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HomeMy WebLinkAboutWPO202100033 Plan - Submittal (First) WPO VSMP 2021-03-21EROSION & SEDIMENT CONTROL NOTES ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS 9VAC25-840-40 EROSION AND SEDIMENT CONTROL REGULATIONS. ES-2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES-3: SEDIMENT BASINS, TRAPS, AND ANY OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCES TAKE PLACE. PERIMETER DIKES AND SEDIMENT BARRIERS SHALL BE CONSTRUCTED AS A SECOND STEP IN ANY LAND DISTURBING ACTIVITY. ES-4: STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. ES-5: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN INCLUDING THE NARRATIVE SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES-6: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES-7: THE CONTRACTOR IS RESPONSIBLE FOR THE INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES-8: ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-9: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES-10: 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. ES-11: PERMANENT OR TEMPORARY SOIL STABILIZATIONS SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE A FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED FOR LONGER THAN 14 DAYS). PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. ES-12: A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT, IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. ES-13: DURING CONSTRUCTION OF THE PROJECT SOIL STOCK PILES SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. ES-14: CUT AND FILL SLOPES SHALL BE CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OR PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. ES-15: ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT. ES-16: BEFORE NEWLY CONSTRUCTED STORM WATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONS, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL. ES-17: WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST EXTENT POSSIBLE DURING CONSTRUCTION NONERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF ARMORED BY NONERODIBLE COVER MATERIALS ES-18: WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN A SIX-MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF NONERODIBLE MATERIAL SHALL BE PROVIDED. ES-19: THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETE. ES-20: TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS. ES-21: UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA: A. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME. B.EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. C.EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE OR BOTH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OF OFF -SITE PROPERTY. D.MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE STABILIZATION. E. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS. F. APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH. ES-22: WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROAD BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. ES-23: ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. ES-24: ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THEY WILL BE INSPECTED FOR UNDERMINING, DETERIORATION, EROSION, AND EXCESS DEPOSITED MATERIAL. ALL DEFICIENCIES WILL BE CORRECTED IMMEDIATELY. EXCESS MATERIAL WILL BE SPREAD ON THE SITE IN A MANNER WHICH WILL NOT LEAD TO FURTHER EROSION POTENTIAL. ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH TEMPORARY OR PERMANENT SEEDING WITHIN 7 DAYS FOLLOWING FINISH GRADING. SEEDING SHALL BE DONE ACCORDING TO STANDARD & SPECIFICATION 3.31 TEMPORARY OR 3.32 PERMANENT SEEDING, OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND DCR TECHNICAL BULLETIN #4. APPLICATION RATES FOR MULCH, FERTILIZER, LIMESTONE AND SEEDING MIXTURE SHALL BE AS INDICATED BELOW. TEMPORARY PERMANENT SPECIES LBS/ACRE SPECIES LBS/ACRE ANNUAL RYEGRASS & CEREAL RYE 50-100 KENTUCKY 31 FESCUE 128 ANNUAL RYE GRASS 60-100 RED TOP GRASS 2 GERMAN MILLET 50 SEASONAL NURSE CROP* 20 TOTAL 160-250 TOTAL 150 *USE SEASONAL NURSE CROP AS INDICATED BELOW ❑ SEPT. 1st - FEB. 15th g$ ANNUAL RYE & CEREAL RYE ❑ MAR. - MAY 15th ANNUAL RYE ❑ FEB. 16th - APR. 30th ANNUAL RYEGRASS ❑ MAY 16th - AUG. 15th FOXTAIL MILLET ❑ MAY 1st - AUG. 31st GERMAN MILLET ❑ AUG. 16th - OCT. ANNUAL RYE ❑ NOV. - FEB. WINTER RYE FERTILIZER: 10-10-10 0 450 LBS/ACRE (10 LBS/1,000 SF) FERTILIZER: 10-20-10 0 500 LBS/ACRE (12 LBS/1,000 SF) PULVERIZED AGRICULTURAL UMESTONE: 2 TONS/ACRE (90 LBS/1,000 SF) I PULVERIZED AGRICULTURAL UMESTONE: 2 TONS/ACRE (90 LBS/1,000 SF) ORGANIC MULCH MATERIALS AND APPLICATION RATES VESCH TABLE 3.35-A RATES MULCHES PER ACRE PER 1000 SF NOTES: 1j - 2 TONS 70 - 90 Ibs. FREE FROM WEEDS AND COARSE MATTER. MUST BE ANCHORED. STRAW OR HAY (MIN. 2 TONS FOR SPREAD WITH MULCH BLOWER OR BY HAND WINTER COVER) FIBER MULCH MINIMUM 35 Ibs. DO NOT USE AS MULCH FOR WINTER COVER OR DURING HOT, DRY 1500 Ibs. PERIODS.* APPLY AS SLURRY CORN STALKS 4 - 6 tons 185 - 275 Ibs. CUT OR SHREDDED IN 4-6" LENGTHS. AIR DRIED. DO NOT USE IN FINE TURF AREAS. APPLY WITH MULCH BLOWER OR BY HAND. FREE OF COARSE MATTER, AIR-DRIED. TREAT WITH 12 Ibs. WOOD CHIPS 4 - 6 tons 185 - 275 Ibs. NITROGEN PER TON. DO NOT USE IN FINE TURF AREAS. APPLY WITH MULCH BLOWER, CHIP HANDLER, OR BY HAND. BARK CHIPS OR 50 - 70 c.y. 1 - 2 c.y. FREE OF COARSE MATTER. AIR-DRIED. DO NOT USE IN FINE TURF SHREDDED BARK AREAS. APPLY WITH MULCH BLOWER, CHIP HANDLER, OR BY HAND * WHEN FIBER MULCH IS THE ONLY AVAILABLE MULCH DURING PERIODS WHEN STRAW SHOULD BE USED, APPLY AT A MINIMUM RATE OF 2000 Ibs./ac. OR 45 Ibs./1000 sq. ft. ENTRANCE \ \s APPROXIMATE LOCATION OF `OAS! TRANSITION FROM PUBLIC �F` ROAD TO PRIVATE DRIVE S'O DYERS MILL LN. / RT. 713 x EXISTING DRIVEWAY I� / `\ "X EXISTING SERVICE ENTRANCE ss TO SITE \ O 1900. \x �I \ // GRAPHIC SCALE 300' 0 300, 600' SCALE: 1 "=300' LEGEND EXISTING BUILDING - PROPOSED BUILDING SITE DESIGN: BLACKWELL ENGINEERING ATTN: NATHAN BLACKWELL 566 EAST MARKET STREET HARRISONBURG, VA 22801 540-432-9555 DEVELOPER: BROC TROXELL 7369 DYERS MILL LANE SCOTTSVILLE, VA 24590 570-4120364 PROPERTY INFO: TM #129-5 7369 DYERS MILL LANE SCOTTSVILLE, 24590 MAN. DISTRICT- SAMUAL MILLER AREA = 399.71 ACRES ZONED: Rural Areas PROPOSED USE: AGRICULTURAL - POULTRY HOUSES FEMA FLOOD ZONE: X DISTURBED AREA = 7.65 AC PROPOSED ROAD/EOP EXISTING ROAD APPROXIMATE PROPERTY LINE 0 GRAVEL AREA 0 CONCRETE AREA Q © REVISION SYMBOLS ___}23e___ EXISTING CONTOURS 1z� PROPOSED CONTOURS 0000c0 PROPOSED/EX DITCH OR SWALE + 28.5 PV PROPOSED SPOT ELEVATION 4#= DRAINAGE FLOW cas CONSTRUCTION ROAD STABILIZATION (3.03) O SILT FENSE (3.05) iv STORM DRAIN INLET PROTECTION (3.07) av CULVERT INLET PROTECTION (3.08) DD TEMPORARY DIVERSION DIKE (3.09) SB TEMPORARY SEDIMENT BASIN (3.14) oP OUTLET PROTECTION (3.18) VICINIT IAP SCALE: "=1000' i 824' Ij­­1 \ ROUGH, UNADJUSTED CUT/FILL ESTIMATES CUT- 22,000 YD3 FILL- 21,600 YD3 NET- 400 YD3 CUT EXTRA NOTES: sR SURFACE ROUGHENING (3.29) 1. THE OWNER AND CONTRACTOR MAY NEED TO MAKE MODIFICATIONS TO THE PLANS TO MATCH FIELD CONDITIONS. THE To TOPSOILING (3.30) CONTRACTOR SHALL VERIFY THAT EXISTING TOPO LINES ON PLANS GENERALLY DISPLAY FIELD CONDITIONS. IF A SIGNIFICANT DISCREPANCY IS FOUND, CONTRACTOR SHALL NOTIFY ENGINEER. >s O TEMPORARY SEEDING 3 31 ( ) Ps PERMANENT SEEDING (3.32) 2. TOPO INFORMATION WAS OBTAINED FROM BLACKWELL ENGINEERING. uu MULCHING (3.35) 3. PROPERTY LINE OBTAINED FROM COUNTY GIS. TO BE USED AS A GENERAL REFERENCE ONLY. e/w SOIL STABILIZATION BLANKETS AND MATTING (3.36) 4. EROSION SEDIMENT CONTROL MEASURES TO BE INSTALLED FIRST, GRADING OF BUILDING PAD TO PROCEED ONCE DISTURBED AREA MEASURES ARE IN PLACE AND STABILIZED WITH SEED/MULCH. ROAD TO BE GRAVELED, AND OPEN AREAS TO BE SEEDED ONCE GRADING ALLOWS. ESC MEASURES TO BE REMOVED AND SEEDED ONCE COUNTY ADMINISTRATOR ALLOWS. NUMBERS IN PARENTHESES REFER TO VESCH MEASURES 5. SLOPES GREATER THAN 3:1 ARE TO BE TREATED AS CRITICAL AREAS. NOTE: FOR THE PURPOSES OF PLAN REVIEW AND APPROVAL, NATHAN H. KNOPP, P.E. IS THE CERTIFIED RESPONSIBLE LAND DISTURBER (CRLD). CONTRACTOR SHALL PROVIDE REPLACEMENT CERTIFICATE AT TIME OF CONSTRUCTION TO THE COUNTY E&SC ADMINISTRATOR. NOTE: CONTRACTOR TO PROVIDE A CERTIFIED RESPONSIBLE LAND DISTURBER UPON PERMIT REQUEST FROM COUNTY E&SC ADMINISTRATOR. CRLD FOR THIS PROJECT IS: NAME CERT.# SEDIME4T-'BASIN TO BE CONVERTED TO DRY POND AT- \ \ THE'END OF CONSTRUCTION.SEE AE:FAIL-OFT SHEET 3. \ \ \ \ \ 'W6------- `THICKNESS=_]4-''-��---' \ ' GR+ \ \ \ �0.0 - - la►�+.�ulv.�, _�i:mro�nmmTr•>m 111111111112111111111 NOTE: THE ENTIRE STORMWATER PLAN WILL BE RE-EVALUATED AND NEW CONTROL AND TREATMENT MEASURES IMPLEMENTED AS NEEDED FOR ANY CHANGE TO OPEN SPACE/ MANAGED TURF/ IMPERVIOUS COVER. OWNER RECOGNITION: NAME DATE: IMIURNLZ:A=14 J>=14 nV 1 1 I A9 Piz\ `---_ \\ 9s 01 9 00 I , 49B L E' I\ Ddp PN \ \ r PV\01.1 67 pV \\ 15" HOPE INLET OR EQUIV. , \ ' TOP=500.3 103 LF OF 15" X 704 178' LF OF 15" \ \ \ 15" INVERT=495.6NHDPE PIPE ® 1.4% 50� RY HOUS71L� HOPE PIPE ® 1.1% 15" HOPE INLET OR EQUIV. \ pV 0j''Z R / \ TOP=500.3 / 7 PV 15" INVERT=495.5 E=502f 15" INVERT-496.0 PV \ / ' O 15" INVERT=495.9 01 \ \ \ %O o1.s\ 5 HT -15 019\ 7 o'ca t\ �v pV +P pV \\ 9 \\\ \ 1.7 pVi ��- _ -501 - _ _$1r(r - \ \ _1 - �\023.0'- / pv 01.1 A-P 01 4 CRS .2 pV+ E37 LF OF 15 - - .2 pV+ \ 37 LF OF 15" \ .2 pV+ \ - - - - - `� HDPE PIP@-11 47 / \ \ \ HOPE PIPE 0 1.1 % \ - �� \ .> p - 501 ° 01.6 01.0 1 I O�9 pV 23.0' - - - - - i 6 PV - \OTr 01.9 I o1 j \ PROPOSED 1 \ pV 63 X 704 15" HOPE INLET OR EQUIV. _ o \ 15" HOPE INLET OR EQUIV. 90.5 LF OF 15" TOP=500.3 O rn N 75.0' TOP=500.3 HDPE PIPE ® 1.27 POULTRY HOUSE 90 LF OF 15" +P 15" INVERT=496.1 HOPE PIPE ® 1.1% 15" INVERT=496.4 7 I ' - FFE=502f 15" INVERT=496.3 P\ 01• _ \ 0. G P`1 01.1 15" INVERT=496.0 _ - \ \ - HEIGHT -15 01.9 pv DEMPOKE O BE REMOVED - AT 9 500 \ _ 07 �� / \ - 9 ® O1, D OF PROJECT - - -- \- - - ----- M - TEMPORARY DITCH TO E - - - - - EMOVED AT THE END \�\------------------ / �� __CRS - OF PECi� laws,,, _ _ / / \ \ \ \ j\ TO LITTER , \50 S02 ----' '-_\ \ F :FFE=504 EXISTING _ BUILDING APPROX 50'X36' \ _moo------ __,- L-----I GRAHIfiC SCALE SCALE: 1"=50' Date- 3/21 /21 EScale. 1 "=50' Designed by: NHK Drawn by. BWK Checked by: NHK a O E aE v p N XX 00 C N LL J +-, N v7 C a a In lu a'i a N a ^ y tla r y L N Y j m u •� uta o m m O C - imW a 'D ° `ms E W Inxalu Revision Dates Q J LLI LIJ O C N z � O C7 J J � = N Z _J )- W J Q � 00 Q L O V O_ULLIJ 0 )- 5 J W 0 v) m H X 0) O U 0 rM r� Lr) Drawing No. 1 of 3 Sheets =No.888 HSG 1 EXISTING DRAINAGE AREAS rx /i/ r I / /If j //llllijllI//I lI7 �Jl ll f '/////i// ii%IIJJIII�I 11 1 I I l "�-•///////�' ///// �////ice,;,/, / f )J jI r \\\� \\II1J �(1f////////i�%%/i �N l/////` \//W/f I/ // )///�/)IIIIIII� \\\\\\\lZ) I �`�\ / l �/ \I11\\� = \\\I�liillll�r.., �/.IIII\�t — / GRAPHIC SCALE 200 0 200 400 SCALE: 1 "=200' BOUNDARY LINE OBTAINED FROM COUNTY GIS. TO BE USED AS A GENERAL REFERENCE ONLY ESC DRAINAGE AREAS r i—%%//( 7.09 ACRES TO SEDYEt{TIB;S\N\ 1; J / /// _J I I I �'�Ijllll� \\\\II II III III / // //__/ // //// — If\ \Il(j ) Illlll l� \\\\\\\iZ) I 111Jlf I / \ 1\ I /lllf \Il lt_J �J l(lll///// l l (III I f I I I I If I / 1 200' GRAPHIC Soo LE 400' SCALE: 1 "=200' WATER QUALITY MASTER PLAN PROPOSED DRAINAGE AREAS .50 ACRES TO DI #1 /ACPEAORS- MANAGED TURF S IMPERVIOUS �,33 I / / / //5 �5_ O DI #2 17/ Cggs IaA AGED TURF / / / Y.) ACRE�64,s //�3 Ci2 �RVIOUS 1.95 .ADO/ IbNXI/ V1 � / / i 5'/ iP x I I I (/ l (/ /j/ // /// /� � � I I I I I I / / ��I ( IA j � MiE \\\IIII/////—�J/II / r lj 11I /i ; Xz/i////i'iii/ i//� �/ / / ( fill /ll (( m I(# vtEo�3u� F\ E�1T EJVR )2\ ack �t jR� �//) III 7 /1��/rX�p�dAvr�#rLrz�// 6�AR�1 a�dgE�ifrcrP� l= p--% q�Jll0 200' GRAPHIC Soo LE 400' SCALE: 1 "=200' LIMITS OF ANALYSIS HYDROLOGIC ' � SOIL GROUP % • �� 0 B MANAGED TURF 111 • ® B MANAGED TURF _ IMPERVIOUS '• 39 PROJECT AREA • OPEN SPACE = 17.50 ACRES � / MANAGED TURF = 4.45 ACRES (57.72 % OF DIST. AREA) IMPERVIOUS = 3.26 ACRES (42.28 % OF DIST AREA) .000, 20o GRAPHIC Soo LE 1400' SCALE: 1"=200' f Arowntown POINT A 7.09 ACRES FROM SITE 116.72 ADD. ACRES FROM EASTERN STREAM 128.32 ACRES FROM WESTERN STREAM APPROXIMATELY 250 ACRES TOTAL 1 >1000 ACRES � emm""" - t 0 / TO TOTIER CREEK ki I \1 -v err I •0 r j CONTROL POINT FOR SURVEY CONTROL POINT FOR SURVEY Soo GRAPHIC Soo LE ,000' SCALE: 1"=500' ♦I Date: 3/21 /21 Scale: AS NOTED Designed by: NHK Drawn by: BWK Checked by: NHK `r 0 o � Ln� p X N pp LL C N v7 C a a L W a'i a N Ln "awl atl0 ; y j m u •� utn o m C � coca _ a ttDD �mE Lru- Lnxa W Revision Dates Z LL.I Q J Lu O N Z O J = J N J >- L'"I J Q � W 0 :2 Q Li O J C U LLI J J W O v) O X m H H (.0 O M O Drawing No. 2 of 3 Sheets Job No. 2888 MINIMUM STANDARDS 1. Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site. Temporary soil stabilization shall be applied within seven days to denuded areas that may not be at final grade but will remain dormant for longer than 14 days. Permanent stabilization shall be applied to areas that are to be left dormant for more than one year. 2. During construction of the project, soil stock piles and borrow areas shall be stabilized or protected with sediment trapping measures. The applicant is responsible for the temporary protection and permanent stabilization of all soil stockpiles on site as well as borrow areas and soil intentionally transported from the project site. 3. A permanent vegetative cover shall be established on denuded areas not otherwise permanently stabilized. Permanent vegetation shall not be considered established until a ground cover is achieved that is uniform, mature enough to survive and will inhibit erosion. 4. Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to trap sediment shall be constructed as a first step in any land -disturbing activity and shall be made functional before upslope land disturbance takes place. 5. Stabilization measures shall be applied to earthen structures such as dams, dikes and diversions immediately after installation. 6. Sediment traps and sediment basins shall be designed and constructed based upon the total drainage area to be served by the trap or basin. a. The minimum storage capacity of a sediment trap shall be 134 cubic yards per acre of drainage area and the trap shall only control drainage areas less than three acres. b. Surface runoff from disturbed areas that is comprised of flow from drainage areas greater than or equal to three acres shall be controlled by a sediment basin. The minimum storage capacity of a sediment basin shall be 134 cubic yards per acre of drainage area. The outfall system shall, at a minimum, maintain the structural integrity of the basin during a 25-year storm of 24-hour duration. Runoff coefficients used in runoff calculations shall correspond to a bare earth condition or those conditions expected to exist while the sediment basin is utilized. 7. Cut and fill slopes shall be designed and constructed in a manner that will minimize erosion. Slopes that are found to be eroding excessively within one year of permanent stabilization shall be provided with additional slope stabilizing measures until the problem is corrected. 8. Concentrated runoff shall not flow down cut or fill slopes unless contained within an adequate temporary or permanent channel, flume or slope drain structure. 9. Whenever water seeps from a slope face, adequate drainage or other protection shall be provided. 10. All storm sewer inlets that are made operable during construction shall be protected so that sediment -laden water cannot enter the conveyance system without first being filtered or otherwise treated to remove sediment. 11. Before newly constructed stormwater conveyance channels or pipes are made operational, adequate outlet protection and any required temporary or permanent channel lining shall be installed in both the conveyance channel and receiving channel. 12. When work in a live watercourse is performed, precautions shall be taken to minimize encroachment, control sediment transport and stabilize the work area to the greatest extent possible during construction. Nonerodible material shall be used for the construction of causeways and cofferdams. Earthen fill may be used for these structures if armored by nonerodible cover materials. 13. When a live watercourse must be crossed by construction vehicles more than twice in any six-month period, a temporary vehicular stream crossing constructed of nonerodible material shall be provided. 14. All applicable federal, state and local requirements pertaining to working in or crossing live watercourses shall be met. 15. The bed and banks of a watercourse shall be stabilized immediately after work in the watercourse is completed. 16. Underground utility lines shall be installed in accordance with the following standards in addition to other applicable criteria: a. No more than 500 linear feet of trench may be opened at one time. b. Excavated material shall be placed on the uphill side of trenches. c. Effluent from dewatering operations shall be filtered or passed through an approved sediment trapping device, or both, and discharged in a manner that does not adversely affect flowing streams or off -site property. d. Material used for backfilling trenches shall be properly compacted in order to minimize erosion and promote stabilization. e. Restabilization shall be accomplished in accordance with this chapter. f. Applicable safety requirements shall be complied with. 17. Where construction vehicle access routes intersect paved or public roads, provisions shall be made to minimize the transport of sediment by vehicular tracking onto the paved surface. Where sediment is transported onto a paved or public road surface, the road surface shall be cleaned thoroughly at the end of each day. Sediment shall be removed from the roads by shoveling or sweeping and transported to a sediment control disposal area. Street washing shall be allowed only after sediment is removed in this manner. This provision shall apply to individual development lots as well as to larger land -disturbing activities. 18. All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization or after the temporary measures are no longer needed, unless otherwise authorized by the VESCP authority. Trapped sediment and the disturbed soil areas resulting from the disposition of temporary measures shall be permanently stabilized to prevent further erosion and sedimentation. 19. Properties and waterways downstream from development sites shall be protected from sediment deposition, erosion and damage due to increases in volume, velocity and peak flow rate of stormwater runoff for the stated frequency storm of 24-hour duration in accordance with the following standards and criteria. Stream restoration and relocation projects that incorporate natural channel design concepts are not man-made channels and shall be exempt from any flow rate capacity and velocity requirements for natural or man-made channels: a. Concentrated stormwater runoff leaving a development site shall be discharged directly into an adequate natural or man-made receiving channel, pipe or storm sewer system. For those sites where runoff is discharged into a pipe or pipe system, downstream stability analyses at the outfall of the pipe or pipe system shall be performed. b. Adequacy of all channels and pipes shall be verified in the following manner: (1) The applicant shall demonstrate that the total drainage area to the point of analysis within the channel is 100 times greater than the contributing drainage area of the project in question; or (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; (b) All previously constructed man-made channels shall be analyzed by the use of a 10-year storm to verify that stormwater will not overtop its banks and by the use of a two-year storm to demonstrate that stormwater will not cause erosion of channel bed or banks; and (c) Pipes and storm sewer systems shall be analyzed by the use of a 10-year storm to verify that stormwater will be contained within the pipe or system. c. If existing natural receiving channels or previously constructed man-made channels or pipes are not adequate, the applicant shall: (1) Improve the channels to a condition where a 10-year storm will not overtop the banks and a two-year storm will not cause erosion to the channel, the bed, or the banks; (2) Improve the pipe or pipe system to a condition where the 10-year storm is contained within the appurtenances; (3) Develop a site design that will not cause the pre -development peak runoff rate from a two-year storm to increase when runoff outfalls into a natural channel or will not cause the pre -development peak runoff rate from a 10-year storm to increase when runoff outfalls into a man-made channel; or (4) Provide a combination of channel improvement, stormwater detention or other measures which is satisfactory to the VESCP authority to prevent downstream erosion. d. The applicant shall provide evidence of permission to make the improvements. e. All hydrologic analyses shall be based on the existing watershed characteristics and the ultimate development condition of the subject project. f. If the applicant chooses an option that includes stormwater detention, he shall obtain approval from the VESCP of a plan for maintenance of the detention facilities. The plan shall set forth the maintenance requirements of the facility and the person responsible for performing the maintenance. g. Outfall from a detention facility shall be discharged to a receiving channel, and energy dissipators shall be placed at the outfall of all detention facilities as necessary to provide a stabilized transition from the facility to the receiving channel. h. All on -site channels must be verified to be adequate. i. Increased volumes of sheet flows that may cause erosion or sedimentation on adjacent property shall be diverted to a stable outlet, adequate channel, pipe or pipe system, or to a detention facility. j. In applying these stormwater management criteria, individual lots or parcels in a residential, commercial or industrial development shall not be considered to be separate development projects. Instead, the development, as a whole, shall be considered to be a single development project. Hydrologic parameters that reflect the ultimate development condition shall be used in all engineering calculations. k. All measures used to protect properties and waterways shall be employed in a manner which minimizes impacts on the physical, chemical and biological integrity of rivers, streams and other waters of the state. I. Any plan approved prior to July 1, 2014, that provides for stormwater management that addresses any flow rate capacity and velocity requirements for natural or man-made channels shall satisfy the flow rate capacity and velocity requirements for natural or man-made channels if the practices are designed to (i) detain the water quality volume and to release it over 48 hours; (ii) detain and release over a 24-hour period the expected rainfall resulting from the one year, 24-hour storm; and (iii) reduce the allowable peak flow rate resulting from the 1.5, 2, and 10-year, 24-hour storms to a level that is less than or equal to the peak flow rate from the site assuming it was in a good forested condition, achieved through multiplication of the forested peak flow rate by a reduction factor that is equal to the runoff volume from the site when it was in a good forested condition divided by the runoff volume from the site in its proposed condition, and shall be exempt from any flow rate capacity and velocity requirements for natural or man-made channels as defined in any regulations promulgated pursuant to § 62.1-44.15:54 or 62.1-44.15:65 of the Act. m. For plans approved on and after July 1, 2014, the flow rate capacity and velocity requirements of § 62.1-44.15:52 A of the Act and this subsection shall be satisfied by compliance with water quantity requirements in the Stormwater Management Act (§ 62.1-44.15:24 et seq. of the Code of Virginia) and attendant regulations, unless such land -disturbing activities i are in accordance with provisions for time 9 9 () limits on applicability of approved design criteria in 9VAC25-870-47 or randfatherin in 9VAC25-870-48 of PP Y PP 9 9 9 the Virginia Stormwater Management Program (VSMP) Regulation, in which case the flow rate capacity and velocity requirements of § 62.1-44.15:52 A of the Act shall apply, or (ii) are exempt pursuant to § 62.1-44.15:34 C 7 of the Act. n. Compliance with the water quantity minimum standards set out in 9VAC25-870-66 of the Virginia Stormwater Management Program (VSMP) Regulation shall be deemed to satisfy the requirements of this subdivision 19. NOTE: SEDIMENT BASIN TO REMAIN IN PLACE UNTIL SITE IS COMPLETED AND STABILIZED. AFTER APPROVAL FROM COUNTY E&SC ADMINISTRATOR, SEDIMENT BASIN TO BE CONVERTED INTO DRY POND. OWNER WILL BE RESPONSIBLE FOR LONG TERM MAINTENANCE REQUIREMENTS OF THE BASIN. TRASH AND SEDIMENT BUILDUP WILL NEED TO BE REMOVED. VEGETATION WILL NEED TO BE TRIMMED PERIODICALLY. MAINTAIN AT LEAST 18" OF COVER OVER CULVERT 42"x16" DEWATERING ORIFICE = 6" ANTI -VORTEX FLEXIBLE TUBING = 8" TRASH RACK SEAL WITH RUBBER GASKET 12" ORIFICE TO BE DRILLED AND SEDIMENT TO BE CLEANED OUT WHEN CONVERTING TO DRY POND (INV AT 490) % SLOPE MIN- 4'x4'x15" CONCRETE ANCHOR 30"0 y HDPE 15"0 HOP RISER CULVERT INV IN = 490 INV OUT = 489 3:1 SIDE SLOPES OR NATURAL SLOPE WHERE APPLICABLE COMPACT SOIL TO 95% 4.5'X4.5' ANTI SEEP COLLAR PLACEMENT: 25' FROM RISER TEMPORARY SEDIMENT BASIN / DETENTION POND N.T.S. COMPACTED SOIL EXCAVATED SOIL 24" WIDE x 12" HIGH 24" WIDE x 12" DEEP FLOW DIVERSION NTS PROPOSED DRIVE SECTION NTS [1AJ11 AlilillrbAlt., UUMI'AUI ZUb-U"UL IV 6" OF #57 STONE 95% PROCTOR DENSITY i' MAX EXCAVATE 4" X 4" TRENCH UPSLOPE OF STAKELINE. ATTACH FENCE MATERIAL AND EXTEND INTO AND ALONG BOTTOM OF TRENCH. BACKFILL AND COMPACT EXCAVATED SOIL. FLOW SIL T FENCE SHEET FLOW PROTECTION NTS TYPICAL TREATMENT - I (SOIL STABILIZATION BLANKET INSTALLATION CRITERIA 12"MAX. 4:1 OR FLATTER �I 1. 6"MAX. STEEPER THAN 4:1 LAP JOINT 2" MIN. I (JUTE MESH ONLY) II I I III I II Of ANCHOR SLOT I EDGE AND END JOINTS TO BE 5 wx. a:i as anrrtn ' I SNUGLY JUNCTION SLOT s Moc s1�ER TIM1N h1 I I i i ABUTTED CHECK SLOT i (JUTE MESH WILL HAVE TERMINAL FOLD I III II STAPLED LAP TAMP FIRMLY ' I I I JOINT IN *CHECK SLOT I ' ' LIEU OF EDGE ANCHOR SLOT ' JOINT) 2' 6" 12" i W. � "" i PLAN VIEW STAPLING DIAGRAM �1" TO 2" * CHECK SLOTS AT MIN. TAMP FIRMLY 50' C-C INTERVALS; -CHECK SLOT 6" TO IN. NOT REQ'D. WITH ALL 2" "COMBINATION" BLANKETS 6" 012" STAPLE FORMED FROM NO. 11 STEEL WIRE. 8" STAPLE MIN. LENGTH FOR SANDY SOIL. 6" STAPLE MIN. LENGTH FOR OTHER SOIL. NOTES JUNCTION SLOT TERMINAL FOLD APPROXIMATELY 200 1~� TAMP FIRMLY ►{ TAMP FIRMLY STAPLES REQUIRED PER 100 SO. YDS. OF 2" 2- MATERIAL ROL. 6" TO 12" ANCHOR SLOTS, T i JUNCTION SLOTS & CHECK SLOTS TO BE Source: VDOT Road and and Rye StandardeStandarde Ptate 3.36-2 BURIED 6" TO 12". DRY POND/SEDIMENT BASIN TOP OF DAM = 498.0 DESIGN HIGH WATER = 496.0 EMERGENCY SPILLWAY CREST = 495.7 PRINCIPAL SPILLWAY CREST = 494.7 DEWATERING ORIFICE INVERT = 493.4 CLEANOUT ELEVATION (SB) = 492.7 BOTTOM (DRY POND/SB) = 490.0 (1) ANTI SEEP COLLARS 4.5'x4.5' EARTHEN DAM NOTES: 1) TO COMPLY WITH VSMH. 2) CUT OFF TRENCH FOR ENTIRE LENGTH OF DAM AT CENTERLINE TO BE EXCAVATED 4' WIDE AND 2' DEEP INTO IMPERVIOUS MATERIAL. SIDE SLOPES TO BE 1:1, AND COMPACTED. 3) DAM COMPACTION TO BE 95% OF MAXIMUM DRY DENSITY. p3.1 SLOPE- _ TYPICAL DITCH SECTION NTS La 0% SECTION A -A FILTER CLOTH" KEY IN 6"-9" RECOMMENDED FOR ENTIRE PERIMETER PIPE OUTLET CONDITIONS GRAVEL NTS x EDGE OF PAVEMENT �10' MIN A 0 0 0 0 10' MIN 0 0 0 0 0 0 SANDBAGS OR STAPLES 10 MIL PLASTIC SANDBAGS LINING OR STAPLES 1:1 SIDE 1 SLOPE (TYP)___1 3' SECTION A -A I� A PLAN NOTES: 1. ACTUAL LOCATION DETERMINED IN FIELD 2. THE CONCRETE WASHOUT STRUCTURES SHALL BE MAINTAINED WHEN THE LIQUID AND/OR SOLID REACHES 75% OF THE STRUCTURES CAPACITY. 3. CONCRETE WASHOUT STRUCTURE NEEDS TO BE CLEARLY MARKED WITH SIGN WASHOUT STRUCTURE MINIMUM REQUIREMENTS FOR STABILIZED CONSTRUCTION ENTRANCE # 1 COARSE PLAN 6" MINIMUM DEPTH *1 COARSE AGGREGATE. WITH MINIMUM 10' CLOSEST TO ROADWAY CAPPED WITH V' MINIMUM DEPTH #Be OR #78 AGGREGATE. AS DIRECTED BY THE ENGINEER. 'E OUTLET TO FLAT EA WITH NO FINED CHANNEL LTOE OF FILL *DISTANCE IS 6' MIN. IF FLOW IS TOWARD EMBANKMENT GRAVEL CULVERT INLET PROTECTION XA-CIP NTS FLOW- 2.5' EXCAVATE FOR SEDIMENT TRAPPING ILTER LASS I VDOT #3, #357, #5, #56 OR #57 COARSE FABRIC RIPRAP AGGREGATE TO REPLACE SILT FENCE IN "HORSESHOE" WHEN HIGH VELOCITY OF FLOW IS EXPECTED CULVERT INLET PROTECTION STONE COMBINA TION NTS EXISTING PAVEMENT S"-10" M4#CEOTEXTILE 3- *1 COARSE MaREC. EXISTING PAVEMENT SUBGRADE STABILIZATION FABRIC PROFILE ^y GROOVING IS CUTTING FURROWS ALONG THE CONTOUR OF A SLOPE. IRREGULARITIES IN THE SOIL SURFACE CATCH RAINWATER AND PROVIDE SOME COVERAGE OF LINE, FERTILIZER, AND SEED. GROOVING SLOPES NTS Target and Neighboring Parcel Information Tax Map# ParcellD Owner Zoning District Use 129-5 12900-00-00-00500 TROXELL ASHLEY ANNE• BROC ATROXELL• WILLIAM FRED HESS & HEATHER F HESS Rural Areas Misc. Improvements p 121-70D 12100-00-00-070D0 SWANBERG, GREGORY J OR JOAN M Rural Areas Single Family 121-70E 12100-00-00-070E0 TROXELL ASHLEY ANNE BROC ATROXELL WILLIAM FRED HESS & HEATHER F HESS Rural Areas Single Fa mil g Y 121-70A 12100-00-00-07OA0 SWAN BERG, GREGORY JUDE &JOAN MARIE SWANBERG Rural Areas Vacant Residential Land 129-4 12900-00-00-00400 WOODSTOCK FARM LLC Rural Areas Single Family 129-4B 12900-00-00-00480 P&V COLEMAN FAMILY PARTNERSHIP LLLP Rural Areas Vacant Residential Land 130-5B1 13000-00-00-00581 BRAYMAN, BRUCE & JILL MATSON Rural Areas Misc. Improvements 130-4 13000-00-00-00400 PARANZINO, DENNIS H OR HELEN C Rural Areas Single Family 130-1 13000-00-00-00100 ITOTIER CREEK FARM LLC Rural Areas Single Family 122-5A 12200-00-00-005A0 ISTEPHEN R HAECKEL I Rural Areas I Vacant Residential Land Date: 3/21 /21 Scale: AS NOTED Designed by: NHK Drawn by: BWK Checked by: NHK C o iD aE 0 o v � �r X N pDID 00 C N W J v1 C ll IL Ln W tsi ic'^v N m C-) ; y � rY1 U 1v g IE0 m =a@J C N cam W O C - `mcL E W v12a W Revision Dates VLLI LAJ O J_ to Z � Q O _J J N W J >- LLIJQ � 0 p 0 O ck� J CL () LLI J o > (3) O N J WLLI V) Xmcp0 N Drawing No. 3 of 3 Sheets Job No. 2888