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HomeMy WebLinkAbout16-20 Site PlanRichmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 C 1 9 0 1 5 0 . 0 0 _ C 0 0 1 COVER SHEET C 0 0 1 T . H A Y S A . C A L L A S S H O W N 1 S I T E P L A N M I L L B R O O K S U B S T A T I O N F R E D E R I C K C O U N T Y , V I R G I N I A J U L Y 2 0 2 0 I N D E X O F D R A W I N G S S H E E T N U M B E R D R A W I N G N U M B E R S H E E T N A M E 1 C 0 0 1 C O V E R S H E E T 2 C 0 0 2 L A Y O U T P L A N 3 C 0 0 3 E X I S T I N G C O N D I T I O N S A N D P H A S E 1 E & S P L A N 4 C 0 0 4 G R A D I N G , D R A I N A G E , A N D E & S P L A N 5 C 0 0 5 N O T E S A N D D E T A I L S 6 C 0 0 6 N O T E S A N D D E T A I L S 7 C 0 0 7 N O T E S A N D D E T A I L S 8 C 0 0 8 N O T E S A N D D E T A I L S RAPPAHA N O C K E L E C T R I C C O O P E R A T I V E P R O J E C T L O C A T I O N ·· X XXXXXXX X X X X X X X S 6 8 ° 0 3 ' 0 3 . 0 0 " E 2 2 5 . 0 0 0 S21° 56' 57.00"W 300.000 N 6 8 ° 0 3 ' 0 3 . 0 0 " W 2 2 5 . 0 0 0 N21° 56' 56.99"E6.316N85° 15' 45.30"W15.077N20° 20' 19.59"E32.559 L=11.703, R=28.000S67° 49' 13.86"E3.962 N21° 56' 57.00"E268.072 1 8 1 8 P R O P O S E D L I M I T O F D I S T U R B A N C E P R O P O S E D 1 8 " C O M P O S T F I L T E R S O C K P R O P O S E D M I N O R C O N T O U R S P R O P O S E D M A J O R C O N T O U R S E X I S T I N G M I N O R C O N T O U R S E X I S T I N G M A J O R C O N T O U R S C O N S T R U C T I O N E N T R A N C E L E G E N D S O I L S T A B I L I Z A T I O N B L A N K E T S F P R O P O S E D S I L T F E N C E Richmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 C 1 9 0 1 5 0 . 0 0 _ C 0 0 2 LAYOUT PLAN C 0 0 2 T . H A Y S A . C A L L A S S H O W N 2 X XXX 61 1 61 2 61 3 61 4 61 5 61 9 62 0 621 62 1 622 62 2 623 62 3 624 62 4 625 62 5 62 6 626 62 7 627 62 8 628 629 630 631 632 633 634 635 636 637 638 639 64 0 641 642 643 644 645 646 647 648 649 650 651 6 5 2 653 0 6 3 9 6 4 0 6 4 1 6 4 2 6 4 3 6 4 4 6 4 5 6 4 6 647648649650651652650651652652 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 601 6 0 2 6 0 3 6 0 4 6 0 5 6 0 6 6 3 2 6 3 3 6 3 4 6 3 5 6 3 6 6 3 7 6 3 8 6 3 9 6 4 0 6 4 1 6 4 2 6 4 3 6 4 4 6 4 5 6 4 6 6 4 7 6 4 8 6 4 9 6 5 0 6 5 1 652 630 625 620 615 6 1 0 635 630 625 620 620 6 2 5 650 6 4 0 6 4 1 6 4 2 6 4 3 6 4 4 6 4 5 6 4 6 6 4 7 6 4 8 6 4 9 6 3 5 6 3 0 611 612 613 614 615 616 617 618 619 620 1 8 1 8 1 8 1 8 18 1 8 18 18 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 S F SF S F S F S F S F SF SF SF 1 8 1 8 1 8 1 8 P R O P O S E D L I M I T O F D I S T U R B A N C E P R O P O S E D 1 8 " C O M P O S T F I L T E R S O C K P R O P O S E D M I N O R C O N T O U R S P R O P O S E D M A J O R C O N T O U R S E X I S T I N G M I N O R C O N T O U R S E X I S T I N G M A J O R C O N T O U R S C O N S T R U C T I O N E N T R A N C E L E G E N D S O I L S T A B I L I Z A T I O N B L A N K E T S F P R O P O S E D S I L T F E N C E Richmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 C 1 9 0 1 5 0 . 0 0 _ C 0 0 2 EXISTING CONDITIONS AND PHASE 1 E&S PLAN C 0 0 3 T . H A Y S A . C A L L A S S H O W N 3 X XXX 61 1 61 2 61 3 61 4 61 5 61 9 62 0 621 62 1 622 62 2 623 62 3 624 62 4 625 62 5 62 6 626 62 7 627 62 8 628 629 630 631 632 633 634 635 636 637 638 639 64 0 641 642 643 644 645 646 647 648 649 650 651 6 5 2 653 0 6 3 9 6 4 0 6 4 1 6 4 2 6 4 3 6 4 4 6 4 5 6 4 6 647648649650651652650651652652 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 601 6 0 2 6 0 3 6 0 4 6 0 5 6 0 6 6 3 2 6 3 3 6 3 4 6 3 5 6 3 6 6 3 7 6 3 8 6 3 9 6 4 0 6 4 1 6 4 2 6 4 3 6 4 4 6 4 5 6 4 6 6 4 7 6 4 8 6 4 9 6 5 0 6 5 1 652 630 625 620 615 6 1 0 635 630 625 620 620 6 2 5 650 6 4 0 6 4 1 6 4 2 6 4 3 6 4 4 6 4 5 6 4 6 6 4 7 6 4 8 6 4 9 6 3 5 6 3 0 611 612 613 614 615 616 617 618 619 620 1 8 1 8 1 8 1 8 18 1 8 18 18 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8XXXX X X X X X X X 1 8 1 8 1 8 1 8 P R O P O S E D L I M I T O F D I S T U R B A N C E P R O P O S E D 1 8 " C O M P O S T F I L T E R S O C K P R O P O S E D M I N O R C O N T O U R S P R O P O S E D M A J O R C O N T O U R S E X I S T I N G M I N O R C O N T O U R S E X I S T I N G M A J O R C O N T O U R S C O N S T R U C T I O N E N T R A N C E L E G E N D S O I L S T A B I L I Z A T I O N B L A N K E T S F P R O P O S E D S I L T F E N C E Richmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 C 1 9 0 1 5 0 . 0 0 _ C 0 0 2 GRADING, DRAINAGE, AND E&S PLAN C 0 0 4 T . H A Y S A . C A L L A S S H O W N 3 Richmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 C 1 9 0 1 5 0 . 0 0 _ C 0 0 4 NOTES AND DETAILS C 0 0 5 T . H A Y S A . C A L L A S S H O W N 5 VIRGINIA EROSION & SEDIMENT CONTROL MINIMUM STANDARDS1.PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOILSTABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS. PERMANENT STABILIZAT I O N S H A L L BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.2.DURING CONSTRUCTION OF THE PROJECT, SOIL STOCK PILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FO R T H E TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE3.A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED U N T I L A GROUND COVER IS ACHIEVED THAT IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION.4.SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND-DISTURBING A C T I V I T Y AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE.5.STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.6.SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN.6.a.THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN THREE A C R E S . 6.b.SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. T H E MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL IN T E G R I T Y OF THE BASIN DURING A 25-YEAR STORM OF 24-HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO A BARE EARTH CONDITION OR THOSE CON D I T I O N S EXPECTED TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED.7.CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMA N E N T STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED.8.CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE.9.WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED.10.ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT-LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FI R S T B E I N G FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT.11.BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT C H A N N E L LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL.12.WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE G R E A T E S T EXTENT POSSIBLE DURING CONSTRUCTION. NONERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE STRUCT U R E S I F ARMORED BY NONERODIBLE COVER MATERIALS.13.WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX-MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OFNONERODIBLE MATERIAL SHALL BE PROVIDED.14.ALL APPLICABLE FEDERAL, STATE AND LOCAL CHAPTERS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET.15.THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED.16.UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA:16.a.NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME.16.b.EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES.16.c.EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH, AND DISCHARGED IN A MANNER THAT DOES NO T ADVERSELY AFFECT FLOWING STREAMS OR OFF-SITE PROPERTY.16.d.MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE STABILIZATION.16.e.RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THIS CHAPTER.16.f.APPLICABLE SAFETY CHAPTERS SHALL BE COMPLIED WITH.17.WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO T H E PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHAL L B E REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOV E D I N T H I S MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND DISTURBING ACTIVITIES.18.ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER N E E D E D , UNLESS OTHERWISE AUTHORIZED BY THE VESCP AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERM A N E N T L Y STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION.19.PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCIT Y A N D PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA. STREAM RESTORATI O N A N D RELOCATION PROJECTS THAT INCORPORATE NATURAL CHANNEL DESIGN CONCEPTS ARE NOT MAN-MADE CHANNELS AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITY REQU I R E M E N T S FOR NATURAL OR MAN-MADE CHANNELS:19.a.CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR MAN-MADE RECEIVING CHANNEL, PIPE OR STORM S E W E R SYSTEM. FOR THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM SHALL BE PERFOR M E D . 19.b.ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE FOLLOWING MANNER:19.b.1.THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE AREA TO THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE HUNDRED TIMES GREATER THAN THE CONTRIBUTING D R A I N A G E AREA OF THE PROJECT IN QUESTION;19.b.2.OR19.b.2.A.NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A TWO-YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP CHANNEL BANKS NOR CAUSE EROSION OF CHANN E L B E D O R BANKS.19.b.2.B.ALL PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS SHALL BE ANALYZED BY THE USE OF A TEN-YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP ITS BANKS AND B Y T H E U S E OF A TWO-YEAR STORM TO DEMONSTRATE THAT STORMWATER WILL NOT CAUSE EROSION OF CHANNEL BED OR BANKS; AND19.b.2.C.PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY THE USE OF A TEN-YEAR STORM TO VERIFY THAT STORMWATER WILL BE CONTAINED WITHIN THE PIPE OR SYSTEM.19.c.IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS OR PIPES ARE NOT ADEQUATE, THE APPLICANT SHALL:19.c.1.IMPROVE THE CHANNELS TO A CONDITION WHERE A TEN-YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO-YEAR STORM WILL NOT CAUSE EROSION TO CHANNEL THE BED OR BA N K S ; O R 19.c.2.IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE TEN-YEAR STORM IS CONTAINED WITHIN THE APPURTENANCES;19.c.3.DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE PRE-DEVELOPMENT PEAK RUNOFF RATE FROM A TWOYEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A NATURAL CHANNE L O R W I L L NOT CAUSE THE PREDEVELOPMENT PEAK RUNOFF RATE FROM A TEN-YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A MANMADE CHANNEL; OR19.c.4.PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT, STORMWATER DETENTION OR OTHER MEASURES WHICH IS SATISFACTORY TO THE VESCP AUTHORITY TO PREVENT DOWNSTREA M E R O S I O N . 19.d.THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE IMPROVEMENTS.19.e.ALL HYDROLOGIC ANALYSES SHALL BE BASED ON THE EXISTING WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT CONDITION OF THE SUBJECT PROJECT.19.f.IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES STORMWATER DETENTION, HE SHALL OBTAIN APPROVAL FROM THE VESCP OF A PLAN FOR MAINTENANCE OF THE DETENTION FACILIT I E S . T H E PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY AND THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE.19.g.OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED TO A RECEIVING CHANNEL, AND ENERGY DISSIPATORS SHALL BE PLACED AT THE OUTFALL OF ALL DETENTION FACILITIES AS NECE S S A R Y T O PROVIDE A STABILIZED TRANSITION FROM THE FACILITY TO THE RECEIVING CHANNEL.19.h.ALL ON-SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE.19.i.INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE EROSION OR SEDIMENTATION ON ADJACENT PROPERTY SHALL BE DIVERTED TO A STABLE OUTLET, ADEQUATE CHANNEL, PIPE OR PIP E S Y S T E M , OR TO A DETENTION FACILITY.19.j.IN APPLYING THESE STORMWATER MANAGEMENT CRITERIA, INDIVIDUAL LOTS OR PARCELS IN A RESIDENTIAL, COMMERCIAL OR INDUSTRIAL DEVELOPMENT SHALL NOT BE CONSIDERED TO BE S E P A R A T E DEVELOPMENT PROJECTS. INSTEAD, THE DEVELOPMENT, AS A WHOLE, SHALL BE CONSIDERED TO BE A SINGLE DEVELOPMENT PROJECT. HYDROLOGIC PARAMETERS THAT REFLECT THE ULTIMA T E DEVELOPMENT CONDITION SHALL BE USED IN ALL ENGINEERING CALCULATIONS.19.k.ALL MEASURES USED TO PROTECT PROPERTIES AND WATERWAYS SHALL BE EMPLOYED IN A MANNER WHICH MINIMIZES IMPACTS ON THE PHYSICAL, CHEMICAL AND BIOLOGICAL INTEGRITY O F R I V E R S , STREAMS AND OTHER WATERS OF THE STATE.19.l.ANY PLAN APPROVED PRIOR TO JULY 1, 2014, THAT PROVIDES FOR STORMWATER MANAGEMENT THAT ADDRESSES ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL O R MAN-MADE CHANNELS SHALL SATISFY THE FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS IF THE PRACTICES ARE DESIGNED TO19.l.1.DETAIN THE WATER QUALITY VOLUME AND TO RELEASE IT OVER 48 HOURS;19.l.2.DETAIN AND RELEASE OVER A 24-HOUR PERIOD THE EXPECTED RAINFALL RESULTING FROM THE ONE YEAR, 24- HOUR STORM; AND19.l.3.REDUCE THE ALLOWABLE PEAK FLOW RATE RESULTING FROM THE 1.5, 2, AND 10-YEAR, 24-HOUR STORMS TO A LEVEL THAT IS LESS THAN OR EQUAL TO THE PEAK FLOW RATE FROM THE S I T E ASSUMING IT WAS IN A GOOD FORESTED CONDITION, ACHIEVED THROUGH MULTIPLICATION OF THE FORESTED PEAK FLOW RATE BY A REDUCTION FACTOR THAT IS EQUAL TO THE RUNO F F V O L U M E FROM THE SITE WHEN IT WAS IN A GOOD FORESTED CONDITION DIVIDED BY THE RUNOFF VOLUME FROM THE SITE IN ITS PROPOSED CONDITION, AND SHALL BE EXEMPT FROM ANY FLO W R A T E CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS AS DEFINED IN ANY REGULATIONS PROMULGATED PURSUANT TO § 10.1-562 OR 10.1-570 OF THE ACT.19.m.FOR PLANS APPROVED ON AND AFTER JULY 1, 2014, THE FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS OF § 10.1-561 A OF THE ACT AND THIS SUBSECTION SHALL BE SATISFIED BYCOMPLIANCE WITH WATER QUANTITY REQUIREMENTS IN THE STORMWATER MANAGEMENT ACT (§ 10.1-603.2 ET SEQ. OF THE CODE OF VIRGINIA) AND ATTENDANT REGULATIONS, UNLESS S U C H LANDDISTURBING ACTIVITIES ARE IN ACCORDANCE WITH 4VAC50-60-48 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) PERMIT REGULATIONS.19.n.COMPLIANCE WITH THE WATER QUANTITY MINIMUM STANDARDS SET OUT IN 4VAC50-60-66 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) PERMIT REGULATIONS SHALL B E DEEMED TO SATISFY THE REQUIREMENTS OF MINIMUM STANDARD 19. Richmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 P R O J E C T D E S C R I P T I O N : T H E P R O J E C T I N V O L V E S T H E P R O P O S E D C O N S T R U C T I O N O F A S U B S T A T I O N P A D , R E T A I N I N G W A L L , A N D S T O R M D R A I N S Y S T E M O U T F A L L I N G T O A D R Y S W A L E . T H E D I S T U R B E D A R E A W I L L B E 2 . 2 7 A C R E S . E X I S T I N G S I T E C O N D I T I O N S : T H E S I T E C O N S I S T S O F A U N D E V E L O P E D , S L O P I N G , V E G E T A T E D A R E A S U B D I V I D E D F R O M A N E X I S T I N G C H U R C H O W N E D P R O P E R T Y . T H E S I T E C O N T A I N S S E V E R A L E X I S T I N G W E T L A N D A N D S T R E A M S I N C L U D I N G A T R I B U T A R Y T O A S H H O L L O W R U N W H I C H R E C E I V E S D R A I N A G E B Y S H E E T F L O W F R O M T H E P R O J E C T A R E A . A D J A C E N T A R E A S : T H E P R O J E C T A R E A I S B O R D E R E D B Y A C H U R C H P R O P E R T Y T O T H E W E S T A N D S O U T H , A S U B D I V I S I O N T O T H E E A S T A N D S O U T H E A S T , A N D S E V E R A L B U S I N E S S E S A N D B E R R Y V I L L E P I K E T O T H E N O R T H . O F F - S I T E A R E A S : E R O S I O N A N D S E D I M E N T C O N T R O L M E A S U R E S W I L L B E P L A C E D I N T H E A D J A C E N T 2 0 ' R I G H T O F W A Y F O R I N G R E S S / E G R E S S . A 2 5 ' A C C E S S E A S E M E N T I S P R O P O S E D T O C O N N E C T T H E S I T E T O T H I S E X I S T I N G E A S E M E N T . A T E M P O R A R Y C O N S T R U C T I O N E A S E M E N T W I L L B E N E E D E D F O R M I N O R G R A D I N G A C T I V I T I E S O C C U R I N G O N T H E A D J A C E N T G R A C E B R E T H R E N C H U R C H P R O P E R T Y . S O I L S : B A S E D O N I N F O R M A T I O N F R O M T H E U S D A W E B S O I L S U R V E Y T H E S O I L S ( S E E B E L O W ) O N S I T E A R E : · 1 B - B E R K S C H A N N E R Y S I L T L O A M S L O P E : 3 T O 8 P E R C E N T D E P T H T O R E S T R I C T I V E F E A T U R E : 2 0 T O 4 0 I N C H E S N A T U R A L D R A I N A G E C L A S S : W E L L D R A I N E D R U N O F F C L A S S : M E D I U M C A P A C I T Y O F T H E M O S T L I M I T I N G L A Y E R T O T R A N S M I T W A T E R : M O D E R A T E L Y L O W T O H I G H D E P T H T O W A T E R T A B L E : M O R E T H A N 8 0 I N C H E S · 4 1 E - W E I K E R T B E R K S C H A N N E R Y S I L T L O A M S S L O P E : 2 5 T O 6 5 P E R C E N T D E P T H T O R E S T R I C T I V E F E A T U R E : 1 0 T O 2 0 I N C H E S N A T U R A L D R A I N A G E C L A S S : S O M E W H A T E X C E S S I V E L Y D R A I N E D R U N O F F C L A S S : H I G H C A P A C I T Y O F T H E M O S T L I M I T I N G L A Y E R T O T R A N S M I T W A T E R : M O D E R A T E L Y H I G H T O H I G H D E P T H T O W A T E R T A B L E : M O R E T H A N 8 0 I N C H E S G E O L O G Y : S O I L S O N T H E W E S T E N D O F T H E P R O P O S E D P R O J E C T A R E A W I L L B E E X C A V A T E D T O B E U S E D A S F I L L W H E R E A P P L I C A B L E B E H I N D T H E W A L L . G E O L O G I C A L S T A B I L I T Y A N A L Y S I S W I L L B E I N C L U D E D W I T H T H E E N G I N E E R E D W A L L D E S I G N . C R I T I C A L A R E A S : W E T L A N D A N D S T R E A M T O T H E E A S T O F T H E P R O J E C T A R E A . S T E E P S L O P E S T O T H E E A S T A N D N O R T H E R O S I O N A N D S E D I M E N T C O N T R O L M E A S U R E S : S T O N E C O N S T R U C T I O N E N T R A N C E : T O B E I N S T A L L E D O N T H E E X I S T I N G A C C E S S R O A D . S I L T F E N C E : T O B E I N S T A L L E D O N T H E D O W N S T R E A M S I D E O F P R O P O S E D S L O P E S S O I L S T A B I L I Z A T I O N M A T T I N G : T O B E I N S T A L L E D I N L A R G E A R E A S O F S T E E P G R A D E . T E M P O R A R Y S E E D I N G : T O B E I N S T A L L E D O N D I S T U R B E D A R E A S W I T H I N S E V E N ( 7 ) D A Y S D U R I N G C O N S T R U C T I O N I N A R E A S T H A T W I L L R E M A I N D O R M A N T F O R L O N G E R T H E 1 4 D A Y S . P E R M A N E N T S E E D I N G W I L L B E I N S T A L L E D O N D I S T U R B E D A R E A S W H E N G R A D I N G I S C O M P L E T E D A N D W H E N T E M P O R A R Y C O N S T R U C T I O N E N T R A N C E S , S T A G I N G A R E A , A N D S T O C K P I L E S A R E R E M O V E D . S E Q U E N C E O F C O N S T R U C T I O N : P H A S E 1 : 1 . A P R E - C O N S T R U C T I O N M E E T I N G S H A L L B E H E L D W I T H A R E P R E S E N T A T I V E O F F R E D E R I C K C O U N T Y . 2 . S T O N E C O N S T R U C T I O N E N T R A N C E S S H A L L B E I N S T A L L E D A S S H O W N O N T H E P L A N S T O M I N I M I Z E T H E A M O U N T O F S E D I M E N T B E I N G T R A C K E D O F F T H E S I T E . 3 . S I L T F E N C E A N D C O M P O S T F I L T E R S O C K W I L L B E P L A C E D D O W N S T R E A M O F A R E A S T O B E G R A D E D . 4 . D I S T U R B E D A R E A S T H A T W I L L R E M A I N D O R M A N T F O R L O N G E R T H A N 1 4 D A Y S S H A L L B E T E M P O R A R I L Y S E E D E D . 5 . A F T E R T H E S E M E A S U R E S A R E I N S T A L L E D , T H E S I T E W I L L B E I N S P E C T E D B Y A R E P R E S E N T A T I V E F R O M F R E D E R I C K C O U N T Y P R I O R T O A N Y O T H E R C O N S T R U C T I O N A C T I V I T I E S . P H A S E 2 : 1 . P H A S E 2 M A Y B E G I N U P O N A P P R O V A L O F F R E D E R I C K C O U N T Y I N S P E C T O R 2 . C L E A R A N D G R U B T H E P R O P O S E D P R O J E C T A R E A W I T H I N T H E L I M I T S O F D I S T U R B A N C E . 3 . P E R F O R M E A R T H W O R K F O R C O N S T R U C T I O N O F P A D . 4 . C O N S T R U C T R E T A I N I N G W A L L I N A C C O R D A N C E W I T H T H E A P P R O V E D E N G I N E E R E D W A L L D E S I G N . 5 . A F T E R P A D A R E A H A S B E E N S T A B I L I Z E D , C O N S T R U C T P R O P O S E D D R Y S W A L E . I N C L U D I N G I N S T A L L A T I O N O F U N D E R D R A I N S A N D F I L T E R M E D I A . D R Y S W A L E I S T O B E C O N S T R U C T E D I N A C C O R D A N C E W I T H V A D E Q R E G U L A T I O N S . 6 . P L A C E S O I L S T A B I L I Z A T I O N M A T T I N G O N L A R G E S T E E P D I S T U R B E D A R E A S . 7 . O N C E A N A R E A I S S T A B I L I Z E D , T H E S I L T F E N C E A N D S T O N E C O N S T R U C T I O N E N T R A N C E C A N B E R E M O V E D A N D A N Y D I S T U R B E D A R E A S P E R M A N E N T L Y S E E D E D A N D M U L C H E D . P E R M A N E N T S T A B I L I Z A T I O N : T H E S T O N E C O N S T R U C T I O N E N T R A N C E W I L L B E R E M O V E D A N D V E G E T A T I O N W I L L B E R E E S T A B L I S H E D I N T H E D I S T U R B E D A R E A S A N D T H E P R O P O S E D D R Y S W A L E I N A C C O R D A N C E W I T H P E R M A N E N T S E E D I N G R E Q U I R E M E N T S S H O W N I N T H E T A B L E O N S H E E T C 0 0 5 . S T O R M W A T E R R U N O F F C O N S I D E R A T I O N S : T H E P R O P O S E D D R A I N A G E S Y S T E M W O U L D C O L L E C T W A T E R F R O M T H E P R O P O S E D S U B S T A T I O N P A D A N D R O U T E I T T H R O U G H A P R O P O S E D D R Y S W A L E B E F O R E D I S C H A R G I N G A S S H E E T F L O W . C A L C U L A T I O N S : C A L C U L A T I O N S F O R T H E P R O P O S E D S T O R M D R A I N S Y S T E M H A V E B E E N I N C L U D E D I N A C A L C U L A T I O N P A C K A G E . M A I N T E N A N C E : E R O S I O N C O N T R O L M E A S U R E S S H A L L B E M A I N T A I N E D I N A C C O R D A N C E W I T H T H E V I R G I N I A E R O S I O N C O N T R O L H A N D B O O K . E R O S I O N C O N T R O L N A R R A T I V E U S D A - S O I L S D A T A M A P · · · · · · · · · · · · · · · · · C 1 9 0 1 5 0 . 0 0 _ C 0 0 4 NOTES AND DETAILS C 0 0 6 T . H A Y S A . C A L L A S S H O W N 6 Richmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 C 1 9 0 1 5 0 . 0 0 _ C 0 0 4 NOTES AND DETAILS C 0 0 7 T . H A Y S A . C A L L A S S H O W N 6 Richmond | 120 Eastshore Drive, Suite 100, Glen Allen, VA 23059 gai consultantsgaiconsultants S H E E T N O . : NO.:DATE:DWN:CHK:APV:DESCRIPTION: REVISION RECORD O F G A I F I L E N U M B E R : G A I D R A W I N G N U M B E R : A L T . / C L I E N T D R A W I N G N U M B E R : S C A L E : DRAWING TITLE PROJECT I S S U E D A T E : A P P R O V E D B Y : C H E C K E D B Y : D R A W N B Y : CLIENT R E V I S I O N D W G T Y P E : © 2 0 2 0 G A I C o n s u l t a n t s ISSUING OFFICE: MILLBROOK SUBSTATION SITE PLAN FREDERICK COUNTY VIRGINIA 22602 RAPPAHANOCK ELECTRIC COOPERATIVE 247 INDUSTRIAL COURT FREDERICKSBURG, VA 22408 T . H A Y S 7 / 3 1 / 2 0 2 0 8 A / 0 S P # 1 5 - 2 0 C 1 9 0 1 5 0 . 0 0 _ C 0 0 4 NOTES AND DETAILS C 0 0 8 T . H A Y S A . C A L L A S S H O W N 7