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Home My WebLink AboutWPO201800094 Plan - VSMP 2019-03-07DIRECTIONS FROM 12110 SUNSET HILLS ROAD, RESTON, VA (MILESTONE COMMUNICATIONS): TURN RIGHT ONTO SUNSET HILLS ROAD. MERGE ONTO VA-286 S/FAIRFAX COUNTY PARKWAY. MERGE ONTO I-66 W. TAKE EXIT 1A RAMP LEFT FOR I-81 S TOWARD ROANOKE. TAKE EXIT 221 RAMP RIGHT FOR I-64 E TOWARD CHARLOTTESVILLE. TAKE EXIT 107 RAMP RIGHT FOR US-250 TOWARD CROZET/YANCEY MALLS. TURN LEFT ONTO US-250 E/ROCKFISH GAP TPKE. 5941 ROCKFISH GAP TKPE IS ON THE RIGHT. DIRECTIONS z LLJ 0 CL d 0 LLJ c� t- 0 Of CL I a VSMP/WP0201800094 5941 ROCKFISH GAP TPKE PROJECT DESCRIPTION THE SITE WILL CONSIST OF OF A NEW 35'X75' FENCED COMPOUND AND GRAVEL ACCESS ROAD. LOCATED WITHIN THE FENCED COMPOUND WILL BE A NEW 145' MONOPOLE, 'EQUIPMENT AND H—FRAME. THE TOWER IS LOCATED BEHIND THE BLEACHERS ADJACENT TO THE FOOTBALL FIELD ON THE EASTERN SIDE OF THE PARCEL. REV. NO. DESCRIPTION BY DATE REV. N0. DESCRIPTION ENGINEERING: DEWBERRY ENGINEERS INC. 4805 LAKE BROOK DRIVE, SUITE 200 GLEN ALLEN, VA 23060 PHONE # 804.205.3337 CONTACT: DEREK MARSHALL, PE, LEED AP ENGINEERING: ENTREX COMMUNICATIONS SERVICES, INC. 6600 ROCKLEDGE DRIVE, SUITE 550 BETHESDA, MD 20817 PHONE: 202-408-09 60x 101 CONTACT: COLLEEN KHAN ALL WORK SHALL BE PERFORMED IN ACCORDANCE WITH THE CURRENT EDITIONS OF THE FOLLOWING CODES AS ADOPTED BY THE GOVERNING AUTHORITIES. — 2012 INTERNATIONAL BUILDING CODE (IBC) — 2011 NATIONAL ELECTRIC CODE (NEC) — 2018 NFPA 101, LIFE SAFETY CODE — MANUAL OF STEEL CONSTRUCTION, 15th EDITION — AMERICAN CONCRETE INSTITUTE — ANSI/TIA-222—H — ANTENNA SUPPORTING STRUCTURES AND ANTENNAS HAVE BEEN DESIGNED IN ACCORDANCE WITH THE IBC 2012 SECTION 1609 WIND LOADS, EXCEPTION #5 REFERENCING TIA-222 FOR APPROVAL SPECIAL USE PERMIT SP201700026 WAS APPROVED 9/12/18 CRITICAL SLOPE WAIVER REVIEWED BY ALBEMARLE COUNTY, JANUARY 2018 PROPERTY OWNER: COUNTY OF ALBEMARLE SCHOOL BOARD 401 McINTIRE ROAD CHARLOTTESVILLE, VA 22902 PROJECT INFO: LOCATION NAME: WESTERN ALBEMARLE HIGH SCHOOL APPLICANT INFO: MILESTONE COMMUNICATIONS 12110 SUNSET HILLS ROAD, SUITE 100 RESTON, VA 20190 PHONE: 703.620.2555 x104 CONTACT: LEN FORKAS PROJECT DATA: ZONING: RURAL AREA PARCEL ID: 05600-00-00-017CO ACREAGE: 75 JURISDICTION: ALBEMARLE COUNTY SITE TYPE: RAWLAND TOWER TYPE: MONOPOLE TOWER HEIGHT: 145' OVERALL HEIGHT: 147' LEASE AREA: 2625 SF AREA OF DISTURBANCE: 13900 SF CENTER OF PROPOSED TOWER*: LATITUDE: 38' 02' 51.438" N LONGITUDE: 78° 42' 08.320" W ELEVATION: 684.9' AMSL *PER ZONING DRAWINGS PREPARED BY ENTREX COMMUNICATION SERVICES, INC. DATED 04/30/18 THIS DOCUMENT WAS DEVELOPED TO REFLECT A SPECIFIC SITE AND ITS SITE CONDITIONS AND IS NOT TO BE USED FOR ANOTHER SITE OR WHEN OTHER CONDITIONS PERTAIN. REUSE OF THIS DOCUMENT IS AT THE SOLE RISK OF THE USER. A.D.A. COMPLIANCE: FACILITY IS UNMANNED AND NOT FOR HUMAN HABITATION. 02/28/ 19 INDEX OF DRAWINGS SHT. NO. DESCRIPTION T-1 TITLE SHEET C-0 EROSION & SEDIMENT CONTROL PLAN C-1 EROSION & SEDIMENT CONTROL NOTES , C-2 EROSION & SEDIMENT CONTROL DETAILS C-3 LAND COVER MAPS C-4 STORMWATER MANAGEMENT NARRATIVE & CALCS APPROVED_ ., by the Albemar e GO ,n0117 PoadmQnt Com�nuni Y 17 c - Uake o r;►h ENTREX COMMUNICATION SERVICES, INC. . 6600 ROCKLEDGE DRIVE, SUITE 550 BETHESDA, MD 20817 MILESTONE COMMUNICATIONS - SHENTEL AT WESTERN ALBEMARLE HIGH SCHOOL E&SC AND SWM PLANS D. 02/28/19 FOR APPROVAL C 02/20/19 FOR REVIEW B 01 /23/19 FOR REVIEW A 1 1 /26/18 FOR REVIEW uewberry .> 1f Dewberry Engineers Inc. 4805 Lake Brook Drive, Suite 200 Glen Alien, VA 23060 Phone: 804.290.7957 Fax: 804.290.7928 www.dewberry.com �SALTHq �uAV DEREK R. � . ,MARSHALL LIc. No. 4881 p � 0 � >�s 0 L G DRAWN BY: ARB .REVIEWED BY: HGS CHECKED BY: DRM PROJECT NUMBER: 50108352 SITE ADDRESS: 5941 ROCKFISH GAP TPKE CROZET, VA 22932 SHEET TITLE TITLE SHEET SHEEP NUMBER T 1 E&S NARRATIVE PROJECT DESCRIPTION THIS PROJECT INCLUDES THE INSTALLATION OF A NEW MONOPOLE, CONCRETE EQUIPMENT PLATFORMS AND ASSOCIATED EQUIPMENT WITHIN A 35'x75' FENCED COMPOUND. THE PROJECT WILL DISTURB APPROXIMATELY 0.32 ACRES. EXISTING SITE CONDITIONS THE SITE INCLUDES WOODLANDS AND VEGETATIVE COVER WITH AN EXISTING GRAVEL PATH. SOILS SEE THIS SHEET. SOILS LOCATED ON SITE ARE AS FOLLOWS: 7B - BRADDOCK LOAM, 2 TO 7 PERCENT SLOPES 37D3 - HAYESVILLE CLAY LOAM 15 TO 25 PERCENT SLOPES, SEVERELY ERODED ADJACENT PROPERTY THE PROPOSED IMPROVEMENTS ARE LOCATED ADJACENT TO THE WESTERN ALBEMARLE HIGH SCHOOL TRACK AND FIELD. THE SITE IS BOUND ON THE SOUTH BY THE FIELD AREA, THE NORTH AND EAST BY WOODLANDS, AND THE WEST BY A PARKING LOT. THE SITE DRAINS TO THE NORTH, WHERE THERE IS A NEARBY TRIBUTARY TO STOCKTON CREEK. CRITICAL AREAS THERE ARE STEEP SLOPES ON SITE. THE PLAN HAS BEEN DEVELOPED TO MINIMIZE LAND DISTURBANCE. WHERE GRADING IS NECESSARY, ADEQUATE PRECAUTIONS SHALL BE TAKEN TO MINIMIZE EROSION AND TO CONTAIN SILT THROUGH PROPER EROSION AND SEDIMENT CONTROL PRACTICES. MANAGEMENT STRATEGIES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. 2. PERMANENT SEEDING WILL BEGIN IMMEDIATELY FOLLOWING GRADING OPERATIONS. 3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 4. AFTER ACHIEVING ADEQUATE STABILIZATION, THE TEMPORARY E&S CONTROLS WILL BE CLEANED UP AND REMOVED IMMEDIATELY. EROSION AND SEDIMENT CONTROL MEASURES THE INTENT OF THIS EROSION AND SEDIMENT CONTROL PLAN IS TO GUIDE THE CONTRACTOR IN IMPLEMENTING ACCEPTABLE MEASURES, INFRASTRUCTURE, AND MAINTENANCE PROGRAMS THAT WILL MINIMIZE THE AMOUNT OF EROSION AND RESULTING SEDIMENT THAT WILL TAKE PLACE DURING THE CONSTRUCTION OF THIS PROJECT. ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO THE MINIMUM STANDARDS AND SPECIFICATIONS OF THE VA EROSION & SEDIMENT CONTROL HANDBOOK. STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES CONSTRUCTION ENTRANCE (ALBEMARLE COUNTY DESIGN STANDARDS MANUAL) PAVED WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS. CONSTRUCTION ENTRANCES REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE LIMITED TO THOSE SHOWN ON THE PLANS OR OTHERWISE APPROVED BY THE SOIL EROSION OFFICER. SUPPLEMENTAL DRAWINGS SHALL BE PROVIDED BY THE CONTRACTOR FOR APPROVAL IF ADDITIONAL ENTRANCES ARE REQUIRED. SILT FENCE (VESCH STD. & SPEC. 3.05): A TEMPORARY SEDIMENT BARRIER CONSISTING OF A FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED. SILT FENCE IS INSTALLED TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE CHANNEL FLOWS. ROCK CHECK DAM (VESCH STD. & SPEC 3.20): SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS AS SWALE OR DRAINAGE DITCH TO REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROSION OF THE SWALE OR DITCH. THIS PRACTICE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT AREAS OR THE DITCH ITSELF, MAINLY BY PONDING OF THE STORMWATER RUNOFF. TREE PRESERVATION & PROTECTION (VESCH STD. & SPEC. 3.38) PROTECTION OF DESIRABLE TREES FROM MECHANICAL AND OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TREE PRESERVATION AND PROTECTION IS USED TO ENSURE THE SURVIVAL OF THE DESIRABLE TREES WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. FOR USE IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES. TEMPORARY AND PERMANENT STABILIZATION PERMANENT OR TEMPORARY SEEDING (STD. & SPEC. 3.31, 3.32): 4 TEMPORARY SEEDING 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 AND LESS THAN ONE YEAR. THIS INCLUDES, BUT IS NOT LIMITED TO, STOCKPILES. AREAS TO BE PERMANENTLY SEEDED ARE TO USE A CERTIFIED SEED. ALL SEEDED AREAS ARE TO BE STRAW MULCHED AT THE RATE OF TWO TONS PER ACRE. SODDING SHALL BE APPLIED AND A PERENNIAL VEGETATIVE COVERING SHALL BE ESTABLISHED ON DISTURBED AREAS WITHIN SEVEN DAYS OF BEING BROUGHT TO FINAL GRADE ON AREAS NOT OTHERWISE PROTECTED. SELECTION OF THE SEED MIXTURE SHALL DEPEND ON THE TIME OF YEAR IT IS TO BE APPLIED. MULCHING (STD. & SPEC. 3.35): APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. MULCHING PREVENTS EROSION BY PROTECTING THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. MULCHING FOSTERS THE GROWTH OF VEGETATION BY INCREASING AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. FOR USE IN AREAS WHICH HAVE BEEN PERMANENTLY SEEDED. MULCHING SHOULD OCCUR IMMEDIATELY FOLLOWING SEEDING. AREAS THAT CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED WITH AN ORGANIC MULCH. BLANKETS AND MATTING (VESCH STD. & SPEC. 3.36): THE INSTALLATION OF PROTECTIVE COVERING (BLANKET) OR A SOIL STABILIZATION MAT ON A PREPARED PLANTING AREA OF A STEEP SLOPE, CHANNEL, OR SHORELINE. AIDS IN CONTROLLING EROSION ON CRITICAL AREAS BY PROVIDING A MICROCLIMATE WHICH PROTECTS YOUNG VEGETATION AND PROMOTES ITS ESTABLISHMENT. RAISES THE MAXIMUM PERMISSIBLE VELOCITY OF TURF GRASS STANDS IN CHANNELIZED AREAS BY REINFORCING THE TURF TO RESIST THE FORCES OF EROSION DURING STORM EVENTS. SOIL STOCKPILES AND BORROW AREAS NO STOCKPILES AND/OR BORROW AREAS ARE ANTICIPATED ON THE SITE. IF STOCKPILES AND/OR BORROW AREAS ARE NEEDED, THE CONTRACTOR SHALL IMPLEMENT THE REQUIRED EROSION CONTROL DEVICES PER THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND OBTAIN REQUIRED PERMITS. EROSION AND SEDIMENT CONTROL MAINTENANCE IN GENERAL, ALL THE EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED WEEKLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT TO ENSURE THEY ARE IN WORKING ORDER. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. SILT FENCE: SEDIMENT DEPOSITS SHALL BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER, FABRIC SHALL BE REPLACED IF IT HAS DECOMPOSED OR BECOME INEFFECTIVE. 2. SEEDING: THE SEEDED AREAS SHALL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. 3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING AN EMPLOYEE WHO WILL BE IN CHARGE OF THE EROSION AND SEDIMENT CONTROL PLAN AND REQUIREMENTS FOR THE PROJECT THAT IS CERTIFIED BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION AS A RESPONSIBLE LAND DISTURBER (RLD). THE NAME OF THE CONTRACTOR'S RLD AND COPY OF HIS CURRENT CERTIFICATION SHALL BE PROVIDED TO THE OWNER, ENGINEER AND EROSION & SEDIMENT CONTROL PLAN APPROVING AUTHORITY PRIOR TO ISSUANCE OF THE NOTICE TO PROCEED FOR THE PROJECT. PLANT PROTECTION TREES AND VEGETATION ADJACENT TO THE ACTUAL WORK AREA OR BORROW AREA ARE TO BE PROTECTED WITH TEMPORARY CONSTRUCTION SAFETY FENCE TO PRESERVE EXISTING ITEMS INDICATED TO REMAIN AND TO PREVENT DAMAGE TO PROPERTY PER VESCH SPEC 3.38. UNDERGROUND UTILITIES SHALL BE LOCATED SO THAT CONSTRUCTION WILL NOT DAMAGE OR DESTROY THE PLANTS TO REMAIN. UTILITY TRENCHING SHALL NOT BE LOCATED CLOSER THAN 1'-0" FOR EACH 1" IN DIAMETER UP TO A MAXIMUM OF 20'-0" FOR TREES TO REMAIN. DAMAGED TREES AND PLANTS SHALL BE RESTORED TO THE SATISFACTION OF THE OWNER. THE PARKING OF VEHICLES AND STORAGE OF ANY CONSTRUCTION EQUIPMENT OR MATERIALS SHALL NOT OCCUR UNDER THE DRIP LINE OF TREES TO BE PROTECTED. SEQUENCE OF CONSTRUCTION 1. A PRECONSTRUCTION MEETING SHALL BE SCHEDULED BY THE CONTRACTOR WITH AN INSPECTOR FROM THE COUNTY AT LEAST 48 HOURS PRIOR TO ANY VEGETATION OR LAND DISTURBANCE ACTIVITIES. 2. CONSTRUCTION SHALL BE SEQUENCED SUCH THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. 3. THE CONTRACTOR IS RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 4. THE CONTRACTOR IS TO INSTALL THE EROSION AND SEDIMENT CONTROL MEASURES INCLUDING: CONSTRUCTION ENTRANCE, SILT FENCE, AND INLET PROTECTION. 5. LAND DISTURBANCE OUTSIDE THE PRELIMINARY LIMITS OF DISTURBANCE MAY NOT OCCUR UNTIL THE INITIAL ESC MEASURES INSTALLATION HAS BEEN APPROVED BY THE ENVIRONMENTAL INSPECTOR. 6. PHASE I: • INSTALL EROSION AND SEDIMENT CONTROL DEVICES. • INSTALL PROPOSED UTILITIES. • TEMPORARY SEED AND MULCH DISTURBED AREAS. PHASE II: • PERMANENTLY SEED TO STABILIZE SITE 2. UPON APPROVAL BY THE COUNTY INSPECTOR, THE CONTRACTOR IS TO REMOVE ALL TEMPORARY EROSION AND SEDIMENT CONTROL DEVICES ONCE ALL AREAS ARE STABILIZED. EROSION AND SEDIMENT CONTROL NOTES 1. NO MORE THAN 200 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME. AT THE END OF EACH WORK DAY, ALL EXCAVATION SHALL BE FILLED OR PLATTED. 2. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. CONTRACTOR SHALL PROVIDE APPROPRIATE PROTECTION TO CONTROL SEDIMENT WASHING INTO THE TRENCH. 3. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A DISPOSAL AREA. 4. ALL EROSION CONTROL DEVICES SHALL BE IN PLACE AND FUNCTIONAL AT ALL TIMES AND IF REMOVED FOR CONSTRUCTION PROGRESS, SHALL BE REPLACED BY THE CLOSE OF EACH WORKDAY. 5. FINAL REMOVAL OF EROSION CONTROL DEVICES SHALL NOT OCCUR UNTIL THE OWNER OR HIS DESIGNATED AGENT DEEMS THE SITE STABILIZED, 6. SOD IS TO BE IN ACCORDANCE WITH THE SODDING SCHEDULE PROVIDED IN THE LATEST EDITION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 7. THE CONTRACTOR SHALL BE RESPONSIBLE FOR SATISFYING ANY AND ALL EROSION CONTROL (EC) AND STORMWATER MANAGEMENT (SWM) REQUIREMENTS FOR ANY LAND DISTURBING ACTIVITIES, INCLUDING BUT NOT LIMITED TO ON -SITE OR OFF -SITE BORROW, ON -SITE OR OFF -SITE STOCKPILING OR DISPOSAL OF WASTE MATERIALS. BEFORE UNDERTAKING ANY LAND EROSION CONTROL AND STORMWATER MANAGEMENT, THE CONTRACTOR SHALL CONTACT THE COUNTY ENVIRONMENTAL ENGINEERING DEPARTMENT TO DETERMINE WHAT EC AND SWM MEASURES ARE NECESSARY. ALL EC AND SWM MEASURES MUST BE APPROVED BY THE COUNTY INSPECTOR AND THE OWNER BEFORE IMPLEMENTATION. THE CONTRACTOR SHALL COMPLETELY SATISFY ALL REQUIREMENTS OF THE COUNTY ENVIRONMENTAL ENGINEERING DEPARTMENT BEFORE CONTINUING WITH THE CONCERNED ACTIVITY. THE TEMPORARY EROSION AND SEDIMENT CONTROL ITEMS SHOWN ON THE E&S CONTROL PLANS ARE INTENDED TO PROVIDE A GENERAL PLAN FOR CONTROLLING EROSION AND SILTATION WITHIN THE PROJECT LIMITS. GENERAL NOTES 1. THE INFORMATION AND DATA SHOWN OR INDICATED WITH RESPECT TO EXISTING UNDERGROUND FACILITIES AT OR CONTIGUOUS TO THE SITE IS BASED ON INFORMATION AND DATA FURNISHED TO THE ENGINEER BY THE OWNER. THE OWNER AND ENGINEER SHALL NOT BE RESPONSIBLE FOR THE ACCURACY OR COMPLETENESS OF ANY SUCH INFORMATION OR DATA. THE CONTRACTOR SHALL HAVE FULL RESPONSIBILITY FOR REVIEWING AND CHECKING ALL SUCH INFORMATION AND DATA, FOR LOCATING ALL UNDERGROUND FACILITIES SHOWN OR INDICATED PRIOR TO CONSTRUCTION, FOR COORDINATION OF THE WORK WITH THE OWNERS OF SUCH UNDERGROUND FACILITIES DURING CONSTRUCTION, FOR THE SAFETY AND PROTECTION THEREOF RESULTING FROM THE WORK, ALL OF WHICH WILL BE AT NO ADDITIONAL COST TO THE OWNER. CONTRACTOR SHALL CONTACT "MISS UTILITY" OF VIRGINIA AT 1-800-552-7001 72 HOURS PRIOR TO THE START OF CONSTRUCTION. 2. WHEN WORKING ADJACENT TO EXISTING STRUCTURES, POLES, ETC., CONTRACTOR SHALL USE WHATEVER METHODS THAT ARE NECESSARY TO PROTECT STRUCTURES FROM DAMAGE. CONTRACTOR SHALL HAND EXCAVATE WITHIN 5' OF ALL BUILDINGS, WALLS AND STRUCTURES. REPLACEMENT OF DAMAGED STRUCTURES SHALL BE AT THE CONTRACTOR'S EXPENSE. 3. CONTRACTOR SHALL IMMEDIATELY REPORT ANY DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONTRACT DOCUMENTS TO THE ENGINEER. 4. THE LOCATION OF ALL EXISTING UTILITIES ACROSS THE LINES OF THE PROPOSED WORK ARE NOT NECESSARILY SHOWN ON THE PLANS, AND WHERE SHOWN ARE ONLY APPROXIMATE. THE CONTRACTOR SHALL LOCATE ALL UNDERGROUND LINES AND STRUCTURES AS NECESSARY PRIOR TO CONSTRUCTION. 5. ALL MATERIALS AND CONSTRUCTION SHALL COMPLY WITH THE CONSTRUCTION DOCUMENTS. 6. DATUM FOR ALL ELEVATIONS IS BASED ON NAVD 88 PER COMMERCIAL SITE DESIGN SURVEY. 7. CERTIFICATION THAT 95% COMPACTION IS OBTAINED SHALL BE PROVIDED FOR ALL FILL AREAS, INCLUDING UNDER UTILITIES AND APPURTENANCES. THE CERTIFICATION SHALL STATE THE EXACT AREA THAT THE CERTIFICATION APPLIES TO. COMPACTION SHALL BE ACHIEVED IN ACCORDANCE WITH ASTM-D698, STANDARD PROCTOR DENSITY FOR COMPACTION. 8. ANY ALTERATIONS AND CONNECTIONS TO ANY UTILITY MUST BE COORDINATED WITH THE OWNER. 9. CONTRACTOR WORK DAYS AND HOURS SHALL BE MONDAY THROUGH FRIDAY 7 AM TO 6 PM. ANY DEVIATION FROM THIS SCHEDULE SHALL BE APPROVED BY THE OWNER. SHUTDOWNS WILL BE PERFORMED AT NIGHT AND WEEKENDS WITH 10 DAYS WRITTEN NOTICE AND WRITTEN APPROVAL OF THE COUNTY UTILITIES DEPARTMENT. 10. CONTRACTOR SHALL VERIFY DEPTHS OF ALL UTILITY CROSSINGS PRIOR TO CONSTRUCTION. 11. CONTRACTOR SHALL PROVIDE ALL CONSTRUCTION SIGNS. 12. THE CONTRACTOR SHALL VERIFY ELEVATIONS OF ALL POINTS OF CONNECTION OF PROPOSED WORK TO EXISTING STORM DRAIN PRIOR TO CONSTRUCTION. MINIMUM STANDARDS 9VAC25-840-40), A VESCP MUST BE CONSISTENT WITH THE FOLLOWING CRITERIA, TECHNIQUES AND METHODS: 1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS. PERMANENT STABILIZATION SHALL 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 FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. 3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL 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 ACTIVITY 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. 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 ACRES. 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. THE 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 INTEGRITY 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 CONDITIONS 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 P THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT 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 FIRST BEING 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 CHANNEL 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 GREATEST EXTENT POSSIBLE DURING CONSTRUCTION. NONERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF 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 OF NONERODIBLE MATERIAL SHALL BE PROVIDED. 14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS 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: a. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME. b. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. C. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH 41 APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH-, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFF -SITE PROPERTY. d. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE STABILIZATION. e. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THIS CHAPTER. f. APPLICABLE SAFETY REQUIREMENTS 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 THE 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 SHALL BE 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 REMOVED IN THIS 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 NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE VESCP AUTHORITY, TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY 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, VELOCITY AND PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA. STREAM RESTORATION AND RELOCATION PROJECTS THAT INCORPORATE NATURAL CHANNEL DESIGN CONCEPTS ARE NOT MAN-MADE CHANNELS AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS: a. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR MAN-MADE RECEIVING CHANNEL, PIPE OR STORM SEWER 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 PERFORMED. b. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE FOLLOWING MANNER: (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 DRAINAGE AREA OF THE PROJECT IN QUESTION; OR (2A) 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 CHANNEL BED OR BANKS. (213) ALL PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS SHALL BE ANALYZED BY THE USE OF A 10-YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP ITS BANKS AND BY THE USE OF A TWO-YEAR STORM TO DEMONSTRATE THAT STORMWATER WILL NOT CAUSE EROSION OF CHANNEL BED OR BANKS; AND (2C) PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY THE USE OF A 10-YEAR STORM TO VERIFY THAT STORMWATER WILL BE CONTAINED WITHIN THE PIPE OR SYSTEM. C. IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS OR PIPES ARE NOT ADEQUATE, THE APPLICANT SHALL: (1) IMPROVE THE CHANNELS TO A CONDITION WHERE A 10-YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO-YEAR STORM WILL NOT CAUSE EROSION TO THE CHANNEL, THE BED, OR THE BANKS; OR (2) IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE 10-YEAR STORM IS CONTAINED WITHIN THE APPURTENANCES; (3) DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TWO-YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A NATURAL CHANNEL OR WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A 10-YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL; OR (4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT, STORMWATER DETENTION OR OTHER MEASURES WHICH IS SATISFACTORY TO THE VESCP AUTHORITY TO PREVENT DOWNSTREAM EROSION. d. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE IMPROVEMENTS. e. ALL HYDROLOGIC ANALYSES SHALL BE BASED ON THE EXISTING WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT CONDITION OF THE SUBJECT PROJECT. 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 FACILITIES. THE PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY AND THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE. 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 NECESSARY TO PROVIDE A STABILIZED TRANSITION FROM THE FACILITY TO THE RECEIVING CHANNEL. h. ALL ON -SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE. L 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 PIPE SYSTEM, OR TO A DETENTION FACILITY. j. IN APPLYING THESE STORMWATER MANAGEMENT CRITERIA, INDIVIDUAL LOTS OR PARCELS IN A RESIDENTIAL, COMMERCIAL OR INDUSTRIAL DEVELOPMENT SHALL NOT BE CONSIDERED TO BE SEPARATE DEVELOPMENT PROJECTS. INSTEAD, THE DEVELOPMENT, AS A WHOLE, SHALL BE CONSIDERED TO BE A SINGLE DEVELOPMENT PROJECT. HYDROLOGIC PARAMETERS THAT REFLECT THE ULTIMATE DEVELOPMENT CONDITION SHALL BE USED IN ALL ENGINEERING CALCULATIONS. 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 OF RIVERS, STREAMS AND OTHER WATERS OF THE STATE. I. ANY PLAN APPROVED PRIOR TO JULY 1, 2014, THAT PROVIDES FOR STORMWATER MANAGEMENT THAT ADDRESSES ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS SHALL SATISFY THE FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS IF THE PRACTICES ARE DESIGNED TO (1) DETAIN THE WATER QUALITY VOLUME AND TO RELEASE IT OVER 48 HOURS; (11) DETAIN AND RELEASE OVER A 24-HOUR PERIOD THE EXPECTED RAINFALL RESULTING FROM THE ONE YEAR, 24-HOUR STORM; AND (III) 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 SITE 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 RUNOFF VOLUME 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 FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS AS DEFINED IN ANY REGULATIONS PROMULGATED PURSUANT TO § 62.1-44.15,.54 OR 62.1-44.15:65 OF THE ACT. m. FOR PLANS APPROVED ON AND AFTER JULY 1, 2014, THE FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS OF § 62.1-44.15:52 A OF THE ACT AND THIS SUBSECTION SHALL BE SATISFIED BY COMPLIANCE WITH WATER QUANTITY REQUIREMENTS IN THE STORMWATER MANAGEMENT ACT (§ 62.1-44.15:24 ET SEQ. OF THE CODE OF VIRGINIA) AND ATTENDANT REGULATIONS, UNLESS SUCH LAND -DISTURBING ACTIVITIES ARE IN ACCORDANCE WITH 9VAC25-870-48 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) REGULATION OR ARE EXEMPT PURSUANT TO SUBDIVISION C 7 OF § 62.1-44.15:34 OF THE ACT. n. COMPLIANCE WITH THE WATER QUANTITY MINIMUM STANDARDS SET OUT IN 9VAC25-870-66 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) REGULATION SHALL BE DEEMED TO SATISFY THE REQUIREMENTS OF THIS SUBDIVISION 19. GENERAL EROSION AND SEDIMENT CONTROL NOTES ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND THE VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS (9VAC25-840). ES-2: THE PLAN -APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. THE NAME OF THE RESPONSIBLE LAND DISTURBER MUST BE PROVIDED TO THE PLAN -APPROVING AUTHORITY PRIOR TO ACTUAL ENGAGEMENT IN THE LAND -DISTURBING ACTIVITY SHOWN ON THE APPROVED PLAN. IF THE NAME IS NOT PROVIDED PRIOR TO ENGAGING IN THE LAND -DISTURBING ACTIVITY, THE PLAN'S APPROVAL WILL BE REVOKED. ES-3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES-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. - ON OF ANY ADDITIONAL EROSION CONTROL UR ES 6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION MEASURES E NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN -APPROVING AUTHORITY. ES-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, AFTER WHICH, UPON APPROVAL OF THE PLAN -APPROVING AUTHORITY, THE CONTROLS SHALL BE REMOVED. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE REMOVAL OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. ES-8: DURING DEWATERING OPERATIONS, WATER SHALL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES AT LEAST EVERY 2 WEEKS AND IMMEDIATELY AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT, ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. ES-10: THE CONTRACTOR IS RESPONSIBLE FOR THE DAILY REMOVAL OF SEDIMENT THAT HAS BEEN TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE.. ES-11: SEEDING OPERATIONS SHALL BE INITIATED WITHIN 7 DAYS AFTER REACHING FINAL GRADE OR UPON SUSPENSION OF GRADING OPERATIONS FOR ANTICIPATED DURATION OF GREATER THAN 14 DAYS OR UPON COMPLETION OF GRADING OPERATIONS FOR A SPECIFIC AREA. ES-12: THE CONTRACTOR SHALL BE RESPONSIBLE FOR PREVENTING SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOILS WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS, OR HARM ANIMAL OR PLANT LIFE. ES-13: A VIRGINIA STORMWATER MANAGEMENT PROGRAM PERMIT (VSMPP) FOR THE DISCHARGE OF STORMWATER FROM CONSTRUCTION ACTIVITIES IS REQUIRED FOR PROJECTS AS LISTED IN VIRGINIA STATE CODE (9VAC25-870) OR PER LOCAL VSMP AUTHORITY. ENTREX COMMUNICATION SERVICES, INC. 6600 ROCKLEDGE DRIVE, SUITE 550 BETHESDA, MD 20817 MILESTONE COMMUNICATIONS - SHENTEL AT WESTERN ALBEMARLE HIGH SCHOOL E&SC AND SWM PLANS D 02/28/19 FOR APPROVAL C 02/20/19 FOR REVIEW B 01/23/19 IFOR REVIEW A ( 11/26/18 IFOR REVIEW 4911 6% =Ary,, aft 11.0'. Ds&wbez_ Dewberry Engineers Inc. 4805 Lake Brook Drive, Suite 200 Glen Allen, VA 23060 Phone: 804.290.7957 Fax: 804.290.7928 www.dewberry.com O�0 DEREK R. MARSHALL 8810 �NAL -,4 -19 FDRAWN BY: ARB REVIEWED BY: HGS CHECKED BY: DRM FPROJ NUMBER: 50108352 SITE ADDRESS: 5941 ROCKFISH GAP TPKE CROZET, VA 22932 SHEET TITLE EROSION 8c SEDIMENT CONTROL NOTES SHEEP NUMBER R fi�RACK T XWIG M F N Fj ell _17 L .b 4f OPERATIM 7777777777777: > H CK Z� 6� 1992 3. STAPLE FILTER 14TEKIAL TO ;5t��,KE§ Ah� E)CfEND IT INTO THE. THBNCIL Source: Va.. DSWC -RACKFILL ANP COMPAPT THE, EXCAVATE!) SOIL. II ET FLO W_ it I 3'T I *P VIEW) �RKRS - ECTIVE fit - 187 Plate, ,201 335 L.84-1354- RGANICfVWLCH'.MATLtRIALSAND.APPLICr-kTIONRAf 10 ES OATIE-S. MULCHES, NOTES: pv.r Al - 0 00, �0 tft. faWL -H ay ons 70 M 90 lbs. Free frdin,sir eds an coarse mim -V e _n huNd matter', i �Wst -b, wd tons:fox prea d with mulch blower , V1(iAT16,r.0Qv . er" or by hand. fiber Mulch wal , "WIT, .5 1 . _00 lbs. 35 lbs. Do not use as mulch for winter cover br d ur-ing hot, drekoAplyasidsppyl I slurry. 'Corn Stalks 6 tons" 185 - -2,75 14 or Shre Of in 4r6l' le4gths.,, Air-dr,10. Do not o , s e ini fill turf are ua Apply with mulch blower or by, - h. Pd. Wood,Chlps, Us togas 185 275 lbs. tt . A! �Frloe---6.f-:coa-rs�6.,,fti,it. Qr r,4. .,dri&d. Treaf With 12 lbs nitrogen per 101-n. Po not: Use Infine, airf areas- Apply with taulch blower, chip Or by h an- Q .1ps 5 01: .70,cup 142 -cu.: d y 5 Tr`eeof co-airse, matter. Alc- or or Shrd-dde"d d dried Dot u"se in,fine, tul ffl� a . r , e & ,App.1 y with -Bark ThLO'ch, biovvdr, 611p hand!,t, by hand. Wh6lifiber ni JCJJ:Js the Only available mt l h duriti Pedods wbeil straw 9 .. Lild. Pwina, pto211,b pr. 5 ibs./1000 sq. I. .0 : ' :' $6, u , r I c . e ..val, 1992 E&SC AND SWM PLANS D 02/28/19 FOR APPROVAL C 02/20/19 FOR REVIEW B 01/23/19 FOR REVIEW Lj A 11/26/18 1 FOR REVIEW fie.tp Dewberry re.'960? Dewberry Engineers Inc. 4805 Lake Brook Drive, Suite 200 Glen Allen, VA 23060 Phone: 804.290.7957 Fax: 804.290.7928 www.dewberry.com en"140- SALTH 6P N, Ir4o, 111� DEREK R. MARSHALL t LacN___�� 0 0. 10 14NAl .9 " E Cs DRAWN BY: ARB REVIEWED BY: HGS CHECKED BY: DRM PROJECT NUMBER: 50108352 SITE ADDRESS: 5941 ROCKFISH GAP TPKE CROZET, VA 22932 SHEET TITLE EROSION 8c SEDIMENT CONTROL DETAILS SHEET NUMBER C 2 PROJECT SUMMARY THE PROJECT INCLUDES THE INSTALLATION OF A NEW MONOPOLE AND FENCED EQUIPMENT COMPOUND. THE PROPOSED 35 FT. X 75 FT, COMPOUND IS ENCLOSED BY CHAINLINK FENCE AND CONTAINS A CONCRETE PAD WITH TELECOMMUNICATIONS CABINETS AND OTHER ASSOCIATED EQUIPMENT. THE COMPOUND WILL BE ACCESSIBLE BY A NEW GRAVEL DRIVEWAY THAT CONNECTS TO THE EXISTING PARKING LOT AT W. ALBEMARLE HIGH SCHOOL. Project Name! THE FENCED AREA ENCOMPASSES 2625 SQ. FT. AND THE GRAVEL DRIVEWAY COVERS APPROXIMATELY 4800 SQ. R[ A TOTAL OF APPROXIMATELY 0.32 ACRES WILL BE DISTURBED DURING THE CONSTRUCTION dF THIS PROJECT. Date: THE EXISTING SITE IS PARTIALLY FORESTED AND CONTAINS A SEGMENT OF GRAVEL PATH ON THE OUTSIDE OF THE OHA|NUNK FENCE. THE SITE CONTAINS STEEP SLOPES DRAINING TOWARD ATRIBUTARY T0 STOOKTON CREEK. THE Nm|,� ��l PROPERTY FALLS WITHIN FLOOD ZONE "X^ (AREA OF MINIMAL FLOOD HAZARD) AS SHOWN ON FEWA MAP NO. ---�=-- -°-~-~---- 51003OO237D EFFECTIVE FE8RUARY 4' 2005.Till 0 WATER QUANTITY CHANNEL PROTECTION AND FLOOD PROTECTION ARE ADDRESSED FOR THIS PROJECT IN ACCORDANCE WITH THE P MINIMUM STANDARDS SET OUT IN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM REGULATIONS FOR WATER .17 QUANTITY AND THE ALBEMARLE COUNTY CODE SEC. 17-403. ALL STORMWATER LEAVES THE SITE AS SHEET FLOW, ''--- THE --RM--'T- MANAGEMENT OUTLINED IN VlRQ.A3TORMWATER MANAGEMENT PROGRAM UB CRITERIA, 9YAO25 7O-88D. DRAINAGE AREAS AND FLOW PATHS WILL REMAIN UNCHANGED WITH THE PROPOSED ORAO|NQ. THE ENTIRE 0.32 ACRE SITE WAS ANALYZED IN ORDER TO DETERMINE IF THE OVERALL CHANGE IN FLOW OFF OF THE SITE WILL HAVE ANY IMPACT DOWNSTREAM. THE PEAK STORMY&^J[R DISCHARGE FOR THE SITE WILL INCREASE BY 0.53 CFS FOR THE 1-YEAR STORM, FROM 0.21 TO 0.74 OFS. THERE ARE NO POTENTIAL IMPACTS ON DOWN -GRADIENT PROPERTIES OR RESOURCES DUE TO THE SMALL INCREASE IN STORWWATER RUNOFF ACROSS THE ENTIRE PROJECT SITE OF 0.32 ACRES AND 530 LINEAR FT. THE FLOW IS NOT CONCENTRATED, AND THEREFORE THE INCREASE IN FLOW DOES unr n'^r:-p^w`P"^~qr�m^T AN INCREASE |'wnn-FAnF AT A n|'wcLE POINT OF ANALYSIS. INSTEAD, THE o*LuuLa||un IS |n|Emu /u QUANTIFY AN OVERALL un*muE ON THE SITE FOR THE PURPOSES OF UNDERSTANDING POTENTIAL DOWNSTREAM IMPACTS. NOTE, A MINIMUM TIME OF CONCENTRATION OF 5 MINUTES WAS USED FOR THE PRE- AND POST -DEVELOPED CONDITIONS. ACCORDING TO OH. 870 OF THE Y1RO|NLA STORMWAJER MANAGEMENT PROGRAM UB CRITERIA, 9\AO25-870-68O. IF ALL RUNOFF FROM THE SITE IS SHEET FLOW AND THERE ARE NO IMPACTS DOWNSTREAM THAT WILL CONTRIBUTE TO EROSION, SEDIMENTATION, OR FLOODING, THEN NO FURTHER WATER QUANTITY CONTROLS ARE REQUIRED. THE IMPLEMENTATION OF PROPER EROSION AND SEDIMENT CONTROLS AS SHOWN ON THIS PLAN WILL PREVENT IMPACTS DUE TO EROSION AND SEDIMENTATION. WATER QUALITY WATER QUALITY WILL BE ADDRESSED THROUGH THE PURCHASE OF NUTRIENT OFFSET CREDITS FOR HYDROLOGIC UNIT CODE 02080204, PER Y|RG|N|A DEPARTMENT OF ENVIRONMENTAL QUALITY 9VAO25-820 AND THE ALBEMARLE COUNTY CODE. AN AVAILABILITY AND PRICING LETTER FOR THE REQUIRED NUTRIENT CREDITS HAS BEEN PROVIDED BY EOO-OAP, LLO. EVIDENCE OF PURCHASE WILL BE PROVIDED PRIOR TO LAND DISTURBANCE. ATO7AL OF 0.25 LB/YR OF PHOSPHOROUS REMOVAL IS REQUIRED DUE TO THE 0.32 ACRE PROPOSED D|STURBANCE, PLEASE SEE ' THE V|RQ|N|A RUNOFF REDUCTION METHOD (VRRM) SPREAD SHEET AND NUTRIENT CREDIT AVAILABILITY LETTER ON ' THIS SHEET. -HYDROLOGIC METHODS STORMY0«JER MANAGEMENT DESIGN FOR THIS SITE HAS BEEN DEVELOPED IN ACCORDANCE WITH V|RQ|N|A 3TORk4V&»JER MANAGEMENT PROGRAM REGULATIONS PART ||B .=� cno n^_uo crnnu n/CRITERIA, 0VAC25-870-62 THROUGH -.._~�.,^..�u� �n rn� Mr)AA wn� nnr^/m��muA yy*u��-o/u-w.� ...~.,^~ ..,~~ ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES FOR CROZET, NRQNIA. SOIL GROUPS WERE OBTAINED FROM THE USDA NATIONAL RESOURCES CONSERVATION SERVICES (NRO3) WEB SOIL SURVEY. TIMES OF CONCENTRATION �or=°8- AND RUNOFF CURVE NUMBERS WERE DETERMINED WITH THE 8CS METHOD.THE REQUIRED PHOSPHOROUS LOAD REDUCTION WAS CALCULATED WITH THE YlRO|Nk4 RUNOFF REDUCTION METHOD (VRRM). TIME OF CONCENTRATION CALCULATIONS USE A MAXIMUM SHEETFLOW LENGTH OF 100'. BEFORE CONVERSION TO ANOTHER FLOW TYPE, AS � REQUIRED BY TR-55 USER MANUAL' J/NUARY 2009. WA'aTE ��R�� u��A� �U N �� U U A Milestone Water Quantity Type I/ 24-hr I- YR STORM Rak)fa&--3.05" Summary for Subcatchment IS: Pre-Redev Runoff by SCS TR-20 method, UFI=SCS, Welghted-CN, Time Span. 5.00-20.00 hrs, dt= 0.05 hrs Area (si) ON Description -13,850 63 Weighted Average i3,850 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 5.0 Direct Entry, 013 ot OAS. rTc=5.G,tb1n 0.01 Time (hours) Milestone. Water Quantity Typo824-hf I-yRSTORM Rmhfa#=3.0r Prepared by Dewberry Printed 11125/208 Summary for 8ubomtchmen12S: Post-Dev Runoff =Ell@106mo' Volume- 0.03/ af. oepth> 1.18" Runoff uy000Tm-2omethod, U YvoWxued'O*\Time opm�5,ou-2uooIll ut.unumm Type V24-mrI-vnSTORM na1nfa|I=nu!? DescriptionArea (sf) ON Description 13,850 80 Weighted Average 13,850 100.00% Pervious Area Tc Length Slope Velocity Capacity 5.0 Direct Entry, MIN 8ubcatchmurd2S.- Post-Dev Hydfograph 0.7 0. o. 0. Time (hours) � I �mSi� MOt /trieus, Pre�kef)avaloprnentTN Load os . t-wDevelopment Project (Treatment Volume and Loads) ' Specs Linear project? No Land cover areas �en tered correctly? ^"t"«""5^=a, I bed~°ea e"*e^~d° ^ -ad Turf ~=_=, Logai—~^._-_I ,Purposes— - , ^- ` `-eiAiI ro� .� �. Total Nitrogen (For Informatirill Purppse;;i POST -DEVELOPMENT: LOAD yr) NUTRIENT CREDIT AVAILABILITY LETTERS [�NT��\/ /�(lk�K�U��|/��T|(lN ,�[��\/|(`[�� INC.`-.`..`^-'` =°.`..,.`^.".`"`..°., .~^-.`,.~^_~� .`~ 6600 ROCKLEDGE, DRIVE, SUITE 550 MILESTONE : urnuu�u~�� x ��x�u� ��UU��U��~U��- ��x�xxmx^�xmn.�x_^xx�ron�� F��U ��~� ��lF�� u nu~nm x u�u� �nx WESTERN o u~u uxm ��U ��J��U �� U�� U �nm~��~u�x�nxvm�m~ HIGH x SCHOOL E&SC AND SWM PLANS D 02/28/19 FOR APPROVAL C 02/20/19 FOR REVIEW A 11/26/18 FOR REVIEW Dewberry Dewberry Engineers Inc. 4805 Lake Brook Drive, Suite 200 Glen Allen, VA 23060 Phone:804.u8O.7e57 Fax 804.280J928 DRAWN BY: ARB REVIEWED BY: HGS CHECKED BY: DRM PROJECT NUMBER: 50108352 SITE ADDRESS: ��(� � 1 []�l��L�[-|��LJ /� � [} 7-[]L�[_ ��7�� | |\L/��[�| |`]| | L��[- | [- [\L- CR O-7[7- VA /\ 22932 F�� TITLE STORMWATER K��KJ��[k�[KJ7- �� | \J| \|V| YY�\ | L-| \ MANAGEMENT | K]/\[][JAT|\/E & CALCULATIONS || A-T|OK]S I SHEET NUMBER