HomeMy WebLinkAboutWPO201700032 Plan - Stormwater WPO VSMP 2017-04-18OWNER:
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FIRST GOLD LEAF LAND TRUST
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P.O. BOX 5548
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CHARLOTTESVILLE, VA 22905
EROSION & SEDIMENT CONTROL PLAN NARRATIVE
04500— 00— 00-11000
PHASE I EROSION & SEDIMENT CONTROL PLAN
FIRST GOLD LEAF LAND TRUST
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P.O. BOX 5548
CHARLOTTESVILLE, VA 22905
APPLICANT
SEVEN DEVELOPMENT
STORMWATER MANAGEMENT NOTES & DETAILS
1900 ARLINGTON BLVD., SUITE A
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CHARLOTTESVILLE, VA 22903
ENGINEER:
COLLINS ENGINEERING
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200 GARRETT ST. SUITE K,
CHARLOTTESVILLE, VA 22902
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TELEPHONE: (434)293-3719
TAX MAP NO.:
04500-00-00-11100 (D.B. 4659/ PG. 032)
..
04500-00-00-11000 (D.B. 4659/ PG. 032)
AREA:
04500-00-00-111CO — 1.14 ACRES
04500-00-00-11000 — 3.82 ACRES
ZONING:
HIGHWAY COMMERCIAL & ENTRANCE CORRIDOR
BUILDING HEIGHTS:
MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 65 FEET
EXISTING/PROPOSED USE.
EXISTING SITE VACANT
; ONE BAN
PROPOSED 45,600 SF COMMERCIAL/RETAIL
SUBDIVISION STREETS:
CURB & GUTTER
WA TERSHED:
THIS SI TE IS NOT LOCA TED IN A RESERVOIR WA TERSHED.
TOPO & SURVEY-
TOPOGRAPHY PROVIDED BY LICENSED LAND SURVEYOR ROGER RAY &
ASSOCIATES, FIELD VERIFIED IN SEPTEMBER 2016'. BOUNDARY PROVIDED BY
LINCOLN SURVEYING.
EXISTING VEGETATION:
PREVIOUSLY CLEARED AREAS WITH A WOODED PERIMETER.
CRITICAL SLOPES:
CRITICAL SLOPE IMPACTS HAVE BEEN PREVIOUSL Y APPROVED WITH PHASE I
DEVELOPMENT PLANS FOR NORTHTOWN CENTER, AND THE PREVIOUS
GRADING AND SITE DISTURBANCE HAS IMPACTED THESE PREVIOUSLY
APPROVED CRITICAL SLOPES. THERE ARE NO MANAGED OR PRESERVED
SLOPES ON THIS PROJECT.
FLOODPLAIN: THERE IS NO 100—YEAR FLOODPLAIN ON THIS SITE.
RETAINING WALLS: NO PROPOSED RETAINING WALLS WITH THIS EARLY GRADING PERMIT PLAN.
THE SITE DOES CONTAIN EXISTING RETAINING WALLS AS SHOWN ON THE
PLANS.
ADJACENT PROPERTY OWNERS: SEE EXISTING CONDITIONS, SHEET 2.
PHASING: PHASE IIA — ONE (1) MIXED USE BUILDING & PARKING AREAS
PHASE IIB — ONE (1) RETAIL BUILDING & PARKING AREAS
PHASE //8 — (THIS PLAN)
STORMWA TER MANAGEMENT FACILITY- EXISTING BIO—FILTER AND RAIN GARDEN SHALL
ACCOMMODATE STORM WA TER MAAVAGEMENT REQUIREMENTS
FOR THE PARCEL ADJACENT TO IROUTE 29. A STORMWA TER
MANAGEMENT POND IS PROPOSED FOR WATER QUANTITY
DETENTION FOR THE REAR PARCEL. WATER QUALITY FOR
ACCOMM
L SHALL BE CaDA TED THROUGH ON—SITE
THIS PARCEL
BUFFERS AND MI TIGA TION CREDITS. SEE STORMWA TER
MANAGEMENT PLAN FOR ADDITIONAL DETAILS.
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TOTAL NUMBER OF SHEETS
LEGEND
EXISTING CULVERT ,,, . ,,, EARTH DITCH
CUL VERT DRIVEWAY CULVERT
DROP INLET & STRUCTURE NO. BENCH MARK
CURB
CURB & GUTTER — — — — — CLEARING LIMITS
PROPOSED PA VEMENT as VDOT STANDARD STOP SIGN
EC -3A DITCH — EXISTING CONTOUR
DEPTH OF EC -3A DITCH PROPOSED CONTOUR
EC -2 DITCH 240.55 PROPOSED SPOT ELEVATION
TBC DENOTES TOP/BACK OF CURB
DEPTH OF EC -2 DITCH TAB DENOTES TOP OF BOX
APPROVED
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EROSION & SEDIMENT CONTROL MEASURES:
STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT
CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING.
3.01 SAFETY FENCE.•
A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION
CONTROL MEASURE BY THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY
VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC.
3.02 CONSTRUCTION ENTRANCE.
A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION
SITE TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES
SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS
3.05 SILT FENCE
A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ,ACROSS AND ATTACHED TO SUPPORTING POSTS AND
ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO
PREVENT SEDIMENT FROM LEAVING THE SITE AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TD -MODERATE LEVEL CHANNEL FLOWS
THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET
FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION &
SEDIMENT CONTROL HANDBOOK (VESCH).
3.07 STORM DRAIN INLET PROTECTION.
A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP NNLET OR CURB INLET. TO PREVENT SEDIMENT FROM
ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PROTECTION APPLIES WHERE STORM
fNT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA.
DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT
3.09 TEMPORARY DIVERSION DIKE.•
A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM
UPSLOPE DRAINAGE AREAS A WAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO ,A STABILIZED OUTLET. TO DIVERT SEDIMENT -LADEN
RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS A SEDIMENT 7RAP OR SEDIMENT BASIN. USE WHEREVER
STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING
CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER
MAINTENANCE.
3.12 DIVERSION.
A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPORTING EARTHEN RIDGE ON THE LOWER SIDE TO REDUCE SLOPE LENGTH AND TO
INTERCEPT AND DIVERT STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON-EROSIVE VELOCITIES. APPLIES WHERE RUNOFF FROM AREAS OF
HIGHER ELEVATION MAY DAMAGE PROPERTY, CAUSE EROSION, OR INTERFERE WITH THE ESTABLISHMENT OF VEGETATION ON LOWER AREAS, WHERE
SURFACE AND/OR SHALLOW SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENGTH NEEDS TO BE REDUCED TO M/NIMIZE
SOIL LOSS.
3.13 TEMPORARY SEDIMENT TRAP.
A TEMPORARY PONDING AREA FORMED BY CONSTRUC77NG AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF
FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENTTO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE
THE TOTAL CONTRIBUTING DRAINAGE AREA /S LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT
MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DI VERSION DIKE.
3.14 TEMPORARY SEDIMENT BASIN:
A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED
SOIL ACROSS A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR
THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO
OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY
IMPOUNDMENT.
3.18 OUTLET PROTECTION:
STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY D/SSIPAT/NG DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL
SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE POTEN77AL FOR
DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED ST0RA4W4TER FLOWS APPLICABLE TO THE OUTLETS OF ALL
PIPES AND ENGINEERED CHANNEL SECTIONS.
3.19 RIPRAP:
A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO
PROTECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE
P07ENTIAL FOR INFIL TRA 770N, AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON COHESIVE SOILS. USE WHEREVER SOIL AND WATER
INTERFACE AND THE SOIL CONDITIONS, WA TER TURBULENCE AND VELOCITY, EXPECTED VEGETA 77VE COVER, ETC., ARE SUCH THA T THE SOIL MA Y
ERODE UNDER THE DESIGN FLOW CONDITIONS
3.20 ROCK CHECK DAMS:
SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. TO REDUCE THE VELOCITY OF CONCENTRATED STORMWATER
FLOWS, THEREBY REDUCING EROSION OF THE SWALE OR DITCH. THIS PRACTICE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT AREAS OR THE
DITCH ITSELF MAINLY BY PONDING OF THE STORMWATER RUNOFF. THIS PRAC77CE, UTILIZING A COMBINATION OF STONE SIZES, IS LIMITED TO USE IN
SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS.
3.31 TEMPORARY SEEDING.
THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WI7H APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS
TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE
THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF --SITE AREAS, AND TO PROVIDE PROTECTION TO BARE
SOILS EXPOSED DURING CONSTRUCT/0N UNTIL PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED.
3.32 PERMANENT STABILIZATION:
THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING, SEED. TO REDUCE EROSION AND DECREASE SEDIMENT
YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE COND177ONS,
AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON
COMPLETION OF CONS7RUC770N ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER.
3.35 MULCHING:
APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO PREVENT EROSION BY PROTECTING THE SOIL SURFACE
FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VEGETATION BY INCREASING AVAILABLE
MOISTURE AND PROVIDING INSULATION AGAINST EXTREME NEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED
IMMEDIATELY FOLLOWING SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED USING ORGANIC MULCH.
MULCH MAY BE USED TOGETHER WITH PLAN77NGS OF TREES, SHRUBS, OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL
STABILIZATION BY THEMSELVES, CAN BE USED IN CONJUNCTION WITH TEMPORARY SEEDING.
J.37 TREES SHRUBS. VINES & GROUND COVERS.-
STABILIZING
OVERS:STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETATIVE COVER WITH TREES, SHRUBS, VINES, OR GROUND COVERS. TO AID IN STABILIZING SOIL
IN AREAS WHERE VEGETATION OVER THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHIELTER FOR WILDLIFE WHERE WILDLIFE HABITAT IS
DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON STEEP OR IROCKY SLOPES WHERE MOWING IS NOT FEASIBLE, WHERE
ORNAMENTALS ARE DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR SOIL CONSERVATION, OR TO
ESTABLISH WILDLIFE HABITAT.
3.38 TREE PRESERVATION AND PROTECTION:
PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE
SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFEC7IVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE
BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING
CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES.
3.39 DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION AC77W77ES. TO PREVENT SURFACE AND
AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH
HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE DUST CONTROL ,MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE
AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH.
EROSION CON TR0
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HANDBOOK SPECIFICA77ON NUMBER
STRA W BAIL BARRIER 3.04
TEMPORARY DIVERSION DIKE 3.09
TEMPORARY SEDIMENT TRAP 3.13
SEDIMENT BASIN 3.14
INLET PROTECTION 3.07
SILT FENCE 3.05
CONSTRUCTION ENTRANCE 3.02
CHECK DAM
TEMPORARY FILL DIVERSION
Dl VERSION
PERMANENT SEEDING
TOPSOILING
CULVERT INLET PROTECTION
DUST CONTROL
TEMPORARY SLOPE DRAIN
SAFETY FENCE
3.20
3.10
3.12
3.32
LEGEND
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3.01
TEMPORARY RIGHT -OF- WA Y 3.11
Dl VERSION
EXISTING CULVERT
CUL VERT
DROP INLET & STRUCTURE NO.
CURB
CURB & GUTTER
PROPOSED PA VEMENT
EC -3A DITCH
DEPTH OF EC -3A DITCH
EC -2 DITCH
DEPTH OF EC -2 DITCH
EARTH DITCH
DRIVEWAY CULVERT
BENCH MARK
CLEARING LIMITS
VDOT STANDARD STOP SIGN
EXISTING CONTOUR
PROPOSED CONTOUR
PROPOSED SPOT ELEVATION
TBC DENOTES TOP/BACK OF CURB
T/B DENOTES TOP OF BOX SEASONAL NURSE CROP
FEBRUARY 16 THROUGH APRIL ANNUAL RYE
MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET
AUGUST 16 THROUGH OCTOBER ANNUAL RYE
NOVEMBER THROUGH FEBRUARY 15 WINTER RYE
NOTES:
1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL
TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32.
2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION
OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35.
Ijn-c_'� PERMANENT SEEDING SCHEDULE
EROSION 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 VR
625-02-00 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' ACTI VI TIES AND DURING
SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.
ES -8. -DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN
APPROVED WATER 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 IMMEDI,'ATELY.
General construction notes for Erosion BIId. Sediluent Control Plans
I. fl. , plan approving authority trtust be notific c9 one week. prior to the pre -construction
conference, one week. prior to the. cc?mnte?ncenient Of land disturbing activity, attcl one week
prior to the final Inspection.
' . All ero,sion and sediment control measures will be constructed and n1aintained according to
OlikliII111111 stindau ds and, specifications of the Virginia Ercasiort and. `sediment Cyotttrol
i-IandbR_xrk and Virginia Rg.4;ulltiorts VR 625.02-00 Erosion and Seditneut Control.
Regulations.
3. All erosion anti sediment control measures are: to be placed prior to or as the first step in
clears` n��.
41 A. copy of the approved erosionand sediment cxtn.trol lain shall t� maintained on (he. siw at
} � pl 1�
all urnes.
5• Prior to c:orrintencin- land disturbing activitiesin areas other than indicated on these plans
w includin;fg, but not limited to, € ff-site borrow or waste areas), th.e contractor shall subrilit a
supplementary €',rosioll control Than to the owDeFr for review and approval rov=al b y the plan
1� l Pp ) 1
approving authority..
Ci. The contractor is responsible for installation of any additional. erosion control measures
raece=,ssary to pr ov ent f rasion and sedimentation Its detenuiraedl by the plait arpprovino
authority -
7, All disturbed ateaas ,ire to drain. to approved sediment control ime asures at all tinges duritrg
tand disturbit activities and during site development until finial stabilization, is acltie,,,,ed.
8. Durinodewatterin operations, water will be purnped into an anpprovcd. filtering ciev�icki...
9, 'the- contractor shall inspect all erosion control measures peric 4call.y and ;after: each runtoff-
.roduc:ingratinfall event. Any rieCCssar rc aairs or eleanitl to maintain the effectiveness of
I' �. � p p
the erosion. control devices .stall be ittade. hilmediattely.
1(J. All fill material to be taken from art aapprovecl, designated bourovv area.
It, AlI waste matedals shall be taken to at1 approved waste area. Earth fill shall be .inert
materials only, lase of retests, stutu s.5 wood, rubbish, and othelr debris.
1 . Borrow or waste areas are to be reclaimed within 7 days of c:cmiple'tion per Zoning
Ordinance Section 5,1.28.
13. t'`cll itiet`t material,; shall be transported in cornpliance with sec:(iorr 13-301 of the Code of
Albeinaarl e.
141 Borrow, fill Or Nvlste activit involving industrial -type power equipment shall he limited to
the hours of°7:00anl to t :00pm.
15. Borrow, fill or waste activity shall lx conducted in as safe manner than maintains lateral
support, or order to tninitnize ar-y ltazacd to persons, pbvsjcal daantatoe to adjacetat land. and
improvements, and damage to any public: street because is Slides, sinking, or colt{•tpse.
16. `I.'he developer shall reserve the right to install, n-taintain, renw)ve or convert to perrnacie nt
stormwaater rnaanaa41,emen.t f t6litit s where applicable ea
It licable all erosioin. control. measures required
fay this p}alrt regatrdle ss. of the: s ale: of ally lot, unit buildin or othcl: portion of the: -property.
17. `Fecapor<arysta bilizat on sha ll be tetuporaLry seeding and Itaulcihin-.:lee-ding is to tat~ at '75
lbsAtcre, and its the niE.rilths of Septetllhe-n: to February to consiist at 50150 ttnx of Annual
Ryegras;s and Cereal Wither Rye., or in March and April to coinsist of Annual Rye, or May
throutnla August to consist of German :`Millet. Straw mulch is to be applied at 80111s/W(1sf.
Atternativrers are. subject to approved by the Cortatya erosion control inspector.
18, Permanent Stabilization shall be time and l-eilili;rer, permarerrt seeding, and rnulch.
Agricultural grade' linieistone shall be applied at illbs/1t100sf„ incorporated into the; top 4-6
inches of soil. Fertilizer shall be applied at I000lbslacre* and 1COUsist Of a 10--'fit:}-1.0 nutrient
mix. Permanent seeding sbaall beapplied at 180lbs,°stere and c:onsiyt of 95%, Kentucky 31 or
Tall }°R=scue clad tt k Perennial Ryerass or 1~ti eat:ur y Blue -crass. Straw mulch. i to be
applied sift lit}lbsllQtlsf', Alternatives ,are subject to approvedh1y thy. County,erca icln control
iris1 Lector.
14.1, Maitltenatnce: All r11e'.<asures are to be inspected weekly and After each rainfall. Any damage
or colo0ging to structural measures is to be repair immediately!, , ,Silt traps are to lea cleaned
whert 50% of the. wet Stora -e v oluine, is filled Withserdimetit. All seeded areas ;axe to be
reseeded when necessary to achieve as good stand of grass. Siilt fend: and diversion dykes
which are collecting sediment, to hall* their height., must be cle,aanted and repiire_d
iris uediarte-4y,
0' All temporary erosion and seg}irr ent control measures are to be removed within iii days o
final site stabilization, when measures are no lono'er needed, ,subject to approval by the
County erasion central i Irspe ctor.
21, This Plan shall be: void if the owner toes not obtain as permit vwitltitt 'I year of the date of
asection 17-204G.) lc1le't tt lae
21 Permanent veectation shall be itastalied can all denuded areas uvrithni nine (9) months atter
the date the land disturbing activity= commenced, (Water Protewction Ordinarttce section 17-
207B)
TABLE 3.31-A
LIMING REQUIREMENTS
FOR TEMPORARY SITES
Recommetided Applic ttiora
Fadi Test of Aorieulaaal Limestone
below 4.2 3 eons per acre
4.2 to 5.2 2 tons per acre
5^ to 6 t ton per aere
Source: 'ora. DSWC
GENERAL SLOPE (3:1 OR LESS)
KENTUCKY 31 FESCUE
RED TOP GRASS
SEASONAL NURSE CROP
TOTAL LBS PER ACRE
128 LBS
2 LBS
20 LBS
150 LBS
\V/ NO SCALE
(STD. & SPEC. 3.32 OF VIRGINIA EROSION &
SEDIMENT CONTROL HANDBOOK, 3RD ED.)
TArl LE -IJ I.11
ACCEPTABLE ` EIVIPORARY SS EDING FIAN7 MAXE.RLii 4
°QL ICX RFFERE'NCF, FOR ALL RLGIO W
R,,etc
PCilnj )4y ...?D£sx ,$
(IGS Ysr
Sept. 1 - Pett. 15 _RVQ n4ix of
tltatst,W Rtyegr.tas
(t.r iu,M mufti -f (LrP,P?.t
3
il'
ryU , 1.t0
cem'at (Wfatted Rye
$x.0.its:..�: 'x&.
reK 16 . Apr- 0 Anrtujal R5Nc (G55
60 - 101D
+at ""4?ti 4 gal..tt!1! 161.'.t1Q,Fm.ol)
M4Y t - Atig 31 German %i3:lei
:it)
fk=nd wig . t
lsour.e: Va. DSWC
DESCRIPTION OF EROSION & SEDIMENT
CONTROL MEASURES:
-
EROSION AND SEDIMENT CONTROL MEASURES.•
IT IS ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, EXISTING SEDIMENT
BASINS, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY
SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES
TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED
FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL
BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT
SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND
WHERE CONSTRUCTION ACTI VI TIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE
PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE.
SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED.
TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT
DORMANT FOR MORE THAN SEVEN DAYS THESE AREAS SHALL BE SEEDED WITH FAST
GERMINA TING VEGETA TION IMMEDIA TEL Y FOLLOWING GRADING OF THOSE AREAS SELECTION OF
SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED.
CONSTRUCTION ENTRAN E.•
C
A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF
VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD
TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR RUNOFF.
OR VEHICLES RU .
C
CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS.
SIL T FENCE.•
A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED
ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN
SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATION'S IN
ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE. TO DECREASE THE VELOCITY OF SHEET
FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE
INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUIVOFF
FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH
RAINFALL AND MAINTAINED IN ACCORDANCE WITH 77 -IE VIRGINIA EROSION & SEDIMENT CONTROL
HANDBOOK (VESCH).
PERMANENT STABILIZATION:
THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING
SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO
PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO
SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO
IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF
CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER.
TEMPORARY SEEDING:
THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING
WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND
SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE
FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO
DOWNSTREAM OR OFF-SITE AREAS, AND TO PROVIDE PROTECT70N TO BARE SOILS EXPOSED
DURING CONSTRUCTION UNTIL PERMANENT VEGETAT70N OR OTHER EROSION CONTROL MEASURES
CAN BE ESTABLISHED.
DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON AND
CONSTRUCTION ACTI VI TIES.
TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND
REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS
TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE
DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF
DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE IVESCH.
7EMPORARY DIVERSION DIKE:
A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED
AREA WHICH DIVERTS OFF-SITE RUNOFF AWAY FROM UNPR07ECTED SLOPES AND TO A
STABILIZED OUTLET, OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING
STRUCTURE. MAXIMUM EFFECTIVE LIVE 1S 18 MONTHS.
ROCK CHECK DAMS:
SMALL, TEMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE
VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF THE SWALE OR DITCH. LIMITED TO
USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS, • SHOULD NOT BE USED )IN
LIVE STREAMS.
STORM DRAIN INLET PROTECTION:
THE INSTALLATION OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP INILETS
OR CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA;
LIMITED TO DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT INTENDED TO CONTROL
LARGE, CONCENTRATED STORMWATER FLOWS
TEMPORARY SEDIMENT TRAP:
A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE
OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL
DISTURBED AREAS FOR ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE
OUT. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS.
TEMPORARY SEDIMENT BASIN:
A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWATER RELEASE STRUCTURES WHICH IS
FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT
IS USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER
FOR ENOUGH TIME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. IT CAN BE
CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY
MAXIMUM EFFECTIVE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A
QUALIFIED PROFESSIONAL.
OUTLET PROTECTION:
THE INSTALLATION OF RIPRAP CHANNEL SECTIONS AND/OR STILLING BASINS BELOW STORM
DRAIN OUTLETS TO REDUCE EROSION AND UNDER-CUTTNG FROM SCOURING AT OUTLETS AND TO
REDUCE FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE
OUTLETS
CULVERT INLET PROTECTION:
A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS
SEDIMENT FROM ENTERING, ACCUMULA77NG IN AND BEING TRANSFERRED BY THE CULVERT. IT
ALSO PROVIDES EROSION CONTROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE
ELEVATIONS AND DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES
TO BE INEFFECTIVE.
SAFETY FENCE:
A PROTECTIVE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CON7R(OL
MEASURE.
PERMANENT STABIL IZA TION:
PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS PER THE PERMANENT
STABILIZATION OF THIS EROSION & SEDIMENT CONTROL NARRATIVE.
AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF 7HE SITE WILL BE LIIMED,
FERTILIZED, AND SEEDED AS PER CURRENT VDOT STANDARDS. THIS SHALL CONSIST OF
THE FOLLOWING:
TOP SOIL - 2" DEPTH
LIME - 2 TONS/ACRE
FERTILIZER - 600 LBS/ACRE OF 15-30-15
SEED - ERNST 5311 CONSERVA 77ON SEED MIX - ERNMX-114 (45 LBS/ACRE PENNLA I WN
CREEPING RED FESCUE, 37.5 LBS/ACRE ARGILS KENTUCKY BLUEGRASS, 37.5 LBS/ACIRE
PARK KENTUCKY BLUEGRASS, 15 LBS/ACRE ANNUAL RYEGRASS & 15 LBS/ACRE PLEASURE
PERENNIAL AFTER THESE AREAS ARE STABILIZED THEY WILL BE MOWED AND MAINTAINED
ON A REGULAR BASIS.
MAINTENANCE.
IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY
AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC ATTENTION WILL BE GIVEN TO THE
FOLLOWING ITEMS
A. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN
ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK.
B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT
WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE
GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED.
C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR
DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE
REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE
TOP OF THE BARRIER.
D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS
MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED.
EROSION CONTROL NOTES & NARRATIVE
PURPOSE
THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO GRADE THE NORTHTOWN PHASE
IIB SITE FOR FUTURE DEVELOPMENT. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE
OF DEVELOPMENT IS 3.78 ACRES.
EXISTING SITE CONDITIONS.
THIS SITE CONSISTS OF AN OPEN GRASS FIELD WITH APPROXIMATE HALF OF THE SIDE
LIGHTLY WOODED, SLOPING DOWNWARD TO THE NORTH. THE SITE IS LOCATED TO THE
EAST OF ROUTE 29 AND DRAINS TO AN EXISTING CREEK ON-SITE.
ADJA CEN T AREAS.•
THIS SITE IS BORDERED TO THE EAST BY THE EXISTING GANDER MOUNTAIN SHOPPING
CENTER. TO THE SOUTH AND EAST EXISTS SINGLE-FAMILY HOMES AND A RETAIL AREA.
NORTHTOWN PHASE ! EXISTS TO THE NORTH.
OFFSITE LAND DISTURBANCE
ALL OTHER LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF DISTURBANCE AS
SHOWN.
CRITICAL AREAS:
CARE SHALL BE TAKEN TO PREVENT CONSTRUCTION RUNOFF FROM ENTERING THE EXISTING
CREEK ON SI TE.
SOILS:
SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS WITH SOILS DATA
INCLUDED WITH THIS NARRA T! VE.
SEQUENCE OF CONSTRUCTION:
1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEETING AS
REQUIRED.
2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION
PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT.
3. INSTALL THE PAVED CONSTRUCTION ENTRANCES WITH WASH AREAS AS SHOWN ON THE
PLANS CONSTRUCTION ENTRANCES TO BE INSTALLED WHERE CONSTRUCTION VEHICLE
ROUTES INTERSECT PAVED 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 PUBLIC ROAD SURFACE, THE ROAD SHALL
BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED
FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT
CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER
SEDIMENT IS REMOVED IN THIS MANNER.
4. INSTALL THE INITIAL CONSTRUCTION MEASURES AS SHOWN ON THE EROSION CONTROL
SHEET. THIS INCLUDES SILT FENCE, DIVERSION DIKES, AND A SEDIMENT BASIN.
MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP
WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE
UPSLOPE LAND DISTURBANCE TAKES PLACE.
5. IN ADDITION TO ENSURING THAT THE PAVED CONSTRUCTION ENTRANCE IS INSTALLED,
INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE EROSION
CONTROL PLAN.
6. ONCE ALL THE PHASE I EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON
THE EROSION CONTROL PHASE I PLAN AND THE INSPECTOR HAS APPROVED THE
EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS.
STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS,
DIKES, AND DIVERSIONS IMMEDIA TEL Y AFTER INSTALLATION.
Z AFTER ALL PHASE I ESC MEASURES ARE INSTALLED, THE CONTRACTOR CAN INSTALL THE
CONSTRUCTION MEASURES AS SHOWN ON THE PHASE l! EROSION CONTROL PLAN SHEETS.
MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY
LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND
DISTURBANCE TAKES PLACE.
8. THE CONTRACTOR SHALL THEN INSTALL THE UTILITIES, RETAINING WALLS, CURB/GUTTER AND
PPAVEMENT INLET PROTECTION SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND
REPAIRS SHALL BE MADE AS NEEDED. IF THE STONE FILTER BECOMES CLOGGED WITH
SEDIMENT SO THAT !T NO LONGER ADEQUATELY PERFORMS ITS FUNCTION, THE STONE MUST BE
PULLED AWAY AND CLEANED AND/OR REPLACED.
9. ONCE PHASE 11 OF CONSTRUCTION IS COMPLETE, THE S17E IS STABILIZED AND THE INSPECTOR
HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE THE EROSION & SEDIMENT CONTROL
MEASURES, INCLUSIVE OF THE APPROVED AND EXISTING SEDIMENT BASINS. NO ITEM SHALL BE
REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES
PERMISSION.
10. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND
SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM
ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL
HANDBOOK.
11. 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 07HERMSE AUTHORIZED BY THE LOCAL PROGRAM ADMINIS7RATOR. TRAPPED
SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOSITION OF TEMPORARY
MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND
SEDIMEN
TA TION.
SOIL DESCRIPTION
34C - GLENELG LOAM -77 TO 157 SLOPES, FINE -LOAMY. THIS VERY DEEP, WELL DRAINED
SOIL IS FOUND IN CROP FIELDS. RUNOFF CLASS RANGES FROM LOW ON LEVEL
SLOEPS TO VERY HIGH ON STEEP OR VERY STEEP SLOPES.
34D - GLENELG LOAM -157 TO 257 SLOPES, FINE -LOAMY. THIS VERY DEEP, WELL DRAINED
SOIL IS FOUND IN CROP FIELDS. RUNOFF CLASS RANGES FROM LOW ON LEVEL
SLOEPS TO VERY HIGH ON STEEP OR VERY STEEP SLOPES
TEMPORARY SEEDING:
ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF
TIME SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION
IMMEDIATELY FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL DEPEND
ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THAT WILL NOT
BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS.
PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE CONDITIONS
FROM TABLES 3.31B AND 3.31C. NOTE THAT TABLE 3.31B PRESENTS PLANTS WHICH
CAN BE USED WI THOU T EXTENSIVE EVALUATION OF SITE CONDITIONS; TABLE 3.31 C
PRESENTS MORE IN-DEPTH INFORMATION ON THE PLANT MATERIALS
TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO
GERMINA TE AND GROW. SEEDBED PREPARA TION IS ESSENTIAL.
AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY FOR
TEMPORARY SEEDING. TABLE 3.31A MAY BE USED TO DETERMINE THE ACTUAL NEED
ALONG WITH SUGGESTED APPLICATION RATES
FERTILIZER SHALL BE APPLIED AS 600 LBS/ACRE OF 10-20-10 (14 LBS/1, 000 SQ.
FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE INCORPORATED
INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE
IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER
ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR
HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR
OTHER ACCEPTABLE MEANS. TRACKING WITH BULLDOZER CLEATS IS MOST
EFFECTIVE ON SANDY SOILS THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION
OF THE SOIL SURFACE, ESPECIALLY IN CLAYEY SOILS, AND DOES NOT AID PLANT
GROWTH AS EFFECTI VEL Y AS OTHER METHODS OF SURFACE ROUGHENING.
SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL, CUL TIPACKER
SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO MORE THAN 1�
INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS, SHOULD BE
PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND LEGUMES SHOULD BE
PLANTED FROM 4 INCH TO � DEEP.
SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER
MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. 3.35,
EXCEPT THAT HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED ADEQUATE.
STRAW MULCH SHOULD BE USED DURING THESE PERIODS.
AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL
EROSION WILL BE RE -SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED.
STORMWA TER RUN-OFF CONSIDERATIONS:
STORMWATER MANAGEMENT.• THE STORMWATER RUNOFF FROM THIS PROJECT DRAINS
TEMPORARILY TO THE SEDIMENT BASIN. THE SEDIMENT BASIN WILL BE CONVERTED TO A
PERMANENT STORMWATER MANAGEMENT FACILITY AFTER THE DEVELOPMENT OF THE
NORTHTOWN PHASE !IB SITE
ACH 0 /- �
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U Lic. No. 03579111h1.
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TMP 45C -1-P-12 NOTES:
N/F BRUMBAUGH %
TMP 45C -1 -P -T0 TMC' 45C -1-P-11 1. THERE IS 0.12 AC. OF TREE CLEARING ASSOCIATED WITH
ZONE: R2
N/F DOLZER N/F BANCROFT THIS PROJECT. THE TOTAL LIMITS OF DISTURBANCE IS 3.78 AC.
TMP 45C -1-P43
ZONE: R2 ZONE: R2 USE: SFD
TMP 45C -1-P-9 No., 2. CONTRACTOR TO NOTE AND FLAG LOCATION OF FLOOD
N/F HAM
USE: SFD USE: SFD Z 0 N E.- R2 PLAIN AND WETLANDS. FILLING OR CONSTRUCTION ACTIVITY
N/F EMSWILER #2923
t DB 1005 PG 344 SCOT OLLINS,
#2925
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USE: SFD MAY NOT OCCUR WITHIN THE LIMITS OF THE FLOODPLAIN.
U Lie. o. 035791,��,
USE: FD DB 1630 PG 654 DB 1006 PG 681 #2921 N
CONSTRUCTION ACTIVITY WITHIN THE STREAM BUFFER SHALL
#2929 DB 1038 PG 42
BE LIMITED TO THE SANITARY SEWER INSTALLATION & k ofl
DB 2107 PG 115
[—jREE PROTECTION FENCE
SEDIMENT BASIN OUTFALL. NO OTHER ACTIVITY IS ALLOWED
IONAL
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USE: SFD
#2929
DB 2107 PG 115
EXISTING TREELIKE (TYP.)
TEMPORARY CONSTRUCTION EASEMENT
FOR FUTURE STREAM RESTORATION WORK
........ ..
A
D1
UAL
k-,
BENCHMARK'
_,:EXISTING 24" RCP BARREL, 21.8 LF
S.E.'CORNER OF CONCRETE
INV. IN=424.70, INV. OUT=421.90
SLAB AT PROPANE TANK
'
A,
ELEVATION 424.27
v
EXISTING OUTLET PROTECTION*7--<
f;
TIE-IN PROPOSED 18" RCP B)
TO EXISTING 48" RCP
J
EXISTING 20'ACSA
UTILITY EASEMENT
W/ WIRE
D.B. 1724, PG. 42
SYPPOR
V!,
PROPOSED SAFETY
ZONE: R2
USE: SFD
#2925
DB 1006 PG 681
XI/
PROPOSED WALL - SEE SITE PLAN
USE: SFD
#2923
DB 1005 PG 3441,
-TREE PROTECTION FENCE
N/F HAMILTON
ZONE: R2
USE: SFD
#2921
DB 1038 PG 42
IMITS OF DISTURBANCE (TYP.)
"H
0
SCOTT R. COLLINSZ
U Lic. No. 035791
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fill
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TYPICAL HOMOGENF-CUS
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FOUNDATION DRAIN
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"-, Elanket. drain
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M DRAIN
Scuy�ce -,SCS-Enf Fb�efd kkfflmij,,V
Figmne _k4a.Honiogeneom -Embamkinenis w/Seepage C-oufrols
DETENTION BASIN NOTE:
CONTRACTOR SHALL GRADE/ INSTALL
A COMPLETE CLAY LINING, OR INSTALL
A RUBBER MEMBRANE, COVERING
100% OF THE BASIN TO PREVENT
INFILTRATION. CLAY LINING OR
RUBBER MEMBRANE TO EXTEND FROM
THE EMERGENCY SPILLWAY CREST
ELEVATION TO THE BOTTOM OF THE
FACILITY ON ALL SIDES.
DETENTION BASIN DETAIL SCALE: 1 "=30'
4.
t; /
PROp'OS'ED,O
S�PACE,ESMT
(TYR) ,
J
DETENTION BASIN
Basin
Dim A0imt
Elevation
Volume
n
Contour
17.4
(ft)
ELEVATION
(cf)
Areas (sf)
450.5
1,607
0
452
2,527
3,075
454
3,852
9,407
456
5,288
18,509
458
5,743
29,537
PROPOSED VDOT #3 C'
AGGREGATE OUTLET PRC
w/ GEOTEXTILE FILTER
UNDERLAYMENT (2' DEE
465
StormRaxlll
Ad 4T, 114K�ri WX_ s. f:ki 12",
GONQ;�E`Fk N4ANHOLE
STANDARD 60 INCH RACK SHOWN.
DIMENSIONS IN INCHES
PLAN
Hpp�E P-�� "'u, :7 , P1 X,5TIr- 5),
?tnOo 1C SLIMIFIINE"' INC -
StarrnliaxTIA Round Series for Imusde-Manho.1-e
Par NO 1
Dim A0imt
M
0�
Mr'n 10
n
RS�2
17.4
_
1 14
0-
ELEVATION
727 -ZZ 1, 9
458 0o __ FLUS
4QX
36
- ---------
RS -48 1
27 Y
54
48
5 7
i;&w
271%j
. ......
)A Y,
I 664
613
SHALL BE USED
Plastic- Solutions, Inc.
CbNTRAC -
PC) B.A,4386, Wnchest&, VA 22604
EXISTI I NG
Wer, VA 72603
877) 8°7xasx x
,W) f4A
PROW
ELEVATION
727 -ZZ 1, 9
FIM
0+50 1+00 1+50 1+75
PROPOSED TOP OF
DAM ELEV. = 458.00'
,ADJACENT EX. TOP
OF WALL= 456.8')
ISOMETRIC
CONCRETE STRUCTURE DIMENSIONS
INSIDE STRUCTURE DIMENSION
OUTSIDE STRUCTURE DIMENSION
AVAILABLE OPTIONS
CROSS BRACINO FOR OVERHANO
HOPE ANTI -VORTEX PLATE
DATE-
DRAWil BY:
APPS 5Y:
PROPOSED 40' WIDE GRASS
LINED EMERGENCY SF`jj,LOA
, V , � -)
CREST ELEVATION7f4Sj.ob'
" �4'
(TOP OF DAM ELEV. 5h: '&
CONTRACTOR SHALL INSTALL THE BASIN & ITS
EMBANKMENT IN ACCORDANCE w/ THE DETAILS &
NOTES SHOWN ON THIS PLAN. CONTRACTOR SHALL
HAVE A GEOTECHINICAL ENGINEER CONFIRM THE
CONSTRUCTION SPECIFICATIONS ARE MET DURING
CONSTRUCTION TO ENSURE THE EXISTING
RETAINING WALL IS NOT ADVERSELY IMPACTED.
PROPOSED 24" CL. III RCP STANDPIPE
WITH TRASHRACK SHALL SERVE AS
THE RISER STRUCTURE. RISER RIM
ELEV.=455.66'. RISER TO HAVE A 05"
LOW -FLOW ORIFICE ATTHE LOW
POINT OF THE BASIN (INV. 450.50') &
FOUR (4) 06" MID -FLOW ORIFICES (INV.
454.25'). ORIFICES TO HAVE
TRASHRACKS.
—EXISTING ENDWALL &
ARMORED RIPRAP CHANNEL
PROTECTION TO REMAIN
DETENTION BASIN SECTIONJ
PROPOSED BASIN SPILLWAY SIDE SLOPES
SHALL BE 4:1 OR FLATTER TO PROVIDE A
SMOOTH VEHICULAR TRANSITION ALONG
THE ACCESS ROAD & TO PROTECT THE
GRASS LINED SPILLWAY.
460 k 460
455 455
450 450
ISTHNGX
E)'�_
URRUE IT
(PCST-CONSTRUCTION)
GRADE
445 1 1
i 1 1 445
440 1 1 440
435 435
EXISTING/
S-- ORIGINAL L
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430 430
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PROFILE SCALES
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JOB NO. (D
092029
S C ALE
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SHEET NO.
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CbNTRAC -
-OR SHALL RAISE THE
EXISTI I NG
CONC. RISER
STANDOIPE TOA
ELEVATION
458 0o __ FLUS
:4AJWTH THE TOP 0:
DAM. -A VDOT__'__
STP. MH -i TDP
SHALL, BEINST
L
LLEDONTHE
460
RISER AND IT
SHALL BE USED
AMH/ACCESS
460
!WITH THzPROPO5ED_QE_
'L
V�
LOPMENT
PR,1PO'
PROPOSED
POSED
RADE
RAID
----------
EXISTINF/
-----
CURRENT
----------
;POST-CPNSTRU�TION)
I
v Q
RADE
455
)ARSE—
TECTION
------ - -------
- ------- ...... ---------
V
'ABRIC
P MIN.)
450
450
FLOOR7
i ELEV.::
450.501
10PREVE!,41
FLOT
TION THE RISER -Bi
6E
AND BARREL CO
NECTION SHALL BE-
E -
"
FI
FIRMLY
445 18"
MLY EM BEDDED
THICK LONCRE
" INTO AIREINFOR
E FOUNDATION THAT
ED
445
JS S'x5',IAND IS B
JRIED BELOW THE
BOTTQM OF TH
-- BASIN C RADING.
PROPOSE
l51' CL. III CP 8AR
EL TO
,CONNEc
INTO EXISTING RISER
440
STRUCTURE.
t
PROPOSED 16.00'13ARREL
11
440
______1NV. 1,NF-4-4i2.00-&,,�1,NY--QUT-=445-.5j)!---
EASTING/
ORIGINAL
�E-CON STRUCTIbN)
------------- -
- -------- -------
- ----- _
G R A
D E
435--435
EXISTING
48"
RISER
---------------
-----------
------
x
430
430
C6NTRACTIOR
SHALL ENSURETHE
STR6CTURALi
INTEGRITY OF T HE
RISER,
BARREL & CON
RETE WALL AND PV
AKE ANY
N
NECESSARY
I
------ - -- ---
425
425
NV 424.7:
----------- --- _._...EXI.S_T1NG
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420
INV. 421.
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2 10'
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PROPOSED TOP OF
DAM ELEV. = 458.00'
,ADJACENT EX. TOP
OF WALL= 456.8')
ISOMETRIC
CONCRETE STRUCTURE DIMENSIONS
INSIDE STRUCTURE DIMENSION
OUTSIDE STRUCTURE DIMENSION
AVAILABLE OPTIONS
CROSS BRACINO FOR OVERHANO
HOPE ANTI -VORTEX PLATE
DATE-
DRAWil BY:
APPS 5Y:
PROPOSED 40' WIDE GRASS
LINED EMERGENCY SF`jj,LOA
, V , � -)
CREST ELEVATION7f4Sj.ob'
" �4'
(TOP OF DAM ELEV. 5h: '&
CONTRACTOR SHALL INSTALL THE BASIN & ITS
EMBANKMENT IN ACCORDANCE w/ THE DETAILS &
NOTES SHOWN ON THIS PLAN. CONTRACTOR SHALL
HAVE A GEOTECHINICAL ENGINEER CONFIRM THE
CONSTRUCTION SPECIFICATIONS ARE MET DURING
CONSTRUCTION TO ENSURE THE EXISTING
RETAINING WALL IS NOT ADVERSELY IMPACTED.
PROPOSED 24" CL. III RCP STANDPIPE
WITH TRASHRACK SHALL SERVE AS
THE RISER STRUCTURE. RISER RIM
ELEV.=455.66'. RISER TO HAVE A 05"
LOW -FLOW ORIFICE ATTHE LOW
POINT OF THE BASIN (INV. 450.50') &
FOUR (4) 06" MID -FLOW ORIFICES (INV.
454.25'). ORIFICES TO HAVE
TRASHRACKS.
—EXISTING ENDWALL &
ARMORED RIPRAP CHANNEL
PROTECTION TO REMAIN
DETENTION BASIN SECTIONJ
PROPOSED BASIN SPILLWAY SIDE SLOPES
SHALL BE 4:1 OR FLATTER TO PROVIDE A
SMOOTH VEHICULAR TRANSITION ALONG
THE ACCESS ROAD & TO PROTECT THE
GRASS LINED SPILLWAY.
460 k 460
455 455
450 450
ISTHNGX
E)'�_
URRUE IT
(PCST-CONSTRUCTION)
GRADE
445 1 1
i 1 1 445
440 1 1 440
435 435
EXISTING/
S-- ORIGINAL L
RADE
6T1O)(PRE-CDNSTRU-
430 430
99 co
425
w LU M co LO
_j _j 00
Uj wM ocr) 04 C�
co
(D Iii LL
0+50 0+75
PROFILE SCALES
111=5, (V) DETEN
1"=50'(H)
TION BASIN SPILLWAY
NH 0
FSCOTT'R. COLLINS'�
U Lic. No. 035791.11 -
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JOB NO. (D
092029
S C ALE
AS SHOWN
c
SHEET NO.
Q)
8
U)
Q)