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HomeMy WebLinkAboutWPO200800090 Plan - Stormwater Erosion Control Plan 2008-10-16N 3 M L Nsi-TIN � L rat .f # £; g �, E tolls.. .,: k.:,.... .. i,.► -r. >�.. ,. M,� 5,..�. ,.. ,.:rr•{rv' .,:.r+ 'i..,r>..«rr:. �,.:..a•' ri +_ ,.' .+aus�»,: „� � _: «.:. ,a^ :: :, -; ... ._. :....... , >' �. :. SheetIndex Sheet Number Sheet Title C1 COVER AND NOTES C2 EROSION AND SEDIMENT CONTROL PLAN C3 STORMWATER MANAGEMENT PLAN GENERAL._NOTES OWNER: COUNTY OF ALBEMARLE 401 MCINTIRE ROAD MS -19: CHARLOTTESVILLE, VA 22901 APPLICANT: WESTERN ALBEMARLE HIGH SCHOOL ROWING CLUB BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO 5941 ROCKFISH GAP TURNPIKE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES ACCORDING TO CROZET, VA 22932 CONTACT: MS. MYRIAM PITTS RUNOFF FOR THE STATED FREQUENCY STORM OF 24 -HOUR DURATION IN EMAIL: mpittsftl2albemarle.org ENGINEER: TIMMONS GROUP 919 2ND STREET S.E. CHARLOTTESVILLE, VA 22902 P 295 -5624 TELEPHONE: ( 434 ) MS -2: FAX: (434)295 -8317 SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR CONTACT: SAM SAUNDERS, P.E. AND EVALUATION OF THE METHODS AND EFFECTIVENESS OF THE EROSION EMAIL: sam.saunders®timmons.com TAX MAP NOS.: TM 05700 -00 -00 -00400 THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE D.B. 377 PAGE 483 ZONING: RA AREA: 182.55 TOTAL ACRES OR PIPE SYSTEM SHALL BE PERFORMED. 0.40 DISTURBED ACRES ADDITIONAL IMPERVIOUS: 2250 SQ. FT. USE: BOATHOUSE BUILDING HEIGHT: 14' DRAINAGE DISTRICT: BEAVER CREEK RESERVOIR WATERSHED: BEAVER CREEK RESERVOIR TOPO & SURVEY: COUNTY GIS UGH11NG: THERE IS NO OUTDOOR LIGHTING PROPOSED AT MS -5: THIS TIME. IF AND WHEN OUTDOOR LIGHTING IS AREA TO THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE INSTALLED, IT WILL COMPLY WITH THE INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFFSITE BORROW REQUIREMENTS OF CHAPTER 18, SECTION 4.17 OF THE ALBEMARLE COUNTY ZONING ORDINANCE. FLOOD PLAIN: THE 100 YEAR FLOOD PLAIN IS SHOWN ON PLANS PARKING: NO ADDITIONAL PARKING WILL BE PROVIDED. AN EXISTING LOT EXISTS ON THIS PIECE OF LAND (2) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A AND WILL SERVE ANY NEED THE BOATHOUSE MAY PROVIDE ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT NEED. 'A' =r � k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iMEAT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 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. 6. 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 B LIMITED TO THE HOURS OF 7:00 AM O 9:00 PM. QU E TE T 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 STABIUZA11ON 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 80LBS /100SF. ALTERNATIVES ARE SUBJECT TO 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 90LBS /1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL FERTILIZER SHALL BE APPLIED AT 1000LBS /ACRE AND CONSIST OF A 10 -20 -10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS /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 80LBS /100SF. ALTERNATIVES ARE SUBJECT TO 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 REPAIR 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 DIKES 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. 4T, L WHIT"I"'I"I"I"I"I" , "" I ALBEMARLE Vwl"RGII�N`1A Deaver 4 ,l°i' -x. ,: rbF• Y� ""Lake 14. ,a.t•.•,•... cls; w °?i ..t. "•,••. �• to `i /• `ice' Ohl - W P rk ;i- LOCATION Maw At i • R N � VIC %iVIYV MAP SCALE: 1" = 21000' t� OWNER: COUNTY OF ALBEMARLE 401 MCINTIRE ROAD CHARLOTTESVILLE, VA 22901 PARCEL NUMBER 057 -40 ZONED: RA RURAL AREAS TOTAL ACRES: 182.5 AC. MINIMUM STANDARDS -19 MS -19: PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL MS -1: UNLESS OTHERWISE INDICATED, CONSTRUCT AND MAINTAIN ALL VEGETATIVE BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES ACCORDING TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER MINIMUM STANDARDS AND SPECIFICATIONS OF THE LATEST EDITION OF THE RUNOFF FOR THE STATED FREQUENCY STORM OF 24 -HOUR DURATION IN VIRGINIA EROSION AND SEDIMENT CONTROL HA DN BOOK AND VIRGINIA ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA: REGULATIONS VR 625 -02 -00 EROSION AND SEDIMENT CONTROL REGULATIONS. A. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE MS -2: ALBEMARLE COUNTY HAVING JURISDICTION WILL MAKE A CONTINUING REVIEW SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR AND EVALUATION OF THE METHODS AND EFFECTIVENESS OF THE EROSION MAN -MADE RECEIVING CHANNEL, PIPE OR STORM SEWER SYSTEM. FOR CONTROL PLAN. THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE MS -3: PLACE ALL EROSION AND SEDIMENT CONTROL MEASURES PRIOR TO OR AS THE OR PIPE SYSTEM SHALL BE PERFORMED. FIRST STEP IN CLEARING, GRADING, OR LAND DISTURBANCE. B. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE MS -4: MAINTAIN A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN FOLLOWING MANNER: ON THE SITE AT ALL TIMES. (1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE MS -5: PRIOR TO COMMENCING LAND - DISTURBING ACTIVITIES IN AREAS OTHER THAN AREA TO THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFFSITE BORROW HUNDRED TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OR WASTE AREA), SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OF THE PROJECT IN QUESTION. ARCHITECT/ENGINEER AND FORT BELVOIR FOR REVIEW AND ACCEPTANCE. (2) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A MS -6: PROVIDE ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT TEN -YEAR FREQUENCY STORM TO VERIFY THAT STORMWATER WILL EROSION AND SEDIMENTATION AS DETERMINED BY THE FORT BELVOIR NOT OVERTOP CHANNEL BANKS AND TWO -YEAR VELOCITY TO INSPECTOR. VERIFY NO EROSION OF CHANNEL BED OR BANKS. MS -7: ALL DISTURBED AREAS SHALL DRAIN TO APPROVED SEDIMENT CONTROL (3) ALL PREVIOUSLY CONSTRUCTED MAN -MADE CHANNELS SHALL BE MEASURES AT ALL TIMES DURING LAND - DISTURBING ACTIVITIES AND DURING ANALYZED BY THE USE OF A TEN -YEAR FREQUENCY STORM TO SITE DEVELOPMENT. VERIFY THAT STORMWATER WILL NOT OVERTOP ITS BANKS AND BY THE USE OF A TWO -YEAR STORM TO DEMONSTRATE THAT MS -8: DURING DEWATERING OPERATIONS, PUMP WATER INTO AN APPROVED FILTERING STORMWATER WILL NOT CAUSE EROSION OF CHANNEL BED OR DEVICE. BANKS. MS -9: INSPECT ALL EROSION CONTROL MEASURES DAILY AND AFTER EACH RUNOFF- (4) PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY THE PRODUCING RAINFALL EVENT. MAKE ANY NECESSARY REPAIRS OR CLEANUP TO USE OF A TEN -YEAR FREQUENCY STORM TO VERIFY THAT MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES IMMEDIATELY. STORMWATER WILL BE CONTAINED WITHIN THE PIPE OR SYSTEM. MS -10: ALL STORM SEWER INLETS WILL BE PROTECTED WITH INLET PROTECTION (PER C. IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY CONSTRUCTED STANDARD 3.07) AS THEY ARE MADE OPERABLE DURING CONSTRUCTION. MAN -MADE CHANNELS OR PIPES ARE NOT ADEQUATE, THE APPLICANT SHALL- MS-11: STORMWATER CONVEYANCE CHANNELS WILL BE PROTECTED WITH TEMPORARY OR PERMANENT PROTECTION AS THEY ARE MADE OPERA1nONAL ADEQUATE OUTLET " (1) IMPROVE THE CHANNELS TO A CONDITION WHERE ATEN -YEAR PROTEC11ON WILL BE PROVIDED. FREQUENCY STORM WILL NOT OVERTOP THE BANKS AND A TWO -YEAR FREQUENCY STORM WILL NOT CAUSE EROSION TO THE MS -12: WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, EITHER A UTILITY STREAM CHANNEL BED OR BANKS; OR CROSSING (STANDARD 3.25) OR A COFFER DAM WILL BE USED TO MINIMIZE SEDIMENT T AND DISTURBANCE. 2 IMPROVE THE PIP E OR PIPE SYSTEM TO A CONDITION WERE THE TEN -YEAR FREQUENCY STORM IS CONTAINED WITHIN THE MS -13: A TEMPORARY STREAM CROSSING (STANDARD 3.24) WILL BE PROVIDED APPURTENANCES; OR ANYWHERE A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX -MONTH PERIOD. (3) DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE PRE - DEVELOPMENT PEAK RUNOFF RATE FROM A TWO -YEAR STORM MS -14: ALL APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS PERTAINING TO TO INCREASE WHEN RUNOFF OUTFALLS INTO A NATURAL CHANNEL. •. WORKING IN OR CROSSING LIVE WATERCOURSES WILL BE MET. OR WILL NOT CAUSE THE PRE- DEVELOPMENT PEAK RUNOFF RATE FROM A TEN -YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS­ MS -15: IMMEDIATELY FOLLOWING WORK IN THE WATERCOURSE THE BED AND BANKS OF INTO A MAN -MADE CHANNEL. THE WATERCOURSE WILL BE STABILIZED. (4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT. STORMWATER MS -16: UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THESE DETENTION /RETENTION OR OTHER MEASURES WHICH IS STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA: SATISFACTORY TO THE PLAN APPROVING AUTHORITY TO PREVENT DOWNSTREAM EROSION. A. OPEN NO MORE THAN 500 LINEAR FEET OF TRENCH AT ONE TIME. D. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE B. PLACE EXCAVATED MATERIAL ON THE UPHILL SIDE OF TRENCHES. IMPROVEMENTS. C. FILTER EFFLUENT FROM DEWATERING OPERATIONS OR PASS THROUGH AN E. ALL HYDROLOGIC ANALYSES SHALL BE BASED ON THE EXISTING APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH, AND DISCHARGE IN A WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT CONDITION MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OF THE SUBJECT PROJECT. OFFSITE PROPERTY. F. IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES STORMWATER D. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY DETENTION/ RETENTION, HE SHALL OBTAIN APPROVAL FROM THE LOCALITY COM P ACTED IN OR DER TO MINIMIZE ER OS ION AND PROMOTE STABILIZATION. AlION. OF A PLAN FOR MAINTENANCE OF THE DETENTION FACILITIES. THE PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY AND E. ACCOMPLISH RESTABILIZATION IN ACCORDANCE WITH THESE REGULATIONS. THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE. F, COMPLY WITH ALL APPLICABLE SAFETY REGULATIONS. G. OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED TO A RECEIVING CHANNEL AND ENERGY DISSIPATERS SHALL BE PLACED AT THE MS -17: WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED PUBLIC OUTFALL OF ALL DETENTION FACILITIES AS NECESSARY TO PROVIDE A ROADS, MAKE PROVISIONS TO MINIMIZE THE TRANSPORT OF SEDIMENT BY STABILIZED TRANSITION FROM THE FACILITY TO THE RECEIVING CHANNEL VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, CLEAN THE ROAD THOROUGHLY H. ALL ON -SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE. AT THE END OF EACH DAY. REMOVE SEDIMENT FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORT TO A SEDIMENT CONTROL DISPOSAL 1. INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE EROSION OR- AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS SEDIMENTATION ON ADJACENT PROPERTY SHALL BE DIVERTED TO A STABLE REMOVED IN THIS MANNER. OUTLET, ADEQUATE CHANNEL OR DETENTION FACILITY. MS -18: REMOVE ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES WITHIN J. IN APPLYING THESE STORMWATER RUNOFF CRITERIA, INDIVIDUAL LOTS OR 30 DAYS AFTER FINAL SITE STABILIZATION BUT ONLY AFTER THE TEMPORARY PARCELS IN A RESIDENTIAL, COMMERCIAL OR INDUSTRIAL DEVELOPMENT MEASURES ARE NO LONGER NEEDED, AND ONLY AFTER AUTHORIZED BY THE SHALL NOT BE CONSIDERED TO BE SEPARATE DEVELOPMENT PROJECTS, FORT BELVOIR INSPECTOR. PERMANENTLY STABILIZE TRAPPED SEDIMENT AND INSTEAD, THE DEVELOPMENT, AS A WHOLE, SHALL BE CONSIDERED TO BE THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY A SINGLE DEVELOPMENT PROJECT. HYDRAULIC PARAMETERS THAT REFLECT MEASURES TO PREVENT FURTHER EROSION AND SEDIMENTATION. THE ULTIMATE DEVELOPMENT CONDITION SHALL BE USED IN ALL ENGINEERING CALCULATIONS. K. ALL MEASURES USED TO PROTECT THE PROPERTIES AND WATERWAYS SHALL BE EMPLOYED IN A MANNER WHICH MINIMIZES IMPACTS ON THE PHYSICAL, CHEMICAL AND BIOLOGICAL INTEGRITY OF RIVERS, STREAMS AND OTHER WATERS OF THE STATE. APPROVED by the Albemarle County Community Development Department Date_ t6,4knOS A "Ps P ROO* & V A L t-il �O2d 11 �-�- a-►so 5c..�rn DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER /ZONING ENGINEERING BUILDING OFFICIAL ARCHITECTURAL REVIEW BOARD FIRE OFFICIAL ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIA DEPARTMENT OF TRANSPOR TA TION TH op r S A M 1+ 2 a. c 0 AfIr <S?`I iO V N N q N E W v� a U. v U- w0� cl, IN en a fY~ ON a LD W U en z�_� 3:: at vi can = En It -0 F- c4 Ln a%rn N o+ �r M Tr O UJI z C7 cOC w U Z 0 N O n V NI C v Z 0 IA V a oz 4- o 4W V C 13 a ce W C � o CL w o Qcy z ° Z DATE 08/25/08 DRAWN BY V. DISH ._. DES C. KOTARSKI CHECKED BY A ND R IS S U E S SCALE AS NOTED �o o� �0 O c � 0 ° o p c C U M o c J z O U 0 c a� c *� 0 > o � ' m o ID � a U z W _ 0 0 w o0 L s � � 3 V � Z �x c E ._ U W O �-+ LU c 2 O C .J O U V) 0 0 L v U c[ _j N z Q 5 4- � --0 W W :2 o� ca 0 oU U 0 U 0 Uj x m w a� E 0 0 a ' i ' 3 U Iii O N U O C O o> in O JOB NO. ° 0 v s c 26649 ° 0 0 CL SHEET NO. a C1 �v i / r CPA,, E.... W OF, DORIS a r Gtr' UR fr if , l , •: PHASE J i x.. 1 h �r1 _.. ✓ LT✓> r D,3. 15,3 i PAS �w GRAPHIC S�ALxE 30 / 0 5 30 60 120" ° 580 m 1 i h =30ftEc .- . a -; z F ° ° SOIL DIVIS ' ! 36 C , tN d i ° a SF LIMITS OF CLEANING -'- ° ii.�',l�. {' t�oi,,., fmµ �l L _ • ° � ' F r f� `•, ; l° r ,P ° `r AND GRADING . p f -? T 1-11 . tr vim S ; - q • 4 4, ^,, M I e U dr a t _ z r y+ t ✓ r ! h i t- _.d_ C STAGING nr . R, =? R V VI', -- "`•y� ` � ; � � tip ,�? t� �.=s � � , N jp l �1 OIL DI IDES C t, _ ( y �W �D q ':r'7 6 tip•.. `t (TYP) Ts 00- ',1 %�'. I``� rs C � \ l � r tvr G Gi 4/i —�. ` \ -ii , 4 1...! ✓<3' f` >.. l "�i F l f 1 1 h s , -W r 7P ,� �_ DRAIN AG AREA � �< , - 0.40 4CRES SF 4 . 4 e. • 3 W Jam` �� � � � r � ` � • 'tv J t EROSION CONTROL MEASURES 3EA 1 %E4 CFi'E R' �>< "� ,, ©� .J �. -,, mC� i i, * VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER \ j EXISTING TREE LINE v Col < , = Y Cr �fr/1 _ \•�%! LIMITS OF DISTURBANCE 'fI 1F; 1,.f, ylr 'E;la {uJ/n!'i,c3 ry..1t✓Jt,7✓ 1 .. i r�l� !nl J1 L 'Rol' % � ® ® ® ®0�1 ®m DRAINAGE DIVIDE - ( rFC aLfI.P 015 1' �L.t�„� V (1 . ;0F?rF , ` t CE TEMPORARY STONE CONSTRUCTION ENTRANCE 3.02 B 'A 13-C -4 ',• _,_ SF SILT FENCE 3.05 I _ _q l< t G f .a , .� �, v r ,. ry'r. -a ��� a TEMPRORARY SEEDING 3.31 rl r� !�, L�3f�r 1NS GAP T11R,'dPIII � T5 TS 1;AX " ,,fry`' 0 7 -5(;c�r ' � � ' ��� -� PS PS PERMANENT SEEDING 3.32 R 1513:17 P J. , >17 A : ( ) DUST CONTROL 3.32 580 ` w .,v -- ! _ • ._, .,_ . x.�, 4 TP - TREE PRESERVATION AND PROTECTION 3.38 0 0_ SOIL DIVID S 36 C1`� ; ,. J 4 ; I r gg , 00 _ J j r, w..._., SF °o LIMITS OF CLEARING y�a'1'.1?�' F , pARK P 14 AND GRAD_ ING_ ,., .. � � � t,�,��J� , .• E, ,fJ<.., ., .��r, :��. s , - ». .� {7•` , 1��ka L�. t_I'�7 ,lJ .: r� Csr, e�`r. l_ 9 O i.,► -! rte! --..yy '° " "I r-._ i \ r tir . ii,' t :��.!'.�'''- �lr..'.call��l�.f.E -S _�.,1,.��ii'" 7 ITO ,1 ' O TA ,y, ;J7fi{� _ BL.Dd 4 Z. C± �•� /17.1 /+ _r_.�m�m....._ JT- ulTV G-- ; ° S "1 ] 1 r,,•. '''� '` �•' p /�J s- ;- .r ; 1� A Rl j t�' y J _ (� y y f3 ✓J r flt _ ITT j d r} i f J . 1 e_. ,i err _r __r SF� SOIL DIVIDES ?r r C? >_, t._. :n f " ? a 11'1^2. , 5 ?EA VF_,' "f `!. ? J,�? r VI Y (/TYP` t ' O .._ , , t 1 „1 t.. ... >, t. �J i � 7 . a - (/ _ r � 55r�" I /,< �" T J f) ^ F w 7P,- PS DRAINAGE AREA 0 _1 \ i .. \. . o ` .40 CRES gym j SF ., P1 , 4' y •L• ,.. V i O t " i err _ i`•. ,, v 04 •„� b _ V qCt to 9 r4 ?` - s ! 1 r 5 - s \, U� .j it t h �J%' ✓rl� �� o I PHI o n ... _ C ,� G RA AL . .. 5C E { ` ` 30 S, 0 15 30 60 In 1, Ai'. �i C �0 rs VCE_ ;40i`Vr,NJ i,?A'Z1 r r rJ 7I' ?E err ` N_.. (IN FEET) 3 rl C' ! J r1 i % l 1 fr <7 'V L. L C, VA �� 1 inch = 30 ft. t ? ZQA -RA, RUPA� AREAS PHASE II �. f ! t 1 H� d• 1. SET POSTS AND EXCAVATE A 4 "X4" 2. STAPLE WIRE FENCING TO 70' MIN. TRENCH UPSLOPE ALONG THE LINE OF THE POSTS. 5:1 EXISTING oCo� MEETING AS REQUIRED. A 3' PAVEMENT 6' FLAG THE LIMITS OF CLEARING AND GRADING AS WELL AS THE WOODED AREAS THAT ARE TO 4. DUST CONTROL - 3.39 DUST CONTROL IS TO BE USED THROUGHOUT THE SITE IN AREAS 3. REMAIN. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT r FILTER 6 At MOUNTABLE c THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. CLOTH MIN. BERM (OPTIONAL) EXISTING GROUND SIDE ELEVATION 4. INSTALL THE CONSTRUCTION ENTRANCE AT THE LOCATION SHOWN ON THE PHASE I EROSION AND M W p -j SEDIMENT CONTROL PLAN. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE 70' MIN. WA SHRACK _ 10' MIN. FLOW �/_ / 1 t B OPTIONAL) _ _- _ IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF THE SEED MIXTURE L DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS SHALL DEPEND ON THE TIME OF YEAR IT IS APPLIED. � MANNER. INSTALL THE TREE PROTECTION BEFORE ANY CLEARING ACTIVITY IS STARTED. TREE 10 EXISTING 12' MIN 0 PROTECTION FENCING SHALL BE MAINTAINED THROUGHOUT ALL PHASES OF CONSTRUCTION. NO MIN PAVEMENT 3. ATTACH THE FILTER FABRIC TO 4. BACKFILL AND COMPACT THE DISTURBED AREAS BE PLANTING SEED. THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. EXCAVATED SOIL. VDOT #1 COARSE AGGREGATE B POSITIVE 110. MIN. 5. INSTALL THE INITIAL CONSTRUCTION MEASURES SHOWN ON PHASE I EROSION AND SEDIMENT DRAINAGE TO V u CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AND MADE * MUST EXTEND FULL WIDTH OF SEDIMENT m FUNCTIONAL BEFORE ANY LAND DISTURBANCE TAKES PLACE INGRESS AND EGRESS OPERATION TRAPPING DEVICE i!4 a.INSTALL SILT FENCE (SF). PLAN W b.INSTALL ANY REMAINING SEDIMENT CONTROL MEASURES SHOWN ON THE PHASE ! EROSION AND SOIL DESCRIPTIONS SEDIMENT CONTROL PLAN. 12 MIN. 7. FLOW d 3 " MIN. AND SEDIMENT CONTROL PLAN AND THE COUNTY INSPECTOR HAS APPROVED THE EROSION CONTROL b 3 MIN. MEASURES, THE CONTRACTOR CAN CLEAR AND GRADE THE SITE. FILTER CLOTH sEc-nOhI A--A EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. V -701 FILTER FABRIC IMMEDIATELY AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL HAZARD OF EROSION IS MODERATE TO SEVERE. }.� STABILIZATION SHALL BE APPLIED IMMEDIATELY TO DENUDED AREAS THAT MAY NOT BE AT FINAL 36C - HEYESVILLE LOAM, 7 TO 15 PERCENT SLOPES. THIS SOIL IS DEEP, WELL DRAINED, AND SF ''I = 111141 --WIRE_ -� X141 -I!1- 3.05 -1 - REINFORCED CONCRETE DRAIN SPACE cE SECTION B-B 3.02 -1 STRUCTION OF A SILT FENCE WITH WIRE SUPPORT STONE CONSTRUCTION ENTRANCE 1 RI BEGIN CONSTRUCTION OF BOATHOUSE. 2 10. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS PERMEABILITY AND AVAILABLE WATER CAPACITY ARE MODERATE. SURFACE RUNOFF IS ale RAPID. THE HAZARD OF EROSION IS SEVERE. No Scale FENCING AND ARMORING EROSION AND SEDIMENT CONTROL NARRATIVE PROJECT DESCRIPTION THE PURPOSE OF THIS LAND DISTURBANCE ACTIVITY IS TO BUILD A PERMANENT BOATHOUSE 11. FOR THE WESTERN ALBEMARLE HIGH SCHOOL ROWING TEAM. THE BOATHOUSE WILL BE 2,250 DRIP LINE I 12. S.F. AND WILL REQUIRE TWO SMALL RAIN GARDENS TO TREAT STORMWATER RUNOFF. 13. ADJACENT PROPERTY THIS SITE IS BOUNDED TO THE WEST BY BEAVER CREEK RESERVOIR, WHILE THE EAST IS SNOW FENCE I BOUNDED BY BROWNS GAP TURNPIKE. THE NORTHERN END IS BOUND BY THE ENTRANCE ROAD FOR BEAVER CREEK PARK. / WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 15. EXISTING SITE CONDITIONS 00 '"" THIS SITE FEATURES AN EXISTING TOLL BOOTH HOUSE THAT HAS NOT BEEN IN USE. THE two i AREA SLOPES FROM THE EAST TO THE WEST, TOWARDS THE RESERVOIR. THE AREA IS WELL I � VEGETATED WITH TREES, HOWEVER CONSTRUCTION OF THE BOATHOUSE WILL NOT DISRUPT THE BOARD FENCE ,r,,,, EXISTING VEGETATION. CORD FENCE CRITICAL EROSION AREAS PLASTIC FENCE IT IS CRITICAL THAT DURING CONSTRUCTION EROSION AND SEDIMENT CONTROL MEASURES BE MAINTENANCE: MAINTAINED ON THIS SITE, AS THE SITE DRAINS DIRECTLY TO THE RESERVOIR, IT IS ALSO CORRECT METHODS OF TREE FENCING IMPORTANT THAT TREE PROTECTION BE SET UP APPROPRIATELY AND MAINTAINED SO THAT �S�IIIr] THE EXISTING VEGETATION REMAINS. AND AFTER EACH SIGNIFICANT RAINFALL. THEY SHALL BE CLEANED REPAIRED OR REPLACED AS NECESSARY THROUGHOUT THE CONSTRUCTION PHASE OF THIS PROJECT. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: EROSION AND SEDIMENT CONTROL MEASURES 1. THE SILT FENCE BARRIER WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT THE FABRIC. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM HALF WAY TO THE TOP OF THE BARRIER. STANDARDS AND SPECIFICATIONS OF THE CURRENT ADDITION OF THE VIRGINIA EROSION AND 2. THE SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. SEDIMENT CONTRGL HANDBOOK. THE MINIMUM STANDARDS OF THE VESCH SHALL BE AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE BY LOCAL AUTHORITIES HAVING JURISDICTION. r• CORRECT TRUNK ARMORING STRUCTURAL PRACTICES: +' 1. TEMPORARY CONSTRUCTION ENTRANCE - 3.02 A TEMPORARY CONSTRUCTION ENTRANCE TP "'" TRIANGULAR BOARD FENCE 3.38- 2 SHALL BE PROVIDED AT THE LOCATION INDICATED ON THE PLANS. IT IS IMPERATIVE THAT THIS MEASURE BE MAINTAINED THROUGHOUT CONSTRUCTION. 2 FENCE I SIL FENCE BARRIER - 3.05 SILT SEDIMENT BARRIERS SHALL BE TREE PRESERVATION AND PROTECTION 3 ION DOWNSLOPE OF AREAS WITH MINIMAL TO FILTER SEDIMENT-LADEN RUNOFFDFROM SHEET FLOW AS INDICATED. No Scale SEQUENCE OF CONSTR CTIQN:: ). IKLt l'Kt,tKVAIIVN ANU F'KUILUIIUN - 5.56 F'KUItUIIUN OF Ut51KAULL IKLLS FKVM 1. NOTIFY ALBEMARLE COUNTY COMMUNITY DEVELOPMENT TO SCHEDULE A PRE - CONSTRUCTION MECHANICAL AND OTHER INJURY DURING LAND DISTURBANCE AND CONSTRUCTION oCo� MEETING AS REQUIRED. ACTIVITY. 2. FLAG THE LIMITS OF CLEARING AND GRADING AS WELL AS THE WOODED AREAS THAT ARE TO 4. DUST CONTROL - 3.39 DUST CONTROL IS TO BE USED THROUGHOUT THE SITE IN AREAS 3. REMAIN. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT SUBJECT TO SURFACE AND AIR MOVEMENT. c THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. VEGETATIVE PRACTICES: 4. INSTALL THE CONSTRUCTION ENTRANCE AT THE LOCATION SHOWN ON THE PHASE I EROSION AND M W p -j SEDIMENT CONTROL PLAN. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE 1• TEMPORARY SEEDING - 3.31 ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR OAD SHALL Y L BE LEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED MORE THAN 30 DAYS SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION U v FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF THE SEED MIXTURE L DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS SHALL DEPEND ON THE TIME OF YEAR IT IS APPLIED. � MANNER. INSTALL THE TREE PROTECTION BEFORE ANY CLEARING ACTIVITY IS STARTED. TREE a� 0 PROTECTION FENCING SHALL BE MAINTAINED THROUGHOUT ALL PHASES OF CONSTRUCTION. NO 2• PERMANENT SEEDING - 3.32 THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON 0 3 S TORAGE WILL BE ALLOWED OUTSIDE OF THE TREE PROTECTION AREA IN THE FRONT OF THE DISTURBED AREAS BE PLANTING SEED. F- PROPERTY. _ 5. INSTALL THE INITIAL CONSTRUCTION MEASURES SHOWN ON PHASE I EROSION AND SEDIMENT t n. C V u CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AND MADE 0 m FUNCTIONAL BEFORE ANY LAND DISTURBANCE TAKES PLACE o U C2 a.INSTALL SILT FENCE (SF). W b.INSTALL ANY REMAINING SEDIMENT CONTROL MEASURES SHOWN ON THE PHASE ! EROSION AND SOIL DESCRIPTIONS = SEDIMENT CONTROL PLAN. 88 - UDORTHENTS, LOAMY, 2 TO 25 PERCENT SLOPES. THIS SOIL IS MADE UP OF AREAS 7. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON PHASE I EROSION THAT HAVE BEEN USED FOR CUTTING OR FILLING DURING THE GRADING OF ROADS, AND SEDIMENT CONTROL PLAN AND THE COUNTY INSPECTOR HAS APPROVED THE EROSION CONTROL HOUSING DEVELOPEMENTS, ETC. AREAS ARE TYPICALLY IRREGULAR IN SHAPE AND MEASURES, THE CONTRACTOR CAN CLEAR AND GRADE THE SITE. RANGE FROM 3 TO 50 ACRES. PERMEABILITY AND AVAILABLE WATER CAPACITY ARE 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS MODERATELY RAPID TO SLOW, SURFACE RUNOFF IS MEDIUM TO VERY RAPID. THE '° Y IMMEDIATELY AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL HAZARD OF EROSION IS MODERATE TO SEVERE. }.� STABILIZATION SHALL BE APPLIED IMMEDIATELY TO DENUDED AREAS THAT MAY NOT BE AT FINAL 36C - HEYESVILLE LOAM, 7 TO 15 PERCENT SLOPES. THIS SOIL IS DEEP, WELL DRAINED, AND GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS, PERMANENT STRONGLY SLOPING. IT IS ON NARROW CONVEX RIDGETOPS AND SIDE SLOPES. SLOPES STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE ARE SMOOTH AND ABOUT 200 TO 600 FEET LONG. AREAS OF THIS SOIL ARE LONG YEAR. AND WINDING. THEY RANGE FROM 5 TO ABOUT 50 ACRES. THE SURFACE LAYER OF 9. BEGIN CONSTRUCTION OF BOATHOUSE. THIS SOIL IS BROWN AND STRONG BROWN LOAM ABOUT 7 INCHES THICK. 10. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS PERMEABILITY AND AVAILABLE WATER CAPACITY ARE MODERATE. SURFACE RUNOFF IS IMMEDIATELY AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL RAPID. THE HAZARD OF EROSION IS SEVERE. STABILIZATION SHALL BE APPLIED IMMEDIATELY TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 11. ONCE SITE HAS BECOME STABILIZED THE RAIN GARDENS ARE TO BE CONSTRUCTED. 12. DISPOSE OF ANY EXCESS MATERIAL IN AN APPROVED WASTE AREA. 13. ONCE THE SITE IS RESTABILIZED AFTER CONSTRUCTION OF RAIN GARDENS, AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE THE REMAINING EROSION CONTROL MEASURES. 14. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE COUNTY ENGINEER IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 15. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 16. BUILDING PERMITS WILL BE ISSUED FOR LOTS CONTAINING EROSION AND SEDIMENT CONTROL MEASURES UNTIL THE INSPECTOR DEEMS THE MEASURES ARE NO LONGER NEEDED. MAINTENANCE: ALL EROSION CONTROL MEASURES SHALL BE PLACED AS THE FIRST PHASE OF ANY LAND DISTURBING ACTIVITIES. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THEY SHALL BE CLEANED REPAIRED OR REPLACED AS NECESSARY THROUGHOUT THE CONSTRUCTION PHASE OF THIS PROJECT. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. THE SILT FENCE BARRIER WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALF WAY TO THE TOP OF THE BARRIER. 2. THE SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. r� TH 0� l� p 0 ,b kSr ©NALG v N 0 ofo+ N L1J N y Q U. W O D r a _j tj 0000 W py 0 di (D W V Ivi ol�� vi = U C F- N CT N CN M O S Q w S n w w i z O .•1 V) O r • 0 am Z 0 C" O C V z L 0 V NJIE L U gA � an 0 �«- o iC . In H �R •I•a d !Q � 0 0 9 Q DATE 8/25/08 DRAWN BY V. DISH DESIGNED BY C. KOTARSKI CHECKED BY S. SAUNDERS W 4 Z w SCALE I" = 30' W W D 0� oce Q �, Z 1 6u oCo� �' o Q W V) a� 0 JI /_� z c Ce •-1 z s O M W p -j Q ° < CL U v a .o L O 0 � J o a� 0 ~ � (� 0 3 J 1 F- 0i y o _ z t n. C V u 0 0 m c O v a o U C2 W F- o = J � Z Lc � 3 ,Q ( W �, rn W � '° Y E""'1 CO }.� r m Q A C 0.0 1 6u oCo� EU W W V) C W JI /_� c D U D Ce •-1 z 0 O c p -j Q ° Q z Z rn a .o L LU uj},,//.�, F v = Vl o TO J � a 0.0 o m c�. w JOB NO. 26649 LLJ > •� U O O 0 O oCo� W _E - 0 0 c a .o W Eo 'd U � C o m v °� v o JOB NO. 26649 •c c O v a SHEET NO. C2 4 0- ­CRAIRL ar 1 l)"1_? DOP t Q YROWAI' ,4P E TI-JI t<7 I- �LOTTESVILL, lv�l 22901 TAX MAP 0,57-5(;J'� 07 `7�UQA AREA S' L _7�0 0 A C 580 4, 7- - - 2 SUB-DRAINAGE AREA (TYP> CRECK PARK _J 3EA VER AOA '41 _'HAPLC1­7z:/V1i I U AX BLDG' tv,' 286`9 PkG'E_,, 72 -7 X '­ -RAIN r. Z2NE R, Rib R% A L -AR-EA11- BARREL 2 08 All, "N 140SF -AP/FR N 55SF WFSM 25' N. OWSE_ t-'LbS °A f pit , "D 024 31E ILL A/f- DRAINAGE AREA '7' -VBD LO G.�-IARL 0 F7 2 "f 0 02 ACRES &1AP D57-60 2 5 -? \ a w r } 0 .7.. 0 \ � '� \% ` � / j ,, A \ . � ; � « A t , \� w `` fi, r $$ 1 9 A GE `2 f: 100- YR. WA"`tER'_ 5-IG N 5 go, a", A", -s FAC&-ELEVA�ON X &D A t-55 R)AIN U) "GARDEN #1 A O)i _11 0 0 0 J 00 7, O f f", 0 0 0 0 4) RAIN 0 *BARREL JI RAA-( 0 ilk J A60SF-WFSM Ail 0 0 111' --0 5_r'11390�EN #2 0 N 40 to ­0 NORMAL 0 04�/ WATER 0 vilt on 10 0 am gleam Noe m M' SURFACE gas 0 7 2-VBDN 1'4AP/F y 0 03 BEA VER CREEKl "o RESERVOIR GRAPHIC SCALE 0 COtiN TY' OF A LBE1Vf',-1RLL 30 0 is 30 40 120 P\/A/VCE ADMINISTRA'TiON 41 149 401 '11001\177RE ROAD il 0 sto I (IN FEET) Ct -/ 4RL 0 `_TES'0'L1'_ E*, 0 MA/D 0579 ­10 0 1 inch 30 ft. Al" 0 A a 0 , PAGE 48,3- RURAL AREA11�� NOTE: RAIN GARDENS HAVE BEEN GRADED TO TIE INTO EXISTING TOPOGRAPHY. THE EXISTING TOPOGRAPHY IS PER GIS AND MAY VARY PER THE ACTUAL SITE. THE DETAIL SHOWN ON THIS SHEET PROVIDES MINIMUM REQUIREMENTS AND DESIGN GUIDELINES FOR THE RAIN GARDENS. STORMWATER QUANTITY CALCULATIONS ARE NOT NECESSARY SINCE THE DISTURBED AREA IS LESS THEN 1% OF THE ENTIRE DRAINAGE AREA THAT DRAINS TO BEAVER CREEK RESERVOIR. 0 2XI ,51■ F_ z W Q I gi 0 <1M 9 14C)SF-AP/FR 155SF -WFSM f 2 -VBDN b __ kt.. 1?5 5 GRAPHIC SCALE 10 0 5 10 20 40 (IN FEET) I Inch -: 10 ft. x_556 .:RAIN GARDEN #1 ROOF DRAIN RAIN BARREL COLLECTOR OVERFLOW CONNECTION FIRST FLUSH WATER SURFACE �,\\/ \7777 STATE APPROVED BIO-FILTER MIX OR TESTED AND APPROVED EQUIVALENT. DEPTH = 2.5' SLOPE = 0.003 SPILLWAY ELEVATION IS EQUAL TO FIRST FLUSH WATER SURFACE V. I•vu VINE V - L 1. BOTTOM OF BIOFILTER 3" OF PEA GRAVEL SHALL BE PLACED GRAVEL (AASHTO M43 MIN.) BETWEEN THE FILTER MEDIA AND GRAVEL MEDIA 1 ROOF DOWNSPOUT SYSTEM WITH RAIN GARDEN FNo Scale 1.0, NOTE: RAIN GARDENS TO BE CONSTRUCTED SUCH THAT THE FIRST FOOT OF STORAGE WILL HOLD 85.5 CUBIC FEET. EACH RAIN GARDEN SHOULD BE CONSTRUCTED WITH A 3' WIDE SPILLWAY WITH 3:1 SIDE SLOPES THAT WILL TIE INTO EXISTING GRADE AN ADDITIONAL FOOT OF FREEBOARD OVER TOP OF THE SPILLWAY IS REQUIRED. GRADING FOR THE PROPOSED BOATHOUSE SHOULD NOT ENCROACH ON ANY EXISTING TREES' ROOT STRUCTURE. RAIN GARDEN'S WATER QUALITY REMOVAL RATE IS 507., EXCEEDING THE REQUIRED REMOVAL RATE OF 37% PLAN77NG SCHEDULE KEY QNTY. BOTANICAL NAME COMMON NAME MIN. INSTALLED SIZE ROOT REMARKS I Area T )e yt pro-development 0.23 0.82 0.70 TYP E post-development Developm ant Area Area Roads Len ,9th 118.77 6 0 Width subtotal 15.38 1826.683 0 0 0 0 0 DENSE BRANCHING, V8DN 4 VIBURNUM DENTATUM ARROWWOOD VIBURNUM 24" HEIGHT CONT, WELL ROOTED, SELF SUPPORTING 1826.683 0 0 0 0 0 STEMS 0 Driveways Le th and walks 01 01 Width 01 01 no. 01 01 DENSE BRANCHING, IG 10 ILEX GLABRA INKBERRY HOLLY 24" HEIGHT CONT. WELL ROOTED, SELF SUPPORTING 0 0 01 01 01 0 STEMS 1 MIX OF SEED AUTUMN BENTGRASS 2 1 3 SEED PER AP /FR 280 SF 509 AGROSTIS PERENNANS RED FESCUE SEED MANUFACTURER'S 0 Gravel areas Area 50Y. FESTCA RUBRA x 0,70 = 6 RECOMMENDATIONS x0.70= 0 SEED PER WFSM 315 SF WILDFLOWER SEED MIX* 242 Area 22501 01 SEED MANUFACTURER'S 2250 Actively-grazed pasture & yards and cultivated turf Area x 0.08 = RECOMMENDATIONS * "WILDFLOWER SEED MIX" SHALL BE A MIX OF PERENNIALS AND ANNUALS HARDY IN VIRGINIA. FOLLOW MANUFACTURER'S RECOMMENDATION FOR SEEDING RATES AND PROCEDURES. 0 0 RAIN 0 O 13ARREL 0 1 60SF-WFSM 0 5 1 G 0 0 0 0 X 0 U\ 0 0 0 0 X, -VBDN 2 140S� AP//FR GRAPHIC SCALE 10 0 5 10 20 40 (IN FEET) I Inch= 10 f Short Version BMP Computations For Worksheets 2 - 6 Albemarle County Water Protection Ordinance: Modified Simple Method Plan: WAH BOATHOUSE Water Resources Area: Not sure Preparer: G. KOTARSKI Date: 19-Aug-08 Project Drainage Ar:-a Designation L storm pollutant export in pounds, L = [P(Pj)R,4121 I C(A)2.721 RV mean runoff coefficient, Rv= 0.05 + 0.009(1) Pi small storm correction factor, 0.9 1 percent Imperviousness P annual precipitation, 43" In Albemarle A project area in acres in subject drainage area, A C pollutant concentration, mg/I or ppm target phosphorus If factor applied to RR V required treatment volume in cy, 0.5" over imperv. area = A(1)43560(0.5/12)/27 RR required removal , L(post) - f x L(pre) 016RR removal efticricy, RR100IL(post) ImnArvinnit Cnvar CninnidsHnn Ivsklign-t in foot A animra fantl Item f I (p I (pro) L(pre) L(post) RR % RR Area Type I Area T )e yt pro-development 0.23 0.82 0.70 Area post-development Developm ant Area Area Roads Len ,9th 118.77 6 0 Width subtotal 15.38 1826.683 0 0 0 0 0 1826.68 0.22 Length Width subtotal 1826.68 118.77 15.38 1826.683 0 0 0 0 0 0 0 Driveways Le th and walks 01 01 Width 01 01 no. 01 01 subtotal 0 0 1 0 Length Width no. subtotal 0 0 0 0 01 01 01 0 1 1 0 Parking Lots 1 1 01 2 1 3 4 1 1 2 3 4 0 Gravel areas Area x 0,70 = 6 Area x0.70= 0 Structures Area R 01 of no. I 01 01 subtotal I 24_2 0 0 242 Area 22501 01 no. 1 01 subtotal 2250 0 0 2250 Actively-grazed pasture & yards and cultivated turf Area x 0.08 = Area 1x 0.08 = 0 Active crop land Area I x0.25= 0 Area 1 Ix0.25= Other Impervious Areas impervious rover t, �, �,:, -,! amt ,(pro) I Rv(post) 0.20 6 3] L. , I .' col ((post) Rpost) C f I (p I (pro) L(pre) L(post) RR % RR Area Type I Area T )e yt tk X13 0.23 0.82 0.70 -0.12 0.70 Developm ant Area Development Area 0.12 0.22 0.35 0.13 0.22 Drinking Water Watersheds 0.1 Drinking Water Watersheds fl 40 4i 4W-14 0.12 - min. %aiues Radavainrimant (Fnr navainnmant Arnamt ami4ina imnarviniist cover > 20%1 C f I (pro) Rv(pre) I L(pre) I L(post) I RR I % RR I Area T )e yt tk X13 0 0.23 0.$2 0.70 -0.04 Development Area 0,12 0.22 0.351 0.1 Drinking Water Watersheds fl 40 4i 4W-14 0.12 Rural Land N SH 0 S 1 Sli 3t M tz Vo�, 0 32 10 11-N JV >N E 0 0 E C LU N C W. U. LL w0 L. lu 'W z UJ Pq -Jj Ig OR 0 fLp Q UA U M UA Z g _,T 0� w-A uj X LM U<- .4 qT CI V) z in L. Z LU U cam' % C . C) Z F_ rq in > LLJ 1W _J 0 Ilk M LU 0 ce. a W E 00 > W C-0 ui 0 ry U 0 z > 0 DATE > 0 ce ::1 08125108 >_ DRAWN BY V. DISH DESIGNED BY • C. KOTARSKI • CHECKED BY • S. SAUNDERS SCALE 1 lf=30' • UJ 0 F- 0 < 0 < z C z t 0 0 0 > F- 0 LE U Z 0 W U UJ UJ Lr) 0 - Zv M Q 0 I E LU U UJ .,JCY., F_ (A 0 Cy. W < 57 < LU LU 0 0 F_ > CL 0 L_ CL z X 0 4) LU F- C E LU .401) .2 0 0 JOB NO, 26649 C: .2 SHEET NO. C3