMENDED SOIL MIX STAKED. TREES 4" CAL. OR j 'I IJ,1 LARGER SHALL BE GUYED WITH 3 EQUALLY SPACED TWISTED, I. III . _ #12 GAUGE WIRE WITH HOSE r. OF TREE AND TURNBUCKLES. LOOP _ HOSE AROUND TRUNK ABOVE BRANCHES AS SHOWN, FLAG : I ( OUT AND REMOVE BURLAP FROM TOP WIRES WITH COURVEY TAPE. I �T = = 1 F BALL I /3 O LAS SHOWN I =1 I III E FOR I I -I I_ =III- . , . •mac `''.... ,.... :.: REFER TO SPECS O -I ::� _::::. I III -I I ADDITIONAL INFORMATION. I I -_- - SCARIFY SUBSOIL TO 4" MIN. DEPTH AMENDED SOIL MIX -� I I- III - III =III =I (I -I I -III 1 =I I -� COMPACTED SUBGRADE COMPACTED SUBGRADE -I 1I- Tree Planting and Staking Detail Not To Scale Evergreen Tree Planting Detail Not To Scale LEXIBLE TUBING 4IFICE. 3) ADDITIONAL rNVERT ELEV. T DRAWDOWN EXTENDED DETENTION FACILITY SUMMARY CONTRACTOR SHALL RETROFIT THE SEDIMENT BASIN & INSTALL THE PROPOSED EXTENDED DETENTION FACILITY SHOWN. CONTRACTOR SHALL INSTALL A SEDIMENT FOREBAY, AS SHOWN ON THESE PLANS, AND ENSURE POSITIVE DRAINAGE IS MAINTAINED AT ALL TIMES WITHIN THE SWM FACILITY TO THE RISER STRUCTURE. THE CONTRACTOR SHALL DRILL A 03" 30 -HOUR DRAWDOWN LOW -FLOW ORIFICE IN THE RISER AT THE FACILITY's LOW POINT, RECONFIGURE THE ESC DEWATERING ORIFICE AND INSTALL THREE (3) ADDITIONAL 06" MIDFLOW ORIFICES WITH AN INVERT ELEVATION EQUAL TO 426.71'. PLEASE NOTE THE MID -FLOW ORIFICES ARE DESIGNED ABOVE THE MINIMUM 2x THE WATER QUALITY VOLUME ELEVATION AND PROVIDE DETENTION ABOVE MINIMUM REQUIREMENTS ENSURING DRAWDOWN FOR THE 30 HOUR LOW -FLOW ORIFICE. CONTRACTOR SHALL ESTABLISH A PERMANENT GRASS GROUND COVER WITHIN THE EXTENDED DETENTION FACILITY UPON CONVERSION OF THE FACILITY. 03" 30 -HOUR DRAWDOWN LOW -FLOW ORIFICE INVERT ELEVATION= 424.30' (CONTRACTOR SHALL DRILL SEDIMENT BASIN RISER) FOUR (4) 06" MID -FLOW ORIFICES INVERT ELEVATION= 426.71' (CONTRACTOR SHALL CONVERT DEWATERING ORIFICE & DRILL SEDIMENT BASIN RISER) 2x WATER QUALITY VOLUME REQUIRED= 3,680cf WATER QUALITY VOLUME PROVIDED= 6,326cf 0 30" RISER RIM ELEVATION= 428.96 ( CONTRACTOR SHALL UTILIZE SEDIMENT BASIN N RISER) 024" BARREL: 60'@ 0.50 %, INVERT IN= 424.30'& INVERT OUT= 424.00' (CONTRACTOR SHALL UTILIZE SEDIMENT BASIN BARREL) 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. EXTENDED DETENTION FACILITY DATA; Total Proposed Contributing Impervious Area= 31,000 Sf 1x Water Quality Volume Per Alb. Co. Modified Simple Method= 1,840 cf 2x Water Quality Volume (Minimum Required)= 3,680 cf Water Quality Volume Provided for 30 -hr': Drawdown= 6,326 cf Elevation Forebay Volume ......... Contours 4'26 351 Stormftvm 428 845 1,160 ROUND SERIES TRASH RACK 1,482 3,458 CONCRETE MANHOLE 8,356 26,875 432 s3TAM4AFiO 130 INCH RACK SHOWN 45,935 SHRUBS & GRASSES CA DIMENSIONS IN INCHES SUMMERSWEET CLETHRA 18" ht. 16 73 HOPE I nNIMWAA MAITICIIY a PLAOM gSiLU31Cfte, Iht7. CORNUS ALGA RED TWIG DOGWOOD 24" ht. �8 3 IV A f N i i I� CIUARTGR iCOY4�N 1 lYw:hliNA"FrSRACiFIBff 18" ht. �:d' t e q 1. 'F l'yY. !�✓"" I I i n i I t : �.s'4 11 7' , t § .y ,s s I � t I r�°` ��"�iw.�....a.se.s•• w�•'S 1$:' p.° ;. l at'J' l '; it I., � °e 13`� iy, �., � I:.�,�, '1 + U V) m n O C U C I ° PLAN SIDE VIEW ISOMETRIC StormRe%'m Round Series for Concrete Manhole CONCRETE 6TRUCTURE DIMENBIONB Part lie Dim A DIM I DIM C MIn 113 rAn C€G INSIDE STRUCTURE DIMENSION U o L 85.24 11YS 14A 38 OU7210E STRUCTURE DIMEN8IDN 24 8fl z 85 35 :, - -p - 21 1Ti . __ - - 3b - W49 -- -- s RSA 27 to S4 85-66 27 } 19 }s fib}, 41 37 so 74 AVAILABLE OPTION& Vn L CROSS BRACING FOR OVE'sRt-IO Ell z� HDPE ANTI- VORTEX PLATE Plastic Solutions, CUSTOM Ww DATE: ORNh'l18Y AWD BY, 5 ° v PO DOIX 439ti,19tttuhr", VA UdO4 i s� zs9 Machu Rd, Vfine tum, VA Satsaa (977) 977-3727 pholta t34% 74,U10 kx hii� /I►.p6ru�- rolutlan.mat 6EiFI4• ce TREES UP TO 4" CAL. SHALL BE STAKED \ I WITH 2 -2 "x2" HARDWOOD STAKES. TREES OF 4" CAL. OR LARGER SHALL BE GUYED WITH 3 EQUALLY SPACED, TWISTED, AND TURNBUCKLES. LOOP HOSE AROUND TRUNK. FLAG WIRES WITH COURVEY TAPE. REFER TO SPECIFICATIONS FOR OUBLE STRAND #12 � FURTHER INFORMATION D GAUGE WIRE WITH RUBBER t HOSE & TURNBUCKLES 2 "x2" HARDWOOD STAKE t CUT & REMOVE BURLAP FROM TOP i' �� - II I /_ 1 1/3 OF BALL AS SHOWN IM � TURNBUCKLES ES 2/3 UP TREE REEOSE AND SCARIFY SUBSOIL T04 "MIN. DEPTH �y 2"x2" (HARDWOOD STAKES, ALIGN �i MULCH SAUCER -/r TOP OF STAKES FINISHED GRADE /1 MIULCH SAUCER I TREES . TO 4" CAL. SHALL BE �/ ^ �JI �I J'\� AMENDED SOIL MIX STAKED. TREES 4" CAL. OR j 'I IJ,1 LARGER SHALL BE GUYED WITH 3 EQUALLY SPACED TWISTED, I. III . _ #12 GAUGE WIRE WITH HOSE r. OF TREE AND TURNBUCKLES. LOOP _ HOSE AROUND TRUNK ABOVE BRANCHES AS SHOWN, FLAG : I ( OUT AND REMOVE BURLAP FROM TOP WIRES WITH COURVEY TAPE. I �T = = 1 F BALL I /3 O LAS SHOWN I =1 I III E FOR I I -I I_ =III- . , . •mac `''.... ,.... :.: REFER TO SPECS O -I ::� _::::. I III -I I ADDITIONAL INFORMATION. I I -_- - SCARIFY SUBSOIL TO 4" MIN. DEPTH AMENDED SOIL MIX -� I I- III - III =III =I (I -I I -III 1 =I I -� COMPACTED SUBGRADE COMPACTED SUBGRADE -I 1I- Tree Planting and Staking Detail Not To Scale Evergreen Tree Planting Detail Not To Scale LEXIBLE TUBING 4IFICE. 3) ADDITIONAL rNVERT ELEV. T DRAWDOWN EXTENDED DETENTION FACILITY SUMMARY CONTRACTOR SHALL RETROFIT THE SEDIMENT BASIN & INSTALL THE PROPOSED EXTENDED DETENTION FACILITY SHOWN. CONTRACTOR SHALL INSTALL A SEDIMENT FOREBAY, AS SHOWN ON THESE PLANS, AND ENSURE POSITIVE DRAINAGE IS MAINTAINED AT ALL TIMES WITHIN THE SWM FACILITY TO THE RISER STRUCTURE. THE CONTRACTOR SHALL DRILL A 03" 30 -HOUR DRAWDOWN LOW -FLOW ORIFICE IN THE RISER AT THE FACILITY's LOW POINT, RECONFIGURE THE ESC DEWATERING ORIFICE AND INSTALL THREE (3) ADDITIONAL 06" MIDFLOW ORIFICES WITH AN INVERT ELEVATION EQUAL TO 426.71'. PLEASE NOTE THE MID -FLOW ORIFICES ARE DESIGNED ABOVE THE MINIMUM 2x THE WATER QUALITY VOLUME ELEVATION AND PROVIDE DETENTION ABOVE MINIMUM REQUIREMENTS ENSURING DRAWDOWN FOR THE 30 HOUR LOW -FLOW ORIFICE. CONTRACTOR SHALL ESTABLISH A PERMANENT GRASS GROUND COVER WITHIN THE EXTENDED DETENTION FACILITY UPON CONVERSION OF THE FACILITY. 03" 30 -HOUR DRAWDOWN LOW -FLOW ORIFICE INVERT ELEVATION= 424.30' (CONTRACTOR SHALL DRILL SEDIMENT BASIN RISER) FOUR (4) 06" MID -FLOW ORIFICES INVERT ELEVATION= 426.71' (CONTRACTOR SHALL CONVERT DEWATERING ORIFICE & DRILL SEDIMENT BASIN RISER) 2x WATER QUALITY VOLUME REQUIRED= 3,680cf WATER QUALITY VOLUME PROVIDED= 6,326cf 0 30" RISER RIM ELEVATION= 428.96 ( CONTRACTOR SHALL UTILIZE SEDIMENT BASIN N RISER) 024" BARREL: 60'@ 0.50 %, INVERT IN= 424.30'& INVERT OUT= 424.00' (CONTRACTOR SHALL UTILIZE SEDIMENT BASIN BARREL) 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. EXTENDED DETENTION FACILITY DATA; Total Proposed Contributing Impervious Area= 31,000 Sf 1x Water Quality Volume Per Alb. Co. Modified Simple Method= 1,840 cf 2x Water Quality Volume (Minimum Required)= 3,680 cf Water Quality Volume Provided for 30 -hr': Drawdown= 6,326 cf Elevation Forebay Volume ......... Contours 4'26 351 0 428 845 1,160 430 1,482 3,458 1f' Mnax plated ha ak ak taehod Ath E1/8. tact anon, I�c�llic:trte i =lpe Basin Volume. Eley,�tion ft Contours cfll 424.3 217 0 426 3,889 2,854 428 5,9531' 12,633 430 8,356 26,875 432 10,755 45,935 1f' Mnax plated ha ak ak taehod Ath E1/8. tact anon, I�c�llic:trte i =lpe s, 1 /4" IIDP�E ple.Lo (ropLtonat) BOTANICAL COMMON NAME SIZE CANOPY (so QUANTITY Q rinPts Wtr4Y4tkAI 11 dta(' RIn €'C PLATANUSACERIFOLIA LONDON PLANETREE 21/2 "cal. 2- 1/,fl" holaz an 1/4 plate srmnu(uctur(id b,} Flastic SMALL FLOWERING TREES CC 00 ".-. 00 Sawt €one ine. ov rtrtil * sh❑ o oiLh vpUue d plate= }I1)}"E' �Lriictf•a'r`ul Jelu dad :xlt }i. l /tl" hides and 1/4 plate . rani ufust.ut 1 by Pleads =oautruna lav: or, c ual 5/6 did_ h ,lr. 3ingf. BAP DEBRIS (!AGE Iery'iit:ltlfl PLASTIC �>r i It=" t tt77 t P 1 Box 4,386 Ar OLLITjONS i4.a+ester'CY J184 I I 477-077-5727 Perforated cc FOUNDATION DRAIN c�3_t)1 -1 a t-- - -.........,. - „..,. , I ,min I_ `-cut off trench -4 below suitable L _... -.. - __.. - material - Soil or rack _........_.. �. _ -. TYPICAL HOMOGENEOUS EMBANKMENT filtr Say drain Sand, grtivel or rock drain outlet .Rock tea Transition filter CHIMNEY DRAIN �`crtu-c�e� :S'C "S'.�rtgiineeri�;'� Field /Ulurrual BRIARWOOD ROAD - PLANT SCHEDULE SYM BOTANICAL COMMON NAME SIZE CANOPY (so QUANTITY TREES PA PLATANUSACERIFOLIA LONDON PLANETREE 21/2 "cal. 422 1 5 SMALL FLOWERING TREES CC CERCIS CANADENSIS REDBUD 6 -7' ht. 124 6 SHRUBS & GRASSES CA CLETHRAALNIFOLIA SUMMERSWEET CLETHRA 18" ht. 16 73 CO CORNUS ALGA RED TWIG DOGWOOD 24" ht. �8 3 IV (TEA VIRGINICA'HENRY'S GARNET' HENRY'S GARNET (TEA 18" ht. 64 48 Transition fill Rock or '- Blanket drain BLANKET DRAIN Rock or gravel drain 9v Transition filter TOE DRAIN EXTENDED DETENTION SWM FACILITY #3 DETAIL- SCALE 1'r =30' / f j r CONTRACTOR- SHALL EXCAVATE --"SEDIMENT -LADEN SOIL AND RERADE THE SEDIMENT / ;� J ROPrISED FOREBAY / �' BASIN TO INCORPORATE A J. / ` A'IDTI --23 ,� �SEDIMENT FOREBAY WHILE • J / LENGTH=9 ,ENSURING PCISITIVE ' DRAINAGE AT ALL TIME TO /2' WIDE F REBAY TOP PROPOSED VAR. OF DA � %ELEV. = 430' THE RISER STRUCTURE. WIDTH SWM - - - - - - - ACCESS EASEMENT - - L . ' p i J I MINIMUM RzWQV REQ'D= 3, 68OCf j. / J WQV PROVIDED =6, 326cf J / I BETWEEN 30 -hr DRA#rDO)VN f / I MIDFLOW ORIFICES SEE THIS SHEET I 1+00 FOR ADDITIONAL / J DETAILS I 030" CL. III RCP RISER RIM ELEV. 1 = 428.96' w/ 03" 30 -Ar DRAWDOWN LENGTH= 89 I ORIFICE AT ELEV. 424.30. FOUR (' 06" I MIDFLOW ORIFICES TO PROVIDE i J 5' WIDE FOREBAY b D.DITIONAL DETENTION AT ELEV. 426.7f' Qll SPILLWAY CREST ELEV. = 428 I 24.. BARREL RCP 60LF ® . 507- ' J x I INVERT IN INVERT OUT = 424.00 ... p _ �/ ,/ .- r ----- -- - --- [_'= --__ we - -_--y ------ y _ _. -��E -. ..r - - -.r / / I I �, PA LEVEL EARTHEN' /' / r� G&DED ACCESS TO SWM -- T - FACILITY w/ SLOPES C109 pR PE lITY CONTRACTOR, SHALL ENSURE r 1 `1 PINS A HEALTHY\ GRASS LINED I 1 - / CHANNEL BETWEEN THE l D' TOP OF D9M� - 7 , PIPE OUTLET AND THE ELEVATION -43 \ ti /2 EXISTING DROP INLET. ' \ VDEC STD. CL_ l ....:. r t: - !. . . . . . . . . . ✓ . Y.. .4 `'. �, ",. SL ..^'. p . . . . . . . ......................... L .................. ...................... .......................... . . . . . . . . . . . . . . . . .... ........................... RTE 29 r (SOUTHBOUND) FIGURE 1,37 -1b E Iended d)►elfention Bayin - Section bdsting Ground Design Stoma Nom. Nuter Surface Elviotims Sedimraa4 F"gy w /rV ro 004" z gib,, WA Stages Riser F p% Lam Flag Channel ,�as neerled� Eattxacied NLe ntion Contml {atRJCture (® fl. 3.07) County o mar Conservation Flan Checklist- To be.:plaeed on Landscape Ptans (flundbaoly pp III - 284 -111 -297 for completespeciticaGunt) 1 The follow IngiteMs shaa �eshown on are plane. ® Greys to be saved; Carols of elaann$ (outside driptina of trees to b,<savadj � Locakignatrdlypau £,prutoctivs~,fzrrcaug, Grurie chatrgea rexluiiittg uaa tvella or walls;. � Propv~ Sad trvnclutrg, or twutaln6 beyvad th4litttits of cluutsig. 2, Q All treed to be saved shad be nr ul:ed with print er ribbsur at a height ckady visible to a luipmeut operators: Q No grading shall begin until the tray inarking lies been Inspected aid approved by a County Inspector.. J. FrwC otratrucUan Conference: &� Tree presarvauort artd prutecnart rneaaturx shall bc• reviewed wrtiitha r.attta -aciur art silo, 4. Egulnment Operation and Starage• % heavy etlaiprnentr vehkWar traffic and storage of construction nlatactalsritdtrdirag sail shall not W petnutted within late drip&ers of try to to savari. 5: S II E sWn and SCtirntsva[e' et noon D ices: ® Such davlces shall not adverse€y;aRecttree* to W saved. S. lures: Z1 Fires are not perntittW within:: tot} feat of the driplinaof trees to be saved: 7. Toxic Materials, � I avtc matutals shall net ba stored witlua 106 feet of ttta driptina of trees to ba sat�eJ. & .Pro eckly¢ ke_rygltrp U Trees to be retained within 40 feet of a proposed builiirirg or gradutg activity marl( be protected by fencing. EI Fend rig shad be in place and,shatl be inspected,will approved by a Comity Inspector prior to grading or construction, A. Tree \Vella: I ! When file ground level anutbe rnii ed within the driptina of a tree to be saty d, a trt a well shall be provided and a construction detail . subautted for approval. la: 'rree Walls tSI an tltq grourxllavel roust bu:lorvvmd uiltihr IFru driplino u trap to bu aavai, a tree \yell stw2l Ise prinvided; turd a'ccutshuctioii dehi€I submitted rvrapproval. 11, .1 er chine and Tuanaling: ZI wh rt t ndring is r quiced w i 1 n the limits of clean\ , it shalt be done as few': way front the tructl a 9f tt a tz& p sibla -Tut Tunneling under a larga tree shall be oonsidatred as an alternative when it is anticipated that adceemq trenching will d st roy<fa.der toots. 12. Cleanup: protective fencing shall be the laAitems removed during the fiord cleanup. 13.. Damaged frees: � Dnrna}led trees shalt tie tteatdilimnlediats<ly^ byprurriragi tertilirataa or other anekheds racununandeii:lay a tree;apeciirlist NOTF. IT 1S THE DEYELOVY11 "S KESI'ONSIBII.TIY TO CONFER Wtrll THE CONTRACTt)II ON'TKEli'CQN$ERYs1C1CtiY 4tPQU11iLr�ti;iy'rS. OWNER SIGNATURE (D,k'fE) CoNTRAcrPuRc1L1sickst N.t'ruim (DATE) 511M Page 1'of k 4 QOtREtUQtI-� PIMI Earthesle Etnbankment \136iclpaE `(}Tilt 0c tin Slt7tm Gaoled Reletwa Uriflce FIGURE 3.0 7 -1 a zxrerraea veirertrronr nasal - \Mari 114a4mtart Pordn " Extended Nter&tl Eaten Uet.UW r Etat�tion Yaluen Central Stnrcbn fl€ltl -gaga Riser ..-�` I •.. Siruetare Sedittuart fore4ay r = vlArmored +orsri'lare l t`r UN \tile Channel \Zilmmt rue k \ I Lendscapinq tixp3"� tear Store Staraga v a; n�ad cenlr r�I - r. 4 X11 Erosicrr Cant(ct) Nartonarro t3erw4 ford �riler t / Embard4nent � ue4et�ted �, i Errrer�ancl• ,,- SAM t ktccmrl Co Sadinnent toreay 9 rrre7vnre A, red Ovtirlkm � bufkstt P�et'�4dfen \3 -07-1a SWM FACILITY #3 PLANTING DETAIL- SCALE 1 " =30' 73 CA r 6 CC ` (5) PA -o O O ,, .t...,..z '''� it o 0 0 ♦��r d Q a Cc C y � � 0 ,u* w ����� � V � i� � erS � �, _ A •1J O� �l C SC T COLLINS U Lie. No. 035791 �SSIONAL E,,, O z M LU w w U) w > w Ce w QLL i 1�-4 r4 � ° o iz iz Go N Li r z Q LU u U V) m n O C U C ° cn © O V) � U o L z w Liu IJ a c Vn L z� a c E Ww u ce > w u tY C O z M LU w w U) w > w Ce w QLL i 1�-4 r4 � ° o iz iz Go LEGEND ROADS 0 TABLE 3.31 -A LIMING REQUIREMENTS FOR TEMPORARY SITES Recomrxrelt&4 Application pH Test gf Agdcultund Limestone below 4,2 3 tarts per acre 4.2 to 5.2 2 tons per acre 5.2 to 6 I ton per acre THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING EROSION & SEDIMENT CONTROL SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT - TRAPPING FACILITY SUCH EFFEC77VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED . < ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). MEASURES: or clogging to structural measures is to be repair itrtrnediatefy. Silt traps tore to be cleaned 1. 11 PROFESSIONAL. AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE EXISTING CULVERT STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE EROSION CONTROL NOTES DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL NOTES & NARRATIVE CULVERT VIRGINIA CONTROL STRUCTURAL c,ontetenc,e arts week; prior to commencement of land disturbing a(.ttwtt and one week ' la y' 774E ESTABLISHMENT OF PERENNIAL VEGETATIVE COINER ON DISTURBED AREAS BY PLANTING SEED. ADDITION TO ENSURING THAT THE PAVED CONSTRUCTION ENTRANCE IS INSTALLED INSTALL ANY 5. IN A , RUNOFF TO DOWNSTREAM OR OFF -S /7E• AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS PRACTICES USED N THIS SECTION CONSIST OF THE FOLLOWING.- ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION CONTROL MEASURES: PURPOSE.' DROP INLET & STRUCTURE NO. S ON THE EROSION ON PL REMAINING EROSION CONTROL ITEM AS SHOWN R CONTROL AN. AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND EROSION AND SEDIMENT CONTROL MEASURES. THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO CONSTRUCT THE ROADS, DRAINAGE STRUCTURES, 2. 3.01 SAFETY FENCE: MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF IT IS ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, EXIS77NG SEDIMENT BASINS, UTILITIES & STORMWATER MANAGEMENT FACILITIES ASSOCIATED WITH THE BRIARWOOD COMMERCIAL SITE ROAD CURB A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL PLAN. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE OF DEVELOPMENT IS 10.38 ACRES. CURB &GUTTER APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED REGULAT70NS VR 625 -02 -00 EROSION AND SEDIMENT CONTROL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES TEMPORARY STOCKPILE EXISTING SITE CONDITIONS.' Handbook and Virginia Regulations Y.R. 625- 0'2 -00 Erosion and Sediment Control UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. REGULAT70NS. AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED THIS SITE CONSISTS OF A ROLLING GRASS FIELD WITH MODERATE VEGETATION, SLOPING DOWN TO THE EAST. PROPOSED PAVEMENT ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO AREAS NLL RECEIVE A PERMANENT VEGETATIVE COVER. THE SITE IS LOCATED TO THE WEST OF ROUTE 29 IN THE BRIARWOOD DEVELOPMENT AND DRAINS TO THE SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF 3.02 CONSTRUCTION ENTRANCE: THE PRE - CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE AND STORED FOR LATER SPREADING STOCKPILE LOCA770NS SHALL BE ON SITE AND SHALL BE NEARBY RIVANNA RIVER. EC -3A DITCH A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ADJACENT AREAS.• 4• VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF THE FINAL INSPECTION. ALL AREAS WHICH WILL No LONGER BE EXCAVATED AND WHERE CONSTRUCTION AC77W77ES HAVE THIS SITE IS BORDERED TO THE EAST BY ROUTE 29. TO THE SOU77 -1 AND NORTH EXISTS OPEN GRASS FIELDS DEPTH OF EC -3A DITCH MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BRIARWOOD SUBDIVION UNDER CONSTRUCTION EXISTS TO THE WEST. INSTALL WALLS SHOWN ON THE PHASE I EROSION CONTROL PLAN. INSTALL STORM SEWER ASSOCIATED W /7H CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON 774E PLANS TO REDUCE THE TO OR AS THE FIRST STEP IN CLEARING. BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE 77ME .friar EC -2 DITCH AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. ES -4 :A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL YEAR APPLIED. OFFSITE LAND DISTURBANCE.' OR VERY DEEP, WELL DRAINED SOILS ON GENTLY SLOPING TO VERY C CONTROL HANDBOOK. BE MAINTAINED ON THE St TE A T ALL TIMES. MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR NO OFFSITE LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF lP O 3.05 SILT FENCE.- ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN TE Y S DI TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT DISTURBANCE AS SHOWN. DEPTH OF EC -2 DITCH A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHE7C FILTER FABRIC STRETCHED INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED T0, OFF -SITE FOR MORE THAN SEVEN DAYS THESE AREAS SHALL BE SEEDED NTH FAST GERMINA77NG CRITICAL AREAS.- EARTH DITCH ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN BORROW OR WASTE AREAS 774E CONTRACTOR SHALL SUBMIT A VEGETA7ON IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS SELECTION OF SEED MIXTURE WILL THERE ARE NO CRITICAL AREAS LOCATED WITHIN THE PROJECT LIMITS SILT FENCE 3.05 SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERA7ONS IN SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND DEPEND ON THE TIME OF YEAR APPLIED. SOILS.' REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE ORDER TO PREVENT SEDIMENT FROM LEAVING 774E SITE, AND TO DECREASE 774E VELOCITY OF AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE E IS LESS ACRES WHERE THE N AREA THAN 3 DRIVEWAY CULVERT SHEET FLOWS AND LOW- T0- MODERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS APPROVAL BY THE PLAN APPROVING AUTHORITY. CONSTRUCTION ENTRANCE. SO /LS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS WITH SO /LS DATA INCLUDED WITH THIS SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF NARRATIVE. BENCH MARK LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD SEQUENCE OF CONSTRUCTION: TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENTA77ON AS DETERMINED BY THE PLAN APPROVING AUTHORITY. TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. 1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS TRUC7ON MEE77NG AS REQUIRED. CLEARING LIMITS SEDIMENT CONTROL HANDBOOK (VESCH). ES -7.• ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE 2. NO EROSION CONTROL MEASURES MAYBE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE CHECK DAM 3.20 A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWA TER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRA/NAGEWAY. MEASURES A T ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. APPROVAL FROM THE INSPECTOR ON THE PROJECT. VDOT STANDARD STOP SIGN 3.07 STORM DRAIN INLET PROTECTION. A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP SITE DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN SILT FENCE.- J. INSTALL THE PAVED CONSTRUCTION ENTRANCES WITH WASH AREAS AS SHOWN ON THE PLANS. oducin rainfall event. A necessar re airs r cleriuu to ma lain the effectiveness of pr g ny y p a P n INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS APPROVED WATER FILTERING DEVICE. A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS CONSTRUCTION ENTRANCES TO BE INSTALLED WHERE CONSTRUCT70N VEHICLE ROUTES INTERSECT PAVED EXIS77NG CONTOUR PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PROTECTION APPLIES ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL B D D MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) PUBLIC ROADS, PROVISIONS SHALL E MADE T H RT ENT (V !C LAB) WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA77ONAL BEFORE PERMANENT PERIODICALLY AND AFTER EACH RUNOFF - PRODUCING RAINFALL EVENT. AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, PROPOSED CONTOUR STABILIZA7ON OF THE CORRESPONDING DISTURBED DRAINAGE AREA. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS PREVENT SEDIMENT FROM LEAVING THE SITE: TO DECREASE THE VELOCITY OF SHEET FLOWS AND THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED It. 09 TEMPORARY DIVERSION DIKE. E. • OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. LOW -TO- MODERATE LEVEL CHANNEL FLOW S THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPOR77NG TO A SEDIMENT CONTROL DISPOSAL PROPOSED SPOT ELEVATION 3.18 PROTECT /ON: 12. materials only, free of roots, stumps, wood, rubbish, and other debris. , > Elorraw or waste areas are to be reclaimed within 7 days of completion per Zoning AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT !S REMOVED !N THIS MANNER. TBC DENOTES TOP /BACK OF CURB A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING SLOPE OF AREAS KITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS 4. INSTALL THE INITIAL CONSTRUCTION MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS TAB DENOTES TOP OF BOX / DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM. UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT A ! TLET. General. construction notes for Erosion and Sediment, Control lens P INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED /N INCLUDES SILT FENCE, DIVERS /ON DIKES, SEDIMENT TRAP &SED /MINT BAS /NS. MEASURES INTENDED TO TABLE 3.31 -A LIMING REQUIREMENTS FOR TEMPORARY SITES Recomrxrelt&4 Application pH Test gf Agdcultund Limestone below 4,2 3 tarts per acre 4.2 to 5.2 2 tons per acre 5.2 to 6 I ton per acre THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING 1ri. SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT - TRAPPING FACILITY SUCH EFFEC77VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED . < ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE AC77VITY AND or clogging to structural measures is to be repair itrtrnediatefy. Silt traps tore to be cleaned 1. 11 PROFESSIONAL. AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE 1. 'Ills lain approving authority must,be notified one week prior to the re- construction P PP Y P P PERMANENT STABILIZATION. SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. VIRGINIA EROSION &SED /MINT CONTROL EROSION CONTROL TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON 50- 100 c,ontetenc,e arts week; prior to commencement of land disturbing a(.ttwtt and one week ' la y' 774E ESTABLISHMENT OF PERENNIAL VEGETATIVE COINER ON DISTURBED AREAS BY PLANTING SEED. ADDITION TO ENSURING THAT THE PAVED CONSTRUCTION ENTRANCE IS INSTALLED INSTALL ANY 5. IN A , RUNOFF TO DOWNSTREAM OR OFF -S /7E• AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS HANDBOOK SPECIFICATION NUMBER SITE DURING CONSTRUCTION. 7HESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 THE INSTALLATION OF RIPRAP CHANNEL SEC77ONS AND /OR S77LLING BAS /NS BELOW STORM DRA /N c prior to the final inspection, REDUCE ON D SE SEDIMENT YIELD FROM DISTURBED ARE S TO PERMANENTLY TOR E EROS/ AN DECREASE A S ON THE EROSION ON PL REMAINING EROSION CONTROL ITEM AS SHOWN R CONTROL AN. 11 immediately, 'k MONTHS OR LESS, WHICH CAN BE PROLONGED KITH PROPER MAINTENANCE. 2. All erosion and sediment control measures will be. constructed and maintained according to STABILIZE DISTURBED AREAS IN A MANNER THAT /S ECONOMICAL, ADAPTABLE TO S17E CONDITIONS, 6. ONCE ALL THE EROS /ON CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN a STRAW BAIL BARRIER 3.04 3.12 DIVERSION: 1. final site stabilization, when.meastun are no longer needed, subject to approval by the. 1. r►ainimum standards antis c ifzuations of the Vir Virginia erosion and Sediment Control g AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MA TO IMPROVE WILDLIFE AND 7HE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN County erosion control inspector. 11 A CHANNEL CONSTRUCTED ACROSS A SLOPE Wl7H A SUPPORTING EARTHEN RIDGE ON THE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. Handbook and Virginia Regulations Y.R. 625- 0'2 -00 Erosion and Sediment Control HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL GRADING OPERATIONS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. DD DV TEMPORARY DIVERSION DIKE 3.09 LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWATER Regulations, AREAS NLL RECEIVE A PERMANENT VEGETATIVE COVER. SHOWN ON THE PHASE / EROSION 7. ROUGH GRADE THE SITE TO THE CONTOURS E ROS CONTROL PLAN. SEDIMENT SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF 2; .. RUNOFF TO STABILIZED OUTLETS AT NON - EROSIVE VELOCITIES APPLIES WHERE RUNOFF FROM 3, All erosion and sediment control measures are to be placed prior to or as the first step in TEMPORARY SEEDING BASIN 1 SHALL REMAIN IN PLACE TO ACCOMMODATE DRAINAGE UNTIL ALL UPSLOPE AREAS HAVE BEEN ST >��°. %♦ O TEMPORARY SEDIMENT TRAP 3.13 AREAS OF HIGHER ELEVATION MAY DAMAGE PROPERTY, CAUSE EROSION, OR INTERFERE W17H THE ESTABLISHMENT OF VEGETATION ON LOWER AREAS, WHERE SURFACE AND /OR SHALLOW 4• clearing. A co of the approved erosion and sediment control plan shall be maintained on the site at copy p THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WI7N STABILIZED AND THE BRIARWOOD DRIVE EXPANSION AND ELM TREE COURT CONSTRUCTION ARE COMPLETE. EFFECTIVE ON SANDY SOILS. THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION 3.35 MULCHING, SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENG774 NEEDS TO FOREST TO URBAN -TYPE USES APPLIES IN 7REE- INHABITED AREAS SUBJECT TO LAND A all rim. APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND SEDIMENTA77ON BY INSTALL WALLS SHOWN ON THE PHASE I EROSION CONTROL PLAN. INSTALL STORM SEWER ASSOCIATED W /7H SB � SEDIMENT BASIN 3.14 BE REDUCED TO MINIMIZE SOIL LOSS. .friar to catttmencing land disturbing activities ,,%n areas; other than indicated these plans STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF THE BRIARWOOD DRIVE EXPANSION, USING INTERMEDIATE INLET PROTECTION TO PROTECT THE END OF THE PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER DRILL OR VERY DEEP, WELL DRAINED SOILS ON GENTLY SLOPING TO VERY C CONTROL HANDBOOK. ,on (including, not limited to, off -site borrow or waste areas }, the contractor shall submit a S MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR PIPES INSTALL INLETS AND INSTALL INLET PROTECTION AS SHOWN ON THE PLANS lP O INLET PROTECTION 3.07 3.13 TEMPORARY SEDIMENT TRAP. A TEMPORARY POND /NG AREA FORMED BY CONSTRUC77NG AN EARTHEN EMBANKMENT WITH A MOUNTAINS. RUNOFF IS MUCH LOWER ON THESE SOILS WHERE FOREST supplementary erosion control to the owner for review and approval by the plan ' _ OFF -SITE AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUC7ON UNTIL PERMANENT VEGETA770N OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. & PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS W/TH /N SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG approving authority. SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL SF O SILT FENCE 3.05 ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT To SETTLE OUT. USE BELOW DISTURBED 6. 'Che contractor is responsible for installation of any additional erosion control measures DUST CONTROL: REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE E IS LESS ACRES WHERE THE N AREA THAN 3 necessary to prevent erosion and sedimentation as dete rrained by the plan approving REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED authority, CONSTRUCTION ACTIVITIES CE O CONSTRUCTION ENTRANCE 3.02 EITHER INDEPENDENTLY OR IN CONJUNCT70N WITH A TEMPORARY DIVERSION DIKE. 7. All disturbed areas are to dtatn to approved sediment control measures at all Limes during land disturbing outing development until final is TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE 9. ONCE ALL GRADING OPERATIONS ASSOCIATED WITH THE PHASE l ESC PLAN HAVE BEEN COMPLETED, SEDIMENT TRAP 3 SHALL BE INSTALLED AND THE CONSTRUCTION OF UNDERGROUND DETENTION FACILITY 1 # # 3.14 TEMPORARY SEDIMENT easlN: activities and site stabilization achieved, THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY CAN BE COMPLETED. SEDIMENT TRAP #3 MUST BE INSTALLED BEFORE THE REMOVAL of SEDIMENT BASIN #1. ' CD O CHECK DAM 3.20 A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWA TER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRA/NAGEWAY. 8• t J• During, dewatecing operations, water will be pumped into an approved filtering device: The contractor' shall inspect all erosion control measures periodically turd after each runoff- PROBLEMS OR HARM AN /MIL OR PLANT LIFE. MOVEMENT INSTALL SMALL SEDIMENT TRAP FOR WASH RACK BEFORE THE REMOVAL OF SEDIMENT BASIN #1. GRADE OUT THE „ „ TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET AND 'DRY" STORAGE oducin rainfall event. A necessar re airs r cleriuu to ma lain the effectiveness of pr g ny y p a P n 0 UST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH 774E VESCH. ROADS AS SHOWN ON THE PHASE l O THE REMAINDER OF SITE AND GRADE THE P ! EROSION CONTROL PLAN. 10. FINE GRADE, INSTALL CURB &GUTTER AND SEED AND FERTILIZED 774E DENUDED AREAS FD O TEMPORARY FILL DIVERSION 3.10 LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBU77NG DRAINAGE AREA IS EQUAL TO OR 10. the erosion control devices shall be made immediately. All fill mated to be taken frt nt an approved, ' deli hated borrow area: TEMPORARY DIVERSION DIKE. 11. INSTALL STONE BASE AND PAVE PARKING LOTS AND ROADS HAS APPROVAL, THE GREATER THAN THREE ACRES 7NER UST B S T S PPROPRIATE E M E UFFICIEN PACE AND A g A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA 12. ONCE THE SITE l5 STABILIZED AND THE INSPECTOR GIVEN CONTRACTOR CAN REMOVE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. It. n All waste materials shall betaken to an approved waste area. earth fill shall be inert : WHICH DIVERTS OFF -SITE RUNOFF AWAY FROM UNPROTECTED SLOPES AND TO A STABILIZED OUTLET, THE EROSION CONTROL MEASURES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE DV O DIVERSION 3.12 3.18 PROTECT /ON: 12. materials only, free of roots, stumps, wood, rubbish, and other debris. , > Elorraw or waste areas are to be reclaimed within 7 days of completion per Zoning OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM STABILIZED AND THE INSPECTOR GIVES PERM /SS /ON. 12. MAINTAIN ALL EROS /ON CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROS /ON AND SEDIMENT OUTLET STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED t3rdin�ittce section 5.1.2$. 1. EFFEC77VE LIVE IS 18 MONTHS CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT 13:`.`. All inert materials shall be trans orted in compliance with section 13 -301 of the Code of P p ROCK CHECK DAMS: ACCORDANCE WITH 774E VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. PS PS O PERMANENT SEEDING J. STORMWATER OUTLETS, TO PROTECT' THE OUTLET STRUCTURE, AND TO MINIMIZE THE POTENTIAL Albemarle. SMALL, TEMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE 13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED 14. w. liarraw, till or paste. activity utdustral- typepa�ver egttiptnept shall be limited to 11 C EROSION O S H. LIMI 0 USE VELOCITY OF CONCENTRATED FLOWS, REDUCING E F THE WALE OR DITCH. TED T FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS /NG 3.30 STORMWATER FLOWS APPLICABLE A0 THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL the hours of 7:00ant to 9:00pm. /N .SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS; SHOULD NOT BE USED IN LIVE OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED TO TO TOPSOIL SECTIONS. 15. Borrow, fill or waste activity shall be conducted in a safe manner than maintain's lateral 11 STREAMS. SOIL AREAS RESULTING FROM ,THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY 3.19 RIPRAP: • d support, or order to minimize arty haxar to persons, physical datrtage to adjacent land and STORM DRAIN INLET PROTECTION: HER EROSION AND SEDIMENTATION. STABILIZED TO PREVENT FLIRT A 77 e CULVERT INLET PROTECTION 3.08 A PERMANENT, EROSION- RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH improvethents, and damage to any public street because o slides, sinking, or collapse. THE INSTALLA770N OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP fNLETS OR FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE EROSIVE 16, lbe- developer shall tOerve.the.right tc install, rttaintttin�, rerttcive or convert to permanent CURB INLET STRUCTURES PR /OR TO PERMANENT STAB ILIZATION OF THE DISTURBED AREA; LIMITED TO FORCES OF CONCENTRATED RUNOFF, SLOW 711E VELOCITY OF CONCENTRATED RUNOFF WHILE stormwater management facilities wttera applicable all;erosioncantral measures requited pRA /NAGS AREAS NOT EXCEEDING ONE ACRE AND NOT INTENDED TO CONTROL LARGE R L TEMPORARY SEEDING.' DC DC O DUST CONTROL 3.39 ENHANCING THE POTENTIAL FOR INFILTRATION, AND TO STABILIZE SLOPES Wl7H SEEPAGE PROBLEMS, AND /OR NON - COHESIVE SOILS USE WHEREVER SOIL AND WATER INTERFACE AND 17. by this'plan regardless of the sale of at y (at, unit, buil(ling or outer partiaut of the property., "Pempc racy stabilization shall be temporary seeding and matching. Seeding I . be at; 15 , CONCENTRATED STORMWATER FLOWS ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETA7VE COVER, ETC., lbs /acre and in the months of September er to February to consist a 50150 [Aix of. Annual TEMPORARY SEDIMENT TRAP: TIME SHALL BE, SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION TSD --- O TEMPORARY SLOPE DRAIN 3.15 ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS Rye miss and Cereal Winter 1t epctr iii 1Vlarch: and A ril to consist of Anntuai R e or May 11 A .SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED /MMEiD /ATEL Y FOLLOW /TUG GRAD /TUG. SELECTION OF THE SEED MIXTURE WILL 3.20 ROCK CHECK DAMS. thtyotglol% Au ust to consist of ertman NUllet. Straw mulch is do be applied at $Olbs /1t} sf g DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THA T SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. TO > Alternatives are subject to approved try, the County erosion control inspector. AREAS FOR ENOUGH TIME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS SA O SAFETY FENCE 3.01 REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROS /ON 18. Permanent stabilization shall be lima and fertilizer, peimanent'seeding and mulch. EFFECTIVE LIFE /S 18 MONTHS. PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE OF THE SWALE OR DITCH. THIS PRACTICE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT Agricultural grade limestone shall be applied tit 90lbs/100osf, incorporated into the top 4 -6 TEMPORARY SEDIMENT BASIN: CONDITIONS FROM TABLES 3.31 B AND 3 31 C. NOTE THAT TABLE 3.31 B PRESENTS E DITCH ITSELF MAINLY B ONDING OF S O AREAS OR THE Y P THE T RMWAIER RUNOFF. THIS inches of saiL:ertilizer shall be applied at 1{{3lJ0Ebsfacre and consist of a:10-20-10 nutrient A TEMPORARY BARRIER OR DAM W17N CONTROLLED STORMWATER RELEASE STRUCTURES WHICH IS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE RW TEMPORARY RIGHT-OF-WAY 3.11 PRACTICE U71LlZlNG A COMBINATION OF STONE SIZES, !S LIMITED ro USE !N SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS. mix. Permanent seeding shall be agpl eci at 18tilbs /acre and consist at .... °fo Kentucky r 1 or FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. /T /S CONDITIONS, TABLE 3.31C PRESENTS MORE IN -DEPTH INFORMATION ON THE DIVERSION fall Fescue and 0 -5a'o Ferennial Ryegrass or Kentucky Bluegrass. Straw .ntulchis to be USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER FOR PLANT MATERIALS applied at 80lbs /100sf. Alternatives are subject to approved by the County erosion control ENOUGH TIME TO ALLOW MOST OF THE SUSPENDED SO LIDS TO SETTLE OUT. IT CAN BE 3 31 TEMPORARY SEEDING inspector. CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY MAXIMUM TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO TABLE 3.31 -A LIMING REQUIREMENTS FOR TEMPORARY SITES Recomrxrelt&4 Application pH Test gf Agdcultund Limestone below 4,2 3 tarts per acre 4.2 to 5.2 2 tons per acre 5.2 to 6 I ton per acre THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING 1ri. 11'taintenance: All measures are to be,inspected weekly and after each taint: il-Any damage 111. EFFEC77VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED GERM/h TE AND GROW. SEEDBED PREPARATION IS ESSENTIAL. W/7H APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND Rate or clogging to structural measures is to be repair itrtrnediatefy. Silt traps tore to be cleaned 1. 11 PROFESSIONAL. AN EVALUATION SHOULD BE CONDUCTED TO DETERM /NE /F LIME /S NECESSARY SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL Annual Ryegrass when SOrr"r, of tie wet storage volume is filled with sediment. All seeded Areas are to tie g OUTLET PROTECTION: FOR TEMPORARY SEEDING. TABLE 3.31 A MAY BE USED TO DETERMINE THE GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND 50- 100 0 reseeded when necessary to achieve a,- stand of glass. Silt fence and diversion dykes TOPSOIL - 2" DEPTH LIME - 2 TONS /ACRE S . (Seale cereals) RUNOFF TO DOWNSTREAM OR OFF -S /7E• AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS Feb. 16 - Apr. 30 Annual Ryegrass 1. which, its cojjectin sediment to half ltieir her ht musf be cleaned and: re Paired g P THE INSTALLATION OF RIPRAP CHANNEL SEC77ONS AND /OR S77LLING BAS /NS BELOW STORM DRA /N ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RA TES' EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETATION OR OTHER EROSION CONTROL 50 11 immediately, OUTLETS TO REDUCE EROSION D UNDE - UTTNG FROM SCOURING OU TS AND TO REDUCE AN R C AT OUTLETS RUNOFF AND MEDIUM INTERNAL DRAINAGE. MOST OF THESE SOILS MEASURES C AN BE ESTABLISHED. 20.> All tetti anal :erosion al.d sediment control measures are to be rerno d with ti.34 days of FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS. - FERTILIZER SHALL BE APPLIED AS 600 LBS /ACRE OF 10-20-10 (14 LBS /1, 000 3.32 PERMANENT STABILIZATION. 11 1. final site stabilization, when.meastun are no longer needed, subject to approval by the. 1. CUL INERT INLET PROTECTION: SQ. FT.) OR EQUIVALENT NUTRIENTS LIME AND FERTILIZER SHALL BE THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLAN77NG : County erosion control inspector. 11 A SED /MENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS SED /MENT INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO ' 21, this plan shall.be void if the owner does not obtain a ` rmit within 1 yearr of the date,of l?. l FROM ENTERING, ACCUMULA77NG IN AND BEING TRANSFERRED BY THE CULVERT. IT ALSO PROVIDES IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO approval. (Water Protection Ordinance section 17 -20 E.G.} 11.1 EROSION CONTROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEVA770NS AND ER C R ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF 2; .. . Permanent e etation hall be`installed on all 'denuded areas: ithin nine '9 ,.m nths sifter 11 v (T Q 1. the date the land disturbing activity wrantenced. (Water Protection Elydin,ance section `17- DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES TO BE INEFFECTIVE. HARDENED THE SOIL SHALL BE LOOSENED BY DISCING RAKING HARROWING OR CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA71VE COVER. MODERATELY HIGH TO HIGH IN THE SUBSTRATUM. RUNOFF RANGES I 24713r SAFETY FENCE, OTHER ACCEPTABLE MEANS. TRACKING WITH BULLDOZER CLEATS IS MOST FROM LOW TO VERY HIGH DEPENDING ON SLOPE. C I A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL EFFECTIVE ON SANDY SOILS. THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION 3.35 MULCHING, FOREST TO URBAN -TYPE USES APPLIES IN 7REE- INHABITED AREAS SUBJECT TO LAND A MEASURE. OF THE SOIL SURFACE, ESPECIALLY IN CLAYEY SOILS, AND DOES NOT AID APPLICA77ON OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO PREVENT EROSION BY PROTEC77NG THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING SOIL DESCRIPTION PERMANENT STABILIZAT10I11' PLANT GROWTH' AS EFFECTIVELY AS OTHER METHODS OF SURFACE ROUGHENING. THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VEGETA7ON BY INCREASING HAYESVILLE LOAM - 77 TO 157 SLOPES HAYESVILLE SERIES CONSISTS M MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION &SEDIMENT PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER DRILL AVAILABLE MOIS77JRE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS 14D - CHESTER LOAM - 157 TO 257 SLOPES. THIS SOIL SERIES CONSISTS OF CUL MPACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO Sauces. Va. l=hSWC PER THE PERMANENT STABILIZATION OF THIS EROSION &SEDIMENT WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IMMEDIATELY FOLLOWING VERY DEEP, WELL - DRAINED SOILS ON UPLANDS RUNOFF IS MINIMUM & N CONTROL NARRATIVE MORE THAN 14 INCHES DEEP SMALL SEEDS SUCH AS KENTUCKY BLUEGRASS TABLE 3.31.11 SATURATED HYDRAULIC CONDUCTIVITY IS MODERATELY HIGH TO HIGH. ' ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR, ALL REGIONS' CHESTER SOILS ARE USUALLY FOUND ON UPLAND DIVIDES AND UPPER A Rate Planting Dates Species lbs, acre Sept. 1 - Feb. 15 50150 Mix of SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT L Annual Ryegrass THEMSELVES, CAN BE USED IN CONJUNCTION NTH TEMPORARY SEEDING. S (Loliurn multi- florum) STANDARDS THIS SHALL CONSIST OF THE FOLLOWING; & 50- 100 Cereal (Winter) -Rye TOPSOIL - 2" DEPTH LIME - 2 TONS /ACRE S . (Seale cereals) STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA7VE COVER WITH TREES, SHRUBS, 19B - C Feb. 16 - Apr. 30 Annual Ryegrass 60-100 u t"- o VINES OR GROUND COVERS. TO AID AB OVER R C R IN STABILIZING SOIL IN AREAS WHERE VEGETATION R M May 1 - Aug 31 German Millet 50 ("Set is ' al_io) THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE S SEEDING AREAS WHICH CA NOT BE SEEDED BECAUSE OF 174E SEASON SHOULD BE MULCHED S SATURATED HYDRAULIC CONDUCTIVITY IS MODERATELY HIGH TO HIGH. ' DISTURBED A ' CHESTER SOILS ARE USUALLY FOUND ON UPLAND DIVIDES AND UPPER A AFTER CONSTRUCT /ON IS COMPLETED, ALL D SHOUfLD B OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZA7ON BY S SLOPES IN THE NORTHERN PIEDMONT PLATEAU. S SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT L LEGUMES SHOULD BE PLANTED FROM INCH TO DEEP. THEMSELVES, CAN BE USED IN CONJUNCTION NTH TEMPORARY SEEDING. S STANDARDS THIS SHALL CONSIST OF THE FOLLOWING; 3.37 TREES SHRUBS VINES & GROUND COVERS. T TOPSOIL - 2" DEPTH LIME - 2 TONS /ACRE S SEED'/NGS MADE /N FALL FOR WINTER COVER AND DURING HOT AND DRY STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA7VE COVER WITH TREES, SHRUBS, 19B - C CULLEN LOAM - 27 TO 77 SLOPES THESE SOILS ARE VERY DEEP & F FERTILIZERS - 600 LBS /ACRE OF 15 -30 -15 S SUMMER MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. VINES OR GROUND COVERS. TO AID AB OVER R C R IN STABILIZING SOIL IN AREAS WHERE VEGETATION R M WE'LL - DRAINED W177 -1 MODERATE PERMEABILITY. MEDIUM TO RAPID 3 MUL THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE S RUNOFF AND MEDIUM INTERNAL DRAINAGE. MOST OF THESE SOILS SEED - ERNST 5311 CONSERVATION SEED M1X - ERNMX -114 (45 A ADEQUATE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON R ARE UNDER CULTIVATION WITH THE REMAINDER IN THE FOREST. L LBS /ACRE PENNLAWN CREEPING RED FESCUE, 375 LBS /ACRE ARGILS A AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT STEEP OR ROCKY SLOPES WHERE MOWING IS NOT FEASIBLE, WHERE ORNAMENTALS ARE A KENTUCKY BLUEGRASS, 37.5 LBS /ACRE PARK KENTUCKY BLUEGRASS, 15 R RILL EROSION WILL BE RE- SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED. SOIL CONSERVi4770N, OR TO ESTABLISH WILDLIFE HABITAT. L LBS /ACRE ANNUAL RYEGRASS & 15 LBS /ACRE PLEASURE PERENNIAL 34D - G GLENELG LOAM - 157 TO 257 SLOPES. THE GLENELG SERIES CONSISTS A AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND 3.38 TREE PRESERVA770N AND PROTECTION. 3 VERY DEEP, WELL DRAINED SOILS FORMED ON THE U)PLANDS OF M MAINTAINED ON A REGULAR BASIS PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND T THE BLUE RIDGE AND THE NORTHERN PIEDMONT. FINE -LOAMY AND DISTURBING AND CONSTRUCTION AC77WTY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES M MIXED, SATURATED CONDUC77WTY IS HIGH IN THE SUBSOIL AND M MAINTENANCE.' WHERE THEY WILL BE EFFEC7IVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED M MODERATELY HIGH TO HIGH IN THE SUBSTRATUM. RUNOFF RANGES I IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE PROTECTON, LANDSCAPE BEAURFICAI710N, DUST AND POLLU77ON CONTROL, NOISE REDUCTION, F FROM LOW TO VERY HIGH DEPENDING ON SLOPE. C CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN 7REE- INHABITED AREAS SUBJECT TO LAND A ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS.' DISTURBING AC77Vl77ES A A. SEDIMENT BASINS AND /OR TRAPS WILL BE CLEANED AND 36C - H HAYESVILLE LOAM - 77 TO 157 SLOPES HAYESVILLE SERIES CONSISTS M MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION &SEDIMENT 3.39 DUST CON7ROL: O OR VERY DEEP, WELL DRAINED SOILS ON GENTLY SLOPING TO VERY C CONTROL HANDBOOK. REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND S STEEP RIDGES AND SIDE SLOPES OF THE SOUTHERN APPALACHIAN B CONSTRUCTION ACRWTIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM M MOUNTAINS. RUNOFF IS MUCH LOWER ON THESE SOILS WHERE FOREST B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR EXPOSED SOIL SURFACES AND RED"ICE T CE OF AIRBORNE SUBSTANCES WHICH MAY LITTER HAS LITTLE OR NO DISTURBANCE. SEDIMENT BUILDUP THAT WILL PREVENT P PER DR NA E. IF Source: Va, DSWC PRESENT HEAL 7H HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF CLEANED, OR IT WILL BE REPLACED. DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE 88 - UDORTHENTS LOAMY -77 TO 157 SLOPES. WELL DRAINED SOIL LOCATED C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR VESCH. IN AREAS DISTURBED DURING EXCAVATION AND GRADING ACTIVITIES. THESE SOILS ARE OFTEN ASSOCIATED BORROWED SOIL FROM OFF -SITE UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS QUARRYING OPERATIONS AND ARE HIGHLY VARIABLY IN REGARDS TO REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT WATER TABLE, PERMEABILITY, AND RUNOFF. DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THA T A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. oP� �SCO`� R. LLINS'� U Lic. No. 035791,E kS NAL O E�C�� 'IT It N Ln N ,A o 0 LU Lu Q Q 0 0 Z P U) O LU LU ? U U O 0 z ¢ O O O 0 Z U U Z U) � a CL to to > 5g W W o0 a, � � � 13� � w w 1 to Z w E O U r Z) O U LU J t1' Q LU ca J tY LU a- 0 LU V) > LU ce ,-1 .1 ,-, ,-� t 'I. �t w ­1 -1 1 N M n n � � r ::: or J J 0 U CF) lqr- M vi N V' d` 1 0 N N LIE. J LU 0 Q 0 I V LU �_ D U) UJ fy_ U) UJ 0. '< V O (N • • I I 9 I L C N- F-4 a v a 9 L c Q zCC J c C C 2j L GJ_ Q 0 °' c U 3 .0 Q U LLJ 6 M O L 1_4 a: 0 W a C t6> 0 Zc 0 OD cD F-4 z Ld w 0 w z Z z LU w V) Z J J O U 0 L ❑ 0 L ❑ Q) > U X Q) (1) L J U I- a) � F- ­1 E LU n a V) -°o JOB NO. a 122076 .o V) I In SCALE 0 N/A M SHEET NO. 1 o 5 F1_1 a S F- to to > 5g W W o0 a, � � � 13� � w w 1 to Z w E O U r Z) O U LU J t1' Q LU ca J tY LU a- 0 LU V) > LU ce ,-1 .1 ,-, ,-� t 'I. �t w ­1 -1 1 N M n n � � r ::: or J J 0 U CF) lqr- M vi N V' d` 1 0 N N LIE. J LU 0 Q 0 I V LU �_ D U) UJ fy_ U) UJ 0. '< V O (N • • I I 9 I L C N- F-4 a v a 9 L c Q zCC J c C C 2j L GJ_ Q 0 °' c U 3 .0 Q U LLJ 6 M O L 1_4 a: 0 W a C t6> 0 Zc 0 OD cD F-4 z Ld w 0 w z Z z LU w V) Z J J O U 0 L ❑ 0 L ❑ Q) > U X Q) (1) L J U I- a) � F- ­1 E LU n a V) -°o JOB NO. a 122076 .o V) I In SCALE 0 N/A M SHEET NO. 1 o 5 F1_1 a S F- 5 F1_1 a S F- -1 -_ --- -_ - ,__, _ _ __ _ - - � -- / \ // 7RENCH UPSLOPE ALONG THE LINE THE WRE FENCE AND EXTEND EXCA VA 7ED SOIL. TABLE 3.32-D QONSTRUQTIQN I \ -,- '_ , ­_ z \ � OF POSTS. IT INTO 7HE TTENCH. . SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA ACCES /­�,' 5M,'-2A ASPHALT TOP ___ ___� i i\� _� -- -- - — - . �,_, ,/ \ , � � ;" I I 11� — , __� 11 ­��_ — - __ __`��, ­,�__ --- - __ --- ­_ — 'N \ I � < / / / TO STAKES OR POSTS &- Total Lbs. -:,I _Jl� -, I ,- - / . . �7_1_,;7 Y_.­L � PA11`EME`NT _k___1 0 1-1 — — I j I I \ / I I -_ __1 I - I - Commerclat or Residential 175-200 tbs. / z ,;, __ - ,( ,_ _�> C I--- __ . _,� ;� - Kentucky 31 or Turf-Type Tall Fescue 95-IOOVD 11�� IC t _�_ )-si& _�> ) / , , __ (___ -, � I I !F I / / / / . 1-1 _ .... . _,- - — .— .- __ __ _ .. . .. ... -, — __ - r " / 0 A // \ FLOW I � ''I - COMPACTED General Slope (1 1 or less) 2r. I :P;�'IEME 1171 z _', - -, _ . , \ III -111-11 __ __ - 2% 12' MIN,+ . / I I - .... I / / ,4__-_,, -L� , _,*� - "I � 4 EXTENSION OF FABRIC AND WRE INTO 7HE 7RENCH. - [�� Im wilmuff 0 "_� '1� .-- r- __ - / I I & (WITH WIRE SUPPORT) 150 tbs. ,---POSITIVE DRAINAGE 10� ", /I AND �:��� 11 I" E A - - / / / / , r - � i-- _-r_ k=_ . �MUGT EgEND, FUI,L WIDTH LU / / / / - 1_� __,(___�: — ___, _\__ _-, / I I NO SCALE SILT FENCE (�� I.Dw-Maintenanco Slope (Steeper than 3: 1) Q� INGRESS AND'EGRESS I i FRAPP ING DEVICE > / // / ____ 2"x4" WOODEN FRAME 0 NO SCALE . . Kentucky 31 Fescue 108 tbs. I I -i ­i 0 / - DROP INLET . Seasonal Nurse Crop ' 20 tbs. r*4 -1 Q - / — �_J� - -- - ­ - . �z . 150 tbs. 1 —112' MIN. m P0511-11VE DRA(NAGE , / / - / / / 1-1 N___:::�____ - i - - _ — 1, I Compacted Soil TO SEDIMENT W LU LLI Uj I/ �,��, r[4�( , — . , -1 FRAME I[ I 27, f_ LJJ 2: / / I/ I _�/ I __ _ -- -_ - _, I ' Use seasonal nurse crop in accordance with seeding dates as stated below: I . . - !� 1­1 1 / - , I / ,- --- -k:�---:,T----, -�, _ .- -.-,- -1 ", _L _1_\ � ,-- — .__....__M —Flow May Ist through August 15th ..................... Foxtail Millet 'FILTEk CLUTfi 11 z U) U) Z U \ z �? I/ . `­1 __j z z .,;r �: / / / \ __ - J' MIN. -____7 through September use hulled Sericea, all other periods, use unhutled Sericea). -ugga -%,K,1�11 - I - I I -, 2: 0 0 U \ � / -) - 4.5' min. If Flatpea is used in lieu of Crownvttch, increase rate to 30 lb&/acrc, All Icgume .1111toff-valve 8 1pplyn . LU ::3 U r<, Uj I / I I Willi I Will I 110iiiii I Willi I Willi I —011il I 10-11111 I 101111 I 10 ** Substitute Sericea lespedeza for Crownvetch east of Farmville, Va. (May A inininaiiii water �tap of I uiclfunast be iii0alled Willi a mininaunia I incli,balleack U) ;/ / \ / / ____ SOURCE: VA. DSWC �_ __� PLATE 3.09-1 seed must be properly inoculated. Weeping Lovegrass may be added to any sto e 1 , .t.,�,O�.c,,iiiiettawlav,frotntliet�iff ice(oaq GA 7HER or low-niaintenance mix during warmer seeding periods; add 10-20 tbs./acre In I '. I I . I / / I . / / / EXCESS TEMPORARY DIVERSION DIKE mixes. I . .. I - � I I / v V-1 , � V) 0� a- 11a. 0 LU \ I � / / — � , - I - � 6" - � z , -� / v \ / __ __- � / / ��1~�� � DRIVE / �y��� '- -- � . / _ -_�~ L--- � \ \ � / / < / (7��` �����/R) `` ____-- ' �� ~- a— > LU a� R/S�7CR��7fIEW\�O� `` //'' 00N . � ` ~` , 4 z �� 0 - � `� > �| rn POSTS MIN S2E 4" SQUARE _' - \\ � �^ / '`` -- / ' ` / --``- ' //' / /c �� | | / - - ROUND. SET � \ -- 07 � ' ` \ ' H L V) ` \ ' '/ \ / ] ' _zI _ U `\ \ � '^ ' / / �c�mc»T BASIN �� rr�c D�T�- K �- `- \` ____ � � \ __ ___ | | | U nu ��n�c _- — -- _-_- _- --_^ �---' �^ NT FABRIC ORIE ATION 'J, / ' �� \ ``\ \ / / \ \ \ ' �8T / \ \�v /, ' Rp DROP INLET PROTECTION (ED - SILT / /-'"u^- ' - \ ~J\ \ � -- '- // \ \ \ � ' ' \ II \ , � \ \ I 1, ­ - ___ — / —_ \ \ \ / /, / / v / / // \ � \ , — I'\— — I -, — - __1 / --",— , T--'� - — vt -I--- -Z:7 -',? . _ _ I e� I--- \ / 11 �\ I ___ _ - __ — / 0 - —_ , I A 11 #-%,-v-1 5 ­ _... - '_1 \\\ \ 7 \ -_ �\ ? ... -, \ 1_ \ \I I __ __ _�_ - ___ 76 / , /AR. =,____1 N \" \ \ , .... - _ //, - ',� , V/ � / ­/, 11,/ , // / // L9 9r" 1 \ I - _N 4011=- 1�_ I / .. \\ \ /__ / III / /,// /Z // i \ / \ \ 11 - "I 11 . I / �/ 1//,� / z . � � I Ko I I L LA�� I -1 z,,,z,zz ,- / / V__), ' LIMITS OF DISTURBANCE ­ - I /I I \ I \ \\ / 'Z 1-1 " /I a N I - __ --- - - -_ -_ - ____ - , _�` !1_,___ - - -_ - "I 1% - , _ _, ,_ , _ ,-, ,_ ", - 7 -,-- 11 3: CL I \ - - _ - __1 - - ;1 _;,_ __ ..-.- - - __ N \ * I/ 0 - IN. -A / I - '_ .", , W - I - - _ ----- - 7--/ , 1 4% an am , VED CONSTRUC I ION __-7 /1,11" . ,/ , - - - I)IIIII, __ - /� __;�- - --- __ __ -, - I , I - . __ __ -.11 - - ­_ ___ - , =,�6o.�, __� I 1_� , \1 I - I- -1 Z_- W * -1 — _____ ____ — Y" - - __ - 1r , - _:z/:__::_:1 , , , -, \.--- _.- - - I -'\ \ ­`_- - 7 _;7- \ \ I . / - -7- — — >� — q z > 0� - - U A ''_ - __ - I- - ' __ ,- --- - _ _ \ \ I __ ��� Cw .45 X, I I / / /// / / Ix \ � / ,,, I - , __ ; �y *f__ _ _ __ - __ _ - __ " -_ ,/ / / STAGIN(.-:IiAKtA � \ 'X',\ \ 1'1' _.'_ I -, 1, , 1 20 z ' SILT FENCE WITH VVIRE \ \ \ \ IS." / / / / / I r� \ 0 II,,..,,,,,,,,,,,,,,,,II z - - __ - __ - , _ I __ __ , I � � - -1 - __ , /' , , , BACKING & SILT FENCE \ \ \ N \ / / / / / / -/"'A, / ////// / ��Wo � _ __ , - - � 442 , \\ -, -- --- =_` 4 ,/ / SF - \ \ _11.1-1.1 _­ If / / \ L9 I / __ __ - - 771 - - _ , / I , \ \ I I , r ( � � ( ( I k 0� U 0 - - I )--Ix ,/ -1 ___ , - ____\ \ \ \ "\\,,, , I,-, , - � / , I/ X \ -.13 \1 , / // J , / / / //// / \ Z < Ce U -/ . :_ kt_ B / , . __ \ \ \!,��, . t t.... ::�- - ��- - -- --- __ I / I ,7 II I,, k x / �/ _ - ..... ,:.�,­.­.... j 7,�_--, \ # .- � � LLJ �- -0-45 ___1 , I ____ , ,., ... . - ---- - __ - ___ z / , - ­....... .- ;,.��,.: %.,. W , CW \ .. \� I I / I / I \ - -4 2b------------, (9 \ % I I .­ - - -1 _ 436 -----/-/---, Air ; / I/ STAGING AREA --- --- -,. - __�,__ -.--. -_ / // // / / / I � � 1\ \ \ / t / I I I , I I 3o" RCP RISER I' /-(j�j\\\ - "I-. __ ­_ -, __ --'/, ' , - ... WATION // -I-- I 11// (�) , \ � BASIN INFORMATION - -- __ -- ---- __ / / / / It \ \ / �/ (S - ) Ul 4v* / I \ / I '_ -- -_ 1-1 F - , "�; o'. : � �_::-- - . --=-: -_ -- --- -_ I/ / � I � - - �2 P - _____4 __- .. , . I / �/ _, z 0� 0 Lf) II - - - ___ - _.- __ - -,-- __ __ -/.�t&_/_: 0 ..-,- �w �,/ /" 11-0 _\__ / \ ,\", , _-, �-- 3: 0 __ / tl \ \ __ - \ ,_ W/WIRE, ­ I . z 71 - _-C ",� I \ - _____ _ __ - -_ I- 1_' ," tq �� _.�, -)Q�:k �__-:�: - - _,�- �- j3� LU ) 11 , _ I` OP I __/ IP _j .. _�� , :�� �� - _= - =i 1\1 - -A , - 00 ' ­ 1-1 � __ ' — BEEN STABILIZED AND THE BRIARWOOD -_ i __ - -�\- --- - - < (n __ - S F -" 1_/ / ( ":;;"tv__ __ SF '-' ----/*"- K-:;A - * , E UNTIL ALL UPSLOPE AREAS HAVE " � j C)� —44­--- --- ­ _., ___ ,_ - W/ WIRI _(Sg, f ST , .... ­ 11__� A /11 J2�_ ��� -- _^,-_/'c:�__/\ ._ _/\___ _A, __ - \ _111 z I / - ,--,/ . 1-1 I,/ ) "I J *_ / OUTFALL INTO STONE WEIR IP ­_ / / — __ (WI=4.5', W2=id, L=ii.5', D=2') __ — — _____7 — — ; — \ — __ (N - ��___ ( - P: _: ___ /I' , , -­- z: �'_ -- - :� ::� ____ __ _:� ... . s :�----_ - - __ __ �--, .__ _____r, - __ - - --- --..--. -_ - --.-- __ _ _ - - - - -_ - _ -.-, - -_ - - ___ ... ____ ---I-------- U 1-- �_D\,_ - - _­ _� - /I I III I I I f__ - =��]:::� �_��_ ROA PLAN, __ - - - - __ - \N\,__ I — - _'__ — 111111111111111_ - 01 I ­ I � I / /I j / / / / � �i / Il //1111 I I I --- --INFORMATIQN __ __ __ __ �� - �, \ -, \\� I\ \ I // / / / .I,. �� ) I I I .111 _, , __­ - 11 *� r 9 � n::: / V_ I' Ni � &1- I I - A "cZ 0 S o T R. OLLINSZ U Lic. No. 035791 /* IONAL / / / _ __ _ f i r -- / j 0 j \j > 0 1714 (D L:J U) Lu Lu uj Lu Z 0 U) U) w 0 W Lu z 0 U 2: O 0 ^ u w m u u LLI < 5 Z i z z M : C) < 5 S U) r 0 0 LU Lu CD > z u < W — Ln V) 4 Z Z U a uj V) 1-17 > uj CAMELOT DRIYE lol Lu Lu Ln (701 ROW) ce > > LU LU LU a Lu ------------ V) /j'/ in > Lu >< v N RE </ in ­4 r4 00 EVELOPMEq L � 1/ `� __. � � ',r' ✓--� " -r " /\ \ '' � -_ � � , �' ,� / �s �` -- - j `. %/, c � / /// % f, � " ° � i ` , — _T < LE lip /X Z -tA tA /x Lu (y) cri "X x Lj il -7 Nt 7 co � -,^- yl zz zzl� I- "I z _ c L I L I ITS OF DISTURBANCE .-10. 8 A z N Lu C) CE MfN z CKIN z N Jim an DC S PAVED CONSTRUCTION ENTRANCE W/ WASH RACK 01 _c f8-`* -- ------- c 4— z 45 INSTALL WALL ------------- 4< _c cr _j I F_ z 4 y > ........... . .. ....... ...... .......... . ..................... ......... ....... .... ............. .. .... . pu� ... ..... ..... . ...... ..... ... ti............ . ................ ....... MEN= . . .. ......... x F- SEDIMENT7 i LIMITS OF DISTURBAl' 38'A c FOR CE WASH RACK , . ... . \ . ' � � f ( (' L ...... 0 ry L9 c 440 .... ..... 16 v----------- --------------- CON I'RACTOR PARI W.4 STAGIN V e, IG ARE� oS RN&E A LLJ SEESHEET8FOR FETY NK.xl z • DESIGN INFORMATION 'f'M, .. .. LLJ j, �rj 4s SEDIMENT BASIN tV2- NCE U o MPh,,­,,na V l)V EDIMENTTRAP#3' - "_m� _n -,�!i 20 Cw - o.6o IV _7 PROTECTION FENCE blAFETY FENCE 0\ AROUND BASIN 3-93 AC. D.A. 0 t-Ul-41 DC IRE O-S4 AC. 6 Tc - mo MIN D.A. P m c tr 1, > Cw - 0-45 Tc - 6.o IV DRAINAGE DIVIDE (TYP.) Ts DESIGN INFORMATION 4 MIN. -fjo L 3o" RCP RISER /_Pv ' , 1� 1-1 1_� ))) \ \ _c] DD 0'\ U) 06 24" RCP BARREL 44� ul r) (3 f _DD NOTE: SEDIMENT BASIN #i MUST REMAIN Z g� solo 11 _ LACE UNTIL ALL UPSLOPE AREAS HAVE OWE To 'BEEN STABILIZED AND THE BRIARWOOD DRIVE/ LLj m - — — — — — T R, R_i. P EXPANSION AND ELM TREE COURT Lf I I I LLj CONSTRUCTION HAS BEEN COMPLETED igm lau FR. new - ---------- - -- —=4 • / / x x 71c�_� W/WIRE Lu __BACKING-��! ORANGE OP I P SAFETY V c FENCE > A\ F 7z- z�X/ v NOTE: SEDIMENT TRAP #3 SHALL BE INSTALLED 7 .......... PRIOR TO THE REMOVAL OF SEDIMENT BASIN fF:L ct c A A A 77,,Z- 44 c ............. VDOT STD. EW--i VV/ Mir MlAr- OUTFACE I F/ALL.. ................. ... ... .... . .. .... ....... ACCOMMODATE LAND DISTURBANCE ACTIVITIES .................... ......................... ........ 0 > . ... .... ...... (Wi=6',W2=i8', L=12', D=2') SEE SHEET 9 FOR r TO ASSOCIATED WITH THE CONSTRUCTION OF THE ♦ '\—BACKIN DESIGN INFORMATION) STONE WEIR OUTFALL7 UNDERGROUND STORAGE FACILITY. C) • OUTFALL INTO EXISTING IP L STONE WEIR OUTFACE ROADSIDE DITCH as) aa--- 7 - W _, _V4 ­7 ttt ------- VDOT STD. ES-i wl RIPRAP 0 NOTE: CONTRACTOR TO USE FILTER FAIBRIC AND UTFALL STONE OVER EXISTING INLET TO PREVENT SEDIMENT' Lu m (WI=4-S', �l W2=34.5', L=lo', D=2') _j FROM ENTERING EXISTING DRAINAGE SYSTEM Ul ... ... .... ......... ................. c R#t (D z ­ E Lu Lu 0 LLI 13� c CL V) JOB NO. �z v V 122076 0 �>UALt 50 —.400— SEE ROAD PLAN, 1 50' N, R SHEET io FOR DESIGN cm -SHEET:Lo FOR DESIGN SHEET NO. c ATION N . ......... . . L -FEET-) -INFO R TI9J\J inch 7 _c /EXISTING SEDIMENT BASIN #1 \ CALE:1"=20' ! \ \ EXISTING SAFETY FENCE \ AROUND BASIN \ \ / w ! / / - f � xz z 01) 48" CMP RISER �4" CMP BARREL / o-Aoo DROP INLET CONNECTION TO EXISTING CULVERT ` UNDER ROUTE 29 _ 0 a / _- - 1 +00 - STONE WEIR Existing Sediment Basin #1 ;Design 170.,9 drainage area (acres) 2,55 basin volumes: (using Z contour intervals) 406.74 elevation} (If) contour area (sf} volume (cy) 404:00 2574.4 0 406.00 3523.0 224.9 44$:00 4578.0 524.1 410.00 5737.0 905.3 412.00 7001.0 1376.3 wet storage: wet storage required (cy) (67 *DA), 170.,9 design high water (ft) 409.7$' dewatering orifice elevation (ft) 406.74 top of dam (it) 412:00 wet storage provided at this elevation (cy) 335.,2 top width of dam (ft) 10.0 available volume before cleanout (cy) (34*DA) 86.7 bottom of basin (ft) 404.00 cleanout elevation (ft) 404.77 approx. bottom dimensions: 49'x91` distance'kom cleanout to orifice (ft) (> 1') 1.97 upstream face slope: 2 :1 W 425 2140' 1,879 .: downstream face slope: 3 :1 dry- storage: , 426 2682 4,285 158.7 +dry storage required (cy) (67 *DAA) 170.9 baffles. NO principle spillway crest (it) 408.78 length of flow, L (ft) 108 dry storage provided at this elevation (cy) 337.0 effective width, We (ft) 48' diameter of dewatering o6fice'(in) 3.0 L / We (baffles not required if > 2) 2.25 diameter of flexible tubing (in) (orifice +2 ") 5.0 wet storage requ►re,d (cy).:(67*DA) a1 0} ;, . collars: YES. runoff: 420 . depth' of water at spillway crest (ft) 4.78 G (use 0.45 for bare earth) 4.6 stone of upstream face (Z:1) 2:1 tc (min) 9.0 slope of barrel (Sb) 11.08% 1 2y 4.3 0 2yr 6.58 length of barrel in saturated zone (Ls) 54.28' 1 25y 7.1 Q 25yr 11.95 number collars_ required 2 SOIL OR AGGREGATE OVER BASE PLATE bottom of trap elevation (ft) dimension of collars 4.7x4.7 principle spillway ": 71:0; ;battomtrap dimensions i available head (ft) 1.0 emergency spillway:' NO diameter riser (in) 48 required capacity (Q25 -Qp) (cfs) N/A spillway capacity, Op (cfs) 11.95 bottom width (ft) N/A diameter trash rack (in) 72 slope of exist channel (ft /ft) N/A barrel length (ft) 63.7 minimum length of exit channel (ft) N/A head on barrel through embankment (ft) 13.29 crest of spillway (ft) N/A. diameter of barrel (in) 24 SEDIMENT TRAP -SCALE: 1"=20' / 426 / 424,/ '~ _ ST,- f 0 +'p / 1 +00 3° f °! 428 r ,--• /' -- f - - 428 � f E E E E / 420 1-414 STONE WEIR i OUTFALL - Sediment Trap 1 Design 363.1 drainage area (acres) 5.42 basin volumes: (using 2' contour intervals) drainage area (acres) (C3) 1.06 _. 426.00 6378.0 0 p volumes 521.9' 430.00 9196,0 1148.3 eleva%0n ft , volume(cf) volume{cY) .. 426.71 ........ 56'x138' 4 2 4 16 0 3 0 0. upstream face slope` 21 W 425 2140' 1,879 .: 69:6} 3 :1 .: 426 2682 4,285 158.7 dry storage required (cy) (67 *11DA) 363:1 - 427 3251 7,247 268.4 428.96 length of flow, L (ft) 80 42.8 384,4,; 10,790, 399.6 I i diameter of dewatering orifice (in) 6.0 L / We (baffles not required if > 2) ... ........................................ .... ..................... ... - -- .:. wet storage requ►re,d (cy).:(67*DA) a1 0} ;, . collars: bottom of stone weir (ft) 426.01 420 . depth of water at spillway crest (ft) 2.96 wet storage provided at this elevation (cy�_, -- 158.7 slope of upstream face (Z1) 2:1' tc (min) slope of wet storage sides 2 :1= 0.50% ' 9.27 length of barrel in saturated zone (Ls) 17,14 weir len th ft 6xDA 17.04 6.4 dry storage: SOIL OR AGGREGATE OVER BASE PLATE bottom of trap elevation (ft) dimension of collars 424 dry storage required (cy) (67`C7A} 71:0; ;battomtrap dimensions i 19'x_113' _. crest of stone weir ......... .............. 427.;0 top: of dam elevation (ft) . ... 428 dr storage rovided at this elevation c Y .. P (...y) 109.7 ........ !top Nndth of dam_( P ) ,....... ..... 6 slope of dry storage sides 21 :tap trap dimensions i 35'x134' GRAPHIC SCALE 20 0 10 20 40 ( IN FEET ) 1 inch = 20 ft. 80 � � / SEDIMENT BASIN #2 SAFETY FENCE "---' SCALE: 1"=20' i AROUND BASIN JJ f / VDOT ST ED W -1 w/ RIPRAP OUTFALL _ o (W1 =6', W2 =18', L =12', D =2') 432 JJ / 426 / V O JJ l BAFFLE J / 30" RCP RISER J I 0 +50 1 +00 24" RCP BARREL 0ko0 IJ 426 r- J 428 J \ - -430 432 _.432 VDOT STD. EW -1 w/ RIPRAP OUTFALL (W1= 3.75', W2 =8', L =11.75', D =2') 1 1 Sediment Basin #2 Design 363.1 drainage area (acres) 5.42 basin volumes: (using 2' contour intervals) 427.75 elevation (ft) contour area (so volume (cy) 426.00 6378.0 0 428.00 7736,0 521.9' 430.00 9196,0 1148.3 432.00 10755.0 1886.4 wet storage: wet storage required (cy) (67 *DA) 363.1 design high water (ft) 429.96 dewatering orifice elevation (ft) 427.75 top of dam (ft) 432:001 wet storage provided at this elevation (cy) 455.7 top width of darn (ft) 10.0 available volume before cleanout (cy) (34 *QA) 184.33 bottom of basin (ft) 426.00 cleanout elevation (ft) 426.71 approx bottom dimensions: 56'x138' distance from cleanout to orifice (ft) (} 1') 1.04 upstream face slope` 21 W downstream face slope: 3 :1 dry storage: : dry storage required (cy) (67 *11DA) 363:1 baffles. YES principle spillway crest (ft) 428.96 length of flow, L (ft) 80 dry storage provided at this elevation (cy) 363.2 effective width, We (ft) 105 diameter of dewatering orifice (in) 6.0 L / We (baffles not required if > 2) 0;76 diameter of flexible tubing (in) (orifice +2") 8.0 OF BASIN ELEV. = 446.00' € 6" DIA. DEWATERING DEVICE E f collars: YES runoff: 420 . depth of water at spillway crest (ft) 2.96 G (use 0.45 for bare earth) 0.45 slope of upstream face (Z1) 2:1' tc (min) 12.5 slope of barrel (Sb) 0.50% 1 2yr 3.8 Q 2yr 9.27 length of barrel in saturated zone (Ls) 17,14 125yr 6.4 Q 25yr 17.04 number collars required 2 SOIL OR AGGREGATE OVER BASE PLATE dimension of collars 2.9x2.9 principle spillway: LENGTH =6o' available head (it) 1.0 emergency spillway :: NO diameter riser (in) 30 required capacity,(Q25 -Qp) (cfs) NIA. spillway capacity, Qp (cfs) 17.04 bottom width (ft) N/A diameter trash rack (in) 42 slope of exist channel (fVft) NIA barrel length (ft) 60 rrinimum length of exit channel (ft) N/A head on barrel through embankment (ft) 5.80 crest of spillway (ft)> diameter of, barrel (in) 24 DRY VOLUME ELEV. REQUIRED = 427.00' 440 WET VOLUME 'LEV. REQUIRED = 426.00' 6' I 1.0' TOP OF DAM ELFV. = 428,.00' 435 - - STONE WEIR OUTFALL 420 EXISTING ; ND EXISTI G GROUND BOTTOM OF TRAP ELEV. 424.0c CREST OF STONE WEIR i ELEV. 427.00' CLASS I RIPRAP 410 0 +00 0 +20 0 +20 0 +30 0 +40 0 +50 0 +60 0 +70 0+80 0 +90 2 +00 ­0 1+20 -30 ­40 i 50 ­go i +70 1 +80 go z +00 2 +10 2+20 2+30 COARSE AGGREGATE FILTER CLOTH SEDIMENT TRAP #1 1.0' MIN. 430 8':' DIA. RISER TOP ELEV.= 08. 8' WITH I DESIGN HIGH WATER 4 4 7 �! DRY VOLUME ELEV.' 125 YR. STORM ' 72" DIA. TRASH RACK DEVICE 420 REQUIRED 408.78' ELEV :409 78� ........ ..... ...... _...... TOP OF DAM EXISTING GROUND ~ - - ELEV. = 412.60' EXISTING I 410 1.... -.... .. -. . --- .... -- GROUND - - - - 2.0 MIN!_ -- o ; 4 p � .... , .... _.. ......_. _ EXISTING DI BOTTOM OF BASIN ELEV. = 404.00' I INV OUT - 396.39 3" DIAL DEWATERING !DEVICE :INV. TO DI = 396.49' 390 0 +00 0 +10 0 +20 0 +30 0 +40 0 +50 o +6o 0 +70 0 +80 0 +90 1 +00 1 +10 1 +20 1 +30 1 +40 1 +50 1 +6o 1 +70 1 +80 MIN. 30" COMPACTED 24" CMP BARREL SOIL OR AGGREGATE OVER BASE PLATE LENGTH -63.7' 6'x6'x1/4" THICK GALV. STEEL BASE PLATE SLOPE = 11.79% INV. IN = 404.00' EXISTING SEDIMENT BASIN #1 EXISTING GROUND DESIGN HIGH WATER 3o" DIA. RISER TOP ELEV. = 428.96' WITH 25 YR. STORM 42" DIA. TRASH RACK DEVICE DRY VOLUME ELEV. REQUIRED = 438.96' ELEV. = 429.96' 1.o' MIN. 10' 440 z O I U) f E I € U 2: C C Z 0 - 7 Q N e , TOP OF DAM ELEV. = 432100' z z u I W L 430 : I z. o'MN ` EXISTING ; ; GROUND ND BOTTOM OF BASIN ELEV. = 446.00' € 6" DIA. DEWATERING DEVICE E f 420 . 0 +00 0 +10 0 +20 0 +30 0 +40 0 +50 o +6o 0 +70 0 +80 0 +90 1 +00 1 +20 1 +20 1 +30 1 +40 1 +5o 1 +6o 1 +70 1 +8o 1 +90 2 +00 2 +10 2 +20 2 +30 MIN. 30" COMPACTED INV. IN = z 0' 4 4 3 INV. IN = 424.00' SOIL OR AGGREGATE OVER BASE PLATE 24" RCP BARREL 4'x4'x1/4" THICK GALV. STEEL BASE PLATE LENGTH =6o' SLOPE =o.5o% SEDIMENT BASIN #2 04� SCOTT R_dLLINSZ Lic. No. 035791,E IQ&NVAL O z M w w 0 w w Q Ln -4 N r, r, 00 z O U) CL U 2: C C Z 0 w z 7 Q N O , w z z u W L I Fi O z M w w 0 w w Q Ln -4 N r, r, 00 430 4m 410 400 ----- ------- )le 16: Sediment Trap design (spec 3.13) Sediment Trap 2 Design 96 5 . - - ---- bptorn trap dinlensions: --- -- -- _- 0rai.nag.e area (acres),(<.3) st of stone weir .................... ......... .. ... . .... ......... - --- -- . .............. 1.44, trap �n?l�mes . ..... . .. . ... . . .... . ....... .... .. .... ...... ............ elevation area (sf) volune(cf) 0 I me -- - 497,5 1499 0 0,0 4084 172T 806 29.8 409, 1 2204 r 21766 102.5 ----- -- - -- -- 414 2706 1 5,217 1932 . ... ... .... ... .... 411 3233 ........................ ..$,183 303.1 ....................... ........................ ... ................ ... . . . . .... ............ ............. ..................... wet storage; --- - -- - ----- ------ wet storage required (cy) (67*DA) . 96.5, bottom of stone vveir (ft) ------ - ---- ---------------- -- ------------------------- GROUND 409.01 - -------- ---------- e e *�qvided at this elevation y wt storage p rag 96.6: ------- ------ — - - s! ©pe of wet storage sides 2:1 storage:' bottom of trap elevation ft 407.5', storage required ed _(cy), PA) (P7* 96 5 . - - ---- bptorn trap dinlensions: --- -- -- _- I 6lx1 00wi st of stone weir 410.0 top of dam elevation (ft) 411. storage 1 provided at this elevation (cy) 96.5- to width of dam ft), p Z) )e of dry storage sides 2:1' top trap dimensions 30'x114'- OF DAM ELEV. =411-00' EXISTING GROUND STONE WEIR OUTFALL PRAP 0100 0.10 0+20 0-30 o+,,o 0+50 0.60 0 f7o 0+80 0-90 IWO 1+10 1+20 1+3� 1 +50 1+60 SEDIMENT TRAP #2 COARSE AGGREGATE_ FILTER CLOTH SEDIMENT TRAP #2 SCALE: I"=20' o f;'409 /-1 4 0' d V l it /il � l l l ; ��. 0 12 0 C) - rq XF .70 0 STONE WEIR Ll/ + OUTFALL rl --.//a Ar 0 4- S EDIMEN\TTRA'P XCA E: 111 =20' OIL O, (C #3 0+ 50 010 �4 0 0 STONE WEIR OUTFALL 42 DRY VOLUME ELEV. —REQUIRED = 461.40 WET VOLUME ELEV:. REQUIRED = 46o.8o' i 6' TOP OF DAM ELEV. =403., 0' 6' CLASS I RIPRA P 400 EXISTING GROUND STONE WEIR OUTFALL EXISTING GROUND BOTTOM OF TRAP' L V.=400.00' 390 0100 G+lo -2o 0+30 0+40 0+50 040 0+70 0,80 —90 1+00 I+lo �! <: l+40 ­ 6o 1170 \ \—FIL CLOTH O'TH SEDIMENT TRAP #3 COARSE AGGREGATE CREST OF STONE WEIR ELEV. 401-40' GRAPHIC SCALE 20 0 10 20 40 ( IN FEET ) 1 inch = 20 ft. 80 N , 3 SC 'OLLINS�Z5 4 Lic. No. 035791 Qv kl%ll0KAL z 0 'NET VOLUME 1DRY VC!LUME IlLEV. LEV. REQUIRE- 7QUIRED 409-00'�t- = 410. 01 w C, z Z) 0 F- TO F r L XISTI�G C > Uj L . LASS I GROUND �OTTO M, OF T�AP ELEV,.=407. CRE' IT S OF E ONE WEIR V. 41000' -T OF DAM ELEV. =411-00' EXISTING GROUND STONE WEIR OUTFALL PRAP 0100 0.10 0+20 0-30 o+,,o 0+50 0.60 0 f7o 0+80 0-90 IWO 1+10 1+20 1+3� 1 +50 1+60 SEDIMENT TRAP #2 COARSE AGGREGATE_ FILTER CLOTH SEDIMENT TRAP #2 SCALE: I"=20' o f;'409 /-1 4 0' d V l it /il � l l l ; ��. 0 12 0 C) - rq XF .70 0 STONE WEIR Ll/ + OUTFALL rl --.//a Ar 0 4- S EDIMEN\TTRA'P XCA E: 111 =20' OIL O, (C #3 0+ 50 010 �4 0 0 STONE WEIR OUTFALL 42 DRY VOLUME ELEV. —REQUIRED = 461.40 WET VOLUME ELEV:. REQUIRED = 46o.8o' i 6' TOP OF DAM ELEV. =403., 0' 6' CLASS I RIPRA P 400 EXISTING GROUND STONE WEIR OUTFALL EXISTING GROUND BOTTOM OF TRAP' L V.=400.00' 390 0100 G+lo -2o 0+30 0+40 0+50 040 0+70 0,80 —90 1+00 I+lo �! <: l+40 ­ 6o 1170 \ \—FIL CLOTH O'TH SEDIMENT TRAP #3 COARSE AGGREGATE CREST OF STONE WEIR ELEV. 401-40' GRAPHIC SCALE 20 0 10 20 40 ( IN FEET ) 1 inch = 20 ft. 80 N , 3 SC 'OLLINS�Z5 4 Lic. No. 035791 Qv kl%ll0KAL U) LLJ LLI Uj (D z 0 U LLI 'IT 0 U LU 13- < U) 2: w w Ina —j U < o Uj U 0 >w rn LU U) 10 Uj LU n� Ui Cq 00 00 0) L9 zcyi 0) cy) CY) C) w w w z EMMEM U) w L9 0 —i z r 0 w LU F— Ul:D U) z w w U) F- 1-- W C� olf < (9 0 0 0 U V) Z 0 OA D U U < 0;5 0 w < C) P-4 —j U 0 cjC � LU 1-- Z 0 U 0 z U LU 0 LU 0 V) Cz z 0 < V) 1-4 0 C)e � co LU LU b LU 0 LU Ce -r M JOB NO. 122076 SCALE 50' SHEET NO. 9 z 0 U U) Lj Ul) ca C Z 0 w C, z Z) 0 F- > w r L � C > Uj L U) LLJ LLI Uj (D z 0 U LLI 'IT 0 U LU 13- < U) 2: w w Ina —j U < o Uj U 0 >w rn LU U) 10 Uj LU n� Ui Cq 00 00 0) L9 zcyi 0) cy) CY) C) w w w z EMMEM U) w L9 0 —i z r 0 w LU F— Ul:D U) z w w U) F- 1-- W C� olf < (9 0 0 0 U V) Z 0 OA D U U < 0;5 0 w < C) P-4 —j U 0 cjC � LU 1-- Z 0 U 0 z U LU 0 LU 0 V) Cz z 0 < V) 1-4 0 C)e � co LU LU b LU 0 LU Ce -r M JOB NO. 122076 SCALE 50' SHEET NO. 9