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HomeMy WebLinkAboutWPO201900062 Plan - Revision 2022-02-15@ 2022 - 30 LLC ABBREVIATIONS AC ACRE CFS CUBIC FEET PER SECOND CG-12 ADA ACCESSIBLE CURB RAMP (VDOT STANDARD) CL CLASS CO SANITARY SEWER CLEANOUT CONC CONCRETE CY CUBIC YARDS DB/PG DEED BOOK/PAGE DEQ VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY DIP DUCTILE IRON PIPE E&S EROSION AND SEDIMENT CONTROL EL, ELEV ELEVATION EP, EOP EDGE OF PAVEMENT ESMT EASEMENT EW END WALL EX EXISTING FH FIRE HYDRANT FPS FEET PER SECOND GW GUY WIRE HDPE HIGH -DENSITY POLYETHYLENE PIPE HT HEIGHT INV INVERT L LENGTH LAT LATERAL LF LINEAR FEET MAX MAXIMUM MH MANHOLE MIN MINIMUM NTS NOT TO SCALE PROP PROPOSED RCP REINFORCED CONCRETE PIPE SAN SANITARY SEWER STA STATION SVC SERVICE SW SIDEWALK SWM STORMWATER MANAGEMENT T TRANSFORMER TBR TO BE REMOVED TC TOP OF CURB TP TELEPHONE PEDESTAL UG UNDERGROUND VDOT VIRGINIA DEPARTMENT OF TRANSPORTATION VESCH VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK VSMP VIRGINIA STORMWATER MANAGEMENT PROGRAM WM WATER METER WV WATER VALVE C SYMBOLS EXISTING - - 498 - - SOUTHWOOD -PHASE 1 CLEAN EARTH FILL PLAN -NORTH AREA PROPOSED 12 WATER PROTECTION ORDINANCE (WPO) PLAN AMENDMENT WPO 2019-00062 GRASS DITCH LINING PER VESCH 3.32 VDOT STD. EC-3 DITCH LINING CONTOUR LINE WITH ELEVATION STORM SEWER STRUCTURE IDENTIFIER SANITARY SEWER STRUCTURE IDENTIFIER BENCHMARK, TEST PIT MANHOLE WITH FRAME AND COVER SPOT ELEVATION ADA PARKING SYMBOL WATER CROCK/METER FIRE HYDRANT WATER VALVE WATERMAIN SANITARY SEWER MAIN STORM SEWER PROPERTY LINE/RIGHT-OF-WAY LINE CENTER LINE FENCE LINE EASEMENT LINE SOUTHWOOD - PHASE 1 WATER QUALITY PHOSPHORUS PROJECT TRACKING Plan Number VRRM Total Area (AC) Phosphorus Reduction Required (lblyr) Phosphorus Reduction Provided (lblyr) Credits Purchased (Iblyr) T Phosphorus Treated onsite WP0201900062 21.58 9.77 8.52 1.25 87.2% WP0202100004* 7.49 8.52 6.67 1.22 78.3% Offsite WP0202100004 2.91 0.18 0.63 0.00 350.0% PHA Block 11 1.27 1.50 0.66 0.84 44.0% PHA Block 12 2.84 3.48 2.70 0.79 77.6% Village 2 4.88 4.60 3.12 1.48 67.8% "Northern Wedge" (SEE NOTE 2) 1.01 0.20 1 0.09 1 0.11 45.0% Total 41.98 1 28.25 1 22.39 1 5.69 79.3% NOTES: 1) PROJECT TRACKING FOR PHASE 1 PROVIDED BY TIMMONS GROUP 2) THIS VSMP PLAN AMENDMENT "CLEAN EARTH FILL PLAN - NORTH AREA" IS ALSO KNOWN AS THE "NORTHERN WEDGE" TMP 90A1-1 D SCOTTSVILLE MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA OMMOSE 1CNS HICKORY STREET 4i W C Q ti � CO 0 co SITE CITY LIMITS VICINITY MAP SCALE: 1 "=2000' WATERSHED DATA: N • LIMITS OF DISTURBANCE (LOD) = 1.01 AC. (THIS PLAN) • TOTAL LIMITS OF DISTURBANCE (WPO 2019-00062) = 16.69 AC. • INCREASE IN IMPERVIOUS AREA = 0.06 AC. (GRAVEL ROAD) • CONVERSION OF FOREST/OPEN SPACE TO MANAGED TURF=0.92 AC. • HUC CODE = JR-15 • RECEIVING WATERS = MOORES CREEK AND RIVANNA RIVER • AS DETERMINED BY THE US ARMY CORPS OF ENGINEERS (ACOE), NO ACOE PERMITTING OR REPORTING IS REQUIRED SINCE THE LIMITS OF DISTURBANCE COVERED BY THIS PLAN IS OUTSIDE OF ANY PROTECTED ELEMENTS OF A WATERS OF THE UNITED STATES. PROJECT TEAM ROLE COMPANY CONTACT PERSON OWNER/DEVELOPER HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE WILLIAM THIESSEN CIVIL ENGINEER 30 SCALE, LLC MICHAEL MYERS, PE, CFM GENERAL CONTRACTOR FAULCONER CONSTRUCTION COMPANY BRYAN RIECKMANN, PE ENVIRONMENTAL/WETLANDS WETLANDS STUDIES AND SOLUTIONS, INC. (WSSI) ANNA OEHSER SIGNATURE BLOCK COUNTY ENGINEER SHEET INDEX # SHEET TITLE 1 COVER SHEET 2 EXISTING CONDITIONS PLAN 3 GRADING PLAN 4 STORM SEWER PROFILES AND DETAILS 5 SWM ACCESS ROAD PLAN AND PROFILE 6 EROSION AND SEDIMENT CONTROL PLAN - PHASE 1 7 EROSION AND SEDIMENT CONTROL PLAN - PHASE 2 8 EROSION AND SEDIMENT CONTROL DETAILS 9 EROSION AND SEDIMENT CONTROL NARRATIVE 10 STORMWATER MANAGEMENT PLAN 11 LANDSCAPE PLAN, POND GRADING DETAIL AND MAINTENANCE PROPERTY INFORMATION TAX MAP AND PARCEL: PORTION OF TMP 90A1-1 D OWNER/DEVELOPER: SOUTHWOOD CHARLOTTESVILLE, LLC SITE AREA: 1.01 AC. TOPOGRAPHIC SURVEY LINCOLN SURVEYING 11-23-2021 DATUM: HORIZONTAL DATUM: NAD 1983, VA SOUTH ZONE, VERTICAL DATUM: NVAD 1988 CITY/STATE ALBEMARLE COUNTY, VIRGINIA ZONING: R-2 DEVELOPMENT AREA? YES FLOODPLAIN NOTE: THE PROPERTY IS LOCATED IN ZONE "X", AN AREA DETERMINED TO BE OUTSIDE THE 0.2% ANNUAL CHANCE FLOOD PLAIN AS SHOWN ON FEMA MAP NO. 51003CO269D, EFFECTIVE DATE FEBRUARY 4, 2005. EXISTING USE: MOBILE HOME PARK PROPOSED USE: CLEAN EARTH FILL REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 EMSCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILL 967 2ND ST SE CHARLOTTESVILLE, VA 2290; engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com qqrmm w Q 1 sheet title: Q MW 2 O Z I 1 Q W Z W J CU Z W 0 Z LU Z J D_ U_ N O Lu o U Z o Qow N Z 0_ �0 D>_ O > H Z O W a LU Q S COVER SHEE scale: AS SHOWN date: 12/23/2021 sheet # 1 OF 11 a F z D O U w J w m J V ZUZZ - JU JLALt, LLL m DTI I I I % f • , . , 1 , 1_, , _ \ \ \ \ \ `\ \\_ \\ PRESERVE D\SL©PE\ \ \\ PFR ALBE A L ARBEE RE E�COTY GI J I \ I ,, I ► I \ \\ \ \, \\ \ \ \ 1 EXISTI DIP�!A2TERI-IrE \ \ NItDIPI 1 2 RWS�— // \ \ l I III I WAT LIN " EAS 'ENT \ \ \\ /17,i/ 11 ��I \\IINII II�� I �_ `/A084G714A FIEX a- :NGH I V"443.26E 49 5 /27C /OUj'-47802�WATE PROTECTION �{ 0 /ORD NANCE BUFF / �/� -��PSpNpL\ / I ' #NAME / / jI /I'I//�/� l L + \\ \\ \F 76 \ / / Ar M°8� / '' / // 1/ � �/ / / I 429.57� \ \ \ T \\.EVEN \ \ ANAGEDSLOPItS /N�� PER ALBEMARLE #jN0 E l / / / / // /� Q / COUNTY GIS /'/ I EXI ���/ \ l / )\\ \ \ \ \ \\\ \ IOUT GSTO ( / �/ / SN /j/�// /��(�/� QX // \ / / " \\ /BCEMOVED #9E9� / '/ Gn/�� //sS� \ \ \ MOBIL //�5�- o-��A35 \\\\\\ \\ 56 436 5� ME '06BILE / n� / // / / �' // / / / /35i — V. 21 / //�no// �0tY(;NMHOp ( WIRE FfzNCE I V- 46 \ I I I \ ///�,74*61 / / L•� 1 E IS A MH (PRIVATE) / / /� Via' /� 3_ I I TOP=469.46 6—EX-jOEAVELPATH \ \ \ 8 V P N IN-464 7(t%V) i /� � ��/ D7 8' V P N IN= 64.90 (E) T / / r //� °/� / - Et2 rs El I8' IN .O T64.22(N) / 468.92 --����/ /7// "/ °y �,, E10 �44 NOTES: a7 //�� ">� //Z 1) EXISTING TOPOGRAPHY WITHIN THE LIMITS OF CONSTRUCTION IS ( dt ���LQ /FE'h / / / \ \ \ s BASED ON A TOPOGRAPHIC FIELD SURVEY BY LINCOLN SURVEYING S ' ���q / i /- k - - / / // _ — — / — \ \ \ \ DATED 11-23-2021. VERTICAL DATUM NAVD 1988, CONTOUR INTERVAL {' otFG 1\1,�E6 \ j i/ ����----__ ��\ \\ �0 1 IS ONE FOOT. !J—�3E5 2) EXISTING TOPOGRAPHY OUTSIDE OF THE LIMITS OF CONSTRUCTION / IS'''y/�'� tl �: �Ea \ —� - �/ / / 'S2 IS BASED ON ORIGINAL AERIAL SURVEY OF THE SOUTHWOOD \ \ \ \ \I \ �Dr�\ \ �— \ asp / / �/ / "� \ \ \ \ \ \ \ \ \ TRAILER PARK PROPERTY PERFORMED BY ROUDABUSH GALE & \ \ \ \\ \ Q I \ \ 5" RCR I N N�4- 1\\ \ 'ss \� �\ \ — �aTs9s� _ _ — — — — \\ \ \ \\ \ \ ASSOCIATES. j 3) THERE ARE NO JURISDICTIONAL WATERS OF THE US WITHIN THE 1 " RC4\�\\�C\ _ 454 — _ _ — \\ \ / / _ \ \ \ \ \ \ \ 1 LIMITS OF CONSTRUCTION AS VERIFIED IN THE FIELD WITH THE US 455— \ \ / — — —65 457 \ \ \ ARMY CORPS OF ENGINEERS (USACOE) ON DECEMBER 2, 2021 AND \ %� / 1 #780 \ \ \ \ 1 \ \ \ \ VERIFIED BY CORRESPONDENCE FROM THE USACOE DATED MOB/LE HOME \ \ \ \ \ I \ \ DECEMBER 8, 2021. REFER TO SWM BOOKLET FOR \\ / / \ CORRESPONDENCE. \ \ \ ��- \ _ GRA�ECRATkI — \ / \ \ a 49 � a �\ T — \ \ \ / / \ I I \ 4) MANAGED SLOPES SHOWN HEREON ARE BASED ON ALBEMARLE \\ \ \ \ \ \ L \ \ 1 ( \��_ — — \ \ / / / REFERENCE \ \ \ 1 I \ \ COUNTY GIS. THERE ARE NO PRESERVED SLOPES WITHIN THE LIMITS \ \ \ EXISTING STOR\vl DI \ \� \` �� ( �\ � z�l REM \ EXISTING CO---BY LAGS.__ \ \ I I I I I I 1 OF CONSTRUCTION. \--/ / BYWSSI \ \ \ 1 I I \ \ \ \ \\ \\ MH LID INV OU8,39 \ \\ �0 � — / / \ \ 458 / / 278 \ \ \ 1 I I I I I \ \ 15" RCP INV OUT�463.28 \ . � I \ \ \ \ \ I I \\ N _62=� �\T®\ \_�— STEEP SLOPES \ \ \ \ I 68. 3 \ \ '��� — / /�� \� \ \,/ I I I I I I I I LEGEND SOILS LEGEND 4\/6 9 yo. \ Ij I I I I I I I IIv_L/^.\L� MANAGED SLOPES SOILS TYPE E\ PaNLBOUNDARY \ L \ \ \\ \�✓/�/ I / //� II�f I I I I I I I I I rJ- Li'l� NRCS SOILS TYPE D 69 \ \ I _ SOUTHMII PRESERVED SLOPES EX° ACE ofcWI FENC CHARLDTTESVLE6 LL I TM\ 90A1- 1 I II I I I SLNGSANMH PR T\ /�� ZRRRNE: —2 ABBREVIATIONS \ /\ \ 57 I \ \ -46 - 2 \ / a�Q \ \ \ \ / 1 1 \ \ 6 VCP�V. IN--46E53 ( \\ y \ \ \ dj\�- \ �/ \ 1 \ \ 1 \ \\ INVERT Pl ' / \ \ I\ \ \ \ \ \ LP LIGHT POLE \ \ \ -8 N�/ QuT- \ .75 (w> \ \ \\\ \\ eFyo�� �X\ �/ \ \ \ \ \\ / \ \ \ 1 \ \ RCP REINFORCED CONCRETE PIPE 5 s\\ MH MANHOLESAN SANITARYSID SATELLITE SEWER SH I TP TELEPHONE PEDESTAL 00 a71. \\ \� \ \ / / \ \ \ \ \ \� TR TRANSFORMER 0 20 40 \ \ \ \ \ \ \ \ \ \ \ \tiC L \s \ \ \ \\ / // \\ \ \ \ \ \ _� \� VCP VITRIFIED CLAY PIPE SCALE: 1"=20' \\ \ \ \ \ \ \ \ WV WATER VALVE 0.0 \ \ � REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 DISCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE 967 2ND ST SE CHARLOTTESVILLE, VA 22903 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30sGale.com Q W W Q _ / L Z cWc z OW Z Z a i Z °N Q Q J W oCO z °' o O Q N O7 z o_ 0 J �0 J o� ILL _O H 2 W H IL Of W W >H 0 z W J U sheet title: EXISTING CONDITIONS PLAN scale: 1 "=20' date: 12/23/2021 sheet # 2 OF 11 Gl M ' \ \ �/ / J/� a,/�/—+.//- �"i\ (� `�/V� //\%/ /�/ �.� / , //�6/s' � ,"Y' �'�//_"/��-�Y // /� � I/ /\ w/ _�//-/ %/\ -/�\jC / / �;\/-�� Q/F6iv //j-/�5/EA8 `N 5 /•i -// / / _/ �' / \w//�� %'P/ /�/ 6 N��\/// '�`/. P /�6\a L //-i/ / T/ / P\ /'/ Y\�6''�/ ./�, /\\// /'////�\/\I /w/// /- // \\/ / / //j // /\ ///'\ , �i8 /°/ � / \/ _�//5/ /5/ //=\/\�\/ �N/ \_—e� i e /\^ Q\ ////sO\ �/n-�%/�\' ;(\/ // A\ / \+�'��\� //B\/Hj/�/ //iQA/ /Lf0/\ /�\ 0Q- �/D/ 5\ \�/�/�N I l /�I -/o\ / /�/Ye�,/\/4 I \ � //1 / / //_ tI/wII/ //�-I II1/ 1 / / _ -- � /�/ iS/� I I1NI I �1 /%� / E%/O6/� / J-_ /-I /,A/ / / /I�,o/iI �I I `// � / /�,/ � 1/B���/isJ I/<�I I / l. /���/j B// /O/////\ 5/ /M /I/\I 0I/ /��9/-# / I�,y II I I�I /5 ///N4/ //3 �I/,I��/ 6�VI — !/ //y\/d2/ /3\ ///>/\�✓J Ia / 1�— / � // �\/G�\ I � :—�i,/ y '\_n\i�\I �\ /�\I\jII� / I'\\ ,\ \I�\ �7�\I\�' /I\'s/ �1 II \\\ \\G� /��)�-/I \ P1I/�\%/I \I'\/���\i PIAj �/\ \'`\ //✓ I j \V\3/ \PI/� I '.`,\a\\TT/ �%I/a\I/l�E/\\/M\ I IR N I/ 1IN I� \PI�\ II 1II I �\ >� �\\1\I\II �I/ � �/ � /I� �I�0 \ / \�\ \ \\I I�, /\ I////I//\I\n I �s\ I- � s/ ?�\/=�\\//_\ 'k\ 1I/II\�II 0I�4 v /I I` 1I I I�/<\ LA\I\I—SI�\C—CI��\I�_ I(T\I '_\�II.I1 v\ \ \ PR\`IEIVE D I \\IL \b/ P\ \\\\ 7CA41E�RLE NGIS OF EIRBERLECOTYGEXPTIR�L5 IP LI432 IN WoOE iX \I PCP\- e\e* IN E ISTI 27C EX. SAN MH TOP=U���ZEWT ((SILL VO.Uq=47802 /T/ NS/N T8" VCP% OVER THIS{�E INWATE PROTECT \ �ti F \\\ `\ \\ \DORD%�ANCE BUFF SED OROME/ TNR7/ v \ \6 0w 9+57wAAVa.\�GOEASEMENT N 9'PR P�S \ \\�x i /\'D ANAGED SLOPS QPW P.i1 R$LOCATE EXISTING D ' L X 0W CLJTIO A PER ALBEMARLE/OUTL T PROTRlpN \ \ I A1 LITSF DITHI HE COUNTY GIS PEBEP( CY)WT ISTUREEXI U ER AYM PRIOR TO RATIONS OB"EMOVED H° 34MOBEAt f r'QO \µT PPu36" RCP 0%AMCONS N I EXISTING 4a6' BAN EN TIO NPR EU€RlNSERE tLE HOME /DU ING IL OPERATIONSVO SWEPOSED OVER THIS \ L'N LINTSOF 21 / DISTURBANCE 1.01 AC. 45/ _ B 7 45`A 2'4 - rt�// H (PRIVATE) °Iv /'L Al 4b2_ R445TO-469.46�--RAP N IN=4ONNEGVE\ E RP. 12'-WIDE .90E PATH TO18" N .O T.22 (N) 50 STORMWAT€R -NAGEMACCE�S R \CS�EA\EMENT 1\\\\VV / DISTURBANCE4- MAE-AIs —SANITARY SWEB 4 VICE DURIV .LV S R(l L 60 OPERATDNS-,NOTE NO XINSD� 8>1 nr EXISGG-SEW€R.LIN 454 457 X MOBILE HOME 0 L 46 EXISTIjC 1000, 5827B STEEP SLOPES asas, Ao� 4 P 4e8-- - 31'-PROP �„ \P; 4.00 60 X\ LEGEND SOILS LEGEND ass. 62 MANAGED SLOPES SOILS TYPE BOUNDARY 64 IL I ELEC PPATQEL ROCATE E27C NRCS SOILS \ \\\ TYPE XISTING D� UT LT ES.PR OR TO FILL PRESERVED SLOPES OPERATIONS OUTHWOOD q ke�of6 � WI�ENC PROP .3�5-LF 1wIDE�CCHARL TTESVI�LE, LLr MSC�5IT90A1-1D ABBREVIATIONS NEWCONGY c ST.INGSANMHPR46T IVEWAaQ.57 PI LSECTGI CLEANOUT '6PRO IN INVERT 6 VCPPNVIM6 53 90 O RCP REINFORCED CONCRETE PIPE RO�'A�LIP LIGHT POLE N\5.75 S<'S W-SANITARY SEWER -6'VCP IN 465.1� UP 8_VCP IREMANHOLE47'/ II \5 s MAI�GEMENT SA 49, ACCES EAS�MENTSO SATELLITE DISH\Y7B\ TP TONE PEDESTAL TR TRANSFORMER 0 20 40vGT71_ VITRIFIED Y PIPE 4SCALE: 1 "=20'/ —WV WATER VALE \\ VCP \\\ \\\\ V \� \�\\ \ \`�� REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 l! ZUZZ - JU JLALt, LLL EMSCALE ENGINEERING owner: HABITAT FOR ]EE GREATER CHA 967 2ND ST SE CHARLOTTESVengineer: 30 SCALE, LLC 871 JUSTIN DRPALMYRA, VA 2p: 434.242.2866 e: mike@30scalweb: www.30sG Gl z_ 0 F- z 0 0 w J W m J ¢ sheet title: GRADING PLAN scale 1 "=20' date: 12/23/2021 sheet # 3 OF 11 V ZUZZ - JU JGALt, LLL, 480 475 470 465 460 455 450 445 440 435 430 425 420 415 W O C1 X WI F2 _ (+m — �000 V N v u u ? 0 F L— 8'LX4'W CL Al RIP -RAP 18" DEEP WITH FILTER FABRIC UNDERLAYMENT 24' HD O o — O N V F O Z PROP 12" E @ 2.02% LL O o C4 N 0- o+ O I co 0 a X CL I' v CIDn v v v + 0+00 + STORM SEWER 6-7 PROFILE TO STR #5 DA=3.16 AC. C=0.55 \ 495 490 485 480 480 475 475 470 470 465 465 460 460 455 455 450 450 445 445 440 440 435 435 430 430 425 425 420 420 415 415 410 W (D X W o O a0tzr. F- 2 3 = ^ a EX, (2) DROP INLET STRUCTURES AND (2) MANHOLES TO BE REMOVED AND REPLACED WITH NEW DI=3C TOPS- AND MANHOLE BASES. sr o r ^^ W O = W to - CO I (O U 11 `T ? w CONSTRUCTION OF DAM - EMBANKMENT AND PIPE PENETRATIONS TO BE PERFORMED UNDER THE - SUPERVISION OF A ECTECHNICAL ENGINEER OP.GRADE - zo -z X 2 W Of >_ w L ¢ w Q > F LuLu CLR. - i 31' -PROP 36" RCP @ 4.00% P @ 90 255, _ PROP 36" RC APPROX. LOCATION EX. 8" VCP SANITARY SEWER (PRIVATE) X-ING - DIG TEST PIT TO VERIFY INVERT 14.0' - - EX. 34-LF 15" RCP EMO REPLACED WITH NEW 36"-DIA RCP — - PROP 36" RCP @ 5.00% O Of O U 90 z 0aa _ _ 59' -PROP 36" RCP @ 2.00% 141 X 20'W CL Al RIP -RAP OUTLET PROT��AT 24" DEEP (22 CY) WITH FILTER FABRIC ... UNDERLAYMENT O o -- '— ^tr_ - .... LO T II ¢ O o I- v m O O tz W O O N N Cl) I -1": a0 to m v II m 0 z » Z Z - - N .... W M u') 7 6 LO N r - — O (o V II — + II O Z > M + 'IT It z 0)II �O O > z + - I. ¢ ' U) II _ z = m M (n z M O (n (n m Cl) W 9 O CO a0 v or CL N to m v (O O CD �n V m v v O O) ICD V V v v N O N N It V v v (O Ln Cl) V It V ITv m N (n (O It V v v V 7 WI` It V v v r m m of (n d' Itv to r 6 O) (n 7 v In V L6 O (I) It (n Co 1 C6 I--W (n It v (n (n n I.- (n It v Cl) N I.-r r.- (n v v O O O L6 W (O v v m In 06 r O v v m aD (O v + 0+50 + 1+00 + 1+50 + 2+00 + 2+50 + STORM SEWER 1-5 PROFILE TO STR #4 DA=0.79 AC. I I I llll II II1111�1 \�\� C=0.70 TO DITCH jj DA=0.76 AC. C=0.47 STORM SEWER - DRAINAGE AREA MAP SCALE: 1 "-100' STRUCTURE #2 - RISER VDOT MH-2 WITH T-DI-1 FLAT TOP 5.3' FLAT TOP (T-DI-1) TOP ELEV=444.50 M ; 4.0' 67 STEPS PER VDOT ST-1 CV ' N 36"INC433.26RP INV. (FROM STIR. 3) 36" RCP INV. 1 \ Iz/ I 1 OUT=432.26 (TO STIR. 1)7. \ / a STRUCTURE #2A VDOT STD. EW-1 3+00 TOP OF EMBANKMENT = 445.00 PROVIDE REBAR CAGE TRASH _O I v) RACK COVERING 2'W X 1.83'H I' 1 ai WEIR OPENING Z 1 = EL=444.00 100-YR WSE=443.87 O CO STRUCTURE 2 TO REMAIN C 1 W OPEN DURING ALL PHASES 10-YR WSE=442.91 ? 1 SEDIMENT TRAP o DRY STORAGE N 1 EL=442.00 PROP.GRADE 1 1-YR WSE=440.84 1 2'W X 1.83'H WEIR 1 SEDIMENT TRAP INV.=442.00 TRASH RACK AND b METAL PLATE PER 1 WET STORAGE VDOT STD. SW -DR 1 10-LF 15" RCPt@ 2.00% 1 ~- 1 EL=438.00 EXTEND CONCRETE 18" PAST FACE OF ENDWALL 4"-DIA ORIFICE AT )E INV.=438.00 DURING E&S PHASES, \ CONTRACTOR TO PLUG 4" ORIFICE STD. IS-1 :TE BASE NOTE: ALL CONSTRUCTION SHALL CONFORM TO THE CURRENT EDITION OF THE VDOT ROAD AND BRIDGE STANDARDS AND SPECIFICATIONS. STORM STRUCTURE 2 AND 2A CONSTRUCTION DETAILS NTS 3+50 465 460 455 450 445 440 435 430 425 420 415 410 w 0 (, X W 4+00 4+50 o � _ v vw� u CL OC/) 0) +oZ CDZ_. (n Q I W W It ^ m N 0 (D�ILL L N (D (\I m N r V M n II D II II d +o _Z_Z o_ (0 (0 In m m , U) :PRO . GRADE - WEIR PLATE WITH - ASH RACK PER VDOT STD. SW -DR EX. GRADE 10' - PROP 15" RCP @ 2.00% 0 r co m 7 Z) Z n w -IT o� a 00 0+00 + 0+50 STORM SEWER 2-2A PROFILE 0 20 40 0 10 20 HORIZ. SCALE: 1"=20' VERT. SCALE: 1"=10' REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 495 490 485 480 475 470 465 460 455 450 445 440 435 430 425 420 415 410 465 460 455 450 445 440 435 430 425 420 415 410 EMSCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE 967 2ND ST SE CHARLOTTESVILLE, VA 22903 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30sGale.com Q W TEMM W Q _ ) Z W z TOZ i WW G z Z a 1 z °N Q Q Q j W I 0. Z O o a_ ZN Z 0_ J p0g LL o F_ = w H a Lu w >< Oz U W ..j U El sheet title: STORM SEWED PROFILES AN DETAILS scale: HORIZ. 1 "=20' VERT. 1 "=10' date: 12/23/2021 sheet # 4 OF 11 @ 2022 - 30 SCALE, LLC 12'-WIDE SWM ACCESS EASEMENT (GRADED) 10'-WIDE SWM ACCESS ROAD 6" VDOT STD. 21A 2.0%'� n' RIGHT DITCH LEFT DITCH * UNLESS OTHERWISE SPECIFIED WITH A CROWN SECTION ON GRADING PLAN (SHEET 3 AND SHEET 11) SWM ACCESS ROAD TYPICAL SECTION NITS DITCH LINING SCHEDULE STA 10+25 TO STA 12+00, USE CLASS Al RIP -RAP OR AN EQUIVALENT GRADATION OF STONE WITH d50=9". 500 495 490 485 480 475 470 465 460 455 450 445 440 435 430 CST 13 NEW I ONCRETE APRON m X N X A Z � m X (u IRIGHT 1 SIDE II PROPOSED 10'-WIDE SWM ACCESS ROAD PROP. 0 STORMWATER 11yq L(7 MANAGEMENT EASEMENT LO— v � t o / 2A N 12+Q 1 0' 00 a 100'R / TA - -SIR F ti Nya F��c � csq� AgIV c0 �O mo rn SWM ACCESS ROAD PLAN SCALE: 1 "=20' 1 \ PT: 13+23.50 1 .0' \ PC:12+95.59 h \ 13+00 1� L___. PROP. 12'-WIDE STORMWATER MANAGEMENT ACCESS EASEMENT DITCH LINING FROM STA 10+25 TO 12+00 PER DITCH LINING SCHEDULE THIS SHEET PROVIDE PVI STA=10+22.91 PVIELEV=469.51 L = 20.00 N N + m � o 0 a� as Ln j a s a- a -2.08 % CONNECT TO BITTERNUT LANE WITH CONCRETE DRIVEWAY APRON CURB CUT — PVI STA=11+86.51 PVIELEV=445.00 L= 50.00 W + c u asw + i �w 5> O u n 00 PROP. ACCESS ROAD CENTERLINE GRADE 0.00% 12+08=APPROX. LOC. 12"_STORM SEWER X-I NG EX. J GRADE 13+52=APPROX. LOC. PROP. 36" STORM SEW X-ING w 0 C7 a 0 IL IL O o ai r` v O of co v V LO cn v r` : co in v v O ro L v N It v Lq L c O v v N ui v v O LO d- v v ui d' v r v ui v v ui v v ui It v LO v v ui v v 10+00 + 10+50 + 11+00 + 11+50 + 12+00 + 12+50 SWM ACCESS ROAD PROFILE + 13+00 + 13+50 + 0 20 40 HORIZ. SCALE: 1"=20' 0 10 20 VERT. SCALE: 1"=10' 500 495 490 485 480 475 470 465 460 455 450 445 440 435 430 REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 EMSCALE I ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE 967 2ND ST SE CHARLOTTESVILLE, VA 22903 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com Q Z Z W of " W Z D U Lu W Lu co /1/ C o O W ZQ � Z J d i Z Q Q J aN o W �o 0. Z � o 0 J QNCL Z d o0 0 J >� LL 2 _O U W H a C) Q Lu W U) U) w >~ Q O Z w r c� Q W V ) w J J_ i J F- r U U) U U sheet title: SWM ACCESS ROAD PLAN ANC PROFILE scale: HORIZ. 1 "=20' VERT. 1 "=10' date: 12/23/2021 sheet # 5 OF 11 V ZUZZ - JU JGALt, LLG m PRESER ALDL PEBE COUN� REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 ARESE VED SLOPES PELBEgARLE COUNTY GI I \ I I 1 \ ^ _ EXI ITI P IT WAT IN li7� �y'�'V� Ci / / / / / ,,w-� ) I I I 1 s to o/ / 1 \�\ \ nn \ \ EX. SAN MH ' I / \ ITOP=48 .17 8" VCP V OU� 478.02 /pay / /A WATERNROTE FTIO� \ \ \ \ 1 / II'Ip 'I / I I ORDA C BU F l .L } \\ \ \11V1-NI� �6 OJT 3F1 \\ OZONE: R - 2 \ \� :-J?-'SIDENTIAL \ / \ ANAGEDSLOPES / / / /'// / \�\ \ \ PER ALBEM LE �! I COUNT*GISg\\GHOM IOUT G-f / / e / SNEO // / �/ /BL�EMOVEDVED BILE H436 OME 440Is- �x50�Q�i/��/ L�ag6 / 44� o�jSAN MH / WIRE FENCE i _ r4 ` — 2 \ — / f7n�n /�/`'`� '� / / /0 / / / — —s \ \N BIiC\ II�V=43,46 \\\ \\\ \ \\ \ \9� `\ EJIS A MH (PRIVATE) / T TOP=469.46 �=Y� �X o-0 / / / , 6 3 �445 / / \ \\\ \\LL\ I8V PN IN=464) /�' �� //�/� / / / �' —_—�\\\\\\ 1" V P N IN 64.90 (E) T i /°6 /�//� �j� Q ��+ /2 8 D7 � 5 / ��./ E11 } ag/ � // i � � f IN .0 T�64.22 (N) i / as i/ /aso\ \ \ 468.92 / j/� / °e �Q /% "E,o /� / \ \ \� I \\ 4�-, — // —�\ \\ \ \ \ N \II ! (4 a ��— _�E'l� _ ////�/, ___ _�_ \� E\ \� ° IS1 Itytz . \ a \ \ \ \ \I ��L1,DT6 .\ STEEP SLOPES \\ \ 5"RCP IN 4 1 's \ \_� / a36s8� �� \ \ LEGEND SOILS LEGEND \ \ _ _ \ \ 457 \1'�\ ��\\��a52 /5 // MOBIEHO \\ \ \ \ SOILS TYPE ME \ \ MANAGED SLOPES L —. BOUNDARY ' \ �/ \ \ \\\ / \ sQ� �\ /\gyp _ \ \ \ ('x /\ \ N \ � I \`� o � — \ \ I I 27C NRCS SOILS TYPE \ \ \ \ \ \ EXISTING STOR\vl DI \ \�. Q �� \ �\\�� — — \ \ — — EXISTING SA�V COC j / — — — ` \ \ \ \ �/� PRESERVED SLOPES MH LID TOP=468'39 \ I \ \\ \ \\ \ I \\\ 15" RCP INV OUT163.28 \ \ \ �\ \ �Q / / y \�\ ass — 27B __ / / 7-- asz-- T® \ \ \ \ I 66. 3 �, \ \ ����— / \ \ \,// \ I ABBREVIATIONS CO CLEANOUT \ \ 1 \ 1 \ 469�� yO?�� \ / / I I INV INVERT � ELEC L / / LP LIGHT POLE e I I RCP REINFORCED CONCRETE PIPE SAN SANITARY R I \ \ / Q� /\ \ �(• 4 9 \ \ / // MH MANHOLE \ \ k \ G \ /F� CL \ \ I / OUTHWOOD I SD SATELLITE DISH \ F Cl7 B �, C WIRE FENC \ \ — / / // CHARLO\TTESVI j LE LL� I TP TELEPHONE PEDESTAL r \ \ \ \ ` / {� TR TRANSFORMER SCALE: 1"=20'20 40 \ TM 90A 1-1 D I VCP VITRIFIED CLAY PIPE 1 1 1 WV WATER VALVE i STING SAN MH (PRIVAT \ s \ \ /�� Z NE: /�-2 I 1 OPP4468.6z 6rVCP�V. IN=46G 53 --B-VCP IN 465.) (E) \ —w VCP IN U 5.75 W) \\ \\ A9< O \ \ \ e/Fy \ \\ \ \ \ �278 \\\/\ 5 e'TT 471 \ \ \ \ \ \ \ \ \ \ a7 T DISCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE 967 2ND ST SE CHARLOTTESVILLE, VA 22903 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30sGale.com C Z 0 F- Z 0 W J a w m J Q "1 sheet title: EROSION AND SEDIMENT CONTROL PLAN - PHASE 1 scale: 1 =20' date: 12/23/2021 sheet # 6 OF 11 @ 2022 - 30 SCALE, LLC SEDIMENT TRAP DRAINAGE AREA MAP SCALE: 1 "=100' /_ I / x I LOD � l i i l I I► I� �I �\ �/ I i 1 1 1 111v v v I I i 11� I I I I I� v REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 \I I�\_a3� \ \ �N I III I III I 7-_ I�II 11`\\11i� I�)/►I I III- _ �1 \ \\`�/ 111111�1 I I c //�/)111111 II\ \\\ �� /' // / / / ,/ / / //� / / ;_,� ill I�"I I II �/// l I111 \\\II \� •• (� \\ \`\ \\\\�� v. �i� 39D //a29.F D /� ` �/F 6SA�A v \ \ N � I xv yp� 0 p 34 iSAF tVAFI / >� 36 \ \ \ —21 / 2.t SAF (EXISTING SAN MH (PRIVATE) TOP=469.46 8" VCP INV. IN 464.87 (W) �db� y _. Tom? I8" VCP INV IN=464.90 (E) T — 8" VCP IN O T=464.22 (N) q 8.92 ��- I g69-7 'i I TI '—tea 0 \\ \\\\\ / N \ -o . V A \ \ I I I I 466. 3 �` STING SAN MH (PRIVAT \ s \ TOP=468.62 a�o.6 6" VCP INV. IN=466.53 O \\\\ s 6" VCP INV. IN=465.77 (E) \\ \ \ �\ \ 8" VCP INV. OUT=465.75 (W) \ \ \ \ 6 \27B� 1 ^A \ 42 �kQ / s Ex I TING SAN MH (Pk�l TEl \ \\ \ \\ \\ / TOP 4l 44 �� —�� \9 BENC NV=438.46\VA VA\ \J \ �f'�R// �" y�, -' /�N �� 43 %-7` bassi \\0'� ``\\ Ais Gil + E5 ' a ti ° �/ —a� — _ \ \ \ STEEP SLOPES ° - _ 54 55 ,,�,e / ---457 LEGEND SOILS LEGEND .r ^ - 4/ _ MANAGED SLOPES mmob SOILS TYPE BOUNDARY Ile\ I I I 27( NRCS SOILS TYPE �a58 j� 27^ PRESERVED SLOPES 1 58 v I 1 J 4, � TP � ABBREVIATIONS CO CLEANOUT \ h r r 64 �p \ \ \ // I I I l INV INVERT ob LP LIGHT POLE 6 + f } I I I I RCP REINFORCED CONCRETE PIPE s \ \ \ /� I tJ SAN SANITARY SEWER D 8 \` \ \ ✓ / SOUTHWOOD l MH MANHOLE 6 \ \� \ SD SATELLITE DISH F \ `\ _ _ - / / // CHARLOTTESVILLE, LLC I I TP TELEPHONE PEDESTAL TR TRANSFORMER 0 20 40 TMP 90A 1-1 D 1 1 I I VCP VITRIFIED CLAY PIPE SCALE: 1 "=20' ZONE: R-2 1 \ WV WATER VALVE 71 _ x \ J f _ EROSION STD# AND ABBREV. SEDIMENT SYMBOL CONTROL LEGEND E&S PRACTICE 3.02 CE '� CONSTRUCTION ENTRANCE 3.05 SF X—X— SILT FENCE 3.01 snF -0--El SAFETY FENCE (CHAIN LINK) 3.07 IP O INLET PROTECTION 3.09 DIVERSION DIKE 3.13 STD TEMPORARY SEDIMENT TRAP 3.31 TS TEMPORARY SEEDING 3.32 PS Ps PERMANENT SEEDING 3.35 MULCH LOD LIMITS OF DISTURBANCE EMSCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILL -67 2ND ST SE CHARLOTTESVILLE, VA 2290; engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com WQ U r z w c N G 11 fi Oz w Z z a i Z °N Qboo Q J w o Z � o O Qow z CV d OJ o� _o 2 w 0 a Q w wa Oz co Q W J CU �N Lic. No. 33028 02/09/2022 S / 0 N A L ECG` sheet title: EROSION AND SEDIMENT CONTROL PLAT PHASE 2 scale: 1 "=20' date: 12/23/2021 sheet # 7 OF 11 © 2022 - 30 SCALE, LLC BLOCK do CRAVEL CURB INLET SEDIMENT FIL TER CURB INLET Ili%'�ia1 i"TT' Fla CA 0 "� RUNOFF OVERFLOW WATER WITH FILTERED WATER SEDIMENT. SEDIMENT I WIRE SCREEN 2" X 47 WOOD STUD CURB INLET SPECIAL APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE AN OVERFLOW CAPABILITY IS NECESSARY TO PREVENT EXCESSIVE PONDING IN FRONT OF THE STRUCTURE. • GRAVEL SHALL BE VDOT #3, p357 OR y5 COARSE AGGREGATE IP) INLET PROTECTION BLOCK AND GRAVEL DROP INLET SEDIMENT FILTER VESCH STD. 3.07 TEMPORARY DIVERSION DIKE I 18" min. 1 Compacted Soil Flow 4.5' min. DD) DIVERSION DIKE VESCH STD. 3.09 REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT A THE EXCAVATED SOIL. FLI SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) SF) SILT FENCE DETAIL VESCH STD. 3.05 TABLE 3.35-A ORGANIC MULCH MATERIALS AND APPLICATION RATES RATES: MULCHES: NOTES: per Acre Per 1000 sq. ft. Straw or I lay 1's - 2 tons 70 - 90 lbs. Free from weeds and coarse (Minimum 2 matter. Must be anchored. tons for Spread with mulch blower winter cover) or by hand. Fiber Mulch Minimum 35 lbs. Do not use as mulch for 1500 lbs. winter cover or during hot, dry periods.* Apply as slurry. Corn Stalks 4 - 6 tons IRS - 275 lbs. Cut or shredded in 4-6" lengths. Air-dried. Do not use in fine turf areas. Apply with mulch blower or by hand. Wood chips 4 - (> tons IRS - 275 lbs. Free of coarse matter. Air- dried. Treat with 12 lbs nitrogen per ton. Do not use in fine turf areas. Apply with mulch blower, chip handler, or by hand. Hark Chips 50 - 70 cu. 1.2 cu. yds. Free of coarse matter. Air - or yds. dried. Do not use in fine Shredded turf areas. Apply with Bark mulch blower, chip handler. or by hand. ` When fiber mulch is the only available mulch during periods when straw should be used, apply at a minimum rate of 2000 Ibs./ac. or 45 Ibs./1000 sq. ft. Source: Va. DSWC STONE CONSTRUCTION ENTRANCE 70' MIN. I EXISTING RE NIN. L VOOT POSITIVE DRAINAGE COURSE AGGREGATE B TO SEDIMENT TRAPPING DEVICE MUST EXTEND FULL WIDTH OF INGRESS AND EGRESS PLAN VIEW OPERATION 12' MIN. SECTION A -A SECTION B-B 5:1 MOUNTABLE ( TIONAL> to, MIN 0' NIN �— EXISTING PAVEMENT l0' MIN CE) CONSTRUCTION ENTRANCE DETAIL MU) MULCHING SPECIFICATIONS (ps VESCH STD. 3.35 VESCH STD. 3.02 1992 3.32 TABLE 3.32-D SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA Total Lbs. Per Acre Minimum Care lawn - Commercial or Residential 175-200 lbs. - Kentucky 31 or Turf -Type Tall Fescue 95-100% - Improved Perennial Ryegrass 0-5% - Kentucky Bluegrass 0-5% Muh-Maintenance Lawn 200-250lbs. Kentucky 31 or Turf -Type Tall Fescue 100% General Slooe (3:1 or less) - Kentucky 31 Fescue 128 lbs. - Red Top Grass 2 lbs. - Seasonal Nurse Crop* 20 lbs. 150 lbs. Low -Maintenance Slope (Steeper than 3:1) - Kentucky 31 Fescue 108 lbs. Red Top Grass 2 lbs. - Seasonal Nurse Crop ' 20 lbs. - Crownvetch •• 20 lbs. 150 lbs. ' Use seasonal nurse crop in accordance with seeding dates as stated below: February 16th through April ...................... Annual Rye May 1st through August 15th ..................... Foxtail Millet August 16th through October ...................... Annual Rye November through February 15th ................... Winter Rye '• Substitute Sericea lespedeza for Crownvetch east of Farmville, Va. (May through September use hulled Sericea, all other periods, use unhulled Sericea). If Flatpea is used in lieu of Crownvetch, increase rate to 30 lbs./acre. All legume seed must be properly inoculated. Weeping Lovegrass may be added to any slope or low -maintenance mix during warmer seeding periods; add 10-20 lbs./acre in mixes. III - 303 PERMANENT SEEDING SPECIFICATIONS VESCH STD. 3.32 SEDIMENT TRAP COMPUTATIONS ST DA WET STORAGE REQUIRED DRY STORAGE REQUIRED WET STORAGE PROVIDED DRY STORAGE PROVIDED BOTTOM TRAP DIMENSIONS CLEANOUT ELEV # (AC) (CF) (CF) (CF) (CF) 1 2.33 4215 4215 4256 5901 +- TX 14' 441.0 (TRIANGULAR) 1992 TEMPORARY SEDIMENT TRAP VARIABLE rvar•wl VARIABLE u D -SEE PLATE 3.13-1 COARSE AGGREGATE CLASS I RIPRAP CROSS SECTION OF OUTLET (N/A - OVERFLOW IS VIA STRUCTURE 2) CLASS I RIPRPP LENGTH %GI DRAINAGE AREA (IN AC.) /O EFtSION DIKE p(E COARSE A4CrRECAT�` // �"\�\ EXCAVATEO /FILTER CLOT/ 1 /7 J/AREA / ••COARSE AGGREGATE SHALL BE VDOT 13, #357 OR /5 OUTLET (PERSPECTIVE VIEW) Source: Va. DSWC ST III - 76 SEDIMENT TRAP VESCH STD. 3.13 TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS -QUICK REFERENCE FOR ALL REGIONS, Rate Planting Dates Soccies lbs. acre Sept. 1- Feb. 15 50/50 Mix of Annual Ryegrass (Lolium multi-florum) & 50 - 100 Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100 (Lolium multi-florum) May 1 - Aug 31 German Millet 50 (Setaria italica Source: Va. DSWC 3.13 Plate 3.13-2 TS) TEMPORARY SEEDING SPECIFICATIONS VESCH STD. 3.31 EMSCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE 967 2ND ST SE CHARLOTTESVILLE, VA 22903 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com Q Z W" > >- 1..� Z 7 Lu W Lu I- U/ LU LU G J Q z pW G ZQ � J d i Z Q J fl W cV o 0 z QNCL 1 o 0 J J z o0 off~ a _ LL 2 _O I- W 0 a Q(r w W L L/) Q O Z >~ IY w to ///��� U/' c9 w v , I ' ' J i J to r U) U U U heet title: EROSION AN[ SEDIMENT CONTROL DETAILS scale: AS SHOWN date: 12/23/2021 I sheet # 8 OF 11 n EROSION AND SEDIMENT CONTROL NARRATIVE PROJECT DESCRIPTION THE PURPOSE OF THIS PLAN IS TO PERFORM CLEAN EARTH FILL OPERATIONS IN AN APPROXIMATE 1-ACRE GULLY LOCATED IN BETWEEN FIN COURT AND IRIS COURT BOUNDED ON THE SOUTH BY BITTERNUT LANE AND ENDING AT THE WATER PROTECTION ORDINANCE BUFFER ON THE NORTH. BASED ON SITE VISITS AND CORRESPONDENCE WITH THE US ARMY CORPS OF ENGINEERS (ACOE), THE LIMITS OF DISTURBANCE COVERED BY THIS PLAN IS OUTSIDE OF ANY PROTECTED ELEMENTS OF A "WATERS OF THE UNITED STATES", AND THEREFORE NO ACOE PERMITTING OR REPORTING IS REQUIRED. ALSO, NO DISTURBANCE OF THE WATER PROTECTION ORDINANCE BUFFER IS PROPOSED AND THERE IS NO 100-YEAR FLOODPLAIN WITHIN THE LIMITS OF DISTURBANCE. EXISTING CONDITIONS THERE IS AN EXISTING STORM DI INLET AT THE LOW POINT ON BITTERNUT LANE THAT DISCHARGES INTO THE EXISTING CHANNEL THAT BISECTS THE GULLY AND DISCHARGES INTO THE WATER PROTECTION ORDINANCE BUFFER. THE LAND SLOPES STEEPLY FROM THE TOP OF THE GULLY DOWN TO THE CHANNEL. ADJACENT AREAS THE ADJACENT PROPERTIES ARE RESIDENTIALLY ZONED. NO OFFSITE DISTURBANCE IS PROPOSED WITH THIS PLAN. SOIL DESCRIPTIONS THE SOILS ARE CHARACTERIZED BY HAZEL AND ELIOAK LOAMY SOILS IN ACCORDANCE WITH THE NRCS SOILS REPORT. REFER TO SOILS REPORT IN SWM COMPUTATIONS BOOKLET. CRITICAL AREAS THERE ARE MANAGED SLOPES WITHIN THE LIMITS OF CONSTRUCTION. THE WATER PROTECTION ORDINANCE BUFFER IS ALSO LOCATED AT THE NORTHERN LIMITS OF CONSTRUCTION. EROSION AND SEDIMENT CONTROL MEASURES ALL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE CURRENT EDITION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, AND VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS. THE PERMITTEE OR THEIR AGENT AND/OR CONTRACTOR SHALL FAMILIARIZE THEMSELVES WITH ALL APPLICABLE PRACTICES CONTAINED THEREIN WHICH MAY BE PERTINENT TO THIS PROJECT. THE PURPOSE OF SUCH PRACTICES, INCLUDING BUT NOT LIMITED TO THOSE SHOWN ON THESE PLAN SHEETS, SHALL BE TO PRECLUDE ALL WATERBORNE OR AIRBORNE SEDIMENTS RESULTING FROM CONSTRUCTION ACTIVITIES FROM ENTERING ONTO ADJACENT PROPERTIES OR INTO STATE WATERS. ALL SEDIMENTS MUST BE CONFINED TO THE PROJECT SITE AT THE LOCATION(S) SHOWN ON THE PLANS. PROTECTION OF EXISTING NATURAL VEGETATION FROM NEEDLESS DISTURBANCE IS ESSENTIAL. ALL CONSTRUCTION PERSONNEL SHALL BE CAUTIONED TO AVOID DAMAGE TO EXISTING TREES AND VEGETATION DURING CONSTRUCTION ACTIVITIES. 3.02 - TEMPORARY CONSTRUCTION ENTRANCE (CE) A CONSTRUCTION ENTRANCE SHALL BE PROVIDED AT THE ENTRANCE OF THE PROJECT SITE TO PROVIDE A MEANS OF REMOVING SEDIMENT FROM THE TIRES OF CONSTRUCTION VEHICLES LEAVING THE WORK SITE. THE CONTRACTOR SHALL REMOVE ANY MUD FROM THE EXISTING ROAD SURFACE BY MEANS OF SWEEPING AND SHOVELING, IN THE EVENT THE WASH AREA IS NOT ADEQUATE IN SEDIMENT REMOVAL. 3.05 - SILT FENCE (SF) SILT FENCE IS TYPICALLY INSTALLED AS A FIRST STEP IN CONSTRUCTION ACTIVITIES. LOCATION AND DETAILS ARE SHOWN ON THE PLANS. 3.09 - DIVERSION DIKE (DD) A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED RIGHT-OF-WAY AND SIMILAR SLOPING AREAS. LOCATION AND DETAILS OF THE RIGHT OF WAY DIVERSION ARE SHOWN ON THE PLANS. 3.31 -TEMPORARY SEEDING (TS) TO THE MAXIMUM EXTENT POSSIBLE, TEMPORARY SEEDING SHALL BE APPLIED TO DENUDED AREAS THAT REMAIN DORMANT FOR 7 DAYS. SEEDED AREAS SHALL BE LIMED WHEN NECESSARY AT A RATE OF 2 TONS/ACRE, AND FERTILIZED AT A RATE OF 600 LBS/ACRE OF 10-20-10 (14 LBS. PER 1,000 SQUARE FEET) OR EQUIVALENT. CONTRACTOR SHALL SELECT TEMPORARY SEEDING PLANT MATERIALS FROM TABLE 3.31-B FROM THE VESCH. 3.32 - PERMANENT SEEDING (PS) A PERMANENT VEGETATIVE COVERING SHALL BE ESTABLISHED ON DISTURBED AREAS WITHIN 7 DAYS OF BEING BROUGHT TO FINAL GRADE AND THAT WILL NOT BE PAVED OR OTHERWISE BUILT UPON. CONTRACTOR TO SELECT THE PERMANENT SEEDING MIXTURE IN ACCORDANCE WITH THE SPECIFICATIONS IN THE VESCH. 3.35 - MULCHING (MU) ALL SEEDED AREAS SHALL BE MULCHED WITH STRAW IMMEDIATELY FOLLOWING SEEDING OPERATIONS. STRAW MULCH SHALL BE APPLIED AT A RATE OF 1.5 TO 2 TONS/ACRE. OTHER ALTERNATIVES MAY BE SELECTED FORM TABLE 3.35-A OF THE VESCH. 3.38 - TREE PROTECTION (TP) THE USE OF FENCING TO SERVE AS A VISUAL AND PHYSICAL BARRIER FOR THE EXISTING VEGETATION THAT IS TO REMAIN UNDISTURBED AS PART OF THIS PLAN. EROSION AND SEDIMENT CONTROL NOTES 1. THE CONSTRUCTION ACTIVITY OPERATOR OR HIS DESIGNEE, SHALL INSPECT ALL EROSION AND SEDIMENT CONTROL DEVICES IN ACCORDANCE WITH THE SCHEDULE PROVIDED IN THE GENERAL CONSTRUCTION PERMIT. IT IS RECOMMENDED THAT DEVICES BE CHECKED EACH DAY AND CERTAINLY AFTER EACH RAIN EVENT, AND THAT REPAIRS ARE MADE IMMEDIATELY AND AREAS ARE RE -SEEDED AND MULCHED AS APPROPRIATE. 2. ALL SEDIMENT -TRAPPING DEVICES AND FENCES SHALL BE CLEANED OUT AT 50 PERCENT CAPACITY OR HEIGHT, AND SEDIMENT SHALL BE DISPOSED OF BY PUMPING INTO A SILT -SACK OR OTHER APPROVED MEANS. 3. GRAVEL OUTLETS SHALL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP AND BE CLEANED WHEN SEDIMENT IS VISIBLY CLOGGING THE VOID SPACES. 4. DIVERSIONS SHALL BE CHECKED TO ENSURE PROPER RE-ROUTING OF DRAINAGE. DAMAGES THAT INTERRUPT THE EFFECTIVE FUNCTIONING OF THE DIVERSION SHALL BE REPAIRED IMMEDIATELY. 5. ALL SEEDED AREAS SHALL BE INSPECTED REGULARLY TO ENSURE THAT A VEGETATIVE COVER IS BEING ESTABLISHED. IN THE EVENT THAT THE SEEDING DOES NOT TAKE, CONTRACTOR TO TROUBLESHOOT AND TAKE REMEDIAL ACTION UNTIL THE APPROPRIATE VEGETATIVE COVER IS ESTABLISHED. 6. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 7. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE ALBEMARLE COUNTY E&S INSPECTOR. 8. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 9. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 10. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS FOR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 11. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 12. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 13. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. EROSION AND SEDIMENT CONTROL MINIMUM STANDARDS (PER 9VAC25-840-40) 1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS, OR 7 DAYS IF REQUESTED BY THE LOCAL INSPECTOR. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCK PILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. 3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. 4. SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. 6. SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN. A. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES. B. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN DURING A 25-YEAR STORM OF 24-HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED. 7. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. 8. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. 9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. 10. ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT. 11. BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL. 12. WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST EXTENT POSSIBLE DURING CONSTRUCTION. NONERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF ARMORED BY NONERODIBLE COVER MATERIALS. 13. WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX-MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF NONERODIBLE MATERIAL SHALL BE PROVIDED. 14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET. 15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED. 16. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA: A. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME. B. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. C. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFF -SITE PROPERTY. D. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE STABILIZATION. E. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THIS CHAPTER. F. APPLICABLE SAFETY REQUIREMENTS SHALL BE COMPLIED WITH. 17. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES. 18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE VESCP AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 19. PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE SPECIFICATIONS PROVIDED IN THE PLANS. STREAM RESTORATION AND RELOCATION PROJECTS THAT INCORPORATE NATURAL CHANNEL DESIGN CONCEPTS ARE NOT MAN-MADE CHANNELS AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS. THE SITE COMPLIES WITH MS-19 CHANNEL PROTECTION CRITERIA BY MEETING THE ENERGY BALANCE CRITERIA FOR THE 1-YEAR DESIGN STORM. THE SITE COMPLIES WITH MS-19 FLOOD PROTECTION CRITERIA BY REDUCING THE 10-YEAR PEAK FLOW TO BELOW PRE -DEVELOPMENT LEVELS. CONSTRUCTION PHASING NARRATIVE: ANTICIPATED START DATE: MARCH 2O22 ANTICIPATED COMPLETION DATE: MAY 2022 PHASE 1 1. INSTALL CONSTRUCTION ENTRANCE AS SHOWN ON PLANS. 2. INSTALL SAFETY FENCE AND SILT FENCE ALONG PERIMETER OF LIMITS OF DISTURBANCE AS SHOWN ON THE PLANS. 3. INSTALL STORM SEWER PIPE SO THAT CHANNEL FLOW FROM UPSTREAM STORM SEWER CAN BE DIVERTED TO NEW STORM SEWER PIPE AND FLOW THROUGH THE PROJECT AREA WITHOUT MIXING WITH CONSTRUCTION RUNOFF. 4. INSTALL OUTLET PROTECTION BELOW STRUCTURE 1. 5. CONSTRUCT SEDIMENT TRAP. BLOCK ORIFICE OPENING IN STRUCTURE 2A. ENSURE 2'-WIDE OPENING IN STRUCTURE 2 IS OPERATIONAL EXCAVATED MATERIAL CAN BE USED FOR THE POND EMBANKMENT AND EXCESS CAN BE PLACED UPSTREAM OF THE POND SO LONG AS POSITIVE DRAINAGE IS MAINTAINED. 6. UPON PERMISSION OF THE ALBEMARLE COUNTY EROSION AND SEDIMENT CONTROL INSPECTOR, MOVE TO PHASE 2 CONSTRUCTION. PHASE 2 1. BEGIN CLEAN EARTH FILL OPERATIONS IN MAXIMUM 24-INCH LIFTS UNTIL DESIGN GRADES HAVE BEEN ACHIEVED. 2. ALWAYS MAINTAIN POSITIVE FLOW TO THE SEDIMENT TRAP. 3. PERMANENTLY STABILIZE ALL DISTURBED AREAS WITH PERMANENT SEEDING AND MULCH. 4. CONVERT SEDIMENT TRAP TO PERMANENT SWM FACILITY BY REMOVING PLUG AT STRUCTURE 2A AND PROVIDE TRASH RACK AROUND ORIFICE OPENING. 5. ONLY REMOVE EROSION AND SEDIMENT CONTROL MEASURES FOLLOWING PERMANENT STABILIZATION AND WITH THE PERMISSION OF THE ALBEMARLE COUNTY E&S INSPECTOR. Site Results (Water Quality Compliance) Area Checks FOREST/OPEN SPACE (ac) IMPERVIOUS COVER ac IMPERVIOUS COVER TREATED (ac) MANAGED TURF AREA (ac) MANAGED TURF AREA TREATED (ac) AREA CHECK D.A. A D.A. B D.A. C DA D AREA CHECK 1 II 1 11 • 11 1 11 � 1 r 1 1 11 1 11 1 11 �, Ske Treatment -Volume (ft3) 97s Runoff Reduction Volume and TP By Drainage Area RUNOFF REDUCTION VOLUME ACHIEVED (ft', TP LOAD AVAILABLE FOR REMOVAL (Ib/yr TP LOAD REDUCTION ACHIEVED (lb/yr TPLOADREMAINING (lb/yr NITROGEN LOAD REDUCTION ACIIUEVED (lb/Vr r0' 00000' Total Phosphorus FINAL POST4XVELOPMENT TP LOAD pb/yr 0.61 TP LOAD REDUCTION REQUIRED (1b/yr 0.20 TP LOAD REDUCTION ACHIEVED (lb/yr 0.09 TP LOAD REMAINING (lb/yr) 0.52 REMAINING TP LOAD REDUCTION REQUIRED (Ib/yr): 0.11 Total Nitrogen (For Information Purposes) POST -DEVELOPMENT LOAD (lb/yr), 4 40 NITROGEN LOAD REDUCTION ACHIEVED (Ib/yr) 0Z REMAINING POST -DEVELOPMENT NITROGEN LOAD (Ib/yr) 3.96 VRRM SITE RESULTS SHEET /\ 2EVIRGMA NUTRIENT BANK P.O. Box 142 Penn Laird, VA 22846 (540)2174079 1lreimaNnInct Mink.com December 23, 2021 Michael Myers, PE, CFM 30 Scale, LLC 871 Justin Drive Palmyra, VA 22963 Re: Nutrient Credit Availability - Southwood - Northern Area Wedge - Site Plan Mr. Myers, The Virginia Nutrient Bank (VNB) is pleased to confirm availability Q,g}t pounds per year of phosphorus offsets (nutrient credits) for the Southwood - Northern Area Wedge site plan located at a portion of Tax Map 90A1-ID at the intersection of Bittemut Lane, Fin Court and Iris Court in Albemarle County. The project drains to ITUC: 02080204. VNB has approval from the Virginia Department of Environmental Quality (VDEQ) for Nonpoint Source Offset Generation Certification. VNB is approved to transfer nutrient credits in accordance with the Chesapeake Bay Watershed Nutrient Credit Exchange Program (VA Code 62.1-44.19:14 et seq). These offsets are also transferable in accordance with the Virginia stotmwater offset program (VA Code 62.1- 44.15:35) and the Virginia Soil and Water Conservation Board's Guidance Document on Stormwater Nonpoint Nutrient Offsets approved on July 23, 2009, to those regulator entities qualifying for nutrient offsets. VNB is managing the Upper lames Nutrient Bank in Nelson County that will generate approximately 155.31 pounds of phosphorus reduction and roughly 555.15 pounds of nitrogen reduction per year within the 02080203 HUC. VNB will retire 0.43f pounds of phosphorus credits and corresponding nitrogen credits from the Upper James Nutrient Bank in accordance with the Nutrient Offset Certification regulations. Respectfully, 6 \-b0^-Z- Gordon D. Weirich Virginia Nutrient Bank, LLC gordon@virginianutrientbank.com 1 540-217-4079 NUTRIENT CREDIT AVAILABILITY LETTER NARRATIVE ON NUTRIENT CREDIT PURCHASE ON THE FIRST SUBMISSION OF THE VSMP PLAN, THE VRRM SPREADSHEET HAD INCLUDED THE ENTIRE 2.33-ACRE DRAINAGE AREA AS THE SITE AREA. ON THE 2ND SUBMISSION (2/9/2022), THE VRRM SPREADSHEET HAS BEEN REVISED TO INCLUDE ONLY THE 1.01-ACRE DISTURBED AREA AS THE SITE AREA. AS A RESULT, THE SUPPLEMENTAL NUTRIENT CREDITS TO BE PURCHASED ARE 0.18 LBS/YEAR. NOTE: REFER TO STORMWATER MANAGEMENT NARRATIVE ON SHEET 10 FOR DESCRIPTION OF WATER QUANTITY AND WATER QUALITY CONTROL. REFER TO HYDROLOGIC AND HYDRAULIC CALCULATIONS BOOKLET FOR COMPLETE VRRM REDEVELOPMENT SPREADSHEETS. REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 © 2022 - 30 SCALE, LLC SMSCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE 967 2ND ST SE CHARLOTTESVILLE, VA 22903 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30sGale.com Qz W (D D_ > Q Z 7 W V I Z w / W m Q�� 0 OZ W Z Z � Q 1 Z a Q Q CO J W O r'_ 0. Z O O Z CD M N a_ Z _ OJ o0� J 0 O > H LL _O H 2 W 0 IL U W �2 w~ >Q Q IY O W Z �/ , , w w J v J J UU sheet title: EROSION AN[ SEDIMENT CONTROL NARRATIVE scale: AS SHOWN date: 12/23/2021 sheet # 9 OF 11 V ZUZZ - JU JGALt, LLG m �I �y\b vIIIIIIII yX I I / \v � // ll l I ii l / ll� VIIIII IIIIIIv 1vIvll yvvvv\v� ]1 I i \ / full III illl\liIlill \\\\ 2713 POINT OF \\\\\\ I \ O I II\ PRE ANALYSIS \\\, l \ CN=66 o I I I I;II►II N�\\fir\J��\ CHANNEL FLOWL=658 FT ` o / t 27Cj \//�\\ ��\ \ \1 I\ I I -- I \ "OFFSITE" DA \ \ \ \\\\\\ _ - - \ \ \ i/ A=3.95 AC. \ \ w CN=74 \V\\ - -�\ \\\ \\ \11 I I \ \\\\ \ 278� � IIIIII I 79 kk \\� SHALLOW \\\\\\ IIIII CONCENTRATED 89Q T\11�VI1 \\ SHEET FLOW *> \ \ \\\\\ L S S=8.0%- a 1 I \) ' / \ ELEV=489.5 PRE -DEVELOPMENT DRAINAGE MAP SCALE: 1 "=50' STORMWATER MANAGEMENT FLOOD PROTECTION NARRATIVE FLOOD PROTECTION IS MET BY COMPLIANCE WITH 9VAC25-870-66(C)2B. THE PEAK 10-YEAR, 24-HOUR (10% AEP) COMBINED DEVELOPED DISCHARGE RATE HAS BEEN REDUCED TO FOLLOWING THE CLEAN EARTH FILL OPERATIONS, RUNOFF FROM BE LESS THAN THE PRE -DEVELOPMENT 10-YEAR, 24-HOUR THE FILL AREA WILL FLOW OVERLAND THE EXTENDED DISCHARGE RATE FOR THE ENTIRE 6.28-ACRE DRAINAGE AREA TO DETENTION POND (LEVEL ONE). THE EXISTING RUNOFF FROM THE THE POINT OF ANALYSIS. THE FOLLOWING PEAK RATES ARE TAKEN STORM SEWER ON BITTERNUT LANE WILL CONTINUE TO FLOW VIA FROM THE HYDRAULIC AND HYDROLOGIC COMPUTATIONS BOOKLET. STORM SEWER PIPE TO RIP -RAP OUTLET PROTECTION BEFORE ENTERING THE WATER PROTECTION ORDINANCE BUFFER. Q10 PRE -DEVELOPED = 25.5 CFS Q10 POST DEVELOPED = 17.8 CFS CHANNEL PROTECTION WATER QUALITY COMPLIANCE NARRATIVE CHANNEL PROTECTION IS MET BY COMPLYING WITH 9VAC25-870-66(B)1 b. THE PEAK 1-YEAR, 24-HOUR DEVELOPED WATER QUALITY WILL BE MET BY THE EXTENDED DETENTION POND DISCHARGE RATE IS LESS THAN THE MAXIMUM ALLOWABLE RUNOFF (LEVEL ONE) AND THE PURCHASING OF NUTRIENT CREDITS. A RATE FOR CONCENTRATED DISCHARGE USING THE ENERGY LETTER OF AVAILABILITY HAS BEEN PROVIDED ON SHEET 9 OF THE BALANCE CRITERIA. REFER TO ENERGY BALANCE SUMMARY ON SITE PLAN FOR 0.43 LBS/YR OF SUPPLEMENTAL PHOSPHORUS THIS SHEET AND HYDRAULIC AND HYDROLOGIC COMPUTATIONS REMOVAL. HOWEVER, THE APPLICANT WILL ONLY NEED TO BOOKLET FOR SUPPORTING CALCULATIONS. PURCHASE 0.11 LBS/YR TO COMPLY WITH THE VRRM REQUIREMENTS. Q1 MAXIMUM ALLOWABLE RUNOFF = 1.36 CFS Q1 POST -DEVELOPED = 0.67 CFS OK ��\ \ \ \ \\ 11 \\ � - I 1 I ' I � I I I �\�\�•\\I \\•\\' ' ''' '� \=_- = � \�\\� �y � / / ► � I I � / I�;1 \`��vv�v�� � IIIIIII IIIv�vv\v\\ vvvv�vvv IIIIIII I ll vll\ ]1 IIIII vVA\V\\\ llllIIIII \\\\ 276 � i\\ �//,, , I � • �, �/ p it / �Illlllilllll( \\\\ POINT OF I� I I / k I \ \ 0 )IIII ( PosT DEv ANALYSIS 111 \\� I I �I�IIII�III \ \ \\\ l \ I / DA=2.33 AC. CN=69 - /,//,/ ,\ \\ \_ \�� / \ , o I I I I;II►II �,\\fir\J\\ •. EXTENDED -DETENTION ELEV=431.0 I POND (LEVEL ONE) L=642 FT S=6.4% I�IIIIII 4�_ P7• I 'v "OFFSITE" DA E \ ./%_\ _ i/ A=3.95 AC. \\ \ `e� %,� - his _ "\ \ 1 CN=74 \\ / \ e\ `\\\ ,"✓ \\1 77, 11 �II \27B I11Il�lllj�lll \�- \ I III I <,\\ \ \ i �IIIIIIIII� r \\\ \\\ \\ 0.92-AC ARE CONVERTED \ \� FROM FOREST/OPEN 11 i I I SPACE TO MANAGED TURF \\AAA- '�\ 1\ I IIII I CONCENTRATED 890W \ ELEV=472.0 \ \ \\ \ \ \ \\gw\\, l \ S=10.7% / \ 1\\\\\�\\\ SHEET FLOW � \ \ \\\\ L-100 FT \ S=8.0% w- _ 0 50 100 SCALE: 1 "=50' ENERGY BALANCE SUMMARY CALCULATIONS FOR 1-YEAR, 24-HOUR DESIGN STORM: Q(DEV) <= I.F. * (Q(PRE) * RV(PRE)) / RV(DEV) WHERE: I.F. = IMPROVEMENT FACTOR (0.8 FOR SITES > 1.0 AC) Q(PRE) 2.08 CFS RV(PRE) 4,510 CF RV(DEV) 5,524 CF Q(DEV) MAXIMUM ALLOWABLE 1.36 CFS Q(DEV) PROPOSED 0.67 CFS OK POST -DEVELOPMENT DRAINAGE MAP SCALE: 1 "=50' DCR BMP SPEC 15 COMPLIANCE NARRATIVE THE PROPOSED POND COMPLIES WITH THE EXTENDED DETENTION (ED) POND (LEVEL ONE) CRITERIA IN TABLE 15-3 FROM DCR BMP SPECIFICATION 15: 1. Tv = (0.0) (Rv) (A)) /12, Tv = 1.0 X 0.27 X 1.01 / 12 = .022725 AC -FT = 990 CF Tv PROVIDED = 1,323 CF @ ELEV. = 440.84 OK 2. MINIMUM 15% OF THE Tv IN THE FOREBAY 15% * 990 CF = 149 CF FOREBAY VOLUME = 158 CF @ ELEV = 442.0 OK 3. LENGTH/WIDTH RATION 2:1 OR MORE, AND NO SHORT CIRCUITING LENGTH = 78 FEET, WIDTH (AVG) = 33 FEET, L:W = 2.4 OK SHORTEST FLOW PATH - N/A SINCE +- 95% OF THE TREATED VOLUME FLOWS ALONG THE LENGTH OF THE POND. THERE IS NO SIGNIFICANT SHORT CIRCUITING BASED ON THE TOPOGRAPHY OF THE VALLEY. OK 4. AVERAGE Tv ED TIME = 24 HOURS OR LESS AVERAGE Tv ED TIME < 24 HOURS. OK ALSO NOTE THE ORIFICE DIAMETER HAS BEEN SIZED AT 4", WHICH IS ABOUT AS SMALL OF A DIAMETER AS PRACTICAL. 5. VERTICAL Tv ED FLUCTUATION MAY EXCEED 4 FEET. THE VERTICAL Tv ED FLUCTUATION IS < 3 FEET. OK 6. TURF COVER ON FLOOR REFER TO SHEET 11 FOR LANDSCAPE PLAN INDICATING TURF COVER. OK REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 DISCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILLE 967 2ND ST SE CHARLOTTESVILLE, VA 22903 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30sGale.com sheet title: STORMWATE MANAGEMEN PLAN scale: 1 "=50' date: 12/23/2021 sheet # 10 OF 11 SWM OPERATIONS AND MAINTENANCE CHECKLIST © 2022 - 30 LLC Virginia Stormwater Management Handbook, Chapter 9 July 2013 9-C.16.0. EXTENDED DETENTION PONDS: O&M CHECKLIST Inspection Date Project Site Plan/Permit Number Location Date Bill Placed in Service Date of Last Inspection Inspector Owner/Owner's Representative As -Built Plans available: Y / N Facility Type: Level 1 Pond characteristics and functions (check all that apply) ❑ Water quality treatment ❑ Channel protection ❑ Ties into groundwater Hydraulic Configuration: ❑ On-line facility ❑ Off-line facility Level 2 Type of Pre -Treatment Facility: El Sediment forebay (above ground) ❑ Vegetated buffer area ❑ Grass filter strip ❑ Grass channel ❑ Other: Ideally, Extended Detention Ponds should be inspected annually. ED Ponds are prone to a high clogging risk at the ED low -flow orifice. Ideally, the orifice should be inspected at least twice a year after initial construction. The constantly changing water levels in ED Ponds make it difficult to mow or manage vegetative growth. The bottom of ED Ponds often become soggy, and water -loving tees such as willows may invade and will need to be managed. Periodic mowing of the stormwater buffer is only required along maintenance rights -of -way and the embankment. The remaining buffer may be managed as a meadow (mowing every other year) or forest. Frequent removal of sediment from the forebay (every 5-7 years, or when 50% of the forebay capacity is filled) is essential to maintain the function and performance of the ED Pond. Sediments excavated from ED Ponds are usually not considered toxic or hazardous, so they can be safely disposed of either by land application of land filling. Z ? Z Element of a a Who Will BMP Potential Problem m 5 d How to Fix Problem Address Comments Problem o �, ycc 0- c X Adequate vegetation Supplement as needed. Owner There is excessive Remove immediately. Owner or hash and debris professional Contributing There is evidence of Owner or Drainage Area erosino and/or bare or Stabilize immediately. processional exposed soil There is excessive Owner or landscape waste and Remove immediately. professional and clippincts There is adequate Professional access to the pre- Establish adequate access and. perhaps, treatment facility the locality There is excessive Remove immediately. Owner or Pre -Treatment trash and debris professional There is evidence of Immediately identify and erosion and/or correct the cause of the Owner or exposed soil. erosion and stabilize the professional eroded or bare area. Dredge the sediment to Sediment deposits restore the design capacity; are 50% or more of sediment should be dredged Professional forebay capacity. from forebays at least every 5-7 years, and earlier, as needed. The sediment marker Adjust the sediment depth Pre -Treatment is not vertical. marker to a vertical Professional (continued) alignment Clear blockages of the riser There is evidence of or orifice(s) and make other clogging adjustments needed to meet Professional the approved design specifications There is dead Revegetate, as needed Owner or ve elation professional The inlet provides a Stabilize immediately, as Owner stable conveyance needed, and Gear professional into the pond blockages. There is excessive Owner trash, debris, or Remove immediately professional sediment. There is evidence of Repair erosion damage and Owner or erosion/undercutting restabilize professional at or around the inlet There is cracking, bulging. erosion or Repair and restabilize Professional sloughing of the immediately. Inlet forebay dam. There is woody Remove within 2 weeks of growth on the forebay discovery. Professional dam. Animal burrows must be There is evidence of backfilled and compacted. nuisance animals. Burrowing animals should be Professional humanely removed from the area. There is more than 1 Add fill material and compact Owner or inch of settlement. the soil to the design grade Professional The Inlet alignment is Correctimmediately. Owner or incorrect. Professional Determine if existing plant Plant composition is materials are consistent with consistent with the the general Wet Pond design Professional approved plans criteria, and replace inconsistent species. Invasive species are Remove invasive species present, immediately and replace Professional vegetation as needed. Vegetation Trees planted in the Consider watering every 3 _ buffer and an wetland days for first month, and Islands and then weekly during first year Owner or peninsulas need (April - October), depending Professional watering the on rainfall. firs[ rowinno sseeason %low (at least twice a year) Grass around the :a a height of4"-9' high and Owner or facility is overgrown emove grass clippings. professional Virginia Stormwater Management Handbook, Chapter 9 .July 2013 Z ? Z y } r Element of a m ti Who Will BMP Potential Problem rn d How to Fix Problem Address Comments Problem o d d a c c Vegetation Vegetation is dead or Remove and replace dead or (continued) reinforcement planting dying vegetation. Professional is needed. There is excessive Remove immediately Owner or trash and/or debris. professional There is evidence of Repair and stabilize physical sparse vegetative damage. and reseed or plant Owner or cover, erosion or additional vegetation. professional Permanent Pool slumping side slopes, Animal burrows must be and Side Slopes There is evidence of backfilled and compacted. Owner or nuisance animals. Burrowing animals should be professional humanely removed frm area. There is significant Conduct a bathymetric study sediment to determine the impact to Professional accumulaticn. design volumes• and dredge if necessary. There is adequate Professional access to the riser for Establish adequate access and, perhaps. maintenance. the locality Pieces of the riser are deteriorating, misaligned. broken or Repair Immediately. Professional missing. Adjustable control valves are accessible Repair. as needed. Professional Riser/Principle and operational. Reverse -slope pipes Spillway and Low -Flow and flashboard risers Repair, as needed. Professional Orifice(s) are in good condition. See a e into conduit Seal conduit Professional Clear blockages of the riser There is evidence of or orill and make other Professional clogging adjustments needed to meet the approved design specs - There is excessive trash, debris, or other Remove immediately. Owner or obstructions in the professional trash rack. There is sparse veg. cover, settlement, Repair and restabilize cracking, bulging, Immediately, especially after Professional misalignment, erosion major storms. rills deeper than 2 inches or slou hin . There are soft spots, Reinforce, fill and stabilize seepage, boggy areas immediately. Dam? or sinkholes. Animal burrows must be Embankment and Abutments There is evidence of backfilled and compacted. nuisance animals. Burrowing animals should be humanely removed from the area. Removal of woody species There is woody near or on the embankment vegetation on the and maintenance access embankment areas should be done when discovered, but at least every 2 years - Removal of woody species There is woody near or on the emergency Owner or growth on the spillway should be done professional spillway, when discovered, but at least every 2 years. There is excessive Owner or OverflowlEmer trash, debris, or other Remove immediately. professional gency Spillway obstructions. There is evidence of Repair erosion damage and Owner or erosion/backcufting reseed professional There are soft spots, Reinforce, fill and stabilize Owner or seepage or sinkholes. immediately. professional Only one layer of Reinforce rip -rap or other stone armoring exists armoring materials, Professional above the native soil. The outlet provides a Stabilize immediately, as Owner or stable conveyance needed, and clear professional from the pond. blockages- There is woody Prune vegetation back to Owner or growth within 5 feet of leave a clear discharge area. Professional the outlet pipe barrel. There is excessive Owner or Outlet Uash, debris, or other Remove immediately. professional obstructions. There are excessive sediment deposits at Remove sediment. Professional the outlet. Discharge Is causing Repair, reinforce or replace undercutting, erosion rip rap as needed. and Professional or displaced rip -rap at restabilize. or around the outlet. Establish adequate access. Access to the facility Remove woody vegetation Professional or its components is and s that may block and, perhaps, adequate. access.ss. Ensure that the locality hardware can be opened and operated. Collapsed fences must be Fences are restored to an upright Inadequate position. Jagged edges and Professional damaged fences must be repaired or replaced. Water levels in one or Clear blockages of the riser more cells are or orifice(s) and make other Overall abnormally high or adjustments needed to meet Professional low the approved design specifications, Complaints from local Correct real problems. Owner or residents professional Eliminate stagnant pools and stock the basin with mosquito fish to provide natural mosquito & midge Mosquito proliferation control. Treat for mosquitoes Owner or as needed. If spraying, then professional use mosquito larvicide, (e.g., Bacillus thurendensis or Altoside formulations) only if absolutely necessary Encroachment on the Inform involved properly Owner or pond or easement by owners of BMPs status: professional overall buildings or other clearly mark the boundaries (and perhaps (continued) structures of the receiving pervious the locality) area, as needed Safety signage is not Provide sufficient, legible Owner or adequate. 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SW -DR / "+ j III IIII l 3:1 IIII( Ora• .r. / � I GR AC ESS / RdAD h J2. 430- -43.5 -43.5- / f 8.l I; +ai 11lqu1cr\!L_ IYME, T/ I I 3 ) 7• I II�IIII �1�/� j I IiJ 1't l 1 f loll ro P VIDE N RMAL C OWN If1T INLET #7 POND GRADING DETAIL AND LANDSCAPE PLAN LEGEND SCALE: V=10' a; 1 .7-.] USE "GENERAL SLOPE" PERMANENT SEEDING MIX PER TABLE 3.32-D OF THE VESCHB (SEE SHEET 8) TO ESTABLISH TURF COVER 0 10 20 SCALE: 1 "=10' DCR LANDSCAPE PLAN COMPLIANCE NARRATIVE IN ACCORDANCE WITH DCR STORMWATER DESIGN SPECIFICATION NO. 15, TABLE 15.3 - EXTENDED DETENTION (ED) POND CRITERIA, THE LANDSCAPING REQUIREMENT FOR A ":LEVEL ONE" ED POND FACILITY IS TO PROVIDE TURF COVER OVER THE POND FLOOR. THE PERMANENT SEEDING SHALL EXTEND ACROSS THE UPSTREAM AND DOWNSTREAM FACES OF THE DAM. NO SHRUB OR TREE PLANTING IS ALLOWED WITHIN 25 FEET OF THE EMBANKMENT. REVISIONS # DESCRIPTION DATE 1 COUNTY COMMENTS 02/09/2022 EMSCALE ENGINEERING owner: HABITAT FOR HUMANITY OF GREATER CHARLOTTESVILL 967 2ND ST SE CHARLOTTESVILLE, VA 2290; engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com w Q I MW 2 r� O Z I Z nJ J 2 W Z W J CU I— Z LU CI LU Q Z J d 0- N O U.]o Z o Q O O) Z N i1 O> Z _O U W H a W Q S sheet title: LANDSCAPE PLAN, POND GRADING DETAIL AND MAINTENANCE scale: NONE date: 12/23/2021 sheet # 11 OF 11 F U f- ro 0 J Q W w CO CO C� Q w J J F- F O U rn