HomeMy WebLinkAboutWPO202100031 Plan - VSMP 2021-06-02HENLEY MIDDLE SCHOOL
MODULAR CLASSROOM ADDITION AND RENOVATION
SITE DATA:
TAX MAP PARCEL: 05600-00-00-017AO
LIMITS OF DISTURBANCE: 0.57 ACRES
ZONING: R1 RESIDENTIAL
SETBACK: 75' FRONT
25' SIDE
35' REAR
MAGISTERIAL DISTRICT: WHITE HALL
SOURCE TOPOGRAPHY: TIMMONS GROUP, OCT 2019
DATUM:
HORIZONTAL: NAD83 VIRGINIA STATE GRID SOUTH ZONE
VERTICAL: NAVD88 ESTABLISHED THROUGH LEICA
SMARTNET
BUILDING HEIGHT:
18.33'
BUILDING AREA:
7,750 SF
PROPOSED USES:
MODULAR CLASSROOM ADDITION AND ASSOCIATED SITE WORK
WETLAND IMPACTS: NONE
WATER SUPPLY: PRIVATE
SANITARY SEWER: EXISTING SEWER SYSTEMS
DRAINAGE DISTRICT: LICKINGHOLE CREEK WATER SUPPLY WATERSHED
THERE ARE NO CRITICAL SLOPES LOCATED WITHIN THE PROJECT LIMITS.
THERE ARE NO CONSTRUCTION ACTIVITIES PROPOSED WITHIN THE 100-YR FLOODPLAIN.
THE SITE IS LOCATED IN A WATER SUPPLY PROTECTION DISTRICT.
VSMP PLAN
COUNTY OF ALBEMARLE, VIRGINIA
ALBEMARLE COUNTY PUBLIC SCHOOLS DISTRICT
05/10/2021
691
King Family Vineyards,
Old Trail Golf Club
MOUNTAIN
HARVEST FARMS
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MOUNTAIN VI
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VICINITY MAP
SCALE 111:20001
SITE LOCATION
OWNER:
ALBEMARLE COUNTY SCHOOL BOARD
401 MCINTIRE RD
CHARLOTTESVILLE, VA 22902
CONTACT: JOE LETTERI
TELEPHONE: (434) 975-9340
FAX: (434) 975-9341
ENGINEER OF RECORD:
TIMMONS GROUP
608 PRESTON AVE. SUITE 200,
CHARLOTTESVILLE, VA 22903
CONTACT: JOHNATHAN SHOWALTER, P.E
TELEPHONE: 434-327-1681
JONATHAN.SHOWALTER@TIMMONS.COM
Sheet List Table
Sheet Number
Sheet Title
CO.0
COVER
C1.0
NOTES & DETAILS
C2.0
EXISTING CONDITIONS & DEMOLITION PLAN
C3.0
EROSION & SEDIMENT CONTROL NOTES & DETAILS
C3.1
EROSION & SEDIMENT CONTROL NOTES & DETAILS
C3.2
EROSION & SEDIMENT CONTROL PLAN - PHASE I
C3.3
EROSION & SEDIMENT CONTROL PLAN - PHASE II
C4.0
LAYOUT AND UTILITY PLAN
C5.0
GRADING AND DRAINAGE PLAN
C6.0
STORMWATER MANAGEMENT PLAN
C6.1
STORMWATER CALCULATIONS
TOTAL # OF SHEETS: 11
APPROVED
by the Albemarle County
Community Dev 12opment Department
Date 6 1
SIGNATURE PANEL
APPROVAL DATE
DEPARTMENT OF COMMUNITY DEVELOPMENT
PLANNING & ZONING
ENGINEERING
INSPECTIONS
ARCHITECTURAL REVIEW BOARD
DEPARTMENT OF FIRE AND RESCUE
ALBEMARLE COUNTY SERVICE AUTHORITY
VIRGINIA DEPARTMENT OF TRANSPORTATION
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Lic. No. 040=057151
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ACSA GENERAL WATER & SEWER CONDITIONS
JUNE 27, 2019
1. WORK SHALL BE SUBJECT TO INSPECTION BY ALBEMARLE COUNTY SERVICE AUTHORITY (ACSA) INSPECTORS. THE
CONTRACTOR WILL BE RESPONSIBLE FOR NOTIFYING THE PROPER ACSA OFFICIALS AT THE START OF THE WORK.
2. THE ALBEMARLE COUNTY SERVICE AUTHORITY SHALL HAVE ACCESS TO USE THE AIRSPACE ABOVE THE LOCATIONS OF
CONSTRUCTION FOR THE FLIGHT OF UNMANNED AERIAL VEHICLES FOR THE PURPOSE OF IMAGERY COLLECTION.
3. THE LOCATION OF EXISTING UTILITIES ACROSS THE LINE OF THE PROPOSED WORK ARE NOT NECESSARILY SHOWN ON
THE PLANS AND WHERE SHOWN ARE ONLY APPROXIMATELY CORRECT. THE CONTRACTOR SHALL, ON HIS OWN INITIATIVE,
LOCATE ALL UNDERGROUND LINES AND STRUCTURES AS NECESSARY.
4. ALL MATERIALS AND CONSTRUCTION SHALL COMPLY WITH THE CURRENT EDITION OF THE GENERAL WATER AND SEWER
CONSTRUCTION SPECIFICATIONS, AS ADOPTED BY THE ACSA.
5. DATUM FOR ALL ELEVATIONS SHOWN IN NATIONAL GEODETIC SURVEY.
6. THE CONTRACTOR SHALL BE RESPONSIBLE FOR NOTIFYING MISS UTILITY (1-800-552-7001).
7. ALL WATER AND SEWER PIPES SHALL HAVE A MINIMUM OF THREE AND A HALF (3.5) FEET OF COVER MEASURED FROM THE
TOP OF PIPE, OVER THE CENTERLINE OF PIPE. THIS INCLUDES ALL FIRE HYDRANT LINES, SERVICE LATERALS AND WATER
LINES, ETC.
8. ALL WATER AND SEWER APPURTENANCES ARE TO BE LOCATED OUTSIDE OF ROADSIDE DITCHES.
9. VALVES ON DEAD END LINES SHALL BE RODDED TO PROVIDE ADEQUATE RESTRAINT FOR THE VALVE DURING A FUTURE
EXTENSION OF THE LINE.
10. TREES ARE NOT PERMITTED IN THE ACSA EASEMENT.
11. THE CONTRACTOR SHALL BE RESPONSIBLE TO COMPLY WITH THE NO -LEAD REGULATION REGARDING BRASS FITTINGS
EFFECTIVE JANUARY 4, 2014 (SENATE BILL 3874 WHICH AMENDS THE SAFE DRINKING WATER ACT).
12. THE SEWER LATERAL BEYOND THE CONNECTION AT THE SEWER MAIN SHALL BE PRIVATE. THE SEWER LATERAL STUB -OUT
SHALL UNDERGO THE ACSA LOW-PRESSURE AIR TEST TO SATISFY COUNTY TESTING REQUIREMENTS. VISUAL INSPECTION
OF THE SEWER LATERAL STUB -OUT
SHALL BE WITNESSED BY THE COUNTY BUILDING INSPECTIONS DEPARTMENT. THIS INSPECTION SHALL OCCUR UNDER AN
"OTHER PLUMBING"PERMIT WHICH MUST BE OBTAINED BY THE CONTRACTOR.
13. THE SEWER LATERAL BEYOND THE CONNECTION AT A MANHOLE SHALL BE PRIVATE. VISUAL INSPECTION AND PRESSURE
TESTING OF THE SEWER LATERAL SHALL BE WITNESSED BY THE COUNTY BUILDING INSPECTIONS DEPARTMENT. THIS
INSPECTION SHALL OCCUR UNDER AN "OTHER PLUMBING" PERMIT WHICH MUST BE OBTAINED BY THE CONTRACTOR.
14. THE FIRE SPRINKLER MAIN DOWNSTREAM OF THE GATE VALVE IS PRIVATE. VISUAL INSPECTION AND TESTING OF THE FIRE
SPRINKLER MAIN DOWNSTREAM OF THE GATE VALVE SHALL BE WITNESSED BY THE COUNTY BUILDING INSPECTIONS
DEPARTMENT. THIS INSPECTION SHALL OCCUR UNDER AN "OTHER PLUMBING" PERMIT WHICH MUST BE OBTAINED BY THE
CONTRACTOR.
15. ALL FLUSHING OF FIRE SPRINKLER MAINS SHALL NOT OCCUR UNTIL APPROVAL IS GIVEN BY THE ACSA.
GENERAL CONSTRUCTION NOTES FOR EROSION AND
SEDIMENT CONTROL
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 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 9:00PM.
15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR
ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND
STRUCTURES/IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF 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 APPROVAL 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 APPROVAL BY THE
COUNTY EROSION CONTROL INSPECTOR.
19. MAINTENANCE: ALL MEASURES SHALL BE INSPECTED WEEKLY AND AFTER EACH RAINFALL EVENT. ANY DAMAGE OR
CLOGGING TO STRUCTURAL MEASURES SHALL BE REPAIRED IMMEDIATELY. SILT TRAPS SHALL BE CLEANED WHEN 50% OF
THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS SHALL BE RESEEDED WHEN NECESSARY TO
ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH COLLECT SEDIMENT TO HALF THEIR HEIGHT
MUST BE CLEANED AND REPAIRED IMMEDIATELY.
20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS OF FINAL SITE
STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL
INSPECTOR.
21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WTIHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER
PROTECTION ORDINANCE SECTION 17-204G.)
22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE THE
LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION 17-207B)
GENERALNOTES
1. CONTRACTOR SHALL COORDINATE ALL REQUIREMENTS FOR AS BUILT DOCUMENTATION, AS REQUIRED BY THE
LOCALITY. THIS INCLUDES, BUT IS NOT LIMITED TO, TESTING, INSTALLATION DOCUMENTATION, SURVEY, ETC. ALL
REQUIREMENTS SHALL BE DISCUSSED WITH THE LOCALITY PRIOR TO THE BEGINNING CONSTRUCTION.
2. ALL MATERIALS AND CONSTRUCTION SHALL BE IN ACCORDANCE WITH CURRENT VIRGINIA DEPARTMENT OF
TRANSPORTATION'S SPECIFICATIONS AND STANDARDS.
3. PRIOR TO ANY CONSTRUCTION, THE CONTRACTOR SHALL CONSULT THE ENGINEER AND VERIFY THE APPROVAL OF
THE PLANS BY ALL FEDERAL, STATE AND LOCAL AGENCIES.
3. LAND USE PERMITS (LUP-A) MUST BE OBTAINED FROM THE VIRGINIA DEPARTMENT OF TRANSPORTATION PRIOR TO
BEGINNING ANY CONSTRUCTION WITHIN THE EXISTING STATE MAINTAINED RIGHT OF WAY (INCLUDING ACCESS).
4. VDOT IS TO RECEIVE WRITTEN NOTIFICATION 48 HOURS PRIOR TO COMMENCING WITH INITIAL CONSTRUCTION
ACTIVITIES.
5. THE CONTRACTOR SHALL VERIFY THE ELEVATIONS OF ALL POINTS OF CONNECTION OR PROPOSED WORK TO EXISTING
CURBS, SANITARY LINES, WATERLINES, ETC, PRIOR TO CONSTRUCTION.
6. UPON DISCOVERY OF SOILS THAT ARE UNSUITABLE FOR FOUNDATIONS, SUBGRADES, OR OTHER ROADWAY
CONSTRUCTION PURPOSES, THE CONTRACTOR SHALL IMMEDIATELY CONTACT THE OWNER. THESE AREAS SHALL BE
EXCAVATED BELOW PLAN GRADE AS DIRECTED BY THE OWNER'S REPRESENTATIVE, BACKFILLED WITH SUITABLE
MATERIAL AND COMPACTED IN ACCORDANCE WITH SPECIFICATIONS.
7. ALL STORM SEWER DESIGN AND CONSTRUCTION TO BE IN ACCORDANCE WITH VDOT STANDARDS.
8. ALL STORM SEWER PIPE SHALL BE REINFORCED TONGUE AND GROVE CONCRETE PIPE IN ACCORDANCE WITH
ASTM-C-76. PIPE WITHIN THE RIGHT OF WAY SHALL BE MINIMUM CLASS III OR GREATER IN ACCORDANCE WITH
CURRENT VDOT STANDARDS AND SPECIFICATIONS.
9. IF PRE -CAST UNITS ARE TO BE USED, VDOT SHALL BE NOTIFIED AND THE MANUFACTURER SHALL SUBMIT DRAWING
DETAILS FOR REVIEW. CERTIFICATION AND VDOT STAMP WILL BE REQUIRED ON ALL UNITS.
10. ALL CONCRETE SHALL BE A3-AE (AIR ENTRAINED 3,000 PSI), UNLESS OTHERWISE NOTED.
11. ALL ENTRANCES ARE TO BE DESIGNED AND CONSTRUCTED IN ACCORDANCE WITH CURRENT VDOT STANDARDS.
12. DESIGN CHANGES, SPECIFIED MATERIALS CHANGES AND/OR FIELD CHANGES FROM THE APPROVED PLANS NEED TO
BE RESUBMITTED TO THE ENGINEER PRIOR TO PROCEEDING WITH THE WORK. A LETTER OF EXPLANATION SHALL
ACCOMPANY THE REVISED PLANS AND/OR THE DRAINAGE CALCULATIONS, WHICH MUST BE SUBMITTED AND
APPROVED BY THE ENGINEER.
13. CONTRACTOR SHALL VERIFY LOCATION AND ELEVATION OF ALL UNDERGROUND UTILITIES SHOWN ON PLANS IN AREAS
OF CONSTRUCTION PRIOR TO STARTING WORK. CONTACT ENGINEER IMMEDIATELY IF LOCATION OR ELEVATION IS
DIFFERENT FROM THAT SHOWN ON PLAN. IF THERE APPEARS TO BE A CONFLICT, AND/OR UPON DISCOVERY OF ANY
UTILITY NOT SHOWN ON THIS PLAN, CALL MISS UTILITY OF CENTRAL VIRGINIA AT 1-800-552-7001. THE OWNER SHALL BE
RESPONSIBLE FOR THE RELOCATION OF ANY UTILITY WITHIN EXISTING AND/OR PROPOSED RIGHT-OF-WAY REQUIRED
BY THE DEVELOPMENT.
14. CASING SLEEVES SHALL BE PLACED AT ALL ROAD CROSSINGS FOR GAS, POWER, TELEPHONE AND CABLE TV SERVICE
TRUNK LINES.
15. THE INSTALLATION OF SEWER, WATER, AND GAS MAINS (INCLUDING SERVICE LATERALS AND SLEEVES) SHALL BE
COMPLETED PRIOR TO THE PLACEMENT OF AGGREGATE BASE COURSE.
16. VDOT & ALBEMARLE COUNTY APPROVAL OF CONSTRUCTION PLANS DOES NOT PRECLUDE THE RIGHT TO REQUIRE
ADDITIONAL FACILITIES AS DEEMED NECESSARY.
17. VDOT SHALL HAVE APPROVED THE AGGREGATE BASE COURSE(S) FOR DEPTH, TEMPLATE AND PERFORMED THE
REQUIRED FIELD INSPECTION (PROOF ROLL) PRIOR TO PLACEMENT OF ANY SURFACE COURSE(S). CONTACT THE
OWNER'S REPRESENTATIVE FOR INSPECTION FOR THE AGGREGATE BASE COURSE(S) 48 HOURS PRIOR TO
APPLICATION OF THE SURFACE COURSE(S).
18. A PRIME COAT SEAL BETWEEN THE AGGREGATE BASE AND BITUMINOUS CONCRETE WILL BE REQUIRED AT THE RATE
OF 0.30 GALLONS PER SQUARE YARD (REC-250 PRIME COAT) PER VDOT STANDARDS AND SPECIFICATIONS.
19. THE SCHEDULING OF AGGREGATE BASE INSTALLATION AND SUBSEQUENT PAVING ACTIVITIES SHALL ACCOMMODATE
FORECAST WEATHER CONDITIONS PER SECTION 315 OF THE ROAD AND BRIDGE SPECIFICATIONS.
20. THE OWNER'S REPRESENTATIVE SHALL HAVE APPROVED THE AGGREGATE BASE COURSE(S) FOR DEPTH, TEMPLATE
AND PERFORMED THE REQUIRED FIELD INSPECTION (PROOF ROLL) PRIOR TO PLACEMENT OF ANY SURFACE
COURSE(S). CONTACT THE OWNER FOR INSPECTION FOR THE AGGREGATE BASE COURSE(S) 48 HOURS PRIOR TO
APPLICATION OF THE SURFACE COURSE(S).
21. A GEOTECHNICAL ENGINEER IS TO ASCERTAIN CAUSE AND CERTIFY RECOMMENDED METHOD OF REPAIR FOR ALL
PAVEMENT STRUCTURAL FAILURES PRIOR TO STATE ACCEPTANCE.
22. ALL VEGETATION AND ORGANIC MATERIAL IS TO BE REMOVED FROM THE PROPOSED PAVEMENT LIMITS PRIOR TO
CONDITIONING OF THE SUBGRADE.
23. CERTIFICATION AND SOURCE OF MATERIALS ARE TO BE SUBMITTED TO THE OWNER'S REPRESENTATIVE FOR ALL
MATERIALS AND BE IN ACCORDANCE WITH THE ROAD AND BRIDGE SPECIFICATIONS, AND ROAD AND BRIDGE
STANDARDS.
24. APPROVAL OF A DETAILED CONSTRUCTION SEQUENCING/MAINTENANCE OF TRAFFIC NARRATIVE FOR THE WORK ZONE
IS A PREREQUISITE FOR ISSUANCE OF A LAND USE PERMIT ALLOWING ACCESS TO AND CONSTRUCTION WITHIN VDOT
MAINTAINED RIGHT OF WAY. (N/A)
25. GRADE LINES ON PROFILES DENOTE FINISHED GRADE OF CENTER LINE OF ROAD.
26. ALL APPROACH GUTTERS TO SAG INLETS SHALL MAINTAIN A MINIMUM SLOPE OF 0.004 ft./ft.
27. WHERE A TYPE "B" NOSE IS SPECIFIED ON AN INLET IN CONJUNCTION WITH ROLL FACE CURB AND GUTTER OR CG-7,
THERE SHALL BE A 20' TRANSITION ON EACH SIDE OF THE INLET. (N/A)
28. CONTRACTOR SHALL PROVIDE A SEQUENCE OF CONSTRUCTION/MAINTENANCE OF TRAFFIC PLAN IN ACCORDANCE
WITH THE STANDARDS AND GUIDELINES CONTAINED IN THE 2011 EDITION OF THE VIRGINIA WORK AREA PROTECTION
MANUAL FOR REVIEW BY THE ENGINEER, OWNER'S REPRESENTATIVE, AND VDOT PRIOR TO STARTING WORK THAT
IMPACTS TRAFFIC ON STATE ROADS.
29. ALL NEW HANDICAP ACCESSIBLE REQUIREMENTS ON -SITE AND WITHIN ALL NEW STRUCTURES SHALL COMPLY WITH
THE 2015 UNIFORM STATEWIDE BUILDING CODE, 2015 VIRGINIA CONSTRUCTION CODE, AND ICC/ANSI A117.1-03.
30. THE CLEAR ZONE IS TO BE FREE OF STORED MATERIALS AND PARKED EQUIPMENT.
31. HORIZONTAL AND VERTICAL SIGHT DISTANCES SHALL BE FREE OF PARKED VEHICLES.
32. ALL EXCAVATED AREAS WITHIN THE CLEAR ZONE THAT HAVE A DEPTH GREATER THAN 6" SHALL HAVE A 6:1 STONE
WEDGE PLACED AT THE END OF THE DAY.
33. RETAINING WALLS GREATER THAN 3 FEET IN HEIGHT REQUIRE A SEPARATE BUILDING PERMIT. WALLS EXCEEDING 4
FEET IN HEIGHT REQUIRE A STAMPED ENGINEERED DESIGN ALSO. WALLS REQUIRE INSPECTIONS AS OUTLINED IN THE
USBC.
34. BUILDINGS AND STRUCTURES BUILT BEFORE JANUARY 1 1985 MUST HAVE AN ASBESTOS SURVEY PERFORMED IN
ORDER TO APPLY FOR A PERMIT. ASBESTOS REMOVAL PERMITS ARE REQUIRED IF POSITIVE FOR SUCH SUCH FROM
ALBEMARLE COUNTY AND VDOLI. CONTACT VDOLI FOR ADDITIONAL REQUIREMENTS AND PERMITS FOR DEMOLITION
PROJECTS.
BLASTING NOTES
1. BLASTING SHALL NOT BE PERMITTED ON THIS PROJECT.
ALBEMARLE COUNTY STORMWATER MANAGEMENT NOTES
1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE
CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO
BE PRESENT DURING CONSTRUCTION OF DAMS.
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.
SITE PLAN LEGEND
w WATER
101
STORM PIPE
100 STORM MANHOLE
D 100
DROP INLET & STRUCTURE NO.
CURB
CURB & GUTTER
_ = LIMITS OF DISTURBANCE
-X FENCE
XXX MAJOR CONTOUR
XXX MINOR CONTOUR
f TC 725.94 PROPOSED SPOT ELEVATION
10 PARKING COUNT
GRADING
TC = TOP OF CURB
EP = EDGE OF PAVEMENT
TW = TOP OF WALL
BW = BOTTOM OF WALL
TS = TOP OF STAIRS
BS = BOTTOM OF STAIRS
VARIABLE WIDTH'
NON -SLIP BROOM FINISH MAX. CROSS SLOPE 2%
4" 3,000 PSI AIR -ENTRAINED
CONCRETE
COMPACTED SUBGRADE 4" TYPE 21 B STONE
NOTE: SIDEWALKS SHALL BE CONSTRUCTED IN
ACCORDANCE WITH VDOT STANDARDS.
CONCRETE SIDEWALK PAVEMENT SECTION
No Scale
2" BITUMINOUS CONCRETE SURFACE COURSE - SM-9.5A
(PLACED IN SINGLE LIFT)
4" TYPE 21 B, AGGREGATE BASE COURSE
COMPACTED SUBGRADE
c= DENOTES LIGHT DUTY ASPHALT PAVEMENT ON PLANS
LIGHT DUTY ASPHALT PAVEMENT SECTION
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l.,c. No. 0401-057151
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0511012021
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H
IOB NO
694.1
SHEET NO.
C2.0
EROSION AND SEDIMENT CONTROL NARRATIVE:
PROJECT DESCRIPTION
THIS PROJECT INCLUDES THE CONSTRUCTION OF A MODULAR CLASSROOM ADDITION, SITE IMPORVEMENTS,
AND ASSOCIATED UTILITIES & LANDSCAPING. LIMITS OF CLEARING AND GRADING ARE 0.57 ACRES.
ADJACENT PROPERTY
THE PROPERTY IS BOUNDED BY RESIDENTIAL BUILDINGS TO THE NORTH, CROZET AVENUE TO THE EAST, AND
ROCKFISH GAP TPKE TO THE SOUTH AND OLD TRAIL DRIVE TO THE WEST.
EXISTING SITE CONDITIONS
THE EXISTING SITE IS HENLEY MIDDLE SCHOOL.
OFF-SITL AREAS
NO OFFSITE AREAS WILL BE DISTURBED. ANY OFF -SITE LAND -DISTURBING ACTIVITY ASSOCIATED WITH THE
PROJECT SHALL HAVE AN APPROVED ESC PLAN.
CRITICAL EROSION AREAS
EARLY ESTABLISHMENT AND PROPER MAINTENANCE OF PERIMETER CONTROLS WILL PROVIDE
SEDIMENTATION CONTROL. ALL SLOPES STEEPER THAN 3:1 SHALL BE STABILIZED WITH BLANKET MATTING.
EROSION AND SEDIMENT CONTROL MEASURES
UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL
PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND
SPECIFICATIONS OF THE CURRENT ADDITION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL
HANDBOOK. THE MINIMUM STANDARDS OF THE VESCH SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED
OR APPROVED BY A VARIANCE BY LOCAL AUTHORITIES HAVING JURISDICTION.
STORMWATER RUNOFF CONSIDERATIONS
STORMWATER QUALITY WILL BE TREATED THROUGH THE PURCHASE OF OFFSITE CREDITS. STORMWATER
QUANTITY WILL BE HANDLED THROUGH LEVEL SPREADERS RETURNING CONCENTRATED FLOW TO SHEET
FLOW AS NECESSARY.
STRUCTURAL PRACTICES:
1. TEMPORARY CONSTRUCTION ENTRANCE - 3.02 A TEMPORARY CONSTRUCTION ENTRANCE SHALL BE
PROVIDED AT THE LOCATION INDICATED ON THE PLANS. IT IS IMPERATIVE THAT THIS MEASURE BE
MAINTAINED THROUGHOUT CONSTRUCTION. ITS PURPOSE IS TO REDUCE THE AMOUNT OF MUD
TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF.
2. SILT FENCE BARRIER - 3.05 SILT FENCE SEDIMENT BARRIERS SHAL L BE INSTALLED DOWNSLOPE OF
AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT -LADEN RUNOFF FROM SHEET FLOW AS INDICATED.
ITS PURPOSE IS TO INTERCEPT SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS AND PREVENT
SEDIMENT FROM LEAVING THE SITE.
3. STORM DRAIN INLET PROTECTION - 3.07 STONE FILTERS SHALL BE PLACED AT THE INLET OF ALL
DRAINAGE STRUCTURES AS INDICATED ON PLANS. ITS PURPOSE IS TO PREVENT SEDIMENT FROM
ENTERING THE STORM DRAINAGE SYSTEM PRIOR TO PERMANENT STABILIZATION.
4. CULVERT INLET PROTECTION - 3.08 A SEDIMENT FILTER LOCATED AT THE INLET TO A CULVERT TO
PREVENT SEDIMENT FROM ENTERING THE SYSTEM PRIOR TO PERMANENT STABILIZATION.
5. DIVERSION DIKE - 3.09, 3.11 & 3.12 A TEMPORARY RIDGE OF COMPACTED SOIL TO DIVERT WATER FROM
A CERTAIN AREA.
6. SEDIMENT TRAP - 3.13 A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE TO
DETAIN SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET' AND "DRY" STORAGE LONG ENOUGH
FOR THE MAJORITY OF SEDIMENT TO SETTLE OUT.
6.1. MAINTENANCE OF SEDIMENT TRAP - INSPECT TRAP EMBANKMENT WEEKLY TO ENSURE IT IS
STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED DURING CONSTRUCTION ACTIVITIES. THE TRAP
SHALL BE CHECKED AFTER EVERY RAINFALL EVENT. ONCE THE SEDIMENT HAS REACHED THE
DESIGNATED CLEANOUT LEVEL IT SHALL BE REMOVED AND PROPERLY DISPOSED OF.
7. OUTLET PROTECTION - 3.18 STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING
DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS.
8. DUST CONTROL - 3.39 DUST CONTROL IS TO BE USED THROUGH THE SITE IN AREAS SUBJECT TO
SURFACE AND AIR MOVEMENT.
VEGETATIVE PRACTICES:
1. TOPSOIL (TEMPORARY STOCKPILE) - 3.30 TOPSOIL SHALL BE STRIPPED FROM AREAS TO BE GRADED
AND STOCKPILED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE LOCATED ONSITE AND
SHALL BE STABILIZED WITH TEMPORARY SILT FENCE AND VEGETATION.
2. TEMPORARY SEEDING - 3.31 ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN 30
DAYS SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING
GRADING OF THOSE AREAS. SELECTION OF THE SEED MIXTURE SHALL DEPEND ON THE TIME OF YEAR IT
IS APPLIED.
3. PERMANENT SEEDING - 3.32 FOLLOWING GRADING ACTIVITIES, ESTABLISH PERENNIAL VEGETATIVE
COVER BY PLANTING SEED TO REDUCE EROSION, STABILIZE DISTURBED AREAS, AND ENHANCE NATURAL
BEAUTY.
4. SOIL STABILIZATION BLANKETS & MATTING - 3.36 A PROTECTIVE COVERING BLANKET OR SOIL
STABILIZATION MAT SHALL BE INSTALLED ON PREPARED PLANTING AREAS OF CHANNELS TO PROTECT
AND PROMOTE VEGETATION ESTABLISHMENT AND REINFORCE ESTABLISHED TURF.
MANAGEMENT STRATEGIES
1. PROVIDE SEDIMENT TRAPPING MEASURES AS A FIRST STEP IN GRADING, SEED AND MULCH
IMMEDIATELY FOLLOWING INSTALLATION.
2. PROVIDE TEMPORARY SEEDING OR OTHER STABILIZATION IMMEDIATELY AFTER GRADING.
3. ISOLATE TRENCHING FOR UTILITIES AND DRAINAGE FROM DOWNSTREAM CONVEYANCES IN ORDER TO
MINIMIZE PERIMETER CONTROLS.
4. ALL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE MAINTAINED UNTIL THEY ARE NO LONGER
REQUIRED TO COMPLY WITH THE CONTRACT DOCUMENTS OR STATE LAW.
PERMANENT STABILIZATION
ALL NON -PAVED AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH PERMANENT SEEDING
IMMEDIATELY FOLLOWING FINISHED GRADING. SEEDING SHALL BE IN ACCORDANCE WITH STD. & SPEC.
3.32, PERMANENT SEEDING. SEED TYPE SHALL BE AS SPECIFIED FOR "MINIMUM CARE LAWNS" AND
"GENERAL SLOPES" IN THE HANDBOOK FOR SLOPES LESS THAN 3:1. FOR SLOPES GREATER THAN 3:1, SEED
TYPE SHALL BE AS SPECIFIED FOR "LOW MAINTENANCE SLOPES" IN TABLE 3.32-D OF THE HANDBOOK. FOR
MULCH (STRAW OR FIBER) SHALL BE USED ON ALL SEEDED SURFACES. IN ALL SEEDING OPERATIONS SEED,
FERTILIZER AND LIME SHALL BE APPLIED PRIOR TO MULCHING.
SEQUENCE OF INSTALLATION
PHASE I (SEE SHEET C3.2)
1. A PRE -CONSTRUCTION MEETING IS REQUIRED WITH ALBEMARLE COUNTY E&S INSPECTOR, CONTRACTOR,
OWNER, AND ENGINEER. THIS MEETING SHALL TAKE PLACE ON -SITE. CLEARING LIMITS MUST BE
FLAGGED PRIOR TO THE MEETING WITH ONE (1) WEEK OF NOTICE.
2. INSTALL CONSTRUCTION ENTRANCE, SILT FENCE,AND INLET PROTECTION.
3. AFTER ALL EROSION AND SEDIMENT CONTROL MEASURES ARE IN PLACE, SITE WORK CAN BEGIN.
4. ROUGH GRADE PROJECT AREA.
5. SEED ALL DENUDED AREAS PER VESCH STANDARDS.
PHASE II (SLL SHEET C3.3)
1. FINE GRADE PROJECT AREA. APPLY PERMANENT SOIL STABILIZATION TO THESE AREAS WITHIN SEVEN
DAYS AFTER FINAL GRADE IS ACHIEVED.
2. ALL STORMWATER PIPING & STRUCTURES, INCLUDING DETENTION FACILITIES SHALL BE INSPECTED FOR
SILT/SEDIMENT. IF PRESENT, SILT/SEDIMENT SHALL BE CLEANED OUT FOR THE SYSTEM TO THE
SATISFACTION OF THE E&S INSPECTOR.
3. APPLY PERMANENT SOIL STABILIZATION TO THESE AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS
ACHIEVED. SILT FENCE BELOW SEDEMENT TRAP MUST BE MAINTAINED THROUGH GRADING AND
CONSTRUCTION.
4. ONCE ALL CONTRIBUTING DRAINAGE AREAS TO SEDIMENT TRAP HAVE BEEN STABILIZED TRAP CAN BE
REMOVED AND GRADED TO FINAL GRADE.
5. ONCE CONSTRUCTION IS COMPLETE AND ALL CONTRIBUTING AREAS ARE STABILIZED, EROSION
CONTROL MEASURES CAN BE REMOVED UPON APPROVAL FROM THE E&S INSPECTOR.
MINIMUM STANDARDS:
AN EROSION AND SEDIMENT CONTROL PROGRAM ADOPTED BY A DISTRICT OR LOCALITY MUST BECONSISTENT 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
APPLIED WITHIN SEVEN 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. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES 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 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 MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS
IMMEDIATELY AFTER INSTALLATION.
MS-6. SEDIMENT TRAPS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE
SERVED BY THE TRAP.
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.
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
BE 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 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 MAYBE 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 BE PROVIDED.
MS-14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING LIVE
WATERCOURSES SHALL BE MET.
MS-15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY 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 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 BL ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS.
F. APPLICABLE SAFETY REGULATIONS 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 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. 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
STANDARDS AND CRITERIA LISTED IN SECTION 19 OF VIRGINIA ADMINISTRATIVE CODE 9VAC25-840-40 MINIMUM
STANDARDS.
GENERAL EROSION AND SEDIMENT CONTROL NOTES:
ES-1: UNLESS OTHERWISE INDICATED, CONSTRUCT AND MAINTAIN ALL VEGETATIVE AND STRUCTURAL EROSION
AND SEDIMENT CONTROL PRACTICES ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE
LATEST EDITION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA
REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS.
ES-2: THE CONTROLLING EROSION AND SEDIMENT CONTROL AUTHORITY WILL MAKE A CONTINUING REVIEW AND
EVALUATION OF THE METHODS AND EFFECTIVENESS OF THE EROSION CONTROL PLAN.
ES-3: PLACE ALL EROSION AND SEDIMENT CONTROL MEASURES PRIOR TO OR AS THE FIRST STEP IN CLEARING,
GRADING. OR LAND DISTURBANCE.
ES-4: MAINTAIN A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN ON THE SITE AT ALL TIMES
O��,y:NLTH OF L
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`1U� 1TfL�X M. SHOMLTER y
Lie. No, 0402057151
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M E
ES-5: PRIOR TO COMMENCING LAND -DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS
N
(INCLUDING, BUT NOT LIMITED TO, OFFSITE BORROW OR WASTE AREA), SUBMIT A SUPPLEMENTARY
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EROSION CONTROL PLAN TO THE ARCHITECT/ENGINEER AND THE CONTROLLING EROSION AND SEDIMENT
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CONTROL AUTHORITY FOR REVIEW AND ACCEPTANCE.
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ES-6: PROVIDE ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND
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SEDIMENTATION AS DETERMINED BY THE RESPONSIBLE LAND DISTURBER. (MODIFIED NOTE)
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ES-7: ALL DISTURBED AREAS SHALL DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING
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LAND -DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT.
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ES-8: DURING DEWATERING OPERATIONS, PUMP WATER INTO AN APPROVED FILTERING DEVICE.
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ES-9: INSPECT ALL EROSION CONTROL MEASURES DAILYAND AFTER EACH RUNOFF- PRODUCING RAINFALL EVENT.
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MAKE ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL
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DEVICES IMMEDIATELY.
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SOILS INFORMATION:
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4E -ASHE LOAM, 25 TO 45 PERCENT SLOPES. 20 TO40 INCHES TO RESTRICTIVE FEATURES, EXCESSIVELY DRAINED,
HYDROLOGIC SOIL GROUP: B
7B - BRADDOCK LOAM, 2 TO 7 PERCENT SLOPES. MORE THAN 80 INCHES TO RESTRICTIVE FEATURES, WELL DRAINED, I vi
HYDROLOGIC SOIL GROUP: B °C
0
0
36B - HAYESVILLE LOAM, 2 TO 7 PERCENT SLOPES. MORE THAN 80 INCHES TO RESTRICTIVE FEATURES, WELL DRAINED,
HYDROLOGIC SOIL GROUP: B
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37C3 - HAYESVILLE CLAY LOAM, 7 TO 15 PERCENT SLOPES. MORE THAN 80 INCHES TO RESTRICTIVE FEATURES, WELL
DRAINED, HYDROLOGIC SOIL GROUP: B
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81B - THURMONT LOAM, 2 TO 7 PERCENT SLOPES. MORE THAN 80 INCHES TO RESTRICTIVE FEATURES, HYDROLOGIC V
SOIL GROUP: B
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91 - URBAN LAND, 0 TO 25 PERCENT SLOPES. 10 INCHES TO RESTRICTIVE FEATURES 0
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DATE
0511012021
DRAWN BY
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JOB NO.
694.(
SHEET NO.
C3.0
GRAVEL FILTER 12
RUNOFF WATER WIRE MESH
FILTERED WATER
.Erg'...,,; •:>.r ro•'.,. .
T T
SEDIMENT) I I
a : ..
CONCRETE _—
GUTTER CURB INLET
12"
* GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE.
SPECIFIC APPLICATION: THIS METHOD OF INLET PROTECTION IS APPLICABLE AT
CURB INLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO
CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND
UNPROTECTED AREAS.
STORMWATER INLET PROTECTION
No Scale
SILT FENCE DROP INLET PROTECTION
EXISTING GROUND
I B
12' MIN
VDOT#1 COARSE AGGREGATE B
*MUST EXTEND FULL WIDTH OF
INGRESS AND EGRESS OPERATION
�WASHRACK
1
r 5:1 EXISTING
PAVEMENT
MOUNTABLE BERM
(OPTIONAL)
10' MIN.
POSITIVE 110' MIN.
DRAINAGE TO L
SEDIMENT
TRAPPING DEVICE
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STONE CONSTRUCTION ENTRANCE
No Scale
TABLE 3.31-B
ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS
"QUICK REFERENCE FOR ALL REGIONS"
EXISTING
PAVEMENT
PLANTING DATES
SPECIES
RATE (LBS./ACRE)
SEPT. 1 - FEB. 15
50/50 MIX OF
ANNUAL RYEGRASS
(LOLIUM MULTI-FLORUM)
&
50-100
CEREAL (WINTER) RYE
(SECALE CEREALE)
FEB. 16 - APR. 30
ANNUAL RYEGRASS
60-100
(LOLIUM MULTI-FLORUM)
MAY 1 - AUG. 31
GERMAN MILLET
50
(SETARIA ITALICA)
TEMPORARY SEEDING PLANT MATERIALS
No Scale
TABLE 3.32-C
SITE SPECIFIC SEEDING MIXTURES FOR APPALACHIAN/MOUNTAIN
AREA
TOTAL LBS. PER ACRE
MINIMUM CARE LAWN
COMMERCIAL OR RESIDENTIAL 200-250 LBS.
KENTUCKY 31 OR TURF -TYPE TALL FESCUE 90-100%
IMPROVED PERENNIAL RYEGRASS0-10%
KENTUCKY BLUEGRASS 0-10%
2 X 4" WOOD DROP INLET WITH
FRAME GRATE
HIGH -MAINTENANCE LAWN
p
MINIMUM OF THREE (3) UP TO FIVE (5)
1 S
rrd FRAME
VARIETIES OF BLUEGRASS FROM
MAX.
—
l �~
APPROVED LIST FOR USE IN VIRGINIA.
125 LBS.
GENERAL SLOPE (3:1 OR LESS)
'—
3'
KENTUCKY 31 FESCUE
128 LBS.
MIN.
RED TOP GRASS
2 LBS.
GATHER
J`
SEASONAL NURSE CROP'*
20 LBS.
EXCESS
AT
150 LBS.
CORNERS
LOW -MAINTENANCE SLOPE (STEEPER THAN 3:1)
KENTUCKY 31 FESCUE
108 LBS.
PERSPECTIVE VIEWS
RED TOP GRASS
2 LBS.
SEASONAL NURSE CROP'*
20 LBS.
CROWNVETCH *"
20 LBS.
FABRIC
:III
IWA
DETAIL A
ELEVATION OF STAKE AND FABRIC ORIENTATION
SPECIFIC APPLICATION
THIS METHOD OF INLET PROTECTION IS APPLICABLE WHERE THE INLET DRAINS A
RELATIVELY FLAT AREA (SLOPE NO GREATER THAN 5%) 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.
3.07-1 PS
150 LBS
* PERENNIAL RYEGRASS WILL GERMINATE FASTER AND AT LOWER SOIL
TEMPERATURES THAN FESCUE, THEREBY PROVIDING COVER AND
EROSION RESISTANCE FOR SEEDBED.
" USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES
AS STATED BELOW:
MARCH, APRIL THROUGH MAY 15TH .............................. ANNUAL RYE
MAY 16TH THROUGH AUGUST 15TH......................... FOXTAIL MILLET
AUGUST 16TH THROUGH SEPTEMBER, OCTOBER...... ANNUAL RYE
NOVEMBER THROUGH FEBRUARY................................. WINTER RYE
IF FLATPEA IS USED, INCREASE TO 30 LBS./ACRE. ALL LEGUME SEED
MUST BE PROPERLY INOCULATED. WEEPING LOVEGRASS MAY ALSO BE
INCLUDED IN ANY SLOPE OR LOW -MAINTENANCE MIXTURE DURING
WARMER SEEDING PERIODS; ADD 10-20 LBS./ACRE IN MIXES.
3.02
3.32
1. SET THE STAKES.
2. EXCAVATE A 4"X 4" TRENCH UPSLOPE
ALONG THE LINE OF STAKES.
3. STAPLE FILTER MATERIAL TO STAKES AND 4. BACKFILL AND COMPACT THE
EXTEND IT INTO THE TRENCH. EXCAVATED SOIL.
SILT FENCE
No Scale
FLOW �ILbk
JIyEET FLOW INSTALLATION
(PERSPECTIVE VIEW)
3'
FLOW I MAX.
A B 0A,
\
II �\
POINTS A SHOULD BE HIGHER THAN POINT B.
DRAINAGEWAY INSTALLATION
(FRONT ELEVATION)
V/O WIRE SUPPORT)
ERNST CONSERVATION SEEDS
RIGHT-OF-WAY NON-NATIVE WOODS MIX - ERNMX-132
BOTANICAL NAME
PRICE/LB
30.00% FESTUCA RUBRA
20.00% LOLIUM PERENNE,
'FASTBALL RGL'
COMMON NAME
CREEPING RED FESCUE 1.90
PERENNIAL RYEGRASS, 1.85
'FASTBALL RGL'
(TURF TYPE)
20.00% PHLEUMPRATENSE, TIMOTHY, 'CLIMAX' 1.20
'CLIMAX'
12.00% TRIFOLIUM HYBRIDUM
ALSIKE CLOVER 3.25
10.00% AGROSTIS PERENNANS,
AUTUMN BENTGRASS, 14.00
ALBANYPINE BUSH -
ALBANYPINE BUSH -
NYECOTYPE
NY ECOTYPE
8.00% AGROSTIS ALBA REDTOP 8.00
100% MIX PRICE/LB BULK: $3.61
SEEDING RATE: 40-60 LB PER ACRE
WOODLAND OPENINGS
THE SHADE -TOLERANT GRASSES AND CLOVER ARE GOOD FOR
WOODLAND OPENINGS AND PARTIALLY SHADED SITES. MIX
FORMULATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE DEPENDING
ON THE AVAILABILITY OF EXISTING AND NEW PRODUCTS. WHILE THE
FORMULA MAY CHANGE, THE GUIDING PHILOSOPHY AND FUNCTION OF
THE MIX WILL NOT.
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05/10/2021
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CUT TO
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ADDITIONS AND RENOVATION PLAN.
m
m
I- - - - - - - - - - -
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PRESUMED L OCATION OF
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MULTI -LEVEL
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HENLEY MIDDLE SCHOOL
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WATER QUANTITY
WATER QUALITY ANALYSIS
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IN THE DEVELOPED CONDITION, THE RUNOFF FROM THE
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SUMMARY FROM RUNOFF REDUCTION SPREADSHEET
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CONCENTRATED DISCHARGE TO RETURN RUNOFF TO
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SAN
TOTAL ON SITE DISTURBED ACREAGE: 0.57 ACRES
SS/ONAI
SHEET FLOW. THIS PROJECT FULFILLS THE
REQUIREMENTS OF SECTION 9VAC25-970-66 SECTION D.
PRE -DEVELOPMENT LAND COVER:
GAG
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- -
REQUIRED REMOVAL: THE 0.40 LBS/YR REQUIRED REMOVAL
o LL
WILL BE SATISFIED BY PURCHASING NUTRIENT CREDITS. TO BE
�w W t
PURCHASE FROM A DEQ APPROVED CREDIT BANK IN
ACCORDANCE WITH LIS CODE OF VIRGINIA 62.1-44.15:35.
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LIMITS OF ` ` \ ` ` �� / s \ -j00_�_ _
DISTURBANCE _ ` \ \ PN� / \ \ \ - , _
- _ _ _
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05/10/2021
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SIZE (2)6"X6"WOOD TIMBER
DRAWN
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FILTER FABRIC 18" LONG #4 EPDXBRICK
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APPROX. LOCATION OF SEWER LATERAL OPENING THROUGH BLDG. WALL PRESUMED LOCATION OF \
BASED ON 2004 HENLEY MIDDLE SCHOOL p W O W (BRICK SPAN OVERHEAD) WATERLINE BASED ON FIELD
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ADDITIONS AND RENOVATION PLAN. ro m EVIDENCE (NOT MARKED / MAPPED)
4694.00
MUL TI-LEVEL I
SHEET NO.
POST -DEVELOPED CONDITION BRICK& FRAME SCHOOL FACILITY FFE=684.18' - I
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MODIFIED CN METHOD
(per DEQ2013draft SWIM handbook section 11.5.3)
RAINFALLINCHES -P= 1 INCH
from TR-55 table 4-II
Runoff Coefficients (Rv)
Hydrologic
Soil Type
A
B
C
D
Forest/Open Space
0.02
0.03
0.04
0.05
Managed Turf
0.15
0.20
0.22
0.25
Impervious Cover
0.95
0.95
0.95
0.95
DRAINAGEAREAAND
INLET LABEL
IMPERVIOUS
AREA AC
Soil Type
MANAGED TURF
AREA AC
MANAGED
TURFRV
FOREST/OPEN
SPACE AC
FOREST/OPEN
RV
TOTAL
AREA AC
RV
Tv-1"
VOLUME CF
Qa-RUNOFFVOL
WATERSHED INCHES
MODIFIED
CN
la - INITIAL
ABSTRACTION
la/P
Tc
hours
qu - UNIT PEAK
DISCHARGE csm/in
gpTv-1"Treatment
Volume Peak Discharge
Henley
0.18
D
1 0
0.25
0
1 0.05
1 0.18
1 0.95
1 621
1 0.950
1 99.57
0.009
1 0.009
1 0.10
1 1000
0.27
RATIONAL METHOD
1YR RAINFALL INTENSITY=
2YR RAINFALL INTENSITY=
10YRRAINFALL INTENSITY=
4.22
5.04
6.64
IN/HR
IN/HR
IN/HR
Q(CFS)
WEIR LENGTH
WEIR COEFF
FLOW DEPTH -FT
DEPTH INCHES
LEVEL SPREADER
1"
0.27
13
3.33
0.03
0.41
WEIR
1YR
0.68
13
3.33
0.06
0.76
COMPUTATIONS
2YR
0.82
13
3.33
0.07
0.85
10YR
1.08
13
3.33
0.09
1.02
Runoff Coefficients (C)
Hydrologic
Soil Type
A
B
C
D
Forest/Open Space
0.20
0.20
0.20
0.20
Managed Turf
0.30
0.30
0.30
0.30
Impervious Cover
0.90
0.90
0.90
0.90
DRAINAGEAREA AND
INLET LABEL
IMPERVIOUS
AREA (AC)
Soil Type
MANAGED TURF
AREA (AC)
MANAGED
TURF RV
FOREST/OPEN
SPACE (AC)
FOREST/OPEN
I RV
TOTAL
I AREA (AC)
Average
Cvalue
Q1yrFlow
I (CFS)
Q2yrFlow
(CFS)
Q10yrFlow
(CFS)
Henley
0.18
1 D
1 0
r 0.3
1 0
1 0.05
1 0.18
0.90
1 0.68
1 0.82
1.08
Dfq Virginia Runoff Reduction Method R e-Development Compliance Spreadsheet - Versian 3.0
0 2011 BMP Standards and specifications 02013 Draft BMP Standards and Specifications
Project Name: Henley MS Modular
Date; 5/6/2021
Linear Development Project? No
Site Information
Post -Development Project (Treatment Volume and Loads)
Enter Total Disturbed Area (acres) -�> 0.57
I
Pre-ReDevelopment Land Cover (acres)
ASol Is
BSoils
CSoils
DSoils
Totals
Forest/Ope n Space (acres) - u n d istu rbe d
forest/open sace
Managed Turf (acres) - disturbed, graded
for ardsorotherturftobe
D.S3
0.53
Imperviouscover(acres)
0.04
0.04
0.57
Post -Development Land Cover (acres)
ASol Is
BSol ls
CSoils
DSoils
Totals
Forest/Open Space (acres) - undisturbed,
0.00
rot ect ed fare o ens ace ❑r reforested p
Managed Turf (acres) - d ist urbed, grad ed
for yards❑rothertuiftobe
032
0.32
Impervious Cover(acres)
0.25
0.25
Area Checkl
or,
OK.
OK.
OK.
0.57
Constants
Annual Rainfall (inches)
43
Target Rainfall Event (inches)
1.00
Total Phosphoms (TP) EMC(ng/L)
0.26
Total Nitrogen (TN) EMC(ng/L)
1.86
Target TP Load (Ib/acre/yr)
0A1
Pj (unitless corredian factor)
0.90
Runoff Coefficients (Rv)
Check
BMP Design Specifications List: 2013 Draft Stds & Specs
Linear project? No
Land cover areas Entered correctly? V1
Total disturbed area entered? ♦ 1
A Soils
B Soils
C Soils
D Soils
Forest/Open Space
0.02
0.03
0.04
OL05
Managed Turf
0.15
0.20
0.22
Q25
I mpervi ous Cover
0.95
0.95
0.95
0.95
Land Cover Summary -Pre
Pre-ReDevelopment
Listed
Adjusted'
Forest/Open Space Caver(acres)
0.00
(100
Weighted Rv(forest)
0.00
0.09
%Forest
0%
0%
Managed Turf Cover (acres)
0.53
0.32
Weighted Rv(turf)
0.25
0.25
% Managed Turf
93%
89%
I mpervious Cover(acres)
0.04
QOf
Rv(impervious)
0,95
OL95
%Impervious
7%
U%
Total Site Area (acres)
0.57
Q36
Site Rv
0.30
Q33
Treatment Volume and Nutrient Load
Pre-ReDevelopment Treatment Volume
(acre-ft)
0.0142
0.00%
Pre -Re Deve lopme nt Treatme nt V olume
(cubicfeet)
619
428
Pre-ReDeve(opmem TP Load
(lb/yr)
D.39
D.27
Pre-ReDwel opmentTP Load per acre
(lb/acre/yr)
058
0.75
Base I ne TP Load (I b/yr)
(0A1 lbs/acre/yr applied to pre-redevelopmentarea excluding
pervious land proposed for new i mpavi aus cover)
0.15
'Adjusted Land Cover Summary:
Pre ReDevelopment land cover minus perviousland cover (forest/open spaceor
monoged turf) acreage proposed for new impervious cover.
Adjusted total acreage is consistent with Post-ReDevelopmentacreage (minus
acreage of new impervious cover).
Column i shows load reduction requrement fornew impervious cover (based on
Land Cover Summary -Post (Rnd)
Post ReDev. & New 1 mpervious
Forest/Open Space
0.00
Cover (acres)
Weighted Rv(forest) 0.0D
%Forest 0%
Managed Turf Cover 032
Weighted Rv (turf)
0.25
% Managed Turf
56%
I mpervi ous Cover
(acres)
D.25
Rv(impervious)
0.95
%Impervious
44%
Final Site Area(wres)
0.57
Final Past DevSite Rv
0.56
Final Post -
Development
Treatment Volume
0.026S
(acre-ft)
Final Post -
Development
1,153
Treatment Volume
(cubicfeet)
Final Post -
Development TP
0.72
Load
(lb/yr)
Final Past Development
TP Load per acre
1.27
(lb/acre/yr)
Laud raver ast
Post-ReDevelopment
Forest/Open Space
U.00
Cover(acres)
Weighted Rv(forest) 0.00
%Forest 0%
Managed Turf Cover 0.32
Weighted Rv (turf)
0.25
% Managed Turf
89ye
ReDev-Impervious
Cover (acres)
OD4
Rv(impervious)
0.95
%Impervious
11%
atal ReDev. Ste Area
(a®es)
0-M
ReDev Site Rv
om
Treatment Volume and Nutrient Load
Nitrogen Loads (Informational Purposes Only)
Post-ReDevelopment
TreatmentVdume
0.0099
( acre-ft)
Post-ReDevelopment
TreatmentVolume
428
(cubic feet)
Post- Re Devel opine nt
Load (TP) 027
(l b/K)'
Pos-ReDevelopmmtTP
Load per are 075
(6/are/yr)
Max. Reduction Required
(Below Pre-
10%
ReDevelopment Load)
TP Load Reduction
Required for 0.03
Redeveloped Area
(lb/yr)
Land rover Smunary-Past
Pint -Development New Impervious
New Impervious Cover
(acres)
Rv(imper0ous)
Post -Development
Treatment Volume
(acre-ft)
Post -Development
Treatment Volume
(cubicfeet)
Post -Development TP
Load (lb/yr)
0.21
0.95
724
OA6
TP Load Reduction
Required for New 0.37
Impervious Area
(lb/yr)
�L:\LTy 0�
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1TMN K SHOW..ALTER
I i. No.040_057151
iO�+O 05/10/2021
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DATE
0511012021
DRAWN BY
AF
DESIGNED BY
AF
CHECKED BY
JS
SCALE
1"=20'
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Pre -Re Development TN Load Final Post -Development TN Load
(lb/yr) 2.73 (Port-ReDevelopment&New 5.19
Impervious) (Ib/yr)
AM
JOB NO.
694.0
SHEET NO.
C6.1