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WPO201200096 Plan - Approved 2012-12-17
r I TABLE 4 - OPEN SPACE, • COMPARISON, WITH APPROVED REZONING E L IE[)EP4.E PliA!SE II WPO PLAN RIO MAGISTERIAL DISTRICT, ALBE-MARLE COUNTY1 VIRGINIA B�LVEDERE HASE 11 M A Ya �.. � - , 1 i LOTAo i �� _-.-. ._...._.__.. -_ I i I I . j I i -•� LOT 161 LOT 176 LOT 177 1 LOT a78 i LOT ,79 1 1 WT I& 79 LO)Ta8o ` I 1t{ LOTa59 i LOT 175 I I ;I I LOT x62 _ BLOCK7 I I' � LOT 246 _ I I 1 LOT 1.74 I I I 1 \ LOT 158 LOT 263 LOT 147 - - - LOT a73 LOT 257 LOT 1.64 LOT 148 -- - I T1. \ \ - C) LOTa65 _ - - -- -' \ ^ LOT 256 p - - Lore GRIPPE PARK LOT 249 _ LOT 166 _ LOT 155 _ - ' •` �\ \. �\ - - /"i _A - - LOT 17o 1 LOT 15o - - �1 LOTa67 ¢9 LOT 254 - -- �n _ _ --- LOT 169 1 LOT 252 LOT 153 LOT 15= swarm ws�w rrrmm� w+ ' \ BLOCK 5 _.:.r._ :_.. ...,. DAB)NEY PARK F ARR W '�' �" BLOCK 9 'I LOT 196 LOT 194 > i;":;`y` �:f;;''.t �'• i5 1 I �.,; 7 LOT 193 ^••y 'i 1� u' +t,� •;Y \.C: ' I . a +r LOT 191 LOT 19z 5 ' it s `� �'� t x 1 ='E•s;' • .:, .,. _ ...:. .. .., I LOT 190 w s sws LOT 189 LOT 188 .� LOT 287 \I I l 1 I I c �yt7 ",'.4`'•. "y _ ^ - LOT 186 \1 ,� - ,'•"i V:'s'K'y';�.a'y;M1.;..r 1.J„. - - / LOT 82 LOT 183 I LOT 1834 I i I 1 DUNLORA SUBDIVISI APPROVED WITH REZON NG DEVELOPER: STONEHAUS DEVELOPMENT, LLC PROPOSED WITH PHASE II 1.21 COMMENTS 100 10th ST. NE, SUITE 301 NOTE: ALL OPEN SPACE TO BE OWNED AND MAINTAINED BY THE BELVEDERE HOMEOWNERS ASSOCIATION. Block Conservation Area CHARLOTTESVILLE, VA 22902 E Oth r Green Space 434.974.7588 Conservation Area Preseriation Area OWNER: TMP 06200 -00- 00-00300 Conservation Area s Other Green Space DB 3488, PG 552 1 Preservation Area Other Green Space Park or Green Space BELVEDERE STATION LAND TRUST (Acres) (Acres) 2421 IVY ROAD DB /PG (Acres) CHARLOTTESVILLE, VA 22903 (Acres) (Acres) TMP 06200 -00 -00 -00500 (Acres) DB 3488, PG 552 (Acres) (Acres) Park'A' BELVEDERE STATION LAND TRUST i 2.3 VDO STANDARD , PROPOSED PAVEMENT T- ,,.. T STOP SIGN 2421 IVY ROAD CHARLOTTESVILLE, VA 22903 r--- ;F -� EC -3A DITCH - - EXI S77NG CONTOUR ' i TMP 06100 -00 -00 -16000 Not yet platted DB 3488, PG 552 #' Block 1 BELVEDERE STATION LAND TRUST EC -2 DITCH 240.55 PROPOSED SPOT ELEVATION -- 2421 IVY ROAD ' cn .� - 78C DEN07ES TOP /BACK OF CURB CHARLOTTESVILLE, VA 22903 Z LLI H Uj °. ENGINEER: COLLINS ENGINEERING 2 w Open Space Block 2 200 GARRETT STREET, SUITE K 1.2 O CHARLOTTESVILLE, VA 22902 ' CONTACT: SCOTT COLLINS, PE I Z i. 434.293.3719 ' m TAX PARCEL #: 06100- 00 -00- 16000, 06200- 00 -00- 00300, 06200 -00 -00 -00500 { U) LU Block 2, Commons and 2 ., TOTAL ACREAGE: 06100- 00- 00- 16000(PORTION): 11.24 AC. 0.7 � 06200- 00-00- 00300: 1.43 AC. t .wr o z 06200- 00 -00- 00500: 2.45 AC. # " Lin TOTAL: 15.12 AC. r 3 H aLLI r? ` ZONING: NMD PER ZMA# 07 -04 w/ BELVEDERE COD APPROIVAL ON JANUARY 5, 2010 0 (ACCOMPANIED BY APPROVED VARIATION REQUESTS DATED 2 -3 -2010 & r � 3 -24- 2011) Not yet platted NOTE: THIS PLAN INCLUDES PORTIONS OF BLOCKS 5, 7 AND 9 FROM THE APPROVED REZONING PLAN. THE REMAINDER OF BLOCK 5 WAS PLATTED WITH - -BELVEDERE PHASE 1. THE REMAINDER OF BLOCKS 7 AND 9 WILL BE PLATTED WITH FUTURE PHASES. Block 2 oper PROPOSED USE: RESIDENTIAL Block2 Open Space Including 51 SINGLE FAMILY DETACHED LOTS AND 24 -36 CARRIAGE UNITS = 75 -87 UNITS TOTAL Belvedere Blvd plat DEVELOPMENT DENSITY: MIN: 74 DU / 15.12 AC. = 4.89 DUA �. MAX: 87 DU / 15.12 AC. = 5.75 DUA SUBDIVISION STREETS: CURB &GUTTER I ce platted thus far is 0.92 ac. PARKING: FOR BLOCKS 5 & 7, PARKING ON LOTS AVAILABLE IN GARAGES AND DRIVEWAYS SHALL BE SWM #3 ACCESSED VIA ALLEYS. FOR BLOCK 9, PARKING IN GARAGES AND DRIVEWAYS S TALL BE `4.22 ACCESSED FROM THE STREET. ON- STREET PARKING IS AVAILABLE AS SHOWN O� SHEET 3, AND " - SHEET 6. below rezoning SOURCE OF BOUNDARY SURVEY: 0.00 -0.92 WW ASSOCIATES ALTA/ ACSM LAND TITLE SURVEY OF BELVEDERE STATION LANE TRUST LLC DATED FEBRUARY 6, 2006 Belvedere PH 1 plat SOURCE OF TOPOGRAPHY: • VIRGINIA RESOURCE MAPPING platting complete. AERIAL SURVEY DATED DECEMBER 22, 2005 (SITE WAS FIELD VERIFIED ON OCTOBER 24, 2012) 3 0.48 DATUM: ELEVATIONS BASED ON NAD '83. r FLOODPLAIN INFORMATION: ` 1'44 THIS PROPERTY IS LOCATED OUTSIDE OF THE FLOODPLAIN LIMITS AS SHOWN 014 THE FLOOD r zoning by 0.96 ac. 0.00 INSURANCE RATE MAP, MAP NUMBER 51003CO279D, EFFECTIVE DATE FEBRUARY, 2005. 0.96 STREAM BUFFERS: THERE ARE NO STREAM BUFFERS WITHIN THE LIMITS OF THE PROJECT AREA WATERSHED: I UPPER RIVANNA RIVER WATERSHED. THIS PROPERTY IS NOT LOCATED IN A Belvedere Blvd plat WATER SUPPLY PROTECTION AREA. EXISTING VEGETATION: CLEARED, SLOPING PARCEL WITH GRASS COVER STREET TREES: STREEET TREES TO BE PROVIDED ALONG PUBLIC ROADS IN ACCORDANCE 4 WITH THE CODE OF DEVELOPMENT AND COUNTY REQUIREMENTS. - ACCESS: THIS DEVELOPMENT WILL ACCESS EXISTING PUBIIC ROADS LOCATED TO THE SO�TH VIA PUBLIC DB 35143 PG 225 & ROADS AND PRIVATE ALLEYWAYS. CURB AND GU1(TER AND STORM SEWER SYSTEMS WILL CONVEY DRAINAGE WITHIN THIS DEVELOPMENT. ALL PROPOSED ROADS SHALL �E PUBLIC. PHASING: PHASE 1; BLOCKS 5 & 9 i PHASE II: BLOCK 7 . J BUILDING SITES: i LOTS 146 -196 AND THE RESIDUE'OF 06100- 00 -00- 16000, 06200- 00 -00- 00300, ,¢ 1.4 Belvedere PH 1 plat 06200 -00 -00 -00500 EACH CONTAIN A BUILDING SITE THAT COMPLIES WITH SECT ION 4.2.1 OF THE ALBEMARLE COUNTY ZONING ORDINANCE. CONSERVATION PLAN: A CONSERVATION PLAN SHALL BE REQUIRED WITH FINAL ROAD PLANS. ! platted. Open space platted CEMETERIES: NO BURIAL SITES WERE FOUND DURING FIELD SURVEY OF THE SITE. DB 3545 PG 54 UTILITIES: ACSA SEWER & WATER ARE PROPOSED & EXIST OINSITE. IMPERVIOU REAS ' exceeds rezoning by 0.32 ac. ROADS & ALLEYS: 2.62 AC. 0.00 032 SIDEWALKS: 0.54 AC. LOTS: 1.96 AC. TOTAL 5.12 AC. r I TABLE 4 - OPEN SPACE, • COMPARISON, WITH APPROVED REZONING E L IE[)EP4.E PliA!SE II WPO PLAN RIO MAGISTERIAL DISTRICT, ALBE-MARLE COUNTY1 VIRGINIA B�LVEDERE HASE 11 M A Ya �.. � - , 1 i LOTAo i �� _-.-. ._...._.__.. -_ I i I I . j I i -•� LOT 161 LOT 176 LOT 177 1 LOT a78 i LOT ,79 1 1 WT I& 79 LO)Ta8o ` I 1t{ LOTa59 i LOT 175 I I ;I I LOT x62 _ BLOCK7 I I' � LOT 246 _ I I 1 LOT 1.74 I I I 1 \ LOT 158 LOT 263 LOT 147 - - - LOT a73 LOT 257 LOT 1.64 LOT 148 -- - I T1. \ \ - C) LOTa65 _ - - -- -' \ ^ LOT 256 p - - Lore GRIPPE PARK LOT 249 _ LOT 166 _ LOT 155 _ - ' •` �\ \. �\ - - /"i _A - - LOT 17o 1 LOT 15o - - �1 LOTa67 ¢9 LOT 254 - -- �n _ _ --- LOT 169 1 LOT 252 LOT 153 LOT 15= swarm ws�w rrrmm� w+ ' \ BLOCK 5 _.:.r._ :_.. ...,. DAB)NEY PARK F ARR W '�' �" BLOCK 9 'I LOT 196 LOT 194 > i;":;`y` �:f;;''.t �'• i5 1 I �.,; 7 LOT 193 ^••y 'i 1� u' +t,� •;Y \.C: ' I . a +r LOT 191 LOT 19z 5 ' it s `� �'� t x 1 ='E•s;' • .:, .,. _ ...:. .. .., I LOT 190 w s sws LOT 189 LOT 188 .� LOT 287 \I I l 1 I I c �yt7 ",'.4`'•. "y _ ^ - LOT 186 \1 ,� - ,'•"i V:'s'K'y';�.a'y;M1.;..r 1.J„. - - / LOT 82 LOT 183 I LOT 1834 I i I 1 DUNLORA SUBDIVISI APPROVED WITH REZON NG PLATTED V TOTAL GREEN SPACE (AC) 0.53 0.75 3.26 PROPOSED WITH PHASE II 1.21 COMMENTS DIFFERENCE FROM REZONING NOTE: ALL OPEN SPACE TO BE OWNED AND MAINTAINED BY THE BELVEDERE HOMEOWNERS ASSOCIATION. Block Conservation Area Preservation Area Oth r Green Space WITH THIS PLAN. THE REMAINDER OF BLOCKS 7 & 9 WILL Conservation Area Preseriation Area 0th r Green Space Conservation Area Preservation Area Other Green Space Conservation Area Preservation Area Other Green Space Park or Green Space Location (Acres) (Acres) (Acres) DB /PG (Acres) r (Icres) (Acres) (Acres) (Acres) (Acres) (Acres ) (Acres) (Acres) Park'A' 1 2.3 VDO STANDARD , PROPOSED PAVEMENT T- ,,.. T STOP SIGN ce r--- ;F -� EC -3A DITCH - - EXI S77NG CONTOUR ' Not yet platted Block 1 1 EC -2 DITCH 240.55 PROPOSED SPOT ELEVATION -- 0.4 `n H cn .� - 78C DEN07ES TOP /BACK OF CURB i Z LLI H Uj DEPTH OF EC -2 DITCH TAB DENOTES TOP OF BOX Not yet platted J 2 w Open Space Block 2 1&2 1.2 O 5 I Z i. m Z Not yet platted U) LU Block 2, Commons and 2 ., 0.7 � I , o z Q ce ce Lin H aLLI r? Greenwa y w H 0 � Z Not yet platted Block 2 oper space remains to be platted. Block2 Open Space Including 3 Belvedere Blvd plat �. 3.30 Total opens ce platted thus far is 0.92 ac. SWM #3 `4.22 DB 3543 PG 225 below rezoning 1 0.00 0.00 -0.92 Belvedere PH 1 plat platting complete. Open space platted exceeds SWM #4 3 0.48 IDS 3545 PG 54 1'44 r zoning by 0.96 ac. 0.00 0.00 0.96 Belvedere Blvd plat DB 35143 PG 225 & Open space a northern corner pocket parks Village Green 4 1.4 Belvedere PH 1 plat 1'72 remains to be platted. Open space platted DB 3545 PG 54 exceeds rezoning by 0.32 ac. 0.00 0.00 032 Belvedere Blvd plat Platted open pace includes roundabout and Roundabout #2 Corner Pocket DB 3543 PG 225 & pocket parks. No open space remains to be Parks 4 1.2 Belvedere PH 1 plat 4 0'70 platted. Total open space platted is 0.5 ac. less DB 3545 PG 54 than rezoning. 0.00 0.00 -0.50 Park'E' 5 0.6 I 0.53 Proposed 0.00 0.00 -0.07 Belvedere PH 1 plat platting complete. Open space platted is 1.08 'Linear Park 'F' 6 4.12 3. 04 D8 3545 PG 54 { ac less than rezoning, 0.00 0.00 -1.08 I .. Park'G' 7 1.9 ( 0.75 Proposed 0.00 0.00 -1.15 Park'H' 8 0.2 I Not yet platted Proposed - note a portion of block 9 remains to Open Space Block 9 9 033 1.2 0.5 � 0.37 1.96 iii be platted -0.73 -0.83 1.46 ~ Proposed - notj a portion of block 9 remains to Block 9, Preservation Easement 9 0.07 0.63 i 0.09 0.84 be platted 0.02 0.21 0.00 Linear Park 'J' 9 & 10 1 5.35 I Not yet platted Open Space Block 10 10 3.51 4.59 I Not yet platted Linear Pafk'K° 10 0.8 I Not yet platted Park'L' i0 OS (> iVot yes piaiied Park'M" 10 0.2 l Not yet platted Rivanna River Bottomiand 10 41.85 _' Not yet platted 83.65 Acres Total TOTAL 53.81 Acres 7.62 Acres 2 .22 Acres Green 10.20 0.09 1.21 3.24 -0.71 -0.62 -0.98 Space or 40% of Site ^ I SHEE'i' LAYOUT scnLe: r" = ioo' GREEN SPACE/ OPEN SPACE PROPOSED: CONSERVATION AREA(AC) BLOCK 5: 0 BLOCK 7: 0 BLOCK 9: 0.09 PRESERVATION AREA(AC) 0 0 1.21 OPEN SPACE(AC) 0.53 0.75 1.96 TOTAL GREEN SPACE (AC) 0.53 0.75 3.26 TOTAL 0.09 1.21 3.24 4.54 NOTE: ALL OPEN SPACE TO BE OWNED AND MAINTAINED BY THE BELVEDERE HOMEOWNERS ASSOCIATION. LEGEND NOTE: PORTIONS OF BLOCKS 5, 7 AN.D 9 ARE INCLUDED ILLI WITH THIS PLAN. THE REMAINDER OF BLOCKS 7 & 9 WILL EXISTING CULVERT EARTH DITCH BE PLATTED ON A FUTURE PLAN. THE REMAINDER OF CULVERT DRIVEWAY CULVERT BI ClrV W PI _T1 TI En WITH PHASE 1 TPF . PP -0-FPVATinN AND CONSERVATION AREAS SHOWN WITHIN BLOCK 9 ON THE 0 DROP INLET & STRUCTURE NO. - BENCH, MARK REZONING PLAN WILL BE PROVIDED WHEN THE REMAINDER OF BLOCK 9 IS PLATTED. CURB i 1 YI ♦1 ,t t� PROJECT LOCATION 14e; 19 SCOTT R. COLLINS . LIc. No. 03579-1 IdIVAI. g,� Z 0 a U w a Z 0 f r C 4 r� VJ LEGEND O ILLI EXISTING CULVERT EARTH DITCH CULVERT DRIVEWAY CULVERT (1=4 `� 0 DROP INLET & STRUCTURE NO. - BENCH, MARK CURB CLEARING LIMITS' 177777 -` -� CURB &GUTTER ± 01 ; .. LsJ �/ VDO STANDARD , PROPOSED PAVEMENT T- ,,.. T STOP SIGN ce r--- ;F -� EC -3A DITCH - - EXI S77NG CONTOUR ' » DEPTH OF EC -3A DITCH 200 PROPOSED CONTOUR EC -2 DITCH 240.55 PROPOSED SPOT ELEVATION -- `n H cn .� - 78C DEN07ES TOP /BACK OF CURB Z LLI H Uj DEPTH OF EC -2 DITCH TAB DENOTES TOP OF BOX Zo J 2 w a O Z i. m Z U) LU :D ., � o z Q ce ce Lin H aLLI r? w H 0 4 Z f 1 EROSION & SEDIMENT CONTROL NOTES & DETAILS 2 w EROSION & SEDIMENT CONTROL PHASE I PLAN 3 a EROSION & SEDIMENT CONTROL PHASE II PLAN 4 ° N STORMWATER MANAGEMENT PLAN & COMPUTATIONS 5 TOTAL SHEETS 5 Aw CO N M .I4 0 N Z LAM N AV a. t 6 LL CL J Uj CYO :1 J' • ,. �,- a §..,: Q w ° {..L. 0. v z CL V N v LAMI �Z LU oFr Z 1 "e 'W �w APPROVED ® Z by the Albeme0a.- County W Community Development Department ' ' �' W W g Ul a T3atE `� " - t ° h Pile t j e o G. U a O l`'+ c) l t(1 m c o w O wv W y ry �y// � N Ldp a a . x L / C s i° I 0 O o �3 Z C IJ. w tt W q 11 Z c Q Z° w� v r n z �, C) U ` U 11 N C i 0 ° o C a� J � C H X 0 ul W "N w mo _ 0 1 CL o iOn NO APPROVALS � I��TE � 12059 T�6PA1<rM9NC OF COMMUNITY DEVEI.f?1?MENT - PLANNER/ZONINO I NOINEEIZ . ........ ............................... ...... SCALE o IN _8PE= AS NOTED U Alta T DIH 4 T yIENT OF AkE k8SCUE ° ALBEMARLECOLNTY rSEI VICE`AUTH T NO. G1 'F, ANSPO]KTATION H o 4IR()INIA:3EA A a o REAt�R D aPAR"1 TENT 1 o . s » �3 LEGEND EROSION & SEDIMENT CONTROL EROSION CONTROL NOTES DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL NOTES & NARRATIVE r EASURES. �j rT �r CONTROL M ROADS MEASURES: • E5 -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND PURPOSE.' L BE CONSTRUCTED AND MAINTAINED ACCORDING SEDIMENT CONTROL PRACTICES WlL ION AND SEDIMENT ON7ROL MEASURES £ OS S ND- i TU BING AC WTY IS O CREATE A SIDE L HOUSING DEVELOPMENT SHALL E IN ACCORDANCE WITH THE EROS 1N PURPOSE OF 7Nl LA D S R Tl T RE N77A HODS DE PME T THAT IS 4l?THIN AND SEDIMENT CONTROL PRACTICES HAL B T �` EXISTING CULVERT STRUCTURAL EROSION N TO MINIMUM STANDARDS AND SPECIFICA71ONS OF THE VIRGINIA EROSION AND -1 E E S PLANNED COMMUNITY. ROAD, OT GRADING, 77L1 AND 0 T I_.._ __._ �.._ � 774 BELVEDERE MASTER NE C MM R L GRA G U TIES ST RMWATFR MANAGEMENT ARE tIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN 77415 SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625 -02 -00 EROSION IT IS ANTICIPATED 774E USE OF A CONSTRUCTION ENTRANCE, DIVERSION DIKES, SEDIMENT > CULVERT SECTION CONSIST OF THE FOLLOWING: AND SEDIMENT CONTROL REGULA7ONS. BASINS AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY PROPOSED WITH THIS PLAN TO ACCOMMODATE THE DEVELOPMENT. THE TOTAL ACREAGE TO BE DISTURBED IS 20.59 E5 -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE ACRES AND CLEARING IS PROPOSED. SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. DROP INLET &STRUCTURE N0. 3.01 SAFETY FENCE, PRE- CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF EXISTING S17E CONDI77ONS: Af A PR07EC17VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO LAND DISTURBING AC77WTY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED THE EXISTING S17E IS A VACANT HILLY PARCEL, SLOPING FROM NORTH WEST TOWARDS SOUTH EAST. THE SITE IS CURB PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS GENERALLY WELL DRAINED AND EROSION AND SEDIMENT CONTROL MEASURES HAVE BEEN DESIGNED TO CONFORM TO THE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE AS THE FIRST STEP IN CLEARING. SHALL BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VF COVER. EXISTING S17E SLOPE AND PROTECT 7HE DOWNSTREAM AND ADJACENT PROPERTIES CURB & GUTTER OF POTENT7AL ACCESS BY THE PUBLIC. ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE PERMANENT SEEDING WiLL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE ADJACENT AREAS' MAINTAINED M THE SIT£ AT ALL TIMES EXCAVATED AND WHERE CONSTRUCTION AC77VI77ES HAVE CEASED. PERMANENT SEEDING SHALL THE S17F IS BORDERED BY THE EXIS77NG DUNLORA DEVELOPMENT TO THE SOUTH EAST, EXIS77NG BELVEDERE PHASE / TO ���� PROPOSED PAVEMENT 3.02 CONS7RUCTTQN ENTRANCE.* ,ES-5.-PRIOR TO COMMENCING LAND DISTURBING AC77W77ES IN AREAS OTHER THAN A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMI7ED TO, OFF -S17E BORROW ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR THE SOUTH WEST, THE FUTURE, BUT CURRENTLY VACANT, BELVEDERE BLOCK 4 TO THE NORTH WEST AND A VACANT EC -3A DITCH VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE TO REDUCE THE AMOUNT OF MUD OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. WOODED AREA TO THE NORTH. TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONS7RUC77ON CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT OFFS 17E• LAND D ISTURBANCE.' i _ EN7RANGES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT APPROVING AUTHORITY. THIS PROJECT PROPOSES NO OFFSITE DISTURBANCES OTHER THAN THE CONNEC77ON TO EXISTING ACSA SEWER. ANY DEPTH OF EC 3A DITCH DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST 6" 7RANSPORTED ONTO PUBLIC ROADWAYS. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR iNSTALLA77ON OF ANY A00177ONAL EROSION OFFSI7E PROPERTY USED FOR CUT DISPOSAL OR FILL ACQUIS177ON MUST HAVE AN APPROVED EROSION AND SEDIMENT CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS GERMINA77NG VEGETA77ON IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF CONTROL PLAN. - -- -- - - - EC -2 DITCH 3.05 SILT FENCE: DETERMINED BY THE PLAN APPROVING AUTHORITY. SEED MIXTURE KILL DEPEND ON 7HE 77ME OF YEAR APPLIED. CRI77CAL AREAS: A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYN7HE77C FILTER FABRIC STRETCHED ACROSS ES- 7.•ALL DIS77JRBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CON7R'OL MEASURES ,, �; , ... x �>V CRI77CAL SLOPES ON -SITE CONSISTS OF MANMADE AND NATURAL SLOPES. A POR77ON OF THESES SLOPES WILL BE AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AT ALL 77MES DURING LAND DISTURBING AC77W77ES AND DURING S17E' DEVELOPMENT 6 DEPTH OF EC -2 DITCH 3 01= SAFETY FENCE y`` °SAFETY- FENCE,.wLL�'BE / NSTALLED AROUND 'PROPOSED SEDIMENT `' DISTURBED NTH THIS WPO PLAN. AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSIRUC770N OPERATIONS IN ORDER TO UN77L FINAL STABILlZA770N IS ACHIEVED. - _ - :- PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED .BASINS SAND- PO7EN77AL FIELD= FL7TED SEDIMENT 7 /IeS - -r �• SOILS: EARTH DITCH LOW -TO- MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN WATER FILTERING DEVICE. 3.02 CONSMUC77ON ENTRANCE - ONE CONSTRUCTION ENTRANCE IS PROPOSED' °AND IT THIS S17E CONSISTS OF SEVERAL SOIL TYPES SEE THIS SHEET FOR FURTHER DETAILS. DRIVEWAY CULVERT SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY SHALL BE INSTALLED AT THE END OF THE PAVEMENT ON FARROW DRIVE ENTERING THE SITE SEQUENCE OF CONS7RUC770N: INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN AND AFTER EACH RUNOFF - PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS T S 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS7RUC770N MEE77NG AS REQUIRED. OR CLEANUP TO MAINTAIN THE EFFECT71/ENESS OF THE EROSION CONTROL DEVICES THIS LOCAT70N WILL BE THE ONLY POINT OF INGRESS AND EGRESS O THE SITE, UNLESS BENCH MARK ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 2. NO EROSION ;CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL s, SHALL BE MADE IMMEDIATELY. 07HERKISE AUTHORIZED BY THE COUNTY INSPECTOR. CARE SHALL BE TAKEN TO PR07ECT ALL FROM THE INSPECTOR ON THE PROJECT. 3.07 STORM DRAIN INLET PROTECTION: IS77NG ROADS & ALLEYS FROM TRANSFER OF SEDIMENT. J. CONTRACTOR SHALL INSTALL SEDIMENT BASINS BEFORE ANY S17E DISTURBANCE SHALL TAKE PLACE. CONTRACTOR - ® _ - ® CLEARING LIMITS A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR RO I CONTROL NOTES 3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF DISTURBANCE SHALL INSTALL FENCING AROUND THE BASINS & SHALL STAKE THE LIMITS OF DISTURBANCE ON -SITS CONSTRUC77ON CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO �� °"' ON t✓ as STANDARD STOP S/GN PERMANENT STAB/L/ZA770N OF 7NE DISTURBED AREA. INLET PROTECTION APPLIES WHERE STORM General construction notes for Erosion and Sediment Control plans WHERE NOTED ON THE PLANS OUTSIDE OF THE LIMITS OF DISTURBANCE /S PROHIBITED. = VDOT DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF 774E 2. The plan approving authority must be notified one week prior to the pre - construction conference, one 3 07 STORM DRAIN INLET PR07FC7ION- IP WILL BE INSTALLED ON EACH PROPOSED INLET AND 4. INSTALL PAVED CONS7RUC710N ENTRANCE WITH WASH AREA AS SHOWN ON 774E PLANS THE CONS7RUC710N NEIGHBORING EXISTING INLETS AS SHOWN ON THE PLANS ENTRANCE SMALL BE INSTALLED WHERE CONSMUCRON VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, - - - - 200- -- - - EXISTING CONTOUR CORRESPONDING DISTURBED DRAINAGE AREA. 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 o minimum 3.09 TEMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND 7HE PERIMETER PROVISIONS SHALL BE MADE TO M/NiM/ZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO 17/E PAVED 9 SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD" SHALL BE CLEANED 3.09 TEMPORARY DIVERSION DIKE. P g g THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM 774E ROADS BY SHOVELING OR zQ0] - -- PROPOSED CONTOUR BASE standards ands ecifications of the Vir inia Erosion and Sediment Control Handbook and Vir inia OF S/TF DISTURBANCE WHERE SHOWN ON THE PLANS TO DIRECT RUNOFF TO ON -SITE -�� A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR 8. ,SE OF A SLOPING Regulations VR 6z -02 -oo Erosion and Sediment Control Regulations. SEDIMENT CONTROL FACILITIES SWEEPING AND 7RANSPOR77NG TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM g 5 g 240.55 PROPOSED SPOT ELEVA 77ON UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. 3.14 TEMPORARY SEDIMENT BASIN - TEMPORARY SEDIMENT BASINS WILL BE INSTALLED AND ONLY AFTER SEDIMENT IS REMOVED iN THIS MANNER. RUNOFF FROM A DISTURBED AREA TO A SEDIMENT - ]RAPPING FACILITY SUCH AS A . A co of approved erosion and sediment control Ian shall be maintained on the site at all times. MAINTAINED WHERE SHOWN ON 774E PLANS 5. INSTALL THE (REMAINING IN177AL CONSTRUCTION MEASURES AS SHOWN ON THE PHASE J EROSION CON7ROL PLAN f 78C DEN07FS TOP /BACK OF CURB SEDIMENT-LADEN 4 PY PP p THiS INCLUDES 7HE INSTALLA17ON OF THE PERIMETER DIVERSION DIKES, INLET PR07EC77ONS AND SILT FENCE. T/B DENOTES TOP OF BOX SEDIMENT TRAP OR SEDIMENT BAS /N. USE WHEREVER STORMWA7E'R RUNOFF MUST BE TEMPORARILY 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but 3.18 OUTLET PR07FC77pN- TO BE PROVIDED AT THE OUTFACE OF DRAINAGE PIPES WHERE SHEET. DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING not limited to, off -site borrow or waste areas), the contractor shall submit a supplementary erosion control SHOWN ON PLANS. ALSO INSTALL A TEMPORARY WATER METER TO SUPPLY WA7ER ,TO THE WASH RACK FROM THE EXIS77NG BLOW -OFF CONS7RUC77ON. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, Ian to the owner for review and approval b the Ian approving authority. ASSEMBLY, AFTER CONTAC77NG ACSA. THE CONS7RUC7ION OF THIS LINE SHOULD OCCUR IMMEDIATELY AFTER THE PP 9 Y _ � VIRGINIA EROSION &SEDIMENT CONTROL iM -71CH CAN BE PROLONGED WI7N PROPER MA7NTFNANCE. p pp y P 3.19 RIPRAP RIPRAP SHALL BE INSTALLED AS OUTLET PR07EC170N WHERE SHOWN ON THE CON5IRUCTiO/W OF SEDIMENT BASIN #1 AND THE CONS7RUC770N ENTRANCE. MEASURES INTENDED TO TRAP SEDIMENT EROSION CONTROL HANDBOOK SPECIFICA77ON NUMBER 6. The contractor is responsible for installation of any additional erosion control measures necessary to PLANS. RIPRAP IS ALSO PROPOSED AT SPECIFIC LOCATIONS NOTED ON 7HE PLANS. SHALL BE CONSTRUCTED AS A FIRST STEP W17N ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNC'1i'ONAL * 3.11 TEMPORARY RIGHT -OF -WAY DIVERSION: prevent erosion and sedimentation as determined by the plan approving 3.31 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. S78 I I I I I T-1 STRAW BAiL BARRIER 3.04 A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED authority. 6. IN ADD177ON TO ENSURING THAT 7HE PAVED CONS7RUC7ION ENTRANCE IS INSTALLED, INSTALL ANY REMAINING PLANS. -- E Wl7Hl A SLOPING EROSION TROL ITEMS AS SHOWN ON E PHASE i EROSION CONTROL L O RIGHTS OF WAY AND SIMILAR SLOPING AREAS TO SHORTEN 774E FLOW LENGTH N T. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing RO5 CON W/V 7N ! CO 1R L P AN. RIGHT -OF -WAY, THEREBY REDUCING THE EROSION POTENTIAL BY DIVER77NG STORM RUNOFF TO A activities and durin site develo meat until final stabilization is achieved. 3.32 PERMANENT SEEDING- PERMANENT SEEDING SHALL BE APPLIED WHERE SHOWN ON THE 7 ONCE ALL THE EROSION CONTROL i7EMS HAVE BEEN INSTALLED AS SHOWN ON THE PHASE I EROSION CONTROL PLAN QDD TEMPORARY DIVERS /ON DIKE J. STABILIZED OUTLET. GENERALLY, EARTHEN DIVERS IONS ARE APPLICABLE WHERE THERE WILL BE g paring dewatering operations water will be pumped into an approved filtering device. PLANS, AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING_ LITTLE OR NO CONSTRUCTION TRAFFIC MTHIN 7HE RIGHT -OF -WAY. GRAVEL STRUCTURES ARE MORE S ABL O BLANKETS AND - B SHALL B EMPLOYED WHEREVER OPERA77ONS. RI - ACCOMMODATE VEHICULAR TRAFFIC. 9• The contractor shall inspect all erosion control measures periodically and after each runoff producing 3.36 0/L ST i IZA77 N BLA KE S MATTING /M H F APPLICABLE TO ROADS AND 07HER RIGHTS-OF-WAY WHICH CC C 8. PERMANENT OR TEMPORARY SOIL STABILIZA7ON SHALL BE APPLIED TO DENUDED AREAS WTHIN SEVEN DAYS AFTER ST &S� TEMPORARY SEDIMENT TRAP 3.13 rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices SHOWN ON THE PLANS OR WHERE SLOPES EXCEED J. 1 SLOPE. O J. 13 TEMPORARY SEDIMENT TRAP: shall be made immediately. 3 FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN 39 DUST CONTROL- DUST CONTROL SHALL 8E APPLIED THROUGHOUT THE SITE WHERE SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UND/S77/RBEO) SB CD SEDIMENT BASIN 3.14 A TEMPORARY POND /NG AREA FORMED BY CONSIRUC77NG AN EARTHEN EMBANKMENT WITH A STONE 1o• All fill material to be taken from an approved, designated borrow area. SHOWN ON THE PLANS FOR LONGER THAN 30 DAYS. PERMANENT STABILIZA7ION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO 22. All waste materials shall be taken to an approved waste area. Earth fill shall be inert materials only, free DORMANT FOR MORE THAN ONE YEAR. CONTRACTOR SHALL KEEP THE CONSIRUC770N ENTRANCE w/ WASH RACK 1. ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DI5TURB�D AREAS WHERE THE of roots, stumps, wood, rubbish, and other debris. STORMWATER MANAGEMENT. OPERATIONAL AS LONG AS POSSIBLE. 7HE DIVERSIONS, SiLT FENCING &SEDIMENT TRAP SHALL ALSO REMAIN IN IP INLET PROTEC77ON 3 07 TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEJIMENT TRAP WILL BE 12. Borrow or waste areas are to be reclaimed within days of completion per Zoning Ordinance section USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONS7RUCTED EITHER INDEPENDENTLY OR IN T Y P P g STORMWATER RUNOFF WILL BE TREATED 010 DETAINED ON -SITE THROUGH THE USE PLACE AS LONG AS POSSIBLE AND SHALL ONLY BE REMOVED UPON THE COUNTY INSPECTOR's APPROVAL, THE CONJUNCTION K17H A TEMPORARY DIVERSION DIKE. 5.1.28• SEDIMENT BASINS SHALL REMAIN IN PLACE UN77L UPLAND AREAS ARE STABILIZED. SEDIMENT BASIN #1B SHALL SF �F- -�--�F SIL T FENCE 3.05 OF A TYPE l!1 RETE'N770N BASIN. THIS STORMWA 1E•R MANAGEMENT FACILITY IS g 13. All inert materials shall be transported in compliance with section 23 -301 of the Codle of Albemarle. RETMIN OPERATION UN71L FARROW ROAD AND ITS STORM SEWER HAVE BEEN GRADED AND INSTALLED TO DIVERT` E 3.18 OUTLET PROTFC770N: 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of DESIGNED TO TREAT & DETAIN RUNOFF FROM THE PROPOSED DEVELOPMENT AND UPLAND DRAINAGE TO SEDIMENT BASIN #1A. ONLY UPON APPROVAL FROM THE COUNTY INSPECTOR SHALL ANY I STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING t',�V!CES PLACED AT THE T:ooam to 9:oopm. FUTURE DEVELOPMENT IMMEDIA7EZY UPLAND OF THE PROJECT. SEE STORMWA TER SEDIMENT BASIN BE- REMOVED. , CE CONSTRUC770N ENTRANCE 3.02 OUTLETS OF PIPES OR PAVED CHANNEL SEC717ONS. TO PREVENT SCOUR AT , 6,?MWATER OUTLETS, g i i of nn r h "main in I I r r r MANAGEMENT PLAN BY COLLINS ENGINEEfi'lNG FOR ADDITTONAL DETAILS 9. THE PROPOSED RETAINING WALL BEHIND LOTS 184 -190 SHALL BE CONSTRUCTED AFTER SEDIMENT BASIN #1B H:`S O 25. orrow, fill or waste activity ty shall be conducted n a s e ma eta to s atera support, o o de TO PROTECT 7HE OUTLET STRUCTURE, AND TO MINIMIZE THE POTENTIAL FOR 019?, NSMEAM EROSION BEEN REMOVED, BUT PRIOR TO UPLAND LOT GRADING. THE RETAINING WALL SHALL ACT AS A SEDIMENT TRAPPIdG BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWA7FR FLOWS APPLICABLE TO to minimize any hazard a persons, physical damage to adjacent land and improvements, and damage to 774E OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS any public street because o slides, sinking, or collapse. MAINTENANCE DEVICE WHILE LOT GRADING OCCURS CD ® CHECK DAM 3.20 10. INSTALL THE INITIAL C0NS7RUC110N MEASURES AS SHOWN ON 7NE PHASE 1/ EROS /ON CONTROL PLAN SHEETS. 26. The developer shall reserve the right to install, maintain, remove or convert to permanent stormwater IN GENERAL, DURING CONSTRUCTION THE RLD - OR CONTRACTOR ON -SITE WILL CHECK ALL INSTALL INLET PR07E'C77ON AS SHOWN ON THE PLAN N7H THE UTILITY AND STORM SEWER CONSTRUC770N. MEASURES 3.19 RIPRAP: management facilities where applicable all erosion control measures required by this plan regardless of the EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. INTENDED TO 7RAP SEDIMENT SHALL BE CONS7RUCTED AS A FIRST STEP iM77•/ ANY LAND DISTURBANCE AC77WN AND FD TEMPORARY FILL DIVERSION 3.10 A PERMANENT, EROSION - RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WI7H FILTER sale of any lot, unit, building or other portion of the property. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC ATTEN77ON WILL SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. O FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE EROSIVE FORCES OF g BE GIVEN TO THE FOLLOWING 17EMS. 2T. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75 Ibs /acre, and in 11. INSTALL THE CURB AND GUTTER AND PAVEMENT ASSOCIATED WITH THE ROADS AND ALLEYS CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE a. SEDIMENT BASINS AND /OR MAPS WILL BE CLEANED AND MAINTAINED iN ACCORDANCE 12. INSTALL THE SANITARY SEWER. the months of September to February to consist a 50150 mix of Annual Ryegrass and Cereal Winter Rye, or POTENTIAL FOR INRLMARON, AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND OR WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. DV - , - �- D /VERSION 3.12 / i March d April o consist of Annual Rye, or May through August to consist of German Millet. Straw 13. INSTALL ANY REMAINING EROS /ON CONTROL ITEMS AS SHOWN ON THE PHASE // EROS /ON CONTROL PLAN. O NON- COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, n Ma c an p t s y , y g g b. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PHASES OF CO TRU N E COMPLETE; STABILIZED ' b applied a I s 3.00sf. Alternatives are subject to approved b the Count erosion control 14 ONCE ALL PH NS CT70 AR PLE THE S /1F IS TAB/L/ ED AND THE INSPECTOR HAS GIVEN WATER TURBULENCE AND VELOCITY, EXPECTED VEGETA77VE COVER, ETC., ARE SUCH THAT THE SOIL mulch Is to a pplle t8o b / ) pp y y PREVENT PROPER DRAINAGE. IF THE GRAVEL I5 CLOGGED BY SEDIMENT, THE GRAVEL WILL APPROVAL, THIE CONTRACTOR CAN REMOVE THE EROSION CONTROL MEASURES, INCLUDING SEDIMENT BASINS #2;& #3. MAY ERODE UNDER 7HE DESIGN FLOW COND177ONS inspector. BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. PS PS PERMANENT SEEDING 3.32 c. ALL SILT FENCE BARRIERS tMLL BE CHECKED REGULARLY FOR UNDERMINING OR NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GiVES PERMISSION. O 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch., Agricultural grade 15. MAINTAIN ALL EROS /ON CONTROL MEASURES AS SPECIE /ED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL 3.31 TEMPORARY SEEDING. limestone shall be a lied at olbs /l000sf incor orated into the to 6 inches of soil. (Fertilizer shall be DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING W7H PP 9 P P4 REMOVED WHEN THE LEVEL OF SED IMENT DEPOS I TION REACHED HALF WAY TO 774E TOP OF HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADM /N /STRATOR IN ACCORDANCE WITH THE a TO TOPSOIL/NG 3.30 applied at 2000lbs /acre and consist of a io -2o -�o nutrient mix. Permanent seeding shall be applied at 774E BARRIER. VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. APPROPRIATE RAPIDLY GROWING .ANNUAL PLANTS. TO REDUCE EROSION AND S£DIMENTAIOD F 18olbs /acre and consist of 95% Kentucky 31 or Tall Fescue and o -5% Perennial Ryegrass or Kentucky d. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS 16. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL S 17E STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF Bluegrass. Straw mulch is to be applied at 8olbs /loosf. Alternatives are subject to approved b the Count MAINTAINED. AREAS SHOULD BE FER77LIZED AND RESEEDED AS NEEDED. STABILIZA7ION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR g PP ) PP Y Y B 774E LOCAL PROGRAM ADMlN1S7RATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTlN FROM E CIP CULVERT INLET PROTECTION 3.08 OFF -SITE AREAS, AND TO PROVIDE PROTEC710N TO BARE SO /LS EXPOSED DURING CONSTRUC770N erosion control inspector. _ IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL E THE RLD OR A G F 7N - CONTRACTOR WILL BE DETERMINED AT THE TIME 774E CON ACT DIS OSl O OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO RE FURTHER EROSION o UN77L PERMANENT VEGETA77ON OR OTHER EROSION CON7ROL MEASURES CAN BE ESTABLISHED. 1g. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging CONTRACTOR ON -SITE THE 7R R 7R P T7 N R PREVENT RTHE ROS N ANC IS AWARDED. UPON COMPLE77ON OF THE PROJECT; THE OWNER WILL BE RESPONSIBLE FOR SEDIMEN TA 770N. ................... ...... -.... ........ to structural measures is to be repair immediately. Silt traps are to be cleaned when 5o% of the wet storage S17E MAINTENANCE. 3.32 PERMANENT STAB/L/ZA770N: volume is filled with sediment. All seeded areas are to be reseeded when necessary to achieve a good stand TecFinica(Bultetin.7 Minimum Standard 3..02 OC DC ► DUST CONTROL 3.39 rY 9 `- THE ESTABLISHMENT OF PERENNIAL VEGETA711/E COVER ON DISTURBED AREAS BY PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY of grass. Silt fence and diversion dykes which are collecting sediment to half their height must be cleaned and repaired immediate) SOIL DESCRIPTION STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, P Y• TSD TEMPORARY SLOPE DRAIN 3.15 AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WRDLIFE 20, All temporary erosion and sediment control measures are to be removed within 3o ;days of final site 2C - Albemarle fine sandy loam 7% to 159 slopes. This soil is well drained & typically has O HABITAT. TO ENHANCE NATURAL BEAUTY. (UPON COMPLE77ON OF CONS7RUC770N AC77W77ES, ALL stabilization, when measures are no longer needed, subject to approval by the County erosion control a moderately high Ksat value with a depth to water table more than 80 Inches. The AREAS WILL RECEIVE A PERMANENT VEGETA7,7VE COVER. inspector. available water capacity for this soil is typically low. The surface layer is generally 0 -5 8 SA �? SAFETY FENCE 3.01 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water inches thick without a risk of frequent flooding and ponding. .3.36 SOIL STABILIZATION BLANKETS & MATTING: Protection Ordinance section 17- 204G.) 20CJ - Cullen clay loam- 7% to 15% slopes. This soil is well drained & typically has a very 774E INSTALLA77ON OF A PR07EC77VE COVERING (BLANKET) OR A SOIL STABIL17_A77ON MAT ON A 22, permanent vegetation shall be installed on all denuded areas within nine (9) months after the date the low to moderately high Ksat value with a depth to water table more than 80 inches. The PREPARED PLAN77NG AREA OF A STEEP SLOPE, CHANNEL OR SHORELINE. TO AID IN CONTROLLING available water capacity for this soil is typically moderate. The surface layer is generally �,�� TEMPORARY RIGHT -OF -WAY 3.11 EROS /ON ON CRI77CAL AREAS BY PROVIDING �A MICROCUMATF WHICH PROTECTS YOUNG VEGETA77ON land disturbing activity commenced. (Water Protection Ordinance section 17- 2o7B) 0 -8 inches thick without a risk of frequent flooding and ponding. DIVERSION AND PROU07ES ITS ESTABLISHMENT. APPLIES ON SHORT, STEEP SLOPES WHERE EROSION HAZARD IS HIGH AND PLANTING IS LIKELY TO BE TOO SLOW IN PROVIDING ADEQUATE PR07EC77VE COVER. 28 - Albemarle fine sandy loam- 2% to 79' slopes. This soil is well drained &typically has a moderately high Ksat value with a depth to water table more than 80 inches. The 3.39 DUST CONTROL: available water capacity for this soil is typically low. The surface layer is generally 0 -5 REDUCING SURFACE AND AIR MOVEMENT OF ,DUST DURING LAND DISTURBING, DEMOL177ON AND 2"x4" WOODEN FRAME DROP INLET inches thick without a risk of frequent flooding and ponding. CONS7RUC77ON AC77W77ES. TO PREVENT SURFACE AND AIR MOVEMENT OF DJST FROM EXPOSED WITH GRATE 22CJ - Culpeper clay loam- 7% to 15% slopes. This soil is well drained & typically has a SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT very low to high Ksot value with a depth to water table more than 80 inches. The ALBBAARLC COUNTY HEAL 7H HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL , ' FRAME available water capacity for this soil is typically moderate. The surface layer is generally 1.5 MAX. 0 -8 inches thick without a risk of frequent flooding and ondin MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING = " 9 9 P 9• CONSTRUCTION ENTRANCE �___ CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE IN/774 THE VESCH. '\. 19B - Cullen loam- 2% to 7% slopes. This so7l is well drained & typically has a very low to sHAEE orrECrs rtow TOTAL LBS high Ksat value with a depth to water table more than 80 inches. The available water TO SEDWNT WIN GENERAL SLOPE (3:1 OR LESS) PER ACRE - capacity for this salt is typically moderate. the surface layer is generally 0 -8 inches thick 70' MIN' without a risk of frequent flooding and ponding. r � -zA Asrtv>_T TOP coin KENTUCKY 31 FESCUE 128 CBS. q 9 P 9• 2x-" PAVEMENi RED TOP GRASS 2 LBS. �_ -Z� ' ,3' / '' ^-7 21B - Culpeper fine sandy loam- 2X to 7% slopes. This soil is wel0- drained &typically has SEASONAL NURSE CROP 20 LBS. ,--/ a very low to high Ksat value with a depth to water table more than 80 inches. The . VA ' ' 21A 150 LBS available water capacity for this soil is typically moderate. The surface layer is generally DIVERSION DiTCH SIDE ELEVATfON AGGREGATE WE SEASONAL NURSE CROP GAINER 0 -8 inches thick without a risk of frequent flooding and ponding. Is11NG FEBRUARY 16 THROUGH APRIL ANNUAL RYE �� EXCESS 39D - Hazel loam- 159 to 25% slopes. This soil is excessive/ drained & typically has a ROUND AT CORNERS P y J8 y MAY 1 THROUGH AUGUST 15 FO ANN MILLET _�� - �- �� moderately high to high Ksat value with a depth to water table more than 80 inches. The 70' MIN. AUGUST 16 THROUGH OCTOBER ANNUAL RYE available water capacity for this soil is typically low. The surface layer is generally 0 -10 EX. CURB OR A%IMT PACED WSHRACK EDGE OF PAV'T NOVEMBER THROUGH FEBRUARY 15 WINTER RYE inches thick without a risk of frequent flooding and ponding. NOTES: PERSPECTIVE VIEWS Reference: web soil survey online database, found at 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL STAKE �-- Http : / /webso7 /survey.Nres.Usda.Gov /app /webso7lsurvey.Aspx __T\ 12' MIN. TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32.-, - 2%- °-� PAVEMENT 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION __� � OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. FABRIC \ MINIMUM DDHCAT PERMANENT SEEDING SCHEDULE /// // , DESIGN WATER NO SCALE /- \1\ \.\ \.\ , _ \��\ . ^ ".° '� rLAN vlrw (STD. &SPEC. 3.32 OF VIRGINIA EROSION & P s � % / /�% /, \ % / ^/Y /11 \ % / / \% j \ j `/' 4 ' INGRESS MEN FULL opEIiDAAON SEDIMENT CONTROL HANDBOOK, 3RD ED.) \ \i \ \ \� \\ \ \ /� \ \j // /MIN., D :� HYDRANT WITH FROST \ \�� \� : ' \ \ \/ \ 72' MIN ABOVE GRADE AND 4' PLANTING DATES SPECIES RATE -- _ _ // . ./ ��I% � I OFF EDGE OF PAVEMENT. LBS I.CRE _ _ \ / 50/50 MIX OF ( / ) ANNUAL RYEGRASS ELEVA TION OF STAKE AND SECTION A -A SEPT 1 -FEB 15 (LOLIUM MULTI- FLORUM) 50 - +00 FABRIC ORIENTATION NOTE: A MINIMUM WATER TRAP OF 1" is REQUIRED CEREAL (WINTER) RYE WITtt A MINIMUM WASH HOSE DIA OF 1.5' (SECALE CEREALE) SIL T FENCE 5 PAVED TEMP' CONST ElV7R ANNUAL RYEGRASS 60 -100 S DROP INLET PROTECTION 3.07 -1 FEB 16 APR 20 NO SCALE 9 SC4E N.T.S. f; I (�LODUM -MULTI - FLORUM) k --�• GERMAN MILLET 11 MAY 1 -AUG 31 (SEi•ARIA ITALICA) 50 6' SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY :SUMMER MONTHS SHALL BE ATTACH FILTER FABRIC MULCHED IMMEDIATELY UPON COMPLETION OF SEED TO STAKES OR POSTS & APPLICATION WITH TACIKIFIED STRAW, IN ACCORDANCE EXTEND iT INTO TRENCH WITH VA E &S STD 3.35. WOODEN STAKE TEMPORARY SEEDING SCHEDULE STEEL POST NO SCALE LENGTH = 5' MIN. (STD. & SPEC. 3.31 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) TSB EXCA VA TED SOIL BACKFILLED AND COMPACTED 4'x4" TRENCH J SIL T FENCE sF (WITHOUT WIRE SUPPORT) 3.05 - 2 NO SCALE . SET POSTS AND EXCA VA TE A 4 "X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS Anionic . I __I- I trwa ��,� I I FLOW col w 2. STAPLE WIRE FENCING TO THE POSTS. SILT FENCE sF (WITH WIRE SUPPORT) NO SCALE DD TEMPORARY DIVERSION J. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND JT INTO THE TRENCH. ../ cI8" es%we : (ridhesi% `Water) 1. jf,.4, DAUQ11VA . 30 Anionic . as a4 1A8 AspiiovEniulsinn. 7.1 Coarse Spra}+ 1,200 Latex Emulsion 12411 Finns Spray 235' Resin in Water 401 Fine Spray 300 - Acrylic;r tn*io1a 44 to pall or grAVel (Non Txa* 7I 1 roams Spray 5{) : A.ctylie an5lit6h FOUNDATION DRAIN BLANKET DRAIN da 8.10 (Trite)' 3Swl Go2cse Spray 350: source; Va. 4. BACKFILL AND COMPACT THE EXCA VA TED SOIL. __ �/ (- FLOW / I I=(I 1 -1 I IJ III -�II T EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SH SL FIGURE 3.01 - la Homogeneous Embankments w/Seepage Controls $11111114wd omoge(mus fill . 30 4a as a4 1A8 Y7 a911r a0 I lF :,1>_`r' ;`1 \` >' '4' min _ f I ••Cut oil trench-4' �i suitablet Soil or rock L--- ........--- . - - --.1 071/0 216 TYPICAL HOMOGENEOUS 87 00 EMBANKMENT at am Tronsitign till 44 to pall or grAVel 4s 2M ire outlet ACaoa�fs Perforated collecttx €outxlAtkini drAin Wanket droin 61 72 FOUNDATION DRAIN BLANKET DRAIN da 8.10 droll or cork Caw oaf 84 Rock or gravel Rock toe -„ , drain 1.11 : .. jab z�' - . tl1 4.17 Transi(iort filter Ttunsilion filter "1t1 0+ CHIMNEY DRAIN TOE DRAIN 70% 411 c: 3 -01 -10 80112 Satttxe .,.SCSE•riginceriitg F'ielti:itrtattal 3.01 - 3 ON SH LLOW SLOPES, STRIPS N PROTECTIVE COVERINGS MAY BE APPLIED ACROSS BERM THE SLOPE. WHERE THG MATERIALBOVE A THE ERM AND ANCHOR It BEHIND THE BERM. BRING MATERIAL DOWN TO A LEVEL AREA BEFORE TERMINATIt/G THE INSTALLATION, , TURN THE END UNDER 4 AND STAPLE Al 12 INTERVALS ,: IN DITCHES APPLY PROTECTIVE COVERING PARALLEL f0 THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL POSSIBLE. ON SAVE SLOPES "VEFIWd PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. I $11111114wd cimwalwlacimu roam . 30 4a as a4 1A8 Y7 a911r a0 72 071/0 216 80 87 00 72, at am ae 44 to 72 4s 2M 4� 61 72 W da 8.10 4B oaf 84 100 tl1 4.17 a.4 "1t1 0+ 1011 11% 70% 411 00 00 80112 IN 08 1114 76 04 'is 8.80 7Z 8E 10110 1311 91 a,0a 7e oath 128 147 0817,1 a v1 84 100 128 W1 104 0.00 B 713. h AmWv-- r- ^rr( -.r (14 An+}YorirxdPVlw (ttiS rid MIE mt"md A r000rd.ml.wdf►A6Tll c:47a " dm�nAoar netwbla %WW4otrr arAb'iM C478• . . (Z•? wmJrot P� 04 We! wu m ern, 0 M cWft hD ' and rlwr Q.D.1 M pNtM (4,) ilk; rrt&wrmt0 trr AM MvI4 bn 4'J fP EW. , . rsloiinlerwladnleftlormaittob eAft ■14kWile . RXSW25XWUWW mmmem, • li�lfatPte: P ■ 4M P.W..4 -MOM W r M=b «ivotanotlp■ 41a1.'tlo W16 error baer arm N jOGCrIJ ■ 1 , imbnr eokrd (a l 0M tfiwriw a vntr b elnYltdllo fx 4V La, d m•rllid 1d'W. Pr.4i dAnd"Yor1*x Davlas (Cap and New) I VA ( 14.1 f_ - f N delwrm r. `,ab Wkwok rtWrn�wlr • ,--CURB INLET _J - I "� y �___._ C0�1VC`I?ETF Bl -Qr:C WIRE SCREEN -r r _ -_ *GRAVEL SHALL BE VDOT ##3, #357 VGRAVEL * FlL TER OR #5 COARSE AGGREGA "7E: it I .it I I�I�JII- BLOCK 8c' GRA VEL CURB INLET g M SOIL STABILIZATION BLANKET NOTE: a SEDIMENT FILTER 3'07 -8 0 TREA TMENT 7 SOIL STABILIZATION MATTING MATERIAL SHALL BE INSTALLED AS NO SCALE Ain cnnl F REQUESTED BY THE ALBEMARLE COUNTY EROSION CONTROL INSPECTOR I iedlrrlent tBOS16 06WAh #11B 397 d destgnhI9hwater 4 431.00 . - ralnage area (acres) I .. DESIGN r+lco-i `wiar R iAwi.t WIT"O t, CF= OF DIEM�AGEW rr»rnavr .. `TH ` 'ytv asln uDluriies (using 2 canbur Intervals) etavatidn (ft) cbntour area (if) volunle(oy) �era .E4nvo, 1. °A .. �� y 429:90; 328 0 .0 -i ., . ,- `'+rr � -..._- _ _.- O t-"I 4 060 1 l; :0 3., 03 28 aAY :'yea = 11 iKi SCOTT COLLINSZ 432:04 2057.0 1.. 39: ,W:.:slwt,4t: Q ,_. 434.00 3201";0 333 upsi(eant €ace slppe 2 2 1 U No. 35791 ,�. 43(,.00 4447,0 615' sgm,owCtrAe+our.wm... W. downstream face slope: 3 `��0� '43$.016 5793.0: 993 < T G151 . +11,5113 ��4 r 'ere ' tr .. c 7 "DA _ . sta . ui 6 3 S'' ba YES IONAL Et wet storage: Wet storage required(ey)(67 'DA) 3 397 d destgnhI9hwater 4 431.00 dewatefing.orifice etevation'(ft) 4 433;X3 t top of dam (ft }: 4 438.00. wet storage provided at this elevation.(cy) 3 307. t top width of darn (ft} s s.0 availab. v+Dkirrle before ale. . (cy) (34`I?A} 1 156 b bottom of basin, (ft) 4 429.,0 oteanout a ,ration (ft) ' '432:14 a approx bottom dinienstiins ° 1 115'r. 0is#ance frgm cieaoia A,fia t)�ifiee (ftj,(? t1} ? ?;6 u upsi(eant €ace slppe 2 2 1 downstream face slope: 3 31 star e dry ag. r 'ere ' tr .. c 7 "DA _ . sta . ui 6 3 307 b ba YES pr'iricipte spilway crest (ft) 4 43600 i ierigth;:of flaw L. (ft} 7 74' dry stv,m provd 4 at this elevation 3 307 e effectiv wl", We R. I I . diam*e of:dewateririg orifica.(in): 6 6 0 L L :1, We (tiaftl®s required: if !t 2). 1 11 diameter: of;*Abio tubing (in)`(oritice+�2") . .810 coliam . YES runoff: d .. Y 7 G (use 0:45 (t>r bare earth) 0 0.45 s sI . of upstream face (Z >1) 2 2 z z it (min) 1 12 s sk7pe ofbarrel (sb) 4 4,54X0 E l2yr`. 3.8- Q 2yr 7 716 l length of. barrel 16 saturated zone (Ls) 4 42.86 E t 2ayr . ,. tit 25yr 1 12:7 n number collars�required 2 2 � � dimension of collars. 4 41'x .1`: u u) principle spilHy: 1 11 i available h'ead.((t 1 11:441 e emergency s i"Y: Y YES Z Z diameter riser (in} . .24 r required capacity (Q25•Qp} (cfs):. 0 0< O O spiiiway capacity, Qp, (cfs) 1 15:0 b bottom Width (ftj 1 12 diameter trash rack'(fn) 3 36 s slaps of .� xist channel (ftfft) 2 20% > barrel length (ft) . . 45 r rrintrrna.04ro of e>At chanrtet:(ft} 1 12' I Ili bead on barrel throu8h.embanicrraent (ill) 7 7:0 o ores# ofspiRrray,(it) 4 437 diameter:. of barrel iii 1 18 SEDIMENT . 6" TOPSOIL EXISTING GROUND NTS TOP OF DAM ELEV. =4J8.00-,T, "� 2`l I.D. 36" O.D., 13" HIGH TEMP. CMP TRASH RACK DEVICE 25 YR. STORM 1.0' MIN. � �--- EMERGENCY SPILLWAY - ELEV. 437.00 _ J ry' ",<. CREST ELEV. = 437.00 _ ;Iii -- II 5:'lI RISER TOP ELEV = 436.00' 1.0 MIN. -.,. 24" DIA. CMP RISER li- Ili. DRY VOLUME ELEV. `'':<,fr . �� W i .l i - REQUIRED = 435.99' ' Q .. 1' SCARIFIED KEY FOR ,;.::rye .� <.. ,- - �11 -1 " D EW IN %t (1 `< , SOIL COHESION ' tA.,,D ATER G s_ _ _ ��.r: -��, fir; <; III - DEVICES . INV. OUT= 429.00' UPSTREAM TOE OF DAM H V- 9. 00 XISTING GROUND iTt�TF -=n-- T,_.� ,"- nom.- a ,- MIN. 30" COMPACTED • `. Ti? SOIL OR AGGREGATE OVER ` BASE PLATE OUTLET PROTECTION VDOT CLASS ll, EC -1 BO OF BASIN CLAY ORED DAM / H 4x4 x1/4" THICK GALV. RIPRAP w LEV. = 405.00 STEEL BASE PLATE KEYED INTO THE > EXISTING GROUND GEDTEXTILE FABRIC // UNDERLA YMENT UJ !NV IN = 429.23' D50 =9" W1 =6, 18" CMP (2) 4.1 X 4.1' GALV. STEEL LENGTH =45' W2 =11, S =7%', L =9', ANTI -SEEP COLLARS SLOPE =0.50% 0=2 drainage area (acres) 13,25 basin volumes (using 2' contour intervals) eie%eW (f.0 contour area (sf) volurne(cy) . 4051,00 8070:4 0. 40)6.0X1 9002:4 31(11 41 408: 050 10951; 0 '1053,8: 41 130 13013.{3 19.49,-'� 412.00 15178,0 2983.4. 4114> t>4 1744:0: 419 to 4,tq;b0 19$ i'06: 5669':5: 1. 418,00 2227(;.0 7127.3 wet storage; wetstorade required (cy)(67`DA) a dewatering orifice elevation: (ft) 407.55 ±?et storage provided at this elevation; (ey) 444 available volume before cleanout (cy) .(WDA) 4151 cleanout elevation (ft) 406.3.5 distance from cleanoutto orifice (ft} (> 1') 1,2 dry storm: dry storage required (cy)`(67 *DA) 888 1. principle spillway crest (ft) 415.50 dry storage provided, at this elevation (cy) 5225 diameter of dewatering orifice (in) 640 diameter of floble tubing (in).(orifice +2°} 8.0 runoff C (use 6.45 for bare earth) 0.45 to '(mlln) . .. 12 i 2yr 3.8 Q2yr 22:7- t 25yr` 5.6 Q 25yr 3€0:7 principle spilmay: available head (ft) 1.30 diametei .riser {in) . 36 ' spiltvray.capacity, Op (cfs) 37 diarrieter trash rack (in) 54 barrel length. (ft) 100. head on barrel through embankment (ft) 11:5 diameter of barrel (iri) 24 MT4"•V*GA Y. ,CiSM.Cr.EiiEmmy 97441'11 eES ?cta H H WATER t`.t.3.. A!.�.). ._ Q A. -_ -_ - --•._. 4R? - STOPJ+GE W.. n s Gau ra C.y, design high water 418.80 top of darn (ft) .. 418,00 top width of dam (ft) 10.0 bottom of basin (ft} 405.0 apprbx bottom dimensions: 171.'x54' upstream face slope. 2 :1 downstream face. s ope . 3:1 balftes; YES length of flow, L (ft) 91 effective width; We {ft) 211.0769 L, I We (baffles. requlred if < 2 }. 0.4 collars: YES depth of water at spillwvay. crest (ft) 10.5 slope of upstraam.face (Z:1) 2 slope of barrel (sb) 0.50% length of barrel in saturated zone (i;s) 64:29 number tours required 2 dimension of collars $.2'x,5:2' emergency spillway., YES required capacity (Q25-Qp) (cfs) 0.0 bottom width (ft) 5p slope of eAst channei (fttfft) 3:3% minimun Vero of.e:4t channel (#t) 10 crest of'1SPIMay (ft) 416.25 SEDIMENT BASIN SB -1A - EXISTING GROUND NTS -i'10, TOP OF DAM ELEV. = 418.00' l�, 25 YR. STORM 1.0' MIN. �, 14'� .�_ ELEV = 416.8' y " ., 1%3 I�I�IFY RISER TOP ELEV. = 41'5.50' 1.0' MIN. ``_�{ 1- -111 = DRY VOLUME ELEV.: L " 11 REQUIRED = 409 63''s� 6" TOPSOIL 54" I.D. 17" HIGH TEMP. CMP TRASH RACK DEVICE ---- EMERGENCY SPILLWAY CREST ELEV. = 416.25 -36" DIA. CMP RISER V SCARIFIED KEY FOR H In W _J O � M u" o � � � U � � O � � O w V uJ Z H a � a V) N M M LU * i ri Q � r i ri in ,�1t N LJ {� -I '6 D1A - �DEWATERING_ ''.:f° '� SOIL COHESION C11 V _ DEuicE ..,` _J s 2°s� x�. " . INV. OUT= 404.0' d" - i l� UPSTREAM TOTE OF DAM ' ' M V = XISTING GROUND d" t-®i ��1 = u H Q MiN. 30" COMPACTED - '- 1 �_ 11111 SOIL OR AGGREGATE OVERL OUTLET PROTECTION (�) W BASE PLATE VDOT CLASS ll, EC -1 OTTOM OF BASIN 7 5 x7.5 x1/4" THICK GALV. CLAY ORED DAM RIPRAP w/ C: ELEV. = 405.00 KEYED INTO THE � STEEL BASE PLATE GEOTEXTILE FABRIC EXISTING GROUND UNDERLA YMENT (N INV. IN = 404.50' N 24" CMP W1 =6, W2 =14, (2) 5.2 X 5.2' GAL V. STEE LENGTH =100' La =12, D=2.5 :5 COLLARS SLOPE= 0.50% `' W Sediment Basin design #2 drainage area (acre's) 6;53' basin volumes (using 2' contour intervals) elevation (ft) contour, area (sf) vvkime(oy) 414:00 1162,0 0 41G:00. 1792:4 1S)8: 418,00 2542:0 268 420.00 6401,0 W 422,00 43(12 -ft 985. 424;00 5424,00 134T dew atering office lv n (ft), wet storage provided at lhis.eiev ation (ey) , available.yolume before Oleanout (Gy) (34-DA) ckmnoute6rAon (ft) distance from cleariout to orifice (ft) (> 1') dry storage; . dry storage required (cy) (6740A) pdriclple.spllMray Crest (ft) dry storage provided at this etevatibn (cY) dianTefer of dewatering orifice (iri) 11 diameter of, fiepble tubing (in) (orifice ±2"') I. runoff: P. (Use 0;45 for bare eamo tc {Nr 12yr 4,t) Q2ys 125yr 6.7 .:0:*r ON 43€3. 419,06 438 222 411.38 1.7 436 421,50 448 6.0. 8:0 045 1i 11. 8 21 >.7. 0 90 30 29.0 r 42': 0 3.5.: 24 DESIGN AM" WATER (24-m. !Paau Euv.) . m • sxaraeE • W£r •,.5748 . fWeacr++r.. I r. rp riesi4ti high water top of dam (ft) top width of dart; (f1) bottom of basin (ft) approx. bottom dimensions: upstream face slope:. downstream face slope: Willes., length of flow, � (ft). effective width, We (ft) L I We (baffles required •if < 2) collars depth (t water atsptltway crest (f) S1 of:upstrearn face. (Z 1). slope of barrel (Sb) length of barrel in saturated; zi9ne;(Ls) wj. number collars required 410006n of collars emergency stn n -, 1. requiredcapacitg:(0g -01, �p)':(cis) bOfRom width (ft) slope of exist channei (fUft} minimun length af:ewt chahnel.(ft); crest of spit Y ,(ti), Ar Ld 0 �- _J Ia. MW=0 ==� 3: Z W F__4 J tD �_ N ° E_ _ mmm ® � a T C AV jW Z ° Q o Q d N _ 1: a- UQ) Q) U ° c5 W �° CZ 0, 1 � Z �' W 0 w LL LL C Z CZ w 0N ® ] UJ z � C O U I .�o ® e r= ; 0 J W � W o ° �° v= l.11 ° °„ ° L 111 3 N B, t� W v a Z ❑x „ w J o . ® c o� HI E- 0 �:� C. W 0 ' Z.5 00 M Y W a 11.11 Z N ,w r' q_ Z ° SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 MT4"•V*GA Y. ,CiSM.Cr.EiiEmmy 97441'11 eES ?cta H H WATER t`.t.3.. A!.�.). ._ Q A. -_ -_ - --•._. 4R? - STOPJ+GE W.. n s Gau ra C.y, design high water 418.80 top of darn (ft) .. 418,00 top width of dam (ft) 10.0 bottom of basin (ft} 405.0 apprbx bottom dimensions: 171.'x54' upstream face slope. 2 :1 downstream face. s ope . 3:1 balftes; YES length of flow, L (ft) 91 effective width; We {ft) 211.0769 L, I We (baffles. requlred if < 2 }. 0.4 collars: YES depth of water at spillwvay. crest (ft) 10.5 slope of upstraam.face (Z:1) 2 slope of barrel (sb) 0.50% length of barrel in saturated zone (i;s) 64:29 number tours required 2 dimension of collars $.2'x,5:2' emergency spillway., YES required capacity (Q25-Qp) (cfs) 0.0 bottom width (ft) 5p slope of eAst channei (fttfft) 3:3% minimun Vero of.e:4t channel (#t) 10 crest of'1SPIMay (ft) 416.25 SEDIMENT BASIN SB -1A - EXISTING GROUND NTS -i'10, TOP OF DAM ELEV. = 418.00' l�, 25 YR. STORM 1.0' MIN. �, 14'� .�_ ELEV = 416.8' y " ., 1%3 I�I�IFY RISER TOP ELEV. = 41'5.50' 1.0' MIN. ``_�{ 1- -111 = DRY VOLUME ELEV.: L " 11 REQUIRED = 409 63''s� 6" TOPSOIL 54" I.D. 17" HIGH TEMP. CMP TRASH RACK DEVICE ---- EMERGENCY SPILLWAY CREST ELEV. = 416.25 -36" DIA. CMP RISER V SCARIFIED KEY FOR H In W _J O � M u" o � � � U � � O � � O w V uJ Z H a � a V) N M M LU * i ri Q � r i ri in ,�1t N LJ {� -I '6 D1A - �DEWATERING_ ''.:f° '� SOIL COHESION C11 V _ DEuicE ..,` _J s 2°s� x�. " . INV. OUT= 404.0' d" - i l� UPSTREAM TOTE OF DAM ' ' M V = XISTING GROUND d" t-®i ��1 = u H Q MiN. 30" COMPACTED - '- 1 �_ 11111 SOIL OR AGGREGATE OVERL OUTLET PROTECTION (�) W BASE PLATE VDOT CLASS ll, EC -1 OTTOM OF BASIN 7 5 x7.5 x1/4" THICK GALV. CLAY ORED DAM RIPRAP w/ C: ELEV. = 405.00 KEYED INTO THE � STEEL BASE PLATE GEOTEXTILE FABRIC EXISTING GROUND UNDERLA YMENT (N INV. IN = 404.50' N 24" CMP W1 =6, W2 =14, (2) 5.2 X 5.2' GAL V. STEE LENGTH =100' La =12, D=2.5 :5 COLLARS SLOPE= 0.50% `' W Sediment Basin design #2 drainage area (acre's) 6;53' basin volumes (using 2' contour intervals) elevation (ft) contour, area (sf) vvkime(oy) 414:00 1162,0 0 41G:00. 1792:4 1S)8: 418,00 2542:0 268 420.00 6401,0 W 422,00 43(12 -ft 985. 424;00 5424,00 134T dew atering office lv n (ft), wet storage provided at lhis.eiev ation (ey) , available.yolume before Oleanout (Gy) (34-DA) ckmnoute6rAon (ft) distance from cleariout to orifice (ft) (> 1') dry storage; . dry storage required (cy) (6740A) pdriclple.spllMray Crest (ft) dry storage provided at this etevatibn (cY) dianTefer of dewatering orifice (iri) 11 diameter of, fiepble tubing (in) (orifice ±2"') I. runoff: P. (Use 0;45 for bare eamo tc {Nr 12yr 4,t) Q2ys 125yr 6.7 .:0:*r ON 43€3. 419,06 438 222 411.38 1.7 436 421,50 448 6.0. 8:0 045 1i 11. 8 21 >.7. 0 90 30 29.0 r 42': 0 3.5.: 24 DESIGN AM" WATER (24-m. !Paau Euv.) . m • sxaraeE • W£r •,.5748 . fWeacr++r.. I r. rp riesi4ti high water top of dam (ft) top width of dart; (f1) bottom of basin (ft) approx. bottom dimensions: upstream face slope:. downstream face slope: Willes., length of flow, � (ft). effective width, We (ft) L I We (baffles required •if < 2) collars depth (t water atsptltway crest (f) S1 of:upstrearn face. (Z 1). slope of barrel (Sb) length of barrel in saturated; zi9ne;(Ls) wj. number collars required 410006n of collars emergency stn n -, 1. requiredcapacitg:(0g -01, �p)':(cis) bOfRom width (ft) slope of exist channei (fUft} minimun length af:ewt chahnel.(ft); crest of spit Y ,(ti), Ar Ld 0 �- _J Ia. MW=0 ==� 3: Z W F__4 J tD �_ N ° E_ _ mmm ® � a T C AV jW Z ° Q o Q d N _ 1: a- UQ) Q) U ° c5 W �° CZ 0, 1 � Z �' W 0 w LL LL C Z CZ w 0N ® ] UJ z � C O U I .�o ® e r= ; 0 J W � W o ° �° v= l.11 ° °„ ° L 111 3 N B, t� W v a Z ❑x „ w J o . ® c o� HI E- 0 �:� C. W 0 ' Z.5 00 M Y W a 11.11 Z N ,w r' q_ Z ° SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 design high water 418.80 top of darn (ft) .. 418,00 top width of dam (ft) 10.0 bottom of basin (ft} 405.0 apprbx bottom dimensions: 171.'x54' upstream face slope. 2 :1 downstream face. s ope . 3:1 balftes; YES length of flow, L (ft) 91 effective width; We {ft) 211.0769 L, I We (baffles. requlred if < 2 }. 0.4 collars: YES depth of water at spillwvay. crest (ft) 10.5 slope of upstraam.face (Z:1) 2 slope of barrel (sb) 0.50% length of barrel in saturated zone (i;s) 64:29 number tours required 2 dimension of collars $.2'x,5:2' emergency spillway., YES required capacity (Q25-Qp) (cfs) 0.0 bottom width (ft) 5p slope of eAst channei (fttfft) 3:3% minimun Vero of.e:4t channel (#t) 10 crest of'1SPIMay (ft) 416.25 SEDIMENT BASIN SB -1A - EXISTING GROUND NTS -i'10, TOP OF DAM ELEV. = 418.00' l�, 25 YR. STORM 1.0' MIN. �, 14'� .�_ ELEV = 416.8' y " ., 1%3 I�I�IFY RISER TOP ELEV. = 41'5.50' 1.0' MIN. ``_�{ 1- -111 = DRY VOLUME ELEV.: L " 11 REQUIRED = 409 63''s� 6" TOPSOIL 54" I.D. 17" HIGH TEMP. CMP TRASH RACK DEVICE ---- EMERGENCY SPILLWAY CREST ELEV. = 416.25 -36" DIA. CMP RISER V SCARIFIED KEY FOR H In W _J O � M u" o � � � U � � O � � O w V uJ Z H a � a V) N M M LU * i ri Q � r i ri in ,�1t N LJ {� -I '6 D1A - �DEWATERING_ ''.:f° '� SOIL COHESION C11 V _ DEuicE ..,` _J s 2°s� x�. " . INV. OUT= 404.0' d" - i l� UPSTREAM TOTE OF DAM ' ' M V = XISTING GROUND d" t-®i ��1 = u H Q MiN. 30" COMPACTED - '- 1 �_ 11111 SOIL OR AGGREGATE OVERL OUTLET PROTECTION (�) W BASE PLATE VDOT CLASS ll, EC -1 OTTOM OF BASIN 7 5 x7.5 x1/4" THICK GALV. CLAY ORED DAM RIPRAP w/ C: ELEV. = 405.00 KEYED INTO THE � STEEL BASE PLATE GEOTEXTILE FABRIC EXISTING GROUND UNDERLA YMENT (N INV. IN = 404.50' N 24" CMP W1 =6, W2 =14, (2) 5.2 X 5.2' GAL V. STEE LENGTH =100' La =12, D=2.5 :5 COLLARS SLOPE= 0.50% `' W Sediment Basin design #2 drainage area (acre's) 6;53' basin volumes (using 2' contour intervals) elevation (ft) contour, area (sf) vvkime(oy) 414:00 1162,0 0 41G:00. 1792:4 1S)8: 418,00 2542:0 268 420.00 6401,0 W 422,00 43(12 -ft 985. 424;00 5424,00 134T dew atering office lv n (ft), wet storage provided at lhis.eiev ation (ey) , available.yolume before Oleanout (Gy) (34-DA) ckmnoute6rAon (ft) distance from cleariout to orifice (ft) (> 1') dry storage; . dry storage required (cy) (6740A) pdriclple.spllMray Crest (ft) dry storage provided at this etevatibn (cY) dianTefer of dewatering orifice (iri) 11 diameter of, fiepble tubing (in) (orifice ±2"') I. runoff: P. (Use 0;45 for bare eamo tc {Nr 12yr 4,t) Q2ys 125yr 6.7 .:0:*r ON 43€3. 419,06 438 222 411.38 1.7 436 421,50 448 6.0. 8:0 045 1i 11. 8 21 >.7. 0 90 30 29.0 r 42': 0 3.5.: 24 DESIGN AM" WATER (24-m. !Paau Euv.) . m • sxaraeE • W£r •,.5748 . fWeacr++r.. I r. rp riesi4ti high water top of dam (ft) top width of dart; (f1) bottom of basin (ft) approx. bottom dimensions: upstream face slope:. downstream face slope: Willes., length of flow, � (ft). effective width, We (ft) L I We (baffles required •if < 2) collars depth (t water atsptltway crest (f) S1 of:upstrearn face. (Z 1). slope of barrel (Sb) length of barrel in saturated; zi9ne;(Ls) wj. number collars required 410006n of collars emergency stn n -, 1. requiredcapacitg:(0g -01, �p)':(cis) bOfRom width (ft) slope of exist channei (fUft} minimun length af:ewt chahnel.(ft); crest of spit Y ,(ti), Ar Ld 0 �- _J Ia. MW=0 ==� 3: Z W F__4 J tD �_ N ° E_ _ mmm ® � a T C AV jW Z ° Q o Q d N _ 1: a- UQ) Q) U ° c5 W �° CZ 0, 1 � Z �' W 0 w LL LL C Z CZ w 0N ® ] UJ z � C O U I .�o ® e r= ; 0 J W � W o ° �° v= l.11 ° °„ ° L 111 3 N B, t� W v a Z ❑x „ w J o . ® c o� HI E- 0 �:� C. W 0 ' Z.5 00 M Y W a 11.11 Z N ,w r' q_ Z ° SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 balftes; YES length of flow, L (ft) 91 effective width; We {ft) 211.0769 L, I We (baffles. requlred if < 2 }. 0.4 collars: YES depth of water at spillwvay. crest (ft) 10.5 slope of upstraam.face (Z:1) 2 slope of barrel (sb) 0.50% length of barrel in saturated zone (i;s) 64:29 number tours required 2 dimension of collars $.2'x,5:2' emergency spillway., YES required capacity (Q25-Qp) (cfs) 0.0 bottom width (ft) 5p slope of eAst channei (fttfft) 3:3% minimun Vero of.e:4t channel (#t) 10 crest of'1SPIMay (ft) 416.25 SEDIMENT BASIN SB -1A - EXISTING GROUND NTS -i'10, TOP OF DAM ELEV. = 418.00' l�, 25 YR. STORM 1.0' MIN. �, 14'� .�_ ELEV = 416.8' y " ., 1%3 I�I�IFY RISER TOP ELEV. = 41'5.50' 1.0' MIN. ``_�{ 1- -111 = DRY VOLUME ELEV.: L " 11 REQUIRED = 409 63''s� 6" TOPSOIL 54" I.D. 17" HIGH TEMP. CMP TRASH RACK DEVICE ---- EMERGENCY SPILLWAY CREST ELEV. = 416.25 -36" DIA. CMP RISER V SCARIFIED KEY FOR H In W _J O � M u" o � � � U � � O � � O w V uJ Z H a � a V) N M M LU * i ri Q � r i ri in ,�1t N LJ {� -I '6 D1A - �DEWATERING_ ''.:f° '� SOIL COHESION C11 V _ DEuicE ..,` _J s 2°s� x�. " . INV. OUT= 404.0' d" - i l� UPSTREAM TOTE OF DAM ' ' M V = XISTING GROUND d" t-®i ��1 = u H Q MiN. 30" COMPACTED - '- 1 �_ 11111 SOIL OR AGGREGATE OVERL OUTLET PROTECTION (�) W BASE PLATE VDOT CLASS ll, EC -1 OTTOM OF BASIN 7 5 x7.5 x1/4" THICK GALV. CLAY ORED DAM RIPRAP w/ C: ELEV. = 405.00 KEYED INTO THE � STEEL BASE PLATE GEOTEXTILE FABRIC EXISTING GROUND UNDERLA YMENT (N INV. IN = 404.50' N 24" CMP W1 =6, W2 =14, (2) 5.2 X 5.2' GAL V. STEE LENGTH =100' La =12, D=2.5 :5 COLLARS SLOPE= 0.50% `' W Sediment Basin design #2 drainage area (acre's) 6;53' basin volumes (using 2' contour intervals) elevation (ft) contour, area (sf) vvkime(oy) 414:00 1162,0 0 41G:00. 1792:4 1S)8: 418,00 2542:0 268 420.00 6401,0 W 422,00 43(12 -ft 985. 424;00 5424,00 134T dew atering office lv n (ft), wet storage provided at lhis.eiev ation (ey) , available.yolume before Oleanout (Gy) (34-DA) ckmnoute6rAon (ft) distance from cleariout to orifice (ft) (> 1') dry storage; . dry storage required (cy) (6740A) pdriclple.spllMray Crest (ft) dry storage provided at this etevatibn (cY) dianTefer of dewatering orifice (iri) 11 diameter of, fiepble tubing (in) (orifice ±2"') I. runoff: P. (Use 0;45 for bare eamo tc {Nr 12yr 4,t) Q2ys 125yr 6.7 .:0:*r ON 43€3. 419,06 438 222 411.38 1.7 436 421,50 448 6.0. 8:0 045 1i 11. 8 21 >.7. 0 90 30 29.0 r 42': 0 3.5.: 24 DESIGN AM" WATER (24-m. !Paau Euv.) . m • sxaraeE • W£r •,.5748 . fWeacr++r.. I r. rp riesi4ti high water top of dam (ft) top width of dart; (f1) bottom of basin (ft) approx. bottom dimensions: upstream face slope:. downstream face slope: Willes., length of flow, � (ft). effective width, We (ft) L I We (baffles required •if < 2) collars depth (t water atsptltway crest (f) S1 of:upstrearn face. (Z 1). slope of barrel (Sb) length of barrel in saturated; zi9ne;(Ls) wj. number collars required 410006n of collars emergency stn n -, 1. requiredcapacitg:(0g -01, �p)':(cis) bOfRom width (ft) slope of exist channei (fUft} minimun length af:ewt chahnel.(ft); crest of spit Y ,(ti), Ar Ld 0 �- _J Ia. MW=0 ==� 3: Z W F__4 J tD �_ N ° E_ _ mmm ® � a T C AV jW Z ° Q o Q d N _ 1: a- UQ) Q) U ° c5 W �° CZ 0, 1 � Z �' W 0 w LL LL C Z CZ w 0N ® ] UJ z � C O U I .�o ® e r= ; 0 J W � W o ° �° v= l.11 ° °„ ° L 111 3 N B, t� W v a Z ❑x „ w J o . ® c o� HI E- 0 �:� C. W 0 ' Z.5 00 M Y W a 11.11 Z N ,w r' q_ Z ° SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 SEDIMENT BASIN SB -1A - EXISTING GROUND NTS -i'10, TOP OF DAM ELEV. = 418.00' l�, 25 YR. STORM 1.0' MIN. �, 14'� .�_ ELEV = 416.8' y " ., 1%3 I�I�IFY RISER TOP ELEV. = 41'5.50' 1.0' MIN. ``_�{ 1- -111 = DRY VOLUME ELEV.: L " 11 REQUIRED = 409 63''s� 6" TOPSOIL 54" I.D. 17" HIGH TEMP. CMP TRASH RACK DEVICE ---- EMERGENCY SPILLWAY CREST ELEV. = 416.25 -36" DIA. CMP RISER V SCARIFIED KEY FOR H In W _J O � M u" o � � � U � � O � � O w V uJ Z H a � a V) N M M LU * i ri Q � r i ri in ,�1t N LJ {� -I '6 D1A - �DEWATERING_ ''.:f° '� SOIL COHESION C11 V _ DEuicE ..,` _J s 2°s� x�. " . INV. OUT= 404.0' d" - i l� UPSTREAM TOTE OF DAM ' ' M V = XISTING GROUND d" t-®i ��1 = u H Q MiN. 30" COMPACTED - '- 1 �_ 11111 SOIL OR AGGREGATE OVERL OUTLET PROTECTION (�) W BASE PLATE VDOT CLASS ll, EC -1 OTTOM OF BASIN 7 5 x7.5 x1/4" THICK GALV. CLAY ORED DAM RIPRAP w/ C: ELEV. = 405.00 KEYED INTO THE � STEEL BASE PLATE GEOTEXTILE FABRIC EXISTING GROUND UNDERLA YMENT (N INV. IN = 404.50' N 24" CMP W1 =6, W2 =14, (2) 5.2 X 5.2' GAL V. STEE LENGTH =100' La =12, D=2.5 :5 COLLARS SLOPE= 0.50% `' W Sediment Basin design #2 drainage area (acre's) 6;53' basin volumes (using 2' contour intervals) elevation (ft) contour, area (sf) vvkime(oy) 414:00 1162,0 0 41G:00. 1792:4 1S)8: 418,00 2542:0 268 420.00 6401,0 W 422,00 43(12 -ft 985. 424;00 5424,00 134T dew atering office lv n (ft), wet storage provided at lhis.eiev ation (ey) , available.yolume before Oleanout (Gy) (34-DA) ckmnoute6rAon (ft) distance from cleariout to orifice (ft) (> 1') dry storage; . dry storage required (cy) (6740A) pdriclple.spllMray Crest (ft) dry storage provided at this etevatibn (cY) dianTefer of dewatering orifice (iri) 11 diameter of, fiepble tubing (in) (orifice ±2"') I. runoff: P. (Use 0;45 for bare eamo tc {Nr 12yr 4,t) Q2ys 125yr 6.7 .:0:*r ON 43€3. 419,06 438 222 411.38 1.7 436 421,50 448 6.0. 8:0 045 1i 11. 8 21 >.7. 0 90 30 29.0 r 42': 0 3.5.: 24 DESIGN AM" WATER (24-m. !Paau Euv.) . m • sxaraeE • W£r •,.5748 . fWeacr++r.. I r. rp riesi4ti high water top of dam (ft) top width of dart; (f1) bottom of basin (ft) approx. bottom dimensions: upstream face slope:. downstream face slope: Willes., length of flow, � (ft). effective width, We (ft) L I We (baffles required •if < 2) collars depth (t water atsptltway crest (f) S1 of:upstrearn face. (Z 1). slope of barrel (Sb) length of barrel in saturated; zi9ne;(Ls) wj. number collars required 410006n of collars emergency stn n -, 1. requiredcapacitg:(0g -01, �p)':(cis) bOfRom width (ft) slope of exist channei (fUft} minimun length af:ewt chahnel.(ft); crest of spit Y ,(ti), Ar Ld 0 �- _J Ia. MW=0 ==� 3: Z W F__4 J tD �_ N ° E_ _ mmm ® � a T C AV jW Z ° Q o Q d N _ 1: a- UQ) Q) U ° c5 W �° CZ 0, 1 � Z �' W 0 w LL LL C Z CZ w 0N ® ] UJ z � C O U I .�o ® e r= ; 0 J W � W o ° �° v= l.11 ° °„ ° L 111 3 N B, t� W v a Z ❑x „ w J o . ® c o� HI E- 0 �:� C. W 0 ' Z.5 00 M Y W a 11.11 Z N ,w r' q_ Z ° SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 6" TOPSOIL 54" I.D. 17" HIGH TEMP. CMP TRASH RACK DEVICE ---- EMERGENCY SPILLWAY CREST ELEV. = 416.25 -36" DIA. CMP RISER V SCARIFIED KEY FOR H In W _J O � M u" o � � � U � � O � � O w V uJ Z H a � a V) N M M LU * i ri Q � r i ri in ,�1t N LJ {� -I '6 D1A - �DEWATERING_ ''.:f° '� SOIL COHESION C11 V _ DEuicE ..,` _J s 2°s� x�. " . INV. OUT= 404.0' d" - i l� UPSTREAM TOTE OF DAM ' ' M V = XISTING GROUND d" t-®i ��1 = u H Q MiN. 30" COMPACTED - '- 1 �_ 11111 SOIL OR AGGREGATE OVERL OUTLET PROTECTION (�) W BASE PLATE VDOT CLASS ll, EC -1 OTTOM OF BASIN 7 5 x7.5 x1/4" THICK GALV. CLAY ORED DAM RIPRAP w/ C: ELEV. = 405.00 KEYED INTO THE � STEEL BASE PLATE GEOTEXTILE FABRIC EXISTING GROUND UNDERLA YMENT (N INV. IN = 404.50' N 24" CMP W1 =6, W2 =14, (2) 5.2 X 5.2' GAL V. STEE LENGTH =100' La =12, D=2.5 :5 COLLARS SLOPE= 0.50% `' W Sediment Basin design #2 drainage area (acre's) 6;53' basin volumes (using 2' contour intervals) elevation (ft) contour, area (sf) vvkime(oy) 414:00 1162,0 0 41G:00. 1792:4 1S)8: 418,00 2542:0 268 420.00 6401,0 W 422,00 43(12 -ft 985. 424;00 5424,00 134T dew atering office lv n (ft), wet storage provided at lhis.eiev ation (ey) , available.yolume before Oleanout (Gy) (34-DA) ckmnoute6rAon (ft) distance from cleariout to orifice (ft) (> 1') dry storage; . dry storage required (cy) (6740A) pdriclple.spllMray Crest (ft) dry storage provided at this etevatibn (cY) dianTefer of dewatering orifice (iri) 11 diameter of, fiepble tubing (in) (orifice ±2"') I. runoff: P. (Use 0;45 for bare eamo tc {Nr 12yr 4,t) Q2ys 125yr 6.7 .:0:*r ON 43€3. 419,06 438 222 411.38 1.7 436 421,50 448 6.0. 8:0 045 1i 11. 8 21 >.7. 0 90 30 29.0 r 42': 0 3.5.: 24 DESIGN AM" WATER (24-m. !Paau Euv.) . m • sxaraeE • W£r •,.5748 . fWeacr++r.. I r. rp riesi4ti high water top of dam (ft) top width of dart; (f1) bottom of basin (ft) approx. bottom dimensions: upstream face slope:. downstream face slope: Willes., length of flow, � (ft). effective width, We (ft) L I We (baffles required •if < 2) collars depth (t water atsptltway crest (f) S1 of:upstrearn face. (Z 1). slope of barrel (Sb) length of barrel in saturated; zi9ne;(Ls) wj. number collars required 410006n of collars emergency stn n -, 1. requiredcapacitg:(0g -01, �p)':(cis) bOfRom width (ft) slope of exist channei (fUft} minimun length af:ewt chahnel.(ft); crest of spit Y ,(ti), Ar Ld 0 �- _J Ia. MW=0 ==� 3: Z W F__4 J tD �_ N ° E_ _ mmm ® � a T C AV jW Z ° Q o Q d N _ 1: a- UQ) Q) U ° c5 W �° CZ 0, 1 � Z �' W 0 w LL LL C Z CZ w 0N ® ] UJ z � C O U I .�o ® e r= ; 0 J W � W o ° �° v= l.11 ° °„ ° L 111 3 N B, t� W v a Z ❑x „ w J o . ® c o� HI E- 0 �:� C. W 0 ' Z.5 00 M Y W a 11.11 Z N ,w r' q_ Z ° SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 dew atering office lv n (ft), wet storage provided at lhis.eiev ation (ey) , available.yolume before Oleanout (Gy) (34-DA) ckmnoute6rAon (ft) distance from cleariout to orifice (ft) (> 1') dry storage; . dry storage required (cy) (6740A) pdriclple.spllMray Crest (ft) dry storage provided at this etevatibn (cY) dianTefer of dewatering orifice (iri) 11 diameter of, fiepble tubing (in) (orifice ±2"') I. runoff: P. (Use 0;45 for bare eamo tc {Nr 12yr 4,t) Q2ys 125yr 6.7 .:0:*r ON 43€3. 419,06 438 222 411.38 1.7 436 421,50 448 6.0. 8:0 045 1i 11. 8 21 >.7. 0 90 30 29.0 r 42': 0 3.5.: 24 DESIGN AM" WATER (24-m. !Paau Euv.) . m • sxaraeE • W£r •,.5748 . fWeacr++r.. I r. rp riesi4ti high water top of dam (ft) top width of dart; (f1) bottom of basin (ft) approx. bottom dimensions: upstream face slope:. downstream face slope: Willes., length of flow, � (ft). effective width, We (ft) L I We (baffles required •if < 2) collars depth (t water atsptltway crest (f) S1 of:upstrearn face. (Z 1). slope of barrel (Sb) length of barrel in saturated; zi9ne;(Ls) wj. number collars required 410006n of collars emergency stn n -, 1. requiredcapacitg:(0g -01, �p)':(cis) bOfRom width (ft) slope of exist channei (fUft} minimun length af:ewt chahnel.(ft); crest of spit Y ,(ti), Ar Ld 0 �- _J Ia. MW=0 ==� 3: Z W F__4 J tD �_ N ° E_ _ mmm ® � a T C AV jW Z ° Q o Q d N _ 1: a- UQ) Q) U ° c5 W �° CZ 0, 1 � Z �' W 0 w LL LL C Z CZ w 0N ® ] UJ z � C O U I .�o ® e r= ; 0 J W � W o ° �° v= l.11 ° °„ ° L 111 3 N B, t� W v a Z ❑x „ w J o . ® c o� HI E- 0 �:� C. W 0 ' Z.5 00 M Y W a 11.11 Z N ,w r' q_ Z ° SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 SEDIMENT BASIN SB -2 '`� W W s" TOPSOIL Z , EXISTING GROUND NTS 0 O U f O U 6,a Z42" I.D. 15" HIGH C) ° � TOP' OF DAM ELEV. = 424.00' ,z'� TEMP. CMP TRASH RACK DEVICE CSI � o U _ 25 YR. STORM J 1.0' MIN. fh EMERGENCY SPILL WAY Q I- ELEV = 422.5' CREST ELEV =422.5 ? I I� i - - - =1 { ( RISER TOP ELEV. = 421.5' 1.0' MIN. �I W II -II 30 DIA. CMP RISER H � o Ili DRY VOLUME ELEV. . U h- - ; 'Z '_11-1 _>% REQUIRED = 421.45' j 1 1' SCARIFIED KEY FOR V ` SOIL COHESION w F �= : 2 6 ; . UTA. -DEWA TERING �k`3,> ''� i 0 W e o E -111, ©EI/10E :$ INV. OUT = 4 ;8.8' 2 = o ° �. > a 0n UPSTREAM TOE OF DAM EXISTING GROUND r JOB NO. -1144 ll_UJ -f1L. LL =- - `, � 5.E MIN. 30" COMPACTED 11ZOS9 o SOIL OR AGGREGATE OVER A OUTLET PROTECTION 0 BASE PLATE VDOT CLASS 11, EC -1 °' BOTTOM (OFBASIN CLAY ORED DAM SCALE N� ELEV. = 414.00 5x5STEEL BASEKPLATE KEYED INTO THE GEOTEXTILE FABRIC NONE °' EXISTING GROUND UNDERLA YMENT = 0 INV. IN = 479.0' ° SHEET NO. r_ ` 24" CMP a o (2) 4.3 X 4.3' GAL V. STEEL LENGTH =40' 2 0 o ANTI -SEEP COLLARS SLOPE =0.5% � 3 ° ' \ \ ` I ' ' "f \` SEDIMENT BASIN #1B DETAIL i I __-- -_ _--••� _.,_ _ 'sow \ \\ \\\ - -- \ —_ __ — // / / / SOA . I 1 \ \ o\ s ,�-'_ \ \ SCALE: 111=20' i t -° /--'` ___ -- - -/_ �` `'\ `` `\, _ `� _\ _-'' / I ° \ \ ! \ \ l \ i I \ \\ 11 , __ _ _ _ -_ \ \ \ \, \ \ _ / i * / __ - -_-{. / ��j \ \ \ \ / - _ `` ' O \ \ t ' \ \ / - \ \ \ \ \ - i I' C \ \ ` \ `\ .1 \ \ \ '\ \ \ / / / / / / '" �- — \~ \ ` \,• .\ '\ \\ - 1' \ - -•- _ -�- — ° / `_'_ -- 1 ID, 1 /a \ 1 \ \ \\ I 1 'i \I\ \ \ \ \ I / // / / _/ - 11-1 ,\ \ \ ` \ -_ / z I SCOTT COLLINS'� v I \ I \ \ \ \ / / / / / r_ - ` �` \ ` \ \ � J/ / / / U o. 35791 ,2� - p 0 ° O / \ \ \ \ \ I ) \ \ \ \ i / / / _...__ �_, ' _ ,\ \, \ \ `\ ^' -.. / - / I_y 4 1 /- \ `, \ 1 I _ o _ i . . / / 1 I ' \ I / \ \ \ ,~ I / / / -- -. -- - _ - - _ _ _ \ \ \ \ \ .\ \, / ! �ssI ONAL E��1 / / I / / / / / / • \ \ \ \ I I / / / \ \ \ \ \ \ / // - / I � 1 / / / / / I l / \ ` \ I 1 % 'f / / / \ \ \ I -- 1 / A � I CONSTRUCTION / // / / 1 / /! /l I l / \ \ 1 ! \\ 1 I I / / - -- --_ - 91 / / / i It ) i _ r' / / I i i / t / _ r i _ � _ t f r-- / _ I ENTRANC / � _ LO 1 cA roN of / / / l / / / / ' // \ 1 -___ - . \\ ' 1r I i \ _ - // // /J! I /� \ -_ \ I 1 . {/ // j/ �`°°. / WAS TACK FOR / / CCNVSTRUCTION / / / / / / / / / I l - \ I t / / 1 i , ` ENTRANCE / / / /, / / / / '�� I I , \ \ 1 ; / / i 1 / ._... / - , t I / ,- - _� _. // / / // / / / 11 / f // i I I }\ 11; `\ \ \t 1' \I / / / / // \ ,/ - w \ i \ \ ." / // /, / f / / ! / f . I \ `_l \\ \ , \ \ / ' ,-- / ,/ / / -\w Q I �� \ \ \ % \ / / / 1 / / / EXISTING TENtPQRARY\� \ -_ "" __ __' , 11 t \ \ / / /`� / / / / / / 11 �! / / \ DIVERSION - --- --- _ _ ; ..� i ` \ \ \ \ ` ___ __ - / r / / ` _- ' � } Lh \ j \ \ \ -' ; \\ \ 24 AMP RIS %R 1 SWAL'�/ \ ,` / / / EL /EV.= 436 _ ! / ! SOW AREA + �� ; \\ \ \\ \ ~ l / / '' / "I - / ; ' \ - \ -,� O\ \ \ \ I/ / / / / / !i /BAFFLES ( 1 c9,. N \ ` \ \ \ _ ' / / / ' '/ / / / (` - - -- _ 1 ~ W \ \ \ z \ \ \ # / / / / ` ,� / ` / / t 'P) \ \, \ \ \ _ r _ -- -' _. _ -' ` f l \ __-- - - __ ---- �} _7_ w 0 \ \\ � \ ` o It , I %' / . / �" ; / / / / / \ } \ \, / \ \\ \\ 1 \ \ \ \, - - - / / •/ -, ' --__ -- _- \ - ---- -' ---- - - L � \ o / - I .- I ,- / \ _ - - .� _ I _ o '' / / / / / S1 QpES / 4� \ I I- (- _I - \, _ ` _ - - -- . -- / ._z / __ � / {' -_ / / / ,/ / f/ / ' \ < ! T IC I —° r `' - -_ t / `' -__ \ _---- — I —� I / / / / / 8`TOP OF DAM 11 c' I 1 - -' /' _•-'• _-_ _- / r I \ / / / / / / / ! ` I;: ELEV. =438.0 ! ' _�' � ;ii �„ _ `\ \ / _ / _ \ _ a _._. _ !' ,1 \ - ,/ /S \ 1 \r iV - - / / / / / / / ' / / z; I.OP / � / $ \ i ' , -;% �v " � - -_� ! ,_l `\ -.-- - _- -- / - r , °' _� - / / .-_-. _-_ _._.. _ 1 -_ -- -_ ___ _ - / \ i F / r f % / ! Tc= szmin. ' - I - . - _ - `\ ' / / / \ \ \ / �, /^ zoo' OLF w/ dELEG. =zs' r r. - - \ j / / ' / \ 18" CMP -\, r ' ��c= "min. f - `�� ` / - A - - \ ` J / / / / / ; / \ BARREL,,. I- % �, , /' / _ r - -Soo' CF w/ ELF. -�8__ _.--' ✓ s I — ' - — -- j-- -- — / / / / / / I . \ \ — '' �a % . . ' '� ° ((c : z.5rFin.) / P� 1 I- - \ _ _ — — - — — _ /I► ll \ \ s f ' / TEMPORARY / / / / / / �/ _ - l/ � ,_ � / - Y - r LIMITS OF - / / , DIVERSION / / / / / / // / / / // / \ \ .� _ ' ° 1_` __ ` _ _ - -- ._ '" _ Y _ - e - DISTURBANCE = _ . o - 11 ' ' ` ,- / zo.59ac. 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T �r _ C "r I C I ; I` I I I / / / / / ,! z / / _ - _ - _ LIM TS OF °NASE I - _ _ z W_ / \ i - _ I / / - -_-_ -- -- - - '� S B # 2 w / _ i , / / \ _ _i is / _ \ \ - L _._ z (__l}T , /r / \ \ \ \ \ \ i {' i r; j ° (1�' C/� (1) Cfr _4II) �l� - f77 - U) if C/) j l ' ' t _-_ - _ -.. _ _ _ / / f / / / / / / / f , .� - - - - - _ 2.L16ac. E / i i-r -r; _ w r / / _ _ __ __ __ __ _ -_ - _ _-_ _. __ _ DEVE OPMENT _ __ __ _ 1 - \ III I I T I � n FT1 € P -1 I -q r rn r� / i r / / / f / / / - ,- a o � / l \' \ i \ ; ` 1. ! I , [' kei, I - -- -- - ;_ - - J I ) i / P S / / / f / / / I -- - - _ _ - -- _ _ 1 _ _ \ r ,� -_ f- �_ c� z \ \ } I \ \ L T ! (I '_� 7 \ \ \ i * - o - r ., - _� _.�� i \u � �,_. �Yi u .- __, `ti - j ; I / j •' / / f / f / / / j \ °^ - _ _ ` \ 1 \ i ,'-_ u L I- CJ "I I 1 I �^ _ __ ,� I� /, I ill -- -_ - -- - -- - - �=_"' / - _ - - _ _ _ ��- / / \ ` w / - \ \ \ \ i I �> I .-. -- - -- - - -- -- ___- --------- �---- ,-- --- - - -- -_ - r � / , / I / / / / / / / / 1 \ / J \ _ _ - _ - - - �-- o \ � \ _• _ -_ _--_ ___. -- -__ - / - -_ '" o u� 0 1-- I ` / I /f ! / / / I - j I: / I w t \ \ \ \ i i t `• I I� I' r / / / i / r , f, /' / t -- _ — _- ._" \ , ..� �,� �_ Z J V V) 1 q�- / i --\ -- !�crd -_\ _._- ._-\_` - �,-1 r_- i / i I STING jh�.QR ACK AL _Y' I I / , / j � _ - /'/ / ` / / / / / / / i 1 / / ' -- - - - -___ _- . -- - -_ __ -_ _-. - -_ - - , \ - f o Q W w i - - — _ _ _ __ _ _ __ y C I ! / // / / / / / ° i . \ H � a = .--" / 1 \ \ \ 1. r I �,-,, t � ..I f l I I 1 r r' __ ' / / / /� ) // / / / / ' / r `', i \ _ \ \` \, ` — '_ ' w Z Lu I'_ 1-1 " i, I \ - �1 qq _ / _ Q E _ / v _ / _ _ - I /I / / T - - _ i 5. -- V) i, - -m- \ - _. \ 1:.. / - - \ \ Z � _ / - -' i I I \ \, \ �.a \ \ i I'�i i i \ _ ' _ - 11 I f I i l ' J I / - - ; / / / / / / / f / / p f _ . `, 1 \ / > c9 uj _ i r II ; - -- _ - . __ __ , _ 11, -- V \ ,r, I _- - -- > j i ; ✓} \ _\ \ `\ \ I I� I _. _ _ - -- - ._._ -- - - _- - - -• _ I ._ __ __ f/ .// /' - r -_ r / / J / r / / / / j / ` _ `-- - -- - - _ _ - - - - _ _ _ _ `` __ - _ _* jL_ 7 /C � , - I I \ \ \ , j I ~ r _ . �_ — - _ - r -_ + _ / / _ / t ! / / / / \ f . - _ \ ,\ ~'` \ / ` \ — i . A - - /' \ COI \ i II I / -- -- ° x _... x< n ti j / / / l /r / ° - - 1 ` \� ` , \ - - _ - \ _ �: _. - f -- / / //f \ \ \ \ -; //i I 14. I / / / / \ / I ' ` - / �- / / / / j l l / / \ ` \ \ \ \ 2 \ \\ \ ' \- ''�Gz . _ - _ \ \ \ _.._ �.� W ` - / J \ \ \ 1,�! I / ./ �. ,/ / _ _ -_ - / �--_ � _ / ./ / I / / `� 1 \ i i \\ �` I.' \ '-, - - `,.. \ \ \ \ — _ -- �\ — _ \ f 1 1-i r f - \. ffi \ \ 1, -�_Tc= szmin. i \ '� -' I \ \ �, _- - _ `\ \ \ \ _ F- rn Ln l/ I �' 6 `\ .r. ° ' '3 �� - \ \ ; / / \ `zoo' OLF w/ ©ELEV. =z1' / / ) \ � / - / ' / f �l / / / / / ' , \ ` \ 1 1 \ \L" , \' ` _ _ __ .� \ \ \ \ - _ __ - - (A, 0 - __ � = L() \ ,\ -/- \ \ 1 j/I . / (Tc= 9.5min.) i 7 1 } 3 11� I General Construction notes for St no 2ament Plans I-50-- 5, -DEVELOPMENT 1. All dome and constructed fill t N. "95X of maximum dry density and 2X of optimum Shp r.tV.qrs! SMP�c6mp�ut�tions:t6r.'Workiheoi$:r�'I PRE Mb geotechnical engineer Is to be present during construction of dame. AbOhia ty od moisture content. All fill material to be approved by a geotechn1col engineer. A li�d.$M!Plj� Meth 00 06U 0'rotoction: Inflow Hydroqraphs Basin Input Data Routing Method: storage-indication 2. Pipe and riser joints ore to be watertight within stormwater management fdcllltlm SCALE: I"=100' 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 -hr Peak SCS Storm Event BasinFlow printout 2-Year, 24-hr Peak SCS Storm Event WMer. Res' ou*r*ces Afba:� 1111i 2-Year, 24 permission has been obtained from the County erosion control Inspector. ------ ------ inflow (cfs) .839 at ii. 96 (h rs) Area (acres) i8 -440 35 CN 78-900 INPUT: discharge (cfs) 3.170 at 12.56 (hrs) 62- Prooct Wbt0shOdl SO mrna�, (Area)' e..... . . ..... E: T e 2 A-P Proj Dr6irla§6 Afeg D69iphation SW F`6oilit 2: ro T t it. lt� rnD t6 M. y�. �P Oe WqqYi fudge factor 1.00 405-00 8574-00 0.0 z Total-i- 19.55 9.55 at; L� storm pollotanteMor.t inpounds;. L�:[P(Pj)f�#12- .721- I [::C(A)21 routed true 4o6.00 discharge (CfS) 20.26i at 1.2.i6 (hrs) Q5�+ 0.,009(i): mean t to* 9S45-00 335.4 water level (ft) 4i6.is2 at 1.2.-16 (hrs) Ikv qnoff jot a 4o8.00 12S82.00 iii6.6 -all storm corred taCtDr peak flow (cfs) 36.o5i storage (cy) 6250-927 Pi sn. on 'O.9 :L2.95o ear Flow) peak time (hrs) 430-00 13741.00 2053.4 I ; .- - - __ _ P., rCent impeNbusness a r I - - - I- I Project,Watershed Summary (2. y .1 . , volume (CY) 4249-383 -+ - � f . . j " I I .-- _- __ 1 11, __ _. I ioo-Year, 24-hr Peak SCS Storm Event 412.00 17158.00 3223.0 1 nfl ow (cfs) i36 -351 at ii.96 (hrs) io-Year, 24-hr Peak SCS Storm Event 414-00 19573-00 4582.4 discharge (cfs) 130.207 at 3-i.98 (hrs) Area (acres) i8 46.00 22135-00 6-126.2 .440 -i.98 (hrs) Iwater level (ft) 78.000 418.00 23148-00 4i6.899 at i CN 7803.2 ./, 't rZa ,, 71, P (in) 3.700 Basin: Belvedere Phase 11 Type III Retention Basin water level 010 414. 0 at 12.50 knrs) storage (CY) 4682 .713 15i66: ac., 18.44 at. P. A� #18 8.89 acit Irainfall, fudge factor time of conc. (hrs) o.i667 Curve routed true time increment (hrs) time limit (hrs) 0.0200 30-000 9 Contour Areas Elevation(ft) Area(sf) Computed Vol.(cy) io-Year, 24-hr Peak SCS Storm Event inflow (cfs) 69.248 at ii.96 (hrs) IZ Ipeak L NV I*V��- C NVS NV, P ahh�al. peetipitatidrij.43" in Alb6marlei proje rea in acre s i n I -44� A Ct ar6a, C. pdJutant concentr�atl6n, mgIJ or:ppm targpt phosphorus �j y IV 6.1 . 2 t . fS 5.13. rds touir tro y moerv. ar V , hvht ', ume in c , , .over I Type 2 ed Vol 0 6": rainfall, P (in) tj L(lpost) f L(pro): 5.600 Start Elevation(ft) 411-00 VOL(Cy) 26o6.31 , 'A time of conc. (hrs) o.i667 %RR: tpn-�qvpl efficienoy , :RRjQ0 L(popt) time increment 1krS1 0 n�rio P ject:Watershed 10-Year Flow) limit (hrs) llpre-Developm6nt PoSt�D6Velopmeit:. D�A. 41A, 15i66: ac., 18.44 at. P. A� #18 8.89 acit 1A1 ac. P ahh�al. peetipitatidrij.43" in Alb6marlei proje rea in acre s i n I -44� A Ct ar6a, C. pdJutant concentr�atl6n, mgIJ or:ppm targpt phosphorus �j y IV 6.1 . 2 t . fS 5.13. rds touir tro y moerv. ar V , hvht ', ume in c , , .over I Type 2 ed Vol 0 6": rainfall, P (in) tj L(lpost) f L(pro): 5.600 Start Elevation(ft) 411-00 VOL(Cy) 26o6.31 , 'A time of conc. (hrs) o.i667 %RR: tpn-�qvpl efficienoy , :RRjQ0 L(popt) time increment 1krS1 0 n�rio P ject:Watershed 10-Year Flow) limit (hrs) 1pre'-Develdo6hent Post- Development Outlet structure 3 4.88 ch i,17.: ds. I D.A. 418 1.99 as, 1.56: Cf9 P ahh�al. peetipitatidrij.43" in Alb6marlei proje rea in acre s i n I -44� A Ct ar6a, C. pdJutant concentr�atl6n, mgIJ or:ppm targpt phosphorus �j y IV 6.1 . 2 t . fS 5.13. rds touir tro y moerv. ar V , hvht ', ume in c , , .over I Type 2 ed Vol 0 6": rainfall, P (in) tj L(lpost) f L(pro): 5.600 Start Elevation(ft) 411-00 VOL(Cy) 26o6.31 , 'A time of conc. (hrs) o.i667 %RR: tpn-�qvpl efficienoy , :RRjQ0 L(popt) time increment 1krS1 0 n�rio P ject:Watershed 10-Year Flow) limit (hrs) 30-000 5 Outlet Structures Outlet structure 3 1 22.16: cfs 1 20.26 cfs I DA #101. IItime 1 4.19 .-efs fudge factor 1.00 Outlet structure o Curve routed true Orifice name: Anti-Vortex Device Uj IZ Ipeak flow (cfs) 69.659 I CA n :�A multiple I ow- ow r ces peak time (hrs) ii.95o cf� T6tafi�- 28.05 cfs 24.44 area (s� Invert (ft) 415-500 volume (cy) 8210 0.087 .7S6 diameter or depth (in) 4,000 discharge into riser width for rect. (in) 0.000 file: thirtysix.txt M W- Ni 2oo-Year, 24-hr Peak SCS Storm Event as Area (acres) i8 coefficient o.600 .440 Outlet structure 4 CN 78-900 invert (ft) 411.000 # Culvert Type 2 multiple 4 RETEN-nON 13AS19 REQUIREMENTS- rainfall, P (in) 9.100 discharge into riser name: Barrel multiple I time of conc. (hrs) o.2667 Minirwril F6reb0y.V6I0n)0=. 0 25 indhes pe re bay 0, opthi: to range:f tiom 4 -6 time increment (hrs) 0.0200 BELVEDERE PHASE I D (in) 24 ro Outlet structure i discharge out of riser time limit (hrs) 30-000 Orifice .000 h (in) 0.000 DEVELOPMENT Ifudge factor 1.00 name: Mid-Flow Orifices r .1 moervious:Ar0a.7 .�g�jl.20 8f Length (ft) ioo.000 M n1mum Forebay.Volume=- 8,098; Cf area (sf) o.i96 routed true diameter or depth (in) 6.000 Slope 0,0050 peak flow (cfs) 137-i6o width for rect. (in) Manning's n 0.013 9 I W 580. d 0.000 Ia peak time (hrs) ii.95o coefficient o.600 inlet coeff. Ke 0.500 < "r. �008 lity V volume (cy) i6i67A69 :70'20: Cf Equation constant set 3 WQV Xr4) invert (ft) 43.4-000 Tc".f2h Re=Wl- Invert (ft) 404,500 I4 ioo'GEF wj.AnEV.'g' 491 multiple _E -Ago discharge into riser WV -- li&.66ac.,_ 9c=o, "I - Area of, Ar6a of.Wet* �35�ClPwjAEL�V_-W" .1 CN=L; HeVation Volurrio Eloation volurric" Outlet structure 2 __55_ 10 bav 115ond �Tc=o-64) Weir z "I 1_� ,- __j C our� Isf) Contomr� (�f) name: Emergency Spillway length (ft) So.000 .0 side angle 71-570 4 245 :405 0 P5 coefficient 3.300 47 406: i 1,383 4W :545: 0 invert lift) 06.250 multiple 3. C r 408, 11 408 :36049 discharge through dam ST .J?_ROJE T - ----- 9,938: 1 410 1 N V95 31.41 .55442 II9j93.8: .41,1 TO 149 It .411: ::O:, I4 2 123,726, 9,938 .414 O.. 22� 13 5 165�40.8 6 938 416 -JOF I-41 . I . . . ", IN6W Obve 9P pn* *iiivious Cover <-- 10%) 4118 9 418 23i148: 210687 __rd X - i"', A T. I�_L R % RR A Iift Area 3 22,32 5012 1 2840 I c= o. its nrs. 41V I/ 4W44 IIEL L 7%�LA EV.= 12411� 100 ( =0 tTc i6) 416-5'-EF wt[A-ELEV.:ff�o' ISPILL WA Y CREST /41W (Tc=o.02) TOP OF DAM ELEVA 770N= 416.25 ELEV 418. 0 HANSON CONCRETF- AN77-VOR7EX TRASHRACK. IE GRA SS WEIR IBASIN TOP OF DAM SEE SHEET 11 OF THE FINAL WD I 19 TOP OF FOREBA Y DAM S17E PLANS FOR ADD17IONAL OUTFALL CHANNEL W1 IWID TH= 1 0. O' A T AN 100 YEAR INFORMA 770N. Iov 'A WIDTH= 5' AT AN J. 1 SIDE SLOPES. ID 1-B ELEVA TION= 418' WS.E.=416.90 10 YEAR W S. E. 416.15 I__C \4# ELEVATION= 410.00 \\\��,,,FACILITY 0 0 C=O.1 8hrs. 2 YEA R 36" RCP MULT-STAGE RISER.- W. S. E. = 414.14 FOUR 04" LOW-FLOW ORIFICES A I�bGATIQN 6F N�Z -F ----------- ------- ------------- ---------------------------------- - - rLEV 411.0, FOUR 06" MID LOW ITY ORIFICES AT ELEV=414.0' & RISE, ----------- /FXCkI ----- --------------------------- 7 - ---- -------------- - ---- 7 ------ C ------- --------- 415. TOP ELEV A T 1 O' AQUATIC BENCH (IV. IIORIFICE COEFF= 0.6 1.0, �IMIT`$ 1i 7RASH RACKS SHALL BE IINSTALLED ON ALL No ORIFICES IN A C NCE IGRAPHIC SCALE L 10.01 WEIR COEFF= J.J W/ THE DETAILS SHOW 24 CL. RCP BARREL ION SHEET 1 1 OF THE �,Ioo 0. 50 100 200 I77 IN V IN= 404.50 IEQUI VAL EN T 4,Op "I 1 00 LF 0 0. 507. FINAL S17E PLANS, OR FOREBA Y L WA Y WV OUT= 404.00' /V RIPRAP LINED ELEVATION= 409.0 IN FEET 1 inch 100 ft. SPILL WA Y RISER FOO TING _6 FOREBAYSPILLWAY NOTES: 100 YEAR PR INCIM E SPILL WA Y - ------ ...... WATER QUALITY FOR THIS PROJECT IS MET THROUGH THE PROPOSED TYPE III RETENTION SCALE: 1 =100 WS.E.=416.90 SCA T L- I I(NO T TO I, BASIN& PROVIDES A REMOVAL EFFICIENCY OF65%, IN ACCORDANCE WITH THE APPROVED PRELIMINARY PLANS, THE PROPOSED FACILITY IS OVER DESIGNED TO COMPENSATE FOR 10 YEAR LOTS i82-i8g BEING RELEASED UNTREATED. THE REMOVAL RATE REQUIRED FOR THE MIN. REQUIRED FOREBAY W. S. E. 416.15 2 YEA R ADDITIONAL 9% REMOVAL RATE ABOVE THE MINIMUM REQUIREMENTS. THE FACILITY 15 VOLIUME=9,096cf ULTIMATE BUILDOUT OF THIS DEVELOPMENT IS 56% & IS THEREFORE PROVIDING AN ji FOREBA Y VOLUME W S. E. 414.14 F ALSO OVER DESIGNED BECAUSE THE IMPERVIOUS AREAS BEING RELEASED FROM THESE LOTS HAS BEEN ACCOUNTED FOR IN THE WATER QUALITY VOLUME & DETENTION FOR PROW,'DED=9,9J8cf 10' WDE TOP OF DAA4 THE MIN. REQUIRED WQ V ELEV= 418.0 (4X) 72, 76 7C f N NVS NVE FACILITY. 7 N THE DETENTION REQUIREMENTS FOR THIS PROJECTARE METTHROUGH THE PROPOSED SWM FACILITY, AS WELL AS SWM #4. SWM #4, AS DESIGNATED BY THE ORIGINAL CONCRETE EVENTS DO NOT CREST 774E REZONING PLAN (LOCATED IN BLOCK 3) WAS DESIGNED TO HANDLE SOME OF THE 50' WDE GRASS WEIR 100 YEAR - - - - - - - - - - VOR TEX IANTI DETENTION REQUIREMENTS FOR THIS PHASE. BECAUSE OF SWM #4 & THE OVER L EMERGENCY SPILL WA Y OUTFALL CHA NNEL W/ WS.E.=416.90 I5' WIDE FOREBA Y TOP DETENTION PROVIDED IN THE PROPOSED SWM FACILITY, OVERALL DETENTION IS TRASHRACK ACHIEVED FOR THIS DEVELOPMENT. OF DAM ELEV= 410 1 SIDE SL OPES. TOP OF DAY KIDTH= 10' AT AN tIELEVA 770N= 418' MAX. EMBANKMENT t =14' (418-404) H T. III.. .. . .. It1,10' OF tII7' OF M. WS.E.= 1 O' AQUATIC BENCH FREEBOARD ONDING P DURING THI BO TTOM 100- YR 41 1. 00 DEP TH ----------- -------------------- ------------------ STORY FOREBA Y ELEV IORIFICE COEFF 0. 6 IEVENT -RE NEIGHBORHOOD ___FUTU t7 405.0 CENTER-SITE 4111# WEIR COEFF.= 3.3 �V, --- - -------- IIMIN. 8' WIDE @ TOP & 13' 36" RCP MULT-STAGE Rl DEEP IMPERVIOUS CORE & 0011005 4qW4 --M LOW-FLOW ORIFICES AT CUTOFF TRENCH WITH 1: 1 MR 0 M 10 MAN 1111111111-0-111111111 WIDE FOREBAY DAM & io'WIDE FORE FOUR 04 EMER F BAY 42 ::CL. N RCP BARREL SIDE SLOPES. SEE DETAIL ON GABION BASKETS WITH VDOT #3 COARSE RE 7EN 77ON ORIFICES AT ELEV =414. O' & RISER INV IN= 404.50 L GRASS LINED ISPILLWAY SHALL BE CONSTRUCTED OF BOTTOM ELEV 411.0' FOUR 06" MID-FLOW 100 LF @ 0.50Y. SPILL WA Y SHEET 1 1 OF THE FINAL SITEELEVA 770N= 416.25 SPILL WA Y PLANS FOR ADDITIONAL AGGREGATE. GEOTEXTILE FILTER FABRIC BASIN= TOP ELEV AT 415.5' OUT= 404.00' 405.00 INV L INFORMATION. ------ - ----- ---- WEIR CREST ELEV.= 409-00' BELVEDERE PHASE I' EMERGENCYSPIIJaWAY UNDERLAYMENT SHALL BE INSTALLED. f DEVELOPMENT TENTION RA SIN INTS t SCAT L- (NO T TO IIIG E I E C;[X RETENTION BASIN DETAIL I. . . . . . . . . . . . SCALE: 1"=30' iu U tD-RAfNAGE.DIVIDE I--ULTIMA`Tt: BUILD OUT CF (DETAINED) 16.44ac. C 9 II_0T 3.96 ILOT 147 T _____ITY EASE II�OTi, 9REBAY VOLUME r LOTi7o _Q9 D, 9. LOT 154 BYTH V ,4�1 'j%' ijUA,"l TIN DI f Uri 0 I--utADIm 1 \\\,tAL ILI I Y &SP AP, u.53 AC.- PARRPL11 T�P'�F PAMI 6D A""`/`*"" ROPQ�;E[ LOT i8; L;KU;a1ED �TONE SWM 77 PPE�SP CE AC ESS ROAD.,,/ GRAPHIC SCALE SEE S "POST ENT T�TE IFUIZIL ALIVNMLN 0 50 100 2DO I/ 7\ j I-7 PLAN FOR o6'OLFw/AELrV.= PLAN77NGS IN FEET ELEV 06" (Tc-o i5) -1,UYV UKIt-RA:Z) A I 270-,F w/ A ELEV (Tc=o.o:L) r-Lr-V. Al 1%10.0 I2 I inch = 100 ft. E ?i:-741 O' & RISER TOP �EV I 0 WsCOT 7R. MOLLINS i Z 0 U No. 35791 !AL z 0 L CK U In W 0 U) W ce Z Uj Uj _j 0 U_ U z U En ca Z U U-1 D in 0 z U 0 jX Uj U-) z Uj V) Z 5; 0 11.1 P-4 C,e (n uj co cyi 0) (y) 9r:10 CN Arm W. won= L9 W 0 1110111111111111111111111 W M& W U1 D z W W ry W 0 (D 0 0 0 < CL 2: 00 U o-6 0 Uj Uj Uj Uj < LE z Uj < Uj > Uj C) U.J ca 0 V e*�Dev'e6p'meht 1pdsi-1 )L-Vellop .. ment 1D.A. 41A 1 22.16: cfs 1 20.26 cfs I DA #101. 1. 5.90 cfs 1 4.19 .-efs ow- ow r ces peak time (hrs) ii.95o cf� T6tafi�- 28.05 cfs 24.44 area (s� Invert (ft) 415-500 volume (cy) 8210 0.087 .7S6 diameter or depth (in) 4,000 discharge into riser width for rect. (in) 0.000 file: thirtysix.txt M W- Ni 2oo-Year, 24-hr Peak SCS Storm Event as Area (acres) i8 coefficient o.600 .440 Outlet structure 4 CN 78-900 invert (ft) 411.000 # Culvert Type 2 multiple 4 RETEN-nON 13AS19 REQUIREMENTS- rainfall, P (in) 9.100 discharge into riser name: Barrel multiple I time of conc. (hrs) o.2667 Minirwril F6reb0y.V6I0n)0=. 0 25 indhes pe re bay 0, opthi: to range:f tiom 4 -6 time increment (hrs) 0.0200 BELVEDERE PHASE I D (in) 24 ro Outlet structure i discharge out of riser time limit (hrs) 30-000 Orifice .000 h (in) 0.000 DEVELOPMENT Ifudge factor 1.00 name: Mid-Flow Orifices r .1 moervious:Ar0a.7 .�g�jl.20 8f Length (ft) ioo.000 M n1mum Forebay.Volume=- 8,098; Cf area (sf) o.i96 routed true diameter or depth (in) 6.000 Slope 0,0050 peak flow (cfs) 137-i6o width for rect. (in) Manning's n 0.013 9 I W 580. d 0.000 Ia peak time (hrs) ii.95o coefficient o.600 inlet coeff. Ke 0.500 < "r. �008 lity V volume (cy) i6i67A69 :70'20: Cf Equation constant set 3 WQV Xr4) invert (ft) 43.4-000 Tc".f2h Re=Wl- Invert (ft) 404,500 I4 ioo'GEF wj.AnEV.'g' 491 multiple _E -Ago discharge into riser WV -- li&.66ac.,_ 9c=o, "I - Area of, Ar6a of.Wet* �35�ClPwjAEL�V_-W" .1 CN=L; HeVation Volurrio Eloation volurric" Outlet structure 2 __55_ 10 bav 115ond �Tc=o-64) Weir z "I 1_� ,- __j C our� Isf) Contomr� (�f) name: Emergency Spillway length (ft) So.000 .0 side angle 71-570 4 245 :405 0 P5 coefficient 3.300 47 406: i 1,383 4W :545: 0 invert lift) 06.250 multiple 3. C r 408, 11 408 :36049 discharge through dam ST .J?_ROJE T - ----- 9,938: 1 410 1 N V95 31.41 .55442 II9j93.8: .41,1 TO 149 It .411: ::O:, I4 2 123,726, 9,938 .414 O.. 22� 13 5 165�40.8 6 938 416 -JOF I-41 . I . . . ", IN6W Obve 9P pn* *iiivious Cover <-- 10%) 4118 9 418 23i148: 210687 __rd X - i"', A T. I�_L R % RR A Iift Area 3 22,32 5012 1 2840 I c= o. its nrs. 41V I/ 4W44 IIEL L 7%�LA EV.= 12411� 100 ( =0 tTc i6) 416-5'-EF wt[A-ELEV.:ff�o' ISPILL WA Y CREST /41W (Tc=o.02) TOP OF DAM ELEVA 770N= 416.25 ELEV 418. 0 HANSON CONCRETF- AN77-VOR7EX TRASHRACK. IE GRA SS WEIR IBASIN TOP OF DAM SEE SHEET 11 OF THE FINAL WD I 19 TOP OF FOREBA Y DAM S17E PLANS FOR ADD17IONAL OUTFALL CHANNEL W1 IWID TH= 1 0. O' A T AN 100 YEAR INFORMA 770N. Iov 'A WIDTH= 5' AT AN J. 1 SIDE SLOPES. ID 1-B ELEVA TION= 418' WS.E.=416.90 10 YEAR W S. E. 416.15 I__C \4# ELEVATION= 410.00 \\\��,,,FACILITY 0 0 C=O.1 8hrs. 2 YEA R 36" RCP MULT-STAGE RISER.- W. S. E. = 414.14 FOUR 04" LOW-FLOW ORIFICES A I�bGATIQN 6F N�Z -F ----------- ------- ------------- ---------------------------------- - - rLEV 411.0, FOUR 06" MID LOW ITY ORIFICES AT ELEV=414.0' & RISE, ----------- /FXCkI ----- --------------------------- 7 - ---- -------------- - ---- 7 ------ C ------- --------- 415. TOP ELEV A T 1 O' AQUATIC BENCH (IV. IIORIFICE COEFF= 0.6 1.0, �IMIT`$ 1i 7RASH RACKS SHALL BE IINSTALLED ON ALL No ORIFICES IN A C NCE IGRAPHIC SCALE L 10.01 WEIR COEFF= J.J W/ THE DETAILS SHOW 24 CL. RCP BARREL ION SHEET 1 1 OF THE �,Ioo 0. 50 100 200 I77 IN V IN= 404.50 IEQUI VAL EN T 4,Op "I 1 00 LF 0 0. 507. FINAL S17E PLANS, OR FOREBA Y L WA Y WV OUT= 404.00' /V RIPRAP LINED ELEVATION= 409.0 IN FEET 1 inch 100 ft. SPILL WA Y RISER FOO TING _6 FOREBAYSPILLWAY NOTES: 100 YEAR PR INCIM E SPILL WA Y - ------ ...... WATER QUALITY FOR THIS PROJECT IS MET THROUGH THE PROPOSED TYPE III RETENTION SCALE: 1 =100 WS.E.=416.90 SCA T L- I I(NO T TO I, BASIN& PROVIDES A REMOVAL EFFICIENCY OF65%, IN ACCORDANCE WITH THE APPROVED PRELIMINARY PLANS, THE PROPOSED FACILITY IS OVER DESIGNED TO COMPENSATE FOR 10 YEAR LOTS i82-i8g BEING RELEASED UNTREATED. THE REMOVAL RATE REQUIRED FOR THE MIN. REQUIRED FOREBAY W. S. E. 416.15 2 YEA R ADDITIONAL 9% REMOVAL RATE ABOVE THE MINIMUM REQUIREMENTS. THE FACILITY 15 VOLIUME=9,096cf ULTIMATE BUILDOUT OF THIS DEVELOPMENT IS 56% & IS THEREFORE PROVIDING AN ji FOREBA Y VOLUME W S. E. 414.14 F ALSO OVER DESIGNED BECAUSE THE IMPERVIOUS AREAS BEING RELEASED FROM THESE LOTS HAS BEEN ACCOUNTED FOR IN THE WATER QUALITY VOLUME & DETENTION FOR PROW,'DED=9,9J8cf 10' WDE TOP OF DAA4 THE MIN. REQUIRED WQ V ELEV= 418.0 (4X) 72, 76 7C f N NVS NVE FACILITY. 7 N THE DETENTION REQUIREMENTS FOR THIS PROJECTARE METTHROUGH THE PROPOSED SWM FACILITY, AS WELL AS SWM #4. SWM #4, AS DESIGNATED BY THE ORIGINAL CONCRETE EVENTS DO NOT CREST 774E REZONING PLAN (LOCATED IN BLOCK 3) WAS DESIGNED TO HANDLE SOME OF THE 50' WDE GRASS WEIR 100 YEAR - - - - - - - - - - VOR TEX IANTI DETENTION REQUIREMENTS FOR THIS PHASE. BECAUSE OF SWM #4 & THE OVER L EMERGENCY SPILL WA Y OUTFALL CHA NNEL W/ WS.E.=416.90 I5' WIDE FOREBA Y TOP DETENTION PROVIDED IN THE PROPOSED SWM FACILITY, OVERALL DETENTION IS TRASHRACK ACHIEVED FOR THIS DEVELOPMENT. OF DAM ELEV= 410 1 SIDE SL OPES. TOP OF DAY KIDTH= 10' AT AN tIELEVA 770N= 418' MAX. EMBANKMENT t =14' (418-404) H T. III.. .. . .. It1,10' OF tII7' OF M. WS.E.= 1 O' AQUATIC BENCH FREEBOARD ONDING P DURING THI BO TTOM 100- YR 41 1. 00 DEP TH ----------- -------------------- ------------------ STORY FOREBA Y ELEV IORIFICE COEFF 0. 6 IEVENT -RE NEIGHBORHOOD ___FUTU t7 405.0 CENTER-SITE 4111# WEIR COEFF.= 3.3 �V, --- - -------- IIMIN. 8' WIDE @ TOP & 13' 36" RCP MULT-STAGE Rl DEEP IMPERVIOUS CORE & 0011005 4qW4 --M LOW-FLOW ORIFICES AT CUTOFF TRENCH WITH 1: 1 MR 0 M 10 MAN 1111111111-0-111111111 WIDE FOREBAY DAM & io'WIDE FORE FOUR 04 EMER F BAY 42 ::CL. N RCP BARREL SIDE SLOPES. SEE DETAIL ON GABION BASKETS WITH VDOT #3 COARSE RE 7EN 77ON ORIFICES AT ELEV =414. O' & RISER INV IN= 404.50 L GRASS LINED ISPILLWAY SHALL BE CONSTRUCTED OF BOTTOM ELEV 411.0' FOUR 06" MID-FLOW 100 LF @ 0.50Y. SPILL WA Y SHEET 1 1 OF THE FINAL SITEELEVA 770N= 416.25 SPILL WA Y PLANS FOR ADDITIONAL AGGREGATE. GEOTEXTILE FILTER FABRIC BASIN= TOP ELEV AT 415.5' OUT= 404.00' 405.00 INV L INFORMATION. ------ - ----- ---- WEIR CREST ELEV.= 409-00' BELVEDERE PHASE I' EMERGENCYSPIIJaWAY UNDERLAYMENT SHALL BE INSTALLED. f DEVELOPMENT TENTION RA SIN INTS t SCAT L- (NO T TO IIIG E I E C;[X RETENTION BASIN DETAIL I. . . . . . . . . . . . SCALE: 1"=30' iu U tD-RAfNAGE.DIVIDE I--ULTIMA`Tt: BUILD OUT CF (DETAINED) 16.44ac. C 9 II_0T 3.96 ILOT 147 T _____ITY EASE II�OTi, 9REBAY VOLUME r LOTi7o _Q9 D, 9. LOT 154 BYTH V ,4�1 'j%' ijUA,"l TIN DI f Uri 0 I--utADIm 1 \\\,tAL ILI I Y &SP AP, u.53 AC.- PARRPL11 T�P'�F PAMI 6D A""`/`*"" ROPQ�;E[ LOT i8; L;KU;a1ED �TONE SWM 77 PPE�SP CE AC ESS ROAD.,,/ GRAPHIC SCALE SEE S "POST ENT T�TE IFUIZIL ALIVNMLN 0 50 100 2DO I/ 7\ j I-7 PLAN FOR o6'OLFw/AELrV.= PLAN77NGS IN FEET ELEV 06" (Tc-o i5) -1,UYV UKIt-RA:Z) A I 270-,F w/ A ELEV (Tc=o.o:L) r-Lr-V. Al 1%10.0 I2 I inch = 100 ft. E ?i:-741 O' & RISER TOP �EV I 0 WsCOT 7R. MOLLINS i Z 0 U No. 35791 !AL z 0 L CK U In W 0 U) W ce Z Uj Uj _j 0 U_ U z U En ca Z U U-1 D in 0 z U 0 jX Uj U-) z Uj V) Z 5; 0 11.1 P-4 C,e (n uj co cyi 0) (y) 9r:10 CN Arm W. won= L9 W 0 1110111111111111111111111 W M& W U1 D z W W ry W 0 (D 0 0 0 < CL 2: 00 U o-6 0 Uj Uj Uj Uj < LE z Uj < Uj > Uj C) U.J ca 0 V JOB NO, W 112059 0 SCALE 0 7E-) x- W 0 Uj CL JOB NO, a) E 112059 0 SCALE 0 AS SHOWN SHEET NO. 5