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Home My WebLink AboutWPO201600085 Plan - VSMP Minor Amendment 2 2017-02-07I LIMITS OF DISTURBANCE I • I ! 20 LF OF 15" RCP CULVERT (TEMPORARY)); INV IN: 487.75; INV OUT: 487.55; MIN. 12" OF COVER. TO */ DIVERT CLEAN UPSTREAM RUNOFF AROUND LIMITS. nn DD I EXTEND EXISTING RIPRAP CHANNEL DD TO TOP OF SLOPE RR APPROXIMATE LOCATION OF EXISTING RIPRAP CHANNEL; NOT FIELD SURVEYED J _ i EROSION & SEDIMENT CONTROL LEGEND No. TITLE KEY SYMBOL 3.01 SAFETY FENCE SAF 3.02 TEMPORARY STONE CONSTRUCTION ENTRANCE O 1. REFER TO SHEETS 05-A AND 05-B FOR EROSION & SEDIMENT CONTROL 3.05 SILT FENCE SF -_ 3.07 STORM DRAIN INLET PROTECTION {P 3.09 TEMPORARY DIVERSION DIKE z >- 3.19 RIPRAP cw G 0 3.13 SEDIMENT TRAP 0 i 3.29 SURFACE ROUGHENING SR SR 3.31 TEMPORARY SEEDING TS TS 3.39 DUST CONTROL DC DC [ % L 1190 - �a r ____. /T i H OF 7,7 e, . CHRISTOPHER E. SONNE �'-A Lic. No. 02/0621 .26' l -177 ONAL �� z Q a NOTES: CL • O 1. REFER TO SHEETS 05-A AND 05-B FOR EROSION & SEDIMENT CONTROL -_ __ O NOTES AND DETAILS AND SHEET 05-C FOR EROSION & SEDIMENT CONTROL F— z NARRATIVE. *NOTE SEQUENCE OF CONSTRUCTION* cw G 0 2. EROSION MEASURES SHALL BE INSTALL AS THE FIRST STEP IN LAND 0 U) zD Q O DISTURBANCE AND REMAIN IN PLACE UNTIL ALL UPSTREAM AREAS HAVE BEEN z = ( O cc: C/)> p PERMANENTLY STABILIZED OR ARE REPLACED BY OTHER MEASURES. w z I• R i 3. EROSION AND SEDIMENT CONTROL MINIMUM STANDARDS (MS -1 THROUGH 2E Q • I REVISIONS MS -19) SHALL BE FOLLOWED AT ALL TIMES. SIP c rV 4. UTILIZE SURFACE ROUGHENING ON ALL GRADED SLOPES BY CREATING I I HORIZONTAL DEPRESSIONS IN THE SOIL THROUGH THE USE OF EQUIPMENT SR WITH TRACKS OR OTHER SUITABLE METHOD. • 5. ALL CONSTRUCTION TRAFFIC SHALL ENTER THE SITE USING THE APPROVED j CONSTRUCTION ENTRANCE. 6. ALL DEMOLITION ITEMS TO BE REMOVED FROM SITE AND TO BE PROPERLY • DISPOSED OF PER COUNTY, STATE AND FEDERAL REGULATIONS. 7. INSTALL SILT FENCE ALONG CONSISTENT ELEVATION WHEREVER POSSIBLE USING GPS EQUIPMENT. AT THE END OF ALL RUNS, HOOK THE SILT FENCE o ' ,{ i PERPENDICULAR TO THE RUN AND CONTINUE UPHILL FOR AT LEAST ONE • VERTICAL FOOT. MONITOR SILT FENCE FOR FAILURE AT LOW POINTS AND FOR • i RUNOFF FLOWING AROUND THE ENDS. IF FENCE FAILS, ADDITIONAL ROWS OF FENCING SHALL BE INSTALLED PARALLEL TO AND IN ONE FOOT INCREMENTS DD BEHIND THE PRIMARY SECTION AS REQUIRED. • 8. THE CONTRACTOR SHALL IMPLEMENT THE FOLLOWING POLLUTION PREVENTION r PRACTICES THROUGHOUT CONSTRUCTION PER THE ALBEMARLE COUNTY CODE: j A. WASHOUT CONCRETE MIXING CONTAINERS AND DISPOSE OF IN I ACCORDANCE WITH VIRGINIA DEPT. OF ENVIRONMENTAL QUALITY REGULATIONS. ! B. TRASH CONTAINERS SHALL BE COVERED WHEN NOT IN USE AND THE CONTRACTOR SHALL PREVENT TRASH FROM ENTERING STORMWATER • FACILITIES AND CONVEYANCES. 9. PORTABLE TOILET FACILITIES SHALL BE LOCATED A MINIMUM OF 50 FEET FROM l STORM INLETS AND CONVEYANCES. I ! 10. LIQUID OR FLOWABLE MATERIAL SHALL BE DISPOSED OF W ACCORDANCE THE i ! VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY REGULATIONS, AND ALL • j WASHOUT SHALL BE CONTAINED AND DISPOSED OF ACCORDINGLY. i j I • j I � � f j { ' - d i V ` [ % L 1190 - �a r ____. /T i H OF 7,7 e, . CHRISTOPHER E. SONNE �'-A Lic. No. 02/0621 .26' l -177 ONAL �� z Q CL J O z O F— z cw G 0 w w 0 U) zD Q O z z = ( O cc: C/)> p J > w z wH 0T f.� w W Q -j 2E Q 0 L coI REVISIONS 1/26/2017 COUNTY COMIMENTS,' SIP c rV - " — — -- — — — — __ - - --- DESIGNED BY: - f,' - - - - - - - -- — -- -- -- r r i - _ vo ___- _.- --- - _-------'- -- ------ - ----- _ r ' DRAWN BY: lr - _-- - -- i A1JH 7 CHECKED BY: - - , \ _ - _ GRAPHIC SCALE L.BL SCALE: 1 ":= 20' DATE: 12/19/2016 A� PROJECT NUMBER: C1681 OC -01 O A (IN FEET) 1 inch= 20 ft. U 48O- , A U o ADJUST CONSTRUCTION ENTRANCE LOCATION FOLLOWING REMOVAL OF SEDIMENT TRAP z In rr n z 0 �� x z w �� 8 �� 0N �� k �� ^�� K 8 .� — �� z _ o �� v�� 0_-_� ---� _ �� _ K � U — �� U �� _ �� NN �� Un �� w �� ~ � NN �� -� UJ _J rr �� ' 2�� 0 _ �� m -j < REVISIONS 1/28/2017 COUNTY COMMENTS ' ~ / ``` -----__ ___--------- \ _-~' ---------__ 480DESIGNED BY:CES-- --' ^'-- ---------- ------ � -~~- ~'~- _----- -------- ------------------ �-------_ `-~-- �~�. /'DRAWN BY: AJH`` / \ ``' ---------------------------~ _------ _~ --T_ ' / ,'--- -----__ --------_-___-------------------------------- -------- �`` ` `` � \ -----__ ___------ ,~ ~- . \ ` � ----___ ----_--_--_----�---------------------------------- ^. \ \ . `` ` / ' CHECKED BY: LBL `- --_ --------- _- -- -- ` ` `` -~` ---- _------------. ` ` i ~` '- ___________-__-___--_----------- `- `_ ------_- __------------_--~- __ -- -- -- _----`\ `` `. �^. ~`` �`` -----_ -------- __-_--_------. `` \ ------------------------------------------------ ` ` `` - GRAPHIC SCALE |12/119/2016 ' -__---- --_------ � -~~- ~` ``~ `~` `-__----- --------------__-_--_--- _----- ~' '' ` 20 0 m 20 w`' 80 -- PROJECT NUMBER: -_ _--�---- ___----- _\^--- ~`. ``~ `. --------------__-__ _---- _--- ' ` --------- _--------- ------ _------ \ _-----. -~� �`. ---------------------- -------- _----- _-~^ ` ----- -- -- ---- -- ` . -------- -------- -- _- ` ` �� ' - (IN FEET) ' ' ` ------ --_---- _---- _---------- \ __----`^� `. -----------------_-_------- __--- 1 inch= 20% 04-B MINIMUM STANDARDS A VIRGINIA EROSION AND SEDIMENT CONTROL PLAN MUST BE CONSISTENT WITH THE FOLLOWING CRITERIA, TECHNIQUES AND METHODS: MS -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 APPLIIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS. PERMIANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. MS -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. MS -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. MS -4. SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTfHER 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. MS -5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. MS -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 CAPACIITY 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. MS -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 BIE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. MS -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. MS -9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. MS -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. MS -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. MS 12. WHEN WORK IN ALIVE 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 IBE USED FOR THESE STRUCTURES IF ARMORED BY NONERODIBLE COVER MATERIALS. MS -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 IBE PROVIDED. MS -14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET. MS -15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELW AFTER WORK IN THE WATERCOURSE IS COMPLETED. MS -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 THIROUGH 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. MS -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. MS -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 MEASIURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. MS -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 CHANINELS 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 FOLLOWIING MANNER: (1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE AREA T0, THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE HUNDRED TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OF THE PROJECT IIN 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 TEN-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 iA TEN-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 TEN-YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO-YEAR STORM WILL NOT CAUSE EROSION TO THE CHANNEL, THE BED, OR THE BANKS; OR (2) IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE TEN-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 TEN-YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL; OR (4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT, STORMWATER DETENTIION 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 FORTIH 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. L. ANY PLAN APPROVED PRIOR TO JULY 1, 2014, THAT PROVIDES FOR STORMWATER MANAGEMENT THAT ADDRESSES ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS SHALL SATISFY THE FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS IF THE PRACTICES ARE DESIGNED TO (1) DETAIN THE WATER QUALITY VOLUME AND TO RELEASE IT OVER 48 HOURS; (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 FROMI THE 1.5, 2, AND 10 -YEAR, 24-HOUR STORMS TO A LEVEL THAT IS LESS THAN OR EQUAL TO THE PEAK FLOW RATE FROM THE SITE ASSUMING IT WAS IN A GOOD FORESTED CONDITION, ACHIEVED THROUGH MULTIPLICATION OF THE FORESTED PEAK FLOW RATE BY A REDUCTION FACTOR THAT IS EQUAL TO THE RUNOFF VOLUME FROM THE SITE WHEN IT WAS IN A GOOD FORESTED CONDITION DIVIDED BY THE RUNOFF VOLUME FROM THE SITE IN ITS PROPOSED CONDITION, AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL, OR MAN-MADE CHANNELS AS DEFINED IN ANY REGULATIONS PROMULGATED PURSUANT TO § 62.1-44.15:54 OR 62.1-44.15:65 OF THE ACT. M. FOR PLANS APPROVED ON AND AFTER JULY 1, 2014, THE FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS OF § 62.1-44.15:52 A OF THE ACT AND THIS SUBSECTION SHALL BE SATISFIED BY COMPLIANCE WITH WATER QUANTITY REQUIREMENTS IN THE STORMWATER MANAGEMENT ACT (§ 62.1-44.15:24 ET SEQ. OF THE CODE OF VIRGINIA) AND ATTENDANT REGULATIONS, UNLESS SUCH LAND -DISTURBING ACTIVITIES ARE IN ACCORDANCE WITH 9VAC25-870-48 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) REGULATIONS. N. COMPLIANCE WITH THE WATER QUANTITY MINIMUM STANDARDS SET OUT IN QIWAC25-870-66 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) REGULATIONS SHALL BE DEEMED TO SATISFY THE REQUIREMENTS OF SUBDIVISION 19 OF THIS SUBSECTION. GENERAL EROSION AND SEDIMENT CONTROL NOTES ES -1 UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK (VESCH) AND VIRGINIA REGULATIONS 4VAC50-30 EROSION AND SEDIMENT CONTROL REGULATIONS. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES -2 VDOT 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 ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING, GRADING OR LAND -DISTURBING AND SEQUENCE OF CONSTRUCTION APPROVED. ES -4 A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES -5 PRIOR TO LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS OR OFF-SITE FILL ACTIVITIES, THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND FOR APPROVAL BY VDOT. ES -6 THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY VDOT. ES -7 SITE GRADING IS TO DRAIN TO THE PERIMETER CONTROLS AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING CONSTRUCTION, UNTIL FINAL STABILIZATION IS ACHIEVED. 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 (AT LEAST DAILY) 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. EROSION AND SEDIMENT CONTROL, AND STORMWATER NOTES: 1. THE VESCP 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 FINAL INSPECTION. 2. THE FULL EROSION AND SEDIMENT CONTROL NARRATIVE AND STORMWATER MANAGEMENT REPORT, ALONG WITH THE SUPPORTING APPENDICES, SHALL BE KEPT ONSITE AT ALL TIMES DURING CONSTRUCTION. IT IS THE CONTRACTOR'S RESPONSIBILITY TO OBTAIN THE APPROVED VERSION OF THIS DOCUMENT FROM THE OWNER OR ENGINEER PRIOR TO BEGINNING CONSTRUCTION. 3. RETAIN A COPY OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, LATEST EDITION ON SITE AND ADHERE TO THE STANDARDS LISTED AT ALL TIMES. 4. PRIOR TO ANY LAND DISTURBING ACTIVITY, CONTRACTOR SHALL PROVIDE THE NAME, CERTIFICATION INFORMATION, AND CONTACT INFORMATION OF THE DESIGNATED RESPONSIBLE LAND DISTURBER (RLD) TO THE APPROPRIATE AUTHORITY. 5. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28 6. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 7. BORROW, FILL, OR WASTE ACTIVITIES INVOLVING INDUSTRIAL-TYP POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF T OOAM TO 9: OOPM. 8. BORROW, FILL, OR WASTE ACTIV17Y SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, IN ORDER TO MINIMIZE HAZARD TO PERSONI, PHYSICAL DAMAGE TO ADJACENT LAND, AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINIKING, OR COLLAPSE. 70' MIN. FILTERA " EXISTING I CLOTH 6MIN. GROUND SIDE ELEVATION VDOT #1 COARSE AGGREGATE * MUST EXTEND FULL WIDTH OFINGRESS AND EGRESS OPERATION FILTER CLOTH 70' MIN. WASHRACK B] %(OPTIONAL) B POSITIVE DRAINAGE ,\-TO SEDIMENT TRAPPING DEVICE PLAN VIEW 12' MIN.* SECTION A -A 5:1 EXISTING PAVEMENT MOUNTABLE BERM (OPTIONAL) 10' MIN. EXISTING PAVEMENT 10' MIN. i_ 3" MIN. 3" MIN. CONSTRUCTION ENTRANCE WITH OPTIONAL WASHRACK 3.02 NOT TO SCALE FI L 1.` 2"x4" WOOD FRAME PERSPECTIVE VIEWS DROP INLET WITH GRATE FRAME GATHER EXCESS AT CORNERS STAKE FABRIC -\Cl �rm fi - 777 SEE DETAIL A ELEVATION OF STAKE AND FABRIC ORIENTATION DETAIL A SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE WHERE THE INLET DRAINS A RELATIVELY FLAT AREA (SLOPE NO GREATER THAN 57.) WHERE THE INLET SHEET OR OVERLAND FLOWS (NOT EXCEEDING 1 C.F.S.) ARE TYPICAL. THE METHOD SHALL NOT APPLY TO INLETS RECEIVING CONCENTRATED FLOWS, SUCH AS IN STREET OR HIGHWAY MEDIANS. SILT FENCE DROP INLET PROTECTION DETAIL 3.07 NOT TO SCALE 1 SET POSTS AND EXCAVATE A 2. STAPLE WIRE FENCING TO THE POSTS. 4" X 4" TRENCH UPSLOPE ALONG THE LINE OF POSTS. 4" \ FLOW _ \ - 4>, 3. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) ��- WI R E EXTENSION OF FABRIC AND WIRE INTO TRENCH NOTES: • WOODEN STAKES TO BE A MINIMUM OF 5' LONG AND HAVE A MINIMUM DIAMETER OF 2" WHEN OAK AND 4" WHEN PINE. • SILT FENCE FABRIC SHALL MEET ALL REQUIREMENTS OF TABLE 3.05-13 OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. • SILT FENCE SHALL BE A MINIMUM OF 24" ABOVE THE GROUND AND SHALL NOT EXCEED 34" ABOVE GROUND. SILT FENCE INSTALLATION DETAILS WITH WIRE BACKING NOT TO SCALE ,Z,TH 0 HRISTOPHER E. SONNE ". Lie. No. 020621 o�1 %26177�v, ONAL Cn J Q W D 06 (A W H Z J H Z O W U C/) H � W 0 � 2 o p W C/) J W 06 z LL O Q U) U O 0 w Cn REVISIONS 1/26/2017 COUNTY COMMENTS DESIGNED BY: SES _ DRAWN BY: A1JH CHECKED BY: LBL SCALE: NO SCALE z (3 fz Z) L) W J LLJ m J Q DATE: 12/1'9/2016 PROJECT NUMBER: Cl 681 OC -01 05-A WIRE SCREEN -CONCRETE BLOCK SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE WHERE HEAVY FLOWS ARE EXPECTED AND WHERE AN OVERFLOW CAPACITY IS NECESSARY TO PREVENT EXCESSIVE PONDING AROUND THE STRUCTURE. * GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE. BLOCK AND GRAVEL DROP INLET PROTECTION NOT TO SCALE 67 CY/AC DRY STORAGE 67 CY/AC WET _J><�_ STORAGE SEDIMENT CLEANOUT POINT (WET STORAGE REDUCED TO 34 CY/AC) 9 NOTE: REFER TO DETAIL BELOW (3.113A) FOR ADDITIONAL INFORMATION MINIMUM STORAGE VOLUME AND SEDIMENT STORAGE NOT TO SCALE SEDIMENTTRAP 1 ELEV. A 478.5' ELEV. B 477.0' ELEV. C 474.5' ELEV. D 479.5' L 10.0' XX 103 CY Min YY 1103 CY Min REQUIRED SIZE OF SEDIMENT TRAP 1 MAX. DRAINAGE AREA: 1.54 ACRES WET VOL. REQ'D: 103 C.Y. DRY VOL. REQ'D: 103 C.Y. TOTAL VOL. REQ'D: 1 2061 C.Y. ACTUAL VOLUME OF SEDIMENTTRAP 1 ELEVATION AREA (S.F.) VOL. (C.F.) VOL (C.Y.) NOTE 479.5 3093 10551 391 TOP BIER M 478.5 2652 7679 284 TOP D IRY EL. 478.0 2453 6403 237 -KENTUCKY 31 FESCUE 477.0 2076 4138 153 TOP WET EL. 476.0 1728 2236 83 PERIODS; ADD 10-20 LBS./ACRE IN MIXES. 475.0 1409 668 25 J 474.5 1261 0 0 1 BOTTO M EX. GRADE SEE CHARTS FOR REQUIRED STORAGE CAPACITIES 3.0' MIN. 2.0' 1.0' MIN. ELEV. D \ � o ELEV. A DRY VOLUME 67 CY PER AC. \ DRY VOLUME (YY C.Y.) N 1.5' COARSE AGGREGATE** ELEV. B WET VOLUME 67 CY PER AC. ELEV. B ORIGINAL GROUND WET VOLUME ,� 2.5' (XX C.Y.) CLASS I RIPRAP ELEV. C NOTE: CLEANOUT AT ELEV. E CROSS SECTION OF OUTLET CLASS I RIPRAP FILTER CLOTH COARSE AGGREGATE** (L) = LENGTH (IN FEET) 6 x DRAINAGE AREA IN ACRES DIVERSION DIKE (BERM) x ?zzl,zz EXCAVATED AREA ** COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5. SOURCE. VA. DSWC, PLATE 3.13-2 OUTLET (PERSPECTIVE VIEW) TEMPORARY SEDIMENT TRAP 3.136 NOT TO SCALE PERMANENT SEEDING Ps ORGANIC MULCH MI ATERIALS AND APPLICATION RATES TABLE 3.32-D SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA MINIMUM CARE LAWN TOTAL LBS. PER ACRE -COMMERCIAL OR RESIDENTIAL 175-200 LBS. -KENTUCKY 31 OR TURF -TYPE TALL FESCUE 95-100 LBS. -IMPROVED PERENNIAL RYEGRASS 0-5% -KENTUCKY BLUEGRASS 0-5% HIGH -MAINTENANCE LAWN 200-250 LBS. -KENTUCKY 31 OR TURF -TYPE TALL FESCUE 100% GENERAL SLOPE (3:1 OR LESS) ANNUAL RYE -KENTUCKY 31 FESCUE 128 LBS. -RED TOP GRASS 2 LBS. -SEASONAL NURSE CROP *20 LBS. VETCH, INCREASE RATE TO 30 150 LBS. LOW -MAINTENANCE SLOPE (STEEPER THAN 3:1) ORGANIC MULCH MI ATERIALS AND APPLICATION RATES -KENTUCKY 31 FESCUE 108 LBS. -RED TOP GRASS 2 LBS. -SEASONAL NURSE CROP *20 LBS. -CROWN VETCH **20 LBS. 1, - 2 tons 150 LBS. * USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: FEBRUARY 16TH THROUGH APRIL ANNUAL RYE MAY 1ST THROUGH AUGUST 15TH FOXTAIL MILLET AUGUST 16TH THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15TH WINTER RYE ** SUBSTITUTE SERICEA LESPEDEZA FOR CROWN VETCH EAST OF FARMVILLE, VA. (MAY THROUGH SEPTEMBER USE HULLED SERICEA, ALL OTHER PERIODS USE UNHULLED SERICEA.) IF FLATPEA IS USED IN LIEU OF CROWN VETCH, INCREASE RATE TO 30 LBS./ACRE. ALL LEGUME SEED MUST BE PROPERLY INOCULATED. WEEPING LOVEGRASS MAY BE ADDED TO ANY SLOPE OR LOW -MAINTENANCE MIX DURING WARMER SEEDING PERIODS; ADD 10-20 LBS./ACRE IN MIXES. z NOTE: CONTRACTOR TO SUBMIT SEED MIX FOR REVIEW PERMANENT SEEDING (PIEDMONT VIRGINIA) NOT TO SCALE COMPACTED SOIL FLOW NOTE: IMMEDIATELY APPLY SEEDING ONCE CONSTRUCTED TEMPORARY DIVERSION DIKE NOT TO SCALE TEMPORARY SEEDING Ts TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS" PLANTING DATES SPECIES SEPT. 1 -FEB. 15 50/50 MIX OF ANNUAL RYEGRASS (LOLIUM MULTI-FLORUM) & CEREAL (WINTER) RYE (SECALE CEREALE) FEB. 16 -APR. 30 ANNUAL RYEGRASS (LOLIUM MULTI-FLORUM� MAY 1 -AUG. 31 GERMAN MILLET (SETARIA ITALICA), TEMPORARY SEEDING 3.31 NOT TO SCALE RATE (LBS./ACRE). 50-100 60-100 50-100 TOPSOILING To FIELD EXPLORATION OF THE SITE SHALL BE MADE TO DETERMINE IF THERE IS SUFFICIENT SURFACE SOIL OF GOOD QUALITY TO JUSTIFY STRIPPING. TOPSOIL SHALL BE FRIABLE AND LOAMY (LOAM, SANDY LOAM, SILT LOAM, SANDY CLAY LOAM, CLAY LOAM). IT SHALL BE FREE OF DEBRIS, TRASH, STUMPS, ROCKS, ROOTS, AND NOXIOUS WEEDS, AND SHALL GIVE EVIDENCE OF BEING ABLE TO SUPPORT HEALTHY VEGETATION. IT SHALL CONTAIN NO SUBSTANCE THAT IS POTENTIALLY TOXIC TO PLANT GROWTH. ALL TOPSOIL SHALL BE TESTED BY A RECOGNIZED LABORATORY FOR THE FOLLOWING CRITERIA: • ORGANIC MATTER CONTENT SHALL BE NOT LESS THAN 1.5% BY WEIGHT. • PH RANGE SHALL BE FROM 6.0-7.5. IF PH IS LESS THAN 6.0, LIME SHALL BE ADDED IN ACCORDANCE WITH SOIL TEST RESULTS OR IN ACCORDANCE WITH THE RECOMMENDATIONS OF THE VEGETATIVE ESTABLISHMENT PRACTICE BEING USED. • SOLUBLE SALTS SHALL NOT EXCEED 500 PPM. IF ADDITIONAL OFF-SITE TOPSOIL IS NEEDED, IT MUST MEET THE STANDARDS STATED ABOVE. STRIPPING: TOPSOIL OPERATIONS SHOULD NOT BE PERFORMED WHEN THE SOIL IS WET OR FROZEN. STRIPPING SHALL BE CONFINED TO THE IMMEDIATE CONSTRUCTION AREA. A 4 -TO 6 -INCH STRIPPING DEPTH IS COMMON, BUT DEPTH MAY VARY DEPENDING ON THE PARTICULAR SOIL. ALL PERIMETER DIKES, BASINS, AND OTHER SEDIMENT CONTROLS SHALL BE IN PLACE PRIOR TO STRIPPING. STOCKPILING: TOPSOIL SHALL BE STOCKPILED IN SUCH A MANNER THAT NATURAL DRAINAGE IS NOT OBSTRUCTED AND NO OFF-SITE SEDIMENT DAMAGE SHALL RESULT. STABILIZE OR PROTECT STOCKPILES IN ACCORDANCE WITH MS #2. SIDE SLOPES OF THE STOCKPILE SHALL NOT EXCEED 2:1. PERIMETER CONTROLS MUST BE PLACED AROUND THE STOCKPILE IMMEDIATELY; SEEDING OF STOCKPILES SHALL BE COMPLETED WITHIN 7 DAYS OF THE FORMATION OF THE STOCKPILE, IN ACCORDANCE WITH STD. & SPEC. 3.31, TEMPORARY SEEDING IF IT IS TO REMAIN DORMANT FOR LONGER THAN 30 DAYS (REFER TO MS #1 AND MS #2). LIMING: WHERE THE PH OF THE SUBSOIL IS 6.0 OR LESS, OR THE SOIL IS COMPOSED OF HEAVY CLAYS, AGRICULTURAL LIMESTONE SHALL BE SPREAD IN ACCORDANCE WITH THE SOIL TEST OR THE VEGETATIVE ESTABLISHMENT PRACTICE BEING USED. BONDING: AFTER THE AREAS TO BE TOPSOILED HAVE BEEN BROUGHT TO GRADE, AND IMMEDIATELY PRIOR TO DUMPING AND SPREADING THE TOPSOIL, THE SUBGRADE SHALL BE LOOSENED BY DISCING OR SCARIFYING TO A DEPTH OF AT LEAST 2 INCHES TO ENSURE BONDING OF THE TOPSOIL AND SUBSOIL. APPLYING TOPSOIL: TOPSOIL SHALL NOT BE PLACED WHILE IN A FROZEN OR MUDDY CONDITION, WHEN TOPSOIL OR SUBGRADE IS EXCESSIVELY WET, OR IN A CONDITION THAT MAY OTHERWISE BE DETRIMENTAL TO PROPER GRADING OR PROPOSED SODDING OR SEEDING. THE TOPSOIL SHALL BE UNIFORMLY DISTRIBUTED TO A MINIMUM COMPACTED DEPTH OF 2 INCHES ON 3:1 OR STEEPER SLOPES AND 4 INCHES ON FLATTER SLOPES. ANY IRREGULARITIES IN THE SURFACE, RESULTING FROM TOPSOILING OR OTHER OPERATIONS, SHALL BE CORRECTED IN ORDER TO PREVENT THE FORMATION OF DEPRESSIONS OR WATER POCKETS. IT IS NECESSARY TO COMPACT THE TOPSOIL ENOUGH TO ENSURE GOOD CONTACT WITH THE UNDERLYING SOIL AND TO OBTAIN A LEVEL SEEDBED FOR THE ESTABLISHMENT OF HIGH MAINTENANCE TURF. HOWEVER, UNDUE COMPACTION IS TO BE AVOIDED AS IT INCREASES RUNOFF VELOCITY AND VOLUME, AND DETERS SEED GERMINATION. SPECIAL CONSIDERATION SHOULD BE GIVEN TO THE TYPES OF EQUIPMENT USED TO PLACE TOPSOIL IN AREAS TO RECEIVE FINE TURF. AVOID UNNECESSARY COMPACTION BY HEAVY MACHINERY WHENEVER POSSIBLE. TOPSOILING 3.30 NOT TO SCALE 5H� SLC WHERE THERE IS A BERM AT THE TOP OF THE SLOPE, BRING THE MATERIAL OVER THE BERM AND ANCHOR IT BEHIND THE BERM. BRING MATERIAL DOWN TO A LEVEL AREA BEFORE TERMINATING THE INSTALLATION. TURN THE END UNDER 4" AND STAPLE AT 12" INTERVALS. ON SHALLOW SLOPES, STRIPS OF NETTING PROTECTIVE COVERINGS MAY BE APPLIED ACROSS THE SLOPE. BERM ON STEEP SLOPES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. yoNaKommm 1, 4'377 12 IN DITCHES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL POSSIBLE. ** TYPICAL INSTALLATION PROCEDURES SHOWN. INSTALL MATTING IN ACCORDANCE WITH MANUFACTURER'S GUIDELINES AND SPECIFICATIONS. SOIL STABILIZATION BLANKET NOT TO SCALE TABLE 3.35-A ORGANIC MULCH MI ATERIALS AND APPLICATION RATES J RATES: Q MULCHES: NOTES: Per Acre Per 1000 sq. ft. Straw or Hay 1, - 2 tons 70 - 90 lbs. Free from weeds and coarse (Minimum 2 matter. Must be anchored. tons for Spread with mulch blower winter cover) W or by hand. Fiber Mulch Minimum 35 lbs. Do not use as mulch for O 1500 lbs. z winter cover or during hot, p W U) J dry periods.* Apply as w 06 slurry. Corn Stalks 4 - 6 tons 185 - 275 lbs. Crit or shredded in 4-6" U O 0 lengths. Air-dried. Do not w Cn use in fine turf areas. Apply with mulch blower or by hand. Wood Chips 4 - 6 tons 185 - 275 lbs. Free of coarse matter. Air- dried. Treat with 12 lbs nitrogen per ton. Do not use in fine turf areas. Apply with mulch blower, chip handler, or by hand. Bark Chips 50 - 70 cu. 1-2 cu, yds. Free of coarse matter. Air - or yds. dried. Do not use in fine Shredded turf areas. Apply with Bark mulch blower, chip handler, or by hand. * When fiber mulch is the only available inulch during periods when straw should be used, apply at a minimum rate of 2000 lbs./ac. or 45 lbs./1000 sq. ft. MULCHING 3.35 NOT TO SCALE ,Z,TH 0 �Af CHRISTOPHER E. SONNE '_" Lie. No. 020621 261-17' ONAL . ��~ La U ? > U Z > i ui 0 � (� v u Z > o o o E 5.E 1 a� ac m x ' N N O Or ♦ (7)N a N U9 �1 a, > 4E >N 43 y 0 +>>mU� Ca °a3 =93 N T M ICT REVISIONS 1/26/2017 COUNTY COMMENTS DESIGNED BY: CES DRAWN BY: AJH CHECKED BY: LBL SCALE: NO SCALE DATE: 12/119/2016 PROJECT NUMBER: C1681 OC -01 z (D >z } F�- 0 J m J Q J Q W D J H Z O W U � F- D W O � z o p W U) J w 06 Z LL o a C/) U O 0 w Cn REVISIONS 1/26/2017 COUNTY COMMENTS DESIGNED BY: CES DRAWN BY: AJH CHECKED BY: LBL SCALE: NO SCALE DATE: 12/119/2016 PROJECT NUMBER: C1681 OC -01 z (D >z } F�- 0 J m J Q n N N EROSION AND SEDIMENT CONTROL NARRATIVE: PROJECT DESCRIPTION THE SOCCER ORGANIZATION CHARLOTTESVILLE AREA SOCA PROPOSES TO CONSTRUCT AN APPROXIMATELY 38,000 SQUARE FOOT FIELDHOUSE ALONG WITH ASSOCIATED PARKING AT THE INTERSECTION OF COLBERT STREET AND BELVEDERE BOULEVARD IN ALBEMARLE COUNTY, VIRGINIA. CONSTRUCTION IS EXPECTED TO BEGIN IN THE SPRING OF 2017 AND BE COMPLETED IN THE SPRING OF 2018. THE PROJECT WILL DISTURB 2.54 ACRES AND IS AN AMENDMENT TO A PREVIOUSLY APPROVED SET OF PLANS "SO(CA FIELDHOUSE" DATED JUNE 2014. THE SITE WAS PREVIOUSLY MASS GRADED AND THEREFORE WILL ONLY REQUIRE MINOR GRADING TO BRING THE PROPOSED FIELDHOUSE AND PARKING LOT TO FINAL GRADE. THE FIELDHOUSE PAD WILL BE CONSTRUCTED FOLLOWING INSTALLATION OF EROSION & SEDIMENT CONTROL MEASURES. ONCE THE FIELD HOUSE PAD IS COMPLETE AND THE PHASE 1 EROSION & SEDIMENT CONTROL MEASURES HAVE BEEN REMOVED, THE PARKING LOT AND ASSOCIATED PEDESTRIAN ACCESS WAYS WILL BE CONSTRUCTED. OTHER SITE WORK ITEMS INCLUDE THE INSTALLATION OF UTILITIES SERVING THE NEW BUILDING, IINCLUDING FIRE AND DOMESTIC WATER, ELECTRICAL, LIGHTING, SANITARY AND STORM SEWER, THE MAJORITY OF STORMWATER RUNOFF FROM THE SITE IN BOTH THE PRE- AND POST -DEVELOPED CONDITION FLOWS TO THE NORTH OF THE SITE TOWARD THE EXISTING STORMWATER BIORETENTION BASIN, WITH SOME FLOW DISCHARGING INTO EXISTING STORM INLETS ALONG COLVIN ALLEY. EXISTING SITE CONDITIONS THE SITE IS LOCATED AT THE INTERSECTION OF COLBERT STREET AND BELVEDERE BOULEVARD IN ALBEMARLE COUNTY, VIRGINIA. COLVIN ALLEY IS TO THE EAST, COLBERT STREET IS TO THE WEST, AND BELVEDERE BOULEWARD IS TO THE SOUTH. RUNOFF FROM THE SITE FLOWS AS SHEET FLOW AND PIPE FLOW TO AN EXISTING STORMWATER BIORETENTION BASIN TO THE NORTH OF THE SITE. THE PROPERTY IS CURRENTLY VACANT SPACE (TURF) AND SLOPES TO THE NORTHWEST AT A SLIGHT (2-4%) GRADE. THE PAD FOR THE PROPOSED BUILDING WILL BE LOCATED ON THE WESTERN PORTION OFF THE SITE WITH EXISTING ELEVATIONS BETWEEN 482' AND 500'. THIS AREA WILL BE GRADED TO THE FINISHED FLOOR ELEVATION OF 487.5'. ADJACENT PROPERTY THE SITE IS BORDERED BY RESIDENTIAL DEVELOPMENT TO THE WEST AND SOUTH AND WOODED LAND TO THE NORTH AND EAST. NO PROPERTY OUTSIDE OF PROPERTY WITH THE EXCEPTION OF LIMITED AREAS IN THE RIGHT-OF-WAYT WILL BE DISTURBED. HE CONTRACTOR SHALL BE RESPONSIBLE FOR IMPLEMENTING THE APPROVED EROSION AND SEDIMENT CONTROL PLAN ALONG WITH FINAL STABILIZATION AND MAINTENANCE OF ALL OFF-SITE AREAS. PLANNED OFF SITE ACTIVITIES ANY EXCESS OR UNSUITABLE MATERIAL WILL BE TRANSPORTED TO OFF-SITE DISPOSAL AREAS WITH EROSION CONTROL PLANS THAT ARE APPROVED BY THE AUTHORITY HAVING JURISDICTION. THE NAMES OF ANY OIFFSITE AREAS MUST BE PROVIDED TO ALBEMARLE COUNTY BEFORE ANY SOIL IS TRANSPORTED OFFSITE. SOILS A NATURAL RESOURCE CONSERVATION SERVICE (NRCS) CUSTOM SOIL RESOURCE REPORT FOR ALBEMARLE COUNTY, VIRGINIA DATED DECEMBER 14, 2016 SHOWS ONE MAIN SOIL TYPE ON THE SITE; CULLEN LOAM. CULLEN LOAM IS CLASSIFIED AS HYDROLOGIC SOIL GROUP B WITH VERY LOW TO MODERATELY HIGH KSAT VALUES (0.00 TO 0.20 IN/HR). L- G m a IN W 64 to]► MAW 92,i NO KNOWN CRITICAL EROSION AREAS EXIST ON SITE. DURING EARTHWORK, STEEP SLOPES WITH NO VEGETATIVE COVER CAN BECOME CRITICAL IF PROPER MEASURES ARE NOT IMMEDIATELY TAKEN, INCLUDING SURF -ACE ROUGHENING AND STABILIZATION. REGULAR INSPECTIONS SHALL BE CONDUCTED ACROSS THE ENTIRE SITE TO ENSURE THESE SLOPES DO NOT BECOME EROSIVE AS CONSTRUCTION PROGRESSES. IN GENERAL, THE CONTRACTOR SHALL MINIMIZE THE AREAS DISTURBED AT ONE TIME AND SHALL IMMEDIATELY APPLY SEED AND MULCH TO DENUDED AREAS AFTER WORK IS PERFORMED. DIURING CONSTRUCTION, SEDIMENT SHALL NOT BE ALLOWED TO ENTER THE EXISTING STORMWATER BIORETENTION BASIN. EROSION AND SEDIMENT CONTROL MEASURES UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO THE LATEST STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. UNLESS WAIVED OR APPROVED BY LOCAL ADMINISTRATOR„ THE MINIMUM STANDARDS OF VESCR SHALL APPLY. MINIMUM STANDARDS: A VESCP MUST BE CONSISTENT WITH THE FOLLOWING CRITERIA, TECHNIQUES AND METHODS: 1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THA1N 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 MAIDE 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 PIER ACRE OF DRAINAGE AREA AND THE C 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. & 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 OTHERIWISE 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 NONEROMBLE 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 FOLLOWINIG 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 MANNIER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES. 18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE VESCP AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 19. PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA. STREAM RESTORATION AND RELOCATION PROJECTS THAT INCORPORATE NATURAL CHANNEL DESIGN CONCEPTS ARE NOT MAN-MADE CHANNELS AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS: a. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR MAN-MADE RECEIVING CHANNEL, PIPE OR STORM SEWER SYSTEM. FOR THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM SHALL BE PERFORMED. b. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE FOLLOWING MANNER: (1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE AREA TO THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE HUNDRED TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OF THE PROJECT IN QUESTION; OR (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 TEN-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 TEN-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 TEN-YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO-YEAR STORM WILL NOT CAUSE EROSION TO THE CHANNEL, THE BED, OR THE BANKS; OR (2) IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE TEN-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 TEN-YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL, OR (4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENIT, STORMWATER DETENTION OR OTHER MEASURES WHICH IS SATISFACTORY TO THE VESCP AUTHORITY TO PREVENT DOWNSTREAM EROSION. d. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE IMPROVEMENTS. e. ALL HYDROLOGIC ANALYSES SHALL BE BASED ON THE EXISTING WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT CONDITION OF THE SUBJECT PROJECT. f. IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES STORMWATER DETENTION, HE SHALL OBTAIN APPROVAL FROM THE VESCP OF A PLAN FOR MAINTENANCE OF THE DETENTION FACILITIES. THE PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY AND THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE. g.OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED TO A RECEIVING CHANNEL, AND ENERGY DISSIPATORS SHALL BE PLACED AT THE OUTFALL OF ALL DETENTION FACILITIES AS NECESSARY TO PROVIDE A STABILIZED TRANSITION FROM THE FACILITY TO THE RECEIVING CHANNEL. h. ALL ON-SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE. L INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE EROSION OR SEDIMENTATION ON ADJACENT PROPERTY SHALL BE DIVERTED TO A STABLE OUTLET, ADEQUATE CHANNEL, PIPE OR PIPE SYSTEM, OR TO A DETENTION FACILITY. j. IN APPLYING THESE STORMWATER MANAGEMENT CRITERIA, INDIVIDUAL LOTS OR PARCELS IN A RESIDENTIAL, COMMERCIAL OR INDUSTRIAL DEVELOPMENT SHALL NOT BE CONSIDERED TO BE SEPARATE DEVELOPMENT PROJECTS. INSTEAD, THE DEVELOPMENT, AS A WHOLE, SHALL BE CONSIDERED TO BE A SINGLE DEVELOPMENT PROJECT. HYDROLOGIC PARAMETERS THAT REFLECT THE ULTIMATE DEVELOPMENT CONDITION SHALL BE USED IN ALL ENGINEERING CALCULATIONS. k. ALL MEASURES USED TO PROTECT PROPERTIES AND WATERWAYS SHALL BE EMPLOYED IN A MANNER WHICH MINIMIZES IMPACTS ON THE PHYSICAL, CHEMICAL AND BIOLOGICAL INTEGRITY OF RIVERS, STREAMS AND OTHER WATERS OF THE STATE. I. ANY PLAN APPROVED PRIOR TO JULY 1, 2014, THAT PROVIDES FOR STORMWATER MANAGEMENT THAT ADDRESSES ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS SHALL SATISFY THE FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS IF THE PRACTICES ARE DESIGNED TO (1) DETAIN THE WATER QUALITY VOLUME AND TO RELEASE IT OVER 48 HOURS; (11) DETAIN AND RELEASE OVER A 24-HOUR PERIOD THE EXPECTED RAINFALL RESULTING FROM THE ONE YEAR;, 24-HOUR STORM; AND (III) REDUCE THE ALLOWABLE PEAK FLOW RATE RESULTING FROM THE 1.5, 2, AND 10 -YEAR, 24-HOUR STORMS TO A LEVEL THAT IS LESS THAN OR EQUAL TO THE PEAK FLOW RATE FROM THE SITE ASSUMING IT WAS IN A GOOD FORESTED CONDITION, ACHIEVED THROUGH MULTIPLICATION OF THE FORESTED PEAK FLOW RATE BY A REDUCTION FACTOR THAT IS EQUAL TO THE RUNOFF VOLUME FROM THE SITE WHEN IT WAS IN A GOOD FORESTED CONDITION DIVIDED BY THE RUNOFF VOLUME FROM THE SITE IN ITS PROPOSED CONDITION, AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITW REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS AS DEFINED IN ANY REGULATIONS PROMULGATED PURSUANT TO § 62.11-44.15:54 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 SHALIL BE SATISFIED BY COMPLIANCE WITH WATER QUANTITY REQUIREMENTS IN THE STORMWATER MANAGEMENT ACT (§ 62.1-44.15:24 ET SEQ. OF THE CODE OF VIRGINIA) AND ATTENDANT REGULATIONS, UNLESS SUCH LAND -DISTURBING ACTIVITIES ARE IN ACCORDANCE WITH 9VAC25-870-48 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) REGULATIONS. n. COMPLIANCE WITH THE WATER QUANTITY MINIMUM STANDARDS SET OUT IN 9VAC25-870-66 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) REGULATIONS SHALL BE DEEMED TO SATISFY THE REQUIREMENTS OF SUBDIVISION 19 OF THIS SUBSECTION. STRUCTURAL PRACTICES 1. SAFETY FENCE - 3.01 A PROTECTIVE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF' AN EROSION CONTROL MEASURE. SAFETY FENCE SHALL BE USED TO RESTRICT CONSTRUCTION ACTIVITIES IN THE AREAS OF PROPOSED STORMWATER BEST MANAGEMENT PRACTICES TO PROTECT THE UNDERLYING SOILS. 2. TEMPORARY CONSTRUCTION ENTRANCE - 3.02 A STONE OR ASPHALT PAD, LOCATED AT THE POINT OF VEHICULAR INGRESS AND EGRESS TO THE CONSTRUCTION SITE. THE PURPOSE IS TO PREVENT OR REDUCE THE AMOUNT OF MUD TRANSPORTED TO THE PUBLIC ROAD. SEDIMENT DISLODGED OR WASHED FROM THE VEHICLE WILL BE DIRECTED TO A PROPER SEDIMENT TRAPPING AREA. 3. SILT FENCING - 3.05 SILT FENCE SEDIMENT BARRIERS WILL BE INSTALLED DOWN SLOPE OF SMALLER DISTURBED AREAS TO FILTER SEDIMENT LADEN RUNOFF. 4. STORM DRAIN INLET PROTECTION - 3.07 THE INSTALLATION OF SEDIMENT TRAPPING MEASURES AROUND DROP' INLET OR CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. LIMITED TO DRAINAGE AREAS NOT EXCEEDING 1 ACRE, AND NOT INTENDED TO CONTROL LARGE, CONCENTRATED STORMWATER FLOWS. 5. TEMPORARY DIVERSION DIKE - 3.09 TEMPORARY RIDGE OF COMPACTED SOIL TO BE CONSTRUCTED AT BASE OF SLOPING DISTURBED AREAS TO DIVERT SEDIMENT -LADEN RUNOFF FROM THE DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY OR AT THE TOP OF SLOPING DISTURBED AREAS TO DIVERT UPSTREAM RUNOFF AROUND THE UNPROTECTED DISTURBED SLOPE TO A STABILIZED OUTFALL. 6. TEMPORARY SEDIMENT TRAP - 3.13 A TEMPORARY SEDIMENT TRAP SHALL BE CONSTRUCTED AS SHOWN ON THE PLANS TO DETAIN SEDIMENT -LADEN RUNOFF LONG ENOUGH FOR THE MAJORITY OF SEDIMENT TO SETTLE OUT. 7. RIPRAP - 3.19 STRUCTURALLY LINED ENERGY DISSIPATING APRONS TO BE PLACED AT' THE OUTLETS OF TEMPORARY PIPES OR CHANNEL SECTIONS. INSTALLED TO PREVENT SCOUR AT STORM DRAIN OUTLETS, TO PROTECT THE OUTLET STRUCTURE AND TO MINIMIZE THE POTENTIAL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWATER FLOWS. TO BE REMOVED ONCE NO LONGER NEEDED. & ROCK CHECK DAMS - 3.20 SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF THE SWALE OR DITCH. LIMITED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS. 9. SURFACE ROUGHENING - 3.29 GRADING PRACTICE TO BE APPLIED TO STEEPER SLOPES TO SLOW THE VELOCITY OF RUNOFF DOWN THE SLOPE AND HELP PREVENT RILL EROSION. COMMON APPROACH IS TO RUN A BULL -DOZER PERPENDICULAR TO THE SLOPE TO CREATE SMALL POCKETS IN THE SLOPE WITH THE TREADS. 10. DUST CONTROL - 3.39 DUST CONTROL MEASURES WILL BE USED OVER THE WHOLE SITE TO REDUCE SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBANCE, DEMOLITION, AND CONSTRUCTION ACTIVITIES. VEGETATIVE PRACTICES GENERAL: A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED BY CONCRETE, PAVEMENT OR LANDSCAPED MULCHED BEDS. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM„ MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. NEW VEGETATION SHALL BE MAINTAINED FOR ONE FULL YEAR AFTER PLANTING. NEW SEEDING SHALL BE SUPPLIED WITH ADEQUATE MOISTURE, ESPECIALLY LATE IN THE SEASON, AND IN ABNORMALLY HOT OR DRY WEATHER. STABILIZATION PRACTICES SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THE APPROPRIATE VESCH STD. & SPEC. AND AS PER THE EROSION AND SEDIMENT CONTROL PLAN. SELECTION OF THE APPROPRIATE SEED MIXTURE FOR TEMPORARY SEEDING WILL DEPEND UPON THE TIME OF YEAR IT IS APPLIED. 1. TOPSOILING - 3.30 A 2" TO 4" LAYER OF TOPSOIL WILL BE APPLIED TO ALL LANDSCAPED AND GRASSED AREAS. THE TOPSOIL SHALL BE FREE OF ROCKS AND DEBRIS. TOPSOIL ALLOWS A STRONGER AND HEALTHIER STAND OF GRASS TO ESTABLISH QUICKLY TO STABILIZE UNPAVED AREAS OF THE SITE. 2. TEMPORARY SEEDING - 3.31 TEMPORARY SEEDING SHALL BE APPLIED OVER CLEARED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 14 DAYS. TEMPORARY SEEDING MIXES SHALL BE AS DESCRIBED IN VESCH STD. & SPEC. 3.31. • SEQUENCE OF INSTALLATION: WHEN CLEARED AREAS WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 14 DAYS. • MAINTENANCE: REFER TO STD. & SPEC. 3.31; AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION ARE TO BE RESEEDED. • REMOVAL EVENT: AS NEEDED FOR FUTURE EARTHWORK. 3. PERMANENT SEEDING - 3.32 USED ON ALL AREAS AT FINAL GRADE AND WILL NOT RECEIVE HARDSCAPE OR OTHER LANDSCAPE. PERMANENT SEEDING SHALL ALSO BE USED ON ALL AREAS THAT ARE NOT AT FINAL GRADE AND THAT WILL BE LEFT DORMANT FOR A PERIOD OF MORE THAN 1 YEAR. IF CONFLICTS EXIST BETWEEN THE PROJECT SPECIFICATIONS AND THE VESCH STD. & SPEC. 3.32, THE MORE STRINGENT REQUIREMENT SHALL APPLY. PERMANENT SEEDING MIXES AND RATES ARE FOUND IN VESCH STD. & SPEC. 3.32. • SEQUENCE OF INSTALLATION: WITHIN 7 DAYS OF ACHIEVING FINAL GRADE • SOIL TESTING REQUIREMENTS: REFER TO STD. & SPEC. 3.32 • MAINTENANCE: REFER TO STD. & SPEC. 3.32; AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION ARE TO BE IMMEDIATELY RESEEDED, FOLLOWING IDENTIFICATION OF THE CAUSE OF POOR GERMINATION. 4. MULCHING - 3.35 APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE TO PREVENT EROSION BY PROTECTING THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. IT IS ALSO USED TO FOSTER THE GROWTH OF VEGETATION BY INCREASING AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. MULCHING WILL BE APPLIED THROUGHOUT CONSTRUCTION ON DENUDED AREAS. 5. SOIL STABILIZATION BLANKETS & MATTING - 3.36 BIODEGRADABLE MATTING INSTALLED OVER STEEP SLOPES TO HOLD THE EARTH AND SEED IN PLACE WHILE A GOOD STAND OF VEGETATION IS ESTABLISHED. PERMANENT MATFTING SHALL BE INSTALLED IN AREAS WITH ANTICIPATED HIGH FLOW VELOCITIES UNDER FINAL PROJECT CONDITIONS. PERMANENT STABILIZATION ALL AREAS WITHIN THE LIMITS OF DISTURBANCE AND OUTSIDE THE BUILDING FOOTPRINT SHALL BE STABILIZED WITH PERMANENT SEEDING, LANDSCAPING OR PAVEMENT FOLLOWING FINAL GRADING. CONSTRUCTION SCHEDULE 1. A PRE -CONSTRUCTION CONFERENCE WILL BE REWIRED. CONTACT THE OWNER, ALBEMARLE COUNTY AND ALL APPROPRIATE PARTIES TO SET UP THE MEETING AT LEAST ONE WEEK PRIOR TO STARTING CONSTRUCTION. 2. THE CONTRACTOR IS RESPONSIBLE FOR ENSURING ALL APPLICABLE PERMITS ARE IN PLACE PRIOR TO STARTING CONSTRUCTION. 3. ALL ITEMS OF WORK NECESSARY TO COMPLETE THIS PROJECT SHALL BE IN COMPLIANCE WITH ALL LOCAL, STATE, AND FEDERAL CODES. 4. PRIOR TO ANY LAND DISTURBING ACTIVITY, CONTRACTOR SHALL PROVIDE THE NAME, CERTIFICATION INFORMATION, AND CONTACT INFORMATION OF THE DESIGNATED RESPONSIBLE LAND DISTURBER (RLD) TO THE APPROPRIATE AUTHORITIES. 5. PHASE 1 - INITIAL E&S MEASURES AND FIELDHOUSE PAD PRIOR TO STARTING CONSTRUCTION, INITIAL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE INSTALLED AND MADE OPERATIONAL AS SHOWN ON SHEET 04-A. a.INSTALL CONSTRUCTION ENTRANCE AS SHOWN ON THE PLAN. DISTURB THE MINIMUM AREA NEEDED TO INSTALL THE ENTRANCES. b.INSTALL SILT FENCE AS SHOWN ON THE PLAN. c. CONSTRUCT THE SEDIMENT TRAP. DISTURB THE MINIMUM AREA NEEDED TO INSTALL THE TRAP AND REMOVE THE MINIMUM VEGETATION. DURING CONSTRUCTION, TEMPORARY DIVERSION DIKES SHALL BE INSTALLED JUST UPHILL OF THE BASIN TO DIVERT ALL UPSTREAM RUNOFF AROUND THE TRAP. d.INSTALL SAFETY FENCE AROUND SEDIMENT TRAP AS SHOWN ON THE PLAN. e. APPLY SEEDING TO SEDIMENT TRAP BERMS AND DISTURBED AREAS IMMEDIATELY AFTER GRADING IS COMPLETE. f. INSTALL PERIMETER SILT FENCE, DIVERSION DIKES, INLET PROTECTION, RIPRAP AND ANY OTHER MEASURE DEEMED NECESSARY THROUGH INSPECTIONS BY THE RLD, DEQ, COUNTY OR ENGINEER. IMMEDIATELY SEED ALL DIVERSION DIKES. g. CLEAR AND GRUB AREAS REQUIRED FOR CONSTRUCTION. TOPSOIL SHOULD BE STOCKPILED AND SAVED FOR USE DURING FINAL SITE GRADING. h. BRING THE FIELDHOUSE PAD TO FINAL GRADE AND STABILIZE. i. THROUGHOUT CONSTRUCTION ACTIVITIES, APPLY DUST CONTROL MEASURES ACCORDING TO VESCH STD. & SPEC. 3.39. ANY AND ALL MATERIAL OR DEBRIS TRACKED ONTO A PUBLIC OR PRIVATE ROAD SURFACE WILL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM ROADS BY SHOVELING OR SWEEPING AND BE TRANSPORTED TO A SEDIMENT CONTROLLED DISPOSAL AREA. j. APPLY TEMPORARY SEEDING AND MULCHING /AS NECESSARY. 6. PHASE 2 -BUILDING CONSTRUCTION AND FINAL STABILIZATION a. RELOCATE PERIMETER EROSION AND SEDIMENT CONTROL MEASURES FROM PREVIOUS PHASE AS SHOWN ON PLANS. EROSION AND SEDIMENTATION CONTROLS SHALL BE 'MAINTAINED UNTIL SUCH A TIME AS A VEGETATIVE COVER IS ESTABLISHED OR HARDSCAPE IS INSTALLED ON ALL AREAS UPHILL OF THE MEASURES. NOTE THAT THE DIVERSION TO THE EAST OF THE FIELDHOUSE PAD IS NOT TO BE REMOVED UNITIL THE DOWNSTREAM SWALE HAS BEEN FULLY STABILIZED. b.INSTALL ALL ADDITIONAL MEASURES SHOWN ON THE PLANS AND AS DEEMED NECESSARY THROUGH INSPECTIONS BY THE RLD, DEQ, COUNTY OR ENGINEER. c. REMOVE SEDIMENT TRAP FOLLOWING STABILIZATION OF FIELDHOUSE PAD AND THE INSTALLATION OF PHASE 2 EROSION & SEDIMENT CONTROL MEASURES. d. BEGIN EARTHWORK AND THE PLACEMENT AND COMPACT FILL MATERIAL ON THE SITE. UTILIZE SURFACE ROUGHENING AND TEMPORARY FILL DIVERSIONS PER THE ESCH GUIDELINES. e.INSTALL ALL STORMWATER PIPING, INCLUDING INLET PROTECTION ON ALL INLETS AS THEY ARE INSTALLED AND BECOME OPERATIONAL. f. INSTALL UTILITIES (WATER, ELECTRICAL, SANITARY SEWER, ETC.). ALL EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES, WHERE PERMITTED. g.USE APPROPRIATE DUST CONTROL MEASURES FOR DISTURBED AREAS AS WELL AS TEMPORARY SEEDING AND STRAW MULCHING AS NECESSARY. h. PROCEED WITH BUILDING, HARDSCAPES AND LANDSCAPE INSTALLATION. L FINALIZE MAJOR CONSTRUCTION ACTIVITIES OF THE PHASE. j. APPLY PERMANENT SEEDING, TOPSOIL AND STRAW MULCHING TO ALL DISTURBED AREA, OUTSIDE OF THE HARDSCAPE AND MULCHED LANDSCAPED AREAS. INSTALL TEMPORARY BLANKET MATTING ON ALL DISTURBED SLOPE 3:1 AND STEEPER. k. ALL STORMWATER PIPES AND STRUCTURES SHALL BE CLEANED OF ALL DEBRIS AND SEDIMENT BUILD UP. I. ONCE UPSTREAM AREAS HAVE BEEN STABILIZED AND HAVE ESTABLISHED VEGETATION, NOTIFY THE INSPECTORS FOR AN INSPECTION. m. ONCE APPROVAL IS ACQUIRED FROM THE INSPECTOR AND ALL UPSTREAM AREAS HAVE ESTABLISHED VEGETATION, ALL REMAINING EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS. APPLY PERMANENT SEEDING AND MULCHING TO AREAS DISTURBED BY REWOVAL OF MEASURES. n. REMOVE ALL EQUIPMENT, CONSTRUCTION MAITERIALS AND DEBRIS FROM THE SITE. MAINTENANCE PRIOR TO ANY LAND DISTURBING ACTIVITY, CONITRACTOR SHALL PROVIDE THE NAME, CERTIFICATION INFORMATION, AND CONTACT INFORMATION OF THE DESIGNATED RESPONSIBLE LAND DISTURBER (RLD) TO THE APPROPRIATE AUTHORITIES. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE INSPECTED PER THE CONSTRUCTION GENERAL PERMIT. DURING CONSTRUCTION, THE CONTRACTOR'S DESIGNATED RLD WILL BE RESPONSIBLE FOR INSPECTING AND REPAIRING DAMAGED EROSION/SEDIMENT CONTROL MEASURES. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. THE STONE CONSTRUCTION ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOW OF MUD OFF OF THE SITE. THE STONE MAY NEED TO BE WASHED AND REWORKED OR ADDITIONAL STONE ADDED TO ENSURE THE ENTRANCE IS PROPERLY FUNCTIONING. 2. THE SILT FENCE AND INLET PROTECTION BARRIERS SHALL BE CHECKED FOR UNDERMINING AND DETERIORATION OF OR DAMAGE TO THE FABRIC. DAMAGES SHALL BE IMMEDIATELY REPAIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES ONE HALF THE HEIGHT OF THE BARRIER. 3. THE DIVERSION DIKES SHALL BE INSPECTED FOR ANY DAMAGE CAUSED BY EROSION OR CONSTRUCTION ACTIVITY AND TO ENSURE A GOOD STAND OF GRASS IS ESTABLISHED. DAMAGES SHALL BE IMMEDIATELY REPAIRED. 4. THE SEDIMENT TRAP SHALL BE CHECKED TO ENSURE IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION ACTIVITY AND A GOOD STAND OF GRASS IS MAINTAINED. ALL ISSUES SHALL BE CORRECTED IMMEDIATELY. SEDIMENT BUILD UP SHALL BE REMOVED FROM THE TRAP AND THE TRAP RESTORED TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE HALF THE DESIGN VOLUME OF THE WET STORAGE. 5. RIPRAP SHALL BE INSPECTED FOR SCOUR BENEATH THE RIPRAP OR FILTER FABRIC OR DISLODGED STONES. DAMAGES SHALL BE IMMEDIATELY REPAIRED. 6. ALL SEDIMENT REMOVED FROM TRAPPING MEASURES SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE OF CAUSE SEDIMENTATION PROBLEMS. 7. THE SEEDED AND MULCHED AREAS SHALL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. REFER TO ESC TECHNICAL BULLETIN #4. PROVIDE REMEDIAL STABILIZATION AND SEEDING FOR A PERIOD OF ONE YEAR AFTER CONSTRUCTION. �Tx OF 6-f'Af ' HRISTOPHER E. SONNE ", Lie. No. 020621 A4' ONAL it di(o u Q rr Q z O z 0 U I ►►. z 0 W O W U Z iN+ ca 0 U a 0 E U Z ai (D U. a� .n U e _m L L 0 e N O Q N N 119 a N �� deo U N => Yc� as o LL O sTL93 U Urn N T co REVISIONS 1/26/2017 COUNTY COMMENTS DESIGNED BY: CES DRAWN BY: AJH CHECKED BY: LBL SCALE: NO SCALE DATE: 12/19/2016 PROJECT NUMBER: C1681 OC -01 z 0 z D O U J Q W m Q