Loading...
HomeMy WebLinkAboutWPO201600054 Plan - Stormwater 2016-10-10TM OWNER ACREAGE ZONING DB/PG 'W" P NUMBER It t I A 02000-'00-00-01900 WOODBRIAR ASSOCIATES 100.51 AC RURAL 690/232 0 WOODBRIAR ASSOCIATES 3.04 AC PRD 1242/668 jilt B 032GO-00-00-OOIAO C 032GO-07-00-04400 ROBERT BELL OR J ESSI CA SWE EN EY 0.11 AC PRD 1749/069 If T 032GO-07-00-04500 WILLIAM AND SARAH WILSON 0.11 AC PRD 3383/178 D SCOTT R. COLLINSI:2� I I HOIVIAS AND KATHY HYRE 0.09 AC PRD 1211/688 0 J 032GO-07-00-04700 DAVID GAYLORD 0.11 AC PRD 1346/659 Lic. No. u3b (91 0 J \ G 032GO-07-00-04800 MICHAEL AND KATHERINE PEARL 0. 10 AC PRD 4514/719 r - I __1 \ � \ \ ', / / / / / / I , I " I I \ \ \N' \ -� jib -?14 V\ (p d H 032GO-07-00-01700 JOHNMBURU 0.08 AC PRD 4677/257 t -07-00-01800 RODERICK BURTON 0.08 AC PRD 3640/217 IONAL 'V LLJ -6 1 032GO 610 Ld C J 032GO-07-00-02500 BRIARWOOD HIOA 0.66 AC PRD 781/574 4 L I It C C�l K 032GO-07-00-02400 ANGELA MAWYER 0.08 AC PRD 4366/589 -07-00-06700 WILLIAM VEST 0.08 AC PRD U) L 032GO 3271/292 ? / I I I I `\\"" \ \ , \ , �N, MAN;$G ?'��QP�S 1� t: 0 P 4� RES FRV�D//S LOPES,, It m _J P, M 032GO-07-00-06800 TODD AND SONIA CABELL 0.08 AC PRD 4381/351 4' 4a­ _J N 032GO-07-00-06900 MATTHEW CONKLIN 0.09 AC PRD 3897/296 0 C) 'p, v 0.09 AC PRID 3389/ 0 446 0 032GO-07-00-0700 0 DAWN AND WI LLIAM EADI E 062 p 032GO-07-00-07100 KI M BERLY AN Di STEVE N GE E R 0.09 AC PRD 1346/267 C: S6�?-20',�3v (D -i, N 0 I Lt 032-GO-07-00-07200 BERNARD AND TOMOKO MARSHALL U.utp M, rRu 1949/179 . ... .. .. 134,534 v, 0 0-07-00-07300 CYNTHIA KELLY LIVING TRUST 0.09 AC PRD 4362/633 ei, R 032G V 5 032GO-07-00-07400 GREGORY AND RENEE SAMPSON 0.09 AC PRD 1406/477 /3 PRD -436 - - - -- - - - / / / / / / , I \ \ \ I -.-, - - - .- - I , - , 7- -A T 032GO-07-00-07500 THIEN AND TRUCVAN NGUYEN 0.09 AC 1691/714 . ff- 7 F '0I /7 0 /5 -434 - U 032GO-01-00-01700 LORENZO AND TON IA RIVERS 0.10 AC PRD 2266/297 V) . ......... Q) < V) v 032GO-01-00-01800 SUSAN CHAMBERS -ROSE 3551/264 u.uJ At- PRD x W 032GO-01-00-01900 KEVIN HINES 0.09 AC PRD 3824/468 T_ x 032GO-01-00-02000 ALLISON ALLEN 0.09 AC Z) U GABOVEGROUND_ /EXISTIN* (173 < ELECTRICAL LINE -01-0 PRD Y 032GO RN AND JANICE YANG 0.09 AC 298 Z 032GO-01-00-02200 DEBRAH SHELOR 0.09 AC PRD 1825/128 x Z AA 032GO-01-00-02300 CARRIE O'CONNOR OR LISA SCHOTT 0. 10 AC PRD 4571/519 (:)F) 525/220 % P) -01-00-02400 LAURA BRADY U. ii Ai_ FKU 4 0 Cq To A BB 032GO cc 032GO-01-00-02500 MOONJAKE, LLC 0. 10 AC PRD 4740/31 V) 0 0 L 032GO-01-00-02600 ADAM AND JAYDA EVERE I I U.U�) AC PRD D D EE 032G -01-00-02700 BRIAN AND DEBORAH STOLLINGS v 0 0. 10 AC PRD uJ D FF 032GO-01-00-02800 JOHNSON AND ENGLISH LEASING, LLC 0. 17 AC PRD C: TREELINE /U GG 032GO-06-00-03300 JAY AND TIFFANY THOMAS 0. 12 AC PRD 4741/634 0 BB /EXISTING 032GO-06-00-03200 JIN AND JAE-AH1 SHIM 0. 15 AC PRD 4718/395 0 I I 032GO-06-00-03100 RONAND AND DAISY ROSARIO 0. 12 AC PRID 4732/743 HH C -05-00-OOOAO WOODBRIAR ASSOCIATES L 11 032GO 1.70 AC PRID KK 03200-00-00-006AO UVA REAL ESTATE FOUNDATION 460.60 AC PDIA 2712/32 LL 03200-00-00-004AO SIGNEY HECHT LIVING TRUST 15.39 AC RURAL -0 0 PGo-oo-o i-oo:LOo /I M P: D 0 MM 02000-00-00-19200 JOAN KINDIG 11.89 AC RURAL 0 E 1�,. q 2 'WOODBRIAR-ASSQCI /,OWNER.:, ACREA(i 0 AC 4 E 00 Z NING: "y 0, ry I/ D,,k/PG: ` Q PRD, X 14 55�1097 0 -4 0 > Lu Ny Q) 'q?, i ij: i L: V11 N EXISTING 8" DI WATIERLI E .7' ....... ....... . . ... 0 �qa CY) V) Itr 0 Y, 7- �ryl 0 _E N 1�0 (2 N r V) Q) Lu J/ LLJ mm, U V) f CHMA R QP�-O�S WE R'M V I < 0 b NCHMA- R E tE tU) > f iLE XISTING ioo-Y R L 0 uJ CL FLOODPLAIN (T EXISTING SANITARY 5L_vvI_1\ 'EXISTING 8" SANITARY SEWEI �,C6( 'EASEMENT (D.B. 4513, P -72)--- F EXISTING MANAGED 0 STEEP SLOPES (TYP.) 0 0 EXISTING Lq < u TREELINE '334 In, (D EXISTING P E VE 0 RES R D// STEEP SLOPES (TYP.) 'A k I T 0 Q) re tI r f -,1'-24 qb7 0 X 25 0 tU1 :D E C Ili 11 \ I I I I _0 i 0 - %0 P k iI: �� I Lu > 1 �311" A8"O-32"W 7 LLJ f Lu N890 07' 2 7-26' wv \N\ k S�0\48-' -83"W 37 EXISTING FLOODWAY Lu LLI "464"W' �7 Ld 6 Lu 88 2 Lu LIMITS S L V) 0 CL J4t ui ? ID NORTHFORK Q, 0 0 < U) CD < NN\ MtWil kit �7 N -T TT-- Lu 326.240 > 11W i�lLil:llLl�lkl'��l'I"I,t�ll"..I.tlr�i'l-1,:ti,l:'.., N Lu lit , I , I � t I -71 550 3�40.69 I - E tui ttu ul v V i to JOB NO. LL K K ly 11 122071 V) G 21 �77 SCALE RAPHIC LE 17A. �A �MENfi`_ SCA .8 -0 SC I t t60 0 30 60 220 240-1 9 60' 7� 17., SHEET NO. CL 7 ttit2 1 inch= 6o ft. (IN FEET) F� GENERAL NOTES 1. THE OWNER/DEVELOPER OF THIS PROPERTY IS: WOODBRIAR ASSOCIATES P.O. BOX 5548 CHARLOTTESVILLE, VA 22905 2. THESE PLANS HAVE BEEN PREPARED BY: COLLINS ENGINEERING, INC 200 GARRETT STREET, SUITE K CHARLOTTESVILLE, VA 22902 TELEPHONE: (434) 293-3719 FACSIMILE: (434) 293-2813 3. SOURCE OF TOPO & SURVEY: BOUNDARY OF THE SITE WAS PROVIDED BY LINCOLN SURVEYING IN FEBRUARY, 2013. TOPOGRAPHY PROVIDED BY THE ENGINEERING GROUPE FROM AERIAL FLOWN TOPO IN JANUARY, 2007. TOPOGRAPHY SURVEY UPDATED IN DECEMBER, 2015, AND FIELD -VERIFIED IN DECEMBER, 2015. 4. ZONING: PRD 5. TAX MAP AND PARCEL NUMBER: TMP 32G-1 6. USGS DATUM: NAD 83 7. LOCATION/ADDRESS OF PROJECT: SUNSET DRIVE 8. PROJECT AREA: 16.92 ACRES 9. SITE PHASING: NONE. 10. PUBLIC UTILITIES: NO CONNECTIONS PROPOSED WITH THIS PLAN * COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTOR'S WORK, SAFETY PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND REGULATIONS. WE SHALL NOT ASSUME RESPONSIBILITY FOR ANY CONSTRUCTION STARTED PRIOR TO PLAN APPROVAL. EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING: 3.01 SAFETY FENCE.' A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. 3.02 CONSTRUCTION ENTRANCE: A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS 3. 05 SILT FENCE: A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONS7RUC77ON OPERATONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNE L FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED /N ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 3.07 STORM DRAIN INLET PROTECTION: A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP R R P INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PROTECTION APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA77ONAL BEFORE PERMANENT STABILIZA7ON OF 7HE CORRESPONDING DISTURBED DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE.- A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. 3.14 TEMPORARY SEDIMENT BASIN: A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSTRUC77NG AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND 'DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SET7LE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBU77NG DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. ]HERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUC77ON OF A TEMPORARY IMPOUNDMENT. 3.18 OUTLET PROTECTION: STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE POTEN7AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCEN7RATED STORMWATER FLOWS. APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS 3.19 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PR07ECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE POTEN7AL FOR INFILTRATION, AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS USE WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETA7VE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW COND/77ONS 3.31 TEMPORARY SEEDING.• THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND SEDIMENTATON BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONS7RUC770N UN77L PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION: THE ESTABLISHMENT OF PERENNIAL VEGETA7VE COVER ON DISTURBED AREAS BY PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY STABILIZE DISTURBED AREAS /N A MANNER THAT IS t(,V/VUMA,AL, AUAI-1AWLt IV )/It IVIVUIIIVIVO, fiIVU fiLLVYYJ OLLtt./IVIV Ur Irm MVJ/ APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE77ON OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA7VE COVER. 3.38 7REE PRESERVATION AND PROTECTION: PROTECTION OF DESIRABLE 7REES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE 7HE SURVIVAL OF DESIRABLE 7REES WHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICARON, DUST AND POLLU77ON CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING AC77VI77ES. 3.39 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUC77ON ACTIVITIES TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. SOIL DESCRIPTIONS 16- CHEWACLA SILT LOAM - o% TO 2% SLOPES SOIL CONSISTS OF VERY DEEP, SOMEWHAT POORLY DRAINED SOILS IN RIVER VALLEYS. SURFACE RUNOFF IS NEGLIGABLE TO LOW WITH MODERATE PERMEABILITY. .sgB - CULLEN LOAM - 2%TO 7%SLOPES. SOIL IS VERY DEEP, VERY FINE, AND WELL -DRAINED WITH MODERATE PERMEABILITY. FORMED IN RESIDUUM FROM MIXED MARC AND FELSIC CRYSTALLINE ROCKS. SOIL LOCATED ON UPLAND RIDGETOPS AND SIDE SLOPES OF THE PIEDMONT PLATEAU. 47D - LOUISBURG SANDY LOAM -15% TO 25% SLOPES. SOIL IS VERY DEEP, VERY FINE, AND WELL -DRAINED WITH RAPID PERMEABILITY. FORMED IN MATERIAL WEATHERED FROM FELSIC IGNEOUS AND METAMORPHIC ROCK. SOIL LOCATED ON SUMMITS AND SIDE SLOPES OF THE PIEDMONT UPLANDS. 47E- LOUISBURG SANDY LOAM - 25%TO 4.5% SLOPES. SOIL IS VERY DEEP, VERY FINE, AND WELL -DRAINED WITH RAPID PERMEABILITY. FORMED IN MATERIAL WEATHERED FROM FELSIC IGNEOUS AND METAMORPHIC ROCK. SOIL LOCATED ON SUMMITS AND SIDE SLOPES OFTHE PIEDMONT UPLANDS. EROSION CONTROL NOTES 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 SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VT 625- 02- 00 EROSION ,AND SEDIMENT CONTROL REGULA TIONS 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 TIANES ES-5.-PRIOR TO COMMENCING LAND DISTURBING ACTI VI TIES 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 PLAIN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THEPLAN APPROVING AUTHORITY. ES-7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTI W TIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-8. DURING DEWA TERING OPERA TIONS, WA TER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES-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. EROSION CONTROL NOTES 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 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 ACTIVIITIES 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 BROSION 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. 8. 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 T10 B APPROVED, DESIGNATED BORROW AREA. E TAKEN FROM AN APPR VE R 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FROOTS, STUMPS WOOD RUBBISH AND OTHER ATERIAL N FREE OF R , 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 HOURS OF 7:OOAM TO 9:OOPM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN 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 0 SLIDES, SINKING, OR COLLAIPSE. 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 STABILI7r'1T_ION 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 ANNI04.%L. 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 8OLBS/10OSF. 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 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. 21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION iORDINANCE SECTION 17-204G.) 22. PERMANENT VEGETATION SHALL BE INSTALLED (ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION 17-207B) Paved construction entrance for erosion control plans -% a a� 2n hSs P1f T TGIF g'CtSSOT {]OI .S/��'�� S�.Sa P! y 5r4Hc FO' ii Ft t 9PS��UrtiG:k h";.rkilk,Y PA+n"-D kj,Y r' tJt7 r' ri V691tt 4 . fta�na`rf fJPWt C LFcT�ATFri t iA.r';4� f f r14;,� ELM i^ --t2 Get L511':'v! �tusttnLE f0 .eCl i'd,T alP v �� SECTION A -A Anw' 44946 w--'4 r' fait of I b14 t5nttat Wimlaued 4%ilh o n4uhwkn I WO t+400 r'ht�s}ff valvz gl{tttilyl11,9'+A'dab (14tiFd lYl�t +1 tRatltd5i 4t:1.3 lltli;h�! Tat` a+lzthratr Collatdul pta„'.�tue. 'W,4a11 �+±.tC,xC tttUSt bA cartisd dW�Y I,itltlt dte ar4,Ynop to x11 ;jpt!rokell SCtt111r�.11ed lit! tKUl9YG5t6lWiSi4t. >iIl d{ilnaralt blYall t1C plCl'c7ltitt ltunr altrtiYg atgtui+Laink+. cliiCttea or iFatetcotrisra. PAVED WASH RACK Ritl �Ck. DESCRIPTION OF EROSION tic SEDIMENT CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES: IT IS ANTICIPATED THAT A CONSTRUCTION ENTRANCE, TEMPORARY DIVERSION BERMS, RIGHT OF WAY DIVERSION, A SEDIMENT BASIN, OUTLET PROTECTION, INLET PROTECTION, AND SILT FENCE WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENY SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FORM A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL, DEPEND ON THE TIME OF YEAR APPLIED. 3.01 SAFETY FENCE' - SAFETY FENCE WILL BE INSTALLED AROUND THE PROPOSED SEDIMENT BASIN. 3.02 CONSTRUCTION ENTRANCE - ONE CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT SUNSET AVENUE EXTENDED. THIS WILL BE THE ONLY POINT OF INGRESS AND EGRESS TO THE SITE. CARE WILL BE TAKEN TO PROTECT ADJACENT ROADWAYS FROM TRANSFER OF SEDIMENT. 3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF DISTURBANCE WHERE NOTED ON THE PLANS. 3.07 STORM DRAIN INLET PROTECTION- IP WILL BE INSTALLED ON EACH PROPOSED INLET AS SHOWN ON THE PLANS. 3.09 TEMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND 'THE PERIMETER OF SITE DISTURBANCE WHERE SHOWN ON THE PLANS TO DIRECT RUNOFF TO ON -SITE SEDIMENT CONTROL FACILITIES. 3.14 TEMPORARY SEDIMENT BASIN- TEMPORARY SEDIMENT BASINS WILL BE INSTALLED WHERE SHOWN ON THE PLANS. 3.18 OUTLET PROTECTION- TO BE PROVIDED AT THE OUTFALL OF DRAINAGE PIPES WHERE SHOWN ON PLANS. 3.19 RIPRAP RIPRAP SHALL BE INSTALLED AS OUTLET PROTECTION WHERE SHOWN ON THE PLANS. 3.31 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.32 PERMANENT SEEDING- PERMANENTLY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.38 TREE PRESERVATION AND PROTECTION- TREE PRESERVATION FENCING SHALL BE INSTALLED WHERE SHOWN ON THE PLANS. NO TREES SHALL BE HARMED OUTSIDE 0 THE LIMITS OF TREE PROTECTION FENCING. F C 3.39 DUST CONTROL- DUST CONTROL SHALL BE APPLIED THROUGHOUT THE ,SITE WHERE SHOWN ON THE PLANS. STORMWATER MANAGEMENT: STORMWATER RUNOFF QUANTITY WILL BETREATED QWITH TWO LEVEL I BIORETENTION BASINS WITH DOWNSTREAM DETENTION. SEE STORMWATER MANAGEMENT PLAN SHEETS. MAINTENANCE: IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC i ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS: a.SEDIMENT BASINS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. b.ALL INLET PROTECTION AND GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. c.ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD OR CONTRACTOR ON -SITE. THE CONTRACTOR WILL BE DETERMINED AT THE TIME THE CONTRACT IS AWARDED, IN ADDITION THE DEVELOPER MAY BE CONTACTED. UPON COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE. 1. SET POSTS AND EXCAVATE A 4 "X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS. FLOWl- - 1 L-A"D 1 ,r• ;rjr rsr r rS•i � • ,+ir _• • i•' + ;r •� 0911 rt i �F • 4 EROSION CONTROL NOTES & NARRATIVE PURPOSE: THE PURPOSE OF THIS LAND -DISTURBING ACTIVITY IS TO GRADE THE SITE FOR THE FUTURE PHASE6 DEVELOPMENT IN THE BRIARWOOD SUBDIVISION. THE TOTAL ACREAGE TO BE DISTURBED WITH THIS PLAN IS 3.92 ACRES. EXISTING SITE CONDITIONS: THE EXISTING SITE IS A VACANT, WOODED, HILLY PARCEL. THE SITE IS GENERALLY WELL DRAINED WITH PRESERVED AND MANAGED. STEEP SLOPES. EROSION AND SEDIMENT CONTROL MEASURES HAVE BEEN DESIGNED TO CONFORM TO THE EXISTING SITE SLOPE AND PROTECT THE PERIMETER STREAMS AND ADJACENT PROPERTIES. ADJACENT AREAS: THE SITE IS POSITIONED SOUTH AND EAST OF DICKERSON ROAD AND WEST OF THE EXISTING HUMMINGBIRD LANE SUBDIVISION. IT IS BORDERED BY THE NORTH FORK OF THE RIVANNA RIVER TO THE SOUTH. OFFSITE LAND DISTURBANCE: NO OFF -SITE LAND DISTURBANCE IS PROPOSED. CRITICAL AREAS: MANAGED AND PRESERVED STEEP SLOPES TO BE IMPACTED. STREAMS AND BUFFERS TO BE PROTECTED. WOODLAND PRESERVATION AREAS TO BE MAINTAINED AND PROTECTED WITH TREE PROTECTION FENCING. SOILS: SEE SOILS BOUNDARIES ON THE EROSION AND SEDIMENT CONTROL PLAN SHEET, AND DESCRIPTIONS ON THIS SHEET. SEQUENCE OF CONSTRUCTION: 1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEETING AS REQUIRED. 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. 3. CONTRACTOR SHALL IDENTIFY THE LIMITS OF DISTURBANCE AND INSTALL TREE PROTECTION FENCING WHERE INDICATED ON THE PLANS BEFORE ANY SITE DISTURBANCE SHALL TAKE PLACE. CONTRACTOR SHALL ENSURE THAT TREES TO BE SAVED ARE FLAGGED ALONG THE LIMITS OF CLEARING AND PROTECTED. 4. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH RACK AS SHOWN ON THE PLANS. CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHIALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. INSTALL THE WASH RACK UPHILL FROM THE PROPOSED SEDIMENT BASIN. ACSA WILL DETERMINE THE APPROPRIATE METHOD OF SUPPLYING 'THE WASH RACK. PARKING AND CONSTRUCTION ENTRANCE AREAS SHALL BE CLEARED OF ALL VEGETATION, ROOTS, OR OTHER OBJECTIONABLE MATERIALS BEFORE CONSTRUCTION ROAD STABILIZATION IS INSTALLED. 5. CONTRACTOR DOES NOT HAVE PERMISSION TO CLEAR CUT THE SITE PRIOR TO INSTALLING THE PERIMETER MEASURES AS SHOWN ON THE E&S PLAN. CONTRACTOR SHALL EXPEDITE INSTALLATION OF THE PERIMETER EROSION AND SEDIMENT CONTROL MEASURES AND PROTECT THE SITE WITH THE LEAST AMOUNT OF TREE REMOVAL NECESSARY TO INSTALL THESE MEASURES. INSTALL THE INITIAL CONSTRUCTION MEASURES AS SHOWN ON THE PHASE I EROSION CONTROL PLAN SHEETS. THIS INCLUDES THE SEDIMENT BASINS, SILT FENCE, AND DIVERSION BERMS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, BERMS, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 6. INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN. 7. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE PHASE I EROSION CONTROL PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS. 8. ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE PHASE II EROSION CONTROL PLAN. 9. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED To AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 10. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN CONVERT THE SEDIMENT BASINS TO THE PERMANENT STORMWATER MANAGEMENT FACILITIES. NO E&S ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. 11. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 12. 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. 2. STAPLE WIRE FENCING TO THE POSTS. SIL T FENCE S(WITH WIRESUPPORT) NO SCALE FILTER FABRIC ENTRF,NCHED 6, COMPACTED SOB. F-- 3' MwwuY e DD TEMPORARY 18" DIVERSION BERM 3. A TTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. M�um 4. BACKFILL AND COMPACT THE EXCA VA TED SOIL. FLOW EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SH, SLR ON SSML(L-OW SLOPES, STRIPS NETTIRG-PROTECTIVE COVERINGS TABLE 3.31-B 111 0 ACCEPTABLE TEMPORARY SEEDING PLANT NIATERIALS �� "QUICK REFERENCE FOR ALL REGIONS" Rate SCOTT . COLLINS`Z Planting Dates Species tbs. acre (D FZ U Lic. No. 035791,E Sept. I - Feb. 15 50150 Na of �� I' [t� I I� Annual Rye-grass 0 (Lolium multi-florum) & 50 - 100 IONAL � Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100 ("ilum multi-florum) May 1 - Aug 31 German Millet 50 (Setaria italics) Source: Va. DSWC TOTAL LBS GENERAL SLOPE (3:1 OR LESS) PER ACRE KENTUCKY 31 FESCUE 128 LBS. RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. SEASONAL NURSE CROP 150 LBS FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. OPS PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) FENCING 1 AIWORING r k f � I � ai ago 1 rr'�,,:��� /1 f CORD MICE •rfl• CORRECT 00 CORREc,r TRUNK ARMORING TRIANGULAR:r••D FENCE 'FABLE 3.34<A ADIIESIVES USED FOR DUST CONTROL Water Application Dilution Type of Rate Adhesive (Adhesive: Waterl Nuzzi • llr /Acre Anionic Asphalt Emulsion 7:1 Coarse Spray 1.200 Latex Emulsion 125:1 Fine Spray 235 [twin in Water 4:1 Fine Spray 300 Acrylic Emulsion (Non -Traffic) 7.1 Coarse Spray 450 Acrylic Emulsion (1'raffic) 3,5:1 Coarse Spray 350 Source: Va. DSWC ATTACH FILTER FABRIC TO STAKES OR POSTS & EXTEND IT INTO TRENCI DEN STAKE 'POST 'TH=5'MIN. EXCAVATED 5 BACKFILLEDA COMPACTED SIL T FENCE SF (WITHOUT WIRE SUPPORT) E5-2 NO SCALE MAY BE APPLIED ACROSS BERM THE SLOPE. BRING THERE IS RA HTHE BERM AND ANCHORt BEHIND THE BERM. T: N EL AREA BEFORE BRING MATERIAL DOW TO A LEVEL STEEP TERM/NATI(,VG THE INSTALLATION,, TURN THE END SLOPE UNDER 4 AND STAPLE Al 12 INTERVALS :;,' 12" IN DITCHES APPLY PROTECTIVE COVERING PARALLEL tO .THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL POSSIBLE. ON g5b P SLOPES APPLY PROTEE COVCMNG PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. BIM SOIL STABILIZATION BLANKET NOTE TREATMENT 2 SOIL STABILIZATION MATTING MATERIAL SHALL BE INSTALLED AS NOSCALE REQUESTED BY 7HE ALBEMARLE COUNTY EROSION CONTROL INSPECTOR M N OD . .. .. _ ...,t. �. � . Sediment Basin #1 Design drainage area (acres) 2.86 basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume (cy) 418.00 740.0 0 420.00 1568.0 83.6 422.00 2590.0 236.0 424.00 3747.0 469.4 426.00 5205.0 799.5 wet storage required (cy) (67*DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available volume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> 1') dry storage. dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) tc (min) 2yr 3.70 Q 2yr 1 25yr 6.20 Q 25yr principle spillway: available head (ft) diameter riser (in) spillway capacity, Qp (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) \'SEDIMENT BASIN #2 (PHASE II) , 430 49-0 i 4zo., Sediment Basin #2 (PHASE 11) Design drainage area (acres) 2.12 basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume (cy) 404.00 1140.0 0 406.00 1985.0 114.3 408.00 2942.0 295.6 410.00 3999.0 551.7 wet storage: wet storage required (cy) (67*DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available volume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> 1') dry storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) tc (min) 12yr 4.30 Q 2yr 125yr 7.00 Q 25yr principle spillway available head (ft) diameter riser (in) spillway capacity, Qp (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) Nfl.1•WISPILLWAY CREST OF EMERGENCY 2" 1YITHOUr 5PILLIYAY DESIGNI HIGH WATER ,:(25-'R. SrORM ELEV.) DRY ` STORAGE 'WET ' STORAGE .. R+ .,...... SEGMEtTr CLEANGUr POINT ("T0 WEII CYO ACE R�CEO 142.0 design high water (ft) 406.31 top lof dam (ft) 142.0 top width of dam (ft) 72.1 bottom of basin (ft) 405.24 approx bottom dimensions: 1.1 upstream face slope: downstream face slope: 142.0 baffIles: 407.90 length of flow, L (ft) 144.8 effective width, We (ft) 4.0 L / We (baffles not required if > 2) 6.0 collars:. depth of water at spillway crest (ft) 0.4 slople of upstream face (Z 1) 9.5 slople of barrel (Sb) 3,65 lenglth of barrel in saturated zone (Ls) 5.94 number collars required dimension of collars 2.10 emergency spillway 30 required capacity (Q25-Qp) (cfs) 3,65 bottom width (ft) 42 slope of exist channel (f#fft) 48 minimun length of exit channel (ft) 5.76 crest of spillway (ft) 15 RISER CREST OQ VICE 408.90 410.00 1.0.0 404.0 21'x89' 2:1 3:1 YES 54 56 1.0 YES 3.90 2:1 0,75 % 24.12 2 3.2' x 3.2' YES 2.29 25 15.0 % 10 408.90 191.6 421.42 191.6 97.2 420.16 1.3 191.6 423.50 219.4 4.0 6.0 0.45 13 4.76 7.98 2.50 30 4.76 42 68 9.01 15 IA111.11IN SPILLWAY CREST OF EMERGEt CY T WITHOUT SPILLWAY DESIGN HIGH WATER (25-YR. SIORM ELEY.) Dr,S 10 --____ MIN.. - --... -- RISER CREST ' azr ' STORAGE r °oeec ER' • STORAGE ` e- $EOd.1ENT CLEANOUT POI1IT (' '6ET ' STORAGE REDUCED TO 34 C.Y./ ACRE) design high water (ft) 424.60 top of dam (ft) 426.00 top width of dam (ft) 10.0 bottom of basin (ft) 4%0 approx bottom dimensions: 19'x74' upstream face slope: 2:1 downstream face slope: 3:1 .baffles: NO length of flow, L (ft) 90 effective width, We (ft)) 38 L / We (baffles not regquired if > 2) 2.4 collars: YES depth of water at spilMvay crest (ft) 5,50 slope of upstream face (Z1) 2:1 slope of barrel (Sb) 0.75 % length of barrel in satulrated zone (Ls) 34.02 number collars required 2 dimension of collars 3.7' x 3.7' emergency spillway: YES required capacity (Q245-Qp) (cfs) 3.22 bottom width (ft) 25 slope of exist channel I(ft/ft) 15.0 % minimun length of exit I channel (ft) 10 crest of spillway (ft) 424.50 Sediment Basin #2 (PHASE I) Design drainage area (acres) 434 basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) wlurTe (cy)) 404.00 301,'3.0 0 406.00 4103.0 264.9 408.00 5251.0 610.4 410.00 6508.0 1045.1 wet storage required (cy) (67"DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) availablevolume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> 1') dry storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) to (min) 12yr 4.00 Q 2yr 125yr 6.60 Q 25yr principle spillway: available head (ft) diameter riser (in) spillway capacity, Qp (cfs) diarneter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) 290.8 406.15 290.8 147.6 405.10 11.05 29J0.8 4077.90 3W1,9 4.0 6.0 0).35 111.5 6,08 10.03 2.10 30 63.08 42 48 5.76 I. PROPOSED 25' WIDE GRASS- INED EMERGENCY SPILLWAY'' CREST ELEV-424 50' / � �(' ,; 4t\ � � �,` r ,. tip/ •/�. `� ��\`f\� ; \ \� Xj �,yc X i� + J , %SEDIMENT BASIN#i I I aCP \ \ \ TH o�6 t; o SCOTT R. COLLINS Z U Lic. No. 035791 � to (h N 00 6I2�i o�4sSIONAL ! ' G� z Lur M� Nil. V WI SPILLWAY CREST OF EMERGENCY `- J T WITHOUT SPILLWAY DESIGN HIGH WATER (25-iR. $TORN ELM)IN -'° . -co RISERCRkSr i SED ME T - ASI #2 (P ASE ' ew ' STOWE DEwarERINO � C"CE t _ ('yam^^ .NET ' STORAGE V) E ,,MENT CLEAHOUT POINT / " W'ET " 5TOPKE N 10 34 C.Y./ ACRE) ` 4=0 _.. _ 08. i 40 w W 06 design high water (ft) 408.90 top of dam (ft) 41.0.00 r top width of dam (ft) 10.0 `` - .ppnpncFn RAP I G, w_ bottom of basin (ft) 404.0 approx bottom dimensions: 38'x95' upstream face slope: 2:1 downstream face slope: 3:1 baffles: YES length of flow, L (ft) 67 effective width, We (ft) 77 L / We (baffles not required if > 2) 0.9 collars: YES depth of water at spillway crest (ft) 3.90 j slope of upstream face (Z1) 2:1 slope of barrel (Sb) 0.75 % length of barrel in saturated zone (Ls) 24.12 number collars required 2 dimension of collars 3.2' x 3.2' emergency spillway: YES required capacity (Q25-Qp) (cfs) 3.95 bottom width (ft) 25 slope of exist channel (fVft) 15.0 % minimun length of exit channel (ft) 10 crest of spillway (ft) 408.90 SEDIMENT BASIN BAFFLE DETAIL NO SCALE SHEETS OF 4'x8'x}' EXTERIOR RISER CREST ELEVATION POSTS MIN. SIZE 4" SQUARE OR 5" ROUND. SETAT LEAST 3' INTO THE GROUND El PRE -DEVELOPMENT SCENARIO (5CALL OF 1"=tiLl') DA A & B Existing Impervious Areas (Water Quantity) Existing Residences 3,000 sf j G/TREE LIN /�TYP.),, 8,225 sf Existing Roadways Approved Sidewalk 1,185 sf Approved Lot 33 1,225 sf le 3,635 sf Tc= 0.14 hi�s. 0*1 ob,�o�-b!_F wl, A El FV =IQ E'N E V" - -or 370' CF W LOC�Tlqll,] OF SWM ......... ....... FACIL17 'PR6PO�ED OYTFAlLLINIG TO DAI OOD ��&B'171_ P�AIN CN= 59.9 TU�A4-\ 4 Tc=614 hI*\ h,0 CAION, 0'1� ....... PROPOSED,5* FACILITY L 0 6�- & lb�', 0 F� D P LAI N7,',, I8i 8 FLO ... .... . ... . .. . ........ > ....... 1;7 ............ ... ... .... N LOW III.......... ........... ......... ....... ..... Lr ........... F, 'I ........... Mr-. A R .1... .* . ....... -A� -FXI5TING i6'64F AIN'�TYF`--).*j,.: 1.......... LO(: ...... )PPL ........... .......... IwSTIN5 MA�AkULW-' .................. ........ '.�lllllEXI5T(NG'PRESERVEQ IIIV. 5 U F h .5 (N.Y. 03 ..... . ... STEEP SLOPESffYP.)l .......... . ....... ..... ... MANAGED SLOPES PRESERVED SLOPES ............. .... ........ BEST MANAGEMENT PRACTICE PRESERVATION EASEMENT (SCALE OF 1"=80') 'SED OPEN -SPACE EXI�ThQ'iREE. ROPO PRES�RVATIQN B IfS T EASEMENT. EASEMENT ACTS/AS NAGEMENT PRACTICE & FUTUREqEVELOPMENT,a/ DISTURB�ANCES WITH @ NPT, "41 U ......... . ..... . . . . . . . . . . . . . . . . . . . . . . - - ' - l ..- �-. - , , , - N �,,. � I -�PROPOSED�OPW� A �:EASEMENT.-YASEMENTACT ........... ANA*6'''',E,N..T,!P,R,A,CT*IC*�� A -OPME1INT..'�_.l-.__li .. TIURE-DEVE� ... .. ... ..... . .... ...... L IIU) .. POS D' -PEN �.4 ........... JOIN ... ......... �FJLOCJDPLAIN (.TY 1M I " �Y_ IS;!T ...... ANAGEO.... .... ..... EXIST NG'PRFSERVED� ........ TEEP -SLOPE-5 (TYP.)I'� - .... .... ........... . ...... .... ....... -lPRO OSEDIOPEN S P. .......... �71' IWIT PROPERTY ILINE ... ...... .. ................. ./ ......... ....... PROPQSED OPEN15PACEzI .... T . ...... .. . . . . ...... . ... OINCJQE5 117H PRO). ... .. .... ...... ..... . ..... ...... ......... ..... ......... .......... ... ... ... ............. ........... .... ...... I.. .......... ..... ... ...... ..... ... .. 1PROPOSED OPEN SPACE IL PRESERVATION ... .... EASEMENT COINCIDES It il Ili I Total Onsite Impervious Areas (Water Quality) ............ % PROPERTY LINE Roads 18,150 sf Lots - Proposed 61-76 32,800 sf .......... 8,200 sf Lots- Platted 57-60 \1 ISidewalks 5,050 sf Approved Sidewalk 1,185 sf ,Approved Lot 33 1,225 sf 66,610 sf WATERSHED SUMMARY Pre -Development Post- Deve lo pment CN Area, 1'-jear 2-year CN Area, 1-year 2-year ac. Flo% cfs Flow, cfs � ac. Flow, cfs Flow, cfs 81.3 2.40 0.11 0.11 DA A & B 1 59.9 4.52 2.70 3.26 � 63.9 2.12 0.20 0.88 TFotal= 4.52 0.31 0.99 General Construction notes for Stormwater Management Plans -i. 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 ri5erjoints 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 inspectof. DETENTION BASIN CONSTRUCTION NOTES: FACILITY PLANUNG SPECIFICATIONS: 1. THE DETENTION BASIN SHALL HAVE TURF GROUND COVER, SUCH AS GRASS, MULCH OR SOME OTHER FORM OF A VEGETATIVE GROUNDCOVER. LANDSCAPING BEYOND THIS IS OPTIONAL AND IS NOT REQUIRED. 2. THE PROPOSED SIDE SLOPES OF THE BASIN SHALL BE A MAXIMUM OF 2:1 TO REDUCE THE RISK OF EROSION. THE PROPOSED FLOOR SLOPES SHALL BE GRADED TO PROVIDE POSITIVE DRAINAGE AT ALLTIMES TO THE RISER STRUCTURES. 3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET OF THE PRINCIPAL SPILLWAY STRUCTURE. 4. A VEGETATED BUFFER SHALL BE PROVIDED THAT EXTENDS AT LEAST 25 FEET OUTWARD FROM THE BASIN TOP OF DAM ELEVATION. PERMANENT STRUCTURES (E.G., BUILDINGS, SHEDS, etc.) SHOULD NOT BE CONSTRUCTED WITHIM THE BUFFER AREA. EXISTING TREES SHALL BE PRESERVED IN THE BUFFER AREA DURING CONSTRUCTION IF AT ALL POSSIBLE. 5. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY C'.OMPACTED DURING THE CONSTRUCTION PROCESS, TO ENSURE STABILITY THE DENSITY OF THESE COMPACTED SOILS CAN BE 50 GREAT THAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND, THEREFORE, MAY LEAD TO PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB, PLANTING HOLES SHOULD BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER OF THE ROOTBALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR C(ONTAINER-GROWN STOCK. 6. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS. CONTRACTOR REQUIREMENTS: 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. 2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERYSTOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 1-800-552-7001 BEFORE ANY EXCAVATION). 6. REFER TO THE APPROVED FINAL SITE PLANS FOR ANY DETAILED SITE INIFORMATION. 7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. 8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, STEMS, OR OVERALL SHAPE OF THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE GROWN, 9. ALL PLANT MATERIAL, UNLESS OTHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY, VIGOROUS, AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED. 10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED. 11. PLANTS NOT INSTALLED ON THE DAY OF ARRI VAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALL TIMES BY COVERING THE BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL. 12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE INSPECTOR INITIALLY, AND THEN THE DESIGNER. 13. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER. 14, NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN. 15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOT STOCK. 16. THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR. 17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS. 18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR's CONTROL. FACILITY CONSTRUCTION 1. THE DETENTION BASIN MAY SERVE AS A SEDIMENT BASIN AND/CR TRAP DURING PROJECT CONSTRUCTION. IF THIS 15 DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTI[ON PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION POIND IN MIND. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONV'ERTED INTO AN DETENTION BASIN. 2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE POND IS COMPLETELY STABILIZED. IF THE PROPOSED POND SITE WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THEN THE FACILITY WILL BE DEWATERED, DREDGED AND RE -GRADED TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. 3. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE BASIN THAT ARE GRADED OR DENUDED DURING CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS, NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL STABILIZATION. 4. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE DURING THE ESC PHASE. 5. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) DURING THE ESC PHASE TO ENSURE THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION. 6. THE CONTRACTOR SHALL THEN CONSTRUCT THE EMBANKMENT AND ANY INTERNAL BERMS IN 8 TO 12-INCH LIFTS AND COMPACT THE LIFTS WITH APPROPRIATE EQUIPMENT. 7. UPON COMPLETION OF THE EMBANKMENT GRADING, THE CONTRACT -OR SHALL EXCAVATE/GRADE UNTILTHE APPROPRIATE ELEVATION AND DESIRED CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN. 8. CONTRACTOR SHALL THEN CONSTRUCTTHE EMERGENCY SPILLWAY INI CUT OR STRUCTURALLY STABILIZED SOILS. 9. THE CONTRACTOR SHALL THEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION. 10. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW. 11. THE CONTRACTOR SHALL THEN INSTALLTHE APPROPRIATE BASIN LAN DSCAPING IN ACCORDANCE WITH THE APPROVED PLANS. STORMWATER MANAGEMENT NARRATIVE: THE PROPOSED PLAN PROVIDES STORMWATER TREATMENT FOR THE CONSTRUCTION OF BRIARWOOD's LOTS 57-76 (UNDER SEPARATE REVIEW). THIS VSMP PLAN ADHERES TO PART IIB REQUIREMENTS FROM A STORMWATER MANAGEMENT STANDPOINT. THE SUBMITTAL PACKAGE DOCUMENTS ASSOCIATED WITH THIS PLAN SHOW WATER QUALITY COMPLIANCE BEING MET THROUGH THE BEST MANAGEMENT PRACTICE OF OPEN SPACE PRESERVATION. THIS PLAN ALSO COMPLIES WITH PART IIB COMPLIANCE BY THE ATTENUATION OF FLOWS IN THE DETENTION BASIN. PLEASE SEETHE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR FULL DETAILS OF THE PLAN's COMPLIANCE. FACILITY NIAINTENANCE: MAINTENANCE OF THE DETENTION BASIN IS DRIVEN 3Y ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1 . MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN, 2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. 4. INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEG;RITY. 5. INSPECT BASIN OUTFALL CHANNEL FOR EROSION, UNDERCUTT-ING, RIP -RAP DISPLACEMENT, WOODY GROWTH, etc. 6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 7. INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES. B. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. 9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING. 10. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY. FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICAL TO ENSURE THE BASIN(s) ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACDOR WITH THE ENGINEER AND INSPECTOR DURING THE FOLLOWING STAGES OF THE DETENTION BASIN's CONSTRUCTION PROCESS: 1. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATION/GRADING (e.g., INTERIM/FINAL ELEVATIONS) 4. EXTENDED DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS) 5. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPilLLWAY, AND THE OUTLET STRUCTURE(s). 6. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING) 7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) StormRax-111 ROUND SERIES TRASH RACK CONCRETE MMKOLE STANDARD 60 INCH RACK SHOWN DIMEN$JOINS IN INCHrz$ A PLAN $I DE VIEW sturmRaXTM Round Series for Concrete Manhute Part No. Drm A Dim a Olin C MInID Min OD 11S-24 17A 14 Y4 28 24 30 M-36 21 Y4 :14 4Pj 16 21 Y, 19 54 _T 51 a�,60 27% 0% 6o 7o Pla,stlicSoltitions. Inc. CUSTO14ER PO, B..43ffi, WS.Itr, VA 22604 ?44 MrQkc F4, ftKb,*V;9, YA ZZIM -5-127 Phone -CT- A11) 871 FROlf 41-40", ;1111 1540) 722-2219 W I- HE)PE 5RiUC? UHAL PLASflr5Y PLAMC W_%U7lCfl5. INC, QL4%RTER MC110N ­7 RLMWAII--FORACCESS ISOMETRIC CONCRETE ZTKVGTURE PIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILAaLr: OPTIONS GIR088 OR&GING FOR OVERMNG HDPE ANTI-VQRTEA PLATE DAM DMVfN BY - AP" Ft off& A TH 0 SCOTT COLLINSZ Lic. No. 035791,�- 116 k,p- % k� I I � Aj J I UKIvIVVAI tK MAIINAULIvItIN I t-AI.ILl I Y 'A' Ut I AIL (SLALL Ur 1"=3U') ./PROPOSED BA SIN f 00 'HALL"HAVE PQSITIVE•SLQPFS- � COUNTY DEFINED PRESERVED TO THE= I S r FI S i /� / IRIS SLOPES TO REMAIN 0, / % UNDISTURBED (TYP.) P / /' f/ ORIFICE IN L LOC TIONS 9� /./.j. / - PROPOSEDVVAR WIDTH.SW�ACCos I - \ � . �. �1 / ✓ / �.M{jINTENANCE JSM /. . PROPOSED z5' WIDE GRASS' ,f / / \ \ /LINE�EN��RGENCYSPILLW&Y/ CRESTS EVATI N,04,�6r -(29 TQP OF'DA ELEV. , 426.00 V. /r5 TFiiSSHE ALD PROFI E (TYR.Y/ / xp lx PROPOSED`s M\�"'MD)F� \ \ :� � 1 , l ` • , • �/ � I +00;. `�!` � � `~GRADED SWjvl•GRASS,,\ e\ \ \ � LINED ACC&SS ReA\D. \ \ /"/ r / / I \ �` 2 �1 = ,• / PROPOSED 030" CL. III RCP STANDPIPE w/ \ \ \ / Q ' �' / • / l �' \ \'���y' ! TRASHRACKS SHALL SERVE AS THE RISER \ // � � + •, .\ • `\ ' ',-, \ STRUCTURE. RISER STRUCTURE RIMAl • � \ \ \ ELEV.=423.50' w/ ONE (1) 01.5" LOW -FLOW ORIFICE w/ INVERT ELEV. 418.00. \ CO�REVENT FLOTATJON THRRIS . ASE \ � PROP SED f015"CL ill RCR, \ / , �, i p \ • ' • AND B.A�RREL..CONNECTIQN SHAELB- BARREL VDOl ,STD. EyV= �� FIRMLYvEMBEDDED 6".INTO A REINFORC] .."_ % INV. IN=f�i6.00; INV 011 =415r49�}' �. A V \ <` `i8' T�IICK CQNCRETE FOUNDAT(4LTHAT. �. \ IS _, X. ANp-IS.BURJED BELOW THE LIMITS .- :- —. �'y / ' ��>•,- 5. S � _OF- E BASII`rGRA ING / ?�, o ' `\, \. :\ \ \ . \. \ \ \, I .I _ _ . 1. t _ _- i' . PROPOSED VD'OT• 3 COARSE A�GREGAT� OL).TLET \ \P \ Y �_ - ✓ =PROTECTION w% GEOTEXT(LE FILTER FABRIC, \ \' . / . ' ' .UNDERLAYMENT•((= • 0. bo \N _- 0 1/2" xiwi vht�d hook attached with .1;/8' fas ever h /fi �Jll Istsrrl4.Lric ' J£ �t/'I' HDF-tE pldLv, (©ptioskat) g, 1, O.1 -1,/1i hulca acid 1/ e. plal ���} rlvtu€ions [no. or equal 00010 .,c;3y� nT ✓v,'�;,C 5.91ei1aq rilil, KipLsottul plate Yfa,fi��y}ti� c� HI).pf� LnIgAurid pi A.al,c. with IlQleo and I,'i" plate C'G 11011 diiat_utuekutad iig Ylsstiu oluLlanz; hnc or equal ^'5 6 aJiq hrlw 0 rs fin, _y 00 O in�1E .BLIP 7 ! PLAC)`I'M p 0 B*x L F Cj C fi F 3i I TfTIi I S VA _904 . INC. arr-a`/`/-F 72 t 1 EMBANKMENT NOTES: AFTER AN INVESTIGATION OF THE SITE's SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN EXAMINATION OF VA DEQAPPENDIX A: EARTHEN EMBANKMENT (REQUIREMENTS vs. RECOMMENDATIONS), THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES NOT NEED A GEOTECHNICAL STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGNS PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW, MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS AT A MINIMUM. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON THIS SHEET. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, -ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS. STORMWATER MANAGEMENT FACILITY 'B' DETAIL (SCALE OF 1"=30') 4 8, BW / 440' T `- 4 2'BW 4 2 \ 432TW zTW 44 \ \ \ \ \ \\ 24 6W ' 36BVJ/ X \ 5( /f433 4�9' TVA ski "� 43BW 4�9BW }n PROPOSED 1o' WIDE mylx / ` ' \ \ \ \ • GRADED SWM GRASS ' ".� - . LINED ACCESS ROAD \ PROP'OSED"fd oCL..II RCP. 3 � \, ,STAN PIP`,W/TRfiSHRACKSSHALL ' SER� AS.TH5F RISER,STR�JGTUj2E. RISER STRUCTURE RIM ELEV.-4W-60 w/ONE (ij 0? ;LOW�--FLOW .ORI ICE " e- c� ' O+qQO w/INV RT E EV.= oy.00� . /� \ `�: \ t 4 4� TW / fE / / \ 1+O 0 42 4 TW 6' TW ' 'T B f o> - r W i � 43 ED-" 4 R rfOPOS VAR. .6•� - � B � 44 - F % .. ID W _"ACC S .- / � ,' —_ iR _ / ]]---- i N E.E . t0 P OPOS D. ASIN FLO R PTACt�H E MAINTENA C SMT�. ~ . . . \/ 1, .I ' . ! % r S� . . . . - \Y EST THERISER's I QSITIV SLOP O E' P P O OS D ID GRASS LI ED I T RISER BASE AND R W � TO PREVENT FLOTATION THE PROPOSED l21Z5", CL, III RCP. � � �5 I N e / � r BARREL CONNECTION SHALL BE FIRMLY EMBEDDED BARREL w/ VDOT STD.�EW.11+2 EMERGIrN�Y SPI4LWAfC( C(ZEST /LO F OyV ORI IC�'IN ALL LOCATPNS 6" INTO A REINFORCED 18" THICK CONCRETE ,.5 ELEV TIO. 08. o i / . (48LF; INV: IN=4o3_:So, INV. -. '' I �. i H 4. 9 / FOUNDATION THAT IS x AND IS BURIED BELOW TOP OFIDAM ELEV' , �10,00 5' S'� OUT=4o3,14) ( I f - 4 THE LIMITS OF THE BASIN GRADING. -- 4 yy PROPOSED VDOT #3 COARSE AGGREGATE STORMWATER MANAGEMENT BASIN B NOTES: y O�/ OUTLET PROTECTION w/ GEOTEXTILE FILTER p 1. THE REVIEW, PROPOSAL &INSTALLATION OF THE RETAINING '_. _-„- v FABRIC UNDERLAYMENT (L=12', W=6', D=2' MIN.) /' �.� N'` .� ( ,z /- ' /• •/ WALL ARE NOT PART OF THIS SET OF PLANS. THE RETAINING 7• f ! ,� WALL DESIGN WILL BE REVIEWED SEPARATELY. / ./ ./ r• / / '� 435 435 \ PR POSED P 30" DPIPE w CL. III RCP STA � TR SHRACK SHALL �ERVE AS HE RISE 430 TRUCTU E. RISERISTRUCTQRE RIM 430 r ELE�.=4z3.50 w/ ONE (�) r01.5" LOW-FLO PROPOSED BA�IN FLOOI ORIFICE W/ INVE ELEV.=4 8.00. SHALL AVE POSITIVE SLgI E I PROPOSED 25' WIDE GRASS TO TH -RISER s OW-Cl n%ni__... _. .._.. .... ............ .......... ._.. ------.. ORIFI E IN ALL ! OCA 425 I 420 -------- - - -- --- - — PROPOPE GRA FLOOR ELEV 4�5 1 — I---- I L:_i-- TO PREIVENT FL TATION HE RISEq BASE AND PARREL ONNECTJON SHALL BE FIRMLY _MBEDD D 6 INT REINFORCED A 18" THIC < CONCRETE FOUNDATION THAT IE THAT x 5 5, ND IS B RIED BELOW THE 4 10 OFTHE I ASIN GR DING. � P W W O M n O W W m lD 00o0 4 W L�1 o+o0 0+50 SWM FACILITY A SUMMARY Elevation, ft. Area of Contour, sf Volume, cf 418 740 0 420 1,568 2,257 422 2,590 6,372 424 3,747 12,674 426 5,025 21,415 LINED EMERGENCY SPILLWAY CREST ELEVATION=4z4•5o' 425 (1o' TOP OF DAM ELEV. = 426.00') r-CONTRACTOR SHALL I STALL HE EMBf NKMENT INACC RDANCEIw/THE DETAI L S. �k.NOT ES;S H O W N ON HIS SHE T. 420 430 430 PROPOSED VDOT #3 COP AGGREGATE OUTLET PROTECTION w/GEOTEXT FILTER FABRIC UNDERLAYN (L=10', W=5', D=2' MIN. 415 / GRADE PROPOSED BASIN SPIL SLOPES SHALL BE 4:1 C --_--_-_ _. TO PROVIDE ASN 'PROF (015" CL. III RCP BA RR L VEHICULAR TRANSITII w/ VDOT STQ. EW-1 ( 8LF, INV. THE ACCESS ROAD & T I = 16.00' NV.OUT- 1 . 4 10 THE GRASS LINED SI 4 4 ) � l r 4 5 9 rn °� Lfl N N N 1+00 1+50 1+75 SWM FACILITY A SECTION RSE EXISTIN LE -- GRADE _..__._. _ ....._I_... ENT 425 425 v .WAY SIDE 11 25 R FLATTER OOTH _._-.---.--_PROPOS IN ALONG GRAD PROTEC ILLWAY. 420 420 W W O 00 l0 00 W W t^j l6 N lD i _t' W LEI 0+50 PROFILE SCALES 1"=5' (V) 1"=5o' (H) SECTION A-9: TYPICAL GRXPHICAL DETAILS ,. --Homogeneous fill T Min --Cut off trerl0 4 below uitioble I rraateri�i S4 or rock TYPICAL ROMQQENEQUS EMBANKMENT Perforetd v FOUNDATION DRAIN. �raiit af9d, g`' cn 9t l�7111 CHIMNEY DRAIN TrimitBorl fill -Rock or gre'rel `-Elanket drain BLANKET DRAIN f 4 4r grQwl j Tr9raitlon filter TOE DRAIN Sourco: SCE" Erigi leo inn F' etcd A-lanuol Figure A-Ia. Holt€!og+'neorrsE11d1bmikFtiems ml.5Wpage Controls BASINS A & B NOTES: 1. SEE DETAIL ON PREVIOUS SHEET FOR RISER TRASHRACK/FRAME & COVER. z. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAIL ON THIS SHEET, OR EQUIVALENT, FOR ORIFICE TRASHRACK DETAIL. 3. A REINFORCED CONCRETE FOUNDATION SHALL BE INSTALLED ON THE RISERS AS SHOWN & SHALL MEET THE MINIMUM SPECIFICATIONS SET FORTH IN THE VESCH SPEC. 414, 420 4zo ROPOSED SVi/ACE DIRECTING RI'NOFF 415 ' / I INTO THE B SIN EGRADE 410 PROPOSED PROPOSED BASIN FLOOR SHALL HAVE POSITIVE SLOPES TO THE RISER's LOW -FLOW _...._" I ____.. .. _ ORIFICE IN ALL LOCATIONS N 405-------- --- 0.5-2%MA,' TO PREVENT FLOTATION THE RISER BASE HALLBE AND BARREL CONNECTIONS FIRMLY EMBEDDED 6"INTO A REINFORCED - - 18" THICK CONCRETE FOUNDATION THAT IS 5' x 5', AND IS BURIED BELOW THE LIMITS OF THE BASIN GRADING. w W m n �O O W LU W LLB-. SWM FACILITY A SPILLWAY 0+50 SWM FACILITY B SUMMARY Elevation, Area of Volume, cf ft. Contour, Sf 404 76 0 406 531 539 408 1,116 2,150 410 1 1,804 1 5,042 PROPOSED 030" CL. III RCIP STANDPIPE w/ TRASHRACKS SHALL SERVE AS THE RISER 415 STRUCTURE. RISER STRUCTURE RIM ELEV,=407,90' w/ ONE (1) 02" LOW -FLOW ORIFICE w/ INVERT ELEV.=404,00. PROPOSED 25' WIDE GRASS LINED EMERGENCY SPILLWAY CREST ELEVATION=408,90' 41O (1o' TOP OF DAM ELEV. = 410.00, 415 CONTRACTOR SHALL INSTALL THE EMBANKMENT IN ACCORDANCE w/THE DETAILS & NOTES SHOWN ON THIS SHEET. 405 PROPOSED 015" CL. III RCP BARREL w/ VDOT STD. EW-1(48LF, INV, IN=403•50', INV. OUT=403.14') PROPOSED BASIN SPILLWAY SIDE SI SHALL BE 4:1 OR FLATTER TO PROV SMOOT H VEHICULAR TRANSITION P 00 THE ACCESS ROAD & TO PROTECT GRASS LINED SPILLWAY. PROPOSED VDOT #3 COARSE m O AGGREGATE OUTLET off co p PROTECTION w/ GEOTEXTIL.E FILTER FABRIC UNDERLAYMENT (L=12', W=6', D=2' MIN.) 1+00 1+25 SWM FACILITY B SECTION 415 EXISTIN GRADE 410 I 410 JPES ---------- z 5 - - ..-....... DE A _ONG rHE 405 1 405 W W n J J W Wri N WLLi 0+50 'ROPOSED GRADE SWM FACILITY B SPILLWAY SCOTT . COLLINS`� Lic. No. 035791,E �SSjONAL E�01