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HomeMy WebLinkAboutWPO201300058 Plan - Approved 2013-08-20EROSION &SEDIMENT CONTROL AN TORMWATER MANAGEMENT PLAN FOR HOLLYMEAD TOWNCENTER -BLOCK C4 A PORTION OF TM 32, PARCEL 41 L R10 DISTRICT, L EM RLE COUNTY, VIRGINIA ZMA 2001 - 00020 z: 1 1 1 1 1 t i i t t t t t i t t t t t t t t t t t t t t I t t t t t t TMP 32B -A Tribal Properties, LLC Zone: NMD t t Use: Vacant t t I / Lo L t 9 Lo �s TMP 32 -402 ; 6 Edlich Drive Realty, LLC Lot A Zone: LI Lot B - - - -- -I -- ::•: I Lot 27 1 .............. , Use: Warehouse Lot 16 Lot 28 • :.. Lot 15 :.'• • • / Lot 1 _ -Lot 29 3 Lot 30 -Lot 1 _--- - -� - -- — 31 �•�•••� /� Lot 12 _- -� ___Lot 32 Q.I...::: : :. : :: Lot......... ............................... 11 - -Lot - --- -- Lot 33 Q ..........• .................... Lot 1 O /> — Lot 34 ' ::: :::..: :Lot 9 ............ Lot 35 Thek .. : .......:.:.:.:..... .. : • ..: . , : :: .:.:. . .:.•::Lt 8 L_ 36 .. V. 5. �V Lot .. ..•••• .. • .... .....••••••. . o . .... . • . : ........ . --Lot 6 Lot 37 .....:;::...::..:,:;:.:::,:::.:::::..;.,::: ..:....:....... ... :..... ;..:. :;.,.,:.;. ;...... , . ' , .. . __Lot __5 ¢ _Lot 38 ........ . . ...•....•.•.•:•:.;:.:. __ Lot 39 : '\ Lot 4 - Lot 40 ...... :. TMP 32 41 L \ Lot 3 _ 1_ - - - -- ....Post'.0 tice'.L�rnd.'.Trc�st• 41 VY.. ---Lot 42 Z07GQ:.':PD...• ......... ...: __L - - -- ° Lot 1 Lo .Ilse:; ; czc ........... ................. . . . el Fark' e .'..'.'.'•'.' : :•'•'.'. .. , ,P. riyate. Road..... :• • • �.. TMP 32 -41P ..... ..... .. :.............. .: ..` ........ �............ Post Office Land Trust Aropoed; Boundary; Lime..:..:.:..:...:.:.• .........:.: :::....:........... Zone: PD -MC Area To Be Dedicated , ... • .. . .... • Use: Residential To Public R/W :. :: : :....: :.' ::.. 1 TMP 32B- 01 -101A Block' C4,....... • ......... • t\ Tribal Properties, LLC :.: :.: . :..1. %...•.•.•.•.•.•. • ......... Zone: NMD ;:;:;;;:;;;:;,;,;;;;;;;;;;;;; ;;;;:;:;:;.;.; ;;:;.;;;:;;;.:.;. ;. ;. ...:.:.:...... Use: Residential Boundary Line .,...:.: , ► ea; To .... Dedicated ; ; To Be Vacated TMP 32 -41 Q N The Dainel Croup, Inc. PD -MC TMP 32-41K Use: Residential / •� \\ Rosewood Village of % •�` `� Hollymead Zone: PD -MC / Use: Residential /_x/\<,P , 0 ES ES2 ES3 � ES4 ES5 ESb ESbA ES7 Cover Sheet Notes, Abbreviations, & Legend Existing Conditions Erosion & Sediment Control Plan E &SC Notes and Details Storm Sewer Drainage Areas Storm Drainage Profiles Storm Sewer Calculations & SWM Notes CURRENT DEVELOPMENT ENGINEER APPROVED C, t.�rrty Cc�MrnUNify [N 9V - ,'lr)r)rqent Dep -aftc'.rat Date - --- Gk, s 4 S W M ?— n Eo N (� t' 't CNI O s — U Cn O Cn W tz [am + +� .3 28 V �sI9NAL J�Cs a 914 ml�l� ° � o 1-1 OI m 0 w Y U w U U C2 m 0 w z C7 0 ui � � U O° U V ►n w U U V 0 ca INDEX TITLE: ESI SHEET NO: 1 OF 8 DATE: 08/13/13 u.i z w �--� E-1 J W O U INDEX TITLE: ESI SHEET NO: 1 OF 8 DATE: 08/13/13 �--� E-1 W O U O E­1 Q W O w C) w W �+ w DOM. PROJECT NO:13.0018 INDEX TITLE: ESI SHEET NO: 1 OF 8 DATE: 08/13/13 SITE DATA & GENERAL NOTES 100% ABBREVIATIONS LAND SCHEDULE: PRE - DEVELOPMENT (SF) % LEGEND % LOTS 0 0 50,857 SF 60.5 SITE DATA 0 0 5,901 SF GENERAL OPEN SPACE A 0 0 6,595 SF 7.8 OPEN SPACE B 0 0 3,261 SF 3.9 OPEN SPACE C 0 0 OWNER 1.3 OPEN SPACE D 0 0 1,714 SF 2.1 EXIST PROP DESCRIPTION 17.4 EXIST 84,009 SF. (1.929 ACRES) 100 PROP DESCRIPTION POST OFFICE LAND TRUST; CHARLES WM HURT & SHIRLEY L FISHER, TRUSTEES GENERAL CONSTRUCTION NOTES: 1. Prior to any construction within any existing public right -of -way, including connection to ABAN ABANDON(ED) MAX MAXIMUM -- DROP INLET PROPERTY LINE x 165 TC x 125 TC TOP OF CURB ELEVATION PO BOX 8147 any existing road, a permit shall be obtained from the Virginia Department of STR DRAINAGE STRUCTURE FH FIRE HYDRANT TSV TAPPING SLEEVE & VALVE FM FORCE MAIN UP UTILITY P OLE F &C FRAME AND COVER CHARLOTTESVILLE, VA 22906 Transportation (VDOT). This plan as drawn may not accurately reflect the requirements of the permit. Where any discrepancies occur the requirements of the permit shall govern. ADJ ADJUST MIN MINIMUM GT GREASE TRAP ADJACENT PROPERTY LINE x 165 BC x 125 BC BOTTOM OF CURB ELEVATION DEVELOPER: 2. All materials and construction methods shall conform to current specifications and AHD AHEAD MON MONUMENT CONCRETE Ili C) W W POST OFFICE LAND TRUST; CHARLES WM HURT & SHIRLEY L FISHER, TRUSTEES standards of VDOT unless otherwise noted. W - - - - - - - - - - VACATED PROPERTY LINE x 155 FL x 125 FL FLOW LINE ELEVATION PO BOX 8147 3. Erosion and siltation control measures shall be provided in accordance with the approved APRX APPROXIMATE NIC NOT IN CONTRACT VA 22906 erosion control plan and shall be installed prior to any clearing, grading or other construction. - -- -- - - - EASEMENT x I5 EOF x 12 5 EOP EDGE OF PAVEMENT ELEVATION 4. All slopes and disturbed areas are to be fertilized, seeded and mulched. BC BACK OF CURB NTS NOT TO SCALE LEGAL REFERENCE & SOURCE OF TITLE: DB 4020 -569 5. The maximum allowable slope is 2:1 (horizontal: vertical). Where reasonably obtainable, BUILDING SETBACK x 155 x 125 SPOT ELEVATION - - -- lesser slopes of 3:1 or better are to be achieved. BFE BASEMENT FLOOR ELEVATION OC ON CENTER MAGISTERIAL DISTRICT RIO 6. Paved, rip -rap or stabilization mat lined ditch may be required when in the opinion of the C}- -- -. -��- BUILD TO LINE x 165 Tyr+! x 125 TW TOP OF WALL ELEVATION County Engineer, or designee, it is deemed necessary in order to stabilize a drainage BIT BITUMINOUS OH OVERHEAD SOURCE OF BOUNDARY SURVEY: DOMINION ENGINEERING channel. 7. All traffic control signs shall conform with the Virginia Manual for Uniform Traffic BK BACK PE POLYETHYLENE ' ZONING LINE x 165 B x 125BW BOTTOM OF WALL ELEVATION SOURCE OF TOPOGRAPHY: DOMINION ENGINEERING RAP Control Devices. 8. Unless otherwise noted all concrete pipe shall be reinforced concrete pipe -Class III. BM BENCHMARK PERF PERFORATED r ' I TEST PIT LOCATION BORING LOCATION / 9. All excavation for underground pipe installation must comply with OSHA Standards for LIMIT OF DISTURBANCE THIS PROPERTY DOES NOT APPEAR TO BE LOCATED WITHIN A FLOOD PLAIN. IT APPEARS TO LIE IN ZONE X the Construction Industry (29 CFR Part 1926). 10. All retaining walls are subject to separate permit approval. BS BOTTOM OF SLOPE PROP PROPOSED 0 BENCHMARK AS SHOWN ON FEDERAL EMERGENCY MANAGEMENT AGENCY FIRM MAP #51003CO140D DATED FEBRUARY 4, 2005 - FLOODPLAIN LIMIT THIS PROPERTY IS NOT LOCATED WITHIN A RESERVOIR WATERSHED. GENERAL CONSTRUCTION NOTES FOR STREETS: CB CATCH BASIN PRVD PROVIDED IRON FOUND 1. Prior to any construction within any existing public right -of -way, including connection to - - -- Bz az BUFFER ZONE BENCHMARK - TOP OF EXISTING DROP INLET 'ST -3" ON NORTHWEST CORNER OF SITE = 586.07* any existing road, a permit shall be obtained from the Virginia Department of CC12 ACCESSIBLE CURB RAMP PWW PAVED WATER WAY RIdA RMA *DATUM: NAND 1988 Transportation (VDOT). This plan as drawn may not accurately reflect the requirements - RMA - RESOURCE MANAGEMENT AREA UD UD UNDERDRAIN of the permit. Where any discrepancies occur the requirements of the permit shall CENTER LINE RCP REINFORCED CONCRETE PIPE WATER SOURCE: ALBEMARLE COUNTY SERVICE AUTHORITY govern 2. Construction inspection of all proposed roads within the development will be made by the RPA -- - - ----- RPA RPA - RESOURCE PROTECTION AREA DRAINAGE LINE County. The contractor must notify the Department of Engineering (296- 5861) 48 hours CL CHAIN LINK REM REMOVE SEWER SERVICE: ALBEMARLE COUNTY SERVICE AUTHORITY in advance of the start of construction. - RD RD ROOF DRAIN 3. All materials and construction methods shall conform to current specifications and CMP CORRUGATED METAL PIPE REQD REQUIRED EDGE OF GRAVEL THIS PROPERTY IS ZONED: PD -MC standards of VDOT. All excavation for underground pipe installation must comply with °'s °S SEWER LINE THIS PROPERTY IS SUBJECT TO PROFFERS, AND A CODE OF DEVELOPMENT PER ZMA 2001 -00020 OSHA Standards for the Construction Industry (29 CFR Part 1926). CONC CONCRETE RET RETAIN - - EDGE OF PAVEMENT b. x...w - B - 4. Erosion and siltation control measures shall be provided in accordance with the approved GROSS RESIDENTIAL DESNSITY: 15.57 UNIT /ACRE (AREA USED TO COMPUTE DENSITY INCLUDES ONLY THE BLOCK C4 SITE AREA.) erosion control plan and must be installed prior to any clearing, grading or other CY CUBIC YARDS RT RIGHT CG -2 CG -2 -- r0 - TD TRENCH DRAIN construction. - STANDARD 6" CURB PROPOSED ADT: 203 VPD (PROJECTED) 5. Upon completion of fine grading and preparation of the roadbed subgrade, the contractor shall have CBR tests performed on the subgrade soil. Three (3) copies of the test results C / C CENTER TO CENTER R RIGHT OF WAY CG 3 CG -3 " �'+ w WATER LINE 29 SFA UNITS X 7 VPD/UNIT shall be submitted to the County. If a subgrade soil CBR of 10 or greater is not STANDARD 4 CURB obtainable, a revised pavement design shall be made by the design engineer and C &G CURB AND GUTTER R &D REMOVE AND DISPOSE CO-6 CG -6 -- -- -- 4 "FP FIRE PROTECTION LINE submitted with the test results for approval. _._...__._._ COMBINATION 6" CURB & GUTTER CURRENT USE: VACANT 6. All slopes and disturbed areas are to be fertilized, seeded and mulched. The maximum DIA DIAMETER R &R REMOVE & RESET CG '7 CG -7 - x'Drr 2 °Dw- WATER SERVICE LINE PROPOSED USE: TOWNHOMES (29 UNITS) allowable slope is 2:1 (horizontal: vertical). Where reasonably obtainable, lesser slopes of 4:1 or better are to be achieved. EL ELEVATION SD SIGHT DISTANCE _ _ ---- COMBINATION 4" CURB &GUTTER 7. Surface drainage and pipe discharge must be retained within the public right -of -way or within easements to acceptance by VDOT. All drainage easements to be '� FIRE LANE STRIPING -- ° ° GAS LINE MAXIMUM BUILDING HEIGHT: 35 prior outfoll are ELEV ELEVATION SQ SQUARE extended to a boundary line or a natural watercourse. The contractor shall field verify the -- °H' --- °HN - OVERHEAD ELECTRIC WIRE BUILD -TO -LINE: 0' -20' FROM EDGE OF SIDEWALK PER COD TABLE B length of all storm drainage pipe. 8. Guardrail locations are approximate. Exact length, location and appropriate end ES END SECTION STA STATION -- UGE UGE - UNDERGROUND ELECTRIC treatments will be field determined at the time of construction. Additional guardrail may 1` ARE BUILDING ENTRANCE SUBDIVISION SUMMARY: be required at locations not shown when, in the opinion of VDOT, the Director of EW END WALL SW SIDEWALK Engineering, or the Director =s designee, it is deemed necessary. Mien guardrail is 1 LD .4 LD LOADING DOCK "- °HT - °HT OVERHEAD TELEPHONE LINE BLOCK C4 SUBDIVISION 78,106 SF (1.794 ACRES) required, it shall be installed four (4) feet offset from the edge of pavement to the face of EX EXISTING SWEL SOLID WHITE EDGE LINE guardrail, and roadway shoulder widths shall be increased to seven (7) feet. 0 • BOLLARD - ucT - uGT - UNDERGROUND TELEPHONE LINE MEETING ST. R/W DEDICATION 2,241 SF (0.051 ACRE) Albemarle County Engineering & Public Works Policies July 1998, Revised 30 January 2003 EXIST EXISTING SWLL SOLID WHITE LANE LINE 9. Where urban cross sections are installed, all residential driveway entrances shall conform © D DUMPSTER PAD ----GAIV - - - - -. CATV- CABLE TV TiMBERWOOD BLVD. R/W DEDICATION 3,660 SF (0.084 ACRE) to VDOT CG -9(A,B or C). 10. Where rural cross sections are installed, all residential driveway entrances shall conform FDN FOUNDATION TBA TO BE ABANDONED RESIDUE OF TMP 32 -41L 166,025 SF. (3.812 ACRES) to VDOT standard PE -1. 11. Paved, rip-rap or stabilization mat lined ditch may be required to stabilize a drainage FFE FINISHED FLOOR ELEVATION TBR TO BE REMOVED __ -o- - SIGN DRAIN INLET channel when In the opinion of VDOT the Director of Engineering or the Director=s TMP 32 -41L 250,034 SF (5.74 ACRES) 100% 84,009 SF. (1.929 ACRES) 100% LAND SCHEDULE: PRE - DEVELOPMENT (SF) % POST- DEVELOPMENT (SF) % LOTS 0 0 50,857 SF 60.5 R/W DEDICATION 0 0 5,901 SF 7.0 OPEN SPACE A 0 0 6,595 SF 7.8 OPEN SPACE B 0 0 3,261 SF 3.9 OPEN SPACE C 0 0 1,094 SF 1.3 OPEN SPACE D 0 0 1,714 SF 2.1 PRIVATE ROAD ALLEY 0 0 14,587 SF 17.4 VACANT LAND 84,009 SF. (1.929 ACRES) 100 0 SF 0 TOTAL 84,009 SF. (1.929 ACRES) 100% 84,009 SF. (1.929 ACRES) 100% OPEN SPACE TABULATION IMPERVIOUS PERVIOUS TOTAL % PERVIOUS IRON SET OPEN SPACE A 1,313 sf 5,282 of 6,595 sf 80.0 OPEN SPACE B 300 sf 2,961 sf 3,261 sf 90.8 OPEN SPACE C -- 1,094 sf 1,094 sf 100 OPEN SPACE D -- 1,714 sf 1,714 sf 100 TOTAL 1,613 sf 11,050 sf 12,663 sf 87.3 IMPERVIOUS AREAS: ROADS/PARKING AREAS: 27,640 SF CONCRETE WALKS: 6,826 SF PROPOSED BUILDINGS: 26,400 SF TOTAL IMPERVIOUS AREA: 60,866 SF PARKING TABULATION FOR TOWNHOUSES: REWIRED PARKING: 2 SPACES PER UNiT PLUS 1 SPACE PER 4 UNITS FOR GUEST PARKING 29 TOWNHOUSES X 2 SPACES + 29 TOWNHOUSES X (1 SPACE /4 UNITS) _ 66 PARKING SPACES REQUIRED TOTAL PROVIDED PARKING FIND TOWNHOUSES: 27 UNITS X 2 GARAGE SPACE = 54 2 UNITS X 1 GARAGE SPACE = 2 29 UNITS X 1 PARKING SPACE = 29 85 PARKING SPACES PROVIDED RECREATION ARE REQUIRED: 200 SF / UNIT -> 200 x 29 UNITS = 5,800 SF RECREATION ARE PROVIDED: 6,595 OK OPEN SPACE IS TO BE OWNED AND MAINTAINED BY A HOMEOWNERS ASSOCIATION. ALL PRIVATE STREETS ARE TO BE PRIVATELY OWNED AND MAINTAINED designee, it is deemed necessary. 12. A minimum dear zone of ten (10) feet from the edge of pavement shall be maintained on all residential subdivision streets. Additional dear zone may be required depending on the category of road design. 13. Compliance with the minimum pavement width, shoulder width and ditch sections, as shown on the typical pavement section detail, shall be strictly adhered to. The cross slope shall be maintained as shown on the plans. Exceptions will not be allowed. 14. All required signs (stop, street name, speed limit signs, etc.) are to be furnished and Installed by the developer prior to acceptance Signs and their installation shall conform to "Albemarle County Road Naming and Property Numbering Ordinance and Manual" and the Virginia Manual for Uniform Traffic Control Devices. The locations of all signs are shown on the plans. The developer shall be responsible for maintenance of the signs until the roads have been accepted into the state secondary road system. The speed limits to be posted on speed limit signs are to be determined by VDOT prior to acceptance. The speed limit is to be posted 5mph below the design speed. 15. Road plan approval Is subject to final subdivision plat validation. Should the final plat for this project expire prior to signing and recordation, then approval of these plans shall be null and void. 16. Traffic control or other regulatory signs or barricades shall be installed by the developer when, in the opinion of the Director of Engineering, or the Director's designee, they are deemed necessary in order to provide safe and convenient access. 17. Use VDOT standard CD -1 or CD -2 underdrains under the subbase material at all cut and fill transitions and grade sag points. 111 A video camera inspection is required for all storm sewers and culverts that are deemed inaccessible to VDOT inspections and are to be accepted into VDOT's maintenance program and ownership. The video inspection shall be conducted in accordance with VDOT's video camera inspection procedure and with a VDOT and /or County inspector present. In addition, if high - density polyethylene (HDPE) pipe or pipe system is installed, the contractor and a representative from the pipe manufacturer should hold a preconstruction meeting for installation training. GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS: 1. The plan approving authority must be notified one week prior to the pre - construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regulations VR 625 -02 -00 Erosion and Sediment Control Regulations. 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. 4. A copy of the approved erosion and sediment control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off -site borrow or waste areas), the contractor shall submit a supplementary erosion control plan to the owner for review and approval by the plan approving authority. 6. The contractor is responsible for installation of any additional erosion control measures necessary to prevent erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and during site development until final stabilization is achieved. 8. During dewatering operations, water will be pumped into an approved filtering device. 9. The contractor shall inspect all erosion control measures periodically and after each runoff producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken to an approved waste area. Earth fill shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.211 13. All inert materials shall be transported in compliance with section 13 -301 of the Code of Albemarle. 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:00pm. 15. Borrow, fill or waste activity shall be conducted in a safe manner that maintains lateral support, or order to minimize any hazard to persons, physical damage to adjacent land and improvements, and damage to any public street because of slides, sinking, or collapse. 16. The developer shall reserve the right to install, maintain, remove or convert to permanent stormwater management facilities where applicable all erosion control measures required by this plan regardless of the sale of any lot, unit, building or other portion of the property. 17. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75 Ibs /acre, and in the months of September to February to consist a 50/50 mix of Annual Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye, or May through August to consist of German Millet. Straw mulch is to be applied at BINbs /100sf. Alternatives are subject to approval by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90lbs /1000sf, incorporated into the top 4-6 inches of soil. Fertilizer shall be applied at 100INbs /acre and consist of a 10 -20-10 nutrient mix. Permanent seeding shall be applied at 180lbs /acre and consist of 95% Kentucky 31 or Tall Fescue and 0 -5% Perennial Ryegrass or Kentucky Bluegrass. Straw mulch is to be applied at 80lbs /100sf. Alternatives are subject to approval by the County erosion control inspector. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repair immediately. Silt traps are to be cleaned when 50% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded when necessary to achieve a good stand of grass. Silt fence and diversion dykes which are collecting sediment to half their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no longer needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordinance section 17- 204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (9) months after the date the land disturbing activity commences. (Water Protection Ordinance section 17 -2078) GTD GRADE TO DRAIN TC TOP OF CURB IFIRON FOUND TS TOP OF SLOPE IS IRON SET TYP TYPICAL LA LANDSCAPE AREA UG UNDERGROUND LOD LIMIT OF DISTURBANCE VESCHVA. E &S CONTROL HANDBOOK LF LINEAR FEET YDS YARDS LT LEFT I C) UTILITY c ° ARV AIR RELEASE VALVE MH MANHOLE BOA BLOW OFF ASSEMBLY PVC POLYVINYL CHLORIDE CO CLEANOUT RIM RIM ELEVATION CTV CABLE TELEVISION SAN SANITARY DI DROP INLET SCC STORMWATER CONVEYANCE CHANNEL DIP DUCTILE IRON PIPE SD STORM ELEC ELECTRIC STR DRAINAGE STRUCTURE FH FIRE HYDRANT TSV TAPPING SLEEVE & VALVE FM FORCE MAIN UP UTILITY P OLE F &C FRAME AND COVER WL WATER LINE F &G FRAME AND GRATE WM WATER METER GT GREASE TRAP WV WATER VALVE GV GATE VALVE 6 "V 6" VALVE HDPE HIGH DENSITY POLYETHYLENE INV INVERT STEEL GUARDRAIL - - - -- �-.- n WOOD GUARDRAIL -- ._... x -- 312 -300 L N1-� &I VAN C CONTRACTOR'S COORDINATION RESPONSIBILITIES 1. THE CONTRACTOR IS REQUIRED TO OBTAIN ANY /ALL PERMITS REQUIRED FOR CONSTRUCTION OF THESE PLANS. 2. ANY TIME 'WORK IS PERFORMED OFF -SITE OR WITHIN AN EXISTING EASEMENT, THE CONTRACTOR IS TO NOTIFY THE HOLDER OF SAID EASEMENT AS TO THE NATURE OF PROPOSED WORK AND TO FOLLOW ANY GUIDLEUNES OR STANDARDS WHICH ARE ASSOCIATED MATH OR REFERENCED IN THE RECORDED EASEMENT.. 3. THE CONTRACTOR IS TO CHECK THAT ALL EASEMENTS, LETTERS OF PERMISSION, ETC, ARE RECORDED /OBTAINED PRIOR TO THE START OF ANY CONSTRUCTION. 4. CONTRACTOR TO VERIFlY ALL SITE PLANS AND PROFILES AND DETAILS FOR CONSISTENCY AND IF CONFLICTS EXISTS, CONTACT ENGINEER FOR CLARIFICAi1ION AND /OR DIRECTION. INTERPRETATiON DETERMINED BY CONTRACTOR SHALL BE DONE AT HIS/HER OWN RISK. 5. THE CONTRACTOR IS TO VERIFY THAT THE RELOCATION OF ALL EXISITiNG UTILITIES IN CONFLICT WITH PROPOSED WORK HAS BEEN COMPLETED INCLUDING UTILITY POLES. 6. CONTRACTOR SHALL COMPLY WITH FENCING AND TREE PRESERVATION SIGNAGE REQUIRED BY ALBEMARLE COUNTY CODE 7. CONTRACTOR SHALL NOT RELY SOLELY ON ELECTRONIC VERSIONS OF PLANS, SPECIFICATIONS, AND DATA FILES THAT ARE OBTAINED FROM THE DESIGNERS;, BUT SHALL VERIFY LOCATION OF PROJECT FEATURES IN ACCORDANCE WITH THE PAPER COPIES OF THE PLANS AND SPECIFICATIONS THAT ARE SUPPLIED AS PART OF THE CONTRACT DOCUMENTS. 8. CONTRACTOR SHALL COMPLY WITH ALL WETLAND PERMIT REQUIREMENTS, IF A PERMIT EXISTS. 9. CONTRACTOR SHALL BE RESPONSIBLE FOR ALL RELOCATIONS, (UNLESS OTHERWISE NOTED ON PLANS) INCLUDING, BUT NOT LIMITED TO, ALL UTILITIES, STORM DRAINAGE, SIGNS, TRAFFIC SIGNALS & POLES, ETC. AS REQUIRED. ALL WORK SHALL BE IN ACCORDANCE WITH GOVERNING AUTHORITIES REQUIREMENTS AND PROJECT SITEWORK SPECIFICATIONS AND SHALL BE APPROVED BY SUCH. ALL COST SHALL BE INCLUDED IN BASE BID. 10. CONTRACTOR SHALL CONTROL STORMWATER RUNOFF DURING CONSTRUCTION TO PREVENT ADVERSE IMPACTS TO OFF SITE AREAS, AND SHALL BE RESPONSIBLE TO REPAIR RESULTING DAMAGES, IF ANY, AT NO COST TO OWNER. PATH TREE LINE FENCE ----------- STONE WALL - - - - - - RETAINING WALL - - - - STREAM / POND / WATER COURSE - - - - DETENTION BASIN X SILT FENCE 12 00 /11 F02i�i�r�i�iM*' iIRMVIIRE MITI 0 DRAIN MANHOLE [ [ PLUG OR STUB G = FLARED END SECTION - - HEADWALL C� OO SEWER MANHOLE c° o° SEWER CLEANOUT ® WATER VALVE & BOX & FIRE HYDRANT ASSEMBLY ® tom WATER METER c� o WATER WELL CONTOUR o (INDEX CONTOUR j yR (PARKING COUNT (CROSSWALK ACCESSIBLE CURB RAMP (HANDICAP PARKING IVAN- ACCESSIBLE HANDICAP PARKING (CONCRETE PAVEMENT / SIDEWALK IRIPRAP NEW ASPHALT GRASS EC -2 BLANKET MATTING EC -3 TYPE A EC -3 TYPE B WETLAND GAS VALVE OM GAS METER MATCHLINE NOTES: 1. THE SIZE OF THE SYMBOLS MAY VARY FROM THOSE SHOWN. 2. ALL ABBREVIATIONS AND SYMBOLS SHOWN MAY NOT BE USED. 11. THIS PROJECT DISTURBS MORE THAN ONE ACRE OF LAND AND FALLS WITHIN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP), GENERAL CONSTRUCTION PERMIT (GCP) PROGRAM AS ADMINISTERED BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION (DCR) UNDER THE JURISDICTION OF THE EPA. PRIOR TO THE START OF CONSTRUCTION, THE CONTRACTOR SHALL FILE A GCP NOTICE OF INTENT WITH THE DCR AND PREPARE A STORMWATER PREVENTION PLAN IN ACCORDANCE WITH THE VSMP REGULATIONS. 12. CONTRACTOR SHALL COORDINATE WiTH ALL UTILITY COMPANIES FOR INSTALLATION REQUIREMENTS AND SPECIFICATIONS. 13. CONTRACTOR SHALL BE RESPONSIBLE FOR SITE SECURITY AND JOB SAFETY. CONSTRUCTION ACTIVITIES SHALL BE IN ACCORDANCE WITH OSHA STANDARDS AND LOCAL REQUIREMENTS. 14. ONTRACTOR SHALL DISPOSE OF DEMOLITION DEBRIS IN ACCORDANCE WITH APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS, ORDINANCES AND STATUTES. 15 EXISTING UTILITIES SHALL BE TERMINATED, UNLESS OTHERWISE NOTED, IN CONFORMANCE WITH LOCAL, STATE AND INDIVIDUAL UTILITY COMPANY STANDARDS SPECIFICATIONS, AND DETAILS. THE CONTRACTOR SHALL COORDINATE UTILITY SERVICE DISCONNECTS WITH THE UTILITY REPRESENTATIVES. GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS: 1. All dams and constructed :fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 2. Pipe and riser joints are to be watertight within stormwater management facilities. 3. For temporary sediment traps or basins which are'to be converted to permanent stormwater management facilities; conversion is not to take place until the site is stabilized, and permission has been obtained from the County erosion control inspector. 0 0 ELECTRIC MANHOLE EM ® ELECTRIC METER - - + LIGHT POLE 0) OO TELEPHONE MANHOLE Q D TRANSFORMER PAD O UTILITY POLE ,C ♦ GUY POLE MATCHLINE NOTES: 1. THE SIZE OF THE SYMBOLS MAY VARY FROM THOSE SHOWN. 2. ALL ABBREVIATIONS AND SYMBOLS SHOWN MAY NOT BE USED. 11. THIS PROJECT DISTURBS MORE THAN ONE ACRE OF LAND AND FALLS WITHIN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP), GENERAL CONSTRUCTION PERMIT (GCP) PROGRAM AS ADMINISTERED BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION (DCR) UNDER THE JURISDICTION OF THE EPA. PRIOR TO THE START OF CONSTRUCTION, THE CONTRACTOR SHALL FILE A GCP NOTICE OF INTENT WITH THE DCR AND PREPARE A STORMWATER PREVENTION PLAN IN ACCORDANCE WITH THE VSMP REGULATIONS. 12. CONTRACTOR SHALL COORDINATE WiTH ALL UTILITY COMPANIES FOR INSTALLATION REQUIREMENTS AND SPECIFICATIONS. 13. CONTRACTOR SHALL BE RESPONSIBLE FOR SITE SECURITY AND JOB SAFETY. CONSTRUCTION ACTIVITIES SHALL BE IN ACCORDANCE WITH OSHA STANDARDS AND LOCAL REQUIREMENTS. 14. ONTRACTOR SHALL DISPOSE OF DEMOLITION DEBRIS IN ACCORDANCE WITH APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS, ORDINANCES AND STATUTES. 15 EXISTING UTILITIES SHALL BE TERMINATED, UNLESS OTHERWISE NOTED, IN CONFORMANCE WITH LOCAL, STATE AND INDIVIDUAL UTILITY COMPANY STANDARDS SPECIFICATIONS, AND DETAILS. THE CONTRACTOR SHALL COORDINATE UTILITY SERVICE DISCONNECTS WITH THE UTILITY REPRESENTATIVES. GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS: 1. All dams and constructed :fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 2. Pipe and riser joints are to be watertight within stormwater management facilities. 3. For temporary sediment traps or basins which are'to be converted to permanent stormwater management facilities; conversion is not to take place until the site is stabilized, and permission has been obtained from the County erosion control inspector. 0 •- - - -.■i man • iiiiw�� .■ ■A. e� • D � m 0 w Y U w U o �E� E LL; N N w E C 41 ova O N m ,C z w � L -v .� 0 I C) E c ° U W U 0 46 F- -�--II E-1 a •- - - -.■i man • iiiiw�� .■ ■A. e� • D � m 0 w Y U w U INDEX TITLE: ES2 SHEET NO: 2 OF 8 DATE: 08/13/13 LL; w m ca 41 z z w � F-'-i E i 0 I C) y O_ ° U U U r/] 46 F- -�--II E-1 a � U Z U U U m 0 w o E- 0 U) w 1-'w -i H W o Ili C) INDEX TITLE: ES2 SHEET NO: 2 OF 8 DATE: 08/13/13 LL; 0 41 z w � F-'-i E i w I C) y O_ ° U U U r/] 46 F- -�--II E-1 a � Z U U U ZO U2 INDEX TITLE: ES2 SHEET NO: 2 OF 8 DATE: 08/13/13 LL; z w � F-'-i E i w I iZ J � C'2 C,3 w INDEX TITLE: ES2 SHEET NO: 2 OF 8 DATE: 08/13/13 F-'-i E i w iZ � o a w 46 F- -�--II E-1 a � Z �-I --nil E- eV 1 1-'w -i H W o Ili C) W W W rn DOM. PROJECT NO:13.0018 INDEX TITLE: ES2 SHEET NO: 2 OF 8 DATE: 08/13/13 A/ // / + \\ , li I I I I I I ° g1A � _ � I � •• I �1 'I I � I I \ \ I _ i Ili iII i'il`•.i \, illi � I 11 __I�� - i % j I � II I i I (t II I�1 I •' � ' - - �^ ! I -4, I, I II II 1 I 1 1' � � i{ I I ., I I.• �' II II � i I _ 1 ------ ' i I I , 1 p7-. III al TMP 32B -A / ! / Tribal Properties, LLC / p Zone: NMD I� I ! i 1 1 I % it , � , I i 1 >. \\ � � .-� sre - Use: Vacant t I } // / III i I \`'•� ,/' / /' � I I i i l . i !/ �\ I """ -- �S 1 � _ //\ I l l i I I \ I S-AN.- SEWER, 0 1 \ BE ABANDO E� `\ I I ' AND FILLE TH - = / I I i I I ,' / � / , / i , •�. 580 -- _- FLOWABLE FILIILi. I I� RTION1F;_46 '-6 O JCrRB 582 _ , . \ :o '� TO B M 0 VF_D / z1_ 3 I \ / I � Line Table Line Direction Length Lt S 52'37'30" E 10.22' L2 S 37'22'30" W 12.34' L3 N 6'41'41" W 57.54' L4 N 35'15'11" W 17.47' L5 N 83'18'19" E 10.75' L6 S 69'58'46" E 36.89' L7 N 62'01'46" W 10.57' L8 N 83'18'19" E 101.26' Curve Table Curve Length Radius Delta Chord Tangent Chord Bearing C1 363.94' 454.00' 45'55'49" 354.28' 192.39' N 20'44'18" W C2 39.27' 25.00' 90'00'00" 35.36' 25.00' S 42'46'24" E C3 60.56' 417.50' 8'18'40" 60.51' 30.33' S 83'37'04" E C4 29.99' 19.50' 88'07'11" 27.12' 18.87' N 56'28'41" E C5 17.10' 182.50' 5'22'02" 17.09' 8.55' N 9'44'04" E C6 65.81' 197.50' 19'05'30" 65.51' 33.21' N 19'23'47" E C7 130.36' 1030.50' 7'14'52" 130.27' 65.27' S 47'30'47" W C8 75.63' 46.50' 9311'38" 67.57' 49.17' S 89'41'58" W / ! / f/ / / TMP 32 -402 / Edlich Drive Realty, LLC f / Zone: LI Use: Warehouse I iII i II 1 iI f'-- _` \ -• =-;- _- \\ -- � __ I / ' __ - -- `-- -- - - - - -- - - - - -- _ -_ to TMP 32 -41 - \ - -- _-_ - - - - - - -- - Turner, David P &The Market Place _Z_ / _ - - Zone: RA I i t III I I I t 1 I i \\� \\\ ♦ - I 1 \�\ / / - - -- ',\ \�'��\��`�����- ��� \`\ Use: Residential \_/ J 1 \ \ \ \ \ \ \ \ \ \ TMP 32 -41L \• \ / } J!, /, / / Post` Office Land Trust I \ \ \ ♦ \ \ i t 1 none: PD -MC \ ♦ \ \ \ I / I \ \ &m: Vacant Cl ' `/8 STUBQUT TOIAE AB /ANDgNED./' ' REMOVE,/VALVE/ (YAP CROS�. / ACCESS EASEMENT + DB 3265 -73 i I \ \ \ \ / �/. \\ \\ \ \\ DRAKAQE \E�EMEN7 el Park , I \ DB 32krr, \ / ; , / ' 1 SA SEWER MH / 67F !' / REMO E EX. 8 5TORNJ �, / TOAE RE VED / \ 4 6 T0- BE ABANDON�B. _ SEW AND / REPI�ACEg' / ! / \ - /!! st TMP e Land crust WIT 24" WDPE i l' MOVE CONS SECTION PORTION OF EXIST! DRAINAGE \ w / / / / p Office / f ( AND FILL fTH STONE. -EASEMENT TO B VACATED Zone: PD, -ffC ,- \ \\ l ' ' Use: Res1,dentia( EX. TREES' TO PORTION \ SANITARY ST�Rv1 DRAIN /;- 1�i1ANHOLE TO BE /REMOVED r �£ I REMAIN SEER EASEMENT / TMP'32B- 0f- 101A/' / /' /' ' I ' / TM DRAIN DB 3265 -73 E�f(. TREES TO /PORTION OF CG CURB - / / / , / / ' �- - / �' TO BE REMOVED �•- \ � � !/ 1 \ ,,' ,/ / , , ,/ /, /, /, �/ ,_. ; Trib�l Propy'rties, L`LC / , , ! + \ EP�SEMENT ! TO BE VAC�`TED BE REMOVED/ Zon F NMD/ / / / ' w--� / � // � WATER EASEMENT ! / !' // 1 ( , �°. Wow 4 1 // ; / �� j - -- ;; \ DB 32,5 -73 Use: �eside ttial / / / r � \ _ J 1 + ) / EX. CGS 12 TO / EAS ENA WATERS /EAR MENT \_AK Ny IN \% lb TMP 41Q \ / .,� The Daynel Croup, Inc. 8,. /r / / /!t !/ /� / T ` / __w � IN, ice,/ / /4 PD -MC / / / / ! /// / �• ` �/ K i / Use: Residential 0\ � � � _ \ �' ,/ ,�'• /,'!!! , \�' � �'s /' I �' \ EX. STM DfAIN / EASEMENT I ! \ i:. EX. CONC. P, : / \ / ..., < i SIDEWALK 4f,, � � 1 I I i ti � i 1 � I i I I I IIiI I I J,l / ! \ \ \ \ \\ -- 3 i! .. / / /. • I �/ /, - - -- � / / � i I , \ \ I / i 1 III II ___ - / \ I_ 1 3 •:.e/ \ �,•..;.. / ! / / I \ ( I t \ , 3 \ \\ \ \ ` \ I �\ I I / I i I i l l l it i \\ r -- -' _ _/ ` / \ / \ \ 1 ��. J ' � • / / /' I / I / � , / /� \ y \ 1 I + \ . I i i ( / • - _ /' / / J I � / \ \ '-, ' \ � 1 ` 1 \ \ . � , � F :' I / / /'i i' � � \ 1 / �i " / / 1 \., � / ,- /" m � / / -- - - - - -- � TMP 3,2/ 4 1 K e ewoo -Rd Villag f- \� \\ (I 1 40 �6' „' 4,6 // ! 80 /' 120 ffdty'm,ead \� \ PD -MC \ \ !: Use: Residential / SOLE: 1 = /49%// w, T //W MICHA L . MYERS Li . No. 33028 Id "AQNAL r SE E C a m� A ti 6�ry °a 0 N� OQ �u p m •E Q c z W W W 0 0 0 1-m w, T //W MICHA L . MYERS Li . No. 33028 Id "AQNAL r SE m z 0 m 0 W Z c� W 0 :4I 8'd LLI A OQ p m Q i� z W W 0 1-m w .-� 112 d� Y O E LU O _j 0 m z 0 m 0 W Z c� W 0 :4I DOM. PROJECT NO:13.001 INDEX TITLE: ES3 SHEET NO: 3 OF 8 DATE: 08/13/13 8'd LLI OQ p 0 Q i� z W W 1-m J_ .-� 112 d� LL O E O _j W CQ O co � U W w W co W 2 0 CD U 0 0 DOM. PROJECT NO:13.001 INDEX TITLE: ES3 SHEET NO: 3 OF 8 DATE: 08/13/13 8'd LLI OQ w Q i� z W W 1-m J_ .-� 112 d� LL DOM. PROJECT NO:13.001 INDEX TITLE: ES3 SHEET NO: 3 OF 8 DATE: 08/13/13 OQ w Q i� E i W O O E O W CQ W � W w W W 2 DOM. PROJECT NO:13.001 INDEX TITLE: ES3 SHEET NO: 3 OF 8 DATE: 08/13/13 EXISTING FOREBAY FOR/ / / i I I 578 • SWIVI #2 LO 00 B co 0. AF tl _ / / / I ! I ° �` . __- ► L UREL P R' UBDIVISIONi \ d I \ o EX. i 580 �_ NOTE: / � i I / / / CO[ TOQTO HA5 \O IAN T� USt�GkC LO 0 ENTRANCE WILL BE BUILT TO C6 FOR TO KPIJ P�SES� SUBJ T l� COMPLETION ONLY AFTER -- / / �. ► / APR VAIL BY C UI�`T�CS \IP�SPE6TOR \ \ POSITIVE DRAINAGE FROM THE _ �_- �,°' I wv Q DIVERSION DIKE TO THE SILT TRAP NO LONGER REQUIRED BY = =- �`�I -� _ —596 \ THE COUNTY E &S INSPECTOR. _ — - -�°`' / TMP 32 13 / / l 82 \ d I w � 3.811 Acres t bark Ln. l 8 "w a„ W / h'�p / Private street �-� „ \ \ \ \ \ \ / / LIMITS OF 8 w� ���. ' \ �-w \ \ \ X8" " TS &V cesse'rrnt. DISTURBANCE , -°� 8,, "• °-. \ \ \ \ \ / // / / o MIC T. MYERS 9 22.5° end i c n k�rc nc o.33028 [F \°" 8• -`' \ \ \ \ \ \` \ \ \ \ \ ~ / / / / .e _. . SideAo k . / ~.. /_ ° . ��� \ � \ _.. ---- -:. -- „__ ' ' . -� ... .. ' . m P r oP . �- ' fir^ , � • . - ' ' � :� � . ..- `•~-•-- ... -,-... .,.-� " " " " �� "` ~ '""r,.� \ \ � / / / � r 'T. 6 ...' X •� X ' , � s ' r ` . °' -., °„ �' . , `'� -•../ `".,° \ \ \ \`` \ l / . °/ �sS I ���1 won d ° \ s.qr oP DD 93 7 /4 95-z 9 /\ \ / / 1 / . '�''��: `'� � , � end � 9�.� 1 X38 AC. .. t� -12 � GG -11 �/ �.., \ ;, �• , ' d ` X. ance m VV / - ' /- a, / ' ° • j / O j Ode" Space IJ / r / 21'x4 , 1 i},Z�I CE �` `° \ \ �' \ / / w IP w >'c t _ 111 Sf l 21.0' ~�\ \. / r rig co rn , ! `L `�'rGa p �' Gj, ' / z z V L0 11.25° nc NOTE: Stop "x� \' m / , / garage / 5 Gone., i' Sig, `,��� \ v' m LOTS 24 -28 CAN BE ISSUED A 1 -� Gera W w Island {TYp•) '' �' ° -AGSA� water �`\ v� . A � / _ _ _ \ BUILDING .PERMIT ONLY AFTER / �..1�. � � � �, •, i � -+- - _�rara_ge THE SEDIMENT TRAP IS REMOVED \ to 7h . �'�• / 1 � \ . �,.:. � w � \ Corage Garage 97 -_ Gara AND AREA IS STABILIZED. CO L G= p 's _ _ -' = a�, - / ►�mo . ,/ �, / S' �3�', 6 8 o r�ctli�e .._`` ===:- � .• ~-� • U . • \ ' �''/ ` \ ' S 8"S 8,,S s V 1�a a ® uu `?U �v ate � � 1 734 n � w � o m c Lase, , O 20 Ste 13 + G1 61 \ , • , i, n Space - ��� cafe -� � _ � / % �; ��y� xoy •�'/ 3' Cone. (, o 21� - �`�- 20 x8 X12H laze Area — ,% ,� / ISIa Y®•) y ° , Z z �' -°' \ .s, � � � � n Top / C, o --,,, j / ~.. r,�-• •�-, � ,'',~ ./ / tee / Q` -�' � ~` ,��• °'� � � \•f / , Lot fir® 1 / °. U °. / / /' / / �\ :� •: '\ / / - - / / — \ d ° \ \ \ �" /` � � cr;- a \ js , \ \ � ' ACTIVE c \ �� V� � % � � ®� �, t •a� do / , `, 5 � , � � \ �/ \ � � c � ��/ � , / �,� 3 % � �� � . • / / � \� � A � v � v � S \ RECREATION 5 W Q �� /c REA 6, 59 / / / i ' /.'`�•` -�/ / `\ ' / � \ \ ' � 4° \ \ d �' ,� ���• � ! - °,,,, - ��°' ' nd k / � 'dT ` .•°.. /' �c'' r4 ,/ �i0�,, � qj [ .l'` `�' a\� 4 � t' ` W' � : v `'a~ '"` / o� o / �'�• . \5oa° ( (/ l ��. t 9 , ~/ y /' LIMITS OF �\ � / \\ \ \ \ 4 f \ ' � �� , f - � ~ DISTURBANCE / z ° r M` � i j / `� \ \ � \ ?. � �' X .rte � � 2r `^(j" .✓."° t ° G f �, rp— \ \ \ \ ' �k 6 5 <.�' mar/ / :(� „ E 5em n T �'C, /' 4 ," � % z .-� C z m / \� ° \ \ r�� 1 Irri ation V 1 wm 1 upper ~- ____ •• -' -8 (�V, ti , /S� ( ;°, q v /� ! / Q ✓ / ce Lin -6 ram GG_ 8 X8 1 /o y / D�\i 45' Be I� �. ,�, 3 �C •.,, �"�'�,'° �, d... ' / ,,� ° , / � 'rte �i .,e i • / / E &SC LEGEND [3.02] CONSTRUCTION ENTRANCE CE 3.05 SILT FENCE SIF 3.07 PROTECTION e 3.09 DIVERSION DIKE IS 3.11 TEMPORARY RIGHT-OF-WAY RWD [3.1]8 OUTLET PROTECTION OP [3.3]2 TEMPORARY SEEDING TS [3.32] PERMENENT SEEDING PS [3.3]5 MU MULCHING [3.3]9 DUST CONTROL DC [3.13] SEDIMENT TRAP ST ��� r - �` � �r � `,•` ` .:.. � r, • \ � � 6 . �r4��`� \ \ q�� C � ,,„ � ` '. , •� �.�, ,. / o //��e�,� �� (j'•q� \� � ,' s '/ — -_. _ 1� iii � F-•� �/ Bend �i� ` / /C� ,' Sl '� �' / w 1C:) P P \� \ \ \) \, � / O 121 g q��\\ d?� \ / �6 Grass // �� 4>�` �� �1a / ISIQnd (/Y S(�'� d \ I LIMITS OF ,�. / �� 3 Cone. 5 a / °'' a ' `\ �. `\ Island T� J � 1 . ' �� n, / , "Olt �� 6x4 Tree Grate ' � -� / � � W W O / DISTURBANCE - ` / o . / \ ° ��`- . � `a �,� \\ 9 \ �a � ��, �" 0 Typical) 1 \ a / ' 4i rep \ o 'i{7� \\ / y 4 /'�R ,' ° ' I ~/ ACSA water \ � , '��` �, / .� r/ a': � � � / � � r�, �w•-� q. . i Easement �`� / cj , // l �$� A.4 �--' 0 I i Q 6,1 40 CQ `''` '.� '.� ° �°T�� O w w Pocket Park `- t"\\�"` DOM. PROJECT NO:13.0018 DD � \ \ (n� SF) INDEX TITLE: 16� N. Open Spdce 3',, 1 Sf �� a ° � d:° . 20 / 20 / � 40 60 ES4 / \ o° ° grrc. Sid °` °. / I ° .d' SCALE:X" = 20' SHEET NO: 4 OF 8 / DATE: 08/13/13 \ 10% SETTLEMENT = = = = = = == 0.3' FREE BOARD- 3' -0" - _ -- - - - - - -- -- - - -- 111 =- flllililili�`� llif11lfllilllililllflilil TYPICAL VEE- SHAPED DIVERSION V�nm u� CC 1 DIVERSION DETAIL DD ES5 Not to Scale 18„ TYPICAL GRAVEL STRUCTURE nni rri � mm�r� c�nrr TYPICAL EARTHEN STRUCTURE 6 TEMPORARY RIGHT -OF -WAY DIVERSION (RWD ES5 NOT TO SCALE Stone Construction Access 70' Min /- 3" SM -2A Asphalt Existing Pavement Existing Grade SECTION B -B Filter Cloth ,I.1 �t ►IT�4I 12' Min 2% Slope Positive Drainage To Sediment Trapping Device Filter Cloth SECTION A -A NOTE: A minimum water tap of 1" diameter must be installed with a minimum 1" ballcock shutoff valve supplying a wash hose with a diameter of 1.5" for adequate constant pressure. Wash water must be carried away from the paved construction entrance to an approved settling area to remove sediment. All sediment shall be prevented from entering storm drains, ditches, or watercourses. 2 Paved Construction Entrance CE. ES5 Not to Scale (WITHOUT WIRE SUPPORT) 2. EXCAVATE A 4" x 4" TRENCH 1. SET THE STAKES UPSLOPE ALONG THE LINE OF STAKES. MAX �^ 4t 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACTF THE EXCAVATED SOIL. r FL3M � G SHEET FLOW INSTALLATION POINT A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) 3 SILT FENCE DETAIL (SF) ES5 Not To Scale GENERAL CONSTRUCTION NOTES 1. Prior to any construction within any existing public right -of -way, including connection to any existing road, a permit shall be obtained from the Virginia Department of Transportation (VDOT). This plan as drawn may not accurately reflect the requirements of the permit. Where any discrepancies occur the requirements of the permit shall govern. 2. All materials and construction methods shall conform to current specifications and standards of VDOT unless otherwise noted. 3. Erosion and siltation control measures shall be provided in accordance with the approved erosion control plan and shall be installed prior to any clearing, grading or other construction. 4. All slopes and disturbed areas are to be fertilized, seeded and mulched. 5. The maximum allowable slope is 2:1 (horizontal: vertical). Where reasonably obtainable, lesser slopes of 3:1 or better are to be achieved. 6. Paved, rip -rap or stabilization mat lined ditch may be required when in the opinion of the County Engineer, or designee, it is deemed necessary in order to stabilize a drainage channel. 7. All traffic control signs shall conform with the Virginia Manual for Uniform Traffic Control Devices. 8. Unless otherwise noted all concrete pipe shall be reinforced concrete pipe - Class III. 9. All excavation for underground pipe installation must comply with OSHA Standards for the Construction Industry (29 CFR Part 1926). 10. Proposed staging and contractor parking areas will be within the proposed limits of disturbance. CONSTRUCTION SEQUENCE 1. Construction entrance will be constructed. 2. The silt fence and inlet protection on existing curb inlets will be installed as indicated. 3. Diversions and the sediment trap will be installed as indicated. 4. Storm sewer will be installed and inlet protection provided as indicated. 5. The remaining storm sewer structures will be placed and the inlet and outlet protection will be installed as indicated. 6. Site grading, utilities and access /parking areas will be constructed. 7. Dust control measures and permanent seeding along the graded areas of the site will prevent further erosion while construction is taking place. 8. Sediment trap 1 will be removed. Construction in that area shall be completed. 9. Stabilize site and remove remaining E&SC measures. / r GRAVEL FILTER RUNOFF WATER o d SEDIMENT CONCRETE GUTTER �Illlllj� II d G _ Q 12" SPECIFIC APPLICATION MESH M WATER a a 0 d 4 e A I� CURB INLET IF THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. * GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. GRAVEL CURB INLET PROTECTION DETAIL 11P NOT `I'0 SCALE GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1. The plan approving authority must be notified one week prior to the pre- construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regulations VR 625 -02 -00 Erosion and Sediment Control Regulations. 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. 4. A copy of the approved erosion and sediment control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off -site borrow or waste areas), the contractor shall submit a supplementary erosion control plan to the owner for review and approval by the plan approving authority. 6. The contractor is responsible for installation of any additional erosion control measures necessary to prevent erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and during site development until final stabilization is achieved. 8. During dewatering operations, water will be pumped into an approved filtering device. 9. The contractor shall inspect all erosion control measures periodically and after each runoff producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken to an approved waste area. Earth fill shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13 -301 of the Code of Albemarle. 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours OF 8:00am to 9:00pm. 15. Borrow, fill or waste activity shall be conducted in a safe manner than maintains lateral support, or order to minimize any hazard to persons, physical damage to adjacent land and improvements, and damage to any public street because o slides, sinking, or collapse. 16. The developer shall reserve the right to install, maintain, remove or convert to permanent stormwater management facilities where applicable all erosion control measures required by this plan regardless of the sale of any lot, unit, building or other portion of the property. 17. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75 Ibs /acre, and in the months of September to February to consist a 50/50 mix of Annual Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye, or May through August to consist of German Millet. Straw mulch is to be applied at 80lbs /100sf. Alternatives are subject to approved by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90lbs /1000sf, incorporated into the top 4 -6 inches of soil. Fertilizer shall be applied at 1000lbs /acre and consist of a 10 -20 -10 nutrient mix. Permanent seeding shall be applied at 180lbs /acre and consist of 95% Kentucky 31 or Tall Fescue and 0 -5% Perennial Ryegrass or Kentucky Bluegrass. Straw mulch is to be applied at 801bs /100sf. Alternatives are subject to approved by the County erosion control inspector. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. A ny damage or clogging to structural measures is to be repair immediately. Silt traps are to be cleaned when 50% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded when necessary to achieve a good stand of grass. Silt fence and diversion dykes which are collecting sediment to half their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no longer needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordinance section 17 -204G) 22. Permanent vegetaion shall be installed on all denuded areas within nine (9) months after the date the land disturbing activity commenced. (Water Protection Ordinance section17 -20713) TEMPORARY SEDIMENT TRAP CALCULATIONS N s _ N N z Z WEIR LENGTH DRAINAGE AREA WET VOL. D1 WET VOL. . Y VOL. D2 DRY VOL. °' A B C H (ft.) ({t.) (ft.) (Acres) (REQ.) (ft) (PROV) ..) (REQ (ft.) (PROV.) W 0 Q (CF) (CF) (CF) (CF) 1 585.0 588.0 590 2.5 3 6 1.38 2,497 3.0 2,835 2,497 2.0 3255 ri Acc I PIPPAP AREA �V OUTLET (PERSPECTIVE VIEW) * *COARSE AGGREGATE SHALL BE VDOT #3, #357, OR #5. DRY VOLUME ORIGINAL EL = B AREA GROUND ELEVATION WET VOLUME EL = A (EXCAVATED DIVERSION DIKE *NOTE: SEDIMENT TRAP SHALL NOT BE REMOVED BEFORE COUNTY INSPECTOR HAS DEEMED STABILIZED. 1 Z 1.0' ORIGINAL GROUND D2 -; H ELEVATION CROSS SECTION OF OUTLET FILTER CLOTH CLASS I * *COARSE RIPRAP AGGREGATE 5 TEMPORARY SEDIMENT TRAP DETAIL ES5 NOT TO SCALE h h 'e5 � A Lro. 33028 �o 1 7 O ° C Cn Pq w m r m 0 w z o c� z U„ w c0 eC M � A o Ci O •--1 O O ui J O U Z o O_ 117-1 1 �F4 A w U U U u..i Z w � J Z.1 CQ CO 144 LL V C' H co a W �o z � W � Q w�-+ o iu O W W �-I 2 07 DOM. PROJECT NO:13,001$ INDEX TITLE: ES5 SHEET NO: 5 OF 8 DATE: 08/13/13 s _ N N z • L 65 n ,L ui r c 0, 6, E C U 0 � o N m` s C .� �E C W 0 Q h h 'e5 � A Lro. 33028 �o 1 7 O ° C Cn Pq w m r m 0 w z o c� z U„ w c0 eC M � A o Ci O •--1 O O ui J O U Z o O_ 117-1 1 �F4 A w U U U u..i Z w � J Z.1 CQ CO 144 LL V C' H co a W �o z � W � Q w�-+ o iu O W W �-I 2 07 DOM. PROJECT NO:13,001$ INDEX TITLE: ES5 SHEET NO: 5 OF 8 DATE: 08/13/13 EXISTING FOREBAY FOR/ I ! 578 ° I ,° a ° "•`_`_..•..•_.___ — I I C�°> � 1 I I � I I , / \ \ \\ \ \ \ \ \ \ \ \\ \ \ \\ \ \ \ \ \ \ SWM #2 \ L0 z au \ n<r� CY: r ° / � �` / I I � I I I •" I \ c I I �—.ass_ I � �� \ \ W EX. / 580 L ( 3 - FUTURE REA /�0 EX M'H \ \ \ \ \ \ \ - , / / ° • ... a. � � / �."`r -••- , .�.� : • � - ---- � _- f--. —596 _ / FROM B � CK C6: \ \ � \ \ \ \ � \ \ \ / / p / / I .,~ 4 /�� / '— _" -W `\� -� / i/ w / A= 0.924Ac. \ \ \ \\ \\ // e5 / / \ 00 ,. 11 / -4 582 d T / Q AAAAA ST�6 \ YT •_•••_.�\ 8" W 8 "w� 8�w 8" w / / �- l \ \ \ \ \ \ \ \ \ \ \ \ �• \- - � �i // / �`� �'� x F Gr / � � / � r — /_. - -• W Cpl � / � 8'�/ � " � � \ \ \ \ \ \ \ � ,� . '/ / / / / � MIC J / / •.'' / / / / .. --•~'f � / / � l � - � . — • —— \ ,/ .. � ' � •a• .� '. ... �• . � \ �\ \ \\ \ \ \� \ \ \ � �, / / /� 3 / ' NDPE,� - ~,,... o \ - \ \ \ A TO EX STIR, 70:/ / / w X. ��� . �`\ >� \� • 1 A�0.43 Ac. °.� l i) r� �w ST -6 r ®d. / / \ ...�. � \ \ \ � C— 0:85 / / / . °/ SI ANAL E� / / \ / l / \ e a / , lam,-• ' / • / Acres / • a+ ® 8 �''`"`•.,..... 0.060 Acres 0. c=0. / / / 3 a — X. co ID 0 w Lu ry Z z � Stop a >- Sign /,,.:: � --:.- : /:.�-: -...• I / -- / .194 c— O. 85 10.0' m Lu T9 U) — l 590 co CV3 m qr W 0 x" ' " Acres ' / o /,•'" / / ' / ' m 0 CN C) c=O. 89 195 ° a t1 W z / / \\ A\ ' i "N \ / • 0. 4 8 (d 'A{i s Cr ja,77- "Al Lij / \ V. \ -� I \ / \ \ / z \A -h ^� / r Z l ! / `..1.+','a;:;:^•`T. ;" t.F�'_ 7 1-F _�, -� - \ \ \ ;:k a �� / , �� 112 M er LL". o z / / /// � /�V. ..-;� -.,- `� \. \ \ �-� / � \\ Y'• _6 \ o �1 Irrigotion FHA a // / ` � // ����•< ��' � \ � �'�. � � � rvice Line 3 / 0.403 Acres Ilk r✓l l //Ill / / / / / , , / a \ / / ° I I / �--� z �. ;A. o AN I w DOM. PROJECT NO:13.0018 INDEX TITLE: d o °:a . 20 / 20 / \40 60 ES6 o a °' SCALE:/1" = 20' / // / // SHEET NO: 6 OF 8 I / o ° e d ° ° d DATE: 08/13/13 610 605 600 595 590 585 580 575 570 565 560 EX. EX. T -6 C� 1 T -6 1 1 A C2 � C3� __- o _�- Obi .m. ---_- Lo Lo ....� -- o U-) -- _.._ J c 61 61 O N E ill . _ - It- M _ CL m _ ........ _ -- x __ _ __ X _,...__.----- .._.._.._ __ - -. —. �_ ---PROPOSED-GRADE E •c ■ ___.,.........._ .. _. __._.__._ c 24.33 -15 HDP -@ 37% _. EXIST. _ �GRA U w S . =4 _0_5 54— 68.79' -- 15 " -HD Clear —__.. �2. 8 %— 1.0' Min. U ..._.__ O ° _EgQPO�FD ....._._ U c co� ------ -__ - -- Clear - �STA 34.39.,_ 8 PVC" 1-+ 15 - HDPE -0 -1 AN XW- 1NG__. 4 51 -- w 57 -7 15 HOP �:.__. o _ - m - -- _._ A 3: -- _ _ _ --4�' - EXIS.L 45 3 '. — 15" -HDPE _Q= _313 .= - -- 8_P_VC Q - - I� - - - - -- - - -�_ _ - -� - - -� —a�— - — `�'------- I�LV.= 582..2 - - -- - ,� - - - - -- -- -- U co co___ cn_— _, Lo— Ln �._ W Z � – - -- —,_ N 00_ Lo - -- -- o _ Q C? ; - - -. - -- —_ a ___- :................ --- -- - -- > - - -- - -- - 0 +00 1 +00 c? cn 610 "I ZZ En Z 0 +00 1 +00 610 605 600 595 590 585 580 575 570 565 56C 8/ (4) U 5� STORM SEWER PROFILES HORIZ. SCALE: 1" =30' VERT. SCALE: 1 " =10' pp -- -- __LLj w .._ .......... -_lil Lo.. Fit �_.,,...._._.__ W }� 0) Lo -- o N- J c: c 61 61 O N E ill . _ - It- M _ CL Uj o`r� ._0- �_ �@ L E •c ■ E c W o 0 U w S U O ° _EgQPO�FD U c co� w 57 -7 15 HOP �:.__. _ - - - m - -- _._ A 3: --4�' - EXIS.L 45 3 '. — 15" -HDPE _Q= _313 .= . _- -- Q - - I� U m �._ W Z � – - -- —,_ N 00_ Lo - -- -- o _ Q C? ; - - -. - -- —_ a ___- :................ --- -- - -- > - - -- - -- - 0 +00 1 +00 STORM SEWER PROFILES HORIZ. SCALE: 1" =30' VERT. SCALE: 1 " =10' 1q,h e e 5� a MIC YERS Lic o.33028 toss l aN A L Ewe }� 0) � cV N co OQo0— c c: c 61 61 O N E W Uj o`r� 0 �_ �@ L E •c ■ E c W 0 1q,h e e 5� a MIC YERS Lic o.33028 toss l aN A L SHEET NO: 7 OF 8 DATE: 08/13/13 A m Y U w S U O ° U c co� w � W m A 3: Q I� U m W Z z° c? cn 610 "I A a o 605 0 .-+ o 0 600 595 co O w U O 590 U V U -" a 585 �W w U U U .93% 580 ii.i 575 1 w - C,2 J 570 565 560 ^ O rO O U 610 W U) W W 605 r�r I--�1 �i O 600 r-� H 595 O Q' H 590 F-1 585 580 W o Li 575 Q w w 570 a7 DOM. PROJECT NO:13.0018 565 INDEX TITLE: 560 ES6A SHEET NO: 7 OF 8 DATE: 08/13/13 STORM WATER MANAGEMENT NOTE: THE PREVIOUSLY APPROVED HOLLYMEAD TOWNCENTER REGIONAL POND "SWM #2" HAS BEEN DESIGNED TO PROVIDE DETENTION AND STORMWATER QUALITY TREATMENT FOR THIS SITE. THIS SITE IS REFERED TO IN THE HYDROLOGIC /HYDRAULIC CALCULATIONS AS "HTC - HURT FUTURE 2" AND USES A DESIGN GROUND COVER COEFICEINT (c) OF 0.85. REFER TO SHEETS FROM THE APPROVED SWM #2 AND DRAINAGE AREA MAPS ON THIS SHEET. THE OUTFALL PIPES HAVE BEEN SHOWN TO BE ADEQUATE. REFER TO THE LD -209 WORKSHEET ON THIS SHEET. APPROVED HYDROLOGIC /HYDRAULIC CALCULATIONS FOR STORM WATER MANAGEMENT FACILITY #2 NOT TO SCALE HYDROLOGIC /HYDRAULIC CALCULATIONS 11101M HOLLYMEAD TOWNCENTER STORM WATER MANAGEMENT FACILITY 2 August 29, 2003 Rev: December 11, 2003 Rev: May 13, 2004 Rev: June 4, 2004 Rev: September 2, 2004 Rev: September 22, 2006 LOCATION: Tax Map 36 Parcels 46 Albemarle County, Virginia PREPARED BY: Dominion Development Resources, LLC 172 S. Pantops Drive Charlottesville, VA 22911 P: 434.979.8121 F: 434.979.1681 111UI0*i1 Summary: 2 Pre - Development: Pre -Dev Flood Hydrographs: 3 -8 Post - Development: Analysis Flood Hydrographs: 9 -18 Routed Hydrographs: 19 -24 Combined Hydrographs: 25 -28 Outlet Structures: 29 -33 Reservoir: 34 NOTE: DA Maps & Land Use Maps are at the end of this report. Run -off Summary Point of Pre -Dev Pre -Dev Pre -Dev Post - Post -Dev Post -Dev Analysis DA 2 -Year 10 -Year Dev 2 -Year 10 -Year Grate Cross Cross No. DA Area Time 1 A 59.25 86.21 U & V 36.29 51.11 LD -229 DRAIN DESIGN ESV NOT TO SCALE ADEQUATE OUTFALL Line Inlet Drng Inlet i Runoff incr Q Q Q Inlet Curb Junct Gutter Grate Cross Cross No. ID Area Time Inlet Coeff Q Carry Capt Byp Eff Len Type Slope Width SI, Sw SI, Sx Dn Travel (ac) (min) (In/hr) (C) (cfs) (cfs) (cfs) (cfs) ( °I°) (ft) (ft) (ftift) (ft) (ftift) (ftift) 1 1 0.20 5.0 5.19 0.73 0.76 0.00 0.76 0.00 100 8.00 Curb 0.023 581.31 0.083 0.020 2 1A 0.17 5.0 5.19 0.89 0.79 0.09 0.87 0.00 100 6.00 Curb Sag 581.51 0.083 0.030 3 2 0.49 5.0 5.19 0.77 1.96 0.00 1.91 0.05 97 12.00 Curb 0.030 .... 0.083 0.020 4 3 0.40 5.0 5.19 0.80 1.66 0.00 1.62 0.04 98 12.00 Curb 0.042 .... 0.083 0.020 5 4 0.06 5.0 5.19 071 0.22 0.05 0.27 0:00 99 6.00 Curb 0.046 .... 0.083 0.020 6 5 0.37 5.0 5.19 0.82 1.58 0.00 1.52 0.05 97 12.00 Curb 0.053 .. 0.083 0.020 4 PROPOSED STORM INLET CALCULATIONS ES7 Line Inlet DnStm Drng Runoff Incr Total Inlet i Total Invert Invert Line Line Line Capae Vel Pipe No. ID Ln No Area Coeff CxA CxA Time Inlet Runoff on Up Length Slope Size Full Dn Travel (ac) (C) = 1.00 (min) (in/hr) (cfs) (ft) (ft) (ft) ( °l} (in) (cfs) (ft/s) (min) 1 1 outfall 0,20 Q.73 0.15 0.99 5.0 6,70 6,43 579.03 581.31 24.33 9.37 15 19,77 14,38 0.08 2 1A 1 0.17 0.89 0.15 0.85 5.0 6.70 5.51 581.51 583.36 26.13 7.08 15 17.18 6.45 0.10 3 2 2 0.49 0.77 0.38 0.70 5.0 6.70 4.59 583.56 584.99 68.79 2.08 15 9.31 5.97 0.30 4 3 3 0.40 0.80 0.32 0.32 5.0 6.70 2.114 585.19 589.98 34.39 13.93 1.5 24.10 3.21 0.33 5 4 Outfall 0.06 0.71 0.04 0.35 5.0 6.70 2.25 583.57 584.99 45.36 3.13 15 11.43 7.14 0.41 6 5 5 0.37 0.82 0.30 0.30 5.0 6.70 2.03 585.19 588.23 57.74 5.26 15 14.82 6.02 0.58 5 PROPOSED STORM DRAIN CALCULATIONS ES7 Storm Water Management Facility 2 Summary Storm water management facility 2 will serve as a regional detention facility for portions of Hollymead Town Center and the VDOT improvements to Airport Road. In addition the pond will provide water quality for the rear portion of Hollymead Town Center, Regional Service Area C. Drainage area `A' is the pre - development drainage area for the point of analysis and has a total area of 73.0 acres. Drainage area `U' is the post - development drainage area that will be routed through storm water management facility 2 and has a total area of 64 acres. Drainage area `V' is the post - development uncontained drainage from future developed areas that will not be routed through the pond and consists of 16.6 acres. The pond will have two separate outlet structures. The primary structure is designed to pass a majority of the flow and the secondary structure will serve as an emergency spillway for the 100 yr. event. The primary structure will consist of a 6' diameter concrete standpipe with a crest elevation of 559.00. The primary structure will be equipped with two orifices. Both orifices will have a diameter of 8" and an invert elevation of 556.00. The culvert for the primary outfall structure will consist of a 48" concrete pipe that will be outfitted with a concrete cradle for its entire length. The secondary emergency spillway structure will be a standard 4' manhole with a DI -3C top. The crest of the opening for the inlet will have an elevation of 559.25 resulting in a top elevation of 560.25. The culvert for the emergency spillway will consist of a 24' concrete pipe that will tie into the storm sewer system for the future extension of Deerwood Village Drive. The storm water facility will have a permanent pool water surface elevation of 556.00. During the 2yr storm event the pond will achieve a water surface elevation of 558.09 and have an outflow of 4.45cfs. During the 10yr storm event the pond will achieve a water surface elevation of 558.81 and have an outflow of 5.29cfs. During the 1 00y storm event the pond will achieve a water surface elevation of 559.64 and have an outflow of 50.89cfs. The combined flows for DA -V and DA -U Routed are 36.29cfs for the 2yr event and 51.11 cfs for the 10yr event. Rivanna Engineering & Surveying, PLC Page 2 (434) 984 -1599 Storm Water Management Facility 2 Post - Development Peak Flow Flood Hydrograph Report Name: DA -U Rational, 10yr > - 9 E o •A Type: Modified Rational A 0 4 ca [ HYDROGRAPH INFORMATION] 4 > U O Peak Flow (Qp) C = 208.63 (cfs) Time to Peak (Tp) � o = 15.00 (min) Time of Base ('Tb) - U M --�- -I = 37.50 (min) Volume O CD = 5.3899 (ac -ft) Time Step U = 1.00 (min) Flow Multiplier 0 = 1.00 [RATIONAL HYDROGRAPH INFORMATION] Flow Multiplier = 1.00 Receding Limb Factor U = 1.50 [APPROXIMATE STORAGE] Maximum Outflow X12 O = 0.00 (cfs) Maximum Storage = 5.3899 (cu ft) [BASIN INFORMATION] [WEIGHTED WATERSHED AREA] Description Area CN Runoff Coef ------------------------------------------------------------------ HTC - Hurt Future 1 10.5000 0 0.85 HTC - Hurt Future 2 10.8000 0 0.85 Church 4.3000 0 0.60 Post Office 12.0000 0 0.70 Airport Rd Improvements 2.7000 0 0.90 Future Commercial Area 4.7000 0 0.85 Pond Area 4.0000 0 0.50 Residential & Undeveloped 11.5200 0 0.35 New Church 3.4800 0 0.69 Overall Approximation 64.0000 NA 0.69 [TIME CONCENTRATION -- User Defined] Time of Concentration (Tc) = 15.00 (min) [RAINFALL DESCRIPTION] Distribution Type = Synthetic Total Precipitation = 1.18 (in) Return Period = User Defined (yr) Storm Duration = 0.25 (hr) POND 7BASINS INFORMATION AND STORM SEWER COMPUTATIONS TAKEN PROVED PLAN #2301 -HTC AREA C GRADING PLAN c 2. Rivanna Engineering & Surveying, PLC (434) 9841599 Page 11 CD Cn w 2 P h y i L �I MIC F. MYERS I .yr . No. 33028 Akw �s`yroNAL �- 6ti ^'� m 0 W Y U Lu U C4 m Z V m 0 W z o ca z W LU e� e� o m m n r3 > - 9 E o •A ci • 4 A 0 4 ca V / C 4 > U O IL-Mn E C ps � o 'E C - U M --�- -I -C Z J i O CD I:D O C6 U U W� 0 to O C-) U U 2 P h y i L �I MIC F. MYERS I .yr . No. 33028 Akw �s`yroNAL �- 6ti ^'� m 0 W Y U Lu U C4 m Z V m 0 W z o ca z W LU e� e� o m m n r3 DOM. PROJECT NO:13.0018 INDEX TITLE: SHEET NO: 8 OF 8 DATE: 08/13/13 rn� o o •A ci • 4 o 0 4 ca Q co O M --�- -I Z J i O tii U CJ) I:D O C6 U U U w to O C-) U U X12 O DOM. PROJECT NO:13.0018 INDEX TITLE: SHEET NO: 8 OF 8 DATE: 08/13/13 LLI Q M --�- -I Z J i I:D O O DOM. PROJECT NO:13.0018 INDEX TITLE: SHEET NO: 8 OF 8 DATE: 08/13/13 M --�- -I I:D O O O � O W r W© O W W � W 2 CO DOM. PROJECT NO:13.0018 INDEX TITLE: SHEET NO: 8 OF 8 DATE: 08/13/13