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HomeMy WebLinkAboutWPO201500066 Plan - E&S 2015-11-17I/ OWNER / DEVELOPER: PLAN PREPARER: TAX MAP PARCEL No: ZONING: AREA SUMMARIES: MAGISTERIAL DISTRICT- DRAINAGE ISTRICTDRAINAGE DISTRICT. WATERSHED: TOPOGRAPHY.• DATUM: CRITICAL SLOPES: MARCH MOUNTAIN PROPERTIES LLC 1005 HEA7HERCROFT CIRCLE, SUITE 100 CROZET VA, 22932 ROUDABUSH, GALE, & ASSOCIA 7ES 914 MON710ELLO ROAD CHARLOTTESVILLE, VA. 22902 (434)-977-0205 A PORTION OF 055E0 -01-00-000A1 CONTACT. DAVE BROCKMAN OLD TRAIL VILLAGE CELL: (702)-985-9088 dave@oldtrailvilloge.com NEIGHBORHOOD MODEL DISTRICT IN ACCORDANCE WITH PROFFERS OF ZMA-04-024 APPROVED ON SEPTEMBER 14, 2005 LOTS 1.7 Ac. OPEN SPACE 2.2 Ac. RIGHT OF WAY 1.0 Ac. PRIVATE ALLEY 0.2 Ac. TOTAL AREA 5.1 Ac. WHITE HALL MAGISTERIAL DISTRICT LICKINGHOLE CREEK SLABTOWN CREEK LOUISA AERIAL SURVEYS, AUGUST 2012 - NAD 83 VERTICAL NAVD 88, HORIZONTAL NO CRITICAL SLOPES EXIST WITHIN THE PROJECT LIMITS. FLOODPLAIN: THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS AS SHOWN ON FLOOD INSURANCE RATE MAP COMMMUNI TY PANEL NUMBER 510006 0237 D. EFFECTIVE DATE: FEBRUARY 4, 2005. EROSION CONTROL: PHASE 1 EROSION CONTROL PROVIDED BY THE EXISTING SEDIMENT BASIN CONSTRUCTED WITH BLOCK 11 AND EXPANDED WITH BLOCK 14. STORMWATER. ORIGINAL SWM BIO -RETENTION POND, BLOCK 14, WPO 2012-0013 WET POND BMP (NWS : 0.82 ACRES TOTAL PROPOSED IM ERWOUSNESS = 10.25 ACRES OR 677- LANDSCAPING: 79 LANDSCAPING: SEE LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND DETAILS. NO EVIDENCE OF A BURIAL SITE WAS FOUND ON THIS PORTION OF PARCEL Al. THE STREAM BUFFER(S) SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE. THIS SITE IS NOT LOCATED WITHIN AN AGRICULTURAL -FORESTAL DISTRICT. THIS SITE IS LOCATED WITHIN THE WATERSHED OF A PUBLIC WATER SUPPLY RESERVOIR. 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE "VIRGINIA EROSION AND SEDIEMNT CONTROL HANDBOOK" AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INIDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN REVIEWING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -7: 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 HAS BEEN ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH FUNOFF-PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. ilk UO rOWWRAWLAMILj U -C7- Eti .LOC 1 mo il, LO 1 \\ �\ \ \ .\�` It t,•. / /` � \ '� .� It a t...'i. V-it' ,. / r' C._ r J1 , w i �r r , OA sJ \ -V 17, l .. qj 11, -J 5: tJ r , r" , , a / 1 >; a i _ ,r. { , _. : z , , SII .,.. Y✓ ,°. < !, w t Rte _ ,< Go , `', ` O • `. , , 250 Z S M „ `` 1 _, t' ... .. i i w. ►fir + 1 it � ,' [) t • , SHE 1 ---------- COVER SHEET SHEET 9 ---------- BMP CONVERSION & OUTFALL CHANNEL «, Oola Will • • ■ mi 1121111 '> • • • • • ■ 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK - AND VIRGINIA REGULATIONS - R NS yr 625 02 00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. 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. B. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. 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. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURG OF 7:00 AM TO 9:00 PM. 15. 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. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES, WHERE APPLICABLE, ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND 'IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90 LBS/1000SF. INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000 LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180 LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. A��yTH OF r?• qui �Christo er Cn Lic. No. 031672kl ONAL ENG\ • • a w � O U wW ®W 2 Q Q JJ 'Q 14 O '',^ co w W W r Z 2 N � o co N m N NQ Q� ZO 0= rzW �@ OU wo Q.Z JZ � -� W2 U QO W JZ �N Q� _L Z� UN y/n 0 co o LL W v J LL Z W LLi z r -L Orn Q. m� Q W z a v i Z M 74A 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK - AND VIRGINIA REGULATIONS - R NS yr 625 02 00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. 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. B. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. 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. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURG OF 7:00 AM TO 9:00 PM. 15. 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. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES, WHERE APPLICABLE, ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND 'IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90 LBS/1000SF. INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000 LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180 LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. A��yTH OF r?• qui �Christo er Cn Lic. No. 031672kl ONAL ENG\ II • • a w � O U wW ®W 2 Q Q JJ 'Q 14 O '',^ co w W W r Z 2 N � o co N m N NQ Q� ZO 0= rzW �@ OU wo Q.Z JZ � -� W2 U QO W JZ �N Q� _L Z� UN y/n 0 co o LL W v J LL Z W LLi z r -L Orn Q. m� Q W z a v i Z M MYER E • ,. ;Leira 1101 W Q_ II REVISIONS July 30, 2014 Sept. 201 p 5 Nov. 09, 2015 DATE May 9, 2014 • � a w � O U wW ®W 2 Q Q JJ 'Q 14 O '',^ co w W W r Z 2 N � o co N m N NQ Q� ZO 0= rzW �@ OU wo Q.Z JZ � -� W2 U QO W JZ �N Q� _L Z� UN y/n 0 co o LL W v J LL Z W LLi z r -L Orn Q. m� Q W z a v i Z REVISIONS July 30, 2014 Sept. 201 p 5 Nov. 09, 2015 DATE May 9, 2014 FILE NUMBER 8053 SHEET 1/14 NZ g T a v i Z W Q_ Z Q T� z (L W W P Q ' ''^^ LO z r � � U v0 W -1 J06 mJ 0 W J O m Z O U 0 O 00 W FILE NUMBER 8053 SHEET 1/14 �. � -, �.. �.. ..... . i 11 " L- V L— L -%..f I I V I L- 1 14 1 - - - - - - I ----- ---- . .. .. .. .. . - -- - I I I .. . . . . // i� � ---- ---------- � FOR PAVED WASIJ.RACK STR-37 " . "I - -, - -MP;;,t.§7,7- . . . . , I . 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EXISTING ; / \ I / / J 1 �' t.. FH ' (rnsm \ r' �' J/ /' i EROSION AND SEDIMENT CONTROL LEGEND ,���' : \ f��� ..r. .:\.:.:'•:'.:''.'.:'::..•':.....„......'..'.,' �,: ' EX.: $ x8 ROSS. \` - 1 -� '' (4 8": G.V: \ / 4 1 . L ftzt*\ II / r� i ( 1992 3.35 STUB _ �� 1 CE \ i B� N I I l / r y - qN E / \ BA \ I I i ���:.: I. \ �� Lp,N� D1STv� \ f j rI lI / I, i ,._.. I __ _. �EX.3 , �" LIMI � r / / /' / I / - - - �` 6 - /_ t I J / J I \r . 1. \ >`a / / / 1 ' , \ 11 lr� l /l Il 1 i 676 I I ,3 ) r;i \`\ 11 I/ I I / l ,/ / I P %' 1' /' ;' / /,' 7\, \\ rr /I l l / / / / 41, 8 rail, r J ! ' . / I MU I _ -.- I I l / 574 _ _ _ - - .+ 6 Q I I t , /` /' / ---- - -- - ----'--I------_ _ - _ _ _ : 1 �6 W _ ` __ _ l t / .--.-- �O� ^'._ ` ��:• \. 3y -" - - i, ,// l 11 /'/ 11 / i'' !/` / J - - - .­ � ___ __ - -/�� .. , -�­. I^ ----i I/ // - - _ F \ •\, 1- 676 rr''/ II /Il /'/ �' %/ I / SF / 1r,/' / _____ - - -- - - .I.P / '. "�- 3 \\\ W _ 11 l 11 /!J l @ t i 'l , r GRS ` f " ` 4 11 '• 0. ____ / I l III / r -� cRs _____ ----- I / / W / . \ 674 �'a �_ 'r '/l / ,_ / / -(y� r I .� � . L�.1 " �� / //Q `, \t 6� i'' . . ........ . - f (�) S)--O- /,�� I W D� r- -T� `_'�1 I _ - // // / �Q:% { i( '( r \t ,--@---..- ... . .. :. ..: .. I.. . - �___ /11 11 ! 0"". " 'I '. I, I - .- _@_7 / / / . 1, , O.'' * , * , , * * , , , . - �m---. . --- r - - I - J / // // � �'-I � `\ \ I � A ..... - I - . ( -U t -� ):` . �_. �, - .:.. I I.:...-... ... .:.. \,I -_ ....:.-,--,--*--­ _ - - I 11.11 11. - / '/ / 1. > i\ +. , ,"if,/Z �, , /� ,,� I I 1 18 . *. - __ .,.:..:.....:..:.. ___ ____ -__ t, ____ / / / 5�v /; _ ' -I - .. *.. .. - - / I CO ; v I 11�_ ......... . .. V :) ____(��7___________ _____ ----------- __ . ____ __ / / I - "i " i " " ".. ' _____ _------ ' ' ' 7 II11 ' I: / /. I . TABLE 3.35-A ORGANIC MULCH MATERIALS AND APPLICATION RATES DESCRIPTION RATES: • U_4 MULCHES: NOTES: Per Acre Per 1000 sq. ft. Straw or Nay 1% - 2 trans 70 - 90 lbs, Free from weeds and coarse 7 (Minimum 2 402 matter. Must be anchored. SIZE (W) tons for FT Spread with mulch blower 76 tarinter cover) (D) or by hand. Finer Mulch Minimum 35 lbs. Do not use as mulch for PROVIDED VOLUME 1500 lbs. CY winter coder or during hot, 636.00 4:1 WET VOL. EL dry periods.' Apply as Acrylic Emulsion DRY VOL. EL 639.70 slurry, Com Stalks 4 - 6 tons 185 - 275 lbs. remit or shredded 1n 4-6" Acrylic Emulsion DESCRIPTION ST 2 lengths. Air-dried. Do not . 3.0 AC. use in fine turf areas. Apply 201 CY DRY VOLUME with mulch blower or by CY REQUIRED VOLUME 402 hand. Wand Chips 4 - 6 trans 195 - 275 lbs. Free of coarse matter. Air- 76 FT (D) dried. Treat with 12 lbs FT OUTLET LENGTH 18 nitrogen per ton: Do not PROVIDED VOLUME 428 CY use in fine turf areas. Apply 630.00 WET VOL. EL with mulch Mower, chap DRY VOL. EL 633.76 handler, or by hand, Bark: Chips 50 - 70 cu. 1-2 cu. yds, tree 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 lbs./ac. or 45 lbs./1000 sq. ft. A 3.01 �o?popoo SAFETY FENCE CC PAVED CONSTRUCTION C 3.02 ENTRANCE WITH WASH RACK CRS 3.03 CONSTRUCTION ROAD STABILIZATION SF 3.05 X SILT FENCE S3.12 DIVERSION D3.13 SEDIMENT TRAP S B 3.13 SEDIMENT BASIN C D 3.20 -Do- ROCK CHECK DAMS MODIFIED CHECK DAM e 3.20 ;rt - W/ SILT FENCE (SEE DETAIL) TS 3.31 TS TEMPORARY SEEDING (PS) 3.32 PS M U 3.35 M U - ; _ r DC ' a I Dl� 3.39 DC 4 -,/ 6 . :: / DV ' j` ,t Source: Va. I3SWG /: ; ;,11 - . . . . . . . . . . __ - - - - I / I , / , , ___ _- 24� ... . .... � - - r 668 /' ,' I. ,.` i t . ,i I {, ` ' ; / ' . ` \ \ 1�1 , 11 PIS I / r'1 . T ' / r \ / I 11 \ I I -� r f / / I i �I ': �- - / / I/ tI, it l "� ' / / 1' _ / / J I , ---- `. P: _ __ / I 8 \ _ 6 / _ / Ui 6 r _ --- -- r r 1 - J / / �t ; / 1 \ DA 2.1.E xV51, �. ' r C• / r - g �� 1 %/ / \ \\ t , \ r" I l i :6 ---- 6 t i / i/ i r :6 _ / - J., 1 1 i C _ _ 'i k \ _ _ r r3• _ \' t r _- I rr r �.' a' r r �� , 't' I e .'\ I \ • � r 1. I ,r / / t` ��l i1 t I 'C r /; M , 't U 11 � . r 666 S F -'' I ; \ 'Y• ••�I rr a / /� l� \: \ \ 'i r / _-w /. 666 ,r �\\ �. , �,` {; ;} I :\� ;� 11 / / /� It � t / le r i t ; �: U r /' \ Y'�' C UNE ; O E r - -- •� / CHANN SEC ION `� ,i I , I,'` : I : F , \' \' , _ /y� i , `� DIT DEPT 8 /. I 11 /�/ r i 1, 11 \' 66 - / I ! -- - - -- �11 ' ' A I I' ' I'- / / ' --- - '`- r,' I , Cj6�, \ \�` / J. / � / '!% 1 r' I { 1 i f { 1 I \ \� \,\ -2] - 6 658 - �. r O / /1 I r 1 t. \L ' L/ O i I I �° . PS - .\\ \N -----.- E 3 DINED H6XN �� 11 � ' r ' ,, %;/ % 1 / , . :1 , ! i \,� D r 6 ------------ --- _ r -% 0+00 - +47 / I I : ! ' , ; ' 6 ` �` Y r- / Q t r _ 658 _ \ 6 - - li ' '•\ Y; /. 1 // II : t i i 1 1 : I I li' i \\ , \\\ \\ I / r 5 - ' / 662 TEM CHDI 1�EL IO f , �Oj fl / , , 1 I 1.\ / / \ r 1 I f ;' \ i -- ,' s /' \`-- U _� ' / I-'_1 \ \\ \\ - -.,----------- - I I I // 1'> is v Il I 1 \ 1 �, I ti 11 Ii \ . Ilk / -- __ ' -.- - ------ - (��5- , / -----/ -� - r� , \ 1 I I �'9' I r .' i 1: 1.' i S t ' \l _.._ / \ \ ;. rr- !�h / ' / + I a 1� I' I: I 1 4 \ 1, \ "` � / 11-- - 650 - - / 1 \ \ \, /' I I 1 /= i 1 1 \ ;: �\ 11; ,' ,/ ___ - - - - - \ \ 1660 - __-''A Cp ! \ \ , I: t• \ i \\ :\ 11, "I I_ _ � . SF ---- __ 6� __.. _ _ _- _ 11 _ /r \ \ �� , , I \;• \ MU r - , 11 ' ,/ / ,''' - - -- -- - _ ,/ / \\ \ - '------_� -- /r/ %1 i IUPV I! 1' I � 1, it 7 \\, / 11 11 1/1 PS / 1 I - -I r MOP ' ` f, �_ /, - - r b. -.t wd/" .�- _ L. ' - - _ - `\ c0� / / I I r � / ; ,.` r ! ' I � 1 I 11 11 (' -- 0 h I t c i; I I `EWER 100 :` �::, . ,� - - - 5 �.� �� , / \ / '�X - � I ,, isI.1 i , I , �- ' - - - - DC 1 / \\ / ! I I ;' T 1 , C� :'1 S # \�\ r r r, i '•� ,•.. `- va 11 t, ._ � - _ -- - .-. _ Q ,F -------- / 1 ■ t o :� i- U/ i T` /, 1 11 : r / �: \ \ 6 r S /:' A ~ - \ \ r R./ / 1, Eo' _ E GRA � -� \ \ r' .: I G r '- r 6 / '�•y { `> 6 / 111 I �f '� .' CHANIJ�L.- SECTIO ' � �' - .� Q O I -�: I ;. `� 11 y ad ` \ \ I o. \ ' \ v r , 6 H 10' 1 DEp'T 11 I - -- i SIT \ _ ; CH% _ / I VR/1SS UN J , r I \ A \.I. \ _ CH / . f: _ D �. ASS E .1 I CH DE H 10 !' 1 DT ST# 2 \ \ ANNE E ON \ \ „ \ I _ _. t I ! \ - - 1 3 _ ITC H 8 I 1 r \ t ;, s 1 i ANN - D � � 1 1" E H E -%'� �/. GR�ASS L , _ �3 J / - r �i J .1 tri '\.` : I' •i 7 I 2+3 ® I 0+00 1. � \ , J r / !,.il 11 I w/: rl t , \ it I � rM P: VE RS ON 11 _ =fE � Di ZI - _ �w / C s ' t i N -C-H DIEL- ED AN - :� - ; V j r '� - t CHANNEL 132 �,:% _ , 0+00 2+24 ( ,' i 11 y J �. - \ BASS LI A EL , I .� i I 6 \ \ �i 3 I / - 11r- i � l 2 MOP_ M ,r G E t \ i` E _ i �W - � E - � C_ l ' m I o S i s / 1�fNEL I' r Y I ,� r -_ Wr /I R k V SON /:' T A \ P I I / 1 N 3 _ F - V P-14-4 4' <� I S CH NEL1. l J V' 11 i \. :� - _ t \, ��- - _0 t !�. \ _ %fir % -� r a I -11 / s� � r / PERMANENT SEEDING MULCH DUST CONTROL a SEDIMENT TRAP SIZING DESCRIPTION ST 1 • U_4 DA 3.0 AC. WET VOLUME 201 CY DRY VOLUME 201 CY REQUIRED VOLUME 402 CY SIZE (W) 38 FT (L) 76 FT (D) 4.0 FT OUTLET LENGTH 18 FT PROVIDED VOLUME 428 CY BOTTOM TRAP EL 636.00 4:1 WET VOL. EL 637.85 Acrylic Emulsion DRY VOL. EL 639.70 W TOP OF BANK 640.00 Coarse Spray SEDIMENT TRAP SIZING Acrylic Emulsion DESCRIPTION ST 2 .j C/) DA 3.0 AC. W ET VOLUM E 201 CY DRY VOLUME 201 CY REQUIRED VOLUME 402 CY SIZE (W) 38 FT (L) 76 FT (D) 4.0 FT OUTLET LENGTH 18 FT PROVIDED VOLUME 428 CY BOTTOM TRAP EL 630.00 WET VOL. EL 631.88 DRY VOL. EL 633.76 TOP OF BANK 634.00 * MIN. SEDIMENT TRAP BERM WIDTH = 4.0'(SEE DETAILS S�:LTH GF t, l 6+{0 m r� o. Christopher C. Mulligan Lic. No. 4 031672 �'2 0 FS � S NA N SIONAL E i, Source: V D W Sou c . a. DSWC , , ; , 1, , . I , , . ;., , , , , , ,Z , 'r , . ; �: \: \; ♦11 \ \ '�' , / a NZ g • U_4 TABLE 3.39-A U wW 9a W !� cts CD aco W2 ®W[ ADHESIVES USED FOR DUST CONTROL 2 N CO 0& N m toNQ �M Qo �?� ?O Cc LU !E@ 00 wo aZ Jz Oco W 2 UQ rw J z -j N Z (5 2 c6 O� UN Cc 04 CO, 0 di co 0 � W1 %ftw0 O 2 61 II.- 0 . 0 P. �W � (11 . Q� T00 V/ O k a Water Jge FO Application Dilution Type of Rate Adhesive (Adhesives Water) Nozzle Gallons/Acre Anionic Q M Lr a Asphalt Emulsion 7:1 Coarse Spray 1,200 Latex Emulsion 12.5:1 Fine Spray 235 Resin in Water 4:1 Fine Spray 300 Acrylic Emulsion m a Q_1 ~ Cco W (Non Traffic) 7:1 Coarse Spray 450 Acrylic Emulsion .j C/) (Traffic) 3.5:1 Coarse Spray 350 i, Source: V D W Sou c . a. DSWC , , ; , 1, , . I , , . ;., , , , , , ,Z , 'r , . ; �: \: \; ♦11 \ \ '�' , / a REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 SCALE 111=30' CONTOUR INTERVAL 2 Feet NZ g • U_4 r U wW 9a W !� cts CD aco W2 ®W[ 2 g Q Z g Q Z Q U) O rc a - Uj ? Z 2 N CO 0& N m toNQ �M Qo �?� ?O Cc LU !E@ 00 wo aZ Jz Oco W 2 UQ rw J z -j N Z (5 2 c6 O� UN Cc 04 CO, 0 di co 0 � W1 %ftw0 O 2 61 II.- 0 . 0 P. �W � (11 . 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Jrn O�/ v/ O / (� Q T -CO V W W ® W Z ° a REVISIONS Se t.29 201 5 P Nov. 09 2015 f DATE Oct• 6 2 014 SCALE 1"=50' CONTOUR INTERVAL 2 FEET FILE NUMB ER 8053 SHEET 7/14 N Z g I.L Q T IL c G ■ Y Z J w W W W CC �V Q Z W _ 2 Q p.I= Z o oC 06 W % L0 Q � 0 Z '— ac I— U �O Z W w J� M Off � a � 1.1.1 J J O Q■ O W m J Q Q 1.i. ~ z J W O U W Z O Jrn O�/ v/ O / II� O W FILE NUMB ER 8053 SHEET 7/14 ® R5�4�11' X -1\ 1 \\____- �58,; / ... , . , . %0 L.F.�f Wood Pyst ' - - ' 'CONSTRUCTION SEQUENCE AND INSPECTION �, / `y ....,, /y.- 11 .1 Guard Rall, See Detal /lock 12 \1lock _ THE CONSTRUCTION SPECIFICATIONS FOR EARTHEN EMBANKMENTS OUTLINED BELOW SHOULD BE CONSIDERED AS MINIMUM `� '� / �. V on Sheet 8 ' GJ� /' i M ` - - , ATIO MAY BE REQUIRED DEPENDING UPON INDIVIDUAL SITE \ I / / / ' . / ro , 654 - GUIDELINES, WITH THE UNDERSTANDING THAT MORE STRINGENT SPECIFICATIONS Q \ MO .../ . , , � CONDITIONS, AS EVALUATED BY THE GEOTECHNICAL ENGINEER. IN GENERAL, WIDELY ACCEPTED CONSTRUCTION STANDARDS AND \`\ +�, / : ''�. Q/ / i QED BMp E� `� ::. :4; : /::::: MOD1 1€f1 -B �-E$MT. t - 4 �. SPECIFICATIONS FOR EMBANKMENTS, SUCH AS THOSE DEVELOPED BY THE USDA SOIL CONSERVATION SERVICE OR THE U. S. ARMY + ` ' . CO \ MT. (BLK 1 -� .. , ' ' CORPS OF ENGINEERS, CAN ALSO BE FOLLOWED. FURTHER GUIDANCE CAN BE FOUND IN THE USDA-NRCS ENGINEERING FIELD MANUAL `+ ; /Q - z \\ AIV I ' /'® ( ' ---- I'll I X ��- ' I F AND NATIONAL ENGINEERING HANDBOOK. SPECIFICATIONS FOR THE EMBANKMENT WORK SHOULD CONFORM TO THE METHODS AND `\ ! I / � 1 '� - --- CU ®/ ' �''I ' PROCEDURES INDICATED FOR INSTALLING EARTHWORK, CONCRETE, REINFORCING STEEL, PIPE, WATER GATES, METAL WORK, '\ `, 11 / ///`� I : ' . /1..� , ( 658 ___-_- ___ _ i ®__, _ - - - - _ - - 1-1 IT-� ® / / /, r- WOODWORK AND MASONRY, AS THEY APPLY TO THE SITE AND THE PURPOSE OF THE STRUCTURE. +\ \I ' I! =rn+ I ---- - _ ® ------- ' ' i 1----- / . �'\R'1 ^_/ 4 j ov y i _ _ - _ - _ I ��d" -_--, 1 \ t �� ` � _ _ SITE PREPARATION \ I f` I '''" _- -' -___ ;Com - __ , .-- - , - � , 646 // ' ® O 1 II 1 / _ �Z. \ ' l moi'' _ i ' �i�'" _-- _ 11 -�_" '' ''" - - ..--��.}-(}� `�'� \� / '/® , l 1 ~» AREAS DESIGNATED FOR BORROW SITES, EMBANKMENT CONSTRUCTION, AND STRUCTURAL WORK SHOULD BE CLEARED, GRUBBED AND '\ r i / / � / ,IIII _ ___-- " ___--- _ - '� - -_ � - i ^ ` _� ''` �, � - - - 642 �/ STRIPPED OF TOPSOIL. ALL TREES, VEGETATION, ROOTS AND OTHER DEBRIS AND ORGANIC MATERIAL SHOULD BE REMOVED. ALL '',',' ' '� �® /� , '� - -" ------ -'' -` _ - _.�. �'` RED AND GRUBBED MATERIAL SHOULD BE DISPOSED OF OUTSIDE AND BELOW THE LIMITS OF THE EMBANKMENT AND RESERVOIR AS ' I' , �` , ' Q� \`I ® ®, ®,11 I 11 .-� �- _----""- ___---- _ - ' , DIRECTED BY THE OWNER OR HIS REPRESENTATIVE. WHEN SPECIFIED, A SUFFICIENT QUANTITY OF TOPSOIL SHOULD BE STOCKPILED IN I i/' l' Z i i ® ,/ �'� _ - _ ®�- "-- �t s.s \ ` i ®% /\ A SUITABLE LOCATION FOR USE ON THE EMBANKMENT AND OTHER DESIGNATED AREAS. '' I' '' / /' : `.%I ' / zt / , i%F I '' _ - - ___- _ - - - -- 1 , , 1 .a 11 / f ? /, ///'/ \ �\ ' 6- I '' '' /' / / ' I 11�/ V I /_ I I ' ` � \ EARTH FILL �'` , , , , , , . / _ I I r/ ,, ` / ,�/i �, I I ' '11 /"/ I ", , I I/ -/. � , � - A!" I 0 I / 1. MATERIAL -FILL MATERIAL FOR THE BERM SHALL BE TESTED AND DEEMED APPLICABLE FOR BERM CONSTRUCTION. CONSTRUCTION OF ' `/ �'�. /` \ ' / J /` / ,' ,' / '' / ---- �b` I +� [ // `` ' / , . � \ ® , / / / 646 - -�- ; GA PLANT SCHEDULE -- PLANTS QNTY. KEY BOTANICAL NAME COMMON NAME SIZE COMMENT ZONE 3 SHORELINE FRINGE (0-3' From Outer Edge of Aquatic Bench) 455 CP Ca/tha palustris MARSH MARIGOLD 5" Plug 12" Spacing 124 HM Hibiscus moscheutos MARSHMALLOW HIBISCUS 5" Plug 12" Spacing 372 IV Iris versicolor BLUE FLAG IRIS 5" Plug 12" Spacing 331 JE Juncus effuses SOFT RUSH 5" Plug 12" Spacing ZONE 2 SHALLOW WATER/BENCH (3-10' From Outer Edge of Aquatic Bench) 579 GC Glyceria canadensis RATTLESNAKE GRASS 5" Plug 18" Spacing 248 PV Peltandra virginica ARROW ARUM 5" Plug 18" Spacing 331 PC Pontederia cordata) PICKERELWEED 5" Plug 18" Spacing 289 SA Sparganum americanum EASTERN BUR REED 5" Plug 18" Spacing PLANT SCHEDULE -- SEEDING MIX % OF MIX BOTANICAL NAME COMMON NAME COMMENT 35 Carex vul inoidea FOX SEDGE Ernst Seeds OBL Wetland Mix (ERNMX-131) 20 Ib per acre, or 1/2 Ib per 1,000 sq ft 2.1 lbs Req'd. Or Equivalent Seed Mix 20 Carex lurida LURID (SHALLOW) SEDGE 7 Scirpus atrovirens GREEN BULRUSH 7 Carex lupulina HOP SEDGE 6 Carex scoparia BLUNT BROOM SEDGE 4 Sparganum eurycarpum GIANT BUR REED 4 Verbena hastate BLUE VERVAIN 3 Juncus effusus SOFT RUSH 2 Glyceria canadensis RATTLESNAKE GRASS 2 Sparganum americanum EASTERN BUR REED 1 Carex crinita FRINGED (NODDING) SEDGE 1 Asclepias incarnata SWAMP MILKWEED 1 Mimulus ringens SQUARE STEMMED MONKEYFLOWER 1 Scirpus validus SOFTSTEM BULRUSH 1 Onoclea sensibilis SENSITIVE FERN 1 Scirpus cyperinus WOOLGRASS 0.5 Penthorum sedoides DITCH STONECROP 0.5 Eupatorium perfollatum BONESET 0.5 Eupatorium fistulosum JOE PYE WEED 0.5 Alisma subcordatum AMERICAN WATER PLANTAIN 0.5 Iris versicolor BLUEFLAG 0.5 Bidens cernua NODDING BUR MARIGOLD r-0.5 Ludwigia alternifolia SEEDBOX AQUATIC BENCH GENERAL PLANTING NOTES 1. SITE PREPARATION SHOULD BEGIN IN THE FALL PRIOR TO THE PLANTING AND SEEDING IF IT IS NECESSARY TO KILL OFF ANY INVASIVE UNDESIRED SPECIES WITH HERBICIDES. UNDESIRED SPECIES MAY INCLUDE MULTIFLORA ROSE, HONEYSUCKLE AND OTHER SPECIES DEEMED TO BE INVASIVE BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION. 2. IF REQUIRED, THE HERBICIDE SHOULD BE APPLIED BY A LICENSED SPRAY TECHNICIAN USING AN APPROVED HERBICIDE, SUCH AS GLYPHOSATE (RODEO), TRICLOPYR (GARLONO 3A) OR OTHER AQUATIC HERBICIDE FORMULATION TO CONTROL UNDESIRABLE VEGETATION. CAUTION: SOME PERSISTENT SPECIES, SUCH AS PURPLE LOOSESTRIFE, PHRAGMITES OR REED CANARYGRASS, MAY NEED MULTIPLE APPLICATIONS OF GLYPHOSATE OR TRICLOPYR OR REQUIRE REMOVAL BY HAND. 3. IF THE SOIL ON THE AQUATIC BENCH IS COMPACTED DURING CONSTRUCTION OPERATIONS, IT MUST BE TILLED, DISKED OR PLOWED DURING THE SEDIMENT BASIN'S CONVERSION INTO A PERMANENT WET POND. IF THE SOIL IS TOO WET TO TILL, DISK OR PLOW, THEN THIS STEP CAN BE SKIPPED TO AVOID FURTHER COMPACTION OF THE SOIL. 4. THE SURFACE OF THE AQUATIC BENCH CAN BE LEFT IN A ROUGHENED CONDITION TO CREATE MOUNDS AND POCKETS FOR AN UNDULATING MICROTOPOGRAPHY. 5. TEST SOIL PH; THE PH LEVEL OF THE SOIL WITHIN THE AQUATIC BENCH SHOULD BE TESTED AND BROUGHT TO WITHIN A RANGE OF 6.0 TO 7.0. DUE TO THE POTENTIAL FOR WATER CONTAMINATION, THE USE OF LIME OR FERTILIZER IN THE POND AND ON THE AQUATIC BENCH IS NOT RECOMMENDED. ADD ORGANIC MATERIAL TO RAISE THE PH IF NECESSARY, OR IF THE TOPSOIL HAS BEEN REMOVED. 6. SEEDING AND PLANTING SHOULD OCCUR SOON AFTER THE FINAL GRADE OF THE POND IS MET WHILE SOIL IS STILL FRIABLE AND BEFORE INVASIVE WEEDS EMERGE. IF SEEDING AND PLANTING CANNOT OCCUR PRIOR TO THE WET POND BEING FLOODED AFTER CONVERSION, THE WET POND MUST BE DRAINED TO SO THAT THERE IS NO MORE THAN 2" OF WATER STANDING ON THE LOWEST POINT OF THE AQUATIC BENCH. 7. ALL PLANT MATERIAL SHOULD CONFORM TO THE AMERICAN STANDARD FOR NURSERY STOCK, CURRENT ISSUE, AS PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN. 8. AQUATIC/EMERGENT PLANTS FROM ZONE II PLANTS MUST BE INSTALLED IN MAY OR JUNE FOR THE BEST ESTABLISHMENT. 9. DORMANT ROOTS (TUBERS, RHIZOMES, ROOTSTOCKS) MUST BE SECURELY PLANTED. DIG A HOLE WITH A SHOVEL, BARE HAND OR BY POUNDING HOLES IN THE SEDIMENT WITH A STAKE. PUSH THE TUBER, RHIZOME OR ROOTSTOCK INTO THE HOLE APPROXIMATELY 2" BELOW THE SOIL SURFACE. FIRMLY PACK SOIL OVER TOP OF THE ROOT TO ELIMINATE AIR POCKETS. 10. TRIM POTTED PLANTS TO 6" IN HEIGHT BEFORE PLANTING. 11. WHEN INSTALLING POTTED PLANTS, DIG A HOLE THAT IS TWICE THE DIAMETER OF THE POT. REMOVE THE PLANT FROM THE CONTAINER AND TEASE ROOTS APART IF THE PLANT IS ROOT -BOUND. PLACE THE PLANT IN THE HOLE, MAKING SURE THE ROOT COLLAR IS EVEN WITH THE GROUND SURFACE AND THE STEM IS UPRIGHT. BACK -FILL WITH POTTING SOIL OR FILL FROM THE HOLE. MAKE SURE THE PILL IS FREE OF CLODS AND STONES, IS LOOSE, AND IS EVENLY DISTRIBUTED AROUND THE PLANT. TAMP FIRMLY AROUND THE PLANT TO ELIMINATE AIR POCKETS. 12. EXCESS SOIL GENERATED FROM THE EXCAVATIONS SHALL BE DISPOSED OF RANDOMLY OVER THE SITE. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE GROWN IN AND THE TRUNK SHOULD BE SITUATED NEARLY PLUMB. AVOID PLANTING SEEDLINGS IN EXTREMELY DRY, HOT OR WINDING CONDITIONS. HEAT AND WIND CAN QUICKLY DRY OUT LEAVES AND ROOTS. WATER THE SOIL AROUND THE SEEDLINGS IMMEDIATELY AFTER PLANTING. 13. AREAS COMPACTED BY FOOT OR VEHICLE TRAFFIC SHALL BE AERATED PRIOR TO RESEEDING AREA AFTER TREES HAVE BEEN PLANTED. 14. SEED AT 20 POUNDS PER ACRE OR ONE-HALF POUND PER 1,000 SQUARE FEET FOR THE ERNST SEEDS OBL WETLAND MIX (ERNMX-131). IF AN EQUIVALENT SEED MIX IS USED, SEED AT THE RECOMMENDED RATE BY THE SEED SUPPLIER. BROADCAST SEED EVENLY OVER THE AQUATIC BY HAND SEEDING OR HYDROSEEDING. 15. INCORPORATE THE SEED INTO THE SEEDBED BY LIGHTLY ROLLING OR RAKING TO ENSURE A GOOD SEED TO SOIL CONTACT. IMMEDIATELY MULCH AREA WITH CHOPPED AND BLOWN WHEAT STRAW MULCH. 16. WATER IN PLANTS AND SEEDS. REGULAR WATERING MAY BE NEEDED IN DROUGHT CONDITIONS DURING THE FIRST AND SECOND GROWING SEASON THE PLANT MATERIAL IS WELL ESTABLISHED. 17. MAINTAIN THE LOWER WATER LEVELS IN THE POND UNTIL THE SEEDS HAVE GERMINATED AND REACHED A HEIGHT OF 2-6". 18. PROTECT PLANTINGS FROM ANIMAL AND PEST DAMAGE WITH FENCING OR OTHER METHODS TO DETER GRAZING OR OTHER DAMAGING ACTIVITIES. 19. PLANTS SHALL REMAIN UPRIGHT DURING TRANSPORT/STORAGE. PLANTS STORED ONSITE MUST BE PLANTED WITHIN THREE DAYS OF DELIVERY. IN ADDITION, THE PLANTS SHOULD BE STORED IN A PROTECTED AREA UPON ARRIVAL IN ORDER TO SHADE THEM FROM EXPOSURE TO THE SUN AND DRYING WIND. PLANTS THAT CANNOT BE PLANTED IMMEDIATELY UPON DELIVERY SHALL BE KEPT WELL SHADED, PROTECTED, AND WATERED. ALL DAMAGED PLANTS SHALL BE REMOVED FROM STORAGE. 20. NO STORAGE OF HERBICIDES OR OTHER AGRICULTURAL CHEMICALS SHALL BE PERMITTED NEAR THE PLANT STORAGE OR MITIGATION AREAS. 21. WHEN FEASIBLE (GROUND IS NOT TOO SLIPPERY OR MUCKY TO SAFELY WALK), POST -PLANTING MAINTENANCE WILL PROVIDE THE BEST RESULTS FOR WET MEADOWS AND WETLANDS. WHENEVER CANOPY (OVERALL VEGETATION) REACHES A HEIGHT OF 18"-24", USE A STRING TRIMMER TO TRIM THE MEADOW TO A HEIGHT OF 8". THIS WILL REDUCE COMPETITION BY FAST-GROWING WEEDS FOR SUNLIGHT, WATER AND NUTRIENTS NEEDED BY SLOWER GROWING, PERENNIAL NATIVES. MOWING SHOULD CEASE BY MID -SEPTEMBER. U." / .../ \ f 658 - \�\ , �;" r 646 AG�1� 'T ro42 ' PINES,, f A /i \ y 1 / ll 2x5, , I , •• �`i►♦SIA♦♦t♦'��"`♦�'��.1�II►i►�U'►�M,'�►�� 7,s►r♦ ♦'r WPM wj, 0A ,01\OP� T, . ✓ ' 652x5 '71 52 / / / ' 648 - ._ -- AQJ ATI�,ENCH'_ s4 646 ' -�-- � _ 64 � /� 644 PLA N�f�N _10 y y Imo► - ...1 : � ' / . �' �'Inv(Out)� 635.18''' - ' FEMA 'FLOODPLAIN' 4 34; 5 ('0 /-Q/ C �'S JE - , 120,1 ' 10 • 0 ' 20 // AO ._.,� „q� . /'' / �i' f, , . '"�00 �r iI _-_ -_=- ---- _ A / L00 SCALE'IN FEET/' ,' SCHEMATIC PLANTING DETAIL NOT TO SCALE LEGEND Rig GC PV PC TH 0 I ' 0 GE U No. 006 1817 SA SC41)Z ARC��� A I NOTE PLANTING LAYOUT IS An EXAMPLE FOR A ONE ONE -HUNDRED SQUARE • U FOOT SECTION OF THE AQUATIC BENCH. THE PLANTINGS FOR THE CID REMAINING AREA OF THE AQUATIC BENCH SHOULD BE SIMILAR TO THIS W 2 r Q Z � V) W rr rrJ^ V, �w W Z EXAMPLE, USE THE SAME PLANT SPECIES, BUT SHOULD BE PLANTED IN A z MORE RANDOMIZED ARRANGEMENT IN ORDER TO PROVIDE A NATURAL LANDSCAPE. H M THE CONTRACTOR SHALL TAKE NOTE OF THE ZONE IN WHICH THE PLANT Jw SPECIES SHOULD BE LOCATED TO CONFORM TO THE INUNDATION TOLERANCE OF THE INDIVIDUAL PLANT SPECIES. m THE SEEDING WILL COVER THE ENTIRE 10' WIDTH OF THE AQUATIC BENCH. IV Q Rig GC PV PC TH 0 I ' 0 GE U No. 006 1817 SA SC41)Z ARC��� A I REVISIONS Sept. 29, 2015 Nov. 11, 2015 DATE Oct. 6, 2014 SCALE AS SHOWN CONTOUR INTERVAL 2 FEET • U a w t/3 ct W 2 r Q Z � V) W rr rrJ^ V, �w W Z N �=/� co 0 co N Oo � NQ Qr C'300�` rt U, ii; V O0 W o a Z z 000 wa VQ �W J CC N � V N 0� c� 0�00 y 0 O U_ W. J� W OJ o n ZObi aW Q� MCO o z z REVISIONS Sept. 29, 2015 Nov. 11, 2015 DATE Oct. 6, 2014 SCALE AS SHOWN CONTOUR INTERVAL 2 FEET FILE NUMBER 8053 SHEET 9A / 14 Nz rg ■ z z Jw m W w Q /W^ (L Q T■ .L Q < U a z (L z 2-1 W W Q ,- Z Z 0 ■o O W J0 ♦♦^^ vJ J � 2 j W m w J0 _ Z m a Qz �p O F- U U 0 to J 55 O 00 a. W FILE NUMBER 8053 SHEET 9A / 14 TEMPORARY SEEDING MIXTURES FOR THE PIEDMONT AREA Ts STONE CONSTRUCTION i ACCESS i" Ss.# -2a As SHALT TJX } COURSE K V \-6' M N. 21A AG ;R=GAZE BAST= PROFIL 1' C+' WN. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE ^TO"4i TABLE 26 LESS) - KENTUCKY 31 FESCUE CCPD':rRUCII N A, ,CESS TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES ASPHALT PAVE WASHRACK - SEASONAL NURSE CROP* {4. a 1000 sf Seeding Rate Planting Seeding zones 37/ and Seeding Date 38/ 2% is� PAv=F, IFN 2 LBS. depth 36/ 20 LBS. - CROWN VETCH** 20 LBS. STANDARD 48 INCH RACK SHOWN Species3/ Per Lbs/1000 FEBRUARY 16TH THROUGH APRIL 30TH. . . 7a and 7b 6b *V057 EXTEND FULLWIDTH e 6a and 5b 2/1- 5/1- 8/15- 3/1- 5/1- 8/15- 3/15- 6/1- 8/1- LEGUME SEED MUST BE PROPERLY INNOCULATED. acre Sq. ft (Inches) 20 LBS./ACRE IN MIXES. PLAI.� following establish - 4/30 8/14 11/30 4/30 8/14 11/15 5/31 7/31 10/31 Choose one: 2 IRAPPING DEVICE .< .... -- :.. BY years thereafter. I BY 1, BY Barley 2.5 bu. 2.80 1-2 X W 10/15 X stand of tall 10/15 X 11 5 10/1 Oats 3 bu. 2.21 1-2 X ment and every 4-5 - X - X years thereafter. - Rye39/ 2.5 bu. 3.22 1-2 X X X X X matured. X Barley or Not required. not weeping lovegrass j I PLAN SIDE VIEW ISOMETRIC closer than 4" if ... ...... ........ ......._...__........... StormRax ....... .... ..... ...................._.... _............... ............................ .............................. .. TM Round Series for Concrete Manhole Rye Plus 150 lbs. 3.45 1 X X 10/15 X X 10/15 X X 10/1 Foxtail - --- 2114 14 3 $ 40 �a 36 43 X X X X X X X X X millet40/ Mow no closer than _..__.____._._.._.._......_ .............._............ .. ... _. _....... 250 CROSS BRACING FOR OVERHANG 30 days later I fescue, Kentucky HDPE ANTI -VORTEX PLATE - Weeping 4lbs. 0.09 1/4-1/2 X PO Box 4386, Winchester, VA 22604 238 McGhee Rd, Winchester, VA 22603 '----._.._..- ....... ........... fescue mixture: X ................... DRAWN BY: 2.3 X " (877) 877-5727 phone PROJECT: lovegrass4l/ w (540) 722-2219 fax if needed. http://www.plastic-solutlon.com ..... DETAIL: ' .......... ................................. .... ............... . Annual ryegrasS 50 lbs. 1.15 1/4-1/2 X - 11/1 X 11/1 X 8/15 Millet42/ 50 lbs. 1.15 1/2 X X X 36/ Applicable on slopes of 3:1 or flatter 37ARefer to figure A - Adopted from USDA, ARS Miscellaneous Publication #1475, January 1990 38,Between fall and spring seeding dates, use mulch only if ground is frozen and reseed when thawed 39,May be used as a nurse crop for late fall/early winter permanent seedings, add 56 lbs/ac. -to the permanent seeding mixture 40P aryland State Highway Administration Temporary Seed Mix -May be used as a nurse crop for mid -summer permanent seedings. Add 2 lbs/ac jlAo permanent seed mix. May be used as a nurse crop for mid -summer permanent seedings. Add 10 lbs/ac. 4210 the permanent seeding mix. STONE CONSTRUCTION i ACCESS i" Ss.# -2a As SHALT TJX } COURSE K V \-6' M N. 21A AG ;R=GAZE BAST= PROFIL SECTION A -A A. rtiiiihttttrtl water tap of 1 iricli must be utstaffed «idi a rllinummii 1 inch ballcock slltitoffvah-e styph-im a wasli hosemitln a diameter of 1.5 uiclites for adetitlate constant presstu°e. Wasl> water roust be carried ate; av Rom die entrance to au appros't d uettlui; 11 ea ttti remove se, III :ill seclhiieiit dial lie prcveiited ftani erlteiin, storm draiiis" ditclles or watercourse . PAVED WASH RACK NO SC,A,_r PERMANENT SEEDING MIXTURES Ps FOR THE PIEDMONT AREA TABLE 25 TOTAL LBS. PER ACRE MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL 175-200 LBS. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE %95-100% - IMPROVED PERENNIAL RYE GRASS 0-5% - KENTUCKY BLUEGRASS0-5% HIGH MAINTENANCE LAWN 1' C+' WN. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE ^TO"4i GENERAL SLOPE (3:1 OR LESS) - KENTUCKY 31 FESCUE CCPD':rRUCII N A, ,CESS - RED TOP GRASS ASPHALT PAVE WASHRACK - SEASONAL NURSE CROP* {4. a 1000 sf i r EXIST:NO r 2 a - KENTUCKY 31 FESCUE 2% is� PAv=F, IFN 2 LBS. - SEASONAL NURSE CROP* 20 LBS. - CROWN VETCH** 20 LBS. STANDARD 48 INCH RACK SHOWN TOTAL 150 LBS. *USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: FEBRUARY 16TH THROUGH APRIL 30TH. . . . . . . . . . . . ANNUAL RYE MAY 1ST THROUGH AUGUST 15TH . . . . . *V057 EXTEND FULLWIDTH e Pasirw DRA,NAuC NOVEMBER 1ST THROUGH FEBRUARY 15TH . . . . . . . . . . ANNUAL RYE ** SUBSTITUTE SERICEA LESPEDEZA FOR CROWNVETCH TO SEDIVENT THROUGH SEPTEMBER USE HULLED SERICEA, ALL CF INORESS AND EGRESS � TK%1 *'iP{ 7 G�ViCE IF FLATPEA IS USED IN LIEU OF CROWNVETCH, INCREASE RATE TO 30 LBS./ACRE. ALL LEGUME SEED MUST BE PROPERLY INNOCULATED. WEEPING LOVEGRASS MAY BE ADDED TO ANY SLOPE OR LOW MAINTENANCE MIX DURING WARMER SEEDING PERIODS; ADD 10- 20 LBS./ACRE IN MIXES. PLAI.� following establish - •- 12' VIN 400 DRAINAGE W crownvetch J IPC�511"VE TO SEDIVENT A `% 2 IRAPPING DEVICE .< .... -- :.. ", QUARTER SECTION REMOVABLE FOR CCESS SECTION A -A A. rtiiiihttttrtl water tap of 1 iricli must be utstaffed «idi a rllinummii 1 inch ballcock slltitoffvah-e styph-im a wasli hosemitln a diameter of 1.5 uiclites for adetitlate constant presstu°e. Wasl> water roust be carried ate; av Rom die entrance to au appros't d uettlui; 11 ea ttti remove se, III :ill seclhiieiit dial lie prcveiited ftani erlteiin, storm draiiis" ditclles or watercourse . PAVED WASH RACK NO SC,A,_r PERMANENT SEEDING MIXTURES Ps FOR THE PIEDMONT AREA TABLE 25 TOTAL LBS. PER ACRE MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL 175-200 LBS. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE %95-100% - IMPROVED PERENNIAL RYE GRASS 0-5% - KENTUCKY BLUEGRASS0-5% HIGH MAINTENANCE LAWN 200-250 LBS. - 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. 1000 sf TOTAL 150 LBS. LOW -MAINTENANCE SLOPE (STEEPER THAN 3:1) Tail fescue makes - KENTUCKY 31 FESCUE 108 LBS. - RED TOP GRASS 2 LBS. - SEASONAL NURSE CROP* 20 LBS. - CROWN VETCH** 20 LBS. STANDARD 48 INCH RACK SHOWN TOTAL 150 LBS. *USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: FEBRUARY 16TH THROUGH APRIL 30TH. . . . . . . . . . . . ANNUAL RYE MAY 1ST THROUGH AUGUST 15TH . . . . . . . . . . . . . . FOXTAIL MILLET AUGUST 16TH THROUGH OCTOBER 31ST. . . . . . . . . . .ANNUAL RYE NOVEMBER 1ST THROUGH FEBRUARY 15TH . . . . . . . . . . ANNUAL RYE ** SUBSTITUTE SERICEA LESPEDEZA FOR CROWNVETCH EAST OF FARMVILLE, VA (MAY THROUGH SEPTEMBER USE HULLED SERICEA, ALL OTHER PERIODS, USE UNHULLED SERICEA.) PLASTIC SOLUTIONS, INC. IF FLATPEA IS USED IN LIEU OF CROWNVETCH, INCREASE RATE TO 30 LBS./ACRE. ALL LEGUME SEED MUST BE PROPERLY INNOCULATED. WEEPING LOVEGRASS MAY BE ADDED TO ANY SLOPE OR LOW MAINTENANCE MIX DURING WARMER SEEDING PERIODS; ADD 10- 20 LBS./ACRE IN MIXES. J INFORMATION FROM TABLE 3.32-C OF THE VA ESC HANDBOOK IS PROVIDED BELOW FOR SEEDING SELECTION TOTAL LBS. PER ACRE MINIMUM CARE LAWN 200-250 LBS -COMMERCIAL OR RESIDENTIAL 90-100% KENTUCKY 31 OR TURF -TYPE TALL FESCUE 0-10% IMPROVED PERENNIAL RYEGRASS 0-10% KENTUCKY BLUEGRASS GENERAL SLOPE (3:1 OR LESS) 128 LBS KENTUCKY 31 FESCUE 2 LBS RED TOP GRASS 20 LBS SAEASONAL NURSE CROP ** ** USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: MARCH, APRIL THROUGH MAY 15TH ANNUAL RYE MAY 16TH THROUGH AUGUST 15TH FOXTAIL MILLET AUGUST 16TH THROUGH SEPTEMBER, OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY WINTER RYE FERTILIZER (10-20-10 OR EQ) SHALL BE APPLIED AT THE RATE OF 1000 LBS/ ACRE. AGRICULTURAL LIME SHALL BE APPLIED TO SEEDBEDS AT TTHE RATE OF 90 LBS/ 1000 SQ. FT. SUGGESTED TEMPORARY SEEDING MIXTURE FERTILIZER: 10-20-10 1,000 LBS/ACRE SEPTEMBER -FEBRUARY 15:50% ANNUAL RYE & 50% WINTER RYE 100 LBS/ACRE FEBRUARY 16 -APRIL 30: ANNUAL RYE 100 LBS/ACRE MAY -AUGUST: GERMAN MILLET 50 LBS/ACRE OTHER OPTIONS EXIST, SEE VA EROSION AND SEDIMENT CONTROL HANDBOOK. SUGGESTED PERMANENT SEEDING MIXTURE LIME: 2 TONS/ACRE FERTILIZER: 10-20-10 1,000 LBS/ACRE MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE MAY 16 -AUGUST 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, FOXTAIL MILLET 20 LBS/ACRE AUGUST 16 -OCTOBER: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE NOVEMBER -FEBRUARY: KENTUCKY 31 FESCUE 200 LBS/ACRE, WINTER RYE 20 LBS/ACRE I- PERMANENT SEEDINGPs FERTILIZATION &MAINTENANCE TABLE 24 Maintenance Fertilization for Permanent Seedlings Use Soil Test Recommendation or Rates Shown Below Seeding Mixture Formulation Lbs. per Lbs. per Time Mowing a. StormRaxTM Acre 1000 sf ! ROUND SERIES TRASH RACK Tail fescue makes 10-10-10 500 I CONCRETE MANHOLE 'Not closer than 3" up 70% or more or Q. STANDARD 48 INCH RACK SHOWN Z if occasional mowing of cover. 30-10-10 DIMENSIONS IN INCHES 9.2 fall i wo J HDPE STRUCTURAL PLASTIC BY ! Do not mow Crownvetch % PLASTIC SOLUTIONS, INC. V! U UQ �LU r W co J following establish - Service lespedeza 0-20-0 400 9.2 W crownvetch J Z A `% ment and every 45 T� Birdsfoot trefoil • e. 1 ", QUARTER SECTION REMOVABLE FOR CCESS years thereafter. I 1, In Not required. not Fairly uniform W W Fall the year y closer than 4" if stand of tall 5-10-10 500 11 5 following establish- occasional mowing is fescue & Service W O0 ment and every 4-5 desired, and then in lespedeza, or years thereafter. fall after seed has birdsfoot trefoil. matured. Not required. not weeping lovegrass j I PLAN SIDE VIEW ISOMETRIC closer than 4" if ... ...... ........ ......._...__........... StormRax ....... .... ..... ...................._.... _............... ............................ .............................. .. TM Round Series for Concrete Manhole CONCRETE STRUCTURE DIMENSIONS NS ONS ' - ---- - following establish- ................................ Part No.: -...... ._................ _... ............... ........ ._...__ _-._._._.._..-._..._.__..._... ................. Dim A Dim B Dim C Min ID Min OD --- -....._.__......_.__...........__...._.............. ........... ..._. INSIDE STRUCTURE DIMENSION 11.5 RS 24 1714 1414 28 24 30 OUTSIDE STRUCTURE DIMENSION RS -36 - --- 2114 14 3 $ 40 �a 36 43 RS -48 27," 18 54 48 57 AVAILABLE OPTIONS RS -60 2712 1814 66'i 60.... 70 - Mow no closer than _..__.____._._.._.._......_ .............._............ .. ... _. _....... 250 CROSS BRACING FOR OVERHANG 30 days later I fescue, Kentucky HDPE ANTI -VORTEX PLATE - Plastic Solutions, Inc. CUSTOMER: bluegrass, hard DATE. I ' Solutions� PO Box 4386, Winchester, VA 22604 238 McGhee Rd, Winchester, VA 22603 '----._.._..- ....... ........... fescue mixture: --- -- ................... DRAWN BY: 2.3 APP'D BY: " (877) 877-5727 phone PROJECT: w (540) 722-2219 fax if needed. http://www.plastic-solutlon.com ..... DETAIL: ' .......... ................................. .... ............... . I- PERMANENT SEEDINGPs FERTILIZATION &MAINTENANCE TABLE 24 Maintenance Fertilization for Permanent Seedlings Use Soil Test Recommendation or Rates Shown Below Seeding Mixture Formulation Lbs. per Lbs. per Time Mowing a. Acre 1000 sf N= O CO Tail fescue makes 10-10-10 500 11.5 Yearly, or as needed 'Not closer than 3" up 70% or more or Q. r Z if occasional mowing of cover. 30-10-10 400 9.2 fall is desired. wo J CL� Spring the year Do not mow Crownvetch 0� cQ W V! U UQ �LU r W co J following establish - Service lespedeza 0-20-0 400 9.2 W crownvetch J Z m Q QZ ment and every 45 T� Birdsfoot trefoil OC 0 d W years thereafter. 0 LL In Not required. not Fairly uniform W W Fall the year y closer than 4" if stand of tall 5-10-10 500 11 5 following establish- occasional mowing is fescue & Service W O0 ment and every 4-5 desired, and then in lespedeza, or years thereafter. fall after seed has birdsfoot trefoil. matured. Not required. not weeping lovegrass Spring the year closer than 4" if & serice lespedeza following establish- occasional mowing is fairly uniform 5-10-10 500 11.5 ment and every 3-4 desired, and fall plant distribution years thereafter. after sericea has matured. September, Mow no closer than Red & chewings 20-10-10 250 5.8 30 days later 2" for red fescue fescue, Kentucky and Ky bluegrass; bluegrass, hard December, and closer than 3" fescue mixture: 20-10-10 100 2.3 May 20 -June -30, Y forfescue. if needed. ROCK CHECK DAM@ STD. & SPEC. 113.20 N.TS. FILTER CL 0TH (OPTIONAL (DON'tVST)?EAff VIEW) VDOT #1 COARSE CLASS 1 RIPRAP SPACING BETWEEN CHECK DAMS L = THE DISTANCE SUCH THAT POINTS A AND B ARE OF EQUAL ELEVATION y ''. • A B m a� a L iii T f. "„ , ti gggg®*. •. IN SOURCE: VA. DSWC PLATE 3.20-1 SUPER SILT FENCE CONSISTS OF 2 ADJACENT FENCE SECTIONS SEPARATED 1-1.5 FEET )F CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPOKT) 1. SET THE STAKES 2. EXCA VA TE A 4 "X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6'MAX. FLOWr.i 4" J. STAPLE FILTER MATERIAL 4. BACKFILL AND COMPACT TO STAKES AND EXTEND THE EXCA VA TED SOIL. IT INTO THE TRENCH. �! I Gam✓ `_. / �FL6W SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) FLOW Apr POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVA770N) PLATE, 3.05-2 SOURCE.` Adopted from Installation of Straw and Fabric Filter Barriers for Sediment Control VA. DSWC Sherwood and Wyant oP PIPE OUTLET CONDITIONS OUTLET PROTECTION A A 3da do r PIPE OUTLET TO FLAT AREA WITH NO DEFINED J_ ; CHANNEL PLAN VIEW'` >_ La PIPE OUTLET SECTION A -A FILTER CLOTH KEY IN 6"-9"; RECOMMENDED MINIMUM FOR THE ENTIRE RIPRAP PERIMETER A PIPE OUTLET TD WELL DEFINED CHANNEL ID i �--" d +L (MIN.) c" •,.. . I."""".: PLAN VIEW SECTION A -A FILTER CLOTH KEY IN 6"-9 RECOMMENDED FOR ENTIRE PERIMETER NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RIPRAP, GABION BASKET, OR CONCRETE. 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.18-3 AND 3.18-4. 3. d 1.5' MINIMUM CLASS I STONE DEPTH Source: Va. DSWC U D j� Plate 3.18-1 /(j VAMulligan��Q��G� SILT FENCE OUTLET DETAIL oP (SPECIAL DESIGN) siLT F FENCE \ +, EXIST ,� GROUND \ .�. EXIST. ELEV. GROUND o- - _ %%% ELEV. '10 10. OUTLET CROSS SECTOIN 12" 1 ;; • ft PERSPECTIVE VIEW TYPICAL WATERWAY CROSS-SECTIONS COMPACTED SOIL :t TYPICAL CONCRETE LINED DITCH TYPICAL GRASS LINED DITCH TYPICAL VEE CROSS-SECTIONS --- T D PARABOLIC WATERWAY CROSS-SECTION TYPICAL RIRRAP CHANNEL $ W �.. c LOTH ) FILTER CLOTH NOTE: ALTHOUGH FILTER CLOTH IS PREFERED, A GRANULAR FILTER MAY BE SUBSTITUTED FOR FILTER CLOTH. ( FOR PHYSICAL REQUIREMENTS, SEE STD. & SPEC. 3.19, RIPRAP) TYPICAL CONCRETE CHANNEL EXPANSION JOINT A (90' SPACING) Iy .. 18„ A NOT TO SCALE #4_18^ DOWEL LOCATED AT JOINTS 6X6 WELDED WIRE FABRIC AS REQUIRED -0 X D W e--3" DIA. VNEEP HOLE, 8" o.c. SECTION A -A TRAPEZOIDAL WATERWAY CROSS-SECTIONS .,t_CTIONS SOURCE: VA. DSWC PLATE 3.17- SOURCE: VA. DSWC \I PLATE. 3.13-2 RISER PIPE BASE CONDITION, FOR WET POND CONVERSION CONCRETE BASE FOR PERMANENT RISER STRUCTURE MODIFIED FOR HEIGHT REQUIREMENTS F] 3D 3000 psi CONCRETE SOURCE: VA. DSWC(MODIFIED) PLATE. 3.14-14 OUTLET PROTECTION SPECIFICATIONS opi 3.5 C. C I 04 1 "M E W N E Y G .F OP2 04 APRON LENGTH = 8' AHRON LENGTH = 18' 15. C I 0P3104 "M E W N E Y G .F APRON LENGTH = 16' STIR #63 OUTFLOW <-- 15" Q10 = 2.68 cfS STIR #27A OUTFLOW F 30" 00 0= 37.0 CfS Q1 POND OUTFLOW E- 36" 0= 8.1 efs Q1 REVISIONS REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 U co ( a. wW `0 N= O CO 2 0 to c" NQ g � v, I.0) z0 J Q. r Z Q O M `W ; V W it 00 wo J CL� JZ 06 0 0� cQ W V! U UQ �LU r W co J N O Zr 3:CD UN O W J J Z m Q QZ cc T� OC 0 d W 0 LL In L W W cc cc Q. Zti W 2 1 W W O0 Z - REVISIONS REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 FILE NUMBER 8053 SHEET 10/14 NZ a. �W co 2 W v, J .Q Z Q Z 0.. W it W Q > 06 Z T V! U YO W J Jc m O W J J Z m Q QZ cc U OC o W DO J(j) O0 W FILE NUMBER 8053 SHEET 10/14 TYPICAL ORIENTATION OF TREATMENT - 1 (SOIL STABILIZATION BLANKET) cuAIIM Mid THERE IS A BERM AT THE TOP OF THE SLOPE. � OGTHE OVER THE BERM AND ANCHOR IT • year � •-�. - IN DITCHES, APPLY PROTECTIVE COVEHtNG PARALLEL TO THE DIRECTION OF FLOC"!. USE CHECK SLATS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH F AT ALL POrSSELL SOURCE: ADAPTED FROM LUDLOW PRODUCTS BROCHURE Existing Sediment Basin PUTT L: 3.30-1 OLD TRAIL SEDIMENT BASIN Block 14 Type 11 24 -hr 100 -yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 2/13/2015 HydroCAD® 10.00 s/n 08126 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 167.25 cfs @ 12.09 hrs, Volume= 12.322 af, Depth> 7.68" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -yr Rainfall=9.16" Area (ac) CN Description 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total OLD TRAIL SEDIMENT BASIN Block 14 Type 11 24 -hr 100 -yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 2/13/2015 HvdroCAD®10.00 s/n 08126 @2013 HydroCAD Software Solutions LLC Events for Pond 14P: 11-28-2014 Asbuilts Event Inflow Primary Elevation Storage (cfs) (cfs) (feet) (cubic -feet) 1 -yr 42.93 20.76 643.10 117,409 2 -yr 55.93 25.26 643.64 129,140 5 -yr 77.01 27.21 644.70 153,264 10 -yr 94.62 28.81 645.62 175,308 25 -yr 120.52 31.03 646.99 209,564 50 -yr 142.83 107.72 752.95 209,716 100 -yr 167.25 196.40 1,032.41 209,716 EROSION AND SEDIMENT CONTROL NARRATIVE PRIOR TO CONSTRUCTION 1.) CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE RIGHT-OF-WAY (VDOT LAND -USE PERMIT). 2.) CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP PERMITS, AS REQUIRED BY THE STATE DEPARTMENT OF CONSERVATION AND RECREATION(DCR). 3.) CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION. A PRECONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND SCHEDULING OF PRE -CONSTRUCTION MEETING. PROJECT DESCRIPTION THE PURPOSE OF THIS PROJECT IS TO CONSTRUCT EIGHTEEN SINGLE FAMILY DETACHED DWELLINGS, UTILITY SERVICES AND ROAD FRONTAGE AND SUBSEQUENT INFRASTRUCTURE. ALL EXISTING AND PROPOSED RUNOFF FROM THE DEVELOPMENT WITHIN THIS SECTION WILL OUTFALL TO THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS. THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS WERE SIZED TO ACCOMMODATE ALL OF THE NEW DEVELOPMENT ON THE SOUTHEASTERN SIDE OF OLD TRAIL DRIVE. ADDITIONAL DIVERSIONS SHALL BE INTRODUCED TO DIRECT AND CAPTURE ALL RUNOFF FROM ALL DENUDED AREAS. A CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION SHALL BE IMPLEMENTED AS THE FIRST STEPS TO DIRECT SEDIMENT LATENT WATER FROM THE DENUDED AREAS TO THE EXISTING SEDIMENT BASIN. THE LIMITS OF DISTURBANCE INCLUDES APPROXIMATELY 12 ACRES OF LAND DISTURBING ACTIVITIES; ALL LAND DISTURBING ACTIVITIES HEREIN ARE SURROUNDED BY EXISTING PAVED ROADS AND STORM SEWER, WHERE EXISTING RUN-OFF IS CONVEYED. EXISTING SITE CONDITIONS CURRENTLY THE DISTURBED AREA IS MOSTLY OPEN AND GRASS COVERED. THE EXISTING SEDIMENT BASIN IS CURRENTLY RECEIVING THE SITE'S RUNOFF, AND WILL CONTINUE TO DO SO THROUGHOUT CONSTRUCTION. THE INSTALLATION AND MAINTENANCE OF THE SILT FENCE AND INLET PROTECTION THROUGHOUT CONSTRUCTION IS CRITICAL TO PREVENTING SEDIMENT LATENT RUNOFF FROM EXITING THE SITE. THERE ARE ALSO SMALL PORTIONS OF THE ADJACENTLY GRADED, BUT STABILIZED AREAS TO THE NORTH OF THE SITE THAT DRAIN TO THE SEDIMENT BASIN. ADJACENT AREAS OLD TRAIL DRIVE FORMS THE WESTERN BORDER, TRIBUTARIES OF THE LICKINGHOLE CREEK LIE TO THE NORTH, AND EAST. BLOCK 15 OF THE OLD TRAIL SUBDIVISION LIES TO THE SOUTHEAST. STOCKPILE AREAS ARE LOCATED ON THE EASTERN SIDE OF BLOCKS 13 AND 14. STAGING AREAS WILL BE LOCATED IN EITHER FUTURE BLOCK 12, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND CLAREMONT LANE, OR IN FUTURE BLOCK 18, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND FIELDING RUN DRIVE. OFF-SITE AREAS NO CONSTRUCTION OUTSIDE THE LIMITS OF CLEARING AND GRADING SHOWN IS REQUIRED. ANY SURPLUS OR SHORTAGE SHALL BE BROUGHT TO OR OBTAINED FROM A SITE WITH APPROVED E&S MEASURES IN PLACE. ALL EXCESS MATERIAL SHALL BE HAULED TO AN APPROVED SITE WITH ADEQUATE EROSION CONTROL PROTECTION. AN OFF-SITE BORROW OR FILL SITE WILL NOT BE NECESSARY, SINCE THERE ARE STOCKPILE AREAS OF FILL NEAR THE CONSTRUCTION AREA (ADJACENT TO BLOCKS 13 AND 14). SOILS Q - ASHE LOAM - 15% TO 25% SOIL IS RELATIVELY DEEP, HEAVILY SLOPING AND SOMEWHAT EXCESSIVELY DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS VERY LOW TO HIGH AND WATER CAPACITY IS LOW. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 25B - DYKE SILT LOAM - 2% TO 7% SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY AND WATER CAPACITY ARE MODERATE. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 26C3 - DYKE CLAY LOAM - 7% TO 15%, SEVERELY ERODED SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 37D3 - HAYESVILLE CLAY LOAM - 15% TO 25%, SEVERELY ERODED SOIL IS DEEP, HEAVILY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. CRITICAL SLOPE AREAS CRITICAL SLOPE AREAS EXIST ON THIS SITE. MOST OF THE AREAS OF 'PRESERVED' CRITICAL SLOPE ARE LOCATED WITHIN THE 100' STREAM BUFFER AND NO LAND DISTURBING ACTIVITY WILL BE TAKING PLACE OVER THESE AREAS. THERE IS, HOWEVER, ABOUT A 200 S.F. AREA LOCATED JUST OUTSIDE OF THE 100' STREAM BUFFER THAT IS GOING TO HAVE LAND DISTURBANCE ACTIVITY TAKING PLACE ON IT. PARTICULAR CARE SHALL BE TAKEN ON THE FILL SLOPES AND DITCHES TO ENSURE ADEQUATE VEGETATION IS ESTABLISHED AND ALL DENUDED AREAS ARE PREVENTED UNCONTROLLED RUN OFF FROM GETTING INTO SLABTOWN BRANCH. EROSION AND SEDIMENT CONTROL MEASURES UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, LATEST EDITION. THE MINIMUM STANDARDS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE. STRUCTURAL PRACTICES 1. TEMPORARY CONSTRUCTION ENTRANCE (3.02) - TWO TEMPORARY CONSTRUCTION ENTRANCES SHALL BE INSTALLED WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND CLAREMONT LANE AND ALSO WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND FIELDING RUN DRIVE. 2. CONSTRUCTION ROAD STABILIZATION (3.03) - ACCESS ROADS, PARKING AREAS, AND OTHER ON-SITE VEHICLE TRANSPORTATION ROUTES SHALL BE STABILIZED WITH STONE IMMEDIATELY AFTER GRADING. 3. SILT FENCE BARRIER (3.05) - SILT FENCE BARRIERS WILL BE INSTALLED DOWNSLIDE OF AREAS WITH MINIMAL GRADES TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE ATTACHED SITE PLAN. 4. TEMPORARY DIVERSION DIKES (3.09) - A SYSTEM OF DIVERSION DIKES TO DIRECT FLOW INTO THE SEDIMENT BASIN WILL BE INSTALLED AS SHOWN ON THE PLAN. 5. TEMPORARY SEDIMENT TRAPS (3.13) - TEMPORARY SEDIMENT TRAPS ARE TO BE CONSTRUCTED TO PROTECT THE ADJACENT AREAS FROM RECIEVING SEDIMENT LADEN RUNOFF. AREAS THAT ARE NOT DENUDED SHALL BE DIVERTED FROM DRAINING INTO THE SEDIMENT TRAPS, UNTIL SUCH TIME THAT THE DISTURBED AREAS ARE DEVELOPED AND STABILIZED. ACTUAL LOCATIONS AND DIMENSIONS OF THE EMBANKMENTS AND SPILLWAYS ARE SHOWN ON THE SITE PLAN. CALCULATIONS FOR THE SEDIMENT TRAPS ARE SHOWN WITH THE DETAILS. 6. STORMWATER CONVEYANCE CHANNEL (3.171 - A SERIES OF CHANNELS SHALL BE CONSTRUCTED TO PROVIDE FOR THE CONVEYANCE OF CONCENTRATED RUNOFF TO A RECEIVING CHANNEL WITHOUT DAMAGE FROM EROSION. TYPICAL DITCH SECTIONS & CALCULATIONS ARE SHOWN ON THE PLAN. 7. CHECK DAM (3.20) SEVERAL ROCK CHECK DAMS WILL BE INSTALLED UPSLOPE OF THE SEDIMENT BASIN AND TRAPS TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS WHICH WILL HELP INCREASE THE EFFECTIVENESS OF THE SEDIMENT BASIN AND TRAPS. WHEN THE SEDIMENT REACHES THE CLEANOUT LEVEL, IT SHALL BE REMOVED AND PROPERLY DISPOSED OF. 8. STORMWATER CONVEYANCE CHANNELS: 1.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 1.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 1.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL. 9. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO INSURE TECH CENTER OF TECH DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 10. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. 11. THE STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED REGULARLY BY THE OWNER TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION. THE EMERGENCY SPILLWAY SHALL BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION RESISTANT. GRASS SHALL BE KEPT MOWN BELOW A HEIGHT OF 15" AND THE OUTLET SHOULD BE CHECKED FOR CLOGGING. VEGETATIVE PRACTICES 1. SURFACE ROUGHENING (3.291 - ALL AREAS WITH A GRADE STEEPER THAN 3:1 SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE 3,29-4) TO AID IN GRASS ESTABLISHMENT, INCREASE INFILTRATION, AND TO SLOW RUNOFF VELOCITIES_ 2. TOPSOILING & STOCKPILING (3.301 - TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED ALONG THE LOWER PERIMETER TO PROTECT DOWNSTREAM AREAS. 3. TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS SHALL BE STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 4. MULCH (3.35) - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL BE APPLIED TO DISTURBED SURFACES TO PREVENT EROSION AND REDUCE OVERLAND FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING OPERATIONS, OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH CANNOT BE SEEDED DUE TO THE SEASON BUT WHICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 5. EROSION CONTROL BLANKETS (3.36) - EROSION CONTROL BLANKETS WILL BE INSTALLED ON FILL SLOPES WITH A SLOPE GREATER THAN 2:1 FOLLOWING FINAL GRADING AND SEEDING. EROSION CONTROL BLANKETS WILL ALSO BE INSTALLED IN DITCHES WHERE POTENTIAL EROSIVE VELOCITIES MAY EXIST AS DETERMINED BY ENGINEERING CALCULATIONS. THIS WILL PROTECT FROM RILL AND GULLY EROSION. MANAGEMENT STRATEGIES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. 2. SEDIMENT TRAPPING MEASURES WILL BE INSTALLED AS THE FIRST STEP IN GRADING AND WILL BE SEEDED AND MULCHED IMMEDIATELY FOLLOWING INSTALLATION. 3. TEMPORARY SEEDING OR OTHER STABILIZATION WILL FOLLOW IMMEDIATELY AFTER GRADING. 4. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION' AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 5. WITHIN 30 DAYS AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL ADMINISTRATOR, THE TEMPORARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP OR REMOVED, AND ANY SEDIMENT TRAPS OR SEDIMENT BASINS CANL BE CLEANED OUT OR CONVERTED TO PERMANENT STORMWATER MANAGEMENT BASINS. PERMANENT STABILIZATION ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH STRAW & SEEDING IMMEDIATELY FOLLOWING FINISHED GRADING. SEEDING SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER AND LIME APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. TORMWATER RUNOFF CONSIDERATIONS CALCULATIONS OF RUNOFF BEFORE AND AFTER DEVELOPMENT INDICATE THAT THERE WILL BE A NET INCREASE IN RUNOFF VOLUME AS A RESULT OF THE INCREASE IN THE IMPERVIOUS SURFACES FOR THE DEVELOPMENT. THE EXISTING STORMWATER MANAGEMENT BASIN HAS BEEN DESIGNED TO TREAT AND RELEASE THE RUNOFF AT REDUCED RATES. REFER TO THE BLOCK 14 STORMWATER MANAGEMENT PLAN FOR DESIGN SIZING, CALCULATIONS, AND DESIGN DETAILS. MAINTENANCE IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL BUILDUP. IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS TO PREVENT TRANSPORTATION OF SOIL ONTO THE ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A WASH -RACK MAY BE REQUIRED. 2. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED. 3. DIVERSION DIKES SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET, OR SEDIMENT TRAPPING FACILITY AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEA SHALL HALL BE INSPECTED AND REPAIRS MADE IF NEEDED DAMS CAUSED AUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY. 4. STORMWATER CONVEYANCE CHANNELS: 4.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 4.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 4.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL. 5. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO ENSURE THAT THE CENTER OF THE CHECK DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 6. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED. EC SEQUENCE OF CONSTRUCTION 1.) CONTRACTOR SHALL VERIFY FUNCTIONALITY OF EXISTING SEDIMENT BASIN. CONTRACTOR SHALL THEN INSTALL CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION AS FIRST STEP IN CONSTRUCTION.(ASBUILTS HAVE BEEN PERFORMED TO VERIFY THE EXISTING BASIN VOLUME) 2.) CONTRACTOR SHALL COORDINATE INSPECTIONS, AS REQUIRED BY THE COUNTY OF ALBEMARLE 3.) CONTRACTOR SHALL ROUGH GRADE THE SITE, INSTALL SEDIMENT TRAPS, DIVERSIONS AND PERIMETER SILT FENCE AS SHOWN. 4.) CONTRACTOR SHALL INSTALL PROPOSED STORM SEWER TO CONVEY EXISTING UPSTREAM SITE RUNOFF TROUGH THE CONSTRUCTION AREA, AND BACK IN TO THE EXISTING PERIMETER DIVERSION DITCH INSTALLED AND MAINTAINED WITH BLOCK 14. ENSURE THAT THE EXISTING BLOCK 14 DIVERSION DITCH AND ACCOMPANYING FILL OPERATIONS MAINTAIN A CONTINUANCE CONVEYANCE CHANNEL INTO THE EXISTING SEDIMENT BASIN. 5.) BEGIN CLEARING, GRUBBING AND FINE GRADING OPERATIONS AS NECESSARY TO ACHIEVE FINAL GRADES. 6.) AFTER SITE HAS REACHED SUBGRADE CONDITIONS, INSTALL UTILITIES, REMAINING STORM SEWER AND BEGIN ROAD STABILIZATION AND CONSTRUCTION. 7.) PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY POR11ON 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 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN 60 DAYS. 8.) DURING SUMMER WEATHER WITH NO CHANCE OF RAINFALL, BEGIN SEDIMENT BASIN CONVERSION. COORDINATE WITH ENVIRONMENTAL INSPECTOR. SEE CONVERSION NOTES AND DETAILS. 9.) COORDINATE PERMANENT BERM SPECIFICATIONS WITH GEO-TECHNICAL ENGINEER. COMPACT BERM TO 95% COMPACTION AND/OR INSTALL CLAY CORE OR CUT-OFF TRENCH PER GEOTECH'S RECOMMENDATIONS. EXIST. BERM AND IMPROVEMENTS MUST BE CERTIFIED BY GEO-TECHNICAL ENGINEER. 9.) THE INITIAL STEP IN THE CONVERSION OF THE EXISTING SEDIMENT BASIN SHALL BE CONSTRUCTION OF THE FOREBAY. THE FOREBAY WILL ACT AS THE TEMPORARY RUNOFF CONTROL MEASURE DURING CONSTRUCTION OF THE PERMANENT FACILITY. BE SURE TO INSTALL OUTLET PROTECTION AT THE PIPE OUTFALL LOCATIONS SIMULTANEOUS WITH FOREBAY GRADING OPERATIONS. 10.) INSTALL FOREBAY WEIR WALL AND RIP -RAP TO FINALIZE IMPOUNDMENT AREA PRIOR TO REPLACEMENT OF CMP BARREL AND RISER, INCLUDING PROPOSED PERMANENT BMP APPURTENANCES. 11.) FINALIZE POND GRADING, INCLUDING AQUATIC BENCH, EMERGENCY SPILLWAY AND GRAVELED MAINTENANCE ACCESS DRIVE. INSTALL ORIFII, WEIR AND ANTI -VORTEX DEVICE. ALLOW FOR THE APPLICATION OF 6"-8" OF TOPSOIL WHEN PREPARING FINAL GRADES. 12.) STABILIZE STEEPER SLOPES WITH WITH SOIL MATTING AS NECESSARY TO PROVIDE VEGETATIVE COVER. 13.) ONCE PERMISSION IS OBTAINED FROM THE EROSION CONTROL INSPECTOR, REMOVE SILT FENCING, INLET PROTECTION AND OTHER EC MEASURES. EROSION AND SEDIMENT CONTROL QUANTITIES S/q 3.01 000_0= SAFETY FENCE 796 L.F. CC PAVED CONSTRUCTION 2 TOTAL C 3.02 ENTRANCE W/ WASH RACK CRS 3.03 CONSTRUCTION ROAD 38,400 S.F. STABILIZATION S F 3.05 X SILT FENCE 2,412 L.F. CALCULATIONS pv 3.12 ■� DIVERSION 1,353 L.F. PLEASE REFER TO THE DETAILS, STORM SEWER AND HYDRAULIC CALCULATIONS FOR THE PERFORMANCE OF THE STORM SEWER, DITCHES, ASBUILT SEDIMENT BASIN AND SEDIMENT TRAPS. ALSO REFER TO THE WATER QUALITY CALCULATIONS FOR ST 3.13 SEDIMENT TRAP 2 EACH COMPLIANCE WITH THE CBPA REGULATIONS AND THE CORRESPONDING Retention 856 c.y. Basin III SPECIFICATIONS AND THE REQUIRED 1.5, 2 AND 10 YEAR PRE -DEVELOPED DETENTION PROVIDED TO MEET THE MS -19 CRITERIA, ASSUMING GOOD FORESTED S B 2,815 c.y. CONDITIONS. 3.13 SEDIMENT BASIN Existing SEDIMENT BASIN NARRATIVE Taken from WP0201300021 • THIS IS A MODIFICATION TO A SEDIMENT BASIN ESTABLISHED CD 3.20 ROCK CHECK DAMS 5 TOTAL WITH WPO -2012-0013. THE GEOMETRY OF THE OUTLET STRUCTURE HAS BEEN PRESERVED. MODIFIED CHECK DAM • THE BASIN HAS BEEN ENLARGED TO RECEIVE RUNOFF FROM MOP 3.20 .>> - W/ SILT FENCE 3 TOTAL 19.25 ACRES IN VARIOUS STAGES OF CONSTRUCTION. (SEE DETAIL) EXCAVATION IS BASED ON CREATING A BASIN LARGE ENOUGH TO ALLOW THE CONSTRUCTION OF A COMBINATION TS 3.31 TS TEMPORARY SEEDING 124,283 S.F. BASIN / FOREBAY BIOFILTER. THE FUTURE SURFACE •• ENLARGED TO ALLOW THECONSTRUCTION N OF 636.0 A TRUCTION OFA I- �7 3.32 PS PERMANENT SEEDING 244,843 S.F. LARGER BIOFILTER, AND FOREBAY. TOTAL DISTURBED AREA = 23.5 ACRES •• THE BASE OF THE SEDIMENT BASIN (635.0) WAS SEQUENCE OF CONSTRUC Taken from WP0201300021) ADJUSTED TO PROVIDE WET STORAGE. 1: INSTALL CONSTRUCTION ENTRANCE. • THE VOLUMES PROVIDED AT THE RISER, AND ORIFICE MEET 2: SEDIMENT BASIN EXCAVATION. EXCESS MATERIAL WILL BE USED TO OR EXCEED STORAGE REQUIREMENTS FOR A SEDIMENT ESTABLISH THE 3:1 SLOPES UPHILL FROM THE EXISTING BASIN. BASIN. APPLY FERTILIZER, TEMPRARY SEEDING, NAD MULCH. • SCS ROUTINGS DEMONSTRATE THE STORAGE VOLUME, 3: DITCH CONSTRUCTION SHALL BEGIN AT THE SEDIMENT BASIN, AND ORIFICE, AND RISER ALLOW FOR THE FULLY DEVELOPED PROCEED UPHILL. NO MORE THAN 500' OF DITCH SHALL BE 25 -YEAR STORM TO PASS WITHOUT EXCEEDING THE UNDER CONSTRUCTION AT ANY GIVEN TIME. ELEVATION OF THE EMERGENCY SPILLWAY. A) SILT FENCE SHALL BE INSTALLED ON THE DOWNHILL SIDE. • THE PROPOSED GEOMETRY PROVIDES ADEQUATE STORAGE B) CONSTRUCT THE DIVERSION. TO LIMIT DISCHARGE RATES TO THOSE SPECIFIED IN VA C) FINAL GRADE THE BERM, AND DITCH BOTTOM. 10.1-561. D) INSTALL DITCH LININGS AND CHECK DAMS • THE 24" OUTLET, AND BERM GEOMETRY IS TO BE E) SEED, FERTILIZE, AND MULCH. PRESERVED UPON CONVERSION TO A COMBINATION BASIN / Sediment Basin was As -built December 2014 FOREBAY /BIOFILTER. ���Z,TH op Lr� O - � Christopher C. Mulligan Lic. No. '0 031672 G / 0 N A L 019 BMW MATERIAL DOM TO A LEVEL AREA BEFORE •••. .•: •..�' ' TERMNATNG THE INSTALLATION. TURN THE END •; prr•«' '� �,�s'.,1 i'w ttsi' • ,�.M ,;y,,;�.;;�., UNDER C AND STAPLE AT 1Y INTERVALS.tz& iY, at• �I w r At IN DITCHES, APPLY PROTECTIVE COVEHtNG PARALLEL TO THE DIRECTION OF FLOC"!. USE CHECK SLATS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH F AT ALL POrSSELL SOURCE: ADAPTED FROM LUDLOW PRODUCTS BROCHURE Existing Sediment Basin PUTT L: 3.30-1 OLD TRAIL SEDIMENT BASIN Block 14 Type 11 24 -hr 100 -yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 2/13/2015 HydroCAD® 10.00 s/n 08126 © 2013 HydroCAD Software Solutions LLC Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff = 167.25 cfs @ 12.09 hrs, Volume= 12.322 af, Depth> 7.68" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -yr Rainfall=9.16" Area (ac) CN Description 19.250 88 Fallow, bare soil, HSG B/C 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0.0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68" 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total OLD TRAIL SEDIMENT BASIN Block 14 Type 11 24 -hr 100 -yr Rainfall=9.16" Prepared by Hewlett-Packard Company Printed 2/13/2015 HvdroCAD®10.00 s/n 08126 @2013 HydroCAD Software Solutions LLC Events for Pond 14P: 11-28-2014 Asbuilts Event Inflow Primary Elevation Storage (cfs) (cfs) (feet) (cubic -feet) 1 -yr 42.93 20.76 643.10 117,409 2 -yr 55.93 25.26 643.64 129,140 5 -yr 77.01 27.21 644.70 153,264 10 -yr 94.62 28.81 645.62 175,308 25 -yr 120.52 31.03 646.99 209,564 50 -yr 142.83 107.72 752.95 209,716 100 -yr 167.25 196.40 1,032.41 209,716 EROSION AND SEDIMENT CONTROL NARRATIVE PRIOR TO CONSTRUCTION 1.) CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE RIGHT-OF-WAY (VDOT LAND -USE PERMIT). 2.) CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP PERMITS, AS REQUIRED BY THE STATE DEPARTMENT OF CONSERVATION AND RECREATION(DCR). 3.) CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION. A PRECONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND SCHEDULING OF PRE -CONSTRUCTION MEETING. PROJECT DESCRIPTION THE PURPOSE OF THIS PROJECT IS TO CONSTRUCT EIGHTEEN SINGLE FAMILY DETACHED DWELLINGS, UTILITY SERVICES AND ROAD FRONTAGE AND SUBSEQUENT INFRASTRUCTURE. ALL EXISTING AND PROPOSED RUNOFF FROM THE DEVELOPMENT WITHIN THIS SECTION WILL OUTFALL TO THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS. THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS WERE SIZED TO ACCOMMODATE ALL OF THE NEW DEVELOPMENT ON THE SOUTHEASTERN SIDE OF OLD TRAIL DRIVE. ADDITIONAL DIVERSIONS SHALL BE INTRODUCED TO DIRECT AND CAPTURE ALL RUNOFF FROM ALL DENUDED AREAS. A CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION SHALL BE IMPLEMENTED AS THE FIRST STEPS TO DIRECT SEDIMENT LATENT WATER FROM THE DENUDED AREAS TO THE EXISTING SEDIMENT BASIN. THE LIMITS OF DISTURBANCE INCLUDES APPROXIMATELY 12 ACRES OF LAND DISTURBING ACTIVITIES; ALL LAND DISTURBING ACTIVITIES HEREIN ARE SURROUNDED BY EXISTING PAVED ROADS AND STORM SEWER, WHERE EXISTING RUN-OFF IS CONVEYED. EXISTING SITE CONDITIONS CURRENTLY THE DISTURBED AREA IS MOSTLY OPEN AND GRASS COVERED. THE EXISTING SEDIMENT BASIN IS CURRENTLY RECEIVING THE SITE'S RUNOFF, AND WILL CONTINUE TO DO SO THROUGHOUT CONSTRUCTION. THE INSTALLATION AND MAINTENANCE OF THE SILT FENCE AND INLET PROTECTION THROUGHOUT CONSTRUCTION IS CRITICAL TO PREVENTING SEDIMENT LATENT RUNOFF FROM EXITING THE SITE. THERE ARE ALSO SMALL PORTIONS OF THE ADJACENTLY GRADED, BUT STABILIZED AREAS TO THE NORTH OF THE SITE THAT DRAIN TO THE SEDIMENT BASIN. ADJACENT AREAS OLD TRAIL DRIVE FORMS THE WESTERN BORDER, TRIBUTARIES OF THE LICKINGHOLE CREEK LIE TO THE NORTH, AND EAST. BLOCK 15 OF THE OLD TRAIL SUBDIVISION LIES TO THE SOUTHEAST. STOCKPILE AREAS ARE LOCATED ON THE EASTERN SIDE OF BLOCKS 13 AND 14. STAGING AREAS WILL BE LOCATED IN EITHER FUTURE BLOCK 12, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND CLAREMONT LANE, OR IN FUTURE BLOCK 18, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND FIELDING RUN DRIVE. OFF-SITE AREAS NO CONSTRUCTION OUTSIDE THE LIMITS OF CLEARING AND GRADING SHOWN IS REQUIRED. ANY SURPLUS OR SHORTAGE SHALL BE BROUGHT TO OR OBTAINED FROM A SITE WITH APPROVED E&S MEASURES IN PLACE. ALL EXCESS MATERIAL SHALL BE HAULED TO AN APPROVED SITE WITH ADEQUATE EROSION CONTROL PROTECTION. AN OFF-SITE BORROW OR FILL SITE WILL NOT BE NECESSARY, SINCE THERE ARE STOCKPILE AREAS OF FILL NEAR THE CONSTRUCTION AREA (ADJACENT TO BLOCKS 13 AND 14). SOILS Q - ASHE LOAM - 15% TO 25% SOIL IS RELATIVELY DEEP, HEAVILY SLOPING AND SOMEWHAT EXCESSIVELY DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS VERY LOW TO HIGH AND WATER CAPACITY IS LOW. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 25B - DYKE SILT LOAM - 2% TO 7% SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY AND WATER CAPACITY ARE MODERATE. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 26C3 - DYKE CLAY LOAM - 7% TO 15%, SEVERELY ERODED SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 37D3 - HAYESVILLE CLAY LOAM - 15% TO 25%, SEVERELY ERODED SOIL IS DEEP, HEAVILY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. CRITICAL SLOPE AREAS CRITICAL SLOPE AREAS EXIST ON THIS SITE. MOST OF THE AREAS OF 'PRESERVED' CRITICAL SLOPE ARE LOCATED WITHIN THE 100' STREAM BUFFER AND NO LAND DISTURBING ACTIVITY WILL BE TAKING PLACE OVER THESE AREAS. THERE IS, HOWEVER, ABOUT A 200 S.F. AREA LOCATED JUST OUTSIDE OF THE 100' STREAM BUFFER THAT IS GOING TO HAVE LAND DISTURBANCE ACTIVITY TAKING PLACE ON IT. PARTICULAR CARE SHALL BE TAKEN ON THE FILL SLOPES AND DITCHES TO ENSURE ADEQUATE VEGETATION IS ESTABLISHED AND ALL DENUDED AREAS ARE PREVENTED UNCONTROLLED RUN OFF FROM GETTING INTO SLABTOWN BRANCH. EROSION AND SEDIMENT CONTROL MEASURES UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, LATEST EDITION. THE MINIMUM STANDARDS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE. STRUCTURAL PRACTICES 1. TEMPORARY CONSTRUCTION ENTRANCE (3.02) - TWO TEMPORARY CONSTRUCTION ENTRANCES SHALL BE INSTALLED WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND CLAREMONT LANE AND ALSO WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND FIELDING RUN DRIVE. 2. CONSTRUCTION ROAD STABILIZATION (3.03) - ACCESS ROADS, PARKING AREAS, AND OTHER ON-SITE VEHICLE TRANSPORTATION ROUTES SHALL BE STABILIZED WITH STONE IMMEDIATELY AFTER GRADING. 3. SILT FENCE BARRIER (3.05) - SILT FENCE BARRIERS WILL BE INSTALLED DOWNSLIDE OF AREAS WITH MINIMAL GRADES TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE ATTACHED SITE PLAN. 4. TEMPORARY DIVERSION DIKES (3.09) - A SYSTEM OF DIVERSION DIKES TO DIRECT FLOW INTO THE SEDIMENT BASIN WILL BE INSTALLED AS SHOWN ON THE PLAN. 5. TEMPORARY SEDIMENT TRAPS (3.13) - TEMPORARY SEDIMENT TRAPS ARE TO BE CONSTRUCTED TO PROTECT THE ADJACENT AREAS FROM RECIEVING SEDIMENT LADEN RUNOFF. AREAS THAT ARE NOT DENUDED SHALL BE DIVERTED FROM DRAINING INTO THE SEDIMENT TRAPS, UNTIL SUCH TIME THAT THE DISTURBED AREAS ARE DEVELOPED AND STABILIZED. ACTUAL LOCATIONS AND DIMENSIONS OF THE EMBANKMENTS AND SPILLWAYS ARE SHOWN ON THE SITE PLAN. CALCULATIONS FOR THE SEDIMENT TRAPS ARE SHOWN WITH THE DETAILS. 6. STORMWATER CONVEYANCE CHANNEL (3.171 - A SERIES OF CHANNELS SHALL BE CONSTRUCTED TO PROVIDE FOR THE CONVEYANCE OF CONCENTRATED RUNOFF TO A RECEIVING CHANNEL WITHOUT DAMAGE FROM EROSION. TYPICAL DITCH SECTIONS & CALCULATIONS ARE SHOWN ON THE PLAN. 7. CHECK DAM (3.20) SEVERAL ROCK CHECK DAMS WILL BE INSTALLED UPSLOPE OF THE SEDIMENT BASIN AND TRAPS TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS WHICH WILL HELP INCREASE THE EFFECTIVENESS OF THE SEDIMENT BASIN AND TRAPS. WHEN THE SEDIMENT REACHES THE CLEANOUT LEVEL, IT SHALL BE REMOVED AND PROPERLY DISPOSED OF. 8. STORMWATER CONVEYANCE CHANNELS: 1.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 1.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 1.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL. 9. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO INSURE TECH CENTER OF TECH DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 10. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. 11. THE STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED REGULARLY BY THE OWNER TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION. THE EMERGENCY SPILLWAY SHALL BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION RESISTANT. GRASS SHALL BE KEPT MOWN BELOW A HEIGHT OF 15" AND THE OUTLET SHOULD BE CHECKED FOR CLOGGING. VEGETATIVE PRACTICES 1. SURFACE ROUGHENING (3.291 - ALL AREAS WITH A GRADE STEEPER THAN 3:1 SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE 3,29-4) TO AID IN GRASS ESTABLISHMENT, INCREASE INFILTRATION, AND TO SLOW RUNOFF VELOCITIES_ 2. TOPSOILING & STOCKPILING (3.301 - TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED ALONG THE LOWER PERIMETER TO PROTECT DOWNSTREAM AREAS. 3. TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS SHALL BE STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 4. MULCH (3.35) - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL BE APPLIED TO DISTURBED SURFACES TO PREVENT EROSION AND REDUCE OVERLAND FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING OPERATIONS, OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH CANNOT BE SEEDED DUE TO THE SEASON BUT WHICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 5. EROSION CONTROL BLANKETS (3.36) - EROSION CONTROL BLANKETS WILL BE INSTALLED ON FILL SLOPES WITH A SLOPE GREATER THAN 2:1 FOLLOWING FINAL GRADING AND SEEDING. EROSION CONTROL BLANKETS WILL ALSO BE INSTALLED IN DITCHES WHERE POTENTIAL EROSIVE VELOCITIES MAY EXIST AS DETERMINED BY ENGINEERING CALCULATIONS. THIS WILL PROTECT FROM RILL AND GULLY EROSION. MANAGEMENT STRATEGIES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. 2. SEDIMENT TRAPPING MEASURES WILL BE INSTALLED AS THE FIRST STEP IN GRADING AND WILL BE SEEDED AND MULCHED IMMEDIATELY FOLLOWING INSTALLATION. 3. TEMPORARY SEEDING OR OTHER STABILIZATION WILL FOLLOW IMMEDIATELY AFTER GRADING. 4. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION' AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 5. WITHIN 30 DAYS AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL ADMINISTRATOR, THE TEMPORARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP OR REMOVED, AND ANY SEDIMENT TRAPS OR SEDIMENT BASINS CANL BE CLEANED OUT OR CONVERTED TO PERMANENT STORMWATER MANAGEMENT BASINS. PERMANENT STABILIZATION ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH STRAW & SEEDING IMMEDIATELY FOLLOWING FINISHED GRADING. SEEDING SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER AND LIME APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. TORMWATER RUNOFF CONSIDERATIONS CALCULATIONS OF RUNOFF BEFORE AND AFTER DEVELOPMENT INDICATE THAT THERE WILL BE A NET INCREASE IN RUNOFF VOLUME AS A RESULT OF THE INCREASE IN THE IMPERVIOUS SURFACES FOR THE DEVELOPMENT. THE EXISTING STORMWATER MANAGEMENT BASIN HAS BEEN DESIGNED TO TREAT AND RELEASE THE RUNOFF AT REDUCED RATES. REFER TO THE BLOCK 14 STORMWATER MANAGEMENT PLAN FOR DESIGN SIZING, CALCULATIONS, AND DESIGN DETAILS. MAINTENANCE IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL BUILDUP. IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS TO PREVENT TRANSPORTATION OF SOIL ONTO THE ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A WASH -RACK MAY BE REQUIRED. 2. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED. 3. DIVERSION DIKES SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET, OR SEDIMENT TRAPPING FACILITY AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEA SHALL HALL BE INSPECTED AND REPAIRS MADE IF NEEDED DAMS CAUSED AUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY. 4. STORMWATER CONVEYANCE CHANNELS: 4.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 4.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 4.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL. 5. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO ENSURE THAT THE CENTER OF THE CHECK DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 6. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED. EC SEQUENCE OF CONSTRUCTION 1.) CONTRACTOR SHALL VERIFY FUNCTIONALITY OF EXISTING SEDIMENT BASIN. CONTRACTOR SHALL THEN INSTALL CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION AS FIRST STEP IN CONSTRUCTION.(ASBUILTS HAVE BEEN PERFORMED TO VERIFY THE EXISTING BASIN VOLUME) 2.) CONTRACTOR SHALL COORDINATE INSPECTIONS, AS REQUIRED BY THE COUNTY OF ALBEMARLE 3.) CONTRACTOR SHALL ROUGH GRADE THE SITE, INSTALL SEDIMENT TRAPS, DIVERSIONS AND PERIMETER SILT FENCE AS SHOWN. 4.) CONTRACTOR SHALL INSTALL PROPOSED STORM SEWER TO CONVEY EXISTING UPSTREAM SITE RUNOFF TROUGH THE CONSTRUCTION AREA, AND BACK IN TO THE EXISTING PERIMETER DIVERSION DITCH INSTALLED AND MAINTAINED WITH BLOCK 14. ENSURE THAT THE EXISTING BLOCK 14 DIVERSION DITCH AND ACCOMPANYING FILL OPERATIONS MAINTAIN A CONTINUANCE CONVEYANCE CHANNEL INTO THE EXISTING SEDIMENT BASIN. 5.) BEGIN CLEARING, GRUBBING AND FINE GRADING OPERATIONS AS NECESSARY TO ACHIEVE FINAL GRADES. 6.) AFTER SITE HAS REACHED SUBGRADE CONDITIONS, INSTALL UTILITIES, REMAINING STORM SEWER AND BEGIN ROAD STABILIZATION AND CONSTRUCTION. 7.) PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY POR11ON 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 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN 60 DAYS. 8.) DURING SUMMER WEATHER WITH NO CHANCE OF RAINFALL, BEGIN SEDIMENT BASIN CONVERSION. COORDINATE WITH ENVIRONMENTAL INSPECTOR. SEE CONVERSION NOTES AND DETAILS. 9.) COORDINATE PERMANENT BERM SPECIFICATIONS WITH GEO-TECHNICAL ENGINEER. COMPACT BERM TO 95% COMPACTION AND/OR INSTALL CLAY CORE OR CUT-OFF TRENCH PER GEOTECH'S RECOMMENDATIONS. EXIST. BERM AND IMPROVEMENTS MUST BE CERTIFIED BY GEO-TECHNICAL ENGINEER. 9.) THE INITIAL STEP IN THE CONVERSION OF THE EXISTING SEDIMENT BASIN SHALL BE CONSTRUCTION OF THE FOREBAY. THE FOREBAY WILL ACT AS THE TEMPORARY RUNOFF CONTROL MEASURE DURING CONSTRUCTION OF THE PERMANENT FACILITY. BE SURE TO INSTALL OUTLET PROTECTION AT THE PIPE OUTFALL LOCATIONS SIMULTANEOUS WITH FOREBAY GRADING OPERATIONS. 10.) INSTALL FOREBAY WEIR WALL AND RIP -RAP TO FINALIZE IMPOUNDMENT AREA PRIOR TO REPLACEMENT OF CMP BARREL AND RISER, INCLUDING PROPOSED PERMANENT BMP APPURTENANCES. 11.) FINALIZE POND GRADING, INCLUDING AQUATIC BENCH, EMERGENCY SPILLWAY AND GRAVELED MAINTENANCE ACCESS DRIVE. INSTALL ORIFII, WEIR AND ANTI -VORTEX DEVICE. ALLOW FOR THE APPLICATION OF 6"-8" OF TOPSOIL WHEN PREPARING FINAL GRADES. 12.) STABILIZE STEEPER SLOPES WITH WITH SOIL MATTING AS NECESSARY TO PROVIDE VEGETATIVE COVER. 13.) ONCE PERMISSION IS OBTAINED FROM THE EROSION CONTROL INSPECTOR, REMOVE SILT FENCING, INLET PROTECTION AND OTHER EC MEASURES. EROSION AND SEDIMENT CONTROL QUANTITIES S/q 3.01 000_0= SAFETY FENCE 796 L.F. CC PAVED CONSTRUCTION 2 TOTAL C 3.02 ENTRANCE W/ WASH RACK CRS 3.03 CONSTRUCTION ROAD 38,400 S.F. STABILIZATION S F 3.05 X SILT FENCE 2,412 L.F. CALCULATIONS pv 3.12 ■� DIVERSION 1,353 L.F. PLEASE REFER TO THE DETAILS, STORM SEWER AND HYDRAULIC CALCULATIONS FOR THE PERFORMANCE OF THE STORM SEWER, DITCHES, ASBUILT SEDIMENT BASIN AND SEDIMENT TRAPS. ALSO REFER TO THE WATER QUALITY CALCULATIONS FOR ST 3.13 SEDIMENT TRAP 2 EACH COMPLIANCE WITH THE CBPA REGULATIONS AND THE CORRESPONDING Retention 856 c.y. Basin III SPECIFICATIONS AND THE REQUIRED 1.5, 2 AND 10 YEAR PRE -DEVELOPED DETENTION PROVIDED TO MEET THE MS -19 CRITERIA, ASSUMING GOOD FORESTED S B 2,815 c.y. CONDITIONS. 3.13 SEDIMENT BASIN Existing SEDIMENT BASIN NARRATIVE Taken from WP0201300021 • THIS IS A MODIFICATION TO A SEDIMENT BASIN ESTABLISHED CD 3.20 ROCK CHECK DAMS 5 TOTAL WITH WPO -2012-0013. THE GEOMETRY OF THE OUTLET STRUCTURE HAS BEEN PRESERVED. MODIFIED CHECK DAM • THE BASIN HAS BEEN ENLARGED TO RECEIVE RUNOFF FROM MOP 3.20 .>> - W/ SILT FENCE 3 TOTAL 19.25 ACRES IN VARIOUS STAGES OF CONSTRUCTION. (SEE DETAIL) EXCAVATION IS BASED ON CREATING A BASIN LARGE ENOUGH TO ALLOW THE CONSTRUCTION OF A COMBINATION TS 3.31 TS TEMPORARY SEEDING 124,283 S.F. BASIN / FOREBAY BIOFILTER. THE FUTURE SURFACE •• ENLARGED TO ALLOW THECONSTRUCTION N OF 636.0 A TRUCTION OFA I- �7 3.32 PS PERMANENT SEEDING 244,843 S.F. LARGER BIOFILTER, AND FOREBAY. TOTAL DISTURBED AREA = 23.5 ACRES •• THE BASE OF THE SEDIMENT BASIN (635.0) WAS SEQUENCE OF CONSTRUC Taken from WP0201300021) ADJUSTED TO PROVIDE WET STORAGE. 1: INSTALL CONSTRUCTION ENTRANCE. • THE VOLUMES PROVIDED AT THE RISER, AND ORIFICE MEET 2: SEDIMENT BASIN EXCAVATION. EXCESS MATERIAL WILL BE USED TO OR EXCEED STORAGE REQUIREMENTS FOR A SEDIMENT ESTABLISH THE 3:1 SLOPES UPHILL FROM THE EXISTING BASIN. BASIN. APPLY FERTILIZER, TEMPRARY SEEDING, NAD MULCH. • SCS ROUTINGS DEMONSTRATE THE STORAGE VOLUME, 3: DITCH CONSTRUCTION SHALL BEGIN AT THE SEDIMENT BASIN, AND ORIFICE, AND RISER ALLOW FOR THE FULLY DEVELOPED PROCEED UPHILL. NO MORE THAN 500' OF DITCH SHALL BE 25 -YEAR STORM TO PASS WITHOUT EXCEEDING THE UNDER CONSTRUCTION AT ANY GIVEN TIME. ELEVATION OF THE EMERGENCY SPILLWAY. A) SILT FENCE SHALL BE INSTALLED ON THE DOWNHILL SIDE. • THE PROPOSED GEOMETRY PROVIDES ADEQUATE STORAGE B) CONSTRUCT THE DIVERSION. TO LIMIT DISCHARGE RATES TO THOSE SPECIFIED IN VA C) FINAL GRADE THE BERM, AND DITCH BOTTOM. 10.1-561. D) INSTALL DITCH LININGS AND CHECK DAMS • THE 24" OUTLET, AND BERM GEOMETRY IS TO BE E) SEED, FERTILIZE, AND MULCH. PRESERVED UPON CONVERSION TO A COMBINATION BASIN / Sediment Basin was As -built December 2014 FOREBAY /BIOFILTER. ���Z,TH op Lr� O - � Christopher C. Mulligan Lic. No. '0 031672 G / 0 N A L 019 REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 NZ • U Z a w � O q wW CidQ V ®LU 2 IX 0 Z Q V) w Cc 111 W Z V Z 2 N 0 co N m NQ �% g� Q� ?O Cc LU >@) �U L4o JZ Cc J WN WM VQ W J N LO cb U N Cc O co y0OLL J , LLW L0 No 0::�, I..- O p ti aW M 01 IRT Q� Tt 0 W O a. .� WWW REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 FILE NUMBER 8053 SHEET 11/14 NZ .a Y Z .� WWW W Z /_ F- Q 'Q z > W W Q Z 06 Z 0 Cc YO � J MJ C0 LW F- W W J J0 _ 0 Z m Q Qz �0 U F- 0 W 00 .j C0 0° W FILE NUMBER 8053 SHEET 11/14 STREAM BUFFER MITIGATION RESTORATION REQUIREMENTS STREAM BUFFER AREA DISTURBED = 21,500 SF (0.49 AC) MITIGATION AREA REQUIRED = 43,000 SF (0.99 AC) MITIGATION AREA PROVIDED = 43,026 SF (0.99 AC) MITIGATION AREA 1 = 8,968 SF (0.21 AC) COMMON NAME REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 254 BARE ROOT SEEDLINGS RED MAPLE MITIGATION AREA 2 = 11,526 SF (0.26 AC) 105 Celtis occidentalis REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 315 BARE ROOT SEEDLINGS TULIP POPLAR MITIGATION AREA 3 = 16,607 SF (0.38 AC) 175 Plata nus occidentalis REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 460 BARE ROOT SEEDLINGS Panicum virgatum MITIGATION AREA 4 = 5925 SF (0.14 AC) 3 REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 165 BARE ROOOT SEEDLINGS AREA 1 PLANT SCHEDULE -- TREES (MITIGATION AREAS 1-3) QNTY. BOTANICAL NAME COMMON NAME SIZE/ COMMENTS 90 Acernegundo BOX ELDER 1 -YEAR OLD BARE -ROOT SEEDLINGS 175 Acern rum RED MAPLE 120 Betula nigra RIVER BIRCH 105 Celtis occidentalis COMMON HACKBERRY 90 Juglans nigra BLACK WALNUT 115 Liquidambarstyraciflua SWEETGUM 135 Liriodendron tulipifera TULIP POPLAR 110 Nyssa sylvatica BLACKGUM 175 Plata nus occidentalis AMERICAN SYCAMORE 145 Quercus phellos WILLOW OAK PLANT SCHEDULE -- SEEDING MIX % OF MIX I BOTANICAL NAME I COMMON NAME COMMENT 22 Chasmanthium latifolium RIVER OATS GROWN UNDER 15 Sorghastrum nutans INDIANGRASS AND 15 Elymus virginicus VIRGINIA WILDRYE SHALL BE PLANTED NO CLOSER 8 Panicum rigidulum REDTOP PANICGRASS TOP OF THE STREAM BANK 8 Andropogongerardii BIG BLUESTEM 20 LBS. PER ACRE WITH A 30 7 Panicum anceps BEAKED PANICGRASS LBS. PER ACRE COVER CROP W Q OF SECALE CEREALE (CEREAL 7 Panicum virgatum SWITCHGRASS RYE) 3 Agrostis perennans AUTUMN BENTGRASS 2 Aronia melanocarpa BLACK CHOKEBERRY AREA 1 2 Vibumum lentago NANNYBERRY 4.2 LBS SEED MIX W/ LU Q 6.3 LBS SECALE CEREALE 2 Cornus amomum SILKY DOGWOOD 1 Senna hebecarpa WILD SENNA AREA 2 1 Eupatorium perfol/atum BONIEST 5.2 LBS SEED MIX W/ 1 Eupatorium fistulosum JOE PYE WEED 7.8 LBS SECALE CEREALE 1 Eupatorium coelestinum MISTFLOWER AREA 3 1 Vernonla noveboracensis NEW YORK IRONWEED 7.6 LBS SEED MIX W/ 1 Rudbeckia hirta BLACKEYED SUSAN 11.4 LBS SECALE CEREALE 1 Ceanothus americanus NEW JERSEY TEA 0.5 Helenium autumnale COMMON SNEEZEWEED 0.5 Asterlaevis SMOOTH BLUE ASTER W 0.5 Penstemon digitalis TALL WHITE BEARDTONGUE VJ 0.5 Apocynum cannabinum INDIANHEMP STREAM—BUFFER MITIGATION GENERAL PLANTING NOTES SITE PREPARATION SHOULD BEGIN IN THE FALL PRIOR TO THE TREE PLANTING AND SEEDING IF IT IS NECESSARY TO KILL OFF ANY INVASIVE UNDESIRED SPECIES WITH HERBICIDES. UNDESIRED SPECIES MAY INCLUDE MULTIFLORA ROSE, HONEYSUCKLE AND OTHER SPECIES DEEMED TO BE INVASIVE BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION. THE HERBICIDE SHOULD BE APPLIED BY A LICENSED SPRAY TECHNICIAN USING A NON-TOXIC, BIODEGRADABLE HERBICIDE TO CONTROL UNDESIRABLE VEGETATION. PRIOR TO TREE PLANTING AND SEEDING AT THE BEGINNING OF THE NEXT GROWING SEASON, THE GROUND SURFACE SHALL BE PREPARED AND ORDERED BY TILLING OR SCARIFYING TO A MINIMUM DEPTH OF 2". TEST SOIL PH; THE PH LEVEL WITHIN THE GENERALIZED ROOT ZONE OF STREAM BUFFER MITIGATION PLANTINGS SHOULD BE TESTED AND BROUGHT TO WITHIN A RANGE OF 6.0 TO 7.0. THE PH ADJUSTMENTS CAN BE MADE USING POWDERED LIME. ALL TREE SEEDLINGS SHALL BE BARE -ROOT, ONE YEAR OF AGE AND GROWN UNDER WET CULTIVATION CONDITION, WHERE PRACTICAL. PLANTING PATTERNS SHALL BE RANDOM AND MIXED FOR THE DIFFERENT TREE SPECIES WITH THE SPACING OF 5-7'. TREES SHALL BE PLANTED NO CLOSER THAN 5 FEET AND NO FURTHER THAN 100 FEET FROM THE TOP OF THE STREAM BANK ON BOTH SIDES OF THE CHANNEL. TREE SEEDLINGS SHOULD BE PLANTED AS SOON AS THE AMBIENT SOIL TEMPERATURE IS ABOVE 41' F THROUGH MAY. PLANTS SHALL REMAIN UPRIGHT DURING TRANSPORT/STORAGE. PLANTS STORED ONSITE MUST BE PLANTED WITHIN THREE DAYS OF DELIVERY. IN ADDITION, THE PLANTS SHOULD BE STORED IN A PROTECTED AREA UPON ARRIVAL IN ORDER TO SHADE THEM FROM EXPOSURE TO THE SUN AND DRYING WIND. PLANTS THAT CANNOT BE PLANTED IMMEDIATELY UPON DELIVERY SHALL BE KEPT WELL SHADED, PROTECTED, AND WATERED. ALL DAMAGED PLANTS SHALL BE REMOVED FROM STORAGE WHEREUPON THEY MAY BE USED AS MULCH UNLESS THEY ARE DISEASED. HOLES EXCAVATED FOR THE TREES SHALL BE 3 -TIMES THE CONTAINER DIAMETER OR AT LEAST 6" WIDER THAN THE BARE ROOT DIAMETER. THE HOLES MAY BE EXCAVATED EITHER BY HAND SHOVEL OR BY POWER AUGER. EXCESS SOIL GENERATED FROM THE EXCAVATIONS SHALL BE DISPOSED OF RANDOMLY OVER THE SITE. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE GROWN IN AND THE TRUNK SHOULD BE SITUATED NEARLY PLUMB. AVOID PLANTING SEEDLINGS IN EXTREMELY DRY, HOT OR WINDING CONDITIONS. HEAT AND WIND CAN QUICKLY DRY OUT LEAVES AND ROOTS. WATER THE SOIL AROUND THE SEEDLINGS IMMEDIATELY AFTER PLANTING. AREAS COMPACTED BY FOOT OR VEHICLE TRAFFIC SHALL BE TILLED OR AERATED PRIOR TO RESEEDING AREA AFTER TREES HAVE BEEN PLANTED. BROADCAST THE SUGGESTED SEED MIX BY HAND OR MACHINE EVENLY OVER THE PLANTING AREA AND COVER THE SEEDS WITH APPROXIMATELY 1/4 -INCH OF SOIL USING A DISK OR OTHER IMPLEMENT. AFTER SEEDS ARE COVERED, THE SOIL SHOULD BE LIGHTLY ROLLED TO ENSURE A GOOD SEED TO SOIL CONTACT FOLLOWED BY APPLICATION OF CHOPPED AND BLOWN WHEAT STRAW MULCH. NO STORAGE OF HERBICIDES OR OTHER AGRICULTURAL CHEMICALS SHALL BE PERMITTED NEAR THE PLANT STORAGE OR MITIGATION AREAS. TH 07 O AMMY MARIE GEORGE _Z U No. 0406001817 pE SCALE 1" = 50' 50 25 0 50 100 SCALE IN FEET a I EXISTING DI RSION PITCH/DIKE SEE OLD AIL BLOCK; 14 A / < hh STORMWATER NAGEMEI�T PLAN 1 ' DATED MAR //20 2013 \ \ l rO 1` \\ \\ \\ \\ \, ; F '.��..�.•♦.•. h h, hhhh � � /l � \, //%/',/ � llL_ ' a I r /' ' / .- -- .r /\ r / •\ `. �h ' ' /' / / 3 '`hh• �,.��'h •. � I I \\-------- ------------ -------------- 2 J/,/_.1 1 t r�J r' /' �' '�r 'h .__ --___ - .- _________-. - - ~� OP /' '`., '•h __ �— hhh Y �;'� u \� � tt e\ \�.._._-__.._._-. _. ,//, j1l �_`!' /r' r r . •''! h _.__--- -- " __ / `\ �\ `h `--------.- l ,, `-----------__' hh I 2 \ \•_^^ \\ \ � I i /!, '.�/ 1 I A i ^�\ \ I ! \� \ ` - - _.-- -.-.____----.-C_ _. =- ,''rr � /l .._ err rri fi/�- .•- .,, ._._____.-- _/�l- '\ ham.__ -- - '_ — — -- -' ..r'J \\ \ \ /1 `\� � j 1 ----------------------- S, --___ _-.------' S ! l i / \ \ .__ _...--�'-"' `-----"- / ^, � ,' rqy' r' r•' NITAi�y .EX. DRAINA E, i / .....-..�^" "`.....� , \, \\ '\ \\ _.._ — rr' /' •M1FV, ' r' '.' r r' 1QQS - _ ^�" -- \\ •hh •\ -_ _.._ .._.. ._- /,i /! I ! 1 ES T 1 �'111J! l l :; 11 • /''�\\ ! \ � i \\ � }�-' -` / r' / / /� /' /' � r _ -- \\ \\ \\ /' J I Retention Basin III Conversion r \ l\\C ! � \ T � � �1 11 '\ \•�h \ .� -i- '/ t/'/ ,JJ � r / 0' ^� i \\ � \ ', �/JI 1 1 1 NWSE = 645.40AREA ---------------------- N ------------- ---------------------------- ------------- \-_.--.______ --- '- l_N/l ^/ ^\\�. /' ! l / Oi � / , l �� � j" - ,___ � ._•_ � __-_._--_-'_'_--_ -_..__ __" _ _ ,' 'r 'r� i'/" AREA _ I �% yN gdd.. -.h �l - � / / \\ --------•-----._ _ ------ — — `' ----- � r RgMcy ' _ FEUArFl Of7DPLAIN 1 � 1 J 1 � , � '� • . - r _ 00 YEAR J l ! EI I �/' +• _ ;.%. 'yFfRiE11A i1.- ! ��:�.:"�/ 1 \ \ \ \ \ '' +i t' 'l -'' ._-- � '�' ./ -.cam .- \ J / "'•• \ � r' � / l' // Ir I' WPO IMPACTS /0.49 Acres (Outer 50 of WPO Buffer)34 rz REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 SCALE 1 " = 50' CONTOUR INTERVAL 2 Feet • U cv Oo wW ® Z Q CL Q Z Z Q V) Q Cc 0C cc LU Z 2 N C0 0 co a NQ OCC rcW E@) 0U wo cc w� VQ ow J N Q (� = C6 Z Urn 0 � N Qo �� 000 LU oto J LL tf) 0� 0c Zn CL LU 2T �o Q� Cw 0 W O a REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 SCALE 1 " = 50' CONTOUR INTERVAL 2 Feet FILE NUMBER 8053 it SHEET 12/14 cv g z ■ Yz J� Z W Q O z fQ— Z I.i C LU Q ' 3. O W LL J MJ W 00 J LL m J_ /O+ LL W Q z O Q po W O VJ cr F- 0 W FILE NUMBER 8053 it SHEET 12/14 DA UPPER BALLARD FILD LOT 32 UPPER BALLARD FIELD- > U16PER BALLARD FIELD/, j LOT 30 TMP 55E-1-32 lop" - V ----TMP 55E-1-30 GINSBERG, ROBER >;',� �,xx-,_ n_A" �,'.°,.:_..--'•,, -y�-ti«\-\ ' .�.. _',\<r\"-'/k1N'- � j W.F\\OllP• 1.R 0`,,-\. -2_ I'MP 55E- -11 T\E.lt --Htf5FMYER, GLENN A. OR REBECCA L. HEYMANN,,ERNEST L. 1000 O.RJULIE--L.- OR'LAURA A. N grog Q 0 400 \100, 1. 000 'rRIEAM s 2 PET& 1 10000 614 . ... ...... - ------ 678 PORTION OF, *0 TMP 55E- -',MARCH I R �, S/%'', i.` ' I, .,'\ fj1II iI 1 _ '' if{ ««r\te f ' 'I �',' y.�'f/- �I I ! 2�rJQ'�` . I\~ -''J' `� MOUNTAIN PRqP'ERTIES,, LLC ZONED: RA 0 USE 'OFbEN PACE 676 ------ AR UPPER BALLARD POND 10 00 1 1 N OF TMP 5-0•1 #' _ _5, "-. __ #E -._ ,- 1— •.- -f• 'H A !'I;COUN7yOF LBEMARLE, VIRGINIA• OLD,TRAILK ZONEDNDM PORTION OF P 55E -1-A1 MARCH TAIN PROPERTIES; LLC mou ZONED�RA SE - GOLF COURSE 00* Lo IN 676 674-- k 19. ;J MITIOAT -401 ARE BLOC 7- 0001-- 0000 --- ------- I I azm/l I W=1211 I cam I I OEM I cm= 'nomm mom 1 100, STMAM BUFFER am;3 m2m, I Emm V FUTURE BLOCK 35 684 ........ ------- PLANT SCHEDULE -- TREES (MITIGATION AREAS 4) QNTY. BOTANICAL NAME T —comMON NAME SIZE/ COMMENTS 24 A cer nibrum RED MAPLE 25 Betula nigra RIVER BIRCH 20 Liquidambarstyracfflua SWEETGUM 1 -YEAR OLD BARE -ROOT SEEDLINGS 30 Lihodendron tulipifera TULIP POPLAR 5-7' RANDOM SPACING 23 Nyssa sylvaiffca BLACKGUM 27 Platanus occidentalis AMERICAN SYCAMORE 16 Quercus phellos WILLOW OAK PLANT SCHEDULE -- SEEDING MIX % MIX I BOTANICAL NAME I COMMON NAME 22 Chasmanthium latffolium RIVER OATS 15 Sorghastrum nutans INDIANGRASS 15 Elymus vIrginIcus VIRGINIA WILDRYE 8 Panicum dgidulum REDTOP PANIGGRASS 8 Andropogon gerardil BIG BLUESTEM 7 Panicum anceps BEAKED PANICGRASS 7 Panicum vilyatum SWITCHGRASS_ 3 Agmsfis perennans AUTUMN BENTGRASS 2 Aronia melanocarpa BLACK CHOKEBERRY 2 Vibumum lentago NANNYBERRY 2 Comusamomum SILKY DOGWOOD I Senna hebecarpa WILD SENNA 1 Eupatodum peffoliatum BONEST 1 Eupatolium ffstulosum JOE PYE WEED 1 Eupatodum coelest(num MISTFLOWER 1 Vemonia noveboracensis NEW YORK IRONWEED I Rudbecda hirta BLACKEYED SUSAN 1 Ceanothus americanus NEW JERSEY TEA 0.5 Helenium autumnale COMMON SNEEZEWEED 0.5 Asterlaevis SMOOTH BLUE ASTER 0.5 Penstemon digitalis TALL WHITE BEARDTONGUE 0.5 Apocynum cannabinum INDIANHEMP 0 COMMENT 20 LBS. PER ACRE WITH A 30 LBS. PER ACRE COVER CROP OF SECALE CEREALE (CEREAL RYE) AREA 4 2.8 LBS SEED MIX W/ 4.2 LBS SECALE CEREALE FUTURE BLOCK 7 STREAM—BUFFER MITIGATION GENERAL PLANTING NOTES SITE PREPARATION SHOULD BEGIN IN THE FALL PRIOR TO THE TREE PLANTING AND SEEDING IF IT IS NECESSARY TO KILL OFF ANY INVASIVE UNDESIRED SPECIES WITH HERBICIDES. UNDESIRED SPECIES MAY INCLUDE MULTIFLORA ROSE, HONEYSUCKLE AND OTHER SPECIES DEEMED TO BE INVASIVE BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION. THE HERBICIDE SHOULD BE APPLIED BY A LICENSED SPRAY TECHNICIAN USING A NON-TOXIC, BIODEGRADABLE HERBICIDE TO CONTROL UNDESIRABLE VEGETATION. PRIOR TO TREE PLANTING AND SEEDING AT THE BEGINNING OF THE NEXT GROWING SEASON, THE GROUND SURFACE SHALL BE PREPARED AND ORDERED BY TILLING OR SCARIFYING TO A MINIMUM DEPTH OF 2". TEST SOIL PH; THE PH LEVEL WITHIN THE GENERALIZED ROOT ZONE OF STREAM BUFFER MITIGATION PLANTINGS SHOULD BE TESTED AND BROUGHT TO WITHIN A RANGE OF 6.0 TO 7.0. THE PH ADJUSTMENTS CAN BE MADE USING POWDERED LIME. ALL TREE SEEDLINGS SHALL BE BARE -ROOT, ONE YEAR OF AGE AND GROWN UNDER WET CULTIVATION CONDITION, WHERE PRACTICAL. PLANTING PATTERNS SHALL BE RANDOM AND MIXED FOR THE DIFFERENT TREE SPECIES WITH THE SPACING OF 5-7. TREES SHALL BE PLANTED NO CLOSER THAN 5 FEET AND NO FURTHER THAN 100 FEET FROM THE TOP OF THE STREAM BANK ON BOTH SIDES OF THE CHANNEL. TREE SEEDLINGS SHOULD BE PLANTED AS SOON AS THE AMBIENT SOIL TEMPERATURE IS ABOVE 41* F THROUGH MAY. PLANTS SHALL REMAIN UPRIGHT DURING TRANSPORT/STORAGE. PLANTS STORED ONSITE MUST BE PLANTED WITHIN THREE DAYS OF DELIVERY. IN ADDITION, THE PLANTS SHOULD BE STORED IN A PROTECTED AREA UPON ARRIVAL IN ORDER TO SHADE THEM FROM EXPOSURE TO THE SUN AND DRYING WIND. PLANTS THAT CANNOT BE PLANTED IMMEDIATELY UPON DELIVERY SHALL BE KEPT WELL SHADED, PROTECTED, AND WATERED. ALL DAMAGED PLANTS SHALL BE REMOVED FROM STORAGE WHEREUPON THEY MAY BE USED AS MULCH UNLESS THEY ARE DISEASED. HOLES EXCAVATED FOR THE TREES SHALL BE 3 -TIMES THE CONTAINER DIAMETER OR AT LEAST 6" WIDER THAN THE BARE ROOT DIAMETER. THE HOLES MAY BE EXCAVATED EITHER BY HAND SHOVEL OR BY POWER AUGER. EXCESS SOIL GENERATED FROM THE EXCAVATIONS SHALL BE DISPOSED OF RANDOMLY OVER THE SITE. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE GROWN IN AND THE TRUNK SHOULD BE SITUATED NEARLY PLUMB. AVOID PLANTING SEEDLINGS IN EXTREMELY DRY, HOT OR WINDING CONDITIONS. HEAT AND WIND CAN QUICKLY DRY OUT LEAVES AND ROOTS. WATER THE SOIL AROUND THE SEEDLINGS IMMEDIATELY AFTER PLANTING. AREAS COMPACTED BY FOOT OR VEHICLE TRAFFIC SHALL BE TILLED OR AERATED PRIOR TO RESEEDING AREA AFTER TREES HAVE BEEN PLANTED. BROADCAST THE SUGGESTED SEED MIX BY HAND OR MACHINE EVENLY OVER THE PLANTING AREA AND COVER THE SEEDS WITH APPROXIMATELY 1/4 -INCH OF SOIL USING A DISK OR OTHER IMPLEMENT. AFTER SEEDS ARE COVERED, THE SOIL SHOULD BE LIGHTLY ROLLED TO ENSURE A GOOD SEED TO SOIL CONTACT FOLLOWED BY APPLICATION OF CHOPPED AND BLOWN WHEAT STRAW MULCH. NO STORAGE OF HERBICIDES OR OTHER AGRICULTURAL CHEMICALS SHALL BE PERMITTED NEAR THE PLANT STORAGE OR MITIGATION AREAS. A Z STREAM BUFFER MITIGATION_ Wj 410: RESTORATION REQUIREMENTS STREAM BUFFER AREA DISTURBED = 21,500 SF (0.49 AC) MITIGA11ON AREA REQUIRED = 43,000 SF (0.99 AC) MITIGATION AREA PROVIDED = 43,026 SF (0.99 AC) MITIGA11ON AREA 1 = 8,968 SF (0.21 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 254 BARE ROOT SEEDLINGS (L MITIGA11ON AREA 2 = 11,526 SF (0.26 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 315 BARE ROOT SEEDLINGS MITIGATION AREA 3 = 16,607 SF (0.38 AC) 0 REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 460 BARE ROOT SEEDLINGS a, MITIGATION AREA 4 = 5925 SF (0.14 AC) 06 REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 165 BARE ROOOT SEEDLINGS z REVISIONS DATE I May 9, 2014 SCALE 50' CONTOUR INTERVAL 2 Feet C*4 5z z (L Z (L Lu 2 0 a 0 Z N cf) <� CL a, 50 Zo z(9 06 Q Og � a: ju a2 > 0 LL wz z cr. 0 0 .J co w C�8 co 6 Lu 0' u 2 d u' J z o cm 0 0LL •.jLu co LL Z 0 5 - w go k CO cc cc CL Lu 0) a cm F9 0 .j 00 co cr 0 z 0m z IL Lu REVISIONS DATE I May 9, 2014 SCALE 50' CONTOUR INTERVAL 2 Feet FILE NUMBER 8053 SHEET 12A/ 14 C*4 5z z (L Z (L Jw cow 2 z a 0 Z F— (L 0 z(9 06 Q z cr. 0 0 .J cl) LL Im 06 un J0 —j D J z o u 00 z w .j 00 co cr FILE NUMBER 8053 SHEET 12A/ 14 w U Wcq CONSTRUCTIOM OF A SILT FEArCE A�1D " D"' T TR+�:. I M&w C QUst�Tlaa. (3.391 - DUST CONTROL IMLL BE APPLIED IN AREAS SUBJECT TO � � � � 8 m STAVE CONSTRUCTION ENTRANCE3'1'RF' SUPPORT) T'Y ICAL WA TER WAY � SURFACE AND AIR MOVEMENT OF DUST VIVIERE ON-SITE AND O F -SITE DAMAGE � � h CROSS-SECTIONS THE PtJ1�POSE OF THIS PROJECT Is TO OONSTRUCT A SEDIMENT BASIN TO CAPi1Jlf� 1S LIKELY TD Q�IR IF PREVENTIVE MEASURES ARE NOT TAKEN. TEMPORARY 7w lay 1. $Er PWI AID � A 4W L sIAU 1 F 0 TO 111E PWM RUNDFF FROM THE DEVELOPMENT I'LTHIN Olt? TRAIL SU'9DIVISLON. A LONG DIVERSION SEEDING M).NjERL1ANENT SEODING (3.32} MULCHING r�3.35}, IRRlGATiCON, Q. � (9 pT THE LEE Cohi AM WL WILL CAPTURE RUNOFF FROM THE LARGEST AREA POSSIBLE AND DIRECT IT INTO THE TIL AGE,OR OTHER APPROVED PRACTICES MAY APPLIED 70 CONTR01 � OF P0s1s. SEDIMENT BASIN. THE SEDIMENT BASIN HAS BEEN DESIGNED TO UTILIZE TFE EXISrNG AiRBORNE DUST: Q >Y W O " �� o�lc °� � t� �� � , - �1 _ OUTFALL. AND TEMIRCIRARY (BSER, AND SHALL UNiT DISCHARGE RATES TD THOSE � � � � � u. SPECIFIED IN VA 10.1-561. APPROXILIATELY 9 ACRES ARE TD NE DISTURBED. Q Z ? I 1 liwil , - iSHUMM 'i rr! Yt Fill ��� • !- .. ,,,� � � __...�...t.�.`,'-� "':: s.. ,.. ( �-�. i..�i.;.r;� s 1 ..:is"-�--�s �. ..-_ E� _j imam CLIRIFI d' UN. A € I f 1- I ' _ �,. _ - i I; _ ;'I - _ ; it � _- - i === ��1 -= ' Y' _ ! � jp�G SSE _ S � Q � cin � 401 _: i _ ,a IPP==-_'!; ;-. ; #; -- - , , CONSiRUGTION tLL SEQUENCED 54 THAT OPERA110NS CAN BEGIN InO ;i;== ILII i } , i, �. ai �1►i=�#E I � .i� _' I �- I ,i v .'Ifs -il: CURR�ITLY Tti>_ DISTURBED AREA IS OPEN AND GRASS COVERED. THE DIVERSION, AND � � W SIDE ELEVATION 1 lou. r Lm M= EAIJiM SEDIMENT BASIN WILL RECEIVE RUNIOFF FROiJ BLOCKS 11. AND 14 IIiHICIi AND END AS QUICKLY AS POSE Q U Q TIMM VES ARE IN VARIOUS STAGES OF CONSTRUCTION. TWO SED%.1E dT BASINS HAVE OEM p� O a PROPOSED WITHIN THE DISTURBED AREA. SBP AND SBJ2 RESPECTIVELY. S811 ,II�PO 2• SEDIMENT TRAPPING MEASURES WILL BE INSTALLED AS THE FIRST STEP IN � �. �. / � �,,,,�`�� -=�11�i' �,%"""�►- ..,. �` • � .� ��,1 T } GRADING AA+iE}} iEILL BE SEEDED AND MIJLICHED il�lalEDIA1ELY FDLLOYT"!G �rTT�� � a -- ' ..�" z 2011-0013 IS TO BE ENLARGED TO ALLOW DEVELOPMENT OF SECTIONS 12, 15. AND INSTALLATION. w a �` k Lq PORTIONS OF THE REMAINING SITE. WAS PLANNED IN CONJUNCTION V.M BLOCK D Q w -:1- U m vrac sr _ __,/' !?y_. .�' 14, AND CAN BE REMOVED AFTER THE ENLARGEMENT OF HAS BEEN COMPLETED. ' D �3. TEMPORARY SEEDING OR OTHER STAE RJZA71ON 11911. FOLLOW IMMEDIATELY AFTER rj N ,: ; :�1=. r¢ ' _! 1j� :;'; - l Is ����/ (�yy�/�� GRADINQ {W' ,`�A V l�tlf..SSi�S! 4/PASS-.lf"J►/lMi qj gr • A §rti:` " ylmml FIAT ; Iii fr `' ° ' =`�{' -I-- �' QID TRAIL DRIVE FORMS THE WESTERN BORDER, TRIBUTARIES OF THE LICKINGHOLE 4, THE JOB SUPERINTENDENT SHALL BE REMS93LE FOR THE INSTALLATION AND � � � � " �' CRI EK LIE TO THE SOUTH AND FAST BLOCKS 11 AND 14 OF OLD TRAIL SUBDIVISION MAINTENANCE OF ALL EROSION AND SEDIMENT CONTTiOL PRACTICES. O }FTS :z> :3•-.r .w-w.a' • 4 --:"t -a,..;,:,w,x. LIE UPLAND TO THE NORTH. AN AREA TO THE EAST OF BLOCK 14 HAS BEEN IECENTLY GRAM, AND WAS ONCE FORMER PASTURE SCRUB FORST LIES 5. Vfi HIN 30 DAYS AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CMTROL U' U to N 3. ATrAM TME T=3 FJI W m TIE WRE 4. Bit. MO COUP= 1HE - - u .:: cn _� ' GENERALLY TO THE SOUTH AND EAST THE SEDIMENT BASIN. ADMINESTRATOR THE TEMPORARY EROaItIEi AHD tDNTROIS ROLL BE v�or V �' rmmrc � t°' xM >� mr 1M TME - CLEANED IJP AND RE110V1DD. AND ANY SEDIMENT BASINS WILL BE CLEANED OUT � g C} SE SITE 10 SEED c ` = a _ 0�► 4 X I Ali � s - M ' :W I, _'fa - - A41D CONVERTED TO PERtIANENT STORIAIlIAIER 1d1ANAGET ENT BA;1NS (j� flC � Z �f .iii, ''.I..: ..:v r 4` t �• � ,, ;� ..• 't� i, i I �!il d$-'.._-�� ::: - S i c:.Y _ _ ^-,'i i; - __ - , ��...._- ___I ' f±:=^: u -; ;R s �.: - ! -;; I;i:_.:._ i ' ry = _:, i= - ; ='E� ' - moi' NO tXIiVSTRUCTION OUTSIDE Tim LIMITS OF Cf.EAIBNG AND GRADING 5Ft0�*+I 15 Q. W III ,.I,..Il III i:=3:, ,,Tit 11, _ (I W . ., .�' z➢..'>�},.`,':,. �. _?,yk .rCk,`?%t . } I. ) .._.......4:,E k L='-- t i}p- _; i i;i. -i 1!I }, .3:,i i -'1 1..__-.li QUM=PLAN VIEW x . ::: ' . ': ` Flub Cwm wc-: /ii.Ti�Idm mm cuml Is •- "•� OF W= AM EMIM REQUIRED. ANY SURPLUS OR SHORTAGE SHALL � BROUGHT TO OR OBTAINED FROM A '�TA�ILIOflN- �y����� 517E 1MTH APPROVED FSS MEASURES IN PLACE Q Wid�•.i.IR{ FiTEm3 ,# F1LTlR CL�IMI. ( per, NfflM=DWM SM or �5ro. t ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED 1[!TH PERMANENT LI � SEEDING IMMEDIATELY FOILONNG FINISH GRADING, SEEDING SHALL BE DONE VATH Z p T -2X TO KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32. W = _ - .I""'"'.e. ? - + .7 j C ,� rti ' ::?,t •_ ,` . , t ,_'t < z' ..+ :. s, . ,. a;:: t:: 11': i 11PIt' L C011i.`�if.7E CM#� 'di PERMAhiENT SL3rDING, OF THE VfRGiNiA E�RiLStOH AND SEDIMENT COlNTiZOL HANDBOOK.CL :, x-'� �..'�'•�`•q����'� �... iq � '- � • : - SIL Is OSP, MODERATELY COPING AND SELL -DRAINED, AND Is IN HYDROLOGIC ,tE;i.:: i�.:- �. ;'° .t r •; : r: ,,� s, aoan AANY FERTIIZIDi AND Uf►E APPLICATIONS SHALL BE IN ACCORtOANCE WITH SOIL TBT ,rte , I► f �••� ": II GROUP B. RESIN M ALL SEEDED AREAS ViLL BE STRAW M4JI�p'1€D TO PROTECT AGAINST TILT. >-' -�� ILIiY AND WATER CAPACITY ARE MODERATE Fa TGR .. it;�= _� =; ;ITS- EROSION AND TO PRESERVE 'SOIL MOISTURE THAT "ILL ENHANCE SEED GERMINATION. SE��-�}N - ,r.- �Qtl' ,., ,i SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. CRIMPDNG, PUNCH RIXi�R-TYPE ROLLERS, OR TRACK WALKING MAY 8E USED li3 I' 2 -' y ,r • aas" INCORPORATE MAW MULCH INTO THE SOIL ON SLOPES iF STRAW IS TO BE USED. REVISIONS • iiw' -^-."I IIT � :�`° j�;�,�., n,.•:s,a;L6:t' tS awry `„'��:X 'dgs'S ;"q. y,J��/q�/{ .. .•e. A . �:... .._...._ u?yk6 i31PE {�.hY LQ TO ?�,, EL'I� MM m SOLE A SOIL IS DEEP, STEEPLY SLOPING, EMIL DRAINED, AND IS IN HYDROLWC GROUP B. .. ,,'. ;..' :: •. ,..I4 -},.4-1s oo �' JUNE 11 2!013 OF FSC Akos MPS IMf1+#t TMIE TREtiCI'L '� ` ;� • • j TIM As roars LOCATED ON CONVEX SIDE SLOPES ( ALLUVIAL FAME. . .. j�'. IBM WW FMC JULY 17, 2013 . a , .; .�Q3 -� IIA a.A'i LOAM. 5 T�1 ELY CALCULATIONS OF RUNOFF BEF)DRE AND AFTER DEVELOPMT INDICATE THAT THERE F � ` � AS � VALL BE A NET INS iN PEAK RUNOFF AS A RESULT OF THE INCREASE IN THE SOIL IS DEEP. STEEPLY SLO131% M•'ELL DRAINED. AND IS IN HYDROLOGIC GROUP B- IMPERVIOUS SURFACES FOR THE DEIdEIOPMI=NL TH , A ATER a�n1 }.t _ :'< "Y HOtI' LOCATED ON 5fE}E SLOPES OF SMALL ORALNAGEWAYS MANAGEMENT BASINS HAVE IBID:N DESIGNED TO DETAIN AND RELEASE THE RUNOFF AT +.a '. `2. �i ' p17 ' w'� %. N,a:i '"• '� As7.`'! '+y K,. , �. i,'4 `, • 5"�. R111THE RATES SPECIFIED IN VA 10.1-591• REFER TO THE SITE PLAN FDIC PERMANENT SECTION B -B � . - �1 A -A BASIN LOCATION, CALCULATIONS, AND DESIGN DETAILS. 3=1 Mu i�l i� m Ed 1 _Ik . of f f i.0 H SIOU imam r# • jam 8MIn fm �t QdmL Fm U5_1 SOURCE- VA. DM PLATE 3.17-t � � � � ' � �' Pa�Tea'eanstriictian entrancefar erasion cont I lens NO CRITICAL EROSION AREAS EXIST ON THE SIZE. PART.CUL.AR CARE SHALL. BE TAKEN iN {GENERAL, ALL EROSION AND SEDIMENT tOOIMOL MEASURES WLL BE CHECKED P ON THE CUT SLOPES AND DITCHES TO ENSURE ADEQUATE VEGETATION l5 TYPICAL CAL l R A l 1 I RO�i,[1 CHECK DA ESTABUSHED AS QUICKLY AS POSSIBLE TA KN E EROSION.. DAILY AND AFTER EACH SIGNIFICANT RAINFALL, Tt� FOLLOfP,'NG TiEF�S 1I9Li. � t�iECKED N PART}G`ULAF� ,�T�N:v nY m,�� �� _ �+ t� T rp �r q,�• �r rp� •SE�I"��1T CtiNiR � ACCESS (SOIL STAB'ILIZA �'1'i�.(1P BLANKET) KG .l '� �. .�. 1. THE CONSTRUCTION ENTRANCE SHALL BE CHEK�KED DAILY FOR SOL BUILDUP. IF AC�E�S T�--�T^T.. 3' S�-�A ASf?F�iT TOP r BECOMES OGGED TO PAVEMENT .L11's.7 TALLrtl TION CRITERIA RIA 2 ACRES OR LESS CF DRAINAGE AREA-' UNLESS OMMSE INDICATED. ALL. VEGL"fiAMVE AME) S=CTURAL EROSION AND RANSPPOORTTA ON .OF DONT ROAD AY ADDIIMONALL STONE, P_. SEDIMENT CONTROL PRACTICES SHALL BE C014STRUCTED AND MAINTAINED ACCORDING _ _ JILL..:. •� DATE : OF STME OR A WASH -RACK MAY BE REQUIRED. TO IENAIUM STANDARDS AND SPECTFlCAT10N5 OF THE VIRGINIA EROSION AND A' SEDIMENT CONTROL HANDBOOK. LATEST EDITION. THE MNIMUM STANDARDS OF THE MARCH 20 2013 ' .�n m�: �m�;',��r:=��x�;�:-� ;� � � A truer 1• . 2 SILT F1�NC1r. SHALL. � INS�TID IMMEDIATELY AFTER EACH RAINFALL AND AT �„ VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS SHALL BE ADHERED TO LEAST DALLY DURING PRMO M RAINFALL K -05E ATTENTION SHALL BE PAID TO y� y_ THE REPAIR OF DAMAGED SILT FENCE RSULTING FROM END RUMS AND _ msEmt t� f�l.�tfd6�. . ,., � ,: � :� � 1 UNLESS' OTHERWISE WAIVED KIR APPROVED BY A YlU3iANC:. MAWS. �1 a FILTER t�,:iQTH �� ' * � �� I �EFFECTIVENPRIOIItG. DTHE END OFTHE CTHE EXPECTED SABLE LI D THON A OLT FENCE DECOMPOSE OR E SCS CHM t 70 19 Btu TO t2 { BARRIER STILL BE NECESSARY. THE FABRIC SHALL BE REPLACED PROMPTLY• E.Qs+is-riav�;t'Iv�a *Pt'atx:..T Psati� _ s.; : •� 72! VAX. 4s'm OR i1A71ER �• taw t _ 1, ] .P �4� ILS ENTRlII�t� A ARY CONSTRUCTI ONE SEDIMENT DEPASf M SHOULD BE REMOVED AFTER EACH STDR U EVENT. THEY MUST ENTRANCE SHALL BE INSTALLED 1�ERE THE ACCESS ROAD INTERSECTS MATH BE REMOVED 111!f N DEPOSITS REACH APPROMMATELY ONE-HALF THE HEIGHT OF " rusm n mgr (- DOWNSTREAM VIEW) ' THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT SM ��'���-� _ � 7tt ee til�Jttl.Y J�itiimED + t 1 lilt i 1 t 1 m KXJIREiuIONT LANE.. x YDGf �11 FEiNCE IS NO LONGER REQUIRED SHALL 8E TO 1r171Tti THE (p7gaMML FMB er EtymE3Mi 1�L 11 m � AGGRMWE 2 - ACOESS ROADS, PARKING AREAS, EXISTING GRAC& PREPARED. AND CONTOUR INTERVAL _ err, t 1 1 AND OTHER ON-SITE VEHICLE TRANSPORTATION ROUTS SHALL BE STABILIZED 3, DIVERSfON DIKES SHALL BE INSPECTED AFTER EERY STORM�i AND REPAIRS MADE ,` ' mow. w MTN STONE IMMEDIATELY AFTER GRADING. � �,, � 1 � _,. '� --�,� h •?�...'E'�► � 1 TO THE DL+�E, FLOW Ct{AIVNL�:, UUTi.ET, OR SEDIMENT TRAPPING FACILITY AS 5�,,4G �. NECESSARY ONCE EVERY M WEEKS. WHETHER A STORM EVENT HAS OCCURRED c� }`'�tY'''`" T�'rv� 1 OR m 1-'" 3. - SLT FENCE BARRIERS YELL BE INSTALLED OR NOT. THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED 3• k t. 81EM 'TOWN Oat i 1 r . Y DOWNSLIDE OF AREAS VATH MINIMAL GRADE$ TO FILTER RUNOFF FROM SHEET 1 1 FLOW AS INDICATED ON 1F>E ATTACHED SLATE PLAN, REPAIRED BEFORE THE EN OF EACH WORKING DADAMAGES CAUSED BY COIMTRUCTION TRAFFIC OR Y. ACTIVITY MUST 13E � /jam "0v" L4 }15]IY. `•`F. ."Y:�1Y3: IJIiliiflhS9L.,, 1:'v+13 i:'. 1. k:.ter:�': ��✓I 1 i-10 ACMES OF DRAINAGE AREA. 4. TEIAPORARY DIVER51�,• DSS i(3.Q91 - A SYSTEM OF DIVERSION DIKES 70 4. SEDIMENT BONS 5H BE CHECKED �..Y TO, ENSU THE T . SEDNE�ir -'!S 1 m DIRECT FLOW INTO THE SEDIMENT BASIN ELL tE INSTALLED AS SHOWN ON THE � A4,,M_ DEV., ' t t 1 PIAN. EMBANKMENTS ARE STRUCTURALLY SOUND AND HAVE NOT BEEN DAMAGED BY -- ~ EROSION OR CONSTRUCTION EQUIPMENT. w - w THE EI�LERCIENCY SPILLWAYS SHALL BE f - f CHECKED REGULARLY 70 ENSURE THAT THEIR LIMNING IS WELL ESTABLISHED ANMD � J ' �__M _^__ 5. TEMPORARY MIRENT BASINS (3.14' -- A TEMPORARY SEMIMENT BASIN IS Tn BE EROSfON RESISTANT THE BASIN SHOULD BE CHECKED AFTER EACH �- � "`r� i '''i --�� �--1' T° �' 1 t 1• CONSTRUCTED WHEW THE STORMiVATER MANAGEMENT BASH #1 IS TO BE RUNOFF -PRODUCING RAINFALL. EVENT FOR SEDIMENT CLEANOUT: WHEN THE � tSCTQN A --a T a�ac �rr - y , LOCATED. SPECIFIC D�IEN IS OF THE EMBANKM IOM AND SPILLWAY ARE �"; C�3 cc r via. e � - ; : r�. k SEDIMENT REACHES THE CLEANOUT Li'1iEi.. IT SHAT. BE REMOM AND PROPERLY Aiiiiui�uir,nesaier_ta i.of i uichlumf 66.mistalled varich:aiinbib un Iubich b0cock �' '_ r ._ F�_.,i:_� x' w: 3 1 SHOWN ON THE DETAIL SHEET. ACTUAL LOCATIONS AND DIMENSIONS OF THE DISPOSED OF. (� Z 1 ted Ir r To r PLAN VIEW �� ��. �' � � '' � EMBANKMENTS AND SPILLWAYS ARE SHOWN ON THE SITE PLAN. CJI! MLATIONS � lnitaff, va -e supp.ing a wasli bare �vtkh"ac:�tiaiiieter ii#' . diel�es fir' adegt a '. ;; , :,' , A -; ; :: - = (c ncrt�+u.� "' '�'��, ;'`�" FOR THE SEONLIENT BASIN ARE SHDWL >r�TH THE DiETAIL. 5. STOIB,IIVATER CONiEYANCE CHJWNEL g ei�nstnut sre stu'e. =asii �ter'urust Ge'camed aura v vont tf�e ewrawe to air r y. STI�+IPL�NC7 ®il��aRAI� j al?tarc�recl settlui� area fa remove secGirie�it:. � seclime�rt;shall begreveirted fi•carr „ .5.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT. GRASS LRD "� � tnttriti�: tcxnn drains, dtche n,r-v4sterc ius s.. i t Iooelt s^ wwm� CHMK SUBS Ar MOL (DOWNSTREAM VIEW] 6. - A SERIES OF CHAIL`�iELS SHALL BECHANNELS A; U. LM Mt FM � Wr .0 W�IMI A1::1. CONSTRUCTED TO PROVIDE FIX'# THE CONVEYANCE +OF CONCENTRATED RUNOFF TO ARISHOULD G SS HAS IMMEDIATELY AND AN IF L!J A RECEIVING CHANNEL WITHOUT DAMAGE FROM ERKD5ION. 'TYPICAL DITCH SECTIONS N`CESSARY. AFTER GRASS HAS ESTABLISHED THE CHANNEL SHOULD m o srA�la tll� tr. � tar�rx spm..-c�aum�t�►no�a� � �- > PAVED, WJ�SH RACK VDOT #i BE 03IMKED PERIODICALLY TKO DETERMINE W THE GRASS IS MTHSTMMG W a . CALCULATIONS ARE S't! ON THE PLAN. W tic. 8��� t�OAEI.SI: AIIGREGATE FLOW VELOCt'L1ES1�".THIOUT DAMAGE li' THE CHANNEL IS TO BE M01WD IT . �� ., 1 _ TiM�a�► ,.�._ Y SHOULD BE DONE IN A MANNER THAT IT WLL NOT DAMAGE THE GRASS. I- -t 7FLOW. M DAM fS?03 - SEVERAL ROCK CHECK DAMS WILL BE INSTALLED UPSWPE &Z RiPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED 5 � � '� p " :-.'� r 1 OF THE SEDIMENT BASINS TO REDUCE THE VELOCITY OF CONCENTRATED FLM PERIODICALLY TO ENSURE THE SCOUR IS NOT OC IDURRING BENEATH FABI C O -- W U 2• - a WHICH WILL HELP INCREASE THE EFFECTIVENESS OF THE SEDIMENT BASINS. UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE J M- Q ____-- C HEC KED TO DETERMINE THE STONES ARE NOT DISLODGED BY L1U� FLOWS. � x.: '�: •`TED! 1r p s �' ' ;' - y '' 3 ' -M.. s •,� '' 5.3. IF SEDIMENT S D '> oc �t �T �F /� I ,:��t ;,,,�.;;;_.�:;�.-$ -JILL_ Ti tFOSITED IN A R JCi R1 Y I� V R I ,-' =� ' �'' = n" PROMPTLY PREt�ENT GRASS -LINED CHANNEL, IT ai-iOUID t p W ¢ ,r?- .:, =;;figg:.`_ REMOVED TO DAMAGE TO THE GRASS. SEDIMENT -j /� �r Ai},.•...:a . Y! _ Y'l! T : CLAaM I RIPRAP DEPOSITED IN A R IPRAP CHANNEL. SHOULD BE REMOVED WiEN iT REDUCES W BAFFLE RRLR L t'3 t� ,1 TION IN ' I. -- ALL AREAS 1MTH IT GRADE S TO AI THAN AS THE CAPACITY OF THE CHANNEL. J .f� Lf li1Y SHALL STAIR -STEP GRAM OR GROOVED �PLATIE 3,2S -4j TO l�,fD IN GRASS 2E 9 d Z ¢ SEDIMENT ENT BA SINS � STOUR CE: VDOT MQ ILS �t� PLAN 3.35-2 SOURCE. VA. DSWIC PLATE. 3.20-1 ESTABLISHMENT, INCREASE INFILTRATION, AND 70 SLOW RUNOFF VE .00ITIM B. (HECK DAMS SHALL BE CHECKED FOR SEDiMENT ACCUMULATION AFTER EVERY I •� � Q +C+� RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT 2 G Imo; ) -- TOPSOIL WILL. BE STRIPPED FROM AREAS 1�D REACHES ONE-HALF � THE ORIGINAL HEIGHT OF THE M�..A5tIRE. REGULAR ® z Z BE GRADED AND STOCKPILED FOR LATER USE STKICKPILES ARE TD BE ..J O D/2 I)02 Em SUGGESTED T NO SPACING BETWEEN CH CK DAMS STAWZED 19TH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED INSPECTIONS SHALL O MADE U ID BY TECH FLOWS A OF TECH ED IS L01�;TH c t � - FERilIfflt: 10-2D-10 1.000 LBS ATE ALONG THE LOWER PE RIk ETER TCO PROTECT DOWNSTREAM AREAS. THAN THE EDGES. EROSION CAUSED BY HIGH FI.KOWS AROUND TT E EDGES OF THE � � f DAM SHOULD BE CC1iRECTED IMMEDIATELY, iffiIId 3, M!EWARY SANG L1311 - AFMAS NOT BROUGHT M FINAL MADE FORA 7. ,� �DLD AREAS 1WLL BE CHECKED REGULARLY TO ENSURE THAT A GOOD V) . SE MWEIER-iFEBRUARY 15: 5Dm ANNUAL RYE C 50% WRNIER RYE 100 LEIS/ACRE L TT�E DISTANCE SUCH THAT POINTS PEFM OF MORE THAN 30 DAYS SHALL BE STABILIIZED WITH A TEMPORARY SEED � FEBRUARY 16 -AML 3D: ANNUAL RYE IDD LBS ACRE STAND IS MAINTAINED. AREAS SHOULD BE FERTIUZEU AND QED AS O !a j f A AND B ARE SOF EQUAL ELEVATION MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRMPING, PUNCH ROLLER -TYPE NEEDED. Ii W L - 7m� a� Fa i MAY -AUGUST: ROMAN MILLET 50 LBS/ACRE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH LTJ 1°0°x- ram TAqoulv ETE PORT C 1► f INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. $, THE STORMW'ATER DETENTION FACiUTY SHOULD iE CHECKED REGULARLY BY THE Tm 1 TO OTHER OF11ONS EXIST, SEE DIA EROSION AND SEDIM94T COI;NTROL HANDBOOK.OWNER M 7� T R, 4. �iULLDi 3,351 - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL. BE DAMAGED BY�ERt�dNSURE �THE T IT IS STRUCTURALLYBMMCY SPILLV�A�YIM:DiAI.L BE �IEGKi73SUMIED D AND HAS NOT � EI T `i MM :.f;;+;=--= ,t•r 'r APPLIED TOODDISNRBED SURFACES 70 PREVENT EROD510N AND REDUCE OVERLAND REGULARLY TKO ENSURE THAT ITS LINNG IS WELL ESTABLISTiED AND LIMON L B. FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING RESISTANT. GRASS SHALL BE KEPT MOYk'd BELOW A HEIGHT OF 15 AND THE it. OWS OF V x S x t/!." WE: 2 TONS/ACRE OPERATIOFISI, OTHER PLANTER MATERIALS WHICH D® MOT PROVIDE ADEQUATE 50LL r FILE NLJMI3E1� FMOM OR wt a �mmr PROTECTION BY THEMSELVES„ AND BARE AREAS YF ICH CANNOT BE SEEDED DOE OUTLET SI iOULD BE CHECKED Fi#t w am C=1 MOMI fER1TLL?ER: 14-2O-10 1, LBS/ACRE_•,;,; �_ �r i?c _�:_, , TO THE SEASON BUT THICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH ROLLER -TYPE ROIERS, OR TRACK WALKING MAY BE USED TO L�Ti "S 8053 MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS'/ACRE, ANNUAL RYE 2D LBS/Aim - _ :-, INIXWORATE STRAW MULCH INTO THE SOIL ON SLOPS iF STRAW IS To LE OR s flou �. iI~r xr'um- r I MAY 16 -AUGUST 15: KDMTIICKY 31 I ESCUE 200 LBS/ACRE, FOXTAIL MILLET 20 LBS ACRE USED. PLEASE REFER TO THE DETAILS AND CALCULATIONS FOR THE PERFORMANCE OF THE LM ' "" i AUWST 16-OC70SER: KENTUCKY 31 FIMM 200 LBS/ACRE„ AX14UAL RYE 20 LBS/ACRE DITCHES. AND SEDIMENT BASH. W NOVEMBER-FEBRUARY: KENTUCKY 31 FESME 20D L.BS/A€ RF, WINTER RYE 20 LBS/ACRE 5. EROSI�t+Ii MM �NKETS t3.3B1 - EROSION CONTROL BLANKETS WILL BE ------ INSTALLED ON FILL SLOI�E.S "TH A SLOPE GREATER THAN 21 FOLLOr,.NG FINAL SOURM6 USDA -SOS PLA7L &14-5 SOURCE: VA. D5Y'C ATE- 3.20"2 GRADING AND SEEDING. EROSION CONTROL BLANKETS 1F.1LL. ALSO BE INSTALLED iN DITCHES "4ERE POTENTIAL EROSIVE VELOCITIES MAY EXIST AS DETERMINED BY SHEET ENGINEERING CALCULATIONS. THIS W"LL PROTECT FROM RILL AND GULLY ERMON. ©ARGAITMPROJ\OLD TRAIL-84531BLOCK 141ESC-SWM PLANIESC-SWM PLAN 6-11-13.pro 3 OF 7 EXISTING PROPOSED 1438 1440 jj CONTOURS 18"- STORM SEWER ••••--••- CURB AND GUTTER ------- g„ CG -6R CG -6 CG -2 $� SANITARY SEWER ---- ,,,,�- WATER SERVICE METER UNDERGROUND ELECTRIC san UNDERGROUND TELEPHONE OVERREAD ELECTRIC FENCES PROPOSED GRASS MAINTENANCE ACCESS 1OX MAXIMUM SLOPE - - _6`z'2 rn 1 � -5 cn .. 1 / V j1 It I e � r N f/ r f 1 cc Zo l r / / ! Ci 'r \} �,--` j/- l� �` ♦\` `" ffr �Jj °�Ir �� �/ � �/ fr j. 154 J f j f r _ .r — ✓ r -JI /� f l ` r.. y � ..— — — ._._ ._. -..n .-- ^" `•. r r � r � � i � / r r r f --_ -✓- -' - 678 ---- --- +00 R�O - ` rf/ �Ir If �fl r fllf y ✓ y✓✓ E l 1OSEO ' ST�_M �t�_ -- -"- ..----— �'---r", 11� 6-74 FIC ( if � ,,. -- - 8 74 - ' -- •-' _` ~- -.._ ..' -" � o,'_�._ __ _ � y � / � f / LEI/l it r! Ij 674 C EXISTJNG .-- / / / / / / / .� f l t J f ! SANITARY " "- // / // / y} I l r I 1X.UH-4 SEINER - ��,"7 ...� - �,,..�•.- - / TG =671.31 y r r f t (�©�+ �~ .r.++. �! + �• fry — - — — — — _ tti/ f / / f % I f (� t 11=665.41 10=665.31 - - - - - - - 666, .Q� .,...."'..- - - _. -. - - _ ..... i 70 "r -' .- ------.-664 J f _- ------ _ - _ f __ 662 C �""". �.�.'frr —i'f✓J r' '-� �. -._..-rf .r'r f✓r MSL J1 66Q =671 03 - _ ✓ - - ,,^ . -- '' ' =663 663.f4 - - � - - . ' --' f -- f' - _ - - - _ ' ,- r r - b"58 _ � .\ - ti _ _ � /► f/ f /f ! } ( Ji .- t.--`' .�— - f - r .� - _ �' - rf ' 65604 654 rgoO 652 blb -70 --- ---58-- --- /-' 100 rf /150/ ?Silt (1 Y COUNTY -OF ALREMARLE \,Wk?Gl15iFA �+ - ,, B�3g5�`p'r=40 �', \ �\ GRADING PLAN ."'^... �• .-- .•'' "" ' / / r / f / r'' .-- --- / ... -- - y ` ' ^•- ` � � •.' •^. � . `. \. -. � . \` ~`" "'+ � `` \ \ \ .- .._. _ — — 1 rr=50' . r � I U+UU U+dU 1+UU 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50 14+00 14+50 15+0 DITCH PROFILE STATIONING BASED ON DITCH CENTERLINE 1"=50'H 10-10'V QARt7A1TMPR0.l\0LD TRAIL 8053\13LOCK 1AESC-SWM PLAMESC-SWM PLAN 6-11-13.pm a 0 N :cte) � �Nm a N CV Q r-� C Q� Z° q rcW a au wZ c/) aZ N Z� W Z N rc04 1 0 ('1 O � u. J r j 2 W coo o> W cc cc °� w W = �./ O. REVISIONS .LUNE 11, 2013 JULY 17, 2013 DATE MARCH 20, 2013 r� SCALE 1"=59HORZ 1 ° = 10' VERT CONTOUR INTERVAL 2 FOOT z z CL Lu r� JW Q LL OQZ0 a Lu D o z U Ju�j J t� � a"' cl zNOUN .jZO 4c) 00 00 cc° � W Lu FILE NUMBER 5053 SHEET 4OF7 690 680 4'; 2' AIDE BERM ABOVE DITCH BOTTOMI ----- -"" 670 'WIDE BERM -- ---"" �- XISTING GRADE ROPOSED DITCH CE TERUN IQ 670 4; WIDE BERM 3 ABOVE DITCH BOTTOM7-/ OP=66+4.0 / �,' , 4.V 660 4' 2' WIDE BERM ABOVE DITCH BOTTOM _ '_'-" --- -..--" ,.�--' ' _ -- _-- D-663.86 EXIST. SANITARY 660 --- --- -- 650 -'"� �" p J FOREBAY SEE 0€TAILI ENTRY EXIST. WATERLINE I I I I /- XISTIN ROPO GRA ED Df �CH E CE TERUN 650 �a 0. 64a�D 0 06 O t0 cD u N t7 4 iLl cD o .- Ki P`- to n to cD co c4 to wi (6 to cs� Coi O r) tQ V., ca cD N - til 4 LO s0 D u7 tQ ri to tD h rx) td t{ ca cD o p a� t!] w c9 u� t+f r• rz cd m to o to d r` to t0 �n i� N (-1 c0 Op C n w n t0 cO to N � 00 � tO 0 Li 0� 00 'fi to tq to r. ca 00 "t 40 0 O t}l to to tD 0 u) to co 0 tJ tr t0 0 u7 tsi w N iD to o O rn Gl N to c0 u7 N 0) N w c�0 0 to p of vi t0 Lo 0 I� tD 0i N co o 4 '� o N 0 t0 to N N O N w c0 O t7 N w cow W P � ray 0 Q0 O t� �- O w c0 to c+i d � r 0 c0 th C� �-- N 0 cto � 0 r7 +- N ttl c0 o o rn N N u7 cD to N � N N tD 0 o 0 - N N to t0 un No o N N til cD G1 8 N M NMS 0 o tt) N c� N w tD O 0 -- f i � 0 cab to F: r\ M) r�i w cow © o - .rF �t cD � N n '� d w c0 0 10 r et eh iD tO to N in � N� ,� to (.0 o o (D d tto (D � N co ih RC3 to C-0 o 90 +v] !n tD t0 � LO N cc 6 46 va � o o (0 tD 6 tD c0 Lf) cV c� til 6 � cD o to r7 tD CD tG CO Lo h N 6 6 tD i0 0 Q co Ph 6 tiD � � cV r7 !`� 1� !LT cC o td� o ti SD � c0 � h (0 � � tD c0 to o n � pi tD c0 � N tJD u/ 64a U+UU U+dU 1+UU 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50 14+00 14+50 15+0 DITCH PROFILE STATIONING BASED ON DITCH CENTERLINE 1"=50'H 10-10'V QARt7A1TMPR0.l\0LD TRAIL 8053\13LOCK 1AESC-SWM PLAMESC-SWM PLAN 6-11-13.pm a 0 N :cte) � �Nm a N CV Q r-� C Q� Z° q rcW a au wZ c/) aZ N Z� W Z N rc04 1 0 ('1 O � u. J r j 2 W coo o> W cc cc °� w W = �./ O. REVISIONS .LUNE 11, 2013 JULY 17, 2013 DATE MARCH 20, 2013 r� SCALE 1"=59HORZ 1 ° = 10' VERT CONTOUR INTERVAL 2 FOOT z z CL Lu r� JW Q LL OQZ0 a Lu D o z U Ju�j J t� � a"' cl zNOUN .jZO 4c) 00 00 cc° � W Lu FILE NUMBER 5053 SHEET 4OF7 ,i ,1 r \ u ;,F. tigtOudi T?ax r . ' r 4111 ,\ I 1 ' I- , . a t t ' it r ` `I r , 1 I `\ ~G t iI ilt i t' � f l i 4-- J is +...-. i I V 1 I '11, ; �S� l k- J �' P� , \ I r , 1 t 1 �_ :.�*.;, 11 -1i k \ " ' �'li,l t U, j ,11 `` ` '\ , ' �_! s- a` ` `'\ ,:i ; til \ `\\ \ \ \ f 1 i --; ' i{ 3' t ` \ ~`\ , . �• ..3 .. -.; \zaii �c `_-L7 \ T . i `t ' ' \,% a ' '' i LU- - -•- - --_ \, `,`\ i 1 tx \\ I `, , , ,! 1 � W e MARCH MO \ '�\\ '� , I" Ji DA 419, ` , ,17.E ,3792 \ \ i , I �', \\ \ , \ I ;r` I` Wit , j \ < < - _J , ,,. �. 1 `, ,r j j `\ •\ ' 1 :,-:E:� 111` mow(1 i ' - - _ - -z --•-_ -- I i, ; ` tt , / igI 4 11\r - Tye:. _ E u / r, f• _ 1. Jit r• �i 1 i, ; t »: ,,!1. ,., ;"!24.,. rr < ''t.' Fi 1 ; ,•: r ' Jj_ ter';' �� �� t;. Jrr\ t". -, �l\.\ .. l , -77777777777 ���,.,.....,.._ -• \ ;,: ) :I- r% !J V ,,,�,', ,� _ ` :..r _ _ _ , .:mac-:.; 41- > / - ;;"r ' - , t '- - - -- ` -,-- ; -, ,,' - �- ),r orf. 'r w-1.....+ ,' '``•' ' �EX(I/S\TING�►/O�/U��TFALL ,;•'!, rl ..11, i- - 1 /,I J- f ; I i I 2 yr. 43.9 / 1.0 10 yr. DITCH DESIGN HYDROLOGY 1.2 100 yr. DESIGN POINT INC. TOTAL C=0.25 C=0.3 ' \- -'f'**-- o0.2` AREA AREA 12+50 TO 15+00 2.25 0.00 0.75 0.00 8+50 TO 12+50 1.35 0.00 0.45 0.00 5+50 TO 8+50 Q (CFS) VELOCITY DEPTH 4+50 TO 5+50 2.00 0.00 0.50 0.00 1+00 TO 4+50 , 0.48 0.00 0.24 . 0.00 0+00 TO 1+00 . 0.00 2.00 0.00 4.00 DITCH G 5.90 0.00 2.00 0.00 . DITCH H 0.20 0.20 0.00 0.00 `� ' l I, , ---=-.,t_--- - -_-1,-7, r, . - , , 1, n t Ili # 11 I -----10' ` "'BERM 24' 4. _ _.._ BERM ?' _ 6 _____ -_ ,y,1- 64.0 3.1 CA 63.0_ - - f a - '� t .S r - VARIAB -: -: LE __ .f..-.,.-_tea_=...�°�;'w;Sye.firs-c��g y«.Krstc•aNrra.��Y:-•�_ •_•t-_,,._r.e=. `•^-_.. l \1 i Irl �' i I' l: Jr /' ,.--�•__._ -_'� f �� �l�i _ 'r��r:�(�� • - -- _.._.__.. _ _. __r- F �;;,;. - „r i 1 ; 14 � N u r I , F : `�{ - ?. 4, i� CA EC 3 TYPE B I EXISTING GRADE --� �i `� 1 - �: ....;;_' . =-`-ry-,,', ' ' '' Ii 1 I ; 0 100, :200 - 30Q --N•__ __. - - _- • _ �t•�r EC -2 ­­ ­­­-�- -? y t _.z . - i..,.� -,'-icrammc r i . I i M _ -..,.y; , �, _'i. _ , i _,i-,,.. Yca_,; j••_., -`tea ' i , *,� l `1 i t J O f j r --; , #. -._. - r _._1: •• '','ia*ft � =" . ,DQSilhdti'IOPOORAPHYBASMONAEF r�XVCYACN .2MI A _., �._. ; _ `• :,,_�; .., r 2 DITCH Q (CFS) DEPTH ! Y ' - 111YT CFS VELOCITY ', ` ; '' (' I ; �" --',-- _ (�• �/ Ve1Ta0N �ktVE1j' 2D1a' , r .- _ 12+50 TO 15+00 2 yr. 5.6 1.9 0.8' ,! ; ` .-1:�_..... _ �_ _ _ _ ; ,' 1.090 10 yr. 7.4 2.1 0.9' I # , . - \,` I: Ca=1 58 yr, 7 2.2 1.1' I 1,� - 100 9 .. _ --' .. _ .. _ ,r, {' ,;;,� - ---- \`\ �, TC=14 MIN. _ ; .' i__.-,,,."=ec:'i: i t ', _._ -•�.♦ r•, .\�,,_,�f t -f ra ` ,""' 1 \' \ \ I IN t 5 ,. ..-r ti i1, .{`'� C+'•�� �� " �s f s'4 'y �r �,j�" •\. �" /_ \\ \ \\` \t \., ``\\`\``♦ , � \,' �'ti \\ `\ ' I 12' 4-"'o"i'l 1 't j �yy■�}�� y/A� r f ' 'i '�i \ '!� ` •, \ i , `� `, `. \ �`\',; ;" • ', t / _ BERM . Yno it I I i ( i 7,r '.A/{i ES ilk i./ i ,l.' ! I t i \ \`\ \ \ $f / I---/-- "7 - }' i �'' : !. -f ' 'I ( 1 iia) i 1 9 tr' : \ ,\`�` - `' �'7 � �' � } ,\ \\ \\\,\ \ ,. I \'\,,� t\ ,\ `` t "�( i' _,....,�--' - 71 •,- 4 . 1 `� ~' i''i- , t 1 1 i',' 1,,1r �\ \ % o:.J r4�', \ \.t \ \ tt j t , / 2'l b.8 - - t _... . 4° F 1. > _ f ,. j fi ,t y j t - r �� • i _ �'� f1 !'� ` �. 1 ' i i ` s "y `t i ; ' �. f E�.`-2011lN _ _ s 7T - cal -n-, : - t t -. ---_ -� ; f_�'��:_;�,,- - TOTAL T4 POND E tax; , , : , y , 1 0 -; _... i :i �� r,., ::I a. :i 'I i # i/- i 1 4 ' ,, - j, ` �� f' �_ - , * `j J t f k_. _ W "`i'r ( "i t , i' ,, ! DITCH B Q (CFS) VELOCITY DEPTH .: _ _ ;},' ,\ -19.25 AC. CtV-73 •= {i : ;;; j ; ' 8+50 To 12+50 2 yr. 8.4 2.0 o.s' -----� ; s 1,i '., :�#-f- ' 12�/�1�'w 1t ' 'i;y;1 1 g• ,k (; BLOC 14fft• „�„z, SP ` , , 1 'i _ 1.09 10 yr. 11.1 2.2 0. _ fj 11 i'' '; , ,� 1 1; 1 _t 1 CA -2.52 - 11 y :-"', \ , 'i ,% 'WAt1c8�D IE�t1712<I jt 'il 'tt, i \ r.'' `�:: 1' r I \ it i r 1 Tc=16 MIN. 100 9x, yr. 14.7 2.4 1.0 t; Ig1Rt1C."tUE 3 a�o -'i' , '`3 I , ( r i ; %' -"i _"„ s s._ �" - !t 1 r 1 , { 3 i - I i 'ti'. ,!'f_t� ``-.:- - -\_... SEH--z.x._.._-- + ! �{ # 1-1 �;: i J v -ti , \ / ( = fi i' ! , + l'. t' ( 1 -trt.r' i I i .� - ,�' _. - �" M• - 'f ,i v , r ftQl {I t ! ; I ! 7 1 7 iFr`# 1 f ji ^ ` - - �' __ 11111111, _ _ _ . y. dit.i _. d 's J `\ 11 t l I t 16' 4 _ _ ; - '. -� il_) ' ; E �k't f i !'fj! - _ BERM ,�-! ' - �' f � , . j �M \ r t f f 1 , r , t - F � '% + fIl . 121 , 4i. - - - - --%_r .'-•"- - �•... "w, -...-t, %r ti !j -f% 1 r , ^�- i f% f r ! f 1' j . 70 t I tt \-.._. - ...."....•_-+,.-., _.- �'--r . •� - - T`-- "\ ( i 1 r /t ' t % r i j ! :' f f / `: 4 ":V __ :_.:_,. t '- >-. \ -. _. �._ �...c _•� . - - Of , _. _,;�!iR� _`it -.\,\ 'f �� �� c j rr± r`rft(.�J 1 E- i i ,�.r� S n ;� J% , f l 2 a _ - -- i' �\ �i y,\ It i1� ��; \\ ��i:1 ' �IAViA;. .irt, r !f r` I;, f) 1 O • '\ ,, ••, !;; ; ; 1! t .', t J;,;` % (CFS) 1 CITY o i DITCH C Q VELOCITY DEPTH _ _ _ , ._ \ F .,_..:.. „� - ! t ! ,,';J ","' 5+50 TO 8+50 2 yr. 14.6 2. .7 ._ _ % \ f' 1'',• ;, t; / rri, f,i:; 1 0% 10 yr. 19.5 2.3 0.9 -- ��,� : h �Y 1 , ; CA=4.79 �� .----n.. _.__ �_.. F- rr' -' `t1 1 - •�,u _ _ - �, J"�� ,.' •1 ; ;,;:r�;; s 100 yr. 25.9 2.6 1.0 I 1 ,' , ? i:; Tc 19 MIN. _ - -h- - _' I _- 12 '11 r i+�: - ,,, �--$ if 4 1. 0 J.36 / , _' -� - lV: ~' i '% 0.� --M , �r '~ - I f J r .^ �, ,::., � _. - _ _ _�_ , • ; f, -­ .C 3 TYPE A _ �i�y:(/i�� - - _. _.; r � ." , t l' 1!! r' !�!•. - Fs= C� 4f / Jtfr ;r --. •_.._.;:,f•._ _ _-.._...___... _--...._�,b<_- PRE -DEVELOPMENT DITCH D Q (CFS) VELOCITY DEPTH s`` - J'""'� `'"� - # 4+75 TO 5+50 2 yr. 18.7 5.8 0.6' f; ,` / i -.cif• ■■.,.-'--------_-_.• - ___6s.r 1 r / %/ `,r f . cf, � -_ -___._ _ _ L 10.096 I" , - ---'�. _ _. -fr, 1fl 25.0 6.3 0.7 11 / I I ,;, n- r - __ -__ - _ d 1 DRAINAGE AREA 19.25 AC. 0.0301 SQ.MI CA=6.29 00 „^„ y: ��. ,, : _, ; f' ,' ,i �`,. 11 a -,.:s-' ' l = -' r _� ' ` CURVE NUMBER 55 Tc=20 MiN. 1 yr. 33.3 6.8 0.9 :� -- -1 . 1 / 4' DITC�i - -S TC V __ r -� L�--� R` RAINFALL DiSTRIBUTiON ii :, _ =u' f _ l- ---11 _ _ ____- - \' POND AND SWAMP AREAS 0 �• - _ - -' \\ '\ ate. ;� °- <,".111 _, /'-.. __ _ _ .' `�; % -.---__. - _ �. z FREQUENCY 1.5 YR. 2 YR. 10 YR. `• \ S 8.18 \`,\ ,\.,� %_ _ __ __ *--•:,;%'. _ ALL (P) 24 HR (IN.) 3.75 IN. 4.00 IN. 6.00 IN. ___ .� j ~\ \ �' -- ".11,; ; ~' - ., ,%�'__ - - ,.�'' : ` �: _ 4 INITIAL ABSTRACTION (lA} 1.636 1.636 1.636 _ - -:%= --- " ��' ', �' 0.44 0.41 0.273 � " \ - _ _ - , , ! f'' --'-' - ;``''� 6 UNIT PEAK DISCHARGE OU (CSM/IN) 350 350 520 !�; _ ._. _ ' ,f , ' f ,/- - _ _• 7 RUNOFF (Q) (VOL INCHES) 0.43 0.53 1.52 P •56 14- -� - ' YN r ~ : w;' \� �' 8 POND ADJUSTMENT FACTOR (FP) 1.00 ?L BOARD AF _ - ` - " - , ARlE'COt�NTl'.._ - - _._-_ -*` �.. ---. •'," ";'�-';- 1161P`55£=1 -H,1' , w- �� �, � 9 PEAK DISCHARGE {CFS) ,, lVri' (T ALBEHARL& VM WA 1 QP (VF) (QF) 4.57 5.58 23.74 40.5 p. 346_-- ____: �y-�'Os: �� '' ',' D.B. 395.�pp. 1-10 ��_`\� :'�! RUNOFF (Q} (VOL, CU. FT) \VF 30,322 37.020 106.059 . _ . _ ..._... _ .. ____ _-- - _'amu' , Y, �r,,;rgo�"'��L= r _ __ _. % , i ..-,- _ _ --- _ _ POST -DEVELOPMENT w _.. __ ... --- - -- ---' �"' � PO ENT f '� O. - - - - \`•% ,f `- 1 DRAINAGE AREA 19.25 AC. 0.0301 SQ.M1 . -- ,_ ; '' /` ,:� _ : - _`�,� - CURVE NUMBER 73 _ -` \'\ %, .. , -_. .-. - . '•�� ,' TG 0.25HRS. . RAINFALL DISTRIBUTION 11 POND AND SWAMP AREAS 0 C=0.45 C=0.90 ECA Tc Q10 Q1 Q2 05 010 Q25 . 0100 2 FSREQ3ENCY 1 YR. 1.5 YR. 2 YR. 10 YR. 3 RAINFALL (P) 24 HR (IN.) 3.30 IN, 3.75* IN. 4.00 IN. 6.00 IN. 1.50 1.58 14.0 2.97 3.92 5,6 6.6 7.38 8.3 9.70 4 INITIAL ABSTRACTION (IA) 0.740 0.740 0.740 0.740 0.90 2.52 16.0 4,47 5.90 8.4 9.9 11.12 12.5 14.68 5 IA/P 0.50 0.20 0.41 0.273 I,CA=2»27 4.79 19.0 7.78 10.28 14.6 17.3 19.50 22.0 25.93 6 UNIT PEAK DISCHARGE OU (CSM/IN) 325 340 350 520 1.50 6.29 20.0 9.94 13.14 18.7 22.2 24.96 28.1 33.30 7 RUNOFF (Q) (VOL INCHES) 1.05 1.35 1.53 3.09 0.24 11.37 22.0 17.04 ' 22.55 32.1 38.2 43.02 48.6 57.69 8 POND ADJUSTMENT FACTOR (FP) 1.00 15.57 22.0 23.33 30.88 43.9 52.3 58.91 66.5 79.01 9 PEAK DISCHARGE (CFS) QP=QU*AM*FP 10.24 13.81 16.08 48.31 D 20 3"18 0.00 0.09 5.0 0.24 0.32 0.5 0.5 0.662 0.7 0.8 17.6 96 RUNOFF (0) (VOL, CU. FT) (VPOST) 73,183 94,384 106,734 215.824 24 HOUR DISCHARGE brig" Version 1sMr t. ornpumtions .. .... . ....... .. ALLOWABLE 0.85 1.47 1.'93 CFS. 11.67 CFS. BLE FLOalATE .CFS CFS,* lP 4 Albemarle County Water Protection Ordinance: Modified Simple Method QF*(VF/VPOST ) 3;..,1.•x;# < f * 3. 51n. RAINFALL DERIVED USING LOGRITHMIC REGRESSION 4 i Plan: Old Trail Block 14 with Block 11 Water Resources Area: Oevelo Development Area .., � � { r___--_,__-._.__...-_."-__..,__-,-L..:..___.._._.___._�_--__ _..- __ -----7 -1-.-------------- PROPOS 0.72 CFS 1.08 CFS.* 1.46 CFS. 11.52 CFS. t,., 1z1. ED Ft01'RATE a~�!�»�:`_``-' i` Preparer. TPR EGS B ASSOC. Date 1l1 -Jun -13 �mm � Y- y� � "" ` ` `' ~.`'. STQRt�I�{ATER DISCHARGE _DESIGN NARRATIVE :; '`,` '• j - : %=?;,�"-: ; ti. Project Drainage Area Designation I a la vurch a Conor «�o s 12 a 15 • THIS IS A MODIFICATION TO A SEDIMENT BASIN ESTABLISHED WITH WPO -2012-0013. i ` ��'`' 4e, ,: ` +' . , '``\\: L storm llutantexport.inpounds, L- (Pj)Rv/12. C(A)2.72 • THE OUTLET INVERT, SIZE, SLOPE. AND DISCHARGE PROTECTION HAS BEEN PRESERVED. .r �,. , 4 ";`, Rv meanrundfrcoetficient, Rv=0.05 •r0.009p) THE BASIN HAS BEEN ENLARGED TO RECEIVE RUNOFF FROM 19.25 ACRES IN VARIOUS STAGES Ap�����A - ` =- 1 ' ,/', :. Pi sKiali storrh correction tactor, 0.9 Of CONSTRUCTION. L V1l�!'1�E ;y I percentimpen!tousness • EXCAVATION IS BASED ON CREATING A BASIN LARGE ENOUGH TO ALLOW THE CONSTRUCTION OF ■■w,■r�a■■ r .Ywr` i P annual precipitation, .g3" inAlimmarle .D�!AV�LI,'\, y; Airojectareairtacresinsubjeci'drainagearea,�':�:z A COMBINATION BASIN / FOREBAY / BIOFlLTER. q'; � c pollula pplie centrat o11, nlgrl or ppm target phosphprus • TIRE PROPOSED GEOMETRY PROVIDES ADEQUATE STORAGE TO LIMIT DISCHARGE RATES TO THOSE 0. // r ; r It. ,. i factarapptiedblRR / ! , ,�, v required treatment volume'Sn cy, 0.5" over imperv.. area = A(1)4M6Q(C.5/12yw SPECIFIED IN VA 10.1-561. - 1;,•'` ` ,f fj ?. RR tegUiredtemovai, L(postj-fxL(pre) a THE RECEIVING CHANNEL IS ADEQUATE TO CONVEY THE DISCHARGE DUE TO THE REDUCTION IN If, II ;' : I1fs j �ftR removal gifictency ,RioorLCP�t) RUNOFF RATES. PLEASE REFER TO THE ABOVE CALCULATIONS. ; !� ;;'r j imperrviousCover Computatlon_(values ln"'teet&sq_uareteet) • THE OUTLET RISER USES A COMBINATION OF OUTLETS TO LIMIT THE DISCHARGE: (;'._�_.--, -� - -_ ,_ •• A 5" ORIFICE HAS BEEN LOCATED 1.0' ABOVE THE FILTER MEDIA. M ,` , i It J j em ...�,......,.., u poa sveloQment _ Area ost-developmeni - ;Area a - f7• " ' Roads - Length Widpi ssibtotat �' - �-` K A V -NOTCH WEIR HAS BEEN USED TO LIMIT DISCHARGE OF THE VARIOUS STORMS ABOVE :.i ___ _ -- _�.._n_ . _... ..'x•' , ,;,., ( o o ._o Stock - 0 _`� _ `6 wa3ssa; THE 1 -YEAR RECURRENCE INTERVAL -'` - - : `� ( "�; o' o o Stock, 14 og ni b5595 •• OVERALL PONDING DEPTH HAS BEEN MINIMIZED TO PROTECT LANDSCAPING. I .•= ,, _ 1--- - • AN ACCESS ROAD HAS BEEN PROVIDED TO ALLOW MAINTENANCE OF THE BIOFILTER AND "��"} __ Driveways Length Width -.nom subtotal 0 0 n�•-----^- -- _ _ 99285 FOREBAY. , -_-__ _ _ , _4_.� _ "; : ; - _ nd walks � o ,-_ o ` - o��-- ; o M - Bl4�k 11 o " o. 21267' • A LOW-WATER DIVERSION BERM HAS BEEN ADDED TO THE BIO-RETEN110N FILTER. THIS BERM IS 1.I ) R W 0 -0° U' Block 14 0 D�" 1792- Y %,- C o� `"""" `�" d _ ; - _ o 3s3s7? TO INCREASE THE FLOW-LENGTH/WIDTH RA110 OF THE FILTER AND HAS A NEGLIGIBLE EFFECT )'RA N - Parking Lots _� ? __ a, 1 2 `� 3 a ON THE STORAGE VOLUMES, AN OVERALL FILTER PERFORMANCE. lGravelareas Area ""- " --- ­ -------- Are2-- # �,.xQ,,Q= 0; Ci TM Q 610RETENTiON BASIN DIMENSIONS � ... til SFr-�0 . �Strucfures Area no.-'�subtotal�-�f� "- Area _ „ M. subtotal ELEVATION CONTOUR AREA VOLUME (C.Y.) TOTAL 1 t-_._._--- ,o -_..SSt Block 1 636 8 700 0 \ ` _. Q _.... - - - _- •-i-_ 41885: " __ " . i Block 14 1900 ____211-- 39900; 0 0 __ __-,__.�__ - 0-_-.-_-�p ___-____ ¢I ___ d; 81785 1 638 70flcu.yd. 720 `�' , , ,K66v;b-graaedpasture& Area...-....-.. -J------ r 1_ .Area � # ,100 1,104 cu.yd.1,824 \'' •- Yards and cultivated turf "- fir" 83853D,x U.68 = M 67Q62.aS�-� - �t5820 x 0.08= . i265s.64 642 21600 -_ 1,507 cu.yd. 3,331 .-_..__.. -- ......:-\ -• sAclive Crop land Area Area r - :_,-- �___- __ E 644 24,400 1.704 cu.yd. 5,035 E tM" - x o.25 = of x o.25 = i o __.._._._._._-_.__..__---.--.____�_-._l-______.__ _-_.-_._____--.-._.I.-_______. 1 ,. Otherimp -- ----- s .. .. : -- 4 } _.__ # - 645 25,700 928 cu.yd. 5,963 O,Future development - -- 1 z3 -M, 265 CU. YD. REQ. Impeivlous Covei . _ .>.. 1 ,.-,_ .. __.._ _ __n _ .., . ».�)3�(0 ne) g '(post) FOREBAY VOLUMES 344,500 S.F., IMP. AREA K11(k5) ._.: y: -0.35 A35:8 0.25 RUNOFF -- ---- -merit For Development -nAreas�exlsting Impervious cover -c= 20"!a) _ _ - �_ - �� Y ELEVATION CONTOUR AREA VOLUMED .(C. Y.) TOTAL I?___._t__-_____ ___.... _______ -- ._ + tp I�_ tP j_ ...{ fp tp ) RR �R a pe : 633 1,300 re ftv re i re L 2! T y, r Are i+ 0 z3 27,18 43.73 �t4�5 "bQ - tGesoprrieircAreay" "�" 634 1,600 54 cu.yd. 54 CU.YD. • min. vawes 636 2,500 152 cu.yd. 206 CU.YD. 637 2,900 100 cu.yd. 306 CU.YD. 25 YR. 7.00 IN. 0.632 0.234 650 4.26 83.23 297,492 &11#W10 8.50 IN. 1.636 0.193 600 - 3.13 56.51 218,797 100 YR. 8.50 IN. 0.632 0.193 670 5.61 113.15 392,358 l TRANS11ION DITCH D -E 4� 4+25 TO 4+75 1096 TO 1.095 `L ADDITIONAL DEPTH AND ARMORING ADDED TO ACCOUNT FOR HYDRAULIC JUMP DUE TO CHANGE IN GRADIENT AND WATER -SURFACE GRADIENT DUE TO CHANGE IN DIRECTION 4' 16' BERM ;%%,..�--t '� I , I - 40 � DITCH E Q (CFS} VELOCITY DEPTH 1+00 TO 4+25 2 yr. 32..1 2.9 1.5' rt 1.0% 10 yr. 43.0 3.2 1.8; CA 11.37 100 yr. 57,7 3.5 2.1 Tc=22 MIN. 16' '� 17-11- .1, •1_ 2 - EC -3 TYPI . o - �--,-3-�---- 10. 4' I•w---I--r. DITCH F Irt 0+00 OTO 1+00 CA=11.08 Tc=21 MIN. i 6' '� 0�5• - .1�� 31 1 EC -3 TYPE B o - -- -- ___, 4' S - i DITCH G Q (CFS) VELOCITY DEPTH 2 yr. 43.9 7.4 1.0 10 yr. 58.9 8.0 1.2 100 yr. 79.0 8.7 1.4 0�5• - .1�� 31 1 EC -3 TYPE B o - -- -- ___, 4' S - i DITCH G Q (CFS) VELOCITY DEPTH CL 10.0x 2 yr. 11.7 4.9 0.5 CA=4.13 10 yr. 15.6 5.4 0.6 Tc=14 MIN. 100 yr. 21.0 5.9 0.7 ' \- -'f'**-- o0.2` -!L"" EC -2 N �" DITCH H Q (CFS) VELOCITY DEPTH POND MAINT'NNAANCE ACCESS 2 yr. 0.2 2.2 0.3' % 10 yr. 0.6 2.5 O.4' CA= Te --5 MIN. 100 yr. 0.8 3.1 0.5' 100 -YEAR ELEV. 643.66 Q=68.2 CFS 30' V -NOTCH ELEV. 638.50 5" ORIFiCE9 ELEV. 637.00 RISER TOP 642.90 10 -YEAR ELEV. 641.45 Q=11.5 GFS 2 -YEAR . ELEV. 639.38 Q=1.5 CFS 1.5 YEAR ELEV. 639.08 Q=1.1 CFS 1 YEAR ELEV. 638.41 0=0.7 CFS (MAX.) 48" RCP RISER FILTER BASE . ELEV. 636.0 RISER SCHEMATIC 68.2 CFS (NOT TO SCALE) WATER QUALITY NARRATIVE • THE PERMANENT BIO RETENTION FILTER HAS BEEN DESIGNED WITH A FLOOR AREA OF 8,700 S.F. • IF THE BASIN WERE SIZED PER MS 11, THE FLOOR AREA WOULD BE 2.5% OF THE IMPERVIOUS AREA DRAINING TO IVAND AND WOULD TREAT 348,000 S.F. OF IMPERVIOUS SURFACES. • IF THE WATER -QUALITY VOLUME FOR THE FIRST I" OF RAINFALL WERE TO BE CAPTURED AND HELD AT 1' ABOVE THE FILTER MEDIA, THE FLOOR AREA IS ADEQUATE, TO TREAT 216,887 S.F. OF IMPERVIOUS SURFACES. • THE COUNTY HAS REQUIRED THE FLOOR AREA TO BE SIZED BASED ON THE AVERAGE OF THE ABOVE CRITERIA, AND DEEMS IT ADEQUATE TO TREAT 282,443 S.F. OF IMPERVIOUS SURFACES. THE BASIN SIZING ALLOWS 50.033 S.F. OF IMPERVIOUS SURFACES TO BE CONSTRUCTED iN FUTURE DEVELOPMENT. • THE 50,033 S.F. OF IMPERVIOUS AREA CREATED IN THE FUTURE MUST INCLUDE 8% OF ANY MANAGED TURF ASSOCIATED WITH THE DEVELOPMENT. . GARGAWMPROACILD TRAIL-80531BLOCK 141ESC-SWM PLAMESC-SWM PLAN 6-11-13.pm 410 Ua Ia .04 cc U 4, W2: (p c;) =5 4 -k Q� air a U o Ix w11= oz 0o u• V) I az �- (C ft.. 5 _J Q 0 `- Z 9 '� Q V Q � W O' �z q: VV W Q , 4 to W 1) 2 0 0 ,6 / O ft 1 l W Q l" z11 C �Z) y0 O� = co w z � u; C4� LL%ft W c 0 I �o W cc �� o� W a W 2 ,a" ? QyT` Cb W W FJ = CL 134 REVIS[ONS JUNE 11, 2013 JULY 17, 2013 01 DATE Nil MARCH 20, 2013 SCALE AS NOTED CONTOUR INI ERVAL 2 FOOT FILE NUMBER 8053 SHEET 5OF7