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HomeMy WebLinkAboutWPO201700071 Plan - VSMP WPO VSMP 2018-04-064 <* m F7/1---- 0 LD TRAI L Vi LLAG EREVISIONS COUNTY COMMENTS MARCH 5, 2015 DATE October 5, 201 7 SCALE `� = 000' CONTOUR INTERVAL N/A Z W J 0 W N _- ; _ >� W0<w W, ,� 2 < 0 FILE NUMBER $053 SHEET 1 Of � 1 SITE DATA OWNER /DEVELOPER: MARCH MOUNTAIN PROPERTIES LLC CONTACT.- DAVE BROCKMAN SHEET INDEX 1005 HEATHERCROFT CIRCLE, SUITE 400 CELL: (702)-985-9088 CROZET, VA 22932 daveCs�oldtrailvillage. com SHEET I COVER SHEET PLAN PREPARER: ROUDABUSH, GALE, &ASSOCIATES 914 MONTICELLO ROAD SHEET � � 0) i si �i LL 2 EXISIIING CONDITIONS/SOILS MAPR_ CHARLOTTESVILLE, VA. 22902 (434)-977-0205 SHEET 3 EROSION CONTROL PHASE 1 TAX MAP PARCEL No: 55E-01-22-0 SHEET � EROSION CONTROL PHASE 2 PARCEL AREA: 12.02 ACRES SHEET 5 OVERALL DRAINAGE MAPLoc 9 ZONING: NEIGHBORHOOD MODEL DISTRICT IN ACCORDANCE WITH PROFFERS OF ZMA 2015-00001 APPROVED FEBRUARY 1, 2016 SHEET STORM � 48 (O -j z -j C\1 � 6 EROSION CONTROL NARRATIVE &DETAILS USE: SINGLE FAMILY ATTACHED UNITS SHEET % -EROSION CONTROL NOTES &DETAILS GROSS RESIDENTIAL DENSITY. 3.8 UNIT/ACRE SHEET $ BMP CONVERSION NOTES &DETAILSWAT R M �� !Q MAGISTERIAL DISTRICT. WHITE HALL MAGISTERIAL DISTRICT SHEET & ROSION CONTROL P N :SWS.6q e0) Lu Z _'j - :�_) 0. 0:�. p q i 9 ---ADEQUATE OUTFALL ANALYSIS/SWM NOTES &DETAILS.� STORMWATER MANAGEMENT- AS DEFINED BY THE OVERALL STORMWATER MASTER PLAN, APPROVED 4/25/2016 SHEET' 1® LANDSCAPE PLAN/NOTESLA . WP02015600009 SHEET 11 MITIGATION PLAN/NOTES0 WATERSHED: LICKINGHOLE CREEK TOPOGRAPHY: LOUISA AERIAL SURVEYS, AUGUST 2012 ROUDABUSH GALE &• ASSOC. TOPOGRAPHIC FIELD SURVEY FROM JUNE 2015 GENERAL CONSTRUCTION NOTES FOR � E v �`a EROSION AND SEDIMENT CONTROL PLANS BENCHMARK.• STORM SEWER INLET TOP - 695. 13 j � r � - - HORIZONTAL -NAD 83 � � "_. ` ���11 " 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE DATUM: VERTICAL NAVD 88, H ,-` ,\ ;,• ,,✓i,\ PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND ` � ,.,f,, `' :, / �. �'/ DISTURBING ACTIVITY, AND QNE WEEK PRIOR TO THE FINAL INSPECTION. • EXIST WITHIN THE PROPERTY LIMITS, BUT OUTSIDE OF THE PROJECT LIMITS ,�''"� � `` '� t ,..- �.. � "�' ' CRITICAL SLOPES. CRITICAL SLOPES � j, �;; `, 2. ALL ERASION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED -2 ACCORDING TO MINIMUM S D TAN ARDS AND SPECIFICATIONS OF THE VIRGINIA E �� \, ;' ROSION AND ' � �� \` SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS yr 625-02-00 EROSION AND FLOODPLAIN: THIS PROJECT IS LOCATED WITHIN ZONE X AS SHOWN ON FLOOD INSURANCE RATE °' �" f09 COMMUNITY PANEL NUMBER 510003C 0237 D. EFFECTIVE DATE: FEBRUARY 4. '., ,% �:; EDTMENT S CONTROL REGULATIONS MAP. ,�\ yi � 3. ALL cROSIQN AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS .2005. `---- _ `., "' THE FIRST STEP IN CLEARING. ` __ �`/'` 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED LANDSCAPING: SEE LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND '\,/ 3 s.. -��� � � ,` ON THE SITE AT ALL TIMES. " �/)s+ �" 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON DETAILS '' J ,„ GaA ) THE R THESE PLANS (INCLUDING, BUT NOT LIMITED T0, OFF-SITE BORROW OR WASTE AREAS 4 coN�rRACTo s CEL A 1. � , , , ; N TO THE OWNER NO EVIDENCE OF BURIAL SITE WAS FOUND ON THIS PORTION OF PAR R HALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLA FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 3, j: - 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION ' `,,; '� ,>,. � CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS .THE STREAM BUFFER(S) SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE THE ALBEMARLE COUNTY WATER -- I- - , ,, � s - �, � � DETERMINED BY THE PLAN APPROVING AUTHORITY. PROTECTION ORDINANCE. ',' - __ ..... ­­_,� �� ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ?.,,T ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL THIS SITE IS NOT LOCATED WITHIN AN AGRICULTURAL -FORESTAL DISTRICT. ,° _:_111- , ,-' �\ ✓ ;` '�� FINAL STABILIZATION IS ACHIEVED. ""°' F �' 8 EWATERING OPERATION WATER WILL BE PUMPED INTO AN APPROVED FILTERING M...� DURING D S THIS SITE IS LOCATED WITHIN THE WATERSHED OFA PUBLIC WATER SUPPLY RESERVOIR. � z L DEVICE' 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTRQL MEASURES PERIODICALLY AND \�� , �. AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANU ..__ 11 ,. � � -- HE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE TO MAINTAIN T GENERAL EROSION CONTROL NOTES / -' IMMEDIATELY. �' -; f0 ALL FTLL MATERIAL TO 8E TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA WORK AREA PROTECTION &MAINTENANCE � ,; �.. RT MATERIALS ONL , FREE OF ROOTS, STUMP WOOD, RUBBISH, AND OTHER . ALL FENCES REQUIRED TO BE REMOVED OR DISTURBED BY CONSTRUCTION SHALL BE SALVAGECI STORED, PROTECTED AND - � "" ' -'\ 1 -. .,..._ _..... .. \..,' ;' �. ,-' �.�. „' 12. BORROWBO IN E Y S H RE -INSTALLED BY CONTRACTOR AT THE DIRECTION OF AND LOCATION DESIGNATED BY THE PROJECT MANAGER. IF SUCH FENCE " " / ;'' w-•� ..,� '�" ECLAIMED WITHIN 7 DAYS OF COMPLETION PER R WASTE ANEAS ARE TO BE R ' ' ANCE SE TION .1.28. MATERIAL CANNOT BE REUSED DUE TO DAMAGE CAUSED BY CONTRACTOR, CONTRACTOR SHALL (INSTALL NEW FENCE OF THE SAME 13 '', \� � " _ MATERIALSCSHALLSBE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF •, ING ORD TYPE OF MATERIAL. TEMPORARY FENCING REQUIRED BY PRIVATE PROPERTY OWNERS SHALL BE PROVIDED BY CONTRACTOR. ;-- ALL INERT CONTRACTOR IS ADVISED TO CONTACT PROPERTY OWNERS AT LEAST FORTY-EIGHT (48) HOURS IN ADVANCE- OF REMOVING ANY � � 14. RIAL-TYPE POWER E(�UIPMENT SH L ' THE CODE OF AL'3EMARLE ' -' , - -- BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUST AL FENCE IN ORDER TO COORDINATE RELOCATION AND/OR PROTECTION OF ANY ANIMALS, AND TO ESTABLESH AND 'CONFIRM WITH �- ' '`,' f \ - - ;`�"" BE LIMITED TO THE HOURS OF 7: 00 AM TO 9: 00 PM. THE OWNER THE PRE -CONSTRUCTION CONDITION OF ANY FENCE TO BE REMOVED, DISTURBED OR REPLACED. � - 15. 0 OT APPROVAL AND ANY ' I "' 11 ­` 1, ­ ' MINIMIZE TO 2. CONTRACTOR IS PERMITTED TO WORK IN THE PUBLIC RIGHT-OF-WAY FOLLOWING ISSUANCE F VDOT - ' � ' " ' FILL, OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT TEMPORARY OR PERMANENT EASEMENT (FOLLOWING VERIFICATION OF EXISTENCE OF EASEMENT) SHOWN ON: THE PLANS. HOWEVER, - � ,` MA^FETOSADJAOCENTOLAND°ANDTOMPROVEMENTSNYANDZDA°MAGE TORAONYSPUBLIC MAINTAINS LATERAL PHYSICAL DA PROPERTY OWNERS FORTY-EIGHT 48 HOURS PRIOR TO WORKING ON ANY PRIVATE PROPERTY TO `' STREET BECAUSE= OF SLIDES, SINKING, OR COLLAPSE. CONTRACTOR SHALL NOTIFY O ( ) � �. 5," 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT 0 DETERMINE A STORAGE AREA FOR MATERIALS IF NEEDED. COORDINATION OF ACCESS TO ` 'GAIN AND COORDINATE ACCESS AND T __ _..... -;--.. -- `, `"' ';;-'"'" � , TQ PERMANENT STORMWATER MANAGEMENT FACILITIES, WHERE APPLICABLE, ALL EROSION PUBLIC RIGHT-OF-WAY AND STORAGE OF MATERIALS THEREON SHALL BE COORDINATED WITH VDOT AND THE PROJECT MANAGER. � ;;� +: '' "'' - OF THE SALE QF ANY LO , ;; CONTROL ,MEASURES REQUIRED BY THIS PLAN REGARDLESS T CONTRACTOR'S FAILURE TO SO NOTIFY AND COORDINATE WITH PROPERTY OWNERS AND/OR THE PROJECT `MANAGER MAY RESULT % ': _,_....- '` ,' Q�' `' UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. IN DELAYS. '; ,� !'"! �, ;;,,,GO�� 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO D ORDERLY APIPEARANCE AT ALL "TIMES. ALL -` I = � '' "°= �' �" RUARY TO CONSIST A 3. CONTRACTOR SHALL, AT HIS EXPENSE, MAINTAIN THE WORK SITE IN A CLEAN AN ', �:::; ,,-. ----` =`',- - = '' ,. 50/50 MTXLOF/ANNUALARYEGRASSEANDNCEREAL WINTER BRYETOOREBN MARCH AND APRIL TO DEBRIS AND SURPLUS MATERIAL COLLECTED SHALL BE DISPOSED OF OFF THE WORK SITE BY CONTRACTOR, AT HIS EXPENSE. ,.,�� r. DRIVEWAYS POLES, SIGNS RIGHT-OF-WAY ' N 4. EXISTING LAWNS, TREES, SHRUBS, FENCES, UTILITIES, CULVERTS, WALLS, WALKS, _ ,;' / - `' - - HAI�;JJTO BEEAPPLIEDYATH80ULBSAUG MONUMENTS MAILBOXES AND THE LIKE SHALL BE PROTECTED FROM DAMAGE DURING THE WORE. ANY DAMAGE CAUSED TO SUCH _�, -'"` ,..._. ,>' ='" TIVES AR OBJECT TO ;' ST TO CONS 11 ,/ •' ED Br THE COUNTY EROSION CONTRO�OINSPECTORNAS / T OF GERMAN MILLET. ITEMS SHALL BE REPAIRED OR REPLACED BY CONTRACTOR AT NO ADDITIONAL COST. PROPERTY PINS DISTURBED BY CONTRACTOR g8 _.. _, ' PERMAN�NT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND THAT ARE NOT SHONIN ON THE PLANS TO BE DISTURBED SHALL BE RESTORED BY A LICENSED SURVEYOR AT CONTRACTOR'S """ `' ' "' ` EXPENSE. � '\ --' -., �, '� OCK TNCORPORATEDUINTOATHERTOP 4I6EIN5HESSOFLSOBL. AFERTI°LIZERgSHABL/BEOAPPLIED AT 5. CONTRACTOR SHALL EMPLOY EROSION CONTROL DEVICES AND METHODS AS REQUIRED TO MEET THE REQUIREMENTS AND INTENT Z' ,. --- _. ;. '" � `�' <'; �� "; - - T SEEDING SHALL 1000 LBS/ACRE AND CONSIST OF A 10 20 10 NUTRIENT MIX. PERMANEN OF THE LOCAL EROSION CONTROL ORDINANCE. CONTRACTOR SHALL PROVIDE THE NECESSARY DIIVERSION DITCHES, DIKES OR -- \ ,Q BE APPLIED AT 180 LBS/ACRE AND CONSIST of 115% KENTUCKY 31 OR TALL FESCUE AND TEMPORARY CULVERTS REQUIRED TO PREVENT MUD AND DEBRIS FROM BEING WASHED ONTO THE STREETS OR PROPERTY. �" .. ', .� � 22 � 0-5°/8� PE RYELRERS� TR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED ' 0 P EVENT MUD OR DUST FROM BEING DEPOSITED ON STREETS. NO AREA � ` ENNIAL CONTRACTORS VEHICLES SHALL BE KEPT CLEAN T R � ., I,'�.,, �. -- "" ?'�, � EROSOIONBCONTROL INSPECTOR •VES ARE SUBJEC TO BE A OVED B T PPR Y THE COUNTY SHALL BE LEFT DENUDED FOR MORE THAN SEVEN (7) CALENDAR DAYS. '�. '' � 11 i I 1',� 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. �' I � ; ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES I5 TO BE REPAIRED IMMEDIATELY. ,. _ r�T P - VEGETATION Q Rte L50 , _ ... WITH `, DIMENT.SALLESEOEDED AREASE�REHTO BE�RESEEDEDWWHENT�ECESSARYUMO ACHIEVEED Z '_-- I ,,,''`., -, `; ,. .-% -� GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING i 1. PRIOR TO REMOVING ANY VEGETATION, CONTRACTOR SHALL MEET WITH THE PROPERTY OWNERS AND THE PROJECT MANAGER TO I - , - ISSION TO REMOVE VEGETATION REQUIRED TO DO THE WORK. O -- • REVIEW THE LIMITS OF CONSTRUCTION AND OBTAIN PERM I`� " " _.. +, �- 5 1 -".__,, ;., -:.." ": ` � 20. AL°IMEMPORARYAEROSIONRANDISEDIMENT CONTROLNM°EASURESEARERTO BEMRDMOVEDYWITHIN 2. TREE AND PLANT ROOTS OR BRANCHES THAT MAY INTERFERE WITH THE WORK SHALL BE TRIMMED OR CUT ONLY WITH THE � i _ - - - --.. _... _ __ GER NEEDS , APPROVAL OF THE PROJECT MANAGER. ANY TREES OR PLANTS WHICH ARE SHOWN TO REMAIN THAT DO NOT INTERFERE WITH � 1 - SUBJECT TO APPROVAL BY THE COU '' '`. `., : `. ': _. NTY OSION CONTROL INSPEC THE WORK, BUT ARE DAMAGED BY CONTRACTOR OR HIS SUBCONTRACTORS, SHALL BE REPAIRED OR REPLACED BY CONTRACTOR = � �` `""' ' ER TOR AT NO ADDITIONAL COST. 3. CONTRACTOR SHALL CLEAN UP, RESTORE, SEED AND MAINTAIN ALL DISTURBED AREAS IMMEDIATELY UPON COMPLETION OF WORK �' � � ''' . ON EACH SITE. TOPSOIL, -SEED, FERTILIZER AND MULCH SHALL BE PLACED IN ACCORDANCE WITH ESC AUTHORITY STANDARDS ON VICINITY MAP ALL DISTURBED AREAS. A PERMANENT STAND OF GRASS ADEQUATE TO PREVENT EROSION SHALL BE ESTABLISHED PRIOR TO FINAL ACCEPTANCE. 4. THE ACT OF RESEEDING SHALL NOT QUALIFY AS "STABILIZED". THE CONTRACTOR SHALL BE RESPONSIBLE TO ESTABLISH SCALE: * �� 1 � FEET GENERAL CONSTRUCTION NOTES FOUR PPPR®v�� ounky VEGETATION, NOT SIMPLY APPLY SEED AND MATERIALS. ti7V/'u.G I' 1- STORMWATEIR MANAGEMENT PLANS by rhe �Ibe�"'��menrOePacrmel� EROSION AND SEDIMENT CONTROL LEGEND m�n'ry �eve�o� 1 . ALL DAMS AND CONSTRUCTED FTLL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY 1�Sr�.�._-----'',14 ", ,� �-- it 0 w J 0 1� ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL SAF 3.01 n n SAFETY FENCE AN6EO�E5HNOICALMENGINEER�RA GEOTECHNICAL ENGINEEREISATOTBEBPRESENOVED BY ,�t,001, e�� PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS DURING COPJSTRUCTION OF DiAMS. OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER EROSION AND SEDIMENT CONTROL REGULATIONS. PAVED CONSTRUCTION p MANAGEMENT FACILITIES. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION PCE 3.02 '': • •, . `••�• • ENTRANCE W/ WASH RACK WR 3. FOR TEMPORARY SEDIP4ENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK IF APPLICABLE PERMANENT STQRMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE �Tg of PRIOR TO THE FINAL INSPECTION. PLACE UNTl"L THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED ES -3: ALL EROSION AND SEDIMENT .CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN SSF 3.05 SUPER SILT FENCE FROM THE couNTY ERASION coNTROL INSPECTOR. ��' � J?,�� CLEARING. 11 0 pp- 11110- x� � ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT � �� °-'� ALL TIMES. � Vim^ ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS I P 3.07 I P INLET PROTECTION (INCLUDING, BUT NOT LIMITED T0, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A m .' L. ,agc�.art SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN 116 Lic. No. ,�, ,�, 22841 �fiv REVIEWING AUTHORITY. Dv 3.12 INLET PROTECTION ��' 1� ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES 4SSIONAL ��G NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -7; ALL DISTURBED ARES ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURE'S AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION. HAS BEEN ACHIEVED. OP 3.18 QP OUTLET PROTECTION ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9; THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. TS 3.31 TS TEMPORARY SEEDING APPROVALS T P S 3.32 PS PERMANENT SEEDING DEPARTMENT COMMUNITY OF PLANNING / ZONING L����_ DEVELOPMENT g�M 3.36 rM SOIL STABILIZATION/BLANKET MATTING ENGINEERING D� 3.39 D I 4 r ., Cr Q � � � r r Q • , i ,o( r C DUST CONTROL TOTAL DISTURBED AREA = 5.87 ACRES � 4 <* m F7/1---- 0 LD TRAI L Vi LLAG EREVISIONS COUNTY COMMENTS MARCH 5, 2015 DATE October 5, 201 7 SCALE `� = 000' CONTOUR INTERVAL N/A Z W J 0 W N _- ; _ >� W0<w W, ,� 2 < 0 FILE NUMBER $053 SHEET 1 Of � 1 SITE DATA OWNER /DEVELOPER: MARCH MOUNTAIN PROPERTIES LLC CONTACT.- DAVE BROCKMAN SHEET INDEX 1005 HEATHERCROFT CIRCLE, SUITE 400 CELL: (702)-985-9088 CROZET, VA 22932 daveCs�oldtrailvillage. com SHEET I COVER SHEET PLAN PREPARER: ROUDABUSH, GALE, &ASSOCIATES 914 MONTICELLO ROAD SHEET � � 0) i si �i LL 2 EXISIIING CONDITIONS/SOILS MAPR_ CHARLOTTESVILLE, VA. 22902 (434)-977-0205 SHEET 3 EROSION CONTROL PHASE 1 TAX MAP PARCEL No: 55E-01-22-0 SHEET � EROSION CONTROL PHASE 2 PARCEL AREA: 12.02 ACRES SHEET 5 OVERALL DRAINAGE MAPLoc 9 ZONING: NEIGHBORHOOD MODEL DISTRICT IN ACCORDANCE WITH PROFFERS OF ZMA 2015-00001 APPROVED FEBRUARY 1, 2016 SHEET STORM � 48 (O -j z -j C\1 � 6 EROSION CONTROL NARRATIVE &DETAILS USE: SINGLE FAMILY ATTACHED UNITS SHEET % -EROSION CONTROL NOTES &DETAILS GROSS RESIDENTIAL DENSITY. 3.8 UNIT/ACRE SHEET $ BMP CONVERSION NOTES &DETAILSWAT R M �� !Q MAGISTERIAL DISTRICT. WHITE HALL MAGISTERIAL DISTRICT SHEET & ROSION CONTROL P N :SWS.6q e0) Lu Z _'j - :�_) 0. 0:�. p q i 9 ---ADEQUATE OUTFALL ANALYSIS/SWM NOTES &DETAILS.� STORMWATER MANAGEMENT- AS DEFINED BY THE OVERALL STORMWATER MASTER PLAN, APPROVED 4/25/2016 SHEET' 1® LANDSCAPE PLAN/NOTESLA . WP02015600009 SHEET 11 MITIGATION PLAN/NOTES0 WATERSHED: LICKINGHOLE CREEK TOPOGRAPHY: LOUISA AERIAL SURVEYS, AUGUST 2012 ROUDABUSH GALE &• ASSOC. TOPOGRAPHIC FIELD SURVEY FROM JUNE 2015 GENERAL CONSTRUCTION NOTES FOR � E v �`a EROSION AND SEDIMENT CONTROL PLANS BENCHMARK.• STORM SEWER INLET TOP - 695. 13 j � r � - - HORIZONTAL -NAD 83 � � "_. ` ���11 " 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE DATUM: VERTICAL NAVD 88, H ,-` ,\ ;,• ,,✓i,\ PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND ` � ,.,f,, `' :, / �. �'/ DISTURBING ACTIVITY, AND QNE WEEK PRIOR TO THE FINAL INSPECTION. • EXIST WITHIN THE PROPERTY LIMITS, BUT OUTSIDE OF THE PROJECT LIMITS ,�''"� � `` '� t ,..- �.. � "�' ' CRITICAL SLOPES. CRITICAL SLOPES � j, �;; `, 2. ALL ERASION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED -2 ACCORDING TO MINIMUM S D TAN ARDS AND SPECIFICATIONS OF THE VIRGINIA E �� \, ;' ROSION AND ' � �� \` SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS yr 625-02-00 EROSION AND FLOODPLAIN: THIS PROJECT IS LOCATED WITHIN ZONE X AS SHOWN ON FLOOD INSURANCE RATE °' �" f09 COMMUNITY PANEL NUMBER 510003C 0237 D. EFFECTIVE DATE: FEBRUARY 4. '., ,% �:; EDTMENT S CONTROL REGULATIONS MAP. ,�\ yi � 3. ALL cROSIQN AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS .2005. `---- _ `., "' THE FIRST STEP IN CLEARING. ` __ �`/'` 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED LANDSCAPING: SEE LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND '\,/ 3 s.. -��� � � ,` ON THE SITE AT ALL TIMES. " �/)s+ �" 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON DETAILS '' J ,„ GaA ) THE R THESE PLANS (INCLUDING, BUT NOT LIMITED T0, OFF-SITE BORROW OR WASTE AREAS 4 coN�rRACTo s CEL A 1. � , , , ; N TO THE OWNER NO EVIDENCE OF BURIAL SITE WAS FOUND ON THIS PORTION OF PAR R HALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLA FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 3, j: - 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION ' `,,; '� ,>,. � CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS .THE STREAM BUFFER(S) SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE THE ALBEMARLE COUNTY WATER -- I- - , ,, � s - �, � � DETERMINED BY THE PLAN APPROVING AUTHORITY. PROTECTION ORDINANCE. ',' - __ ..... ­­_,� �� ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ?.,,T ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL THIS SITE IS NOT LOCATED WITHIN AN AGRICULTURAL -FORESTAL DISTRICT. ,° _:_111- , ,-' �\ ✓ ;` '�� FINAL STABILIZATION IS ACHIEVED. ""°' F �' 8 EWATERING OPERATION WATER WILL BE PUMPED INTO AN APPROVED FILTERING M...� DURING D S THIS SITE IS LOCATED WITHIN THE WATERSHED OFA PUBLIC WATER SUPPLY RESERVOIR. � z L DEVICE' 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTRQL MEASURES PERIODICALLY AND \�� , �. AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANU ..__ 11 ,. � � -- HE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE TO MAINTAIN T GENERAL EROSION CONTROL NOTES / -' IMMEDIATELY. �' -; f0 ALL FTLL MATERIAL TO 8E TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA WORK AREA PROTECTION &MAINTENANCE � ,; �.. RT MATERIALS ONL , FREE OF ROOTS, STUMP WOOD, RUBBISH, AND OTHER . ALL FENCES REQUIRED TO BE REMOVED OR DISTURBED BY CONSTRUCTION SHALL BE SALVAGECI STORED, PROTECTED AND - � "" ' -'\ 1 -. .,..._ _..... .. \..,' ;' �. ,-' �.�. „' 12. BORROWBO IN E Y S H RE -INSTALLED BY CONTRACTOR AT THE DIRECTION OF AND LOCATION DESIGNATED BY THE PROJECT MANAGER. IF SUCH FENCE " " / ;'' w-•� ..,� '�" ECLAIMED WITHIN 7 DAYS OF COMPLETION PER R WASTE ANEAS ARE TO BE R ' ' ANCE SE TION .1.28. MATERIAL CANNOT BE REUSED DUE TO DAMAGE CAUSED BY CONTRACTOR, CONTRACTOR SHALL (INSTALL NEW FENCE OF THE SAME 13 '', \� � " _ MATERIALSCSHALLSBE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF •, ING ORD TYPE OF MATERIAL. TEMPORARY FENCING REQUIRED BY PRIVATE PROPERTY OWNERS SHALL BE PROVIDED BY CONTRACTOR. ;-- ALL INERT CONTRACTOR IS ADVISED TO CONTACT PROPERTY OWNERS AT LEAST FORTY-EIGHT (48) HOURS IN ADVANCE- OF REMOVING ANY � � 14. RIAL-TYPE POWER E(�UIPMENT SH L ' THE CODE OF AL'3EMARLE ' -' , - -- BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUST AL FENCE IN ORDER TO COORDINATE RELOCATION AND/OR PROTECTION OF ANY ANIMALS, AND TO ESTABLESH AND 'CONFIRM WITH �- ' '`,' f \ - - ;`�"" BE LIMITED TO THE HOURS OF 7: 00 AM TO 9: 00 PM. THE OWNER THE PRE -CONSTRUCTION CONDITION OF ANY FENCE TO BE REMOVED, DISTURBED OR REPLACED. � - 15. 0 OT APPROVAL AND ANY ' I "' 11 ­` 1, ­ ' MINIMIZE TO 2. CONTRACTOR IS PERMITTED TO WORK IN THE PUBLIC RIGHT-OF-WAY FOLLOWING ISSUANCE F VDOT - ' � ' " ' FILL, OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT TEMPORARY OR PERMANENT EASEMENT (FOLLOWING VERIFICATION OF EXISTENCE OF EASEMENT) SHOWN ON: THE PLANS. HOWEVER, - � ,` MA^FETOSADJAOCENTOLAND°ANDTOMPROVEMENTSNYANDZDA°MAGE TORAONYSPUBLIC MAINTAINS LATERAL PHYSICAL DA PROPERTY OWNERS FORTY-EIGHT 48 HOURS PRIOR TO WORKING ON ANY PRIVATE PROPERTY TO `' STREET BECAUSE= OF SLIDES, SINKING, OR COLLAPSE. CONTRACTOR SHALL NOTIFY O ( ) � �. 5," 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT 0 DETERMINE A STORAGE AREA FOR MATERIALS IF NEEDED. COORDINATION OF ACCESS TO ` 'GAIN AND COORDINATE ACCESS AND T __ _..... -;--.. -- `, `"' ';;-'"'" � , TQ PERMANENT STORMWATER MANAGEMENT FACILITIES, WHERE APPLICABLE, ALL EROSION PUBLIC RIGHT-OF-WAY AND STORAGE OF MATERIALS THEREON SHALL BE COORDINATED WITH VDOT AND THE PROJECT MANAGER. � ;;� +: '' "'' - OF THE SALE QF ANY LO , ;; CONTROL ,MEASURES REQUIRED BY THIS PLAN REGARDLESS T CONTRACTOR'S FAILURE TO SO NOTIFY AND COORDINATE WITH PROPERTY OWNERS AND/OR THE PROJECT `MANAGER MAY RESULT % ': _,_....- '` ,' Q�' `' UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. IN DELAYS. '; ,� !'"! �, ;;,,,GO�� 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO D ORDERLY APIPEARANCE AT ALL "TIMES. ALL -` I = � '' "°= �' �" RUARY TO CONSIST A 3. CONTRACTOR SHALL, AT HIS EXPENSE, MAINTAIN THE WORK SITE IN A CLEAN AN ', �:::; ,,-. ----` =`',- - = '' ,. 50/50 MTXLOF/ANNUALARYEGRASSEANDNCEREAL WINTER BRYETOOREBN MARCH AND APRIL TO DEBRIS AND SURPLUS MATERIAL COLLECTED SHALL BE DISPOSED OF OFF THE WORK SITE BY CONTRACTOR, AT HIS EXPENSE. ,.,�� r. DRIVEWAYS POLES, SIGNS RIGHT-OF-WAY ' N 4. EXISTING LAWNS, TREES, SHRUBS, FENCES, UTILITIES, CULVERTS, WALLS, WALKS, _ ,;' / - `' - - HAI�;JJTO BEEAPPLIEDYATH80ULBSAUG MONUMENTS MAILBOXES AND THE LIKE SHALL BE PROTECTED FROM DAMAGE DURING THE WORE. ANY DAMAGE CAUSED TO SUCH _�, -'"` ,..._. ,>' ='" TIVES AR OBJECT TO ;' ST TO CONS 11 ,/ •' ED Br THE COUNTY EROSION CONTRO�OINSPECTORNAS / T OF GERMAN MILLET. ITEMS SHALL BE REPAIRED OR REPLACED BY CONTRACTOR AT NO ADDITIONAL COST. PROPERTY PINS DISTURBED BY CONTRACTOR g8 _.. _, ' PERMAN�NT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND THAT ARE NOT SHONIN ON THE PLANS TO BE DISTURBED SHALL BE RESTORED BY A LICENSED SURVEYOR AT CONTRACTOR'S """ `' ' "' ` EXPENSE. � '\ --' -., �, '� OCK TNCORPORATEDUINTOATHERTOP 4I6EIN5HESSOFLSOBL. AFERTI°LIZERgSHABL/BEOAPPLIED AT 5. CONTRACTOR SHALL EMPLOY EROSION CONTROL DEVICES AND METHODS AS REQUIRED TO MEET THE REQUIREMENTS AND INTENT Z' ,. --- _. ;. '" � `�' <'; �� "; - - T SEEDING SHALL 1000 LBS/ACRE AND CONSIST OF A 10 20 10 NUTRIENT MIX. PERMANEN OF THE LOCAL EROSION CONTROL ORDINANCE. CONTRACTOR SHALL PROVIDE THE NECESSARY DIIVERSION DITCHES, DIKES OR -- \ ,Q BE APPLIED AT 180 LBS/ACRE AND CONSIST of 115% KENTUCKY 31 OR TALL FESCUE AND TEMPORARY CULVERTS REQUIRED TO PREVENT MUD AND DEBRIS FROM BEING WASHED ONTO THE STREETS OR PROPERTY. �" .. ', .� � 22 � 0-5°/8� PE RYELRERS� TR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED ' 0 P EVENT MUD OR DUST FROM BEING DEPOSITED ON STREETS. NO AREA � ` ENNIAL CONTRACTORS VEHICLES SHALL BE KEPT CLEAN T R � ., I,'�.,, �. -- "" ?'�, � EROSOIONBCONTROL INSPECTOR •VES ARE SUBJEC TO BE A OVED B T PPR Y THE COUNTY SHALL BE LEFT DENUDED FOR MORE THAN SEVEN (7) CALENDAR DAYS. '�. '' � 11 i I 1',� 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. �' I � ; ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES I5 TO BE REPAIRED IMMEDIATELY. ,. _ r�T P - VEGETATION Q Rte L50 , _ ... WITH `, DIMENT.SALLESEOEDED AREASE�REHTO BE�RESEEDEDWWHENT�ECESSARYUMO ACHIEVEED Z '_-- I ,,,''`., -, `; ,. .-% -� GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING i 1. PRIOR TO REMOVING ANY VEGETATION, CONTRACTOR SHALL MEET WITH THE PROPERTY OWNERS AND THE PROJECT MANAGER TO I - , - ISSION TO REMOVE VEGETATION REQUIRED TO DO THE WORK. O -- • REVIEW THE LIMITS OF CONSTRUCTION AND OBTAIN PERM I`� " " _.. +, �- 5 1 -".__,, ;., -:.." ": ` � 20. AL°IMEMPORARYAEROSIONRANDISEDIMENT CONTROLNM°EASURESEARERTO BEMRDMOVEDYWITHIN 2. TREE AND PLANT ROOTS OR BRANCHES THAT MAY INTERFERE WITH THE WORK SHALL BE TRIMMED OR CUT ONLY WITH THE � i _ - - - --.. _... _ __ GER NEEDS , APPROVAL OF THE PROJECT MANAGER. ANY TREES OR PLANTS WHICH ARE SHOWN TO REMAIN THAT DO NOT INTERFERE WITH � 1 - SUBJECT TO APPROVAL BY THE COU '' '`. `., : `. ': _. NTY OSION CONTROL INSPEC THE WORK, BUT ARE DAMAGED BY CONTRACTOR OR HIS SUBCONTRACTORS, SHALL BE REPAIRED OR REPLACED BY CONTRACTOR = � �` `""' ' ER TOR AT NO ADDITIONAL COST. 3. CONTRACTOR SHALL CLEAN UP, RESTORE, SEED AND MAINTAIN ALL DISTURBED AREAS IMMEDIATELY UPON COMPLETION OF WORK �' � � ''' . ON EACH SITE. TOPSOIL, -SEED, FERTILIZER AND MULCH SHALL BE PLACED IN ACCORDANCE WITH ESC AUTHORITY STANDARDS ON VICINITY MAP ALL DISTURBED AREAS. A PERMANENT STAND OF GRASS ADEQUATE TO PREVENT EROSION SHALL BE ESTABLISHED PRIOR TO FINAL ACCEPTANCE. 4. THE ACT OF RESEEDING SHALL NOT QUALIFY AS "STABILIZED". THE CONTRACTOR SHALL BE RESPONSIBLE TO ESTABLISH SCALE: * �� 1 � FEET GENERAL CONSTRUCTION NOTES FOUR PPPR®v�� ounky VEGETATION, NOT SIMPLY APPLY SEED AND MATERIALS. ti7V/'u.G I' 1- STORMWATEIR MANAGEMENT PLANS by rhe �Ibe�"'��menrOePacrmel� EROSION AND SEDIMENT CONTROL LEGEND m�n'ry �eve�o� 1 . ALL DAMS AND CONSTRUCTED FTLL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY 1�Sr�.�._-----'',14 ", ,� �-- it 0 w J 0 1� ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL SAF 3.01 n n SAFETY FENCE AN6EO�E5HNOICALMENGINEER�RA GEOTECHNICAL ENGINEEREISATOTBEBPRESENOVED BY ,�t,001, e�� PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS DURING COPJSTRUCTION OF DiAMS. OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER EROSION AND SEDIMENT CONTROL REGULATIONS. PAVED CONSTRUCTION p MANAGEMENT FACILITIES. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION PCE 3.02 '': • •, . `••�• • ENTRANCE W/ WASH RACK WR 3. FOR TEMPORARY SEDIP4ENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK IF APPLICABLE PERMANENT STQRMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE �Tg of PRIOR TO THE FINAL INSPECTION. PLACE UNTl"L THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED ES -3: ALL EROSION AND SEDIMENT .CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN SSF 3.05 SUPER SILT FENCE FROM THE couNTY ERASION coNTROL INSPECTOR. ��' � J?,�� CLEARING. 11 0 pp- 11110- x� � ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT � �� °-'� ALL TIMES. � Vim^ ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS I P 3.07 I P INLET PROTECTION (INCLUDING, BUT NOT LIMITED T0, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A m .' L. ,agc�.art SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN 116 Lic. No. ,�, ,�, 22841 �fiv REVIEWING AUTHORITY. Dv 3.12 INLET PROTECTION ��' 1� ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES 4SSIONAL ��G NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -7; ALL DISTURBED ARES ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURE'S AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION. HAS BEEN ACHIEVED. OP 3.18 QP OUTLET PROTECTION ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9; THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. TS 3.31 TS TEMPORARY SEEDING APPROVALS T P S 3.32 PS PERMANENT SEEDING DEPARTMENT COMMUNITY OF PLANNING / ZONING L����_ DEVELOPMENT g�M 3.36 rM SOIL STABILIZATION/BLANKET MATTING ENGINEERING D� 3.39 D I 4 r ., Cr Q � � � r r Q • , i ,o( r 4 <* m F7/1---- 0 LD TRAI L Vi LLAG EREVISIONS COUNTY COMMENTS MARCH 5, 2015 DATE October 5, 201 7 SCALE `� = 000' CONTOUR INTERVAL N/A Z W J 0 W N _- ; _ >� W0<w W, ,� 2 < 0 FILE NUMBER $053 SHEET 1 Of � 1 SITE DATA OWNER /DEVELOPER: MARCH MOUNTAIN PROPERTIES LLC CONTACT.- DAVE BROCKMAN SHEET INDEX 1005 HEATHERCROFT CIRCLE, SUITE 400 CELL: (702)-985-9088 CROZET, VA 22932 daveCs�oldtrailvillage. com SHEET I COVER SHEET PLAN PREPARER: ROUDABUSH, GALE, &ASSOCIATES 914 MONTICELLO ROAD SHEET � � 0) i si �i LL 2 EXISIIING CONDITIONS/SOILS MAPR_ CHARLOTTESVILLE, VA. 22902 (434)-977-0205 SHEET 3 EROSION CONTROL PHASE 1 TAX MAP PARCEL No: 55E-01-22-0 SHEET � EROSION CONTROL PHASE 2 PARCEL AREA: 12.02 ACRES SHEET 5 OVERALL DRAINAGE MAPLoc 9 ZONING: NEIGHBORHOOD MODEL DISTRICT IN ACCORDANCE WITH PROFFERS OF ZMA 2015-00001 APPROVED FEBRUARY 1, 2016 SHEET STORM � 48 (O -j z -j C\1 � 6 EROSION CONTROL NARRATIVE &DETAILS USE: SINGLE FAMILY ATTACHED UNITS SHEET % -EROSION CONTROL NOTES &DETAILS GROSS RESIDENTIAL DENSITY. 3.8 UNIT/ACRE SHEET $ BMP CONVERSION NOTES &DETAILSWAT R M �� !Q MAGISTERIAL DISTRICT. WHITE HALL MAGISTERIAL DISTRICT SHEET & ROSION CONTROL P N :SWS.6q e0) Lu Z _'j - :�_) 0. 0:�. p q i 9 ---ADEQUATE OUTFALL ANALYSIS/SWM NOTES &DETAILS.� STORMWATER MANAGEMENT- AS DEFINED BY THE OVERALL STORMWATER MASTER PLAN, APPROVED 4/25/2016 SHEET' 1® LANDSCAPE PLAN/NOTESLA . WP02015600009 SHEET 11 MITIGATION PLAN/NOTES0 WATERSHED: LICKINGHOLE CREEK TOPOGRAPHY: LOUISA AERIAL SURVEYS, AUGUST 2012 ROUDABUSH GALE &• ASSOC. TOPOGRAPHIC FIELD SURVEY FROM JUNE 2015 GENERAL CONSTRUCTION NOTES FOR � E v �`a EROSION AND SEDIMENT CONTROL PLANS BENCHMARK.• STORM SEWER INLET TOP - 695. 13 j � r � - - HORIZONTAL -NAD 83 � � "_. ` ���11 " 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE DATUM: VERTICAL NAVD 88, H ,-` ,\ ;,• ,,✓i,\ PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND ` � ,.,f,, `' :, / �. �'/ DISTURBING ACTIVITY, AND QNE WEEK PRIOR TO THE FINAL INSPECTION. • EXIST WITHIN THE PROPERTY LIMITS, BUT OUTSIDE OF THE PROJECT LIMITS ,�''"� � `` '� t ,..- �.. � "�' ' CRITICAL SLOPES. CRITICAL SLOPES � j, �;; `, 2. ALL ERASION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED -2 ACCORDING TO MINIMUM S D TAN ARDS AND SPECIFICATIONS OF THE VIRGINIA E �� \, ;' ROSION AND ' � �� \` SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS yr 625-02-00 EROSION AND FLOODPLAIN: THIS PROJECT IS LOCATED WITHIN ZONE X AS SHOWN ON FLOOD INSURANCE RATE °' �" f09 COMMUNITY PANEL NUMBER 510003C 0237 D. EFFECTIVE DATE: FEBRUARY 4. '., ,% �:; EDTMENT S CONTROL REGULATIONS MAP. ,�\ yi � 3. ALL cROSIQN AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS .2005. `---- _ `., "' THE FIRST STEP IN CLEARING. ` __ �`/'` 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED LANDSCAPING: SEE LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND '\,/ 3 s.. -��� � � ,` ON THE SITE AT ALL TIMES. " �/)s+ �" 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON DETAILS '' J ,„ GaA ) THE R THESE PLANS (INCLUDING, BUT NOT LIMITED T0, OFF-SITE BORROW OR WASTE AREAS 4 coN�rRACTo s CEL A 1. � , , , ; N TO THE OWNER NO EVIDENCE OF BURIAL SITE WAS FOUND ON THIS PORTION OF PAR R HALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLA FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 3, j: - 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION ' `,,; '� ,>,. � CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS .THE STREAM BUFFER(S) SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE THE ALBEMARLE COUNTY WATER -- I- - , ,, � s - �, � � DETERMINED BY THE PLAN APPROVING AUTHORITY. PROTECTION ORDINANCE. ',' - __ ..... ­­_,� �� ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ?.,,T ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL THIS SITE IS NOT LOCATED WITHIN AN AGRICULTURAL -FORESTAL DISTRICT. ,° _:_111- , ,-' �\ ✓ ;` '�� FINAL STABILIZATION IS ACHIEVED. ""°' F �' 8 EWATERING OPERATION WATER WILL BE PUMPED INTO AN APPROVED FILTERING M...� DURING D S THIS SITE IS LOCATED WITHIN THE WATERSHED OFA PUBLIC WATER SUPPLY RESERVOIR. � z L DEVICE' 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTRQL MEASURES PERIODICALLY AND \�� , �. AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANU ..__ 11 ,. � � -- HE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE TO MAINTAIN T GENERAL EROSION CONTROL NOTES / -' IMMEDIATELY. �' -; f0 ALL FTLL MATERIAL TO 8E TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA WORK AREA PROTECTION &MAINTENANCE � ,; �.. RT MATERIALS ONL , FREE OF ROOTS, STUMP WOOD, RUBBISH, AND OTHER . ALL FENCES REQUIRED TO BE REMOVED OR DISTURBED BY CONSTRUCTION SHALL BE SALVAGECI STORED, PROTECTED AND - � "" ' -'\ 1 -. .,..._ _..... .. \..,' ;' �. ,-' �.�. „' 12. BORROWBO IN E Y S H RE -INSTALLED BY CONTRACTOR AT THE DIRECTION OF AND LOCATION DESIGNATED BY THE PROJECT MANAGER. IF SUCH FENCE " " / ;'' w-•� ..,� '�" ECLAIMED WITHIN 7 DAYS OF COMPLETION PER R WASTE ANEAS ARE TO BE R ' ' ANCE SE TION .1.28. MATERIAL CANNOT BE REUSED DUE TO DAMAGE CAUSED BY CONTRACTOR, CONTRACTOR SHALL (INSTALL NEW FENCE OF THE SAME 13 '', \� � " _ MATERIALSCSHALLSBE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF •, ING ORD TYPE OF MATERIAL. TEMPORARY FENCING REQUIRED BY PRIVATE PROPERTY OWNERS SHALL BE PROVIDED BY CONTRACTOR. ;-- ALL INERT CONTRACTOR IS ADVISED TO CONTACT PROPERTY OWNERS AT LEAST FORTY-EIGHT (48) HOURS IN ADVANCE- OF REMOVING ANY � � 14. RIAL-TYPE POWER E(�UIPMENT SH L ' THE CODE OF AL'3EMARLE ' -' , - -- BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUST AL FENCE IN ORDER TO COORDINATE RELOCATION AND/OR PROTECTION OF ANY ANIMALS, AND TO ESTABLESH AND 'CONFIRM WITH �- ' '`,' f \ - - ;`�"" BE LIMITED TO THE HOURS OF 7: 00 AM TO 9: 00 PM. THE OWNER THE PRE -CONSTRUCTION CONDITION OF ANY FENCE TO BE REMOVED, DISTURBED OR REPLACED. � - 15. 0 OT APPROVAL AND ANY ' I "' 11 ­` 1, ­ ' MINIMIZE TO 2. CONTRACTOR IS PERMITTED TO WORK IN THE PUBLIC RIGHT-OF-WAY FOLLOWING ISSUANCE F VDOT - ' � ' " ' FILL, OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT TEMPORARY OR PERMANENT EASEMENT (FOLLOWING VERIFICATION OF EXISTENCE OF EASEMENT) SHOWN ON: THE PLANS. HOWEVER, - � ,` MA^FETOSADJAOCENTOLAND°ANDTOMPROVEMENTSNYANDZDA°MAGE TORAONYSPUBLIC MAINTAINS LATERAL PHYSICAL DA PROPERTY OWNERS FORTY-EIGHT 48 HOURS PRIOR TO WORKING ON ANY PRIVATE PROPERTY TO `' STREET BECAUSE= OF SLIDES, SINKING, OR COLLAPSE. CONTRACTOR SHALL NOTIFY O ( ) � �. 5," 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT 0 DETERMINE A STORAGE AREA FOR MATERIALS IF NEEDED. COORDINATION OF ACCESS TO ` 'GAIN AND COORDINATE ACCESS AND T __ _..... -;--.. -- `, `"' ';;-'"'" � , TQ PERMANENT STORMWATER MANAGEMENT FACILITIES, WHERE APPLICABLE, ALL EROSION PUBLIC RIGHT-OF-WAY AND STORAGE OF MATERIALS THEREON SHALL BE COORDINATED WITH VDOT AND THE PROJECT MANAGER. � ;;� +: '' "'' - OF THE SALE QF ANY LO , ;; CONTROL ,MEASURES REQUIRED BY THIS PLAN REGARDLESS T CONTRACTOR'S FAILURE TO SO NOTIFY AND COORDINATE WITH PROPERTY OWNERS AND/OR THE PROJECT `MANAGER MAY RESULT % ': _,_....- '` ,' Q�' `' UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. IN DELAYS. '; ,� !'"! �, ;;,,,GO�� 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO D ORDERLY APIPEARANCE AT ALL "TIMES. ALL -` I = � '' "°= �' �" RUARY TO CONSIST A 3. CONTRACTOR SHALL, AT HIS EXPENSE, MAINTAIN THE WORK SITE IN A CLEAN AN ', �:::; ,,-. ----` =`',- - = '' ,. 50/50 MTXLOF/ANNUALARYEGRASSEANDNCEREAL WINTER BRYETOOREBN MARCH AND APRIL TO DEBRIS AND SURPLUS MATERIAL COLLECTED SHALL BE DISPOSED OF OFF THE WORK SITE BY CONTRACTOR, AT HIS EXPENSE. ,.,�� r. DRIVEWAYS POLES, SIGNS RIGHT-OF-WAY ' N 4. EXISTING LAWNS, TREES, SHRUBS, FENCES, UTILITIES, CULVERTS, WALLS, WALKS, _ ,;' / - `' - - HAI�;JJTO BEEAPPLIEDYATH80ULBSAUG MONUMENTS MAILBOXES AND THE LIKE SHALL BE PROTECTED FROM DAMAGE DURING THE WORE. ANY DAMAGE CAUSED TO SUCH _�, -'"` ,..._. ,>' ='" TIVES AR OBJECT TO ;' ST TO CONS 11 ,/ •' ED Br THE COUNTY EROSION CONTRO�OINSPECTORNAS / T OF GERMAN MILLET. ITEMS SHALL BE REPAIRED OR REPLACED BY CONTRACTOR AT NO ADDITIONAL COST. PROPERTY PINS DISTURBED BY CONTRACTOR g8 _.. _, ' PERMAN�NT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND THAT ARE NOT SHONIN ON THE PLANS TO BE DISTURBED SHALL BE RESTORED BY A LICENSED SURVEYOR AT CONTRACTOR'S """ `' ' "' ` EXPENSE. � '\ --' -., �, '� OCK TNCORPORATEDUINTOATHERTOP 4I6EIN5HESSOFLSOBL. AFERTI°LIZERgSHABL/BEOAPPLIED AT 5. CONTRACTOR SHALL EMPLOY EROSION CONTROL DEVICES AND METHODS AS REQUIRED TO MEET THE REQUIREMENTS AND INTENT Z' ,. --- _. ;. '" � `�' <'; �� "; - - T SEEDING SHALL 1000 LBS/ACRE AND CONSIST OF A 10 20 10 NUTRIENT MIX. PERMANEN OF THE LOCAL EROSION CONTROL ORDINANCE. CONTRACTOR SHALL PROVIDE THE NECESSARY DIIVERSION DITCHES, DIKES OR -- \ ,Q BE APPLIED AT 180 LBS/ACRE AND CONSIST of 115% KENTUCKY 31 OR TALL FESCUE AND TEMPORARY CULVERTS REQUIRED TO PREVENT MUD AND DEBRIS FROM BEING WASHED ONTO THE STREETS OR PROPERTY. �" .. ', .� � 22 � 0-5°/8� PE RYELRERS� TR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED ' 0 P EVENT MUD OR DUST FROM BEING DEPOSITED ON STREETS. NO AREA � ` ENNIAL CONTRACTORS VEHICLES SHALL BE KEPT CLEAN T R � ., I,'�.,, �. -- "" ?'�, � EROSOIONBCONTROL INSPECTOR •VES ARE SUBJEC TO BE A OVED B T PPR Y THE COUNTY SHALL BE LEFT DENUDED FOR MORE THAN SEVEN (7) CALENDAR DAYS. '�. '' � 11 i I 1',� 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. �' I � ; ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES I5 TO BE REPAIRED IMMEDIATELY. ,. _ r�T P - VEGETATION Q Rte L50 , _ ... WITH `, DIMENT.SALLESEOEDED AREASE�REHTO BE�RESEEDEDWWHENT�ECESSARYUMO ACHIEVEED Z '_-- I ,,,''`., -, `; ,. .-% -� GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING i 1. PRIOR TO REMOVING ANY VEGETATION, CONTRACTOR SHALL MEET WITH THE PROPERTY OWNERS AND THE PROJECT MANAGER TO I - , - ISSION TO REMOVE VEGETATION REQUIRED TO DO THE WORK. O -- • REVIEW THE LIMITS OF CONSTRUCTION AND OBTAIN PERM I`� " " _.. +, �- 5 1 -".__,, ;., -:.." ": ` � 20. AL°IMEMPORARYAEROSIONRANDISEDIMENT CONTROLNM°EASURESEARERTO BEMRDMOVEDYWITHIN 2. TREE AND PLANT ROOTS OR BRANCHES THAT MAY INTERFERE WITH THE WORK SHALL BE TRIMMED OR CUT ONLY WITH THE � i _ - - - --.. _... _ __ GER NEEDS , APPROVAL OF THE PROJECT MANAGER. ANY TREES OR PLANTS WHICH ARE SHOWN TO REMAIN THAT DO NOT INTERFERE WITH � 1 - SUBJECT TO APPROVAL BY THE COU '' '`. `., : `. ': _. NTY OSION CONTROL INSPEC THE WORK, BUT ARE DAMAGED BY CONTRACTOR OR HIS SUBCONTRACTORS, SHALL BE REPAIRED OR REPLACED BY CONTRACTOR = � �` `""' ' ER TOR AT NO ADDITIONAL COST. 3. CONTRACTOR SHALL CLEAN UP, RESTORE, SEED AND MAINTAIN ALL DISTURBED AREAS IMMEDIATELY UPON COMPLETION OF WORK �' � � ''' . ON EACH SITE. TOPSOIL, -SEED, FERTILIZER AND MULCH SHALL BE PLACED IN ACCORDANCE WITH ESC AUTHORITY STANDARDS ON VICINITY MAP ALL DISTURBED AREAS. A PERMANENT STAND OF GRASS ADEQUATE TO PREVENT EROSION SHALL BE ESTABLISHED PRIOR TO FINAL ACCEPTANCE. 4. THE ACT OF RESEEDING SHALL NOT QUALIFY AS "STABILIZED". THE CONTRACTOR SHALL BE RESPONSIBLE TO ESTABLISH SCALE: * �� 1 � FEET GENERAL CONSTRUCTION NOTES FOUR PPPR®v�� ounky VEGETATION, NOT SIMPLY APPLY SEED AND MATERIALS. ti7V/'u.G I' 1- STORMWATEIR MANAGEMENT PLANS by rhe �Ibe�"'��menrOePacrmel� EROSION AND SEDIMENT CONTROL LEGEND m�n'ry �eve�o� 1 . ALL DAMS AND CONSTRUCTED FTLL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY 1�Sr�.�._-----'',14 ", ,� �-- it 0 w J 0 1� ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL SAF 3.01 n n SAFETY FENCE AN6EO�E5HNOICALMENGINEER�RA GEOTECHNICAL ENGINEEREISATOTBEBPRESENOVED BY ,�t,001, e�� PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS DURING COPJSTRUCTION OF DiAMS. OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER EROSION AND SEDIMENT CONTROL REGULATIONS. PAVED CONSTRUCTION p MANAGEMENT FACILITIES. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION PCE 3.02 '': • •, . `••�• • ENTRANCE W/ WASH RACK WR 3. FOR TEMPORARY SEDIP4ENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK IF APPLICABLE PERMANENT STQRMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE �Tg of PRIOR TO THE FINAL INSPECTION. PLACE UNTl"L THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED ES -3: ALL EROSION AND SEDIMENT .CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN SSF 3.05 SUPER SILT FENCE FROM THE couNTY ERASION coNTROL INSPECTOR. ��' � J?,�� CLEARING. 11 0 pp- 11110- x� � ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT � �� °-'� ALL TIMES. � Vim^ ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS I P 3.07 I P INLET PROTECTION (INCLUDING, BUT NOT LIMITED T0, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A m .' L. ,agc�.art SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN 116 Lic. No. ,�, ,�, 22841 �fiv REVIEWING AUTHORITY. Dv 3.12 INLET PROTECTION ��' 1� ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES 4SSIONAL ��G NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -7; ALL DISTURBED ARES ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURE'S AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION. HAS BEEN ACHIEVED. OP 3.18 QP OUTLET PROTECTION ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9; THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. TS 3.31 TS TEMPORARY SEEDING APPROVALS T P S 3.32 PS PERMANENT SEEDING DEPARTMENT COMMUNITY OF PLANNING / ZONING L����_ DEVELOPMENT g�M 3.36 rM SOIL STABILIZATION/BLANKET MATTING ENGINEERING D� 3.39 D � j w •. Lu 0 cv � Q. o�, Q� z rcW >0 FILE NUMBER 8053 SHEET 20F11 1ilartli`p COUNTY COMMENTS MARCH 5, 2018 DATE October 5, 2017 SCALE 40' CONTOUR INTERVAL 2 FT FILE NUMBER 8053 SHEET 30F11 REVISIONS COUNTY COMMENTS MARCH 5, 2018 =• 4.15AC < QKM40.. .. ... .. I\© . . . . . . . . . . . EX OEG} STREAM ......... -- --------- ........... ........... . ......... ...... STABILIZATION & ........... ......... RIPARIAN BUFFER__.. .... .... .. ..... RESTORATION ESM'T . ..... .. ....... ..... DATE \October 5, 2017 SCALE ill = 40° CONTOUR INTERVAL 2 FT FILE NUMBER 8053 SHEET 40F11 REVISIONS COUNTY COMMENTS MARCH 5, 2018 DATE October 5, 2017/ SCALE 1"=40' CONTOUR INTERVAL 2 FT FILE NUMBER 5053 SHEET 50F11 F" 14 EROSION CONTROL NARRATIVE PRIOR TO CONSTRUCTION 1. OWNER SHALL POST SURETY BONDS FOR CONSTRUCTION, AND EROSION & SEDIMENT CONTROL/SWM. 2. CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE RIGHT-OF-WAY (VDOT LAND -USE PERMIT). BONDING FOR WORK WITHIN THE VDOT RIGHT-OF-WAY MAY BE REQUIRED TO OBTAIN THE PERMIT. 3. CONTRACTOR SHALL COORDINATE WITH OWNER TO MEET VSMP REQUIREMENTS, INCLUDING PERMITS AS REQUIRED BY THE STATE DEPARTMENT OF ENVIRONMENTAL QUALITY (DEQ) OR LOCAL VSMP AUTHORITY (ALBEMARLE CO.). 4. CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION. 5. A PRE -CONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND SCHEDULING OF PRE -CONSTRUCTION MEETING. PROJECT DESCRIPTION THE PURPOSE OF THIS PROJECT IS TO CONSTRUCT BLOCK 22 AS PART OF THE ONGOING DEVELOPMENT WITHIN OLD TRAIL VILLAGE. THE BMP FACILITY WILL SERVE AS PART OF THE ORIGINAL APPROVED STORMWATER MASTER PLAN (WP0201600009) FUNCTIONING AS A BIORETENTION FACILITY. THE LIMITS OF DISTURBANCE INCLUDES APPROXIMATELY 5.87 ACRES OF LAND DISTURBING ACTIVITIES. EXISTING SITE CONDITIONS THE PROJECT AREA IS CURRENTLY BEING USED AS AN EROSION AND SEDIMENT CONTROL PLAN (WP0201600049) FOR THE TEMPORARY STOCKPILING OF TOPSOIL AND FILL MATERIALS BEING USED FOR OTHER DEVELOPMENT WITHIN OLD TRAIL. THE PROPOSED MEASURES TO CAPTURE THE SITE'S RUNOFF DURING THE CONSTRUCTION OF THE PATH WILL BE SUPER SILT FENCE. INSTALLATION AND MAINTENANCE OF THE PERIMETER CONTROLS THROUGHOUT CONSTRUCTION IS CRITICAL TO PREVENTING SEDIMENT LATENT RUNOFF FROM EXITING THE SITE. ADJACENT AREAS OLD TRAIL DRIVE FORMS THE WESTERN BORDER, LICKINGHOLE CREEK LIES TO THE NORTHEAST, WHILE GOLF DRIVE FRONTS THE NORTH OF THE PROJECT SITE. OFF-SITE AREAS NO CONSTRUCTION OUTSIDE THE LIMITS OF DISTURBANCE SHOWN IS REQUIRED. ANY SURPLUS OR SHORTAGE OF EARTHWORK SHALL BE BROUGHT TO OR OBTAINED FROM A SITE WITH APPROVED AND ADEQUATE EROSION CONTROL PROTECTION. CRITICAL AREAS CRITICAL AREAS EXIST WITHIN THE PROPOSED BLOCK DEVELOPMENT AND ARE IDENTIFIED ON THE PLANS. THESE AREAS SHALL BE EXAMINED AND IDENTIFIED BY THE CONTRACTOR WITH EXTREME CAUTION. SOILS 25B - DYKE SILT LOAM (2% TO 7%) SOIL IS DEEP, GENTLY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY AND WATER CAPACITY ARE MODERATE. SURFACE RUNOFF IS MEDIUM AND EROSION HAZARD IS MODERATE. 36C - HAYESVILLE CLAY LOAM (7% TO 15%, SEVERELY ERODED) SOIL IS DEEP, MODERATELY STEEP AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY AND WATER CAPACITY ARE MODERATE. SURFACE RUNOFF IS RAPID AND EROSION HAZARD IS SEVERE. STRUCTURAL PRACTICES 1. TEMPORARY CONSTRUCTION ENTRANCE (3.10) - A TEMPORARY CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT SITE ENTRANCE OFF OF OLD TRAIL DRIVE. 2. SILT FENCE BARRIER (3.10) - SILT FENCE BARRIERS WILL BE INSTALLED TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE EROSION AND SEDIMENT CONTROL PLAN. 3. SUPER SILT FENCE BARRIER - WIRE -REINFORCED SILT FENCE BARRIER WILL BE INSTALLED TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE EROSION AND SEDIMENT CONTROL PLAN. VEGETATIVE PRACTICES 1. SURFACE ROUGHENING (3.29) - ALL AREAS WITH A GRADE STEEPER THAN 3:1 SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE 3.29-4) TO AID IN GRASS ESTABLISHMENT, INCREASE INFILTRATION, AND TO SLOW RUNOFF VELOCITIES. 2. TOPSOILING & STOCKPILING (3.30) - TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED ALONG THE LOWER PERIMETER TO PROTECT DOWNSTREAM AREAS. 3. TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 14 DAYS SHALL BE STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 4. PERMANENT SEEDING (3.32) - AREAS BROUGHT TO FINAL GRADE OR THOSE CONSTRUCTION AREAS THAT WILL REMAIN DORMANT FOR YEAR OR MORE SHALL BE STABILIZED WITH A PERMANENT SEED MIXTURE ACCEPTABLE TO THAT TIME OF YEAR. PREPARE SURFACE WITH APPROVED TREATMENT AND ADDITIVES PRIOR TO APPLYING SEED. 5. MULCH (3.35) - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL BE APPLIED TO DISTURBED SURFACES TO PREVENT EROSION AND REDUCE OVERLAND FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING OPERATIONS, OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH CANNOT BE SEEDED DUE TO THE SEASON BUT WHICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 6. DUST CONTROL (3.39) - DUST CONTROL METHODS MUST BE USED TO REDUCE THE AMOUNT OF AIRBORNE DUST DURING ALL PHASES OF CONSTRUCTION WHERE SOIL IS EXPOSED OR DISTURBED. MANAGEMENT STRATEGIES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BE SEQUENCED, AND ALSO BEGIN AND END AS QUICKLY AS POSSIBLE. 2. THE CONSTRUCTION ENTRANCE AND PERIMETER EROSION CONTROL MEASURES SUCH AS SILT FENCE SHALL BE INSTALLED AS THE FIRST STEP OF DISTURBANCE. 3. TEMPORARY SEEDING OR OTHER STABILIZATION METHODS, SUCH AS BASE AGGREGATE WILL FOLLOW IMMEDIATELY AFTER REACHING FINAL GRADES. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE-SEEDEID AS NEEDED TO ESTABLISH GROWTH. IF GROWTH IS NOT PRESENT AFTER A PERIOD OF SUCCESSIVE ATTEMPTS, ALTERNATIVE MEASURES SHOULD BE TAKEN TO STABILIZE THE AREA SUCH AS BLANKET MATTING OR SOD. 4. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 5. AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL ADMINISTRATOR, THE TEMPOIRARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP OR REMOVED, AND THE SEDIMENT TRAPS CAN BE FILLED IN AND SEEDED, THEREBY REDIRECTING DRAINAGE TO THE PERMANENT FACILITIES. PERMANENT STABILIZATION ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH STRAW & SEED IMMEDIATELY FOLLOWING FINISHED GRADE. SEEDING SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER AND LIME APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. EROSION CONTROL MAINTENANCE 1. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 2. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL BUILDUP. IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS TO PREVENT TRANSPORTATION OF SOIL ONTO THE ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A WASH -RACK MAY BE REQUIRED. 3. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED. 4. STORMWATER CONVEYANCE CHANNELS: 4.1.RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 4.2.SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL. 5. THE EARTHEN EMBANKMENTS SHALL BE CHECKED REGULARLY TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT. 6. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED. SEQUENCE OF CONSTRUCTION Maintenance Fertilization for Permanent Seedlings Use Soil Test Recommendation or Rates Shown Below Seeding Mixture PERMANENT SEEDING MIXTURES 1. AFTER OBTAINING ALL REQUIRED PERMITS, THE CONTRACTOR SHALL COORDINATE APRE-CONSTRUCTION Lbs. per Time 2. MEETING, ALLOWING 72 HOURS FOR ITS COORDINATION. PS FOR THE PIEDMONT AREA Species 3. CONTRACTOR SHALL INSTALL ALL PERIMETER CONTROLS (SUPER SILT FENCE, THE RECEIVING SEDIMENT 1000 sf BASIN, AND THE CONSTRUCTION ENTRANCE) AS FIRST STEP IN CONSTRUCTION. TABLE 25 TOTAL LBS. PER ACRE 4. CONTRACTOR SHALL COORDINATE INSPECTIONS ACCORDINGLY, AS REQUIRED BY THE COUNTY OF 500 11.5 ALBEMARLE. *Not closer than 3" up 70% or more 5. AFTER RECEIVING AUTHORITY APPROVAL, BEGIN CLEARING, GRUBBING AND FINE GRADING OPERATIONS AS MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL 175-200 LBS. NECESSARY TO ACHIEVE FINAL GRADES FOR THE STORMWATER MANAGEMENT MEASURES. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE %95-100% 6. CONSTRUCT THE TEMPORARY SEDIMENT BASIN ALONG WITH DIVERSION DIKES TO ENSURE PROPER DESIGN - IMPROVED PERENNIAL RYE GRASS 0-5% DRAINAGE. INSTALL RISER STRUCTURE, BARREL PIPE, TRASH -RACK, ANTI VORTEX DEVICE, AND DEWATERING - KENTUCKY BLUEGRASS 0-5% ORIFICE AS PART OF THE TEMPORARY SEDIMENT BASIN. THE STRUCTURES SHALL REMAIN IN PLACE WITH 4/30 8/14 SUBTLE CHANGES AS PART OF BMP CONVERSION TO STORMWATER MANAGEMENT. ALL MEASURES SHALL BE Do not mow Crownvetch CONSTRUCTED IN ACCORDANCE WITH APPROVED PLANS. 5/31 7/31 7. PERMANENT SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER Choose one: Service lespedeza FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE HIGH MAINTENANCE LAWN 200-250 LBS. APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN - KENTUCKY 31 OR TURF -TYPE TALL FESCUE 100% DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE GENERAL SLOPE (3:1 OR LESS) TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. BY Barley 8. CONSTRUCTION OF THE BIORETENTION AREA MAY ONLY BEGIN AFTER THE ENTIRE CONTRIBUTING DRAINAGE - KENTUCKY 31 FESCUE 128 LBS. AREA HAS BEEN STABILIZED WITH VEGETATION. IT MAY BE NECESSARY TO BLOCK CERTAIN CURB OR Not required. not Fairly uniform OTHER INLETS WHILE THE BIORETENTION AREA IS BEING CONSTRUCTED. THE PROPOSED SITE SHOULD BE - RED TOP GRASS 2 LBS. CHECKED FOR EXISTING UTILITIES PRIOR TO ANY EXCAVATION. - SEASONAL NURSE CROP* 20 LBS. 9. BOUNDARIES OF THE CONTRIBUTING DRAINAGE AREA SHOULD BE CHECKED AND THE ACTUAL INLET 500 TOTAL 150 LBS. ELEVATIONS BE EXAMINED TO ENSURE THEY CONFORM TO ORIGINAL DESIGN. STEEPER THAN 3:1MAINTENANCE SLOPE LOW- ( ) fescue &; service 10. PRIOR TO THE CONSTRUCTION OF THE BIORETENTION AREA, A BERM SHALL BE CONSTRUCTED SLIGHTLY X - UPGRADIENT OF THE AREA SO THAT ANY STORMWATER RUNOFF IS DIVERTED AWAY FROM THE desired, and then in lespedeza, or P BIORETENTION AREA INTO THE EXISTING SEDIMENT BASIN UNTIL IT IS COMPLETED. SPECIAL PROTECTION - KENTUCKY 31 FESCUE 108 LBS. MEASURES SUCH AS EROSION CONTROL FABRICS MAY BE NEEDED TO PROTECT VULNERABLE SIDE SLOPES fall after seed has birdsfoot trefoil. FROM EROSION DURING THE CONSTRUCTION PROCESS. - RED TOP GRASS 2 LBS. 11. ANY PRE-TREATMENT CELLS SHOULD BE EXCAVATED FIRST AND THEN SEALED TO TRAP SEDIMENTS. matured. I X 12. EXCAVATORS OR BACKHOES SHOULD WORK FROM THE SIDES TO EXCAVATE THE BIORETENTION AREA TO X Barley or ITS APPROPRIATE DESIGN DEPTH AND DIMENSIONS. EXCAVATING EQUIPMENT SHOULD HAVE SCOOPS WITH _ SEASONAL NURSE CROP* 20 LBS. ADEQUATE REACH SO THEY DO NOT HAVE TO SIT INSIDE THE FOOTPRINT OF THE BIORETENTION AREA. CONTRACTORS SHOULD USE A CELL CONSTRUCTION APPROACH IN LARGER BIORETENTION BASINS, - CROWN VETCH** 20 LBS. WHEREBY THE BASIN IS SPLIT INTO 500 TO 1,000 SQ. FT. TEMPORARY CELLS WITH A 10-15 FOOT EART 500 TOTAL 150 LBS. BRIDGE IN BETWEEN, SO THAT CELLS CAN BE.EXCAVATED FROM THE SIDE. *USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: 13. IT MAY BE NECESSARY TO RIP THE BOTTOM SOILS TO A DEPTH OF 6 TO 12 INCHES TO PROMOTE X X GREATER INFILTRATION. desiroccaed, desired, and fall and plant distribution 14. PLACE GEOTEXTILE FABRIC ON THE SIDES OF THE BIORETENTION AREA WITH A 6 -INCH OVERLAP ON THE FEBRUARY 16TH THROUGH APRIL 30TH. . . . . . . . . . . . ANNUAL RYE SIDES. IF A STONE STORAGE LAYER WILL BE USED, PLACE THE APPROPRIATE DEPTH OF #57 STONE ON MAY 1ST THROUGH AUGUST 15TH . . . . . FOXTAIL MILLET THE BOTTOM, INSTALL THE PERFORATED UNDERDRAIN PIPE, PACK #57 STONE TO 3 INCHES ABOVE THE AUGUST 16TH THROUGH OCTOBER 31ST. . . . . . . . . . . .ANNUAL RYE UNDERDRAIN PIPE, AND ADD APPROXIMATELY 3 INCHES OF CHOKER STONE/PEA GRAVEL AS A FILTER NOVEMBER 1ST THROUGH FEBRUARY 15TH . . . . . . . . . . ANNUAL RYE BETWEEN THE UNDERDRAIN AND THE SOIL MEDIA LAYER. IF NO STONE STORAGE LAYER IS USED, START x X WITH 6 INCHES OF #57 STONE ON THE BOTTOM, AND PROCEED WITH THE LAYERING AS DESCRIBED ** SUBSTITUTE SERICEA LESPEDEZA FOR CROWNVETCH EAST OF FARMVILLE, VA (MAY ABOVE. THROUGH SEPTEMBER USE HULLED SERICEA, ALL OTHER PERIODS, USE UNHULLED 15. INSTALL RISER STRUCTURE, BARREL PIPE, TRASH -RACK, ANTI VORTEX DEVICE, UNDER -DRAINS, AND SERICEA. ) 2" for red fescue CLEANOUTS/OBERSERVATION WELLS AS PART OF THE CONVERSION FROM EROSION CONTROL TO STORMWATER MANAGEMENT. ALL MEASURES SHALL BE CONSTRUCTED IN ACCORDANCE WITH THE APPROVED IF FLATPEA IS USED IN LIEU OF CROWNVETCH, INCREASE RATE TO 30 LBS./ACRE. ALL PLANS. LEGUME SEED MUST BE PROPERLY INNOCULATED. WEEPING LOVEGRASS MAY BE ADDED 16. OBTAIN SOIL THE MEDIA FROM A QUALIFIED VENDOR, AND STORE IT ON AN ADJACENT IMPERVIOUS AREA TO ANY SLOPE OR LOW MAINTENANCE MIX DURING WARMER SEEDING PERIODS; ADD 10 - OR PLASTIC SHEETING. AFTER VERIFYING THAT THE MEDIA MEETS THE SPECIFICATIONS, APPLY THE MEDIA 20 LBS./ACRE IN MIXES. 20-10-10 IN 12 -INCH LIFTS UNTIL THE DESIRED TOP ELEVATION OF THE BIORETENTION AREA IS ACHIEVED. WAIT A 2.3 May 20 -June -30, FEW DAYS TO CHECK FOR SETTLEMENT, AND ADD ADDITIONAL MEDIA, AS NEEDED, TO ACHIEVE THE DESIGN X - ELEVATION. 50 lbs. if needed. 17. AFTER SITE IS STABILIZED AND PERMISSION IS OBTAINED FROM THE EROSION CONTROL AUTHORITY, x - REMOVE SILT FENCING AND OTHER ESC MEASURES SUCH AS THE TEMPORARY BERM, DIVERSION DIKES, X - ETC. DRILL THE (3) 4" ORIFICES INTO THE EXTENDED DETENTION STRUCTURE AND REMOVE AND PATCH THE DEWATERING ORIFICE AS FINAL STAGE OF BMP CONVERSION. PERMANENT - 8/15 Millet 50 It 1.15 1/2 SEEDING X - - X cE CONSTRUCTION ENTRANCE _ ,;,, - ",V -2A I r 1 i e^ i �S'z z _ w-- / � ., �--_ t -.•--F.. � 3' F'>° Ei E_j rlT 1...... ��i - y ,��,t���rr� mss_ _, ..2-s�•,, r,� � ��� <ts-'� ;, �-- � _ � _. pp PROFILE . EI,J 3.`ti 1 II L i a; p W rDH Yt �'l`. 2% i L I L '41 11.1 L EiS PLAN SECTION A --A =� ii►uiiiii2lfii �� at�f f�rl;sf l iaeli iiittt 1rr< i<�, tall+!<_l ���t1i �r >iiiui�aallzi� 1 iai�li lt;illla t1cl cril,.:urt 1 �e t1ie, wa .11 Nvatef 11111,,4 [re i at•lxed, a ay h'0111 (lie i 1116alil:e tt) a al.Pri ev t�+t area f- 1�111�� � ,�cc[1111�xit �Il .,e�Iulres�t ..l14i11 be e11te1`u1'> ;•taarill cl1a1i11;;, �lit�lle;. a.�i° �+��atef�+:Wtu,,e,,. PAVED WASH RACK NC) ALE FLOW FLOW A I 6QD A B A SILT FENCE O O SF/STONE NOT REQUIRED AFTER SLOPES ARE STABILIZED DOWNSLOPE OF OUTFALL POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) E: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control,VA. DSWC PLATE. 3.10-2 1od and Wyant U FERTILIZATION &MAINTENANCE TABLE 24 Maintenance Fertilization for Permanent Seedlings Use Soil Test Recommendation or Rates Shown Below Seeding Mixture Formulation Lbs. per Lbs. per Time Mowing Seedin zones 37 and Seedin Date 38 9 Species Acre 1000 sf 7a and 7b Tail fescue makes 10-10-10 500 11.5 Yearly, or as needed *Not closer than 3" up 70% or more or 5/1- 8/15- 3/1- if occasional mowing of cover. 30-10-10 400 9.2 fall is desired. 4/30 8/14 Spring the year Do not mow Crownvetch 11/15 5/31 7/31 following establish - Choose one: Service lespedeza 0-20-0 400 9.2 ment and every 4-5 crownvetch Birdsfoot trefoil 0 BY years thereafter. BY Barley 2.5 1 2.80 1-2 X Not required. not Fairly uniform X - 10/15 Fall the year closer than 4" if stand of tall Oats 500 11.5 es followingestablish- occasional mowing is fescue &; service - X - ment and every 4-5 desired, and then in lespedeza, or P - Rye -19Z 2.5 1 years thereafter. fall after seed has birdsfoot trefoil. - X X - matured. I X - X Barley or Not required. not weeping lovegrass P 9 9 Spring the year closer than 4" if & serice lespedeza 5-10-10 500 11.5 followingestablish- mowing is Y uniiform 1 X X ment and every 3-4 desiroccaed, desired, and fall and plant distribution 10/15 X X years thereafter. after sericea has X x matured. x X x X September, Mow no closer than Red & clhewings 20-10-10 250 5.8 30 days later 2" for red fescue fescue, Kentucky and Ky bluegrass; bluegrass: hard Weeping lovegross4l 4 lbs. 0.09 December, and closer than 3" fescue mixture: 20-10-10 100 2.3 May 20 -June -30, for fescue. X - Annual ryegr03S 50 lbs. if needed. 1/4-1/2 ssF SUPER SILT FENCE CONSTRUCTION OF A SILT FENCE (WITH WIRE S UPPOR T) 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6' MAX. FLOW / 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) -. - _ - 91k,71161 INFORMATION FROM TABLE 3.32-C OF THE VA ESC HANDBOOK IS PROVIDED BELOW FOR SEEDING SELECTION TOTAL LBS. PER ACRE MINIMUM CARE LAWN 200-250 LBS -COMMERCIAL OR RESIDENTIAL 90-100% KENTUCKY 31 OR TURF -TYPE TALL FESCUE 0-10% IMPROVED PERENNIAL RYEGRASS 0-10% KENTUICKY BLUEGRASS GENERAL SLOPE (3:1 OR LESS) 128 LBS KENTUCKY 31 FESCUE 2 LBS RED TOP GRASS 20 LBS SAEASONAL NURSE CROP ** ** USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: MARCH, APRIL THROUGH MAY 15TH ANNUAL RYE MAY 16TH THROUGH AUGUST 15TH FOXTAIL MILLET AUGUST 16TH THROUGH SEPTEMBER, OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY WINTER RYE FERTILIZER (10-20-10 OR EQ) SHALL BE APPLIED AT THE RATE of 1100 LBS/ ACRE. AGRICULTURAL LIME SHALL BE APPLIED TO SEEDBEDS AT TTHE RATE of 110 LBS/ 1000 SQ. FT. SUGGESTED TEMPORARY SEEDING MIXTURE FERTILIZER: 10-20-10 1,000 LBS/ACRE SEPTEMBER -FEBRUARY 15: 50% ANNUAL RYE & 50% WINTER RYE 100 LBS/ACRE FEBRUARY 16 -APRIL 30: ANNUAL RYE 100 LBS/ACRE MAY -AUGUST: GERMAN MILLET 50 LBS/ACRE OTHER OPTIONS EXIST, SEE VA EROSION AND SEDIMENT CONTROL HANDBOOK. SUGGESTED PERMANENT SEEDING MIXTURE LIME: 2 TONS/ACRE FERTILIZER: 10-20-10 1,000 LBS/ACRE MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE MAY 16 -AUGUST 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, FOXTAIL MILLET 20 LBS/ACRE AUGUST 16 -OCTOBER: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE NOVEMBER -FEBRUARY: KENTUCKY 31 FESCUE 200 LBS/ACRE, WINTER RYE 20 LBS/ACRE SAFETY 1 IT I TABLE 26 TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES Seeding Rate Planting depth 16/9 Seedin zones 37 and Seedin Date 38 9 Species Per Lbs/1000 7a and 7b 6b 6a and 5b •!ti+rt�1 acre Sq. ft (Inches) 2/1- 5/1- 8/15- 3/1- 5/1- 8/15- 3/15- 6/1- 8/1- 4/30 8/14 11/30 4/30 8/14 11/15 5/31 7/31 10/31 Choose one: BY 0 BY ()t BY Barley 2.5 1 2.80 1-2 X - 10/15 X - 10/15 X - 10/1 Oats 3 bu. 2.21 1-2 X - - X - - X - - Rye -19Z 2.5 1 3.22 1-2 X - X X - X X - X Barley or Rye Plus 150 lbs. 3.45 1 X X 10/15 X X 10/15 X X 10/1 Faxtail X x x x X x X x x millet40 Weeping lovegross4l 4 lbs. 0.09 1/4-1/2 - X - - X - - X - Annual ryegr03S 50 lbs. 1.15 1/4-1/2 x - 11/1 X - 1'1/1 X - 8/15 Millet 50 It 1.15 1/2 - X - - X 36 Applicable on slopes of 3:1 or flatter 337 Refer to figure A - Adopted from USDA, ARS Miscellaneous Publication #1475, January 1990 38Z Between fall and spring seeding dates, use mulch only if ground is frozen and reseed when thawed 39 May be used as a nurse crop for late fall/early winter permanent seedings, add 56 lbs/ac. to the permanent seeding mixture 40 Maryland State Highway Administration Temporary Seed Mix May be used as a nurse crop for mid -summer permanent seedings. Add 2 lbs/ac AIZ to permanent seed mix. May be used as a nurse crop for mid -summer permanent seedings. Add 10 lbs/ac. 42to the permanent seeding mix. INFORMATION FROM TABLE 3.32-C OF THE VA ESC HANDBOOK IS PROVIDED BELOW FOR SEEDING SELECTION TOTAL LBS. PER ACRE MINIMUM CARE LAWN 200-250 LBS -COMMERCIAL OR RESIDENTIAL 90-100% KENTUCKY 31 OR TURF -TYPE TALL FESCUE 0-10% IMPROVED PERENNIAL RYEGRASS 0-10% KENTUICKY BLUEGRASS GENERAL SLOPE (3:1 OR LESS) 128 LBS KENTUCKY 31 FESCUE 2 LBS RED TOP GRASS 20 LBS SAEASONAL NURSE CROP ** ** USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: MARCH, APRIL THROUGH MAY 15TH ANNUAL RYE MAY 16TH THROUGH AUGUST 15TH FOXTAIL MILLET AUGUST 16TH THROUGH SEPTEMBER, OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY WINTER RYE FERTILIZER (10-20-10 OR EQ) SHALL BE APPLIED AT THE RATE of 1100 LBS/ ACRE. AGRICULTURAL LIME SHALL BE APPLIED TO SEEDBEDS AT TTHE RATE of 110 LBS/ 1000 SQ. FT. SUGGESTED TEMPORARY SEEDING MIXTURE FERTILIZER: 10-20-10 1,000 LBS/ACRE SEPTEMBER -FEBRUARY 15: 50% ANNUAL RYE & 50% WINTER RYE 100 LBS/ACRE FEBRUARY 16 -APRIL 30: ANNUAL RYE 100 LBS/ACRE MAY -AUGUST: GERMAN MILLET 50 LBS/ACRE OTHER OPTIONS EXIST, SEE VA EROSION AND SEDIMENT CONTROL HANDBOOK. SUGGESTED PERMANENT SEEDING MIXTURE LIME: 2 TONS/ACRE FERTILIZER: 10-20-10 1,000 LBS/ACRE MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE MAY 16 -AUGUST 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, FOXTAIL MILLET 20 LBS/ACRE AUGUST 16 -OCTOBER: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE NOVEMBER -FEBRUARY: KENTUCKY 31 FESCUE 200 LBS/ACRE, WINTER RYE 20 LBS/ACRE SAFETY 1 IT I SOURCE: CONWED PLASTICS VDOT ROAD AND BRIDGE STANDARDS VA. DSWC PERSPECTIVE VIEW METAL FENCE PLATE. 3.1-1 � AST H O F Jimmy L. Taggart Lic. No. 1'„f, 22841 44v 1 ; o��`�sI `I A REVISIONS COUNTY COMMENTS MARCH 5, 2018 DATE October 5, 2017 SCALE N/A CONTOUR INTERVAL N/A f US •r* •+r!r ••'s+ir •�;r+A�•«• • e,••* !• 41 •!ti+rt�1 , , ►�+•r,r•,rs•!�r,•��,r•*!,�i+• or r CD SOURCE: CONWED PLASTICS VDOT ROAD AND BRIDGE STANDARDS VA. DSWC PERSPECTIVE VIEW METAL FENCE PLATE. 3.1-1 � AST H O F Jimmy L. Taggart Lic. No. 1'„f, 22841 44v 1 ; o��`�sI `I A REVISIONS COUNTY COMMENTS MARCH 5, 2018 DATE October 5, 2017 SCALE N/A CONTOUR INTERVAL N/A FILE NUMBER 8053 SHEET 16 of 11 f r CD •6 f 0 ()t r ,r 0 0 i FILE NUMBER 8053 SHEET 16 of 11 Q LV t3 N CV i Q ® Q) Z } n V W>' U. W Z �� 5- 'V ow W Q UQ OW 04 o� 0Lo 9LU LU0 LL o� W0 rz � c 0 Q. z9 �00 0 Q� � W OUTLET PROTECTION 0do DIMENSIONS REVISIONS COUNTY COMMENTS MARCH 8, 2018 MM& _T_ DATE October 5, 2017 SCALE AS SHOWN CONTOUR INTERVAL N/A L y� LJ CD ' �.. �► z IY O �� w> z O �- 0 O 4 O LIJ yL�J �i.L 1.x.7 FILE NUMBER SHEET' of 11 SEDIMENT BASIN SCHEMATIC ANTI -,SEEP COLLAR ELE VA. TIONS TEMPORARY � BASIN CREST SPILLWAY EMERGENCY 680 680 DESIGN HIGH WATER (25 -YR. STORM ELEV.) :.:.::..::.::..�... SATURATED ZONE 0.5' ti .................... MIN. 1.0' ::.::.:.. ...... CONNECTIONS BETWEEN rr::�::.'..........................F,'i;;.,: .... .... ..... .. ..... THE ANTI -SEEP AND ... ........ RISER CREST:::.�:.�:::.:.�.�:.:::.:... 675 � 67 C.Y. AC. ........ ... DEWATERING THE BARREL MUST BE 675 �� .... WATERTIGHT � EXISTING GRADE STORAGE DEVICE DRY .................. ........... ............ 67 C.Y. AC. WET STORAGE k6_11-::::::;::;��1 I 1=III=111-� - .........:•::.::::::... � -._: - III-III-III-III=ill I -III I! I -III -III - =1I I_ I I -III -I I1=1 I11= I1=1I1=1II-1I1=1I I-1I1=_1I1=1I I I II -1 670 =1 SEDIMENT CLEANOUT POINT I � 1=1 11=1 � i 1=1 I I 11=1 11=1 11=1 11=1 I I -I 11=1 I I- I -1 � I 670 ;III�I1=1 _ _ _III IIS III-1II-1II-111=�=111=111 ,111-111-111-111=„IJ.,,IIIII�ITII�III�IIiII�I_ 48" RCP RISER -1 ! 1=1 11=1 11=1 11=1 11=1 I i= ILI -- 'I-111-11i�11i-1111111111i11�1� TOP=665.00 _ �! III=III=III- - 3:1 PROPOSED GRADE TOP OF DAM -666.50 DESIGN ELEVATIONS WITH �•"�c-�wATER1NG - EMERGENCY SOURCE: VA. DSWC PLATE. 3.14-4 ORIFICE=x:60 3:1 EMERGENCY SPILLWAY ss5 SPILLWAY 665 6s5 SOURCE: VA. DSWC PLATE. 3.14-2 - 2:1 (TO BE LANDSCAPED) P INLET PROTECTION OP OUTLET PROTECTION BOTTOM..... of SEDIMENT BASIN 66.1 ,50 _ �- 660 PIPE CUTLET CONDITIONS 660 BL D CK d'c GRAVEL CURB INLET - 45' OR 2�-" HDPE (BARREL ....INV IN=661':' 0 SEDIMENT F'IL TER A INV ouT=ssO�i5 SLOPE=1:67 _ CURB INLET 655 655 SEE DESIGN DETAILS FOR .........._ .... . PIPE OUTLET TO FLAT • __�-- �-- AREA WITH NO DEFINED 650 s50 CHANNEL •;•;:. _ PLAN VIEW 0+00 +20 +40 +60 +80 1 +00 +20 +40 +60 +80 2+00 +20 +40 +60 d• wQWQ d -NN 000 a00c0 NON I'�Or7 v--..\ ------ � a � ao r� ri � rte. r+y �r <t vi � ori �-�'-- L ao h co � cp cs� :fl u> ca cn � cfl U, C`) t0 to � Ct0 iG � CD xA � CD (� J-__ tD CO J WIRE SCREEN CONCRETE BLOCK d n- ---�-�'� GRAVEL FILTER EVENTS FOR TEMPORARY SEDIMENT BASIN -'--�---' SECTION A -A FILTER CLOTH KEY IN 6"-9"; RECOMMENDED FOR ENTIRE PERIMETER TEMPORARY SEDIMENT BASIN PARAMETERS EVENT INFLOW (CCAS) ROUTED (.-CFS) ELEVATION (FTI STORAGE (CUBIC YDS *PARAMTERS TO RIEMAIN FOR BMP CONVERSION TO EXTENDED DETENTION -SEE SWM DETAILS � � Total Design Drainage Area= 4.71 acres 2 -YR 14.79 5.28 665.14 475 RUNOFF OVERFLOW WATER WITH FILTERED WATER 3d (MIN. 10 -YR 26.21 21.96 665.60 584 SEDIMENT � a ) Basin Design Volumes: ... , Wet Storage - 25 -YR °' � •� � •� � ••. �� 1 I I I I� I I I' �I I I� I I I � 11 � 25 -YR 34.13 28.20 665.74 617 do 16 y I_I III III: -III III1.' Minimum Volume Req d s7 cy * 4 71 acres - 3 c IIIC_;� I � III' II ISI il� I.I 'n ° A 6.,..: '• ` ' III III III III II � Available Basin Volume Prov'd. = 347 cy C�? 664.60 ill III:: III II - � '. >=` ' •:'•. • � � ��•• it=III III= III ::_Lli PIPE OUTLET TO WELL Depth t0 Cleanout Elev. = 1.00 ft TOP OF EMBANKMENT=666.50 III I I ;: III III I i I III = I I III I_I I III � • • '. i I': III I I_I; DEFINED CHANNEL SCALE 1 " = 5 ' VERTICAL ,II I -�I I'_ III III:: III II. • :o '. III III Dry Storage- 0 W.S.E. 25-YR=665.74 5 SEDIMENT PLAN VIEW Minimum Volume Req d. = 67 cy * 4.71 acres = 288 cy W.S.E. 10-YR=665.60 �Tg ®�, W.S.E. 2-YR=665.14 � _ WIRE SCREEN Available Basin Volume Prov d. = 320 cy C�? 665.95 2" x 4" wooD sruD CURB INLET L a 4" Dewatering Orifice Invert = 664.60 z.5 ° Cleanout Elev. = 663.60;,,�� SPECIAL APPLICATION � Basin Design Elevations: \ o - d Top of Dam = 666.50 \ ASSUMED PHREATIC LINE 4hi:1V SCALE IN FEET Jimmy L. Taggart Lic. No. THIS METHOD OF INLET PROTECTION IS APPLICABLE AT SECTION A -A � Emergency S p II I I w ay = 666.00 22a41 FILTER CLOTH KEY IN B"-9"; RECOMMENDED FOR ENTIRE PERIMETER Design High Water = 665.74 (25 -Year StormRISER } CREST5665.00URE \ SCALE 1" = 20' HORIZONTAL s1 CURB INLETS WHERE AN OVERFLOW CAPABILITY IS NECESSARY NOTES: 1. APRON LIUj 06 0 11111 milli I Willi I V�ffllili I ----- 8053 NING MAY BE RIPRAP, GROUTED RIPRAP, GABION Crest of 48" .RCP Riser = 665.00 ,� \ ONAL TO PREVENT EXCESSIVE PONDING IN FRONT OF THE STRUCTURE. BASKET, OR CONCRETE. Toe Of Dam = 661 .5O � PROJECTED SATURATED AREA -- - Ls=Y(Z+4) (1+S/0.25-5) \ 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED -- � „- USING PLATES 3.18-3 AND 3.18-4. ANTI -SEEP COLLARS Ls=f30-...�---- 20 10 0 20 40 • GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE 3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT Principal S p I 1 i W ay Design 2 -ANTI -SEEP COLLARS CSD 3.5'X3.5' SCALE IN FEET LESS THAN 6 INCHES. RCP Riser. Dia. = 48" (SEE DETAIL) SOURCE: VA. DSWC PLATE 3.07-& Source: Va. DSWC Plate 3.18-1 Trash Rack Dia. = 72" Trash Rack Ht. = 21 HDPE Barrel Length = 45.U' HDPE Barrel Dia. = 24" Inv. Out 24" HDPE Barrel = 660.75 STAIR STEPPING CUT SLOPES HDPE Barrel Slope=1.67 ��•-HDPE BARREL a -� (SEE DETAIL) DEBRIS FROM SLOPE OUTLET PROTECTION -�• � � ABOVE 1S CAUGHT -III-I 11- � (SEE DETAIL) . BY STEPS .. I I-1 � _ _----: DRAINAGE Il;i � IIII��_Iiilil- �~ o OUTLET PROTECTION SPECIFICATIONS �`�. � _�- �� l �• _ _ - CUT OFFTRENCH EXCAVATED INTO SUITABLE MAITERIAL III -III -I ((=I I=1 I � I �I�•I I -I I (TBD BY GEOTECH) WHERE APPLICABLE - ,--- �-,.,• _ �- ��'��� "`�� ,,,) � I- _,.;:._;_III '� � SEDIMENT BASIN/EXTENDED DETENTION +�ipNCEt:1TR�C SI -i RACK AND ANTI=VORTEX DEVICE PARAMETERS '�•-j-_. ��,"`_ �. �-- �`� .�-�� �d>��p 40"-50" I I I=III-_I I p C. 'CLI RI RAP OUTFLOW ' , J- �-�,'�"�--,.^ �•-- J -.-o'' -I I � I � oo 8" MIN. DEPTH 24 0 EACH LIFT OF THE FILL IS COMPACTED, BUT THE OUTER FACE/UNDERLYING F.F � RISER DIA.=48" I Q = 6 cfs {WORST CASE) cZ CYLINDER DIA.=72" ANTI- VORTEX DEVICE DESIGN OF THE SLOPE IS ALLOWED TO REMAIN LOOSE SO THAT THE 2 r*1 CYLINDER THICKNESS=16 GA. ROCKS, CLODS, ETC. REACH THE NATURAL ANGLE OF REPOSE. � voi MIN. NSDUPPORT BAR 11.25" PIPE OR 1.25"x1.25"x0.25"ANGLE I � I=III o RISER TOP THICKNESS=14 GA. C 10 GA. F PRESSURE RELIEF WATER, SOIL AND FERTILIZER APRON LENGTH = 10 n i) �� HOLES 1 -III- ARE HELD BY STEPS -PLANTS � /2 DIA. FILL SLOPE TREATMENT CAN BECOME ESTABLISHED ON -III=i l 1=1 11=1 1 I_ THE STEPS. � A O A © O TOP STIFFENER (IF REQUIRED) IS -X -X -ANGLE WELDED TO TOP AND ORIENTED PER - SOURCE: VA. DSWC PLATE. 3.29- SOURCE: VA. DSWC PLATE 3.29-1 O O PENDICULAR TO CORRUGATIONS. ,r.' _ SUPPORT ANGLES CR 0 d VINO SLOPES' w DIVERSION � 8�' UPPER ANCHOR TABS \` TOP IS -GAGE CORRUGATED O O O O METAL OR 1/8" STEEL PLATE. ----: � � O PRESSURE RELIEF HOLES MAY BE flMMITTED, IF ENDS OF X\ -WELDED CORRUGATIONS ARE LEFT FULLY DIVERSION PLAN VIEW OPEN WHEN THE TOP IS ATTACHMENT ATTACHED. \\. � _ Y;Fi_ •� III -I � }1 ( 10% SETTLEMENT � 12' LOWER ANCHOR TABS TACHCWELD CYLINDER IS GAGE CORRUGATED • --'�- � � /� r z "•- „y''.a� � � I I -!I -1F -) I ,=I � � � • / -fit \`-- ` .. "f ,. '` ALL. AROUND METAL PIPE OR FABRICATED FROM (� � I O 3 FREE BOARD 1.5"X1.5' (.5' STEEL ANGLE a• I I I I III � } } } } } i } i } 2 ®90' APART NOTCH 1 � CENTER & BOLT TOGETHER W/GALVANIZED H STEEL PLATE. 3/8'X3/4" BOLTS) ! III -I DESIGN FLOII DEPTH --.- NOTES: 8" MIN. 18" LOWER ANCHOR TABS a ' 1. THE CYLINDER MUST BE DOZER TREADS CREATE- �BOLT TO RCP RISER ° FIRMLY FASTENED TO THE GROOVES PERPENDICULAR lh4) t.5'x1.5'xa"" ANGLE TOP OF THE RISER. TO THE SLOPE. `"f y •' � : - I !� III (4) 3/8 X2" GALVANIZED BOLTS a e° n a 11VASHERS a. -..FS<< "- _ � t, •• -� GROOVING IS CUTTING FURROWS ��OQ'E � '��<�'�;� ^'•'• � � ALONG THE CONTOUR OF A SLOPE. sPACE2"- vBAR ° (#sPRa�BARAMW MIN.) a°. a - a � �.: ,° 2• SUPPORT BARS ARE WELDED Pr (TYPICAL) a < ' TO THE TOP OF THE RISER •••��-''• . �...�' IRREGULARITIES IN THE Soil �1___ TYPICAL VEE -SHAPED DIVERSION � BOLTEDATOETOPYOFTRSER. sem' SURFACE CATCH RAINWATER AND PROVIDE SOME COVERAGE OF LIME, � TRA RISER DIAMETER C��N� FERTILIZER AND SEED. � w SECTION A -A ISOMETRIC SOURCE: MICHIGAN SOIL EROSION AND SEDIMENTATION GUIDE PLATE. 3.29-4 SOURCE: VA. DSWC PLATE 3.29-2 Source: Va. DSWC Plate 3.12-1 o ,Fj Q LV t3 N CV i Q ® Q) Z } n V W>' U. W Z �� 5- 'V ow W Q UQ OW 04 o� 0Lo 9LU LU0 LL o� W0 rz � c 0 Q. z9 �00 0 Q� � W OUTLET PROTECTION 0do DIMENSIONS REVISIONS COUNTY COMMENTS MARCH 8, 2018 MM& _T_ DATE October 5, 2017 SCALE AS SHOWN CONTOUR INTERVAL N/A L y� LJ CD ' �.. �► z IY O �� w> z O �- 0 O 4 O LIJ yL�J �i.L 1.x.7 FILE NUMBER SHEET' of 11 SEDIMENT BASIN SCHEMATIC ANTI -,SEEP COLLAR ELE VA. TIONS TEMPORARY � BASIN CREST SPILLWAY EMERGENCY 680 680 DESIGN HIGH WATER (25 -YR. STORM ELEV.) :.:.::..::.::..�... SATURATED ZONE 0.5' ti .................... MIN. 1.0' ::.::.:.. ...... CONNECTIONS BETWEEN rr::�::.'..........................F,'i;;.,: .... .... ..... .. ..... THE ANTI -SEEP AND ... ........ RISER CREST:::.�:.�:::.:.�.�:.:::.:... 675 � 67 C.Y. AC. ........ ... DEWATERING THE BARREL MUST BE 675 �� .... WATERTIGHT � EXISTING GRADE STORAGE DEVICE DRY .................. ........... ............ 67 C.Y. AC. WET STORAGE k6_11-::::::;::;��1 I 1=III=111-� - .........:•::.::::::... � -._: - III-III-III-III=ill I -III I! I -III -III - =1I I_ I I -III -I I1=1 I11= I1=1I1=1II-1I1=1I I-1I1=_1I1=1I I I II -1 670 =1 SEDIMENT CLEANOUT POINT I � 1=1 11=1 � i 1=1 I I 11=1 11=1 11=1 11=1 I I -I 11=1 I I- I -1 � I 670 ;III�I1=1 _ _ _III IIS III-1II-1II-111=�=111=111 ,111-111-111-111=„IJ.,,IIIII�ITII�III�IIiII�I_ 48" RCP RISER -1 ! 1=1 11=1 11=1 11=1 11=1 I i= ILI -- 'I-111-11i�11i-1111111111i11�1� TOP=665.00 _ �! III=III=III- - 3:1 PROPOSED GRADE TOP OF DAM -666.50 DESIGN ELEVATIONS WITH �•"�c-�wATER1NG - EMERGENCY SOURCE: VA. DSWC PLATE. 3.14-4 ORIFICE=x:60 3:1 EMERGENCY SPILLWAY ss5 SPILLWAY 665 6s5 SOURCE: VA. DSWC PLATE. 3.14-2 - 2:1 (TO BE LANDSCAPED) P INLET PROTECTION OP OUTLET PROTECTION BOTTOM..... of SEDIMENT BASIN 66.1 ,50 _ �- 660 PIPE CUTLET CONDITIONS 660 BL D CK d'c GRAVEL CURB INLET - 45' OR 2�-" HDPE (BARREL ....INV IN=661':' 0 SEDIMENT F'IL TER A INV ouT=ssO�i5 SLOPE=1:67 _ CURB INLET 655 655 SEE DESIGN DETAILS FOR .........._ .... . PIPE OUTLET TO FLAT • __�-- �-- AREA WITH NO DEFINED 650 s50 CHANNEL •;•;:. _ PLAN VIEW 0+00 +20 +40 +60 +80 1 +00 +20 +40 +60 +80 2+00 +20 +40 +60 d• wQWQ d -NN 000 a00c0 NON I'�Or7 v--..\ ------ � a � ao r� ri � rte. r+y �r <t vi � ori �-�'-- L ao h co � cp cs� :fl u> ca cn � cfl U, C`) t0 to � Ct0 iG � CD xA � CD (� J-__ tD CO J WIRE SCREEN CONCRETE BLOCK d n- ---�-�'� GRAVEL FILTER EVENTS FOR TEMPORARY SEDIMENT BASIN -'--�---' SECTION A -A FILTER CLOTH KEY IN 6"-9"; RECOMMENDED FOR ENTIRE PERIMETER TEMPORARY SEDIMENT BASIN PARAMETERS EVENT INFLOW (CCAS) ROUTED (.-CFS) ELEVATION (FTI STORAGE (CUBIC YDS *PARAMTERS TO RIEMAIN FOR BMP CONVERSION TO EXTENDED DETENTION -SEE SWM DETAILS � � Total Design Drainage Area= 4.71 acres 2 -YR 14.79 5.28 665.14 475 RUNOFF OVERFLOW WATER WITH FILTERED WATER 3d (MIN. 10 -YR 26.21 21.96 665.60 584 SEDIMENT � a ) Basin Design Volumes: ... , Wet Storage - 25 -YR °' � •� � •� � ••. �� 1 I I I I� I I I' �I I I� I I I � 11 � 25 -YR 34.13 28.20 665.74 617 do 16 y I_I III III: -III III1.' Minimum Volume Req d s7 cy * 4 71 acres - 3 c IIIC_;� I � III' II ISI il� I.I 'n ° A 6.,..: '• ` ' III III III III II � Available Basin Volume Prov'd. = 347 cy C�? 664.60 ill III:: III II - � '. >=` ' •:'•. • � � ��•• it=III III= III ::_Lli PIPE OUTLET TO WELL Depth t0 Cleanout Elev. = 1.00 ft TOP OF EMBANKMENT=666.50 III I I ;: III III I i I III = I I III I_I I III � • • '. i I': III I I_I; DEFINED CHANNEL SCALE 1 " = 5 ' VERTICAL ,II I -�I I'_ III III:: III II. • :o '. III III Dry Storage- 0 W.S.E. 25-YR=665.74 5 SEDIMENT PLAN VIEW Minimum Volume Req d. = 67 cy * 4.71 acres = 288 cy W.S.E. 10-YR=665.60 �Tg ®�, W.S.E. 2-YR=665.14 � _ WIRE SCREEN Available Basin Volume Prov d. = 320 cy C�? 665.95 2" x 4" wooD sruD CURB INLET L a 4" Dewatering Orifice Invert = 664.60 z.5 ° Cleanout Elev. = 663.60;,,�� SPECIAL APPLICATION � Basin Design Elevations: \ o - d Top of Dam = 666.50 \ ASSUMED PHREATIC LINE 4hi:1V SCALE IN FEET Jimmy L. Taggart Lic. No. THIS METHOD OF INLET PROTECTION IS APPLICABLE AT SECTION A -A � Emergency S p II I I w ay = 666.00 22a41 FILTER CLOTH KEY IN B"-9"; RECOMMENDED FOR ENTIRE PERIMETER Design High Water = 665.74 (25 -Year StormRISER } CREST5665.00URE \ SCALE 1" = 20' HORIZONTAL s1 CURB INLETS WHERE AN OVERFLOW CAPABILITY IS NECESSARY NOTES: 1. APRON LIUj 06 0 11111 milli I Willi I V�ffllili I ----- 8053 NING MAY BE RIPRAP, GROUTED RIPRAP, GABION Crest of 48" .RCP Riser = 665.00 ,� \ ONAL TO PREVENT EXCESSIVE PONDING IN FRONT OF THE STRUCTURE. BASKET, OR CONCRETE. Toe Of Dam = 661 .5O � PROJECTED SATURATED AREA -- - Ls=Y(Z+4) (1+S/0.25-5) \ 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED -- � „- USING PLATES 3.18-3 AND 3.18-4. ANTI -SEEP COLLARS Ls=f30-...�---- 20 10 0 20 40 • GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE 3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT Principal S p I 1 i W ay Design 2 -ANTI -SEEP COLLARS CSD 3.5'X3.5' SCALE IN FEET LESS THAN 6 INCHES. RCP Riser. Dia. = 48" (SEE DETAIL) SOURCE: VA. DSWC PLATE 3.07-& Source: Va. DSWC Plate 3.18-1 Trash Rack Dia. = 72" Trash Rack Ht. = 21 HDPE Barrel Length = 45.U' HDPE Barrel Dia. = 24" Inv. Out 24" HDPE Barrel = 660.75 STAIR STEPPING CUT SLOPES HDPE Barrel Slope=1.67 ��•-HDPE BARREL a -� (SEE DETAIL) DEBRIS FROM SLOPE OUTLET PROTECTION -�• � � ABOVE 1S CAUGHT -III-I 11- � (SEE DETAIL) . BY STEPS .. I I-1 � _ _----: DRAINAGE Il;i � IIII��_Iiilil- �~ o OUTLET PROTECTION SPECIFICATIONS �`�. � _�- �� l �• _ _ - CUT OFFTRENCH EXCAVATED INTO SUITABLE MAITERIAL III -III -I ((=I I=1 I � I �I�•I I -I I (TBD BY GEOTECH) WHERE APPLICABLE - ,--- �-,.,• _ �- ��'��� "`�� ,,,) � I- _,.;:._;_III '� � SEDIMENT BASIN/EXTENDED DETENTION +�ipNCEt:1TR�C SI -i RACK AND ANTI=VORTEX DEVICE PARAMETERS '�•-j-_. ��,"`_ �. �-- �`� .�-�� �d>��p 40"-50" I I I=III-_I I p C. 'CLI RI RAP OUTFLOW ' , J- �-�,'�"�--,.^ �•-- J -.-o'' -I I � I � oo 8" MIN. DEPTH 24 0 EACH LIFT OF THE FILL IS COMPACTED, BUT THE OUTER FACE/UNDERLYING F.F � RISER DIA.=48" I Q = 6 cfs {WORST CASE) cZ CYLINDER DIA.=72" ANTI- VORTEX DEVICE DESIGN OF THE SLOPE IS ALLOWED TO REMAIN LOOSE SO THAT THE 2 r*1 CYLINDER THICKNESS=16 GA. ROCKS, CLODS, ETC. REACH THE NATURAL ANGLE OF REPOSE. � voi MIN. NSDUPPORT BAR 11.25" PIPE OR 1.25"x1.25"x0.25"ANGLE I � I=III o RISER TOP THICKNESS=14 GA. C 10 GA. F PRESSURE RELIEF WATER, SOIL AND FERTILIZER APRON LENGTH = 10 n i) �� HOLES 1 -III- ARE HELD BY STEPS -PLANTS � /2 DIA. FILL SLOPE TREATMENT CAN BECOME ESTABLISHED ON -III=i l 1=1 11=1 1 I_ THE STEPS. � A O A © O TOP STIFFENER (IF REQUIRED) IS -X -X -ANGLE WELDED TO TOP AND ORIENTED PER - SOURCE: VA. DSWC PLATE. 3.29- SOURCE: VA. DSWC PLATE 3.29-1 O O PENDICULAR TO CORRUGATIONS. ,r.' _ SUPPORT ANGLES CR 0 d VINO SLOPES' w DIVERSION � 8�' UPPER ANCHOR TABS \` TOP IS -GAGE CORRUGATED O O O O METAL OR 1/8" STEEL PLATE. ----: � � O PRESSURE RELIEF HOLES MAY BE flMMITTED, IF ENDS OF X\ -WELDED CORRUGATIONS ARE LEFT FULLY DIVERSION PLAN VIEW OPEN WHEN THE TOP IS ATTACHMENT ATTACHED. \\. � _ Y;Fi_ •� III -I � }1 ( 10% SETTLEMENT � 12' LOWER ANCHOR TABS TACHCWELD CYLINDER IS GAGE CORRUGATED • --'�- � � /� r z "•- „y''.a� � � I I -!I -1F -) I ,=I � � � • / -fit \`-- ` .. "f ,. '` ALL. AROUND METAL PIPE OR FABRICATED FROM (� � I O 3 FREE BOARD 1.5"X1.5' (.5' STEEL ANGLE a• I I I I III � } } } } } i } i } 2 ®90' APART NOTCH 1 � CENTER & BOLT TOGETHER W/GALVANIZED H STEEL PLATE. 3/8'X3/4" BOLTS) ! III -I DESIGN FLOII DEPTH --.- NOTES: 8" MIN. 18" LOWER ANCHOR TABS a ' 1. THE CYLINDER MUST BE DOZER TREADS CREATE- �BOLT TO RCP RISER ° FIRMLY FASTENED TO THE GROOVES PERPENDICULAR lh4) t.5'x1.5'xa"" ANGLE TOP OF THE RISER. TO THE SLOPE. `"f y •' � : - I !� III (4) 3/8 X2" GALVANIZED BOLTS a e° n a 11VASHERS a. -..FS<< "- _ � t, •• -� GROOVING IS CUTTING FURROWS ��OQ'E � '��<�'�;� ^'•'• � � ALONG THE CONTOUR OF A SLOPE. sPACE2"- vBAR ° (#sPRa�BARAMW MIN.) a°. a - a � �.: ,° 2• SUPPORT BARS ARE WELDED Pr (TYPICAL) a < ' TO THE TOP OF THE RISER •••��-''• . �...�' IRREGULARITIES IN THE Soil �1___ TYPICAL VEE -SHAPED DIVERSION � BOLTEDATOETOPYOFTRSER. sem' SURFACE CATCH RAINWATER AND PROVIDE SOME COVERAGE OF LIME, � TRA COUNTY COMMENTS MARCH 5, 2018 DATE October 5, 2017 SCALE AS SHOWN CONTOUR INTERNAL N/A FILE NUMBER 8053 SHEET 8of11 GENERAL BIORETENTION NOTES: / 1. ALL DRAINAGE AREAS TO A BIORETENTION FACILITY ARE TO BE WITH STABILIZED PRIOR TO INSTALLATION OF AMENDED SOILS, MULCH OR ���/// NTI FACI I E DETENTION / SOD (REQUIRED FOR FIRST PLANTINGS. 680 680 F PLANTING YEAR) 2. AMENDED SOIL WILL ONLYAS B VALID - - REPORT. NO AMENDED SOIL SHALL I BE ALLOWEDTHE ESIIDE SLOPES. PROPOSED GRADE yF� Q N CLEANOUT WITH THREADED LJD_ PRE REATMENT BIORETENTION CELL < 3. UNDERDRAIN PIPE SHOULD BE MIN. 6" PERFORATED SCHEDULE 40 PVC RETAINING WALL � (TOP TO BE 6" ABOVE W/ 36" OF CLEAN WASHED #57 MAXIMUM PONDING (PER AASHTO M278) OR DOUBLE WALL HDPE (PER AASHTO M252). OVERFLOW OUTLET STRUCTURE y y y yy yy y GRAVEL TO INCLUDE UN AT 100 FEET PERFORATIONS SHOULD BE 3/8" SPACED 6" ON CENTER ALONG 4DERLYING ELEVATION, EXISTING GRADE I _ _ yW yy yy y APPLICABLE y y y y y y y y -Y y y J• y y y MAX. HORIZ. SPACING) LONGITUDINAL ROWS SPACED 90' APART. 675 FILTER FABRIC y y I 675 .Y y y y •Y y y W W y y y y y y y y 'L y y y:.. •.y, y. V .. y.. .. ...,•.. '. ',... y y y y y y y y 4. UNDERDRAIN CLEANOUTS SHOULD EXTEND A MIN. OF 6" ABOVE .... _ ...... _._.... _ _ _ ........ ___._ - __... _..... y y CLEANOUT MAY BE FLUSH WITH TOP MAXIMUM PONDING ELEVATION ONE 8>,. _.... 4 RCP RISER _. - ... ....... y y y ... ... .: r.... ..;::`...,.>:::.. .. .:. .. ..:. J .,-.-...-•- .�-....�'. ..... _ _..... y W y OF SURFACE TO ALLOW DRAWDOWN. 6» C EANOUTS (TYP.) WITH THREADED - _. TO -665 0 ....... y y ":. I , _.. :...',:•`:...:::. ;.; y y y --_.. LL.. LOCATED C� 50' APART. MAX. r» (1) 5 0 LOW OUTLET PIPE (CONNECT TO v 5. ONLY SMALL MATURING TREES ARE ALLOWED TO BE PLANTED IN THE AMENDED SOILS. 670 " - - - FLOW ORIFICE=661.75 670 ADEQUATE DRAINAGE SYSTEMS29` . i DOWNGRADIENT) �e� y y . .. .. ... ..... ,./�y/ 6. A PERMANENT MAINTENANCE ACCESS EASEMENT MUST BE PROVIDED -- y Y y _ `` AROUND THE PERIMETER OF ALL BMPS TO ALLOW FOR ADEQUATE - 6 MAXIMUM PONDING DEPTH --- ... a> ....., ..._ ... ....... y y J' y y W y W W -Y y y y y V •Y y a Q ...., •Y y MAINTENANCE AND REPAIR. I .... TOP OF DAM=666.50 .. .... ... .... y y y y y Y O O O O � 7. AMENDED SOIL WILL ONLY BE PERMITTED WITH A VALID SOIL ANALYSIS ..._.< ..._. _.,._. _...57.._..._..._... ..._... _..._.__ 1 3:1 EMERGENCY 4�0 REPORT. 665 - -_ --__= -___ .. _. ...:.........---------------------------------.: _.-,-.: - ...:_. __ 4,.- SPILLWAY 666..00 665 8. INSTALL WIRE SCREENING AS NECESSARY AROUND ALL OUTLET -.. •:• •: - o.° 2.1 TO BE LANDSCAPED OPENINGS TO PREVENT LOSS OF MULCH ST -ORM SEWER..... , . , , ._. . , , . .............. _ ................... . LNV. LN=666._00 '� PRETREATMENT AND ENERGY DISSIPATION (TYP. FOR STORM DRAINAGE .............. .. ... .... , . ALL CONCENTRATED FLOW LOCATIONS- SEE DESIGN EASEMENT (TYP) y DETAILS AS LOCATION MAY VARY) 660 BOTTOM OF EXTEN ��d.-,lig .. , D 660 PLAN 3" SHREDDED. MULCH BIORETENTION FACILITY DETENTION FACILI ' ASPHALT PAVEMENT OR OTHER STRUCTURAL BIORETENTION PLAN = 661.00..._. BIORETENTION WITH EXTENDED _ ..661:50 COMPONENTS 3" OF #8 (CHOKER STONE 45' OF 24" HDPE BARREL- ARREL NOT TO SCALE NOT DETENTION PARAMETERS 36" OF APPROVED 12" OF #57 WASHF�D STONE INV IN --661.50 OPTIONAL 2"-3' STONE WITH FILTER 655 1ORETENTION SOIL MEDIA BELOW CHOKER STONE LAYER INV OUT=660.75 655 FABRIC AROUND BOTTOM AND SIDES (RECOMMENDED ADJACENT TO PAVEMENT Total Post Development Drainage Area- 4.15 acres 6" RIGGID SCH 40 PVC SE DESIGN DETAILS FOR 1' MIN WIDTH, 1' MIN DEPTH) UNDERDRAIN OR EQUIVALENT I 18" NYLOPLAST DIMENSIONS • CORRUGATED HDPE @1.0% SLOPE DRAINAGE BASIN W/ DOME GRATE Bioretention Design Volumes: R I RAIN OVERFLOW OUTLET STRUCTURE COVERED WITH WIRE MESH 3" DOUBLE HAMMERED 6" PONDING DEPTH > TO INCLUDE UNDERLYING FILTER Bioretention Surface Area Required= 4,150 SF 6 SCH 4o PVC OUTLET q PVC AND AS NECESSARY (BEYOND) HARDWOOD FABRIC BETWEEN (SEE DETAIL)- MULCH LAYER Bioretention Surface Area Provided- 4,300 SF 650 CHOKER STONE 650 29_x__ SOD ON SIDE -SLOPES Hardwood Mulch Top = 665.50 0+00 +20 +40 +60 +80 1+00 +20 +40 +60 +80 2+00 +20 +40 +60 Bioretention Media Top- 665.25 # 8 Choker Stone Top= 662.25 �.� LLJW d-Od- n0� morn non cV tO no CV C4 6 6 CV C6 (6 c+ 4 #57 Washed Stone Top= 661.00 (0 CO (D(� (o(0E- (0� rh lh 6 rn ��CID J �i 3" MULCH LAYER X �- 0 v 0 o F\ -0" 04'-0"W �L l 10' MIN. 2' T _ FILTER MEDIA SEE BMP DESIGN \ M N O Extended Detention Design Elevations: CL 4 MIN. MEDIA = 6 To of Dam 66.50 P UAL F \ I _ SURFACE MAN OR SOIL \ `: '•' ' AREA PARAMETERS. Emergency Spillway = 666.00 SLOPE Design High Water = 665.11(100 -Year Storm ) POST BMP CONVERSION STAGE STORAGE SCALE 1" T 5 VERTICAL ...�"� OUTLET PIPE 1'-0" GRAVEL LAYER AROUND Crest of 48" RCP Riser = 665.00 _ 5. .5% MIN SLOPE - - UNDERDRAIN �� (1) 5 Low Flow Orifice = 661.75 Elev(Ft) Storage(CF) Storage(CY) Area(SF) Toe of Dam - 661.50 661.500 0.000 0.000 49.904 ; 21.5 I UNDERDRAIN GRAVEL BED 662.000 55.783 2.066 186.577 (#57 WASHED STONE) WITH FILTER FABRIC Extended Detention Principal Spillway Design: P P664.000 850.596 31.504 754.705 NON -WOVEN AROUND TOP, BOTTOM AND RCP Riser Dia. = 48 666.000 3482.473 128.980 1949.009 0 SCALE INFEET SECTION A -A SIDES, TYP. Trash Rack Dia. = 72 668.000 8871.719 328.582 3472.167 BIORETENTION CROSS-SECTION Trash Rack Ht. = 21 " 670.000 17531.665 649.321 5217.504 SCALE 1" = 20' HORIZONTAL NOT TO SCALE HDPE Barrel Length = 45.0' HDPE Barrel Dia. = 24" ---_ -- _- - Inv. Out 24" HDPE Barrel = 660.75 20 10 0 20 40 HDPE Barrel Slope = 1.67% SCALE IN FEET STORM EVENTS FOR BIORETENTION FACILTY EVENT INFLOW (CFS) ROUTED (CFS) 2 -YR 14.79 2.37 10 -YR 26.17 3.20 100 -YR 48.73 4.97 NYLOPLAST 18" DRAIN BASIN: 2818AG X �,L H Op _ _ �� STORM EVENTS FOR EXTENDED DETENTION FACILITY _ f EVENT INFLOW (CFS) ROUTED (CFS) ELEVATION (FI) STORAGE (CF' t f,' ANNUAL BMP (1, 2) INTEGRATED DUCTILE IRON FRAME& GRATE TO MATCH BASIN O.D. 2 -YR 2.37 2.57 664.89 2022 Jimmy L. Taggart MAINTENANCE REQUIREMENTS Lic. No. 0 18" MIN WIDTH GUIDELINE 10 -YR 3.20 3.32 664.95 2100,0 22841 Od0 BIORETENTION 100 -YR 4.97 4.97 665.11 2311 ♦ MOWING OF GRASS FILTER STRIPS AND BIORETENTION TURF COVER AT LEAST 4 TIMES A YEAR MINIMUM PIPE BURIAL 8" MIN THICKNESS GUIDELINE SPOT WEEDING, EROSION REPAIR, TRASH REMOVAL, AND MULCH DEPTH P RAKING TWICE DURING GROWING SEASON (3) VARIABLE INVERT HEIGHTS MANUFACTURER • ADD REINFORCEMENT PLANTING TO MAINTAIN DESIRED THE AVAILABLE (ACCORDING TO RECOMMENDATION (5) ADAPTER PLANS/TAKE OFF) (MIN. MANUFACTURING ANGLES TRAFFIC LOADS: CONCRETE SLAB DIMENSIONS ARE FOR VEGETATION DENSITY AS NEEDED REQ. SAME AS MIN. SUMP) VARIABLE O° -360° GUIDELINE PURPOSES ONLY. ACTUAL CONCRETE SLAB MUST BE REMOVE INVASIVE PLANTS USING RECOMMENDED CONTROL METHODS ACCORDING TO DESIGNED TAKING INTO CONSIDERATION LOCAL SOIL CONDITIONS, AS NEEDED PLANS TRAFFIC LOADING, & OTHER APPLICABLE DESIGN FACTORS. STABILIZE THE CONTRIBUTING DRAINAGE AREA TO PREVENT EROSION SEE DRAWING NO. 7001-110-111 FOR NON TRAFFIC INSTALLATION. AS NEEDED DAM CONSTRUCTION NOTES: • SPRING INSPECTION AND CLEANUP + SUPPLEMENT MULCH TO MAINTAIN A (3) VARIABLE SUMP DEPTH ACCORDING TO PLANS 1. GEOTECHNICAL CONSULTANT TO SPECIFY DAM EMBANKMENT MATERIAL, SEEPAGE CONTROL DEVICES, CUT-OFF TRENCH DESIGN, CULVERT 3 INCH LAYER PRUNE TREES AND SHRUBS (6° MIN. BASED ON BEDDING REQUIREMENTS AND OTHER APPROPRIATE GEOTECHNICAL DESIGN REQUIREMENTS. REMOVE SEDIMENT IN PRE-TREATMENT CELLS AND INFLOW (4) VARIOUS TYPES OF INLET &OUTLET ADAPTERS AVAILABLE: 4"-18" FOR CORRUGATED HDPE (ADS N-12/HANCORDUAL WALL, MANUFACTURING REQ.) 4" MIN 2. IMPERVIOUS CORE SHALL EXTEND TO THE 10 -YR WATER SURFACE ELEVATION UNLESS OTHERWISE NOTED. POINTS POINTSONCE EVERY 2 TO � YEARS CEEVERY2TTHE ADS/HANCOR SINGLE WALL), N-12 HP, PVC SEWER (EX: SDR 35), 3. FOUNDATION AND ABUTMENT AREA EXTENDING 10' BEYOND DAM FOOTPRINT SHALL BE CLEARED, GRUBBED AND STRIPPED OF ALL • E MULCH AYEREVERY3YEARS PVC DWV (EX: SCH 40), PVC C900/C905, CORRUGATED & RIBBED PVC VEGETATION TOPSOIL AND/OR ORGANIC SOIL AND OTHER UNSUITABLE MATERIALS. EXTENDED DETENTION 4. AFTER CLEARING, GRUBBING, STRIPPING, AND REMOVING ANY OTHER UNSUITABLE MATERIALS, THE SUBGRADE SHALL BE PROOF -ROLLED THE BACKFILL MATERIAL SHALL BE CRUSHED STONE OR OTHER WITH COMPACTION EQUIPMENT UNDER THE OBSERVATION OF A QUALIFIED ENGINEER. THE COMPACTION EQUIPMENT SHALL CONSIST OF WATERTIGHT JOINT (CORRUGATED HDPE SHOWN) GRANULAR MATERIAL MEETING THE REQUIREMENTS OF CLASS I, THE HEAVIEST POSSIBLE EQUIPMENT THAT WILL NOT CAUSE DISTURBANCE OF SUITABLE SUBGRADE SOILS. EXCESSIVELY SOFT OR IN • MEASURE SEDIMENT ACCUMULATION LEVELS IN FOREBAY. CLASS II, OR CLASS III MATERIAL AS DEFINED ASTM D2321. UNSUITABLE MATERIALS SHALL BE REMOVED AND REPLACED WITH COMPACTED FILL. WHERE ROCK IS EXPOSED AFTER STRIPPING OR BEDDING & BACKFILL FOR SURFACE DRAINAGE INLETS SHALL BE • MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED. PLACED & COMPACTED UNIFORMLY IN ACCORDANCE WITH ASTM D2321. UNDERCUTTING, ALL LOOSE ROCK MATERIAL SHALL BE REMOVED PRIOR TO PLACING COMPACTED FILL. ROCK SUBGRADES SHALL BE RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE INSPECTED AND APPROVED BY INSPECTOR OR ENGINEER PRIOR TO PLACEMENT OF FILL. THE PRESENCE OF ANY INVASIVE PLANT SPECIES. 5. COMPACTED FILL SHALL NOT BE PLACED PRIOR TO PERFORMING THE REQUIRED FOUNDATION AND ABUTMENT PREPARATION, OR ON ANY • INSPECT THE CONDITION OF STORMWATER INLETS TO THE POND FOR FROZEN SURFACE. COMPACTED FILL SHALL EXTEND TO THE FILL LIMIT LINES AND GRADES INDICATED ON THE APPROVED CONSTRUCTION MATERIAL DAMAGE, EROSION OR UNDERCUTTING. PLAN. COMPACTED FILL MATERIAL SHALL BE OF THE TYPE CLASSIFICATION SYMBOL SPECIFIED BY THE GEOTECHNICAL CONSULTANT, OR • INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR OF A BETTER QUALITY MATERIAL AS DEFINED BY THE UNIFIED SOIL CLASSIFICATION SYSTEM (USCS). RESTRICTIONS ON LIQUID LIMIT AND EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY PLASTICITY INDEX OF MATERIAL MAY BE INCLUDED WHERE APPLICABLE. COMPACTED FILL SHALL CONSIST OF MATERIAL FREE OF GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT ORGANIC MATTER, RUBBISH, FROZEN SOIL, SNOW, ICE, AND PARTICLES WITH SIZES LARGER THAN 3" OR ANY OTHER DELETERIOUS INTEGRITY. 1 -GRATES/SOLID COVER SHALL BE DUCTILE IRON PER ASTM A536 GRADE 70-50-05. THIS PRINT DISCLOSES SUBJECT MATTER IN WHICH DRAWN BY EBC 2 - FRAMES SHALL BE DUCTILE IRON PER ASTM A536 GRADE 70-50-05. MATERIAL 3130 VERONA AVE BUFORD, GA 30518 MATERIAL. • INSPECT POND OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, NYLOPLASTHASTHE RECEIPT OFTHIPROPRPRINTTARY DOESGHTS. 3 -DRAIN BASIN TO BE CUSTOM MANUFACTURED ACCORDING TO PLAN DETAILS. OR POSSESSION OF THIS PRINT DOES NOT CONFER, PATE 04.03.06 � " " PHN(770)932.2443 6. COMPACTED FILL SHALL BE PLACED IN HORIZONTAL LAYER of 10 -12 IN LOOSE THICKNESS. ACTUAL LIFT THICKNESS SHALL BE RIP -RAP DISPLACEMENT, WOODY GROWTH, ETC. RISERS ARE NEEDED FOR BASINS OVER 84" DUE TO SHIPPING RESTRICTIONS. TRANSFER, OR LICENSE THE USE OF THE DESIGN OR Nyloplasf FAX(770)932.2490 SPECIFIED BY THE GEOTECHNICAL CONSULTANT. THE MOISTURE CONTENT SHALL BE CONTROLLED SUCH THAT COMPACTION IS ACHIEVED • INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR SEE HEREIN REVISED BY NMH AINDRAWING 4 -DRAINAGE CONNECTION STUB JOINT TIGHTNESS SHALL CONFORM TO REPRODUCTION OF THIS PRINT OR ANY INFORMATION EGON ECTIONSTU65. TECHNICAL INFORMATION OF THIS PROJECTNO.INAME www.nyloplast-us.com WITHOUT YEILDING OF THE SURFACE. EACH LAYER SHALL BE UNIFORMLY COMPACTED WITH SUITABLE COMPACTION EQUIPMENT TO AT TITLE EVIDENCE OF SPALLING JOINT FAILURE LEAKAGE CORROSION ETC. ASTM D3212 FOR CORRUGATED HDPE (ADS N-12/HANCOR DUAL WALL), N-12 HP,&PVC SEWER. CONTAINED HEREIN, OR MANUFACTURE OF ANY DATE 03.14.16 181NDRAIN BASIN QUICK SPEC INSTALLATION DETAIL LEAST 95% OF STANDARD PROCTOR MAXIMUM DENSITY IN ACCORDANCE WITH ASTM D-698, AASHTO T-99, OR VDOT SPECIFICATIONS. • INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR ROM,FORTHECIFICWRIRETOOTHERS 5 -ADAPTERS CAN BE MOUNTED ON ANY ANGLE O'TO 360'. TO DETERMINE MINIMUM IS FORBIDDEN, IS FORBIDDEN, EXCEPT BY SPECIFIC WRITTEN ANY LAYER OF FINE GRAINED FILL WHICH BECOMES SMOOTH SHALL BE SACRIFICED TO A DEPTH OF 2" TO ALLOW ADEQUATE BONDING FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING LEAKAGE, DEBRIS ANGLE BETWEEN ADAPTERS SEE DRAWING NO.7001-110-012. DWG SIZE A PERMISSION FROM NYLOPLAST. 02013uYLOPLAsT SCALE i:30 SHEET 1 OF 1 DWG N0. 7001.110.191 REV E BETWEEN LAYERS. ACCUMULATION, ETC. 7. COMPACTED FILL WITH A MOISTURE CONTENT WHICH WILL NOT PERMIT COMPACTION TO THE SPECIFIES DENSITY STANDARD SHALL BE INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY SACRIFICED, DRIED, OR WETTED AS NECESSARY TO PERMIT PROPER COMPACTION. VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. • INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE POND FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY. COUNTY COMMENTS MARCH 5, 2018 DATE October 5, 2017 SCALE AS SHOWN CONTOUR INTERNAL N/A FILE NUMBER 8053 SHEET 8of11 10, 660 400' OF EXISITNG TYPICAL CREEK PROFILE (PRE 655 650 DEVELOPMENT 660 655 rows. 645 I I I 1645 0+00 +20 +40 +60 +80 1+00 +20 +40 +60 +80 2+00 +20 +40 +60 +80 3+00 O N L? 0� Iq d 1N O O cD to cD co (D O to 660 400 0F EXISITNG TYPICAL CREEK PROFILE (POST 655 f +20 +40 +60 +80 CD 00 to 4+00 DEVELOPMENT) 660 655 Klect 645 645 0+00 O uo to +20 +40 +60 +80 N 'ch to 1+00 Iq hi VADCRSWPP Performance Based Water Quality Calculation Procedure Tette Ie:s,ttu; Project: Old Trail Village Block 22 Locatity; Albernade Go. I'r a Ipasr Date 26 -,fan -18 Situation Worksheet No. 2 Stnslnalyt ofsit ado,a2 criteria: linan calculation prcx:edLity STEP I €lou STEP 3; Worksheet 1: rFats€ ieAistiag Area_ 4.15 ac;. I posy.= 92t;0 E, ate, ted= - '-- Ieo t¢t_= 0':'S I:-'atlse Ieatstrug +20 +40 +60 +80 2+00 +20 +40 c O O 4�6 CSD t�D EXISTING CREEK CHANNEL TYPICAL CROSS-SECTION i --- (VISUAL INSPECTION) ; NTS 10 YR WSE r., 2..Y�R WSE..._..._ ^' 2.O �T .lf _. _...__. y f I i � � I =j I { j I I � �sI, I Std} Deternihie the relative pre-developlawnt pollutant load (L'o'). Ltesed on Existing Irnpelvious. Cover ry 4 • C) FT I. Lpre(esistlne) _ [0.05' (d.f)f)9 x. 1;, 2.18 (Equation 5 -1.6. 1 tiltese: Lr,, ,. t : , = vlati elzra-develop rlatltt©hlphosp4lorot; load (pottidsperyeir) V �' CR SW 1sti,,g ttt ii,pl i„u, ,AtiH fife nt .,p, -=_ed ie l4`h.tt lft,nb ,) VA L71f {ti *Y7 YYPP A - applicable area (acres,) Performance Based Water Quality Calculation Procedure Lyre(esistin;) _ [''mi + (0.009 x 3" o ] x 4,15 x 2.28 Project: Old Trail Village Block 22 0.47 pouids per year Loealty Albemarle Co. Dat e: 06 -?Aar -18 Sit+.iafion Workshe e t No. 2 -' Ll,retn iter;hea> _ [U.US - (.Crt)v xi. ,)] x A x 2.28 iEq€teflon -5-16) Sturnnary of Situtlion 2 criteria: itoarcalc i bortgrocedtae STEP I dirty STEP 3. Worksheet l: =,vbere: L,,, (,,;a e;fEd = relui e pie-developinent total phosphororz load (potinds per year) Area= 4,15 ac. t.aaE:£ti:fd mexag,i:md,:uczr con dtiien fol spaiiu:ratr'rahzd oritialita aYt6e Cl.=,>ay =;1<?Elly ti;4aalt c'dncd 16%,"p-nc_pres<.ed ui ltitnte„u=,ricers} Ipoy`= 92110 A = applicable area (acres) x°aFers3a = ti o L;ire(,iatershed) = [0.05 (0.009 x 30"t, )] x 4.15 x 2.23 = pounds per year SHUATIoN' 4 False. li srruk,flo-I Deter-Inine the relative pre developineut pollutant load (Lv,,)• 7 r'E'' T I43t5rf31� t)`% �I,Y 16% EXISTING CHANNEL L,, = [0.05 - (0.009. I,,,01 x A x, 2.28 (Equation 5-21) 3iPY5Iked 3 NO est and Rectangular d.ztt%. Ipeet 92/ 1-1-b'd 96°fo Base Dimension: tpe-== post -development >eiions cover (percent ep r,'ssed inwhole iturnbeIs) Base Dimension: I .ring E>unug sit unpex••feu= a ex t,,crceu[ z.�re_scduF .. iscie tomboy.} Wetted Perimeter: A = applicable area (acres) Wetted Perimeter: A = applicable area (acres) Area of Wetted 1pasr = [0.05 + t;€0]09 x 92% )1 x 4.15 x 2.25 Srr Lid TION. 3 Lpe(existiug) 10,0' _ (i.f Q9 x 0`%0 j] x 4.15 x 2.28 laNe 1-i'ting 0% 1 �'ittate hod $6I 5te12 6 De terwine the relative pollutant renrov"al regnirenlent (FAR). Channel Slope: t LpCef,,.�fet.sh tl) _ [0,05 + (0,009 x 1. , t -hl r)] x ii x 2.2& (Equation 5-16) SHUATIoN' 4 False. li Sfe Deter-Inine the relative pre developineut pollutant load (Lv,,)• 15 1 180774 listing B&IP Based on Existing impervious Cover EXISTING CHANNEL L,, = [0.05 - (0.009. I,,,01 x A x, 2.28 (Equation 5-21) Ct1RRENTLYIN 3 NO est PLACE? Rectangular Dimensions: Stejr f Defernnue the relative )cost-det'eioptnent pollutant load (T,.). Sfe Deter-Inine the relative pre developineut pollutant load (Lv,,)• 15 1 180774 0 EXISTING CHANNEL Based on Existing impervious Cover EXISTING CHANNEL L,, = [0.05 - (0.009. I,,,01 x A x, 2.28 (Equation 5-21) LJJ ll I vte(exisaing> _ [O.US _ (O.Ot)9 : I,ziS ,n_)] c .? r, 2.25 (Equation 5-161 Channel Type: est Channel Type: Rectangular Dimensions: r where: Lpa,t = ref3ti<e post-tevalupiien€ totalplosp2oot: land (pots§s per cenr Dimensions: -;, - Iehine pra deve.o priert total phospholous load (pt old, per year) Gletc Lpr:r Base Dimension: tpe-== post -development >eiions cover (percent ep r,'ssed inwhole iturnbeIs) Base Dimension: I .ring E>unug sit unpex••feu= a ex t,,crceu[ z.�re_scduF .. iscie tomboy.} Wetted Perimeter: A = applicable area (acres) Wetted Perimeter: A = applicable area (acres) Area of Wetted 1pasr = [0.05 + t;€0]09 x 92% )1 x 4.15 x 2.25 Area of Wetted Lpe(existiug) 10,0' _ (i.f Q9 x 0`%0 j] x 4.15 x 2.28 Cross Section: pouuldspery-eat' Cross Section: 0.4t potaids per year 5te12 6 De terwine the relative pollutant renrov"al regnirenlent (FAR). Channel Slope: t LpCef,,.�fet.sh tl) _ [0,05 + (0,009 x 1. , t -hl r)] x ii x 2.2& (Equation 5-16) Manning's n RR = Lr.y;: - t,0.9 ti Lp Manning's n Y"here: L a. tehtiv pre-detieiOpnlelYt total phosphorous load (potuaas per year) of Channel: RR = E.3 0.4 of Channel: I.3t„y:d aei r3cos candrti,n±;tr sp its uatz: shedxtw it%vr thr Fhe>gc Sar u# tsa ue mrd°oi =,_-rat yrrsssites r. I nuu zesj Discharge: RR= 7.57 pounds per year or Discharge: A = applicable area (acres) Depth of Flow: RFA = Lon;t L -•,e _er_t: dt Depth of Flow: 10.05 - (0.009 x 16'>i, x• 4.15 x 2.28 l Velocity: RR = 8.3,,. 1.8 Velocity: pre(n ateYshed)-[ = ea petards per year Channel Lining: RR= 6.46 portuds per year Channel Lining: Earth, F. Uniform,Weeds/Grass Freeboard: Variable Step v Determine the relative post -development pollutant load 4lpus=) Depth: Ilse Rif= 6.48 (lessere'alttz) Depth: Variable -Consistent 2.00 ft 0 CM, S Lpast = [w)5 (0,009 x I_,e-.-)] r A x 2.2.8 (Equation 5-21) Step 7 Identify best dnauragernent practice (B -11P) for the site. r 1. Detettruate lite I'2gtlaYd pv1ltI.illtrecl offal elfclertcy for €kr site: where: L__ = rclitn-e poxt-developrnenttotal pbosphorous load (poimids per year) Lij = post-devzelopriKtu iinperviou, cover (percent expressed m vvhclle rauribers) EFF RFs' = so i x Ii) (Equation 5-� >) UJ • A = applicable area (acres) tcliere: EFF = ,zgtined palhttanr reniocal ethclencr- - ; Lpa;t - [0.0_ (0.� 9 _ l 4.15 x 228 LU Pith = pollutant renioval requireille It( (pounds per yeal.) - _ ?.2J poelll s per year L,, „, = re hive pest-devei ipr__ent fetal phospltoto load, Equation5-21 (pourids per year) Stets 6 Detertaine the relative polliltant aeiuoeal regbdreineitt(RR). EFF = 6 4 . 3.24 x 100= 78°& RR = Lpast - ((3.9 pLPr:r� 2, Select BNIP(s) Rorty Table 5-14 an d locate n the s tet RR = 8.3 r0.4 Drainage IrripervXus RR= 75,7 potntdsper year Type Ef`ciency Area (s.f) Area (s.f.) Descr°ptior: or B -NIP 1' Binreteotion go IaO774 165960 Bf:,1P A RR = Lpeet - Lprc(,iatorg,vq; Bl1.P 2: Extended Detention _ 15 180774 3 Biv£P B FAR = 8.3 1.8 SNIP 3: - - - BMP C RR= 6.46 Iliote?ds per year BMP4: BMP D SNIP 5: M. P E Use RR= 6.46 lesser ralue) +60 +80 3+00 +20 +40 +60 � O Ste 7 Identifi- best rwatia etrienf practice 1 � t; P (BMP) for fire site, i. Deterinine flue regttiredpollutant renovalefficieney for tile site: EFF = l; R -R = I •a x 100 (Equation 5-22) p�.st , ; Where: EFF = rctlui ,:d polhatant removal efficiency i RR = pollutant r ntov'alrecii4erneta (poturds per year) Lpiz. _ relative post-de`,elopirreut total phosphorous ctad, E:luation 5-21(poutldsp,-i';'ear) EFF = 6.41 3.31 x loo= 77';'6 , 2. SeiectBNIP(>) lioniTable 5-14 arid locate on die site: D-nlr3c9 e Ind e ev4 -R P � Type Effc erccy Area (s.f.) Area (SA) Description: B -NIP 1: BMP2: BNIP3: SNIP 4: BMP5: Biotetestion 94 150774 1659G0 Extended Detention 15 1 180774 0 EXISTING CHANNEL PARAMETERS ERODIBLE). EXISTING CHANNEL PARAMETERS (ERODIBLE) LJJ Channel Type: Rectangular Channel Type: Bt•,1P A BMP 3 BMP C; BitP D Btv1P E 3. Deterriene tate PALaarit l0dd enterirs4 lira p£ttposed 13_M1P(s): L&v£t? = [0-U5 - (0.009 x In,,n,)] x Apr,rsaiP x 2-28 (Equation 5-21) :v-heie: La.,IP = iehrv-, post-devcloprrxnt totalphosphorouu load eiaerkaa proposed BNIP (potauis per year) lsr.P = post-det'elapnlent percent ilrlpeiviatls cnvar to proposed SNIP s1>z2'czi)t appressed iIt i,'hatz lituritrci's) Ap„pn;,,P = drainage area to proposed BNIP (acres) LB11P1 [0_(i5 + (4).009 921n )i x 4.15, x 2.28 8.29 poruids per car LBx€P2 ='0.05 + (0.009 ti 0?0 )] x 4.15 < 2.28 - 0.47 pounds, per, year L€ .\U'3 = [0.05 (0-009 t 00.0 )] X 0 0 x 2.28 0.96 pouLdS per year Lsa€rs = [0,05 + (0,009 x M? )] x 0-00 x 2.25 0.00 pounds per year LB1iP5 = [0) 05 + (0,009 x 0"-,-e )] x 0.00 x 228 = 0.00 you yds per year 4, Calculate the polki ant load reuarte; by the proposed BN•IP(s): Lremoved - EffilziP x La_,tP (Equation 5-24) , Isere- r, _.. = post-dev'eloprsent total phuspliororz load reran wd by proposed BNiP (pounds per year') E$'d_,;P = polhttaia renioval eliiciency ofBN•IP (e�xprassed ii decirritl ibi-ii) LB, = rel tiv'z post-devekprixni total plrvspherotu load entering proposed BNLp, Equation 5-23 (poi Ads per yeas') Lr�nnaved s3iP2 = 7.46 Pounds pet year removed I-fenfa}ed,"S3£P'- 11.07 Pounds per year removed Lrema,ea:Y3iPa- 0.00 Pounds per year removed I remo,edr61£PR 0.00 Pounds per year removed L'tematied;n3iP> - "o PauniiS Pet year removed 5. Cak Mate the total polhaant load renDved by the BIN P(s): I'remared!totxi - Lrcrno•✓edsgp?'...(Equation 5-25) where: L,Q,m.,=sat,; = t£atal polht(ant load ret?iued by proposed BN'IPs (porntds per pear) L, Yc dB ,Pi - pollutant load i inoved by proposed BNIP No. 1,Equation. 5-24 Lr d.3 x.2- - pollutant load rerrtov'ed by proposed Blv'iP No. 2. Equation 5-24 L, mos as,tPz =poll arrt load I'c tied by proposed 13N'P No, 3, Equation 5-24 Lt. , Ada-,,P-polhtiallt load rern ved by proposed BNIP No, 4, Equultion 5-24 L,v . ant,IP, = poil alit load removed by proposers BNIP No. 5, Equation 5-24 Lremo,edltotal = 7.80 Total Pounds per year-retrroverl 6. N'eiil},conpHance: Ltentu,ed-mtat=RR Lye-W-d',.I = Total Pounds pe; year removee Req'd Removal= 6.41 Total Pounds per yearlemoved OKS Sz'.c-vncvrfl Rat- Exceed d +80 4+00 2 YEAR POST -DEVELOPMENT STORM EVENT 10 YEAR -POST DEVELOPMENT STORM EVENT EXISTING CHANNEL PARAMETERS (ERODIBLE) EXISTING CHANNEL PARAMETERS (ERODIBLE) Channel Type: Rectangular Channel Type: Rectangular Dimensions: Dimensions: Base Dimension: 4.50 ft Base Dimension: 4.50 ft Wetted Perimeter: 4.98 ft Wetted Perimeter: 5.06 ft Area of Wetted Area of Wetted Cross Section: 1.08 ft2 Cross Section: 1.26 ft2 Channel Slope: 1.5000 % Channel Slope: 1.5000 % Manning's n Manning's n of Channel: 0.0275 of Channel: 0.0275 Discharge: 2.57 cfs (10 -YR POST) Discharge: 3.32 cfs (10 -YR POST) Depth of Flow: 0.24 ft Depth of Flow: 0.28 ft Velocity: 2.39 fps Velocity: 2.62 fps Channel Lining: Earth, F. Uniform,Weeds/Grass Channel Lining: Earth, F. Uniform,Weeds/Grass Freeboard: Variable Freeboard: Variable 'fir y+ACy Depth: Variable -Consistent 2.00 ft Depth: Variable -Consistent 2.00 ft a/ i' STREAM CHANNEL EROSION. b. Adequacy of all channels and pipes shall be verified in the following manner: (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 channel bed or banks. Q2YR PRE -DEVELOPMENT = 2.99 CFS Q2YR POST -DEVELOPMENT = 2.57 CFS Q2YR POST -DEVELOPMENT = 2.57 CC'S S Q2YR PRE -DEVELOPMENT = 2.99 CFS 9VAC2"70-98 FLOODING. A. Downstream properties and waterways shall be protected from damages from localized flooding due to changes in runoff rate of flow and hydrologic characteristics, including, but not limited to, changes in volume, velocity, frequency, duration, and peak flow rate of stormwater runoff in accordance with the minimum design :standards set out in this section. B. The 10 -year postdeveloped peak rate of runoff from the development site shall not exceed the 10 -year predeveloped peak rate of runoff. 010YR PRE -DEVELOPMENT = 9.30 CFS 010YR POST -DEVELOPMENT = 3.32 CFS Q10YR POST --DEVELOPMENT = 3.32 CFS 5 Q10YR PRE -DEVELOPMENT = 9.30 CFS STREAM CHANNEL EROSION 8t: FLOODING ANALYSIS A portion of the exisitng creek that will receive site runoff was visually inspected by Roudabush, Gale & Assoc. in order to obtain design information to evaluate existing conditions, as well as post -development conditions. The following observations/evaluations were made: 1. The creek appeared to be a rectangular channel with moderate to steep side slope banks. The banks varied in height but showed consistency of 2 feet or more. Water was present in the channel with a gentle flowing depth of 3-3.5 inches. The width of the creek channel varied between 4-5 feet. The creek appeared in good health and lined with natural earthen cover with some tall grass and weeds present. Soils appeared to be clay loam with natural erosion. 2. Calculations were run using the pre -development and post development conditions for the two and ten year storm events and were evaluated as such. 3. The bmp measures put forth for the proposed development provide a reduction in the runoff velocity exiting the site for both the two and ten year storm events. Projected values for the flow depth in the channel were obtained by forecasted linear trend methods and appear to show no threat of overtopping the banks of the existing channel. By reducing the velocity exiting the site, the measures will be providing additional relief of natural erosion of the exisiting channel banks, thus satisfying 9VAC25-870-97. 4. While the volume of flow will increase naturallty due to the project development, the rounoff from the site will be routed through multiple, complex design measures that will react to the increased volume and account for the peak intensity the hydrograph produces flrom the two and ten year storm events. No localized flooding is visually present at this time in the existing channel. The bmp measures will decrease the rate of flow that is exiting the site, reduce the velocity, and spread the peak intensity over a longer duration during a storm event, thus decreasing localized flooding satisfying 9VAC25-870-98. LT x o �,,p v� 000 ,, 1 % r'' Jimmy L. Taggart Lic. No. A� 22841 �c o­4�sSjONAL��� REVISIONS0) 2 YEAR PRE -DEVELOPMENT STORM EVENT 10 YEAR PRE -DEVELOPMENT STORM EVENT EXISTING CHANNEL PARAMETERS ERODIBLE). EXISTING CHANNEL PARAMETERS (ERODIBLE) LJJ Channel Type: Rectangular Channel Type: Rectangular Dimensions: Dimensions: Base Dimension: 4.50 ft Base Dimension: 4.50 ft Wetted Perimeter: 5.03 ft Wetted Perimeter: 5.58 ft Area of Wetted Area of Wetted Cross Section: 1.18 ft2 Cross Section: 2.44 ft2 Channel Slope: 1.5000 % Channel Slope: 1.5000 % Manning's n Manning's n of Channel: 0.0275 of Channel: 0.0275 Discharge: 2.99 cfs (10 -YR PRE) Discharge: 9.30 cfs (10 -YR PRE) Depth of Flow: 0.26 ft Depth of Flow: 0.54 ft Velocity: 2.52 fps Velocity: 3.81 fps Channel Lining: Earth, F. Uniform,Weeds/Grass Channel Lining: Earth, F. Uniform,Weeds/Grass Freeboard: Variable Freeboard: Variable Depth: Variable -Consistent 2.00 ft Depth: Variable -Consistent 2.00 ft 2 YEAR POST -DEVELOPMENT STORM EVENT 10 YEAR -POST DEVELOPMENT STORM EVENT EXISTING CHANNEL PARAMETERS (ERODIBLE) EXISTING CHANNEL PARAMETERS (ERODIBLE) Channel Type: Rectangular Channel Type: Rectangular Dimensions: Dimensions: Base Dimension: 4.50 ft Base Dimension: 4.50 ft Wetted Perimeter: 4.98 ft Wetted Perimeter: 5.06 ft Area of Wetted Area of Wetted Cross Section: 1.08 ft2 Cross Section: 1.26 ft2 Channel Slope: 1.5000 % Channel Slope: 1.5000 % Manning's n Manning's n of Channel: 0.0275 of Channel: 0.0275 Discharge: 2.57 cfs (10 -YR POST) Discharge: 3.32 cfs (10 -YR POST) Depth of Flow: 0.24 ft Depth of Flow: 0.28 ft Velocity: 2.39 fps Velocity: 2.62 fps Channel Lining: Earth, F. Uniform,Weeds/Grass Channel Lining: Earth, F. Uniform,Weeds/Grass Freeboard: Variable Freeboard: Variable 'fir y+ACy Depth: Variable -Consistent 2.00 ft Depth: Variable -Consistent 2.00 ft a/ i' STREAM CHANNEL EROSION. b. Adequacy of all channels and pipes shall be verified in the following manner: (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 channel bed or banks. Q2YR PRE -DEVELOPMENT = 2.99 CFS Q2YR POST -DEVELOPMENT = 2.57 CFS Q2YR POST -DEVELOPMENT = 2.57 CC'S S Q2YR PRE -DEVELOPMENT = 2.99 CFS 9VAC2"70-98 FLOODING. A. Downstream properties and waterways shall be protected from damages from localized flooding due to changes in runoff rate of flow and hydrologic characteristics, including, but not limited to, changes in volume, velocity, frequency, duration, and peak flow rate of stormwater runoff in accordance with the minimum design :standards set out in this section. B. The 10 -year postdeveloped peak rate of runoff from the development site shall not exceed the 10 -year predeveloped peak rate of runoff. 010YR PRE -DEVELOPMENT = 9.30 CFS 010YR POST -DEVELOPMENT = 3.32 CFS Q10YR POST --DEVELOPMENT = 3.32 CFS 5 Q10YR PRE -DEVELOPMENT = 9.30 CFS STREAM CHANNEL EROSION 8t: FLOODING ANALYSIS A portion of the exisitng creek that will receive site runoff was visually inspected by Roudabush, Gale & Assoc. in order to obtain design information to evaluate existing conditions, as well as post -development conditions. The following observations/evaluations were made: 1. The creek appeared to be a rectangular channel with moderate to steep side slope banks. The banks varied in height but showed consistency of 2 feet or more. Water was present in the channel with a gentle flowing depth of 3-3.5 inches. The width of the creek channel varied between 4-5 feet. The creek appeared in good health and lined with natural earthen cover with some tall grass and weeds present. Soils appeared to be clay loam with natural erosion. 2. Calculations were run using the pre -development and post development conditions for the two and ten year storm events and were evaluated as such. 3. The bmp measures put forth for the proposed development provide a reduction in the runoff velocity exiting the site for both the two and ten year storm events. Projected values for the flow depth in the channel were obtained by forecasted linear trend methods and appear to show no threat of overtopping the banks of the existing channel. By reducing the velocity exiting the site, the measures will be providing additional relief of natural erosion of the exisiting channel banks, thus satisfying 9VAC25-870-97. 4. While the volume of flow will increase naturallty due to the project development, the rounoff from the site will be routed through multiple, complex design measures that will react to the increased volume and account for the peak intensity the hydrograph produces flrom the two and ten year storm events. No localized flooding is visually present at this time in the existing channel. The bmp measures will decrease the rate of flow that is exiting the site, reduce the velocity, and spread the peak intensity over a longer duration during a storm event, thus decreasing localized flooding satisfying 9VAC25-870-98. LT x o �,,p v� 000 ,, 1 % r'' Jimmy L. Taggart Lic. No. A� 22841 �c o­4�sSjONAL��� REVISIONS0) LJJ .s LU s co LU .. go "' •Ld LL ♦6 CO 6 LU 08 J 4 `04 04R. cc INC • ' M LL s • LL sLU Lao 0 CM, S LU r Lij UJ • LU % COUNTY• MARCH 5, f. DATE October 5, 2017 SCALE ASSHOWN CONTOUR INTERVAL NA co LJJ .s UJ co LU i ♦6 CO Z<0W W cc M LL LU UJ • FILE NUMBER 8053 SHEET 9of11 COUNTY COMMENTS MARCH 5, 2018 ®ATE October 5, 2017 ;GALE 1 " = 10, CONTOUR INTERVAL 2 Fr FILE NUMBER 8053 SHEET 10 of 11 COUNTY COMMENTS MARCH 5, 2018 GATE i3ctober 5, 2®17 SCALE ill = 80' CONTOUR INTERVAL 2 Fr FILE NUMBER 8053 SHEET 11 of 11