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HomeMy WebLinkAboutWPO201900062 Plan - VSMP 2021-12-30@ 2021 - 30 SCALE, 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 ESS 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 SWIM 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 SOUTHWOOD -PHASE 1 CLEAN EARTH FILL PLAN -NORTH AREA WATER PROTECTOIN ORDINANCE (WPO) PLAN AMENDMENT WPO 2019-00062 TMP 90A1-1 D SCOTTSVILLE MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA SYMBOLS EXISTING PROPOSED GRASS DITCH LINING PER VESCH 3.32 VDOT STD. EC-3 DITCH LINING 0 --498-- —12— CONTOUR LINE WITH ELEVATION 12 STORM SEWER STRUCTURE IDENTIFIER OS SANITARY SEWER STRUCTURE IDENTIFIER BENCHMARK, TEST PIT MANHOLE WITH FRAME AND COVER + 65 7 + 645 7 SPOT ELEVATION (� ADA PARKING SYMBOL WATER CROCK/METER �f FIRE HYDRANT o • WATER VALVE — WATERMAIN - SANITARY SEWER MAIN m STORM SEWER —__— PROPERTY LINE/RIGHT-OF-WAY LINE _— CENTER LINE FENCE LINE EASEMENT LINE i CITY LIMITSNCO Q ti ti � c') O 5TH ST AA BROSE MMONS DR SITE J� HICKORY STREET �S OQO O�y�O�gJ�6�o1 N VICINITY MAP SCALE: 1 "=2000' WATERSHED DATA: • LIMITS OF DISTURBANCE (LOD) = 1.16 AC. (THIS PLAN) • TOTAL LIMITS OF DISTURBANCE (WPO 2019-00062) = 16.84 AC. • INCREASE IN IMPERVIOUS AREA = NONE • CONVERSION OF FOREST/OPEN SPACE TO MANAGED TURF=1.06 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 CROSS -SECTIONS 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 STORMWATER MANAGEMENT MAINTENANCE CHECKLIST PROPERTY INFORMATION TAX MAP AND PARCEL: PORTION OF TMP 90A1-1 D OWNER/DEVELOPER: SOUTHWOOD CHARLOTTESVILLE, LLC SITE AREA: 1.16 AC. TOPOGRAPHIC SURVEY LINCOLN SURVEYING 11-23-2021 HORIZONTAL DATUM: NAD 1983, VA SOUTH DATUM: 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 CLEAN EARTH FILL (ALLOWED BY -RIGHT PROPOSED USE: PER Z.O. 4.3.1 SUBJECT TO 5.1.28) REVISIONS # DESCRIPTION DATE ODISCALE 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 a z W F W Z 7 U w W LLI co n/ 0 o a OZ W ZQ � Z d i Z Q Q J aC'4 W 00 o r OQ0- Z i o O J J Z o0 N >� 0_ Z 0 2 W H 0 U WW � LO � Q O Z Lu w rn Q w W J J JF- U) CU U (mim �✓MI L —F.-MYFles v Lic. No. 33028 12/23/2021 0NAL E�O� sheet title: COVER SHEET scale: AS SHOWN date: 12/23/2021 I sheet # 1 OF 11 2021 - 30 LLC RVED�S PR\\ \\\\\ \ \\\C\` PL\S ERALBEMOPCOUNTY Gl� dRESERPIGLBE4APCOUI EXI �L pj��� I \\ —432 \\\ \ ` `\ \ \\•\ ✓\/// 11 / SA - r — / / , � / � � / � / � / / 1 I � �� I I I I� I ► r .",,,,,r= , �I� 2.O�RW— � i � .\ �\ �vl I� / / _/_//w — —/ — �//"— //�— /—i —/ / / �//�/ � / ,//w / I' /' //' '�/w�� i\/ —EFX A/N/ P�N/. p�/i� / /////w�/�/�/� / / / ��/w / / �w�/I �/ �/ // ,Iw/I ,/� / IIi / / Mp# II N/ / / //1 I I II I /// ,/I r,�I/ /\ // i ��'/-'' �/I �/I Ij jIIjlII/� ���,I 7 /'/1I / 1/I II /`�//�/�I'j��/ /% �I�/IQ, ,IQ�// �//• QQ/ '/l / �/ ."SA/N� //�M��H( �//(\I P' \a\ IV\JI \1 /E/) 27GZ OPC=417E'AN MH TVP VOU478.08W/A/TE \PlR\O1 \TEC\�T'14I-A /'UFF / \\��\\\• ED \ \ ON\E2\ y\ `\ORD PS0" 76 1 /L IL 429.57 AO \ \\\ ^ /z°�,/��✓ / / / / ... i I ► \� ��AL / ANAGEDSLOP�S PERCOU% COUNTY GISg\�N°ME OBIUSHOE BILE HOME �/ \\ / --- i / PANl—"'��1,- A50�L\/�'LeY /� a72•t �\ � \ % ,ICI SANMH( T�j \\ \ 0 \\\\ WIRE FENCE -- / / / A5 / / / // -�\ N B`\ IRV-43k46 \ \\ \ \ \ // VEL E4IST A MH (PRIVATE) / / -r� �1( / / /Q' S� ���\ / / /� qq3� // EX G� NLOP46a4sI8 V P N IN=464 7(1N) // 'r< -Q�� Q( / / / y � \ \�\\\\ Z' \\ "V P N IN= 64.90(E) T / 'h— n—�^//�j / aQ/Q 6v8n�'�f� E„ E,4a \ /� ��'� I 18"�/ IN .O T64.22(N) �468.92/�j�as��—��/'j//JY/ /a �e L\//�(/E //�=� ja5o\ \\ \ \ I I { -� -- //// ry//�� / NOTES: 1) EXISTING TOPOGRAPHY WITHIN THE LIMITS OF CONSTRUCTION IS qq�\ \ 21. VERTICAL DATUM NAVY 19OLNSCONTOUR INTERVAL _ \ 4 _ \ BASED ON A TOPOGRAPHIC FIELD SURVEY BY LINCOLN SURVEYING G \_ S /� _ _ _ / — — DATED 11 23. 88 I �\\�! � / EFF,R€NEE" — � � � � \ \ \ '�So\ \ IS ONE FOOT. °� \ i \\\ � '- � — E5 � — � � � � � � � // //f�LAGS _ � — � _ — � � ` \ \ \ � \ \ \ 1 2) EXISTING TOPOGRAPHY OUTSIDE OF THE LIMITS OF CONSTRUCTION ISTIiy� �QI\ \ �E4 _ \ \ _ — — / �/ Y W3SI — — — \ \ z IS BASED ON ORIGINAL AERIAL SURVEY OF THE SOUTHWOOD \ \ \ \I \ Drr �(\\� \ a6p / / /, \ \ \ \ \ \\ \ \ \ TRAILER PARK PROPERTY PERFORMED BY ROUDABUSH GALE & RV- 1\ \ 'se \� \\ — 464 / / / / aT59� =\ \ \ \ \ \ \ ) ASSOCIATES. 3 THERE ARE NO JURISDICTIONAL WATERS OF THE US WITHIN THE LIMITS OF CONSTRUCTION AS VERIFIED IN THE FIELD WITH THE US \ \ \ \ \ \L_ = 455— \ \ \ / / / / / / / #780 — — — —457\ \ \ \\ \ 1 \ \ \ \ ARMY CORPS OF ENGINEERS (USACOE) ON DECEMBER 2, 2021 AND 'Q — --- \ \ \ A52 / \ ` VERIFIED BY CORRESPONDENCE FROM THE USACOE DATED \� /\\\ MOBILE HOME \ \ \ \ \ \ I \ \ DECEMBER 8, 2021. REFER TO SWM BOOKLET FOR \\ \ \ \ L \ \\ ^�� \��� = — — \ / CORRESPONDENCE. \ \ \ a >� lL 1 a --r — _ — — \ \ \ �/ / / \ \ \ 1 I I I I \ \ \ 4) MANAGED SLOPES SHOWN HEREON ARE BASED ON ALBEMARLE \ \\ \ \� \ \� \` %� �/\ �i �` \\ --SEXIST �G0' / / — — — \ \ I 1 1 \ I I I 1 OF CONSTRUCTION. COUNTY GIS. E ARE NO PRESERVED SLOPES WITHIN THE LIMITS \ EXISTING STO DI � � \ \ \ I 1 \ \\ \ \ \\ \\ M"RCPINH LID P=468. 9 \ \ .yam \ \ �0 i' ---�\�a56 278 \\\ \ I I I I I I I 1 \ 15" RCP INV OUT 63.28 \ / \ I I I r-- 462— TP STEEP SLOPES \ \ I \, \ \\\� T'_ \ °e/!B \ \ I I I I i LEGEND SOILS LEGEND EL8Q PAAN LL / / yO2�� \ �/ I I I I I I I I I ; MANAGED SLOPES BSOILS TYPE OUNDARY 27C NRCS SOILS TYPE EX. ACE � D e9 \ � \ \ ✓ I / �' OUTHW OD I I I I I I PRESERVED SLOPES WI FENC \ \ / / 4 I I I I OFC B \ \ \ — / i CHARLTTESV, LE, LLr I I TM 90A 1- 1 D I I I I I I StINGSANM MH \\ 4�9,57 ,� ZINE: —2 ABBREVIATIONS \ \ ' 6"•VCP_INV. IN=46 .53 ( \ MO �# CO CLEANOUT -8 V INV INVERT -V NP\ U 65.�\7 (E)\ \ \ \ Ayl, + O \\ \ \ \ e�lF ` JE\ �/ \ \ ( / 1 \ \ �\ \ \\ P LIGHT POLE 5.75 W) \\ \ 9 �' l i \ �j. \ \ M \ \ RCP REINFORCED CONCRETE PIPE \ \ \ \ \ \\ \\ \ \ \ � \ n \ \ SAN SANITARY SEWER \ \ \ \ \ Y 78\ \\ /\ 5 91,E \\ \ \ \ �- \ \ \ \ \ ` \ \ _\ \ MH MANHOLESID SATELLITE I F+ �LGT / \�\\ \\\\ \\ / � ,�\\ \\ \\ \\ `\ \ `\ `\ \ \ TP TELEPHONE P DESTAL 471. \ \ \ \ — \� TR TRANSFORMER p 20 40 VCP VITRIFIED WV WATERCLAYPIPE VALVE SCALE: 1 "=20' m 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@30scalle.com www.30scale.com QZ W TEMM F Q Z WW Cn w Q�� Q 0 z OW Z z 1 a- i Z a J W o 1 O a. zCD O7 Z Nd 0 O J 0� LL Z 0 2 W 0 Il 0 W � D w~ >Q Q o_ Z O W w U)< w w J_ J r> J U ° U co sheet title: EXISTING CONDITIONS PLAN scale: 1 "=20' date 12/23/2021 sheet # 2 OF 11 2021 - 30 LLC m � I I LIMITS OF DISTURBANCE = 1.16 AC. lI I WIRE FTNCE I IE4ISj A MH (PRIVATE) TOP=469.46� I 18 V P N IN=464 7-0) I I I 181, IN .0 T�464.22 (N) 'I AI� I AIN XIS IN /TE pSAyJIIT�R S, I I VICE / G 11�)II� \\\ \\\ \\ 1111II�II / Pi2Es ` D�LC4PL` PP ALBE A L cCJNI \ / AR E BERLECOITY GI I 1 \ 1 I II I III \ \ \ \ \ \ \ \ \ \ EXI$TI " GIL 5I P I"I�I I I I I I I I I 432 \ W AS 1 \\ /� 0 4 U 1 F � P---, (_/ 49 5 \ppF /_xw/ / / // ///�wi7 / I I /� I /L� i IT INE ISTI \EX. SAN MH//�w/ I IIZ/I S,NIT Y SEW TOP-48 .17/ / / �I I / / (/ CDU ING FILL / N 8" VCP V OUq 4' / / w /� S/ //Z WATE �ROTECTIQ�Jw / ��� / I E l / I FE LE h ORDJ�ANCEBUFF .L \\ F D ONEP\ N°M / / II ��� ,m7mN /�l�/� /� I / 2± \ �\ �P\7�53F1 �ZQN, '' \ \ ANAGED SLOPS / / �. 3T' - W @ O��o 01// 14'L X 0'W CL Al RIP -RA \ \ \ \ \ / I PER ALBEM LE #90 N0 E / / /� /�� /d / y \ I \ \\ \ \ \\\\\ \ OUTL T PRO TE TION A 24" / COUNTGISg\lam C4LdLiNK � EEP ( CY) W TH FILT R / \\ RELOCA E EXIST AB&1CU ER YME T \ \ \ \ \ / _ I / UTILI ITHIN T E / DISTURBAN E #g �j i( _ i a /� �/ / a� L 43¢� \ OW RIOR TO FILL OPERATIO S MAIVATE S Rll WE(k \\ \ \ \ \\ \ IN ICE DtVb BILE HOME _ — _6 — /� \\ ERATI /46 / 44— /� 4 3 315 5 \ Y� N MH SU/ BIiC� II V-43�46 *732 /a6 —� o% + 50 E12 p7 2 Eli 468.92/���-465—\\�j�E E EF $0 ri \ / \\, as � �E4 � _ _ �//CGS_ — _?--- D ILL P ONS _ \ ' \ 4 \ TO M A ER Al \\ ` BY W8SI — — \ \ ss \ — \ \ //// //1 S E+M tllll I I I III 11 I \\ \ \ \ , 454 \ \ \\ \\ \ / t 73 \\\—\� 4 /� / / / / / #7 �- sa 55 / \ 1 \ \ \ ` I �� \I — -- \ \ / �t / /� / / MOBILE HOME \IMIT�S OF DIS IIUF� AN� E 1.�61A0. /100000 / L -=�EXISTI�'G�/i 1 STEEP SLOPES 35' -PROP 36" RCP @ 6468— .00% 1\ 468.81 \ \ \\ = 462— TP \ /// \ I I II I I I LEGEND 468. 3 � ; MANAGED SLOPES \ \ \ I \ \ a5 \\ \ \` \ ELE'6�PAANNE� OCATE PRIOSTI�N( FILLY 9 / D s ��� \ \ 6LPERATIOT�S I SOUTHN OD I I PRESERVED SLOPES EX CACB \ \ WW�FENC� \ \ \ — / / / I I I I I \ \ \ / \-- CHARL TTESV LE, LLr I TM 90A1- 1D I I I I I I I I ABBREVIATIONS STUNG SAN fH (PR'6T\ \\ 57 NE: —2 I 1 1 1 \ 1 ` I I CO CLEANOUT \ \ / \\ \ + \ \ \ // \ \ I 1 INV INVERT w� ` T'V£PINV. IN-466\.53 ( \\\ ySA \ \ \ 2j0 �? \ ` Pl �/ \ \ ( I \ \\ \\\\ \ LP LIGHT POLE / \ \ 6' VCP INV�, 465.7 (E) \\ \ S F \ \ \ \ e�4Q J�� /�/ \ / RCP REINFORCED CONCRETE PIPE � IN -(Q T=4665.75 `W) �O\2j •\\ SAN SANITARY SEWER �\ \ \ !' \ \ a 5 e \ \ \ j` \ \ \ \ \ MH MANHOLE \ \ \ \ \ \ \ \G 78\ \\ /\ /j� 9�� \ \ \ �_ \ \ \ \ \ \ \ \ SD SATELLITE DISH \ \ \ \ \ / TP TELEPHONE PEDESTAL WV WATER E 4 TR TRANSFORMER \ \\ \ \\ \\ \ \ \ \ \ \ \\ \ COti !_ apt \ \\ \ \ \ / / \ / \\\ \ \ \ \ \ \ \ \, VCP VITRIFIED CLAY PIPE —�,C-1 SOILS LEGEND SOILS TYPE ® ® ' BOUNDARY 27C NRCS SOILS TYPE 2 0 20 40 SCALE: 1 "=20' REVISIONS # DESCRIPTION DATE ENGINEERING LJUSTIN AT FOR HUMANITY OF TER CHARLOTTESVILLE ND ST SE LOTTESVILLE, VA 22903 r: ALE, LLC STIN DRIVE YRA, VA 22963 .242.2866e@30scaie.com ww.30scale.com Qz W TEmm F Q Z M) WW Cn w Q�� Q Oz W Z z 1 a- 1 z a-(N J W O � zoo 0 QNa- z a- O 0 ILL z O H 2 W H D- C~) CO W D W >a a o_ Z 0 W Q r ) Q W V w J J_ U ° U co sheet title: GRADING PLAN scale: 1 "=20' date 12/23/2021 sheet # 3 OF 11 2021-30 SCALE, LLC m m ,j 495 490 485 480 475 470 465 460 455 450 445 440 435 430 425 420 415 410 2 3 N N M O II Ga= 0 4 5 �D i O Co M I J N M = J M M = w II O' 6 PROP.GRADE INLET STRUCTURES AND (2) MANHOLES TO BE REMOVED AND REPLACED o Pop pPo 36 RCp @14. WITH NEW DI-3C TOPS AND MANHOLE BASES. " RCP TO BE REMOVED 36" RCP @ 6.00% 31' -PROP EX. GRADE 79, 33' - PROP 36" RCP @ 0.50% 141 X 20'W CL 1 RIP -RAP OUTLET PRO ECTION A - PROP 36" RCI @ 1.00% N v ^ O _ FILI UND ER FABRIC RLAYMEN N 00 rn m Ln W � o H (n II O ZZ Z Z (D (O M CO N + ++ II 0? II It O 0 Z 1=n — II a_ (n Z Z zo M M Z Z a _ M - M M w 0 O U' co a v 0 a O M v 7 7 Cl) v O o W �(i f") M v a LO Cl) v p" M r- LO M co v v (O M O 7 V v v V O LO 0 1- v v N V 0) (0 Lo I- v v W N 1-m CO , v v V CJ m CO V v v V r Di CO v N W O N V) v v O � LO v v O N N O � LO v v LO O N (6 r• (o v v O M W r— CID(o v v co W v TO STR #5 DA=3.16 AC. C=0.55 \ v - 1 0+00 + 0+50 + 1+00 + 1+50 + 2+00 + 2+50 + STORM SEWER 1-5 PROFILE STORM SEWER - DRAINAGE AREA MAP SCALE: 1 "=100' 5.3400' FLAT TOP MH-1- TOP ELEV=438.00 2.0' 'Al _ 4.0' 10.E STEPS PER VDOT ST-1 RCP INV. (FROM36" 36" RCP INV. ............ COMPACTED SUBGRADE PROVIDE REBAR CAGE TRASH RACK COVERING 2'W X 15H WEIR OPENING 2'W X 1.5'H WEIR IN STRUCTURE 2 TO REMAIN OPEN DURING ALL PHASES •C•0—FeT._•o 2'W X 15H WEIR INV.=435.00 9-LF 15" RCP @ 0.89% 100-YR WSE=436.74 3+00 e 3+50 TOP OF EMBANKMENT = 438.00 z °Iw 0 Z I W EL=437.0 11 — SEDIMENT TRAP b I DRY STORAGE CNF� VDOT. STD. EW-1 — !=L-4JeJ I I TRASH RACK AND I SEDIMENT TRAP METAL PLATE PER I WET STORAGE VDOT STD. SW -DR I M �I 1-YR WSE=432.37 I EL=431.5 STORM STRUCTURE 2 AND 2A CONSTRUCTION DETAILS NTS - 6"-DIA ORIFICE AT INV.=431.50 DURING E&S PHASES, CONTRACTOR TO PLUG 6" ORIFICE e 0 20 40 HORIZ. SCALE: 1"=20' 0 10 20 VERT. SCALE: 1"=10' 465 460 455 450 445 440 435 430 425 420 415 410 I 4+50 o ^_ M vwu u F � O� w EX. GRADE to GRADE WEIR PLATE TRASH Pi WITH kCK-SEE SHEET 9' - PROP 15" RCP @ 0.89% 7 00 Co— cM MM LO M In --o o z w 0 a 0 a 0+00 + 0+50 STORM SEWER 2-2A PROFILE REVISIONS # DESCRIPTION DATE 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 ENGINEERING LJUSTIN AT FOR HUMANITY OF TER CHARLOTTESVILLE ND ST SE LOTTESVILLE, VA 22903 r: ALE, LLC STIN DRIVE YRA, VA 22963 .242.2866e@30scale.com ww.30scale.com QZ W Q z M) Ww Cn w Q�z OLu z Z< Z a- 1 z a-N Q \ � CD J Lu I Z O 0 ZNa- d J p0g 0 J _0 0 ILL Z 0 F_ w 0 tl ~ci W w~ >Q J¢ o_ 0 w Z rn U)< w w J J r> J r U co 0 sheet title: STORM SEWER PROFILES AND DETAILS scale: HORIZ. 1 "=20' VERT. 1 "=10' date: 12/23/2021 sheet # 4 OF 11 2021-30 SCALE, LLC 485 480 475 470 465 460 455 m 470 465 460 455 450 445 440 435 430 425 420 W 0 W 485 480 475 470 465 460 455 450 445 440 435 W 0 C7 X W GRADE ROP.GRADE- NOTE THIS SECTION IS PRIMARILY IN CUT TO CONSTRUCT THE SEDIMENT TRAP W V oIt a V M OR co It N O M V qT It� LL7 � M I' 00 N C") V O V 0+00 + 0+50 + 1+00 + A -A' PROFILE 1+50 2+00 ET ABOVE NATURAL 6 BE ATURALGRADE GRADE --RROP - DE W 0 K U` a K 0 M V (o v N O 0 N (o to v v 7 (O 6 � (o v v v Cl) 07 (o v 00 N co (n a v (D (O to LO v v h I� (n v 0+00 + 0+50 + 1+00 + C-C' PROFILE 1+50 :1K( 465 475 460 470 455 465 450 460 445 455 440 450 435 445 430 440 425 435 420 430 485 490 480 485 475 480 470 475 465 470 460 465 455 460 450 455 445 450 440 445 435 440 8 FEET ABOVE NAT' IRA GRADE --------- ----- —------- --- - ------------- ---------- ---------- GRADE W 0 U' 0 V M O) h CO a �a (O u) N 7 fl- O� �� 0) (O N (n (01— .1a O) (O N (n O� 11a (O N N (n O 'T T7 N r (o as N O O) O (o (O 11 0+00 + 0+50 + 1+00 + E-E' PROFILE 1+50 0 2+00 485 480 475 470 465 460 455 W 0 U' WW W 0 X W --� �r-- _ r . ■--- ---� 0+00 + 0+50 + 1+00 B-B' PROFILE 1+50 475 470 465 460 455 450 445 440 435 430 8 FEET ABOVE NATURAL GRADE PROP. GRAD -- --------------- NATURAL GRADE — EX. GRADE W 0 9 (D a 0 a O) O) co IT N Ih N (N 1`1 to It It T7 O) N N 1� LO v c N M N (n r— LO v v (O CM O) r- (n v v I* 00 to v N N co c0 a a 0+00 + 0+50 + 1+00 + D-D' PROFILE r, ' -��%�i+�" ' I r „ILI mo ya ���• \� CROSS-SECTION KEY MAP SCALE: 1"=100' 1+50 490 485 480 475 470 465 460 455 450 445 440 COMPLIANCE WITH Z.O. 5.128(a)1 NARRATIVE THE CROSS SECTIONS ON THIS SHEET GRAPHICALLY INDICATE THAT THE PROPOSED CLEAN EARTH FILL DOES NOT EXCEED EIGHT FEET ABOVE NATURAL GRADE TO MEET THE INTENT OF Z.O. 5.1.28(a)1. ALSO NOTE THAT THE MAXIMUM SLOPE DOES NOT EXCEED 3HAV. 0 20 40 HORIZ. SCALE: 1"=20' 0 10 20 VERT. SCALE: 1"=10' REVISIONS # DESCRIPTION DATE ENGINEERING LJUSTIN AT FOR HUMANITY OF TER CHARLOTTESVILLE ND ST SE LOTTESVILLE, VA 22903 r: ALE, LLC STIN DRIVE YRA, VA 22963 .242.2866e@30scale.com ww.30scale.com Qz ui TEmmI..L III > Q z M) WW Cn w Q � � Q 0 Oz w zQ z 1 Q D- 1 Z a Q Q CD J LU i Z � O 0. CD N O7 Z a- J o0� OJ _ O a- LL. Z 0 F_ w 0 D- c~) LU L W L/) W a a O W Z < w v , W J J_ r� J U co 0 sheet title: CROSS -SECTIONS scale: HORIZ. 1 "=20' VERT. 1 "=10' date: 12/23/2021 sheet # 5 OF 11 2021 - 30 LLC m PRES \ D�L \ P R ALBE C15YO dESEOPES II�LBE�A$COUYGI I \II I\ \ EXI TI IP I� I} vA1 X SAN/MH/P IV�1 4 li I TOP 48 .17 Ix 14 • / , I 8"VCPV��478.02 / / / // w / / / / L ATE PROTECTI0 / I ° / / h ORD ANCE BUFF �' D PSPNp� / B� / / ,/ / / I 429.571 \ \\ \ \ \\ / w �w 1tAL j// ANAGED SLOPS / I PER ALBEMARLE #gj /E / I/ �" \ o COUNT GISgt1EN°M / // ��'I L4 �' OP \\ \IA \ \ \\ 436 BILE HOME aao \ \\ \ \ \\ \ 44V. 2 /�/^/ / / �jg4i j�� — SANMH( T — Il `= \` \ —i B�IiC` II V-43�46 \\ \\ \ \ \ �'//—................ 4\ E IS A MH PRIVATE / / / °j / — 1443 ° TOP=469.46— 0,, �s s / / /� 445 81 V P N IN=464) Y V I I I N N4.90E 45 '02 & 4.2NI8" IPN O IT o ajam \ E'�E� m G �Y\ \ % \� \� j/j/ EFF6€NEE —�\ \\ o D �\ , ���I�GS IST11I\�' �E4� \ �_--- \ —__* YW$SI \ \\ \ \I 1000, D?\—_\ --- —_ �4�\ — / //� 4T�6;J8— — _ \ STEEP SLOPES /, Q`� \ \ ;�;:R &V N ,� s-454\ _— -_��� j//, — _ -- \ \ \ LEGEND SOILS LEGEND \ \� 1 455 =� #7 80 4 MOBILE HO \ \ \ \ \ \ ° ° SOILS TYPE ` \ \ ME n MANAGED SLOPES — — — \ \\ BOUNDARY \ L \ a >sQ \perms \ \ \ AF \ \ \ \ \ \ \ \', \ \� '8p� — — \ \ /�/ / 27C NRCS SOILS TYPE \ \ \ \ \ EXISTING STO DI EXISTING / / \ \ \ \ I I I/ /�� MH LID TOP=468. 9 \ , — _ _ / �� 11 / PRESERVED SLOPES \ \ \ \ \ \ \\\ 15" RCP INV OUT 63.28 \ \ \ `�\° — 276 \ \ I I L J T— — 462— — T \�58 \ \ \ \ \ I1aa.s \ \\\�— /'c/ \ ABBREVIATIONS \\ 1 II 1 \\ \\ \\� \ \�y0 \ // \ I I CO CLEANOUT \ 1 1 1 \ 4q \ \ _ \ \ \ EL8QPAAN LL / �Lj� / I I INV INVERT LIP LIGHT POLE RCP REINFORCED CONCRETE PIPE / ( ) Q�py/`/ \ \ ✓ SAN SANITARY SEWER \ \ / 0 MH MANHOLE EX. ACE D \ \ I / �/ OUTHW OD I SD SATELLITE DISH WFENC \ \ \ / / I I TP TELEPHONE PEDESTAL OF C B F \ — / / CHARLTTESV LE, LL� TR TRANSFORMER 0 20 40 TM 90A 1- 1 D I I I VCP VITRIFIED WATER VALLAY PIPE SCALE: 1"=20' SUNG SAN MH (PRT\ \\ \ \ \ \ \ \ — \ / G NE: -2 I \ 1 1 \ \ \ \ O-468.62 \ / a�Q 57 \ \ \ \ / / 1 \ \ \ 61"VCP N=46653( \\\\\ +.10 \ \ \ \ 1k0e '6' VCP IN 465.'1�((E) \\ \ Ay —8"� N��`Q\.75 \W) \ \\\\\\ e 9!T C \ \ \\\ \ ',-278\60 EROSION STD# AND ABBREV. SEDIMENT SYMBOL CONTROL LEGEND E&S PRACTICE 3.02 CE =A:fl CONSTRUCTION ENTRANCE 3.05 SF X—X— SILT FENCE 3.01 sAF -0—o- SAFETY FENCE (CHAIN LINK) 3.07 IP ® INLET PROTECTION 3.09 DD DIVERSION DIKE 3.13 ST TEMPORARY SEDIMENT TRAP 3.31 TS s TEMPORARY SEEDING 3.32 PS rs PERMANENT SEEDING 3.35 MULCH LOD = LIMITS OF DISTURBANCE 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 Qz W r Q Z m) w o W (1)w Q�� Q 0 Oz w Z z a- i Z a Q Q boo J W o 1 Z CD O ZNa- d J 0 � O = o� LL.z 0 2 LLJ H D_ U Q C0 W D W Q a W O W Z a � �'1 Q W VJ w J J J U ° U CIO sheet title: EROSION AND SEDIMENT CONTROL PLAN - PHASE 1 scale: 1 "=20' date: 12/23/2021 sheet # 6 OF 11 2021 - 30 LLC m CEP ALBEEh RLE�COITY GI I 1 \ I I I I \ \ \ \ � -XI 432' QX.8ANIMW(P�14 11V426 >\ \\ \ \\\\ \\\\\ \ \ \ ORD WCE BUFF F D ONE `�/ % 53F�1 MOB /// If -All 429.571 A..7(AL 00 / 0 \\ANAGED SLOPS PERTCOUNGIS \ 434 MOBILE \\ \\\\ \\ \ f P \ SA N MHap / WIRE Ff�NCE SAF IEi�IS , MH (PRIVATE) T TOP=469.46- 8 V P N IN=464 Tov) IN= 64.90 (E) 18" IN 0 T�64 22 (N) SEDIMENT TRAP DRAINAGE MAP SCALE: 1 "=100' IPalo/ BILE HOME / _ F IiEF ?— YW8SI 4, --- �_ STEEP SLOPES _ \ 55 \\ \ LEGEND SOILS LEGEND / #780 \ r1nn I MOBtLE HOME \ \ AF \\ \\ \1 ° ° MANAGED SLOPES m BSOILS TYPE OUNDARY GAF \ \ 1 1-Q--4j 0 \ \ \ \ \ \ \�, %� \ �1 — EXISTING „f NRCS SOILS TYPE EXISTING STOR DI MH LID TOP=468. 9 \ 0 / / / 7p \ \ 1 I II PRESERVED SLOPES � / 15" RCP INV OUT 63.28 \ \ `i 46 � _ 2 / 8 \ \ \ I 462— 35' - PROP 36" RCP @ 6.00% 1 1 468.3 XX 0 AC OF CB \ SUNG SAN 1fH (PRTVA. \ ' \ 6' VCP_INV. 1�6646 (2 \\\ �\ / a�Q+ 7 \ �6�VCP IIN 465.' (E)\ \\ \\ \ 9sAs \ \\\� \ ��78� \\\\/\ 5 _43 4 4 5 \ \\ I/��46 —/ / // / 9 g3 - K�9 /�--� / \ n / \450\ / `\\ I I 468.92 444 \ EBB Lf D T =46 . X \\\PIN�\\ RCPINV N- 1�\�\ s as — \•-- 4 - E / ABBREVIATIONS \ ELE6 PANELti0 \ �I I CO CLEANOUT / / ZlF INV INVERT LP LIGHT POLE RCP REINFORCED SAN SANITARY SEWER CRETE PIPE OUTHW OD I I I MH MANHOLE SD SATELLITE DISH F W�FENC \ \ \\ -- / / ' CHARL TTEIS LELL I I TP TELEPHONE PEDESTAL TR TRANSFORMER \ \ , TMr/'/�)j7 90A I - I D 0 20 40 I I I I VCP VITRIFIED CLAY PIPE SCALE: 1"=20' \ \ \ \ \ \ \ z IV -2 1 1 \ \ \ WV WATER VALVE 471. EROSION STD# AND ABBREV. SEDIMENT SYMBOL CONTROL LEGEND E&S PRACTICE 3.02 CE c=1 CONSTRUCTION ENTRANCE 3.05 SF X—X— SILT FENCE 3.01 sAF -0—o- SAFETY FENCE (CHAIN LINK) 3.07 IP ® INLET PROTECTION 3.09 DD + DIVERSION DIKE 3.13 ST+ TEMPORARY SEDIMENT TRAP 3.31 TS s TEMPORARY SEEDING 3.32 PS Ps PERMANENT SEEDING 3.35 MU MULCH LOD LIMITS OF DISTURBANCE 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 Qz W r Q Z Ww Cn w Q OLU W MT Z z a- i Z >° N Q Q > CD J w o 1 O Is a- N d OJ �0 = °� LL Z 0 2 W H IL U LU CO W COW a a W O w Z w v , W J J r n J Ucn 0 sheet title: EROSION AND SEDIMENT CONTROL PLAN - PHASE 2 scale: 1 "=20' date: 12/23/2021 1 sheet # 7 OF 11 © 2021 - 30 SCALE, LLC BLOCK Sc CRAVEL CURB INLET SEDIMENT FILTER CURB INLET ---� O �- Xgpgt MW MI SEDIMENT I WIRE SCREEN 2- X 47 WOOD STUD �s CURB INLET SPECIAL APPLICATION TH15 METHOD OF INLET PROTECTION 15 APPLICABLE AT CURB INLETS WHERE AN OVERFLOW CAPABILITY IS NECESSARY TO PREVENT EXCESSIVE PONDING IN FRONT OF THE STRUCTURE. • GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE IP) INLET PROTECTION BLOCK AND GRAVEL DROP INLET SEDIMENT FILTER VESCH STD. 3.07 TEMPORARY DIVERSION DIKE Compacted Soil I 18" min. 1 _ —Flow 4.5' min. —•I DID)DIVERSION DIKE VESCH STD. 3.09 3 a z z w z 3 0 CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 1. SET THE STAKES, 2. EXCAVATE A CX C TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6'MA% i '! FLOW 3. STAPLE FILTER MATERIAL. TO STAKES AND EXTEND IT INTO THE TRENCH. C_ 4. BACKFILL AND COMPACT 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 I'I - 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. Curl, Stalks 4 - 6 tons 185 - 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. WIIod Chips 4 - 0 tuns 185 - 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. [lark 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. EXISTING A 3. PAVEMENT FILTER CLOTH 6' MIN. p MOUNTABLE BERM (OvnDNAu SIDE ELEVATION EXISTING G GROUND 1 \\\1 70' NRL B — VASHRACK 10' MIN. , RE' SECTION A -A SECTION B-B 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%D - Improved Perennial Ryegrass 0-5% - Kentucky Bluegrass 0-5% Hieh-Maintenance Lawn 200-2501bs. Kentucky 31 or Turf -Type Tall Fescue 100% General Slope (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. 111 - 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 5609 5007 +- 34' X 47' 433.5 1992 3.13 TEMPORARY SEDIMENT TRAP I'l VARIABLE ORIpµAL VARIABLE GROUND ate. 1.0• 67 CU. YD./ACRE p VARIABLE� n 67 CU. YD./ACRE (EXCAVATED) 4' MAX. FILTER CLOTH ORIGINAL GROUNO ELEV -SEE PLATE 3.13-1 COARSE AGGREGATE CLASS I RIPRAP CROSS SECTION OF OUTLET CLASS I RIPRAP LENGTH (IN FEET) _ (I% DRAINAGE AREA (IN AC.) DIVERSION DINF !� COARSE AGCRECATE"` EXCAVATED / FILTER CLOTH J/AREA / "COARSE AGGREGATE SHALL BE VDOT #3, #M7 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 Species acre Sept. 1 - Feb. 15 50/50 Mix of Annual Ryegrass (Lolium multi-florum) & 50 - 100 Cereal (Winter) Rye (Secale cereal Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100 (Lolium multi-florum) May 1 - Aug 31 German Millet 50 (Setaria italica) Source: Va. DSWC Plate 3.13-2 TS) TEMPORARY SEEDING SPECIFICATIONS VESCH STD. 3.31 SCALE 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 Z Z W > F Z 0 WU 2Of V) w LLI Q �0 O cW C z Z 1 z a Lv Q boo Q J W o r 1 O Z o C4 0-)Z Z c) J o0 OJ _ off~ LL Z_ O H = W H 11 Q LU w >Q Oz U/ W J U (win "✓MI LF. S Lic. No. 33028 12/23/2021 O � '�IONAL heet title: EROSION AND SEDIMENT CONTROL DETAILS scale: AS SHOWN date: 12/23/2021 F- U 0 Q Of w 0 0 2 w J J_ i m r 0 U In I sheet # 8 OF 11 EROSION AND SEDIMENT CONTROL NARRATIVE @2021 - 30 SCALE, LLC M 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 (DID) 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 3.31-13 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, SILT FENCE AND DIVERSION DIKES 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 Area Checks D.A. A D.A. 6 FOREST/OPEN SPACE (ac) 0.62 0.00 Compliance) D.A. C D.A. D 0.00 0.00 D.A. E 0.00 AREA CHECK OK. IMPERVIOUS COVER (ac) 0.60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 OK. OK. IMPERVIOUS COVER TREATED (ac) 0.60 0.00 MANAGED TURF AREA (ac) 1.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 OK. OK. MANAGED TURF AREA TREATED (ac) 1.11 0.00 AREA CHECK OK. OK. OK. OK. OK. Site Treatment Volume (ft3) z,9az Runoff Reduction Volume and TP By Drainage Area RUNOFF REDUCTIONB VOLUME ACHIEVED /yr) . 0 TP LOAD AVAILABLE FOR REMOVAL (Ib/yr) 1.81 0.00 TP LOAD REDUCTION ACHIEVED (Ib/yr) 0.27 0.00 TP LOAD REMAINING (lb/yr) 1 1.54 0.00 0 . 0.00 0.00 �� 0.00 1.81 0.00 0.00 0.00 0.27 0.00 0.00 0.00 1.54 NITROGEN LOAD REDUCTION ACHIEVED (Ib/yr) 1.29 0.00 0.00 0.00 0.00 1.29 Total Phosphorus FINAL POST -DEVELOPMENT TP LOAD (lb/yr)l 1.85 TP LOAD REDUCTION REQUIRED (lb/yr) 0.70 TP LOAD REDUCTION ACHIEVED (lb/yr) 0.27 TP LOAD REMAINING (Ib/yr): 1.58 REMAINING TP LOAD REDUCTION REQUIRED (lb/yr): 0.43 Total Nitrogen (For Information Purposes) POST-DEVELOPMENTLOAD(Ib/yr) 13.23 NITROGEN LOAD REDUCTION ACHIEVED (lb/yr) 1.29 REMAINING POST -DEVELOPMENT NITROGEN LOAD (lb/yr) 11.93 VRRM SITE RESULTS SHEET % I IRGIMA NUTRIENT BANK P.O. Box 142 Peno Laird. VA 22846 (540)2174079 air, % ,LmiaNa1rwnd3ankjn= 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 gg}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 IIUC: 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 stormwater 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 James 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, 06�-X- Gordon D. Weirich Virginia Nutrient Bank, LLC gordon@virginianutrientbank.com 1 540-217-4079 NUTRIENT CREDIT AVAILABILITY LETTER 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 9DISCALE 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 qqrmm w Q I Q W Q 2 O Z I Z J n J J LL `2 ry1M W Z W J U 1-- z cLU G Z LU Z Q D_ N CD W O ' 0 ' Z � O Q O M Z N D_ p 0 11 0 > H Z 0 H LU D_ LU H Q E sheet title: EROSION AND SEDIMENT CONTROL NARRATIVE scale: AS SHOWN date: 12/23/2021 sheet # 9 C 9 OF 11 2021 - 30 SCALE, LLC m xw�\`� \\vxI \\\\ i 1� \ � ��IIIII�III I �\\\\�\\\\\\ II III\1 / /�i//// �/l )1�\ \\\\\\\\ i I I I 1 27e�IIIIIIIIIIII( POINT OF ANALYSIS DA=2.33 AC. III I \I �\ III I I IIII IIII II — 1\\ \� \ I I I\ CN=66 CHANNEL FLOW ` upgp 101 27 W _ A=3.95 AC. \\� \\ CN=74 \ \\\ � z�e� � IIII I I I II \ \\� III\ `` �.\\�✓ -�� ,�' I�IIIIII1111 CONCENTRATED 89W l / FT SHEET FLOW > \ \ \\\\ i L=100 FT s=B.o°i° ELEV=489.5 IIIII ` \ I I IIIII 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. THE EXISTING RUNOFF FROM THE STORM THE POINT OF ANALYSIS. THE FOLLOWING PEAK RATES ARE TAKEN SEWER ON BITTERNUT LANE WILL CONTINUE TO FLOW VIA STORM FROM THE HYDRAULIC AND HYDROLOGIC COMPUTATIONS BOOKLET. SEWER PIPE TO RIP -RAP OUTLET PROTECTION BEFORE ENTERING THE WATER PROTECTION ORDINANCE BUFFER. Q10 PRE -DEVELOPED = 24.3 CFS Q10 POST DEVELOPED = 19.5 CFS CHANNEL PROTECTION WATER QUALITY COMPLIANCE NARRATIVE CHANNEL PROTECTION IS MET BY COMPLYING WITH 9VAC25-870-66(B)1b. 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 AND THE PURCHASING NUTRIENT CREDITS. A LETTER OF RATE FOR CONCENTRATED DISCHARGE USING THE ENERGY AVAILABILITY HAS BEEN PROVIDED ON SHEET 9 OF THE SITE PLAN BALANCE CRITERIA. REFER TO ENERGY BALANCE SUMMARY ON FOR 0.43 LBS/YR OF SUPPLEMENTAL PHOSPHORUS REMOVAL. THE THIS SHEET AND HYDRAULIC AND HYDROLOGIC COMPUTATIONS NUTRIENT CREDITS WILL BE PURCHASED PRIOR TO WPO BOOKLET FOR SUPPORTING CALCULATIONS. AMENDMENT APPROVAL. Q1 MAXIMUM ALLOWABLE RUNOFF = 0.90 CFS Q1 POST -DEVELOPED = 0.71 CFS OK \\VZI \27e POINT I \ O I II\ POST DEV ANALYSIS 1ii1 \\� / \ / III DA=2.33 AC. I I I �1 �\ 1 II / I I IIII IIII I(— r 1\\ cN=70 EXTENDED -DETENTION CHANNEL FLOW POND ���/ sj •\ � � / L=642 FT \il I I "OFSITE A=3.95 AC. CN=74 \ \ I \\ 27BIwo \ 111 I IIIII�II It 7�\\ FROM FOREST/OPEN \1 \\'PACE TMANAGED T\ F IIIIII 1 \H\\W � �\\IIIIII \ \ \ \ 1 SALLO1 \ CONCENTRATED F8L0 F \ ELEV=472.0 E81.5 EL w� I\\ \ I I I11 \ 1 III I POST -DEVELOPMENT DRAINAGE MAP SCALE: V=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) 1.52 CFS RV(PRE) 3,482 CF RV(DEV) 4,681 CF Q(DEV) MAXIMUM ALLOWABLE 0.9 CFS Q(DEV) PROPOSED 0.71 CFS OK 2 0 50 100 SCALE: 1 "=50' REVISIONS # DESCRIPTION DATE UIJ MAU 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 QZ W TEMM F Q z M) WW H Cn LU ca 0 Oz W za Z 1 a- 1 z a Q Qboo J W c? a.zoo O Z N z � J � a- 0 J O LL z O H 2 LU H tl ~c) LU L W � W~ a a 0 W Z U/^/��\ a — / < W W J J J r U co U sheet title: STORMWATER MANAGEMENT PLAN scale: 1 "=50' date: 12/23/2021 sheet # 10 OF 11 SWM OPERATIONS AND MAINTENANCE CHECKLIST @ 2021 - 30 SCALE, LLC 0 x U w J U N 0 M Vir..inia Sturnmater Nlana�-ement Ilandhunk, Chapter 9 .luh 2111.1 9-C.16.0. EXTENDED DETENTION PONDS: O&M CHECKLIST Inspection Date Project Site Plan/Permit Number Location Date BMP Placed in Service Date of Last Inspection Inspector Owner/Owner's Representative As -Built Plans available: Y I 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: ❑ 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 -now 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 difculf 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 r`. d r• Who Will BMP Potential Problem E m How to Fix Problem Address Comments ° Problem .0 o y E CL o` > c (D Adequate ve elation Sc r lement as needed. Owner There is excessive Remove immediately. Owner or trash and debris professional There is evidence of Owner or Contributing Drainage Area erosino and/or bare w Stabilize immediately. professional exposed soil e There is excessive Owner or landscape waste and Remove immediately. professional and clippings 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 vegetation professional The inlet provides a Stabilize immediately, as Owner stable conveyance needed, and Gear professional into the pond blockages. There is excessive Owner or 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 Professicr i 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 Correct immediately. 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 during the on rainfall first rowin season Mow (at least twice a year) Grass around the to a height of 4"-9- high and Owner or facility is overgrown remove grass clippings. professional Y'irginia Sturnmater'iana-enx•nt handbook, Chapter 9 July 2013 Z ? Z Element of t`. m c. Who Will Potential Problem E '0How to Fix Problem Address Comments BMP ° Problem � o E Q. > c Vegetation Vegetation is dead or Remove and replace dead or (continued) reinforcement planling 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 slum in 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 firm area. There is significant Conduct a bathymetric study sediment to determine the impact to Professional accumulation. d 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 Seepage into conduit Seal conduit Professional Clear blockages of the riser There is evidence of or onfice(s) 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 motor storms. rills deeper than 2 inches orsloughing. There are soft spots. Reinforce, fill and stabilize seepage, boggy areas immediately. Daml 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 OveAlowlEmer trash, debris, or other Remove immediately. professional gency Spillway obstructions_ There is evidence of Repair erosion damage and Owner or erosion/backcuftin_q 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 feel of leave a clear discharge area. Professional the outlet pipe barrel. There is excessive Owner or Outlet trash, 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 a; restabilize. or around the outlet Establish adequate access_ Access to the facility Remove woody vegetation Professional or its components is and debris that may block and, perhaps, adequate. access. 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 proliferatioi 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 property Owner or pond or easement by owners of BMPs status ; professional Overall buildings or other mark the boundaries (and erha perhaps p (continued) structures of the of the receiving pervious the locality) area, as needed Safety signage is not Provide sufficient, legible Owner or adequate. I I I safety si na e. professional ODISCALE ENGINEERING M) owner r 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 L web: www.30scale.com w Q 1 Q W Q 2 O Z I Z J a. J LL Z W J U Z cW G Z W Q Z Q a - a N O CD W O ' U CD Q O O Z N d a 0 O W a- W Q i sheet title: STORMWATER MANAGEMENT MAINTENANCE CHECKLIST scale: NONE date: 12/23/2021 sheet # 11 OF 11 r, VA c9 r Z D O Q w J K W w m J Q