Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
WPO201900039 Plan - Stormwater 2020-09-09
QItl l,y,ngilP h°'' HILLCREST VINEYARD TASTING &VENUE VS VICINITY MAP RMAi �G2u &pksrlle Poitl _ P tNnPike Us _ .- U550 plke _ APtkrislibaP?�r� _4,Y �v Cosa Sri 'wy 000t � lurks Mounw se n� j aoa a SITE 3, m p+ o- VICINITY MAP SCALE: 1" = 2000' SITE INFORMATION PARCEL ID #: 06900-00-00-02000 ACREAGE: 123.84 AC ZONING: AG ADDRESS: 8585 DICK WOODS ROAD AFTON, VA 22920 OWNER: AUGUSTA PROFESSIONAL PARK LLC ATT: MICHAEL MCGINNIS PO BOX 300 LYNDHURST VA, 22952 LAT/LONG: 38.020000,-78.860510 ,'vv WPO 2019 8585 DICK WOODS ROAD AFTON, VA 22952 APPROVED by the Albemarle County Community Development Department Date 09/16/2020 File WP02019-00039, Amendment #1 SWM Plan Amendment #1; includes ESC/PPP Phase 2-13, sheet C-3.02-B for detention basin #2. Ref. WP0201900039 ESC Plan Amendment #1 for amended ESC measures approved 7/2/2020. VIRGINIA CERTIFIED RESPONSIBLE LAND DISTURBER NAME -PRINTED SIGNATURE PHONE # COMPANY ADDRESS DATE MP SHEET INDEX Sheet List Table Sheet Number Sheet Title C-0.01 TITLE SHEET C-1.01 GENERAL NOTES C-2.01 EXISTING CONDITIONS C-2.02 STEEP SLOPES & SOILS MAP C-2.03 SOILS LEGEND C-3.00 OVERALL PLAN OF DEVELOPMENT C-3.01—A ESC/PPP PHASE 1 A C-3.01—B ESC/PPP PHASE 1 B C-3.01C ESC/PPP PHASE 1 C P — C-302—B ESC/PPP PHASE 2 — B — .0 —C S S — C C-3.03R ESC/PPP NOTES C-4.01 SITE LAYOUT C6.01R EXISTING DRAINAGE C-6.02R PROPOSED DRAINAGE C-6.03R STORMWATER MANAGEMENT PLAN C-6,041 R ENLARGED DETENTION BASIN #1 C 6.042R ENLARGED DETENTION BASIN #2 C 6.043R STORMWATER DETAILS C-9.01 DETAILS C-9.02 DETAILS C-9.03 DETAILS C-9.04 DETAILS C-9.05 DETAILS W9 V NOTE: *STORMWATER MANAGEMENT STRATEGY REVISED TO REMOVE AGRICULTURAL POND FROM PROJECT PER VA—DEQ DETERMINATION. ASSOCIATED DISTURBANCE/MITIGATION OF RIPARIAN BUFFER HAS LIKEWISE BEEN REMOVED. STORMWATER MANAGEMENT HAS BEEN RELOCATED TO OTHER LOCATIONS ON PROPERTY, FOLLOWING AS —BUILT CONDITIONS OF CONVEYANCE MEASURES. THIS PLAN AMENDMENT REFLECTS BOTH AS BUILT CONVEYANCE AND REVISED MANAGEMENT STRATEGIES (SHEETS CO-3.03R, C6.01 R, C6.05R) AS WELL AS ESC MEASURES NEEDED TO CONSTRUCT STORMWATER MANAGEMENT FACILITIES AS REVISED IN THESES PLANS H �E mar (8)"'SETH R DERICKc. c. 0414.54 Sept a, 2020 g 4 LLI W co CLO z�oo� CV O UJ `vA\\J — I �OZSQ)LU �o (D 0 Lr) LL- J C/) No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 Stormwater Management 9 01 2020 11 Stormwater Management 9 09 2 220 PRELIMINARY ISSUE NOT FOR CONSTRUCTION TITLE SHEET Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR C-0.01 CID \ I I II I ( I INSTALL SILT FENCE ON EITHER j I -SIDE OF EXISTING CHANNEL I I I I I I/ INSTALL CHECK DAMS IN SF EXISTING CHANNEL ` F I \ GE \ -L • SILT FENCE J-HOOKS I I DC + ON EITHER SIDE OF CHANNEL \ 8s0� �l III\ SF�`\ J S SF • CD / SI F NCE J- CONS \8 % ON EITHER E F 0 TFALL / CHEF DAM BELOW OU FALL I I BASIN #2 CONSTRUCTION PHASE 1 CLEARING AND GRUBBING E&S LAYOUT \ %I II �/ - � jJ IIII o . b 00 � O I I w PS MU I I- / TS TO I _ PS MU I \ • a TO DC a�R CE O O b 00 00 °° 00 • \1190 • SF / SI FENCE J- 0OKS \8 ON EIT ER E F 0 TFALL s �- / CHECK DAM BELOW OUTFALL BASIN #2 CONSTRUCTION PHASE 3 FINAL STABILIZATION E&S LAYOUT 71 I Ili I Q� \ I DC�Q I - �� SILT FENCE CULVERT - I � SF INLET PROTECTION TEMPORARY CULVERT CROSSING ICIP SEE DETAIL SHEET C6.043R / DC I I I CE • � /� J I 1 �X + SF 89°\ - J S SF� , / CD SI FENCE J- 0OKS \8 �• ON EIT ER E F 0 TFALL jCHE� DAM BELOW OU FALL I I \ BASIN #2 CONSTRUCTION PHASE 2 EMBANKMENT CONSTRUCTION E&S LAYOUT ALBEMARLE COUNTY GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1. 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. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE O SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. EROSION AND SEDIMENT CONTROL SEQUENCING • SITE LIES WITH IN HAYSEVILLE LOAM AND CHESTER LOAM COMPLEX. SOILS ON SITE ARE VERY STONY AND STEEP IN SOME AREAS. DISTURBED AREAS WITH STEEP SLOPES SHALL BE MINIMIZED. • A COPY OF EROSION & SEDIMENT CONTROL PLANS AND PERMIT MUST BE KEPT ON SITE AT ALL TIMES. • ALL PUMPING OF SEDIMENT LADEN WATER FROM EXCAVATIONS SHALL BE THROUGH A SEDIMENT FILTER BAG OVER A STABILIZED SURFACE. • CONCRETE WASH WATER SHALL BE HANDLED IN ACCORDANCE WITH LOCAL ORDINANCES. IN NO CASE SHALL IT BE ALLOWED TO ENTER ANY SURFACE OR GROUND WATER SYSTEMS. • SPECIAL CARE SHALL BE MADE TO AVOID SEDIMENT TRANSFER TO DOWNSTREAM PROPERTIES. ADHERING TO THE SEQUENCE BELOW IS CRITICAL TO THIS REGARD. • NO TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHOUT THE PRIOR APPROVAL OF THE COUNTY EROSION AND SEDIMENT ADMINISTRATOR OR DESIGNATED REPRESENTATIVE. PHASE 1: 1. CONTRACTOR IS TO SCHEDULE PRE -CONSTRUCTION MEETING WITH COUNTY AND ENGINEER OF RECORD. 2. NOTIFY ALBEMARLE COUNTY AT LEAST 3 DAYS PRIOR TO LAND DISTURBING ACTIVITIES. 3. THE CONTRACTOR IS RESPONSIBLE FOR MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL MEASURES. 4. INSTALL CONSTRUCTION ENTRANCE, PERIMETER CONTROL SILT FENCING. 5. 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 WITH DRY METHODS (NO WASHING) AT THE END OF EACH DAY. 6. INSTALL SILT FENCE AND CHECK DAMS ALONG/IN EXISTING CHANNEL. 7. CLEAR AND GRUB SITE. PHASE 2: 8. CUT AND PLACE CUTOFF TRENCH FOR EMBANKMENT. 9. INSTALL STORMWATER DETENTION BASIN #2 RISER AND BARREL, TEMPORARY CULVERT CROSSING, AND SILT FENCE CULVERT INLET PROTECTION. 10. REMOVE AND STOCKPILE TOP SOIL FOR REUSE AT CLOSE OF PROJECT. 11.COMMENCE EMBANKMENT CONSTRUCTION. PLACE FILL IN LIFTS NO GREATER THAN 8", COMPACT TO 95% MAX PROCTOR DENSITY. DO NOT PLACE FILL IF IN SITU SOIL OR FILL MATERIAL IS SATURATED OR FROZEN. 12. INSTALL STORMWATER DETENTION BASIN #2 EMBANKMENT AND EMERGENCY SPILLWAY. PHASE 3: 13.FOLLOWING STABILIZATION OF REMAINDER OF SITE, WHERE FEASIBLE, CONTRACTOR SHALL DEWATER SEDIMENT LADEN WATER THROUGH SEDIMENT FILTER BAG, REMOVE AND STABILIZE SEDIMENT. DEWATERING AND DECOMMISSION SHALL BE MADE DURING A DRY PERIOD WITH NO RAIN PREDICTED. 14. UPON TEMPORARY CESSATION OF AN EARTH DISTURBING ACTIVITY OR ANY STAGE OR PHASE OF AN ACTIVITY WHERE A CESSATION OF EARTH DISTURBANCE WILL EXCEED 4 DAYS THE SITE SHALL BE IMMEDIATELY SEEDED, MULCHED OR OTHERWISE PROTECTED FROM EROSION AND SEDIMENTATION PENDING FUTURE EARTH DISTURBING ACTIVITIES. 15.IMMEDIATELY AFTER EARTH DISTURBING ACTIVITIES CEASE, THE CONTRACTOR SHALL STABILIZE THE DISTURBED AREAS. IF WEATHER DOES NOT PERMIT VEGETATION, MULCH MUST BE APPLIED (VESCH - 3.35). 16.IN AREAS TO BE TOPSOILED AND PLANTED SCARIFY SUBSOIL 6 TO 12 INCHES PRIOR TO PLACEMENT OF TOPSOIL. ALL AREAS TO BE VEGETATED SHALL HAVE 4 INCHES MINIMUM TOPSOIL. TOPSOIL SHALL NOT BE PLACED WHEN FROZEN OR EXCESSIVELY WET. PROPOSED EROSION AND SEDIMENT CONTROL LEGEND SAF SAFETY FENCE (3.01) CE CONSTRUCTION ENTRANCE (3.02) CRS CONSTRUCTION ROAD STABILIZATION (3.03) �s SF SILT FENCE (3.05) P, STORM DRAIN INLET PROTECTION (3.07) CIP CULVERT INLET PROTECTION (3.08) DV TEMPORARY DIVERSION DIKE (3.09)� 0 WD RIGHT OF WAY DIVERSION (3.11)_ ST SEDIMENT TRAP (3.13) ST TO TOP SOILING (3.30) TO TS TEMPORARY SEEDING (3.31) TS PS PERMANENT SEEDING (3.32) PS O MULCHING (3.35) DC DUST CONTROL (3.39) DC SB SEDIMENT BASIN (3.14) GQ ROCK CHECK DAM (3.20) - - _ LIMITS OF DISTURBANCE SEDIMENT BASIN DRAINAGE AREA 11.94 AC DISTURBED AREA ��..7O' u SET Lic.4.le, SS g O � LO z�ooM N �OZSC:)Q) UJ LL UZ�Lcr,))� v ) =Q No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 Stormwater Management 9 01 2020 11 Stormwater Management 9 09 2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION ESC/PPP PHASE 2-B Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR C-3.02-B EROSION AND SEDIMENT CONTROL NARRATIVE 1. PROJECT DESCRIPTION: THIS PROJECT WILL CONSIST OF A TASTING ROOM FOR THE VINEY AN EVENT VENUE, AND ASSOCIATED PARKING. THE DISTURBED AREA FOR THIS PROJECT WILL B 94 AC. 2. EXISTING SITE CONDITIONS: THIS SITE IS LOCATED AT 8585 DICK WOODS ROAD AND PROJECT AREA CONSISTS OF AN EXISTING FARM ACCESS ROAD, CLEARED SITE, AND AN EXISTING FARM POND. THE PROJECT MINIMIZES IMPACTS TO STEEP SLOPES. NO FLOOD PLAINS ARE ON SITE. 3. ADJACENT AREAS: THIS PARCEL AND ALL ADJOINING PARCELS ARE RURAL AGRICULTURAL OR R20 RESIDENTIAL. THE AGG. PARCEL TO THE WEST IS CURRENTLY ALSO USED AS A VINEYARD. 4. OFF -SITE AREAS: THE SITE SHOULD NOT REQUIRE FILL OR WASTE TO BE IMPORTED/EXPORTED FROM OFF SITE. ANY OFF -SITE LAND -DISTURBING ACTIVITY ASSOCIATED WITH THE PROJECT MUST BE PERMITTED THROUGH THE APPROPRIATE JURISDICTION. 5. SOILS: REFER TO C2.02 & C2.03 FOR SOILS INFORMATION. 6. CRITICAL AREAS: THERE ARE NO SPRINGS, WETLANDS, OR FLOOD PLAINS IN THE PROJECTS LIMITS. DISTURBANCE OF STEEP SLOES (C2.02) ON SITE WILL MINIMIZED. ALL CUT AND FILL SLOPES IN THE PROJECT AREA SHALL BE 3H:1V OR LESS. UTILIZE EC2 BLANKET MATTING ON ALL 3:1 SLOPES. 7. EROSION AND SEDIMENT CONTROL MEASURES: UNLESS OTHERWISE INDICATED ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO THE MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, THIRD EDITION, 1992, AS WELL AS ANY ADDITIONAL MEASURES REQUIRED BY APPLICABLE LOCAL, STATE AND FEDERAL REGULATIONS. STRUCTURAL PRACTICES 3.02 - CONSTRUCTION ENTRANCE - A STABILIZED STONE PAD WITH FILTER FABRIC UNDERLINER LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. 3.03 - CONSTRUCTION ROAD STABILIZATION - THE TEMPORARY STABILIZATION OF ACCESS ROADS; SUBDIVISION ROADS, PARKING AREA, AND OTHER ON -SITE VEHICULAR TRANSPORTATION ROUTES WITH STONE IMMEDIATELY AFTER GRADING. 3.05 - SILT FENCE BARRIER - A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED. 3.07 - STORM DRAIN INLET PROTECTION - A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. 3.08 - CULVERT INLET PROTECTION - A SEDIMENT FILTER LOCATED AT THE INLET TO STORM CULVERTS. 3.11 - TEMPORARY RIGHT OF WAY DIVERSION - A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. 3.12 - TEMPORARY SEDIMENT TRAP - A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. 3.14 - TEMPORARY SEDIMENT BASIN - A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AND EARTHEN EMBANKMENT WITH A RISER TO DETAIN SEDIMENT LADEN RUNOFF FROM DISTURBED AREAS LONG ENOUGH FOR THE MAJORITY OF SEDIMENT TO SETTLE OUT. 3.15 - TEMPORARY SLOPE DRAIN - A FLEXIBLE PIPE EXTENDING FROM THE TOP PAST THE TOE OF A CUT OR FILL SLOPE TO CONVEY WATER DOWN THE FACE OF THE SLOPE WITHOUT CAUSING EROSION. 3.20 - ROCK CHECK DAMS - SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. 3.26 - DEWATERING STRUCTURE - A TEMPORARY SETTLING AND FILTER DEVICE FOR WATER WHICH IS DISCHARGED FROM DEWATERING ACTIVITIES. VEGETATIVE PRACTICES 3.30 - TOPSOIL (STOCKPILE) - METHODS OF PRESERVING AND USING THE SURFACE LAYER OF UNDISTURBED SOIL, OFTEN ENRICHED IN ORGANIC MATTER, IN ORDER TO OBTAIN A MORE DESIRABLE PLANTING AND GROWTH MEDIUM. 3.31 - TEMPORARY SEEDING - THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RABIDLY GROWING ANNUAL PLANTS. 3.32 - PERMANENT SEEDING - THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED. 3.35 - MULCHING - APPLICATION OF PLANT RESIDUES OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. 3.39 - DUST CONTROL - REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, , DEMOLITION, AND CONSTRUCTION ACTIVITIES. 8. PERMANENT STABILIZATION: ALL DISTURBED AREAS SHALL BE STABILIZED WITH PERMANENT SEEDING WITHIN SEVEN WORKING DAYS OF FINAL GRADING, WEATHER AND SOIL CONDITIONS PERMITTING, AS S E IE I T 0 C S IC ST N R D SP CI C 10 S 0 VI I 9. STORMWATER RUNOFF CONSIDERATIONS: POST -DEVELOPMENT STORMWATER WILL BE COLLECTED AND DIRECTED TO THE NEW STORMWATER MANAGEMENT DETENTION BASINS. THE BASINS & RISERS WILL BE ENGINEERED TO RELEASE STORMWATER ACCORDING TO 9-VAC25-870-66, 9.1. THE PROJECT MEETS STORM WATER QUALITY REQUIREMENTS THROUGH 26.00 AC DEDICATED FOREST AND OPEN SPACE EASEMENTS. 9.2. DESIGN MEETS CHANNEL PROTECTION REQUIREMENT 9-VAC25-870-66 THROUGH: 9.2.1. B.3.c. - THE DETENTION BASIN #2 RELEASES THE 1-YEAR 24-HOUR STORM EVENT AT A FLOWRATE THAT MEETS ENERGY BALANCE CRITERIA. ENERGY BALANCE IS MET AT POINT OF ANALYSIS B. (SEE ATTACHED STORMWATER CALCULATIONS). 9.2.2. D - DETENTION BASIN #2 RELEASES THE 2YR-24HR STORM AND THE 10 YR-24HR STORM THROUGH A LEVEL SPREADER AS SHEET FLOW. 9.2.3. D - SHEET FLOW TO STABILIZED VEGETATED SURFACE. A PORTION OF THE IMPROVED ROAD DRAINS TO POINTS A & B AS SHEET FLOW. SHEET FLOW IS MAINTAINED ACROSS A STABILIZED AND VEGETATED SLOPE TO NATURAL CHANNEL OR DETENTION BASIN. 9.3. DESIGN MEETS FLOOD PROTECTION REQUIREMENT 9VAC25-870-66 C.2.b. THE PROJECT RELEASES POST -DEVELOPMENT PEAK FLOWRATE FOR THE 10-YEAR 24-HOUR STORM EVENT THAT IS LESS THAN OR EQUAL TO PRE -DEVELOPMENT FLOW RATE AT POINTS OF ANALYSIS A & B. 10. MAINTENANCE: THE CONTRACTOR IS RESPONSIBLE FOR MAINTENANCE OF EROSION AND SEDIMENT CONTROLS. TEMPORARY AND PERMANENT EROSION AND SEDIMENT CONTROL BMPS SHALL BE MAINTAINED AND REPAIRED AS NEEDED TO ASSURE CONTINUED PERFORMANCE OF THEIR INTENDED FUNCTION. MAINTENANCE AND REPAIR SHALL BE CONDUCTED IN ACCORDANCE WITH THE APPROVED PROJECT SPECIFIC STANDARDS AND SPECIFICATIONS. CONDUCT INSPECTIONS OF TEMPORARY ESC CONTROLS AND SWM BMPS AT LEAST ONCE EVERY FOUR BUSINESS DAYS, AND WITHIN 48 HOURS FOLLOWING A MEASURABLE STORM EVENT. REPAIR OF ALL INEFFECTIVE TEMPORARY ESC MEASURES SHALL OCCUR WITHIN 24 HOURS OF IDENTIFICATION, OR AS SOON AS CONDITIONS ALLOW IF COMPLIANCE WITH THIS TIME FRAME WOULD RESULT IN GREATER ENVIRONMENTAL IMPACTS. TEMPORARY BMPS WILL BE REMOVED UPON ACHIEVING VEGETATIVE STABILIZATION. DISTURBED AREAS NOT ATTAINING AN ACCEPTABLE VEGETATIVE COVER SHALL BE RE -SEEDED AS NEEDED UNTIL STABILIZATION IS ACHIEVED. TEMPORARY ESC BMPS SHOULD BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION IS ACHIEVED OR AFTER THE TEMPORARY BMPS ARE NO LONGER NEEDED. TRAPPED SEDIMENT SHALL BE REMOVED OR STABILIZED ON SITE. DISTURBED SOIL RESULTING FROM REMOVAL OF BMPS OR VEGETATION SHALL BE PERMANENTLY GENTFAELIOEDSION AND SEDIMENT CONTROL NOTES: ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS 9VAC25-840 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: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES-5: PRIOR TO COMMENCING LAND -DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES-7: ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. MINIMUM STANDARDS (MS) ALL LAND -DISTURBING ACTIVITIES UNDERTAKEN ON PRIVATE AND PUBLIC LANDS IN THE COMMONWEALTH OF VIRGINIA MUST MEET THE 19 "MINIMUM STANDARDS" FOR ESC IN SECTION 4VAC50-30-40 OF THE VIRGINIA ESC REGULATIONS. THE APPLICANT WHO SUBMITS THE ESC PLAN TO THE PROGRAM AUTHORITY FOR APPROVAL IS RESPONSIBLE FOR ENSURING COMPLIANCE WITH THE MINIMUM STANDARDS THAT APPLY TO HIS/HER ACTIVITIES. MS-1 SOIL STABILIZATION. PERMANENT OR TEMPORARY STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN 7 DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN 7 DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. MS-2 SOIL STOCKPILE STABILIZATION. DURING CONSTRUCTION, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. TEMPORARY PROTECTION AND PERMANENT STABILIZATION SHALL BE APPLIED TO ALL SOIL STOCKPILES ON THE SITE AND BORROW AREAS OR SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE, MS-3 PERMANENT STABILIZATION. 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 & TRAPS. SEDIMENT BASINS, SEDIMENT 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. MS-5 STABILIZATION OF EARTHEN STRUCTURES. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKE'S AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. MS-6 SEDIMENT TRAPS & SEDIMENT BASINS. SEDIMENT TRAPS AND BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN AS FOLLOWS: A. SEDIMENT TRAPS: 1. ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES. 2. MINIMUM STORAGE CAPACITY OF 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. B. SEDIMENT BASINS: 1. CONTROL DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE ACRES. 2. MINIMUM STORAGE CAPACITY OF 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. 3. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN DURING A TWENTY-FIVE YEAR STORM OF 24-HOUR DURATION. MS-7 CUT AND FILL SLOPES DESIGN & CONSTRUCTION. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. MS-8 CONCENTRATED RUNOFF DOWN SLOPES. 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 SLOPE MAINTENANCE. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. MS-10 STORM SEWER INLET PROTECTION. ALL STORM SEWER INLETS MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN WATER CANNOT ENTER THE STORMWATER CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED/ TREATED TO REMOVE SEDIMENT. MS-11 STORMWATER CONVEYANCE PROTECTION. 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 WORK IN LIVE WATERCOURSE. 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. 17 MS-13 CROSSING LIVE WATERCOURSE. 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. �� MS-14 REGULATION OF WATERCOURSE CROSSING. ALL APPLICABLE FEDERAL STATE AND LOCAL REGULATIONS \�'/ PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET. 17 �/ MS-15 STABILIZING OF WATERCOURSE. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED. MS-16 UNDERGROUND UTILITY LINE INSTALLATION. 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 THESE REGULATIONS. F. COMPLY WITH APPLICABLE SAFETY REGULATIONS. MS-17 VEHICULAR SEDIMENT TRACKING. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS: A. PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. B. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. C.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. MS-18 REMOVAL OF TEMPORARY MEASURES. 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 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 MS-19 STORMWATER MANAGEMENT. 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 E EXEMPT FROM ANY FLOW RATE CAPACITY AN VELOCITY REQUIREMENTS FOR B D Q 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 1.1.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. 1_2.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 1.3.PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY THE USE OF A 10-YEAR STORM TO VERIFY THAT STORMWATER WILL BE CONTAINED WITHIN THE PIPE OR SYSTEM. C. IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS OR PIPES ARE NOT ADEQUATE, THE APPLICANT SHALL: 1. IMPROVE THE CHANNELS TO A CONDITION WHERE A 10-YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO-YEAR STORM WILL NOT CAUSE EROSION TO THE CHANNEL, THE BED, OR THE BANKS; OR 2. IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE 10-YEAR STORM IS CONTAINED WITHIN THE APPURTENANCES; 3. DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TWO-YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A NATURAL CHANNEL OR WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A 10-YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL; OR 4. PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT, STORMWATER DETENTION OR OTHER MEASURES WHICH IS SATISFACTORY TO THE VESCP AUTHORITY TO PREVENT DOWNSTREAM EROSION. D. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE IMPROVEMENTS. E. ALL HYDROLOGIC ANALYSES SHALL BE BASED ON THE EXISTING WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT CONDITION OF THE SUBJECT PROJECT. F. IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES STORMWATER DETENTION, HE SHALL OBTAIN APPROVAL FROM THE VESCP OF A PLAN FOR MAINTENANCE OF THE DETENTION FACILITIES. THE PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY AND THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE. G. OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED TO A RECEIVING CHANNEL, AND ENERGY DISSIPATORS SHALL BE PLACED AT THE OUTFALL OF ALL DETENTION FACILITIES AS NECESSARY TO PROVIDE A STABILIZED TRANSITION FROM THE FACILITY TO THE RECEIVING CHANNEL. H. ALL ON SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE. 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 INDIVID UAL UAL LOTS OR PARCELS IN A D 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; 2. DETAIN AND RELEASE OVER A 24-HOUR PERIOD THE EXPECTED RAINFALL RESULTING FROM THE ONE YEAR, 24-HOUR STORM; AND 3. REDUCE THE ALLOWABLE PEAK FLOW RATE RESULTING FROM THE 1, 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; UNLESS SUCH LAND -DISTURBING ACTIVITIES ARE IN ACCORDANCE WITH 9VAC25-870-48 OF THE VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) REGULATION OR ARE EXEMPT. 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. H �.O O � LING✓ � �Z u SETH R DERICK 9 Lic. o. 041454 w �� Sept SS t 0 9, 2020 NAL Cs �5 v ) zz�oN O Q � (z 00 U Ll O LL UZ�Lcr,))� V J 00 J v r~)^ No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 Stormwater Management 9 01 2020 11 Stormwater Management 9 09 2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION ESC/PPP NOTES Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR C-3.03R I��ii�l�� dill <<li ;�w v��� v �v� �i�% iiij III I��� �—�•� �>>>> �1// �� �/� /„ ,,-- v v vvvv, ���/�/;y_ --_--� � � � � � � � v i � � i �,� ,- I II \ \\ \V AVv�v \ V v A y III IIII III ✓v��� A\ 1 I I Ill /// / / /✓/ II////j/ /�_—vv `���`=_ y� ///// i ----�. vv A V A \ \ \ � I I I I I r xx ;/ / /i / //// // / III l \\ \( ( --/ i/ _—_, \ \ \\ _ --;✓ � / \�\ \-- - DRAINAGE AREA NORTH PRE \• \\ \ — vDEVELOPMENT 4.00 AC VINESY1�0 TYP LONGEST / — — / FLOW PATH 1� _ \ \ % �271 FT 1 \\ \ \ \ \ -A� I// / — — � \I / �� ,,,�� __—�—\ EXISTING I/I11111 �I�11 I �� I i ��� v I // / // _ HOUSE DRAINAGE AREA I III \ // / :— \ ✓/ /- 1 SOUTH 1 PRE /// j/////'DEVELOPMENT 1.75 AC LONGEST // ``vim ,_y v `v vy ✓ //// % //// %�' _ �� �= -=i /ii% / i��V v _`—� —y A / I I 1 I I ✓ y FLOW PATH v // / y� ---- III I �II�I v / 669FT- /� — ---- \ — \ '24' DRIVEWAY TO HAVE MAXIMUM / / / // // /� /i' \ \ \ / > SLOPE OF 15% & CURVES No — — — — — — = LESS THAN 40' RADIUSI / ////// /. %// //\\\ ' — / 18" DRAINAGE PIPE RUNNING uNDER —__ /// ���'I 11 _ �� VINES i / / \ TYP ZZ //// LONGEST FLOW / — / / \ \ \\ \\\ - — — � / / PATH 2693 LF 15.098 ACRES (DEDICATED / — — / TO PUBLIC USE) / / \ FOREST/OPEN SPACE / / \ / EASEMENT 4— \ — _ FOREsr/OPEN SPACE -- A I \ — - LIMIT EASEMENT —�A - PRE DEVELOPMENT / �J DEDICATED To PUBLICI(` v �A �— ' / / --`\\ — DRAINAGE TO POA-- // usE) t90e \\ � / _ // ..III \� � \\��\ ///// \ ��\ B 26.74 AC / —_ / tj���/ �24DRIVEWAY TO HAVE MAXIMUM LESS ETHOAN140' RADIUSES NO / \ I _ , /// Illllll IIII/ �\ �•�� I _y=�/ // '8� //ii���/ / v\ DRAINAGE SOUTH 2 PRE �� \ / / / 1 ���• / \ A �� / / — ✓� - %_ _�' %/ // /\ A DEVELOPMENT 49.29 AC v� vvvvv P°AIB I /III vvvvvvv�Yt I i IIII���' / / / ROAD TO FOLLOW EXISTING CULVERT EXlST1NGROADBED 36" CPP & GRADE ✓ / / @5 / \ I / / — ✓ _ \ — ✓ / \ \ ( INV IN - 851.3 �/ ���4�/ / // / / ✓� —_—_� \ \ \\ I /// — =--%— ---� J / \\\\\<\�� \ \ ^ram \\\ \ \\ INV OUT - 842.1 / // 1 /•/ / 1 `\ \\ — /// /� 1-- —//\ I \\ \ \ \ EXISTING 36' DRAINAGE PIPE UNDER ROAD ` --- ---- — — \ \ I / \— FAREMXISRTOAD\I CENTER LINE \ ` ,n OD - POND t 4-9 / / �\ ELEVATION = 728.70 FTDAM 18" CPP I \I I\ ELEVATION 734.51FT./ / ✓/ // / ) I I I I / // /1 1 \ / 1 i / / // 1—\ �__` I I ` /� INV IN - 822.4 J) \ \ \ / — / INV OUT - 815.s 1 ) I / / l l l I/ / \�I V /f / -- / /IIILI 4285 ACRES (DEDICATED To �,e� / / \ I / // / ( \ / — I �•},. .\ \ \ \ \ I \I\ \ \ / \, \ \ — PUBLIC USE) FOREST/OPEN, D✓ / / / / / ) I / r — / / / I \ '� y / ,,\ \ \ \ \ \\ \ \ \ \ _ / SPACE LIMIT EASEMENT I �' / // J / / / / / I \ l EXISTING VINE"YARD / XISTING / / / / — _ EXISnNc 4.200 / / \ \ FARM ROAD/ \\ ' AREA ACRES FOREST & / / / / / A Or,J CEN ER If // / I / I / 7 // / \ I ( / / 1 1 L1' aPACE FA�EMENH A // / /� / I I � �_ // // �V / / y / I I IIII I \ y �, / 1 V v_ � /— / / / \\ 1\\\�\_ _���✓I\1 V I\1. // 1 V 111 � v-- yv v//✓'�'"\ �_ � �`' / /� v�l / J I I vv , \\ xSTNG / / ////III// LEVATION=723.23 Ff. \\\ /II11 I/ -- \\ 1007 RESERVE//'! \ —y• • sue/ I `\ / % ) 1 \ \ \\\ J \\\ \ / / EXISTING �/ \ AREA FOR SEPTIC FARM ROAD / // / //ELECTRICAL LINE / / \ I 1 A I / DRAIN FIELD A SEPTIC DRAIN FIELD / �� "FNTRA E r \ V / / EASEMENT <' V \ v I \ // \ 1 It —v-- y_-- — y 1 I / I op// // ) I I I y I �/ / 1 1 A FOREST AND OPEN SPACE EASEMENT SCALE:• • • • 150 3011 H � SETH R DERICI 9 Lic. O. 041454 wry �.lA Sept SSjONAL 4, 2020 ��� \ y W CO ii z�oo� N �OZSQ)Q) UJ UZ�L0 00 C) T� y Q No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 1 Stormwater Management 9 01 2020 11 Stormwater Management 9 D9 2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION EXISTING DRAINAGE PLAN Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR C-6.01 R' R V i/;';;IIIIII IIII V IjIII,i GRADING NOTES: \\ \\\�' \\,\\\ \ \� \ I I ll) \\i /% \\\\ Ijlj� l �-�� j i i /—� _!�J� \_� \ \ j j \ // / WORK EXCEEDS SURVEY LIMITS. j I 1 ( / / \ I 1 I I ✓ j / ��� _�� / _ \' \ l I L CONTRACTOR TO ENSURE REASONABLE \�\� I I (I \// TYING of GRADES. \\ iii-\�\- -- 1�\\ \\\\ \\\ \ \�\ ,��✓/ j \ _DETENTION BASIN — \ \ ` \\ \ \ / % \\� / j' / ///, \\ \\,\\\ �_ -DRAINAGE AREA \ I LONGEST FLOW = - \ \ �� \ \ ` \\\ \ % /✓/ I\ \ N. \ \ II / / �— \\\ I 1 ! _ -i 1 --_ vy y ///� \ w� - PATH 9g1 LE /ll 7 (i Y �/ (i jil/ i'/'//// / ��///�/' /r',/// //�j/)/'/'/j//////,///�j//////%�//,/ l/�/i �,,/ i///, /�/// i,// ////////�i/ // j,/- i,�////� % /j�l//i/i_ ,/�// /,/�/l�i ////i��/ �//��—`����'_ -/\�w��\\1\-�.w5'\-1A \.\V_lA0\ <�A\ �V9'\\'A�`\w\�-'_ \�v�� \ ,� /vv-/ v—�—vv�w_y l_v�v'v, y-- v.--� ��-- —A --_ -�'✓l--✓ // /i%.--'/-�%� //)_; _ //ii--_//_/%-�'% i---',/-- /i����i� /- �_—/' _i%_= �-;--/i,� //�%/f/�- -� - i�/�/- /��—,�//i�_,j � /\ _�-/��- I =/ — � �=--- ,I �1 , � —_ �^-�`\�—�—_ �_� �l�-- �— -i,—��i--- �-�_—�v'/—_ __—y"_�--_�--�/_� —v_ / y--l. -/—J �_'--i/— ���_//�/-/17'i/ i%/%/� _l /i_ —/ � /'�//'/l ////? �//////i/���/i�—= i � /////w/f/! / /' �/(l /-/�/%/ "/ ////%"—� i lIl�—l/// /// /%-/\/�v/'�iI I/ �� I/ !— / I,�l ,/ ///II �IIi 'l �l / I� //I (/�/I /i\/�� /// �yl�\ /- / \�; //(/ \-- �\/ \/\I� \ � \\ — — v�\\ A� � Ii \I/�1 - \\v\ \I A , \ \ \- \\v/ I , I gine.leSrSing &4, L2 ReDveiesw SCALE: 1" = 150'-0' Compliance Strategy Summary Open Space Conserved by Easement 126.0 acres, B soils] SECTION MANAGED TURF IMPERVIOUS AREA FOREST AND OPEN SPACE EASEMENT 26.00 AC TO BE PLACED IN FOREST/OPEN SPACE EASEMENT TO MEET STORMWATER QUALITY REQUIREMENTS. STORMWATER POND AND RISER SIZED FOR 3.50 AC OF IMPERVIOUS AREA IN FUTURE DEVELOPMENT TO ADDRESS QUANTITY AND CHANNEL PROTECTION. STORMWATER QUALITY REQUIREMENTS FOR FUTURE DEVELOPMENT ARE NOT ADDRESSED IN THIS PROJECT. ANDERSONS CREEK -ROCKFISH RIVER ARE NOT COLD WATER TROUT STREAMS. GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. A GEOTECHNICAL ENGINEER SHALL VERIFY THE SOIL COMPACTION OF THE DETENTION BASIN EMBANKMENTS, SHOULD COMPACTION REPORTS FROM CONSTRUCTION NOT BE OTHERWISE AVAILABLE. VERIFICATION SHALL INCLUDE SOME COMBINATION OF BORINGS WITH SOIL ANALYSIS AND STANDARD PENETRATION TESTS. OTHER METHODS MAY BE UTILIZED IF DEEMED SUFFICIENT AND RESPONSIBLE BY THE ENGINEER AND COUNTY REPRESENTATIVES. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. GRADING NOTES: • WORK EXCEEDS SURVEY LIMITS. CONTRACTOR TO ENSURE REASONABLE TYING OF GRADES. DITCH 'C' PRE/POST DEVELOPMENT CHANNEL VELOCITY ANALYSIS SECTION 2YR PRE DEV (FT/S) 2YR POST DEV (FT/S) 10YR PRE DEV (FT/S) 10YR POST DEV (FT/S) A -A 2.67 2.90 3.81 3.98 B-B 2.53 2.78 3.81 3.88 C-C 2.42 2.65 3.76 3.90 DIVERSIONS PARABOLIC DIVERSION TRAPEZOIDAL DIVERSION VEE-SHAPED DIVERSION EXISTING PERMANENT FILL DIVERSION OBSERVED TO BE ADEQUATE DURING MONTEVERDE DESIGN PROFESSIONAL. PIPE CENTERLINE 15" PIPE OUTLET BYPASS IS INSTALLED AND WAS SITE VISIT ON 6/27/2020 17 NOTE: 1. CONTRACTOR SHALL ENSURE GROUTED RIPRAP REMAINS LOWER THAN INVERT OF INCOMING AND OUTGOING PIPES AS TO NOT BLOCK FLOW. 2. STANDARD MH-1 BASE WITH IS-1 INLET SHAPING MAY BE UTILIZED IN LIEU OF GROUTED RIPRAP. H �lli' � 1 SETH R DERICK 9 Lic. o. 041454 wry �.lA Sept SS10NAL 4, 20?.0 g co Lr) z�oo� CV �OZSQ:)UJ �o LL- UZ�Lcr,))00 J C/) = Q No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 Stormwater Management 9 01 2020 11 Stormwater Management 9 D9 2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION STORMWATER MANAGEMENT PLAN Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR C-6.03R Q U • • • 25 • 4) 1•• UPPER DITCH A — TRIANGULAR CHANNEL SIDE SLOPES 3:1 6' BANK WIDTH 1.5' DEPTH 15.87 SLOPE CHANNEL VELOCITY 10YR : 5.68 FT/S LOWER DITCH A — TRAPEZOIDAL CHANNEL 4:1 SIDE SLOPES 11' BOTTOM WIDTH 0.5' DEPTH 28.5% SLOPE CHANNEL VELOCITY 1OYR:3.04 FT/S ]8 -Ns-(1 G ROOM 7 J.� 7 I I I IG PERMANENT FILL DIVERSION / 7 AROUND NORTH EAST SIDE OF BASIN AND ACROSS EMERGENCY SPILLWAY TO EMBANKMENT AND RISER STRUCTURE MAX SLOPE = 12.5% LOW FLOW ORIFICE FILTER ASSEMBLY 6" PERFORATED PVC WRAPPED IN #57 STONE & NON —WOVEN GEOTEXTILE, CAP TERMINAL END, MOUND ASSEMBLY WITH > #57 STONE 16" HIGH, 2' WIDE LOW FLOW ORIFICE PLATE TO BE INSIDE RISER AND ACCESSIBLE FOR MAINTENANCE AND CLEANING EXISTING SEDIMENT BASIN RISER AND BARREL TO BE REUSED FOR DETENTION BASIN SEE DETAIL C6.041—R 7 /' 7 ? UPPER DITCH A� UPPER SECTION GRASS LINING WITH EC-3 TYPE I MATTING )ITCH A LOWER SECTION BERMUDA GRASS LINING GRADING NOTES: • WORK EXCEEDS SURVEY LIMITS. CONTRACTOR TO ENSURE REASONABLE TYING OF GRADES. 9'-01, Mqk ��. MFX GRASS LINED WITH EC-3 TYPE I I IPPGQ I)IT(`W 'A' QG(`TlnKl 18" CMP OUT: 1070.40' 2" LOW FLOW ORIFICE: 1070.50' _ �o".o"o"o�o �o�n c5io�0"0" 0„ MINIMUM 18%18" #57 STONE WRAPPED WITH NON —WOVEN GEOTEXTILE AROUND 6" PERFORATED PVC PIPE MIN 20' LENGTH CONNECT FROM PERFORATED PIPE TO RISER. INV IN: 1071.00' INV OUT: 1070.40' DETENTION BASIN #1 SECTION 15'-0" Mq� D'-6" `._BERMUDA GRASS LINING I n1A1QQ nIT(`W 'A' QQ(`TInK1 V ""- 11.I.V. EMBANKMENT CREST: 1080.00' TOP WIDTH 10' MIN EMERGENCY SPILLWAY: 1077.75' 30' WIDTH L UI,II ILL 11A1 L V I I nwuvl I —I I THREADED PIPE PLUG AT RISER INV ELEV: 1070.50' (NOT TO SCALE) 18" CMP WITH F.E.S. 60 FT @ 1.0% INV IN : 1070.40' INV OUT: 1069.80' CONCRETE FLOW BYPASS STRUCTURE 6' DIA. 4' HEIGHT RIM: 1072.10 , PI-1 TO LEVEL SPREADER 18' @ 33% INV IN: 1069.30 INV OUT: 1063.00 I s 81' 1 I STORMWATER DETENTION BASIN #1 W/ 3:1 SIDE SLOPES 30' VEGETATED EMERGENCY SPILLWAY G �6' DIA CONCRETE RI aN -WEIR STRUCTURE. -15" CMP 24 LF @ 33% W/ ANCHORS. SEE DETAIL PI-1 SHEET C6.043R �4'1 56' ENGINEERED LEVEL SPREADER W/ PLUNGE POOL. LIP ELEV. = 1064.50' EMBED 2' OF LEVEL SPREADER LIP ON EITHER END INTO COMPACTED SLOPE. CONSTRUCT A RISING 4:1 SLOPE AWAY FROM EACH END OF THE EMBEDDED ENGINEERED LEVEL SPREADER TO ENSURE CONCENTRATED FLOW DOES NOT CUT A PATH AROUND EITHER END OF LEVEL SPREADER. EMBANKMENT � 11V1V RELATIVELY IMPERVIOUS CORE (GC, _SC, CL - SOILS ONLY) IMPERVIOUS OR IMPERVIOUS OR SEMI —PERVIOUS SEMI —PERVIOUS SHOULDER SHOULDER CLEARED GROUND LEVEL CUTOFF 4' min. 4' min. CONCRETE BLOCK WIDTH = PIPE DIA. X 2 TYPICAL CONCRETE BASE RIP RAP PIPE Tn Tno r 11T1 ` SIDES, TYP PLUNGE POOL DIMENSIONS BASED ON PIPE OUTLET DIA WIDTH: 13' LENGTH: 10` STEEL PLATE THICKNESS = 0.25" MIN STEEL PLATE WIDTH — PIPE DIA. X 2 TYPICAL STEEL BASE LANDOWNERS (CURRENT AND FUTURE) OF HILLCREST VINEYARD LOCATED AT 8585 DICK WOODS RD. AFTON, VA. OR DESIGNATED AGENT SHALL BE RESPONSIBLE FOR THE MAINTENANCE OF THE BMPS LOCATED ON SITE. THE STORMWATER MANAGEMENT PLAN CONSISTS OF DEDICATED FOREST AND OPEN SPACE EASEMENT AND AN EXISTING FARM POND. NUTRIENT MITIGATION REQUIREMENTS FOR THIS PROJECT ARE MET THROUGH 26 ACRES DEDICATED OPEN SPACE. CHANNEL PROTECTION AND FLOOD PROTECTION REQUIREMENTS ARE MET THROUGH STORMWATER DETENTION BASINS. THE STORM SYSTEM WILL COLLECT STORMWATER RUNOFF FROM THE BUILDINGS ROOF LEADERS AND PARKING AREA AND CONVEY STORMWATER TO A NEW DETENTION POND. THE PONDS WILL RELEASE THE WATER THROUGH A RISER AND SPILLWAY STRUCTURE AT OR LESS THAN PRE -DEVELOPMENT FLOWRATES THAT MEET ENERGY BALANCE REQUIREMENTS. 1.1. MAINTENANCE AGREEMENTS THE VIRGINIA STORMWATER MANAGEMENT REGULATIONS (4 VAC 50-60) SPECIFY THE CIRCUMSTANCES UNDER WHICH A MAINTENANCE AGREEMENT MUST BE EXECUTED BETWEEN THE OWNER AND THE VSMP AUTHORITY, AND SETS FORTH INSPECTION REQUIREMENTS, COMPLIANCE PROCEDURES IF MAINTENANCE IS NEGLECTED, NOTIFICATION OF THE LOCAL PROGRAM UPON TRANSFER OF OWNERSHIP, AND RIGHT -OF -ENTRY FOR LOCAL PROGRAM PERSONNEL. • RESTRICTIVE COVENANTS OR OTHER MECHANISM ENFORCEABLE BY THE VSMP AUTHORITY MUST BE IN PLACE TO HELP ENSURE THAT STORMWATER MANAGEMENT STRUCTURES ARE MAINTAINED, AS WELL AS TO PASS THE KNOWLEDGE ALONG TO ANY SUBSEQUENT PROPERTY OWNERS. • ACCESS TO STORMWATER MANAGEMENT STRUCTURES SHOULD BE COVERED 8Y AN EASEMENT TO ALLOW ACCESS BY THE VSMP AUTHORITY TO CONDUCT INSPECTIONS AND PERFORM MAINTENANCE WHEN NECESSARY. • ALL STORMWATER MANAGEMENT STRUCTURES MUST INCLUDE A LONG TERM MAINTENANCE AGREEMENTS CONSISTENT WITH THE PROVISIONS OF THE VSMP REGULATIONS, AND MUST INCLUDE THE RECOMMENDED MAINTENANCE TASKS AND A COPY OF AN ANNUAL INSPECTION CHECKLIST. • THE MAINTENANCE AGREEMENT SHOULD ALSO INCLUDE CONTACT INFORMATION FOR OWNERS TO GET LOCAL OR STATE ASSISTANCE TO SOLVE COMMON NUISANCE PROBLEMS, SUCH AS MOSQUITO CONTROL, GEESE, INVASIVE PLANTS, VEGETATIVE MANAGEMENT AND BEAVER REMOVAL. 9.1. MAINTENANCE INSPECTIONS MAINTENANCE OF STORMWATER MANAGEMENT STRUCTURES IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE STRUCTURE, INCLUDING THE FOLLOWING: • MEASURE SEDIMENT ACCUMULATION LEVELS IN FOREBAY. • MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES. • INSPECT THE CONDITION OF STORMWATER INLETS TO THE STRUCTURE FOR MATERIAL DAMAGE EROSION OR UNDERCUTTING. • INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. • INSPECT STRUCTURE OUTFALL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, ETC. • INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION, ETC. • INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING,. LEAKAGE, DEBRIS ACCUMULATION, ETC. • INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. • INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE STRUCTURE FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY. • BASED ON INSPECTION RESULTS, SPECIFIC MAINTENANCE TASKS WILL BE TRIGGERED. EXAMPLE MAINTENANCE INSPECTION CHECKLISTS FOR STORMWATER MANAGEMENT STRUCTURES CAN BE ACCESSED IN APPENDIX C OF CHAPTER 9 OF THE VIRGINIA STORMWATER MANAGEMENT HANDBOOK (2010). FACILITY MAINTENANCE ACTIVITIES: STORMWATER MANAGEMENT STRUCTURES INSPECTIONS AND SPOT CHECKS: THE OWNERS, DESIGNATED AGENT OR CONTRACTED MAINTENANCE WILL INSPECT AND CERTIFY THE STORMWATER MANAGEMENT STRUCTURES AND ASSOCIATED STORM SYSTEM ON THE INDIVIDUAL PROPERTY CONTINUE TO FUNCTION AS DESIGNED AND INSTALLED. INSPECTION FINDINGS SHALL BE DOCUMENTED IN DETAIL WITH NOTES AND PHOTOS IN THE PROJECT FILE. THE INSPECTOR SHALL PROVIDE WRITTEN NOTIFICATION TO THE LANDOWNERS AND DESIGNATED AGENT OF THE ANNUAL INSPECTION AND FINDINGS. THE OWNERS/DESIGNATED AGENT SHALL BE RESPONSIBLE FOR REMEDYING ANY DEFICIENCIES FOUND. REMOVE BLOCKAGES FROM INFLOW STRUCTURES: ANY TRASH OR DEBRIS THAT IS BLOCKING OR IMPEDING OPERATION OF AN INFLOW STRUCTURE AND/OR FOREBAY SHALL BE REMOVED, IN ADDITION, LANDSCAPE TRIMMINGS SHALL BE PROPERLY DISPOSED OF TO PREVENT CLOGGING BY THE VEGETATIVE DEBRIS. BLOCKAGES HAVE THE ABILITY TO RAISE THE DESIGN WATER LEVEL IN THE FACILITY. BE AWARE OF POTENTIAL SOURCES OF ILLICIT DISCHARGES WITHIN THE DEBRIS. IF THE BLOCKAGE REQUIRES PHYSICAL ENTRY INSIDE THE STRUCTURE, PLEASE OBSERVE ANY CONFINED SPACE REQUIREMENTS. REMOVE BLOCKAGES FROM OUTFLOW STRUCTURES: ANY TRASH OR DEBRIS, EITHER "NATURAL OR "MAN-MADE," THAT IS BLOCKING OR IMPEDING OPERATION OF AN OUTFLOW STRUCTURE SHALL BE REMOVED SO THAT THE OUTFLOW IS FULLY FUNCTIONAL AGAIN. BLOCKAGES HAVE THE ABILITY TO RAISE THE DESIGN WATER LEVEL IN THE FACILITY. BE AWARE OF POTENTIAL SOURCES OF ILLICIT DISCHARGES WITHIN THE DEBRIS. IF THE BLOCKAGE EXTENDS INTO THE OUTLET STRUCTURE REQUIRING PHYSICAL ENTRY INSIDE THE STRUCTURE, PLEASE OBSERVE ANY CONFINED SPACE REQUIREMENTS. REMOVE ACCUMULATED SEDIMENT > 5": ALL FACILITY INLETS, BASINS, SUMPS, PIPES, AND STORMWATER STORAGE AREAS SHALL BE CLEANED OF SEDIMENT TO RETURN THE AREA TO ORIGINAL DESIGN GRADES AND ENSURE FUNCTIONALITY. SEDIMENT SHALL BE DISPOSED OF IN ACCORDANCE WITH LOCAL, STATE AND FEDERAL REQUIREMENTS. CARE SHALL BE TAKEN TO MINIMIZE THE EXTENT OF ANY LAND DISTURBANCE AND TO LEAVE THE SITE IN NONEROSIVE PRE -MAINTENANCE CONDITION. OPERATIONS SHALL FOLLOW ANY STATE AND/OR CITY ESC STANDARD AND NUTRIENT MANAGEMENT PLAN. TO PREVENT FUTURE SEDIMENTATION., THE SOURCES MUST BE IDENTIFIED AND REMEDIED. REPAIR EROSION: THIS INCLUDES UPLAND DRAINAGE AREAS THAT MAY BE CONTROLLABLE SOURCES OF SEDIMENT OR EROSION. EROSION CAN CONTRIBUTE TO SEDIMENTATION IN THE BASIN AND ALSO MAY WEAKEN THE STRUCTURE, DEPENDING ON ITS SEVERITY AND LOCATION. EROSION SHALL BE CORRECTED BY SEEDING, GRADING, AND/OR INSTALLATION OF SOIL STABILIZATION MATTING TO CORRECT THE DEFICIENCY. VEGETATED OPEN SPACE NO MAJOR DISTURBANCE MAY OCCUR WITHIN THE CONSERVED OPEN SPACE DURING OR AFTER CONSTRUCTION (IE., NO CLEARING OR GRADING IS ALLOWED EXCEPT TEMPORARY DISTURBANCES ASSOCIATED WITH INCIDENTAL UTILITY CONSTRUCTION, RESTORATION OPERATIONS, OR MANAGEMENT OF NUISANCE VEGETATION). THE CONSERVED OPEN SPACE AREA SHALL NOT BE STRIPPED OF TOPSOIL. THE LIMITS OF THE CONSERVED OPEN SPACE SHOULD BE PROTECTED DURING CONSTRUCTION BY ACCEPTABLE SIGNAGE AND EROSION CONTROL MEASURES. GRASSED AREAS MAY BE MOWED A MAXIMUM OF 4 TIMES A YEAR. A LONG TERM VEGETATION MANAGEMENT PLAN MUST BE PREPARED TO MAINTAIN THE CONSERVED OPEN SPACE IN A NATURAL VEGETATIVE CONDITION. GENERALLY, CONSERVED OPEN SPACE MANAGEMENT PLAN DO NOT ENCOURAGE OR EVEN ALLOW ANY ACTIVE MANAGEMENT. HOWEVER, A SPECIFIC PLAN SHOULD BE DEVELOPED TO MANAGE THE UNINTENDED CONSEQUENCES OF PASSIVE RECREATION, CONTROL INVASIVE SPECIES, PROVIDE FOR TREE AND UNDER -STORY MAINTENANCE, ETC. MANAGED TURF IS NOT CONSIDERED AN ACCEPTABLE FORM OF VEGETATIVE MANAGEMENT, AND ONLY THE PASSIVE RECREATION AREAS OF DEDICATED PARKLAND ARE ELIGIBLE FOR THE PRACTICE, ALTHOUGH CONSERVATION AREAS CAN BE IDEAL TREATMENT PRACTICES AT THE EDGE OF TURF -INTENSIVE LAND USES. CONSERVED OPEN SPACE MUST BE PROTECTED BY A PERPETUAL EASEMENT OR DEED RESTRICTION THAT ASSIGNS THE RESPONSIBLE PARTY TO ENSURE THAT NO FUTURE DEVELOPMENT, DISTURBANCE, OR CLEARING EMBANKMENT NOTES: 1. FILL MATERIAL SHALL BE FREE OF ORGANIC MATERIALS, CONSTRUCTION WASTE, STONES GREATER THAN 6-IN IN DIAMETER, AND OTHER OBJECTIONABLE MATERIAL. CENTER OF THE EMBANKMENT SHALL CONFORM TO. UNIFIED SOIL CLASSIFICATION GC, SG, OR CL ("IMPERVIOUS CORE", AS DEPICTED IN EMBANKMENT CROSS-SECTION, THIS SHEET). 2. FILL SHALL BE PLACED IN LIFTS NO GREATER THAN 8", WHICH SHOULD EXTEND THE ENTIRE LENGTH OF THE EMBANKMENT. THE MOST PERMEABLE BORROW MATERIAL SHALL BE PLACED IN THE DOWNSTREAM PORTIONS OF THE EMBANKMENT. 3. FILL MATERIAL SHALL BE COMPACTED WITH APPROPRIATE EQUIPMENT WHILE THERE IS A SUITABLE MOISTURE CONTENT IN MATERIAL TO ACHIEVE 95% COMPACTION. 4. THE SURFACE LAYER OF COMPACTED FILL SHALL BE SCARIFIED PRIOR TO PLACEMENT OF TOP SOIL TOP SOIL SHALL BE STABILIZED WITH SEED UPON ACHIEVEMENT OF FINAL GRADE. 5. EMBANKMENT SHALL INCLUDE A CUTOFF TRENCH LOCATED ALONG CENTERLINE, MEASURING A MINIMUM OF 4'-WIDE AND 4'-DEEP (SEE EMBANKMENT CROSS-SECTION, THIS SHEET). 6. ALBEMARLE COUNTY REQUIRES A PE CERTIFICATION THAT ITEMS SPECIFIED IN NOTES 1-5 ABOVE WERE MET BY AND DURING CONSTRUCTION. 1W V VA-DEQ EMBANKMENT CORE SOIL SPECIFICATIONS PROPERTY TEST METHOD UNIT SPECIFICATION 3WIDE PERMEABILITY ASTM D-2434 CM/SEC 1 X 10"(-6) FILTER PLASTICITY INDEX OF CLAY ASTM D-423/424 % NOT LESS THAN 15 3" LAYER FABRIC LIQUID LIMIT OF CLAY ASTM D-2216 % NOT LESS THAN 30 WASHED STONE CLAY PARTICLES PASSING ASTM D-422 % NOT LESS THAN 30 CLAY COMPACTION ASTM D-2216 % 95% OF STANDARD PROCTOR DENSITY RISER CONVERSION NOTES UPON PERMANENT STABILIZATION OF SITE AND APPROVAL FROM COUNTY EROSION AND SEDIMENT CONTROL ADMINISTRATOR, CONTRACTOR IS TO CONVERT SEDIMENT BASIN RISER TO DETENTION BASIN CONFIGURATION THROUGH THE FOLLOWING PROCESS: . SEDIMENT BASIN WET STORAGE TO BE DEWATERED USING APPROVED EFFLUENT FILTERING PRACTICES. • REMOVE SEDIMENT AND OTHER DEBRIS TO ESTABLISH FINAL GRADE OF THE DETENTION BASIN. MATERIAL REMOVED 6% 6" SHALL BE REMOVED TO A CONTAINED SPOIL AREA. 12" MIN. THICKNESS TREATED SEED AREAS OF BASIN DISTURBED BY SEDIMENT REMOVAL PRACTICES. OF RIP RAP ON TIMBERS W/ ' PLUG/SEAL SEDIMENT BASIN ORIFICE BOTTOM AND • OPEN PERMANENT ORIFICES & INSTALL LOW FLOW FILTER. SIDES, TYP. #5 REBAR INSTALL PERMANENT TRASH RACKS & ANTI —VORTEX PLATE. • ADJUST RISER RIM ELEVATION TO DETENTION BASIN ELEVATION. • FINAL MODIFICATIONS TO THE RISER STRUCTURE_ SHALL BE INSPECTED FOR WATER TIGHT CONNECTIONS.. H � 1 SETH R DERICK 9 Lic. o. 041454 w 0.l Sept 9, 2020 4� g O co z�oo� CV O Q �OZSC:)(o UJ O Q UZ�Lcr,)) 4I� 00 J C/) No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 Stormwater Management 9 01 2020 11 Stormwater Management 9 09 2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION ENLARGED DETENTION BASIN #1 Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR , C-6.041 9, 48" RISER WITH TRASH RACK & ANTI -VORTEX PLATE EMBANKMENT 24" CMP OUT: 864.00' TWO 8" ORIFICES: 864.00' CREST: MIN RISER CREST: 871.50' TOP WIDTTHH ' 2D` EMERGENCY SPILLWAY: 872.50' — 20' WIDTH III —III- _ 18" CMP WITH F.E.S. 95 ET 1.0% III = INV IN : 864.00' IIIIII—III- 3:1 SIDE SLOPES IIIIIIIII� I INV OUT: 863.05' � I I III III III III BOTTOM POOL ELEV.: 864.00' RIP RAP OUTLET PROTECTION III III III III[LaD50 — 6' —III = 15' III —III III III III � Wo 6' IIIIIIIIIIIIIIIIII� - W — 17 III III III III III III III II III III (ANTI —FLOATATION BASE IIII IIIIIIIIIIIIIIIIIIIIIIII II � IIIIIIIIIIIIIII� I I� I I� I I� I I� I I —III; IIIIIIIIIIIIIII—III;I— II III — —III III III III II III III III III III III —III —IIII IIII ,III I III III II III �� III 0 _ _ DETENTION BASIN _T2 SECTION (NOT TO SCALE) I I I l PROJECT LIMITS STORMWATER DETENTION POND ##2 I 1 SIDE SLOPES yo/Trf��Tl m o rn 0 00 a as 00 O / 00 TENTION BASIN 2 EMERGENCY SPILLWAY / I 0 r °p n I .°I ol/////,0/ PROTECTION I D50 = 6„ La = 15' Wo = 6' I W = 17PR $65 N '61 A / I I / I I EXIST36G CULVERT I I INV IN .3 INV OUT—8842.1 \ i GRADING NOTES: • WORK EXCEEDS SURVEY LIMITS. CONTRACTOR TO ENSURE REASONABLE TYING OF GRADES. LESS THAN 40' RADIUS \ � I 1 3:1 SIDE SLOPES IL, 1 DETENTION BASIN ##2 ACCESS @ 12.5% SLOPE L FA ROAD TO FOLLOW EXISTING ROADBED & GRADE • • a • 15 • 30 •/ I -RELATIVELY .IMPERV14U5 CORE I C SC :C.L SOILS ON ) IMPERVIOUS OR IMPERVIOUS OR SEMI -PERVIOUS SEMI -PERVIOUS SHOULDER SHOULDER CLEARED GROUND LEVEL CFlTOFF . 4' min. }� I I 4' min. CONCRETE BLOCK WIDTH - PIPE DIA. X 2 TYPICAL CONCRETE BASE SOURCE: VA. DSWC /PROJECT LIMITS — —e B55 i STEEL PLATE THICKNESS = 0.25" MIN STEEL PLATE WIDTH = PIPE DIA. X 2 TYPICAL STEEL BASE PLATE. 3.14-3 BMP OPERATION AND MAINTENANCE PLAN LANDOWNERS (CURRENT AND FUTURE) OF HILLCREST VINEYARD LOCATED AT 8585 DICK WOODS RD. AFTON, VA. OR DESIGNATED AGENT SHALL BE RESPONSIBLE FOR THE MAINTENANCE OF THE BMPS LOCATED ON SITE. THE STORMWATER MANAGEMENT PLAN CONSISTS OF DEDICATED FOREST AND OPEN SPACE EASEMENT AND AN EXISTING FARM POND. NUTRIENT MITIGATION REQUIREMENTS FOR THIS PROJECT ARE MET THROUGH 26 ACRES DEDICATED OPEN SPACE. CHANNEL PROTECTION AND FLOOD PROTECTION REQUIREMENTS ARE MET THROUGH STORMWATER DETENTION BASINS. THE STORM SYSTEM WILL COLLECT STORMWATER RUNOFF FROM THE BUILDINGS ROOF LEADERS AND PARKING AREA AND CONVEY STORMWATER TO A NEW DETENTION POND. THE PONDS WILL RELEASE THE WATER THROUGH A RISER AND SPILLWAY STRUCTURE AT OR LESS THAN PRE —DEVELOPMENT FLOWRATES THAT MEET ENERGY BALANCE REQUIREMENTS. 1.1. MAINTENANCE AGREEMENTS THE VIRGINIA STORMWATER MANAGEMENT REGULATIONS 4 VAC 50-60 SPECIFY THE CIRCUMSTANCES UNDER WHICH A MAINTENANCE AGREEMENT MUST BE EXECUTED BETWEEN THE OWNER AND THE VSMP AUTHORITY, AND SETS FORTH INSPECTION REQUIREMENTS, COMPLIANCE PROCEDURES IF MAINTENANCE IS NEGLECTED, NOTIFICATION OF THE LOCAL PROGRAM UPON TRANSFER OF OWNERSHIP, AND RIGHT —OF —ENTRY FOR LOCAL PROGRAM PERSONNEL. • RESTRICTIVE COVENANTS OR OTHER MECHANISM ENFORCEABLE BY THE VSMP AUTHORITY MUST BE IN PLACE TO HELP ENSURE THAT STORMWATER MANAGEMENT STRUCTURES ARE MAINTAINED, AS WELL AS TO PASS THE KNOWLEDGE ALONG TO ANY SUBSEQUENT PROPERTY OWNERS. • ACCESS TO STORMWATER MANAGEMENT STRUCTURES SHOULD BE COVERED BY AN EASEMENT TO ALLOW ACCESS BY THE VSMP AUTHORITY TO CONDUCT INSPECTIONS AND PERFORM MAINTENANCE WHEN NECESSARY. • ALL STORMWATER MANAGEMENT STRUCTURES MUST INCLUDE A LONG TERM MAINTENANCE AGREEMENTS CONSISTENT WITH THE PROVISIONS OF THE VSMP REGULATIONS, AND MUST INCLUDE THE RECOMMENDED MAINTENANCE TASKS AND A COPY OF AN ANNUAL INSPECTION CHECKLIST. • THE MAINTENANCE AGREEMENT SHOULD ALSO INCLUDE CONTACT INFORMATION FOR OWNERS TO GET LOCAL OR STATE ASSISTANCE TO SOLVE COMMON NUISANCE PROBLEMS, SUCH AS MOSQUITO CONTROL, GEESE INVASIVE PLANTS VEGETATIVE MANAGEMENT AND BEAVER REMOVAL. 9.1. MAINTENANCE INSPECTIONS MAINTENANCE OF STORMWATER MANAGEMENT STRUCTURES IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE STRUCTURE, INCLUDING THE FOLLOWING: • MEASURE SEDIMENT ACCUMULATION LEVELS IN FOREBAY. • MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES. • INSPECT THE CONDITION OF STORMWATER INLETS TO THE STRUCTURE FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. • INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. • INSPECT STRUCTURE OUTFALL FOR EROSION, UNDERCUTTING, RIP —RAP DISPLACEMENT, WOODY GROWTH, ETC. • INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION, ETC. • INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION, ETC. • INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. • INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE STRUCTURE FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY. • BASED ON INSPECTION RESULTS, SPECIFIC MAINTENANCE TASKS WILL BE TRIGGERED. EXAMPLE MAINTENANCE INSPECTION CHECKLISTS FOR STORMWATER MANAGEMENT STRUCTURES CAN BE ACCESSED IN APPENDIX C OF CHAPTER 9 OF THE VIRGINIA STORMWATER MANAGEMENT HANDBOOK (2010). FACILITY MAINTENANCE ACTIVITIES: STORMWATER MANAGEMENT STRUCTURES INSPECTIONS AND SPOT CHECKS:THE OWNERS, DESIGNATED AGENT OR CONTRACTED MAINTENANCE WILL INSPECT AND CERTIFY THE STORMWATER MANAGEMENT STRUCTURES AND ASSOCIATED STORM SYSTEM ON THE INDIVIDUAL PROPERTY CONTINUE TO FUNCTION AS DESIGNED AND INSTALLED. INSPECTION FINDINGS SHALL BE DOCUMENTED IN DETAIL WITH NOTES AND PHOTOS IN THE PROJECT FILE. THE INSPECTOR SHALL PROVIDE WRITTEN NOTIFICATION TO THE LANDOWNERS AND DESIGNATED AGENT OF THE ANNUAL INSPECTION AND FINDINGS. THE OWNERS/DESIGNATED AGENT SHALL BE RESPONSIBLE FOR REMEDYING ANY DEFICIENCIES FOUND. REMOVE BLOCKAGES FROM INFLOW STRUCTURES: ANY TRASH OR DEBRIS THAT IS BLOCKING OR IMPEDING OPERATION OF AN INFLOW STRUCTURE AND/OR FOREBAY SHALL BE REMOVED. IN ADDITION, LANDSCAPE TRIMMINGS SHALL BE PROPERLY DISPOSED OF TO PREVENT CLOGGING BY THE VEGETATIVE DEBRIS. BLOCKAGES HAVE THE ABILITY TO RAISE THE DESIGN WATER LEVEL IN THE FACILITY. BE AWARE OF POTENTIAL SOURCES OF ILLICIT DISCHARGES WITHIN THE DEBRIS. IF THE BLOCKAGE REQUIRES PHYSICAL ENTRY INSIDE THE STRUCTURE, PLEASE OBSERVE ANY CONFINED SPACE REQUIREMENTS. REMOVE BLOCKAGES FROM OUTFLOW STRUCTURES ANY TRASH OR DEBRIS, EITHER NATURAL OR "MAN MADE THAT IS BLOCKING OR IMPEDING OPERATION OF AN OUTFLOW STRUCTURE SHALL BE REMOVED SO THAT THE OUTFLOW IS FULLY FUNCTIONAL AGAIN BLOCKAGES HAVE THE ABILITY TO RAISE THE DESIGN WATER LEVEL IN THE FACILITY. BE AWARE OF POTENTIAL SOURCES OF ILLICIT DISCHARGES WITHIN THE DEBRIS. IF THE BLOCKAGE EXTENDS INTO THE OUTLET STRUCTURE REQUIRING PHYSICAL ENTRY INSIDE THE STRUCTURE PLEASE OBSERVE ANY CONFINED SPACE REQUIREMENTS REMOVE ACCUMULATED SEDIMENT > 5 ALL FACILITY INLETS BASINS, SUMPS PIPES, AND STORMWATER STORAGE AREAS SHALL BE CLEANED OF SEDIMENT TO RETURN THE AREA TO ORIGINAL DESIGN GRADES AND ENSURE FUNCTIONALITY. SEDIMENT SHALL BE DISPOSED OF IN ACCORDANCE WITH LOCAL, STATE AND FEDERAL REQUIREMENTS. CARE SHALL BE TAKEN TO MINIMIZE THE EXTENT OF ANY LAND DISTURBANCE AND TO LEAVE THE SITE IN NONEROSIVE PRE —MAINTENANCE CONDITION. OPERATIONS SHALL FOLLOW ANY STATE AND/OR CITY ESC STANDARD AND NUTRIENT MANAGEMENT PLAN. TO PREVENT FUTURE SEDIMENTATION, THE SOURCES MUST BE IDENTIFIED AND REMEDIED. REPAIR EROSION: THIS INCLUDES UPLAND DRAINAGE AREAS THAT MAY BE CONTROLLABLE SOURCES OF SEDIMENT OR EROSION. EROSION CAN CONTRIBUTE TO SEDIMENTATION IN THE BASIN AND ALSO MAY WEAKEN THE STRUCTURE, DEPENDING ON ITS SEVERITY AND LOCATION. EROSION SHALL BE CORRECTED BY SEEDING, GRADING, AND/OR INSTALLATION OF SOIL STABILIZATION MATTING TO CORRECT THE DEFICIENCY. VEGETATED OPEN SPACE NO MAJOR DISTURBANCE MAY OCCUR WITHIN THE CONSERVED OPEN SPACE DURING OR AFTER CONSTRUCTION (IE., NO CLEARING OR GRADING IS ALLOWED EXCEPT TEMPORARY DISTURBANCES ASSOCIATED WITH INCIDENTAL UTILITY CONSTRUCTION, RESTORATION OPERATIONS, OR MANAGEMENT OF NUISANCE VEGETATION). THE CONSERVED OPEN SPACE AREA SHALL NOT BE STRIPPED OF TOPSOIL. THE LIMITS OF THE CONSERVED OPEN SPACE SHOULD BE PROTECTED DURING CONSTRUCTION BY ACCEPTABLE SIGNAGE AND EROSION CONTROL MEASURES. GRASSED AREAS MAY BE MOWED A MAXIMUM OF 4 TIMES A YEAR. A LONG TERM VEGETATION MANAGEMENT PLAN MUST BE PREPARED TO MAINTAIN THE CONSERVED OPEN SPACE IN A NATURAL VEGETATIVE CONDITION. GENERALLY, CONSERVED OPEN SPACE MANAGEMENT PLAN DO NOT ENCOURAGE OR EVEN ALLOW ANY ACTIVE MANAGEMENT. HOWEVER, A SPECIFIC PLAN SHOULD BE DEVELOPED TO MANAGE THE UNINTENDED CONSEQUENCES OF PASSIVE RECREATION, CONTROL INVASIVE SPECIES, PROVIDE FOR TREE AND UNDER —STORY MAINTENANCE, ETC. MANAGED TURF IS NOT CONSIDERED AN ACCEPTABLE FORM OF VEGETATIVE MANAGEMENT, AND ONLY THE PASSIVE RECREATION AREAS OF DEDICATED PARKLAND ARE ELIGIBLE FOR THE PRACTICE, ALTHOUGH CONSERVATION AREAS CAN BE IDEAL TREATMENT PRACTICES AT THE EDGE OF TURF —INTENSIVE LAND USES. CONSERVED OPEN SPACE MUST BE PROTECTED BY A PERPETUAL EASEMENT OR DEED RESTRICTION THAT ASSIGNS THE RESPONSIBLE PARTY TO ENSURE THAT NO FUTURE DEVELOPMENT, DISTURBANCE, OR CLEARING MAY OCCUR WITHIN THE AREA. EMBANKMENT NOTES: 1. FILL MATERIAL SHALL BE FREE OF ORGANIC MATERIALS, CONSTRUCTION WASTE, STONES GREATER THAN 6—IN IN DIAMETER, AND OTHER OBJECTIONABLE MATERIAL. CENTER OF THE EMBANKMENT SHALL CONFORM TO UNIFIED SOIL CLASSIFICATION GC, SC, OR CL ("IMPERVIOUS CORE AS DEPICTED IN EMBANKMENT CROSS—SECTION, THIS SHEET). 2. FILL SHALL BE PLACED IN LIFTS NO GREATER THAN 8", WHICH SHOULD EXTEND THE ENTIRE LENGTH OF THE EMBANKMENT. THE MOST PERMEABLE BORROW MATERIAL SHALL BE PLACED IN THE DOWNSTREAM PORTIONS OF THE EMBANKMENT. 3. FILL MATERIAL SHALL BE COMPACTED WITH APPROPRIATE EQUIPMENT WHILE THERE IS A SUITABLE MOISTURE CONTENT IN MATERIAL TO ACHIEVE 95% COMPACTION. 4. THE SURFACE LAYER OF COMPACTED FILL SHALL BE SCARIFIED PRIOR TO PLACEMENT OF TOP SOIL. TOP SOIL SHALL BE STABILIZED WITH SEED UPON ACHIEVEMENT OF FINAL GRADE. 5. EMBANKMENT SHALL INCLUDE A CUTOFF TRENCH LOCATED ALONG CENTERLINE, MEASURING A MINIMUM OF ID A EP S .B K N C S —S CT N TH S E ALBEMARLE OUNTY REQUIR S P C RTI ICA 10 T AT ITE S PE IFIE N TES 1-5 A 0 RE MET BY AND DURING CONSTRUCTION. VA—DEO EMBANKMENT CORE SOIL SPECIFICATIONS PROPERTY TEST METHOD UNIT SPECIFICATION PERMEABILITY ASTM D-2434 CM/SEC 1 X 10^(-6) PLASTICITY INDEX OF CLAY ASTM D-423/424 % NOT LESS THAN 15 LIQUID LIMIT OF CLAY ASTM D-2216 % NOT LESS THAN 30 CLAY PARTICLES PASSING ASTM D-422 % NOT LESS THAN 30 CLAY COMPACTION ASTM D-2216 % 95% OF STANDARD PROCTOR DENSITY V (WR ED)SETHERICK1454 wry Sept SS1ONA1, 4, 20?.0 r.2: �11111 g O Co ECi z�oo� N �OZSQ)Q) UJ LL co 00 J C/) No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 Stormwater Management 9 01 2020 11 Stormwater Management 9 D9 2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION ENLARGED DETENTION BASIN #2 Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR C-6.042 8 L TABLE OF DIMENSIONS AND QUANTITIES - 48" DIAMETER RISER rods - 3/4" dia Baffle Plate rods = 3/4" dia rods - 5/8" dia rods - 1/2" dia. H (In.) I R (In) I X (in.) I Y (in.) S 1 0 (in.) Total (Lg.) I No. Req'd I N (In.) I M (In.) L I P I F I V No. Req'd r (In.) Length (In.) No. Req'd r (In.) Length (In.) No. Req'd r (In.) Length (In.) 27 25 3/4 29 3/4 51 1/2 2 57 1/2 127 1/2" 22 17 1/8 8 120" 48" 38" 19" 3 53 333 1 24 151 2 25 3/8 160 A� 1/2" DIE. Cost Lug Fasteners Steel Anti Vortex Baffle Minimum �� Thickness 10 Ga. Perpendicular To \\ Centerline Of Fill a eO rods - 3/4" dia. Top Plate No. Req'd r (In.) Length (In.) pia. (In.) Y 35 220 6 FABRICATION NOTES of LT J S 1. Weld 3 ©,© and e) rods to a) rods and weld a0 LL A r 1r rods to top plate. o 2. The trash rack may be fabricated in identical halves and Q e m attached to the baffle plate with 1/2 inch diameter U bolts 5/8" Steel b s 1" radius spaced approximately 12 inches C-C along the vertical 0 - Top Plate c and inclined sections of the Q rods next to the baffle Z < ��� plate. 11� N (Spacing At d �I 3. Trash rack to be fabricated from smooth round steel bars 1" radius - NL LLJ F Extremity Of Rods) 1�iM conforming ASTM designation to re U w CONSTRUCTION 4. Surface Preparation: Use solvent to remove any oil, grease a Q (Spacing At Pipe) DIAGRAM or other soluble contaminants from the surface. After � Q x solvent cleaning, sand or grit blast to remove dirt, rust mill = 0 FOR (a) RODS scale and other foreign material or residue. a Bar Modification 5. Painting: A two coats of point as follows One coat of w ne PLAN � 9 Apply p Q= Steel Anti -Vortex L Baffle, Minimum Thickness 10 Ga. F 5/8" Steel Top Plate 11 0 ' xe.l s Fill Slope b 4"f N )Rod 1/2" Did. c With Threaded Ends And 1/2" DID. Cast Lug X Pipe 48" O.D. Fasteners SECTIONAL ELEVATION A -A BENDING DIAGRAM Epoxy Polyamide Primer and one coat of Epoxy Polyamide El" FOR RODS Finish. F 6. Outside diameter of riser is 48 inches. Allow 1/4 inch _J clearance for ease of installation. Q 00 U_ Drill 5/16" Did Hole And Insert Z 1/4" Dia. Galvanized Bolt, Lock Washer And Nut As Retainer For 7/8" Did. Pipe 5/8" Steel 1/2" Dia. Cast ° 0 w a2 5 Top Plate Lug Fastener Anti -Vortex in E y w aJ1 Baffle Plate W n U uN Cut @Bar ae�� oa\D, Doc 0o 7/8" Did. Weld 7/8" DIE. Pipe �05 az o°1c m To @ Bar As Shown \ems r.. L Pipe m Cut @Bar ` c Is Bar BOO ZC) QCD BAR MODIFICATION BENDING DIAGRAM BENDING DIAGRAM R„I (OPTIONAL) FOR d RODS FORn (c)&CeTRODS ILL•-EENG-72 CMP RISER WITH TRASH RACK & TI-VORTEX PLATE 3ER CREST: 1076.70' U/ a ORIFICE 6.0' 1071.40' a CMP 1070.40' 'VC FROM LOW FLOW FILTER 1070.40` d RFICE DRILLED THROUGH ADED PVC PIPE PLUG 1070.50' ANTI -FLOATATION BASE 1,5' 0 3.0, I 1 6" PVC @ 2% d INV: 1070.40' 2" ORIFICE DRILLED THROU a THREADED PVC PIPE PLUG INV: 1070.50' da 36" CMP RISER 18" CMP @ 1 % N V: 1070.40' MAINTNANCE ACCESS BY PORTABLE LADDER, NOT PERMANENT STEPS DETENTION BASIN #1 RISER STRUCTURE PLAN / PROFILE DETAIL NOTE: DET. BASIN #1 RISER STRUCTURE, INCLUDING BASE AND TRASH RACK, TO BE PRESERVED FROM SEDIMENT BASIN APPLICATION AND CONVERTED ACCORDING TO'RISER CONVERSTION NNOTES' FROM SHEET C-6.041R. SH SHAPE TO ELEVATION. OF MID -POINT OF LARGEST PIPE. h ..n SLOPE TO DRAIN TO INVERT OF OUTLET PIPE -CTION A -A )F TREATMENT IN DROP INLETS SLOPE TO DRAIN TO INVERT OF OUTLET "PE 4 )• DETAILS OF INVERT SHAPING AS SHOWN HEREON PRE FOR EXAMPLE PURPOSES ONLY. EACH MANHOLE AR DROP INLET IS TO BE SHAPED , ONFI URATI TO BEST FIT THE PARTICULAR INLET AND OUTLET CONFIGURATION AND Flow LINES. SECTION B-B PLAN METHOD OF TREATMENT IN MANHOLES SPEQFl ATMN REFERENCE STANDARD METHOD OF SHAPING MANHOLE & INLET INVERTS 392 VIRGINIA DEPARTMENT OF TRANSPORTATION [DO s.68 ST-1 3D i'e/e' R. TYPICAL SECTION (DIMENSIONS MAY .VARY WITH MANUFACTURER'S DESIGN) GALVANIZED STEEL STEP 2016 ROAD & BRIDGE STANDARDS PI-1 STANDARD GUARDRAIL ASPHALT CONCRETE CURB BACK-UP MATERIAL NOTE 11 DI-13 DROP INLET PAVED SHOULDER l5E'E PAVEMENT 25,c-c4 SEE NOTE 8 M,P�I i 2' MIN. / NOTES: 1. CORRUGATED TWO PIECE COUPLING BANDS AND 2 ANCHOR GUY STANDARD EW-1 SCREWS (INSTALLED 6' FROM THE STRUCTURE) ARE REQUIRED ENDWALL //j /j FOR EACH DI-13 STRUCTURE INSTALLATION. (SEE DI-13 STANDARD) 2. ANCHOR GUY SCREWS WILL HAVE THE FOLLOWING DIMENSIONS SEE NOTE 9 �� % 174/ 1//� / 3/d' ROD DIAMETER X LENGTH, WITH A 6" DIAMETER HELIX. THE ANCHOR GUY SCREWSEWS AND COUPLING BANDS WILL BE // SEE NOTE 2 GALVANIZED IN ACCORDANCE WITH SECTION 233 OF THE SEE NOTE 3 SPECIFICATIONS. 3. REQUIRED 15'' CORRUGATED PIPE. SEE PLAN FOR LINEAR FOOT 2 ANCHOR GUY SCREWS QUANTIFIES. THE LINEAR FOOT COST FOR THE PIPE WILL REQUIRED FOR EACH INCLUDE FURNISHING AND PLACING COUPLINGS AND ANCHOR GUYS. REQUIRED CORRUGATED TWO GUYS. BENT JOINT PIECE PIPE COUPLING COUPLING BAND BANDS WITH ANGLES 4. CORRUGATED POLYETHYLENE PIPE MAY BE USED AS AN ALTERNATE ONLY IF GALVANIZED METAL COUPLING BANDS ARE METHOD I USED AND CAN BE SECURED TO THE PIPE AND REQUIRED ANCHOR GUY SCREWS. THE METHOD WILL REQUIRE A SUBMITTAL TO THE ENGINEER FOR REVIEW AND APPROVAL PRIOR TO INSTALLATION. 5. THE 15" CORRUGATED PIPE WILL BE TERMINATED AT THE TOE OF FILL SLOPE WITH AN APPROPRIATE END TREATMENT. FOR G'G SLOPES STEEPER THAN 3�1 (MAX. 1.5:1) THE 15' PIPE WILL BE TERMINATED IN ACCORDANCE WITH METHOD I. FOR SLOPES M 31 AND FLATTER THE PIPE MAY BE TERMINATED IN O ACCORDANCE WITH METHOD II INSTEAD OF METHOD I. tiS �P,A, SEE NOTE 3 (SEE PLANS FOR REQUIRED TYPE OF STRUCTURE) STANDARD 6. PIPE BEDDING. SHALL NOT BE USED, ES-2 END SECTION METHOD METHOD I: TERMINATE PIPE WITH A STANDARD ENWALL OR OTHER DRAINAGE STRUCTURE ASBY CORRUGATED TWO 7 ENGINEER. FOR PPEAILED LENGTHSIN 50 PFT. AND RLONGER MDIRECTEEASUREDE FROM PIECE PIPE COUPLING THE BACK OF DI-13 INLET, COUPLING BANDS WITH ANCHOR GUYS BANDS WITH ANGLES ARE TO BE USED AT 25' C-C MAXIMUM SPACING. S. WHEN THE SPACING OF THE LOWEST COUPLING FALLS CLOSER THAN 25 FT. TO THE RECEIVING STRUCTURE AT THE TOE OF SLOPE, REQUIRED THAT DISTANCE IS TO BE ADDED TO THE LAST FULL 25' SPACE AND BENT JOINT 2 ANCHOR GUY SCREWS THE COUPLING IS TO BE SPACED MID -WAY OF THE COMBINED DISTANCE. REQUIRED FOR EACH COUPLING BAND 9, IF A PRECAST STRUCTURE IS USED THE PIPE WILL BE CONNECTED TO THE WALL IN ACCORDANCE WITH SECTION 302 OF THE METHOD SPECIFICATIONS. METHOD II: 10 TERMINATE PIPE WITH A STANDARD ES-2 END SECTION ANCHORED WITH COUPLING BAND AND ANCHOR GUYS FOR PIPE LENGTHS 50 FT. AND LONGER MEASURED FROM THE BACK OF DI-13 INLET, COUPLING BANDS WITH ANCHOR GUYS ARE TO BE USED AT 25' C-C MAXIMUM SPACING. `VDIOT A COPY OF THE ORIGINAL SEALED AND SIGNED DRAWING IS ON FILE IN THE CENTRAL OFFICE. SPECIFICATION ROAD AND BRIDGE STANDARDS METHOD OF OUTLET PIPE INSTALLATION FOR DI-1.3 REFERENCE SHEET 1 OF 1 REVISION DATE VIRGINIA DEPARTMENT OF TRANSPORTATION 232 104.37 04/20 2016 ROAD & BRIDGE STANDARDS 303 8" MH-1 RISER WITH TRASH RACK & NTI-VORTEX PLATE ISER CREST: 871.50' MEETING MANHOLE STEPS STANDARD Q 6.0' a P 34.00' d a 8" ORIFICES 864.00' 6'X6'X1ft" CON(RFTF ANTI -FLOATATION BASE 1.5' en 4 Q TEMPORARY CULVERT CR O S SING CAPACITY OF PIPE CULVERTS VDOT #1 COARSE AGGREGATE 6" DEEP TOGETHER = FLOW 1/2 DIAMETER \ EARTH FILL COVERED WHICHEVER IS OF PIPE OR 12 EARTH BY LARGE ANGULAR ROCK GREATER �� L b III -II III 1 II I��III 1\ i I FILTER CLOTH _J- IIII Till =1-u IJ a '- u I llll li ELEVATION FLOW Ij I 1 VDGT AGGREGATE COARSE ROCKEARTH FILLERRGE SWG 48" MH-1 RISER G d d 18" CMP @ 1% NV: 864.00' DETENTION BASIN #2 RISER STRUCTURE PLAN / PROFILE DETAIL #4, GRADE 50, REINFORCING ROD ENCASED IN A CORROSION RESISTANT RUBBER OR OTHER MATERIAL APPROVED BY THE ENGINEER. (DIMENSION MAY VARY WITH MANUFACTURER'S DESIGw CORROSION RESISTANT I FA MATERIAL #4 REINFORCING ROD L SECTION Y I NOTES STEPS WILL BE REQUIRED IN ALL STRUCTURES WITH A DEPTH OF _ 4'-O" OR GREATER UNLESS OTHERWISE NOTED ON THE PLANS. • 4/2 �' ALL STEPS SHALL PROTRUDE 41/2FROM INSIDE FACE OF STRUCTURE WALL. MAXIMUM STEP SPACING TO BE 16' C-C. STEPS SHALL WITHSTAND A MINIMUM FORCE OF 300 POUNDS WHEN EXTENDED 41/2 FROM THE FACE OF THE SUPPORT. STEPS ARE TO BE VERTICALLY ALIGNED AND UNIFORMALY SPACED FOR THE ENTIRE DEPTH OF ANY STRUCTURE. PRECAST UNITS STEPS MAY. BE CAST IN PLACE,MORTARED IN NTO HOLES PROVIDED BY THE FABRICATOR, OR DRIVEN. 8 MINIMUM OF 3" EMBEDMENT STEPS DIFFERING IN DIMENSIONS, CONFIGURATION, OR MATERIALS FROM THOSE SHOWN MAY ALSO BE USED PROVIDED THEY MEET THE MINIMUM REQUIREMENTS SHOWN HEREON AND THE CONTRACTOR HAS FURNISHED THE ENGINEER WITH DETAILS AND CERTIFIED TEST REPORTS OF THE PROPOSED SUBSTITUTE AND HAS 1�1 RECEVED WRITTEN APPROVAL FROM THE ENGINEER FOR THE USE OF SUCH STEPS. 3 ALL STEPS INSTALLED SHALL BE PROVIDED WITH SLIP -RESISTANT SURFACES SUCH AS BUT NOT LIMITED TO, CORRUGATED KNURLED, OR DIMPLED SURFACES. ALUMINUM STEPS SHALL BE FABRICATED IN ACCORDANCE WITH ASTM 6221, ALLOY 6005-T5. AN THAT PORTION OF THE STEP ENCASED IN MASONRY SHALL BE W� UNIFORMLY COATED WITH A BITUMINOUS, SOLVENT TYPE, ASBESTOS eletV V 9 FILLED ALUMINUM PIGMENTED COATING CONFORMING TO FEDERAL " S SPECIFICATION TC-C-00498A. Y ALUMINUM STEP SPECIFlCAigN STANDARD STEP RITERENCE VIRGINIA DEPARTMENT OF TRANSPORTATION NONE 106„09 HALF PLAN VIEW SEE STANDARAO SL-I FOR APPLICABILITY OF SAFETY SLABS. STANDARD MILT NOTE FRAME & COVER THE TOP OF MASONRY 15 TO BE LEFT SUFF ICIENTLY LOW TO PERMIT PROPER ADJUSTMENT OF COVER AND FRAME TO GRADE BY THE USE OF MORTAR OR ' BRICK AS DIRECTED BY THE ENGINEER. `a V FLAT SLAB TOP AS [ "vd i ON STANDARD SUBSTITUTED FOROR TA TA SECTION WHEN PPPR( THE ENGINEER. srD sT 1 •' HALF SECTION A -A '(WITH FRAME AND COVER REMOVED) �A BRICK CONCRETE a'-D' ^• BEVEL 45' NOTES, pa J 1. QUANTITIES SHOWN ARE FOR MANHOL WITHOUT PSBEEDULA BY PIPES MOT DEDUCTED O SHEET 1 OF 5 2.A BASE THICKNESS OF 9" WAS USED COMPUTING CONCRETE QUANTITIES. 3, INCREMENTS TO BE ADDED FOR EACI ADDITIONAL FOOT OF DEPTH. 4. MATERIALS MAY BE BRICK, CONCRETE APPROVED CONCRETE MANHOLE BLO( 5,IF BLOCKS ARE USED THE MINIMUM THICKNESS OF SAME IS TO BE 5'. OTHER THICKNESSES ARE TO CONED TO WALL THICKNESS SHOWN FOR CONCRETE. 6. ALL CONCRETE TO BE CLASS A3. 7. WHEN SPECIFIED ON PLANS THE INVERT I5 TO BE SHAPED IN ACCORDANCE WITH STANDARD IS-1. THE COST OF FURNISHING AND PLACI ALL MATERIALS INCIDENTAL TO THE SHAPING IS TO BE INCLUDED IN THE PRICE FOR THE STRUCTURE. SPEQHCAD MANHOLE FOR 12'' - 48'' PIPE CULVERTS WEREW1 302 TABLE OF QUANTITIES DEPTH BRICK MANHOLE CONCRETE MANHOLE BRICK CONCRETE CONCRETE FEET THOUSANDS CU, YARDS CU. YARDS 4 0.5 DJ55 1437 5 0.7 0.765 1.699 5 DA 0.785 1.961 7 1 D 0 785 2223 8 1,2 0 785 2,485 9 1.4 0.765 2.747 10 1S 0785 3.009 11 1.9 0970 3455 12 2,2 0.970 3.017 13 2.5 D.970 14 2B 0.970 4.541 IS 3.1 0970 4,903 i6 3.4 5.970 i265 17 4.0 1.173 6.032 INCREMENT 0.45 0,582 W H /1/rG✓� SET R DERICK 9 Lic. o. 041454 wry Sept SS'ONAI 4, 2020 �: CL q O to z�oo� CV O Q o UJ co 00 J C/) = Q No. Description Date 1 County Review Comments 8/02/19 2 County Review Comments 9/19/19 3 County Review Comments 11/06/19 4 County Review Comments 11/21/19 5 County Review Comments 4 9/2020 6 Erosion Control Addendum 6/3/2020 7 Sediment Basin Addendum 6/15/2020 8 Stormwater Management 7/31/2020 9 Stormwater Management 8 07 2020 10 Stormwater Management 9 01 2020 11 Stormwater Management 9 D9 2020 PRELIMINARY ISSUE NOT FOR CONSTRUCTION STORMWATER DETAILS Project number 19004C Date June 21, 2019 Drawn by ETS Checked by SOR C-6.043