HomeMy WebLinkAboutWPO202000041 Plan - Submittal (First) WPO VSMP 2020-09-04GENERAL NOTES
OWNER: STANLEY MAR77N COMPANIES LLC
11710 PLAZA AMERICA DRIVE, SUITE 1100
RESTON, VA 20190
DEVELOPER: STANLEY MARTIN HOMES
404 PEOPLE PLACE, SUITE 303
CHARLOTTESVILLE, VA 22911
ENGINEER: COLLINS ENGINEERING
200 GARRETT ST, SUITE K
CHARLOTTESVILLE, VA 22902
434)293-3719
TAX MAP NO.: 090000-00-00-03100 (DB 5237, PG.405)
1960 AVON STREET EXTENDED
CHARLOTTESVILLE, VA 22902
TOTAL AREA: 5.262 ACRES
ZONING: PRO PLANNED RESIDEN7AL DEVELOPMENT
ZMA 2012-0004 & ZMA2014-6)
A VARIA77ON IS BEING REQUESTED WITH THIS INITIAL SITE PLAN AND PRELIMINARY
SUBDIVISION PLAT
PROPOSED USE: RESIDENTIAL DEVELOPMENT - TOTAL 30 RESIDEN7AL LOTS
28 SINGLE FAMILY ATTACHED RESIDENTIAL UNITS (TH UNITS)
2 EXIS77NG SINGLE FAMILY DETACHED RESIDENTIAL UNIT
DENSITY: ALLOWABLE DENSITY PER ZMA APPLICAT70N PLAN: 6 DU/AC
TOTAL ALLOWABLE NUMBER OF LOTS: 30 TOTAL LOTS
TOTAL NUMBER OF PROPOSED UNITS. • 30 RESIDENTIAL LOTS
PROPOSED VARIATIONS A VARIAT70N TO THE APPROVED APPLICATION PLAN IS BEING SOUGHT WITH A WAIVER
REQUEST THAT SHALL ACCOMPANY THE REVIEW AND APPROVAL OF THIS INITIAL SITE PLAN
AND PRELIMINARY SUBDIVISION PLAT. THE WAIVER SHALL INCLUDE A MODIFICATION TO THE
LAYOUT FROM THE ORIGINAL APPLICATION PLAN, A MODIFICATION TO THE ROADWAY
NETWORK (BUT WILL KEEP THE SAME ROADWAY CONNECTIONS), A MODIFICATION TO
THE SETBACKS (BASED ON THE ROADWAY CHANGES), AND A MODIFICATION TO THE 77MING
OF THE INSTALLATION OF THE LANDSCAPING BUFFER AREAS AND SCRIM FENCE.
OPEN SPACE.• TOTAL OPEN SPACE PROPOSED = 1.328 AC (25.2%)
OPEN SPACE A: 6,850 SF
OPEN SPACE B: 50,999 SF
TOTAL OPEN SPACE REQUIRED (259) = 1.316 ACRES
OPEN SPACE TO BE OWNED AND MAINTAINED BY THE HOMEOWNERS ASSOCIATION. ALL
OPEN SPACE SHALL BE RESERVED IN A DEED FOR THE COMMON USE OF LOT OWNERS IN
THE SUBDIVISION AND NO OPEN SPACE IS PROPOSED TO BE DEDICATED PUBLIC SPACE.
BUILDING HEIGHTS: MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 30 FEET
RECREATIONAL AMENITIES PER PROFFER #8, THE OWNER SHALL PROVIDE AND INSTALL A 40'x5O' FENCED DOG
PARK WITH (2) SMALL BENCHES AND (2) ADDITIONAL PLAY STRUCTURES FOR OLDER
CHILDREN IN THE EXISTING TOT LOT AREA ON 7MP09OFO-00-00-OOA1, OWNED BY THE
AVON PARK COMMUNITY ASSOCIATION.
SETBACKS: FRONT. • 10' MINIMUM (18' MINIMUM FROM R/W OR EDGE OF SIDEWALK TO GARAGE)
SIDE. • NONE - MIN. 10' BUILDING SEPARATION
REAR: 5' MINIMUM (ADJACENT TO OPEN SPACE)
15' MINIMUM (ADJACENT TO A PROPERTY LINE)
SUBDIVISION STREETS: CURB & GUTTER
WATERSHED: RIVANNA RIVER DRAINAGE DISTRICT - NOTE.- THIS SITE IS NOT LOCATED WITHIN A PUBLIC
WATER SUPPLY RESERVOIR WATERSHED.
AGRICULTURAL/ FORESTAL DISTRICT.- NONE
TOPO & SURVEY.- THE BOUNDARY LINE AND PARCEL INFORMA7ON WAS PROVIDED BY ROUDABUSH, GALE AND
ASSOCIATES MAY 201& THE TOPOGRAPHY INFORMATION IS BASED ON FIELD SURVEY
COLLECTED IN MAY 2010. THE PROPERTY IS CURRENTLY BE SURVEYED FOR UPDATED
TOPOGRAPHY FOR THE FINAL SITE PLAN. INFORMATION FIELD VERIFIED BY COLLINS
ENGINEERING MARCH 2O20.
DATUM: NAD 83
EXISTING VEGETATION: PARTIALLY WOODED WITH (2) RESIDENCES ON THE PROPERTY AND EXISTING
GRAVEL DRIVEWAYS.
LIGHTING: NO STREET LIGHTING IS PROPOSED WITH THE DEVELOPMENT.
PARKING: PARKING REQUIRED: 2 SPACES PER UNIT + (1 SPACE PER 4 SFA UNITS)
28 SFA UNITS + 2 SFD UNITS = 60 OFF-STREET PARKING SPACES
7 ON-STREET/SURFACE PARKING SPACES
TOTAL PARKING SPACES REQUIRED: 67 SPACES
PARKING SPACES PROVIDED (MINIMUM (1) DRIVEWAY SPACE + (1) GARAGE SPACE):
OFF-STREET PARKING SPACES: (2) SPACES PER LOT = 60 SPACES
ON-STREET/SURFACE PARKING SPACES PROVIDED FOR GUEST PARKING = 21 SPACES
TOTAL PARKING SPACES PROVIDED: 81 TOTAL PARKING SPACES
PHASING: THIS PROPERTY SHALL BE DEVELOPED WITHIN 1 PHASE.
BUILDING SITES: PARCELS 1-30 EACH CONTAIN A BUILDING SITE THAT COMPLIES WITH THE REQUIREMENTS
OF SECT70N 4.2.1 OF THE ALBEMARLE COUNTY ZONING ORDINANCE.
BURIAL SITES: NO KNOWN CEMETERIES EXISTS ON THE PROPERTY.
STREAM BUFFERS: THERE ARE NO WPO 100' STREAM BUFFERS ON THIS PROPERTY. ANY STREAM BUFFER
SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION
ORDINANCE.
WETLANDS/STREAMS. THERE ARE NO WETLANDS OR STREAMS LOCATED ON THE PROPERTY.
FLOODPLAIN: THE PROPERTY LIES IN AN AREA DESIGNATED AS ZONE X AS SHOWN ON THE FLOOD
INSURANCE RATE MAP COMMUNITY PANEL NO. 51003C0407D, DATED FEBRUARY 4, 2005.
CRITICAL SLOPES THERE ARE PRESERVED SLOPES ON THE PROPERTY. MANAGED SLOPES ARE SHOWN ON
THE PROPERTY BASED ON THE ALBEMARLE COUNTY GIS MAPPING FOR THIS PARCEL.
THESE MANAGED SLOPES ARE SHOWN ON SHEET 2 AND SHEET 4 AND SHALL BE MANAGED
IN ACCORDANCE WITH THE ALBEMARLE COUNTY ZONING REQUIREMENTS.
RETAINING WALLS: NO RETAINING WALLS ARE PROPOSED WITH THE DEVELOPMENT.
LANDSCAPING: STREET TREES ARE PROPOSED ALONG THE NEIGHBORHOOD STREETS IN ACCORDANCE WITH
ALBEMARLE COUNTY LANDSCAPING REQUIREMENTS WITHIN SECTION 32.7.9 OF THE COUNTY
CODE.
IN ADDITIONAL, LANDSCAPING BUFFERS SHALL BE PROVIDED ALONG THE BOUNDARY OF THE
PROPERTY IN ACCORDANCE WITH THE APPROVED APPLICATION PLAN AND PROFFERS. SEE
THIS SHEET AND SHEET 3 FOR ADDIT70NAL INFORMATI0N ON THE REQUIRED AND PROPOSED
LANDSCAPING BUFFERS. ALL LANDSCAPING BUFFER AREAS SHALL BE INSTALLED PRIOR TO
THE FIRST CERTIFICATE OF OCCUPANCY.
TRASH: EACH LOT SHALL HAVE AN INDIVIDUAL TRASH CONTAINER TO BE STORED WITHIN THE
GARAGE.
STORMWATER MANAGEMENT • ONE UNDERGROUND DETENTI0N FACILITY AND A DETENTION POND ARE PROPOSED WITH
THE DEVELOPMENT TO ACCOMMODATE THE WATER QUANTITY REQUIREMENT FOR THE
PROJECT. WATER QUALITY SHALL ACCOMPLISHED WITH THE PURCHASE OF NUTRIENT
CREDI IS.
AVON PARK II DEVELOPMENT
VSMP PLAN
SCOTTSVILLE DISTRICT
N/F JENNIFER L
CERARDI LL
DB 4757 PC 433
TMP 90E-A2
N/F ALBEMARLE COUNTY
SERVICE AUTHORITY
DB 3571 PC 272
LpT5 I
LOT
4
LOT
3
LOT
2
LOT
I' LET
0.
LOTF
2 7
z I LOTo
To 8
aw
o uwiQ I LOT
o
0 0. LOT
z 10
LOT
11
T LOT TI
13 14 15 16
LOT I
12
TMP 90-30
N/F GARY D BROOKS JR
DB 4858 PC 406
IN FEET )
1 inch = 50 ft.
ALBEMARLE COUNTY, VIRGINIA
TMP 90E-6
N/F DANEIL
SHUMATE
DB 4091 PC 534
TMP 9OF-7
TMP 90E-9 TMP 90F 8 N/F TAN FARIS IF
DENNIS OR N/F ICNACI OR DB
4163 PC 261 1DA
V OCONNOR TARA L D 1
4184 PC 210 CARDENA TMP 9OF-Al DB
PC 77 N/F AVON PARK COMMUNITY
ASSOCIATION
INC C/O REAL
PROPERTY INC DB
3692 PC 319 2---------------------------------------- I
LOT
28
Ll
11
I
LOT 17
IL
IMPERVIOUS
AREAS: THE TOTAL OVERALL SITE IMPERVIOUS AREA CAN NOT EXCEED 377, PER
THE APPROVED ZMA APPLICA7ON PLAN: ROADS:
0.63 AC (PAVED CIRCULATION PARKING AREA = 27,380 SF) SIDEWALKS:
0.11 AC BUILDINGS/
DRIVEWAYS 1.12 AC TOTAL:
1.86 AC (35.39 IMPERVIOUS AREA) PROPOSED
USES: LOTS: 127,162 SF (2.919 AC) ROADS (
R/W & PRIVATE ACCESS ESMT): 44,200 SF (1.015 AC) OPEN
SPACE: 57,849 SF (1.328 AC) OFFSITE
EASEMEN T• ALL PROPOSED GRADING SHALL BE CONSTRUCTED ON SITE OR WITHIN EXISTING RIGHT-
OF-WAY. THERE ARE ALSO EXIS77NG OFFSITE EASEMENTS FOR
THE ROADWAY AND U77LITY CONNECTIONS TO THE AVON PARK
DEVELOPMENT. 20 TMP
90-
30A - N/F
GARY D OR MYRTLE T BROOKS DB 1191
PC 396 PEN SPACE
AREA B
50,999
SF LOT 29
40,020
SF 0.92
ACRES NOTES.• 1)
THIS
PROPERTY DOES NOT LIE WITHIN AN AGRICULTURAL AND/OR FOREST DISTRICT. 2) ONLY (
1) DWELLING PER LOT SHALL BE PERMITTED. 3) ALL
PROPOSED EASEMENTS SHALL BE DEDICATED TO PUBLIC USE. 4) STREET
TREES SHALL BE PROVIDED ALONG ALL THE PUBLIC STREETS 40' O.C. IN ACCORDANCE WITH VDOT AND
ALBEMARLE COUNTY STANDARDS. 5) THIS
PROPERTY IS NOT LOCATED WITHIN A DAM INUNDATION ZONE. MILL CREEK
VILLAGE c
HOMES
III VON PARK
SIT TMP
90-
32A N/F
ROBERT SPAULS DB 982
PC 365 0.83
ACRES TMP 90-
30B N/F
JOHN A OR RUBY T BROOKS DB 1191
PC 396 VICINITY MAP
SCALE: 1" =
2000' Sheet List
Table Sheet Number
Sheet Title 1 COVER
SHEET 2 EXISTING
CONDITIONS 3 EROSION &
SEDIMENT CONTROL NARRATIVE 4 EROSION &
SEDIMENT CONTROL DETAILS 5 PHASE
I - EROSION & SEDIMENT CONTROL PLAN 6 PHASE
IIA - EROSION & SEDIMENT CONTROL PLAN 7 PHASE
1113 - EROSION & SEDIMENT CONTROL PLAN 8 PHASE
IIC - EROSION & SEDIMENT CONTROL PLAN 9 PHASE
III - EROSION & SEDIMENT CONTROL PLAN 10 EROSION &
SEDIMENT CONTROL DETAILS & CALCULATIONS 11 STORMWATER
MANAGEMENT PLAN 12 STORMWATER
MANAGEMENT DETAILS 13 STORMWATER
MANAGEMENT DETAILS 14 STORMWATER
MANAGEMENT DETAILS 14 TOTAL
NUMBER OF SHEETS Lic. No.
035791 S308/27/
20 e SIONAL E
Oti w Q
0
l7
O
ti
CM
N
i
I
N
VJ N
N
in
zLU
LLI
I—
U)
LLI
Jlc
Q
MRw
w
1
w
F1
0
U
0
Q
w
F
w ow
a JOB
NO.
112066 SCALE
SHEET
N0.
1
V \
1
1
H 0
j:SC LISCOTNo7035
Llc71 08/
2/20. SslOA
IIIIIIIIIvvArvvvv \ v 1 1 I \ v III / I/ I I I I I I I I I I I I \-' \ \ \ II I \ \\\ \/ 1 \ \ \ \ I > z
I
0
U
ca o
Ln z
0 .
Lu
z
W I
I
I
ITMPI 90F4 I I I I I I I BUILDING DESCRIPTI NS V \
I
SS.
SANITARY
SEWER V A I NIFI DAN A \
EASEMENT \ I
I
I AI 18 X 2 STOR VINM I
y yv v V vSHUMAlE1 / I //I BRICK
HOUSE ON BASEMENT zo'
GRADING I DB. 3zga PG. 6o7 r I
I EASEMENT EXISTING z8' V / I
DB. 3291 PG. 607 nn (
f5 / / IE/P-E/P I I zo'GRADING \ \ v/B 0" 4q P 4 / /, V /
f EASEMENT V A
V A v I /
I 24x24 CONCRETE SLAB / / I / I I IEXISTING
3Y e r 6IIDB. 3zga PG. 607 I / / / TMP
90E-7 cbMUN7TY IC. I 2 x32 CONCRETE SLAB/ TMP 90—,32A 1N/F IAN FARIS \ V I I I S OCIATION N C 0 e i/ /1
TMP90E-9 TMP 90P-8 \ V I AR .SAL'PLtOPE T}I 1 I D. I 20 X201/'STORY VINvO / / l F RpBERT; SPA TLS z
a n
I CO
TRUST
LIVING
NI FI G6 DE0
11 A ADB 4163 PC 261 \ I I I Ll I!
NF
I I X C / 7 IA \ v I IDBI 3$92 P 1 s/ I / , / /
BUILDING ON iBA NT / / / D$ 982- PG 365 z.
B 5116 PC 289 CARDENAS MP
soF z F w 94 TMP 190 Ah / / / ti P
a ° DB 4060 PO 77 I I / I I I I ( / / / o ° s, III
I I I
NIF AL EVARLE OUNTY ti y i I J I FI AIV Pf Rl 0- m I I I
I / / / Y /
I o r ti 1
SER ICE AUTNO TY / / I l o - I I I / DB
3571 Pc z7z i / / / '
o , I / '' o I0ONO ! i / // I j M II / i66 o o / / o v
OVEN WIRE v / / / / ' o 0 0 V
6 g b y6 /, v N / 0 0 m m / / / r
mo + G G 96 6
h 61 6 66 6ti o g // I I I I I
4 n
N / / / h h h / / w n oOn
9 F III z / I°
b 65 6h h" " 'I
P 1 O / /
i
i / I
V / / b d / o ry S58'
48'09'E 4.92' 8'07 485. 8' 31° 2'0 "W 3 10'A / / / / / i — IF / / / 00 IPr
v X
X— %— X_
V
v / T51°
E 310. ff ' i / BE v
X— X— X— A I — ° N29'06'41"E 9.00' \ ( X— X X X X I v
v / — I \
PR
PERTY A
V
A / II1I \ I I I I I I I I I I I I WOVEN WIRE IMII
S, TYP. A V
A / I EXISTING FENCE I I E
CE \ I( I L9 I
M
I I TO
EXITING
EASE ti1E T \ S 24' CMP COMMONICATION) \ \
v
I 0) I
I
I \ TMP90-31. / I I \ \, v / \ 1 V
A 5.
262 AC \ \ \ \ \ \ I
l B. n` '\ \ \ I \ \ \ y
I I 1 \ ® rn 1 \
I I N
I I I I I I oZ\
I 1 I EX15TIN KEN41- I \ I EXIS MO b
229,211
SF \\ \\ ` \ I\ \\ TOBER yIOVED
I A I I `I I 1
I
I I 11 I TqBENE \VE
V AEXI5TING
WE L V/ A\\ V A \ E IS `- SEMENT I YoRE nAI \
v A
CONCRETET Al c 'V A \ cM cp,RCK
WA L I \ \ V A V /y. A I I A `V
A\\ o V Avv
v
vvv vv v v /d NEL M IKEI _ / v \ V
AV A
v A v O o ti
v
I V A v v SPFIALT V v
IxI
Ie'
I / /' \ V A V V A\ \\ \\ N oal
wo
A
NFAIXCET I VcoNc
ET g l '---- / II111 A.
I I \T v \ / v v
v v vv /
A d I Q zl 1968 vv
v v \ v v v v v A ti'11 XISTIN H METOREMAINk \ \ V A .' \
4 ONCR`ETEv \ vvv A v v \ V I W 0 \ ,
I / I
y /
I I \
RAVE \ \ \
s m `^ I (n 0.' WOVEN v \ /
V -- —I o o
O
n o m s mm r fi I O
o O O O1 ?\ 1 LLI
I- vv ----/ IF
MON x / I I IF INoN I O O I PLANTER -
I
I P I dELL WIREFENCEOVEROrLINEI0.281 `I TP Iv `/' /11 PIO. O PROPERTY
LINi v \ v / I I \ v - o l
rm6y ` \I I \ P / I < V °°0
86
8 ° o' . 00 0 0 6 n ^ o o a n o ro o v n o mM m m m W o N
N °v ° Q_ 69 0
o
10 ko w ko ko ,o o 0 0 0 0 / / / I ' I I
AI// / // t o_ l v WOVEN WIRE _ /
U TMP 90-30 — /
I F€Nf,' G //// //} / ' II I I I I
I I
I / / / JOHN
A
OR
RUBY T BROOKS I \ \NIF GARY
D BROOKS JR / 4.3 WOVEN i I I _ / / / / / 1 V 4858
PG 406 / / 1 I I I I I / / / l l H / l l PERT //// Lu MROPER YBONER / I/ I l / / / / 1 rD, Lu I / I I
DB 1191 PC 396 / N TMP bO-
3bA
mI — F GARY
DORIMYRhEBROOKSII I I I ' / DB 11 1
PG 396 I I I
I / I / /'// /' /Lu U)
Lu
I \ (
n
W
Q I
I
I
11 II CD CD
1 \\
EXISTING
MANAGED
STEEP- LOPES GT A,PHIC / /
SCA/E 40 / / 20 / 40
6 160IN / i inch
40 /
W a OB
NO.
112066
SCALE 1" _
40'
SHEET
NO. 2
1992
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 PROTEC7VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN
EROSION CONTROL MEASURE BY 774E 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 K1774 A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A
CONSTRUCTION SITE. TO REDUCE 774E AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF.
CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON 774E PLANS TO REDUCE 774E AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC
ROADWAYS.
3.05 SILT FENCE:
A TEMPORARY SEDIMENT BARRIER CONSIS77NG 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 774E VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL
FLOWS. 774E 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 /N ACCORDANCE NTH 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 INLET OR CURB INLET TO PREVENT SEDIMENT FROM
ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07ECTON APPLIES WHERE
STORM DRAIN INLETS ARE TO BE MADE OPERA77ONAL BEFORE PERMANENT STABILIZA7ON OF 774E CORRESPONDING DISTURBED DRAINAGE AREA.
3.08 CULVERT INLET PROTECTION:
A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM CULVERT. TO PREVENT SEDIMENT FROM ENTERING STORM
CULVERTS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07ECT70N APPLIES WHERE STORM CULVERTS ARE EXIS77NG
OR TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DRAINAGE AREA.
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 AWAY FROM UNPR07ECTED 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 TRAP OR SEDIMENT BASIN. USE
WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON S17F
DURING CONSTRUCTION. 774ESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MON774S OR LESS, WHICH CAN BE PROLONGED W774
PROPER MAINTENANCE.
3.12 DIVERSION:
A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPORTING EAR774EN RIDGE ON 774E 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 LENG774 NEEDS TO BE REDUCED
TO MINIMIZE SOIL LOSS.
3.13 TEMPORARY SEDIMENT TRAP. -
A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN
RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF 774E SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED
AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WLL BE USED NO LONGER THAN
18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DIVERSION 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 DRAINAGEWAK TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE
LONG ENOUGH FOR 774E 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 07HER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL
SECTIONS TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PR07ECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL FOR
DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWATER 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
PR07ECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING
THE P07EN77AL FOR INFILTRATION, AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL
AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE COVER, ETC., ARE SUCH THAT
THE SOIL MAY 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 PRACTICE, 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 VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL
PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WLL 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
PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETA7ON OR 07HER EROSION CONTROL MEASURES CAN BE
ESTABLISHED.
3.32 PERMANENT STABILIZATION.
THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANING 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 WLDLIFE HABITAT. TO ENHANCE
NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WLL RECEIVE A PERMANENT VEGETATIVE COVER.
3.35 MULCHING,
APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO PREVENT EROSION BY PR07EC77NG THE SOIL
SURFACE FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VEGETA7ON BY INCREASING
AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED
SHOULD BE MULCHED IMMEDIATELY FOLLOWNG SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED
USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER K17H PLANTINGS OF TREES, SHRUBS, OR CERTAIN GROUND COVERS WHICH DO NOT
PROVIDE ADEQUATE SOIL STABILIZATION BY THEMSELVES, CAN BE USED IN CON UNC77ON K17H TEMPORARY SEEDING.
337 TREES. SHRUBS VINES & GROUND COVERS:
STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETATIVE COVER WTH TREES, SHRUBS, VINES, OR GROUND COVERS. TO AID IN STABILIZING
SOIL IN AREAS WHERE VEGETATION OVER THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WLDLIFE WHERE WLDLIFE HABITAT IS
DESIRABLE. APPLIES IN AREAS WHERE 77JRF ESTABLISHMENT IS DIFFICULT, ON STEEP OR ROCKY SLOPES WHERE MONNG IS NOT FEASIBLE,
WHERE ORNAMENTALS ARE DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR SOIL CONSERVATION, OR
TO ESTABLISH WLDLIFE HABITAT.
3.36 BLANKET MATING:
INSTALLATION OF A PROTECTIVE COVERING OR A SOIL STABILIZATION MAT ON A PREPARED PLANING AREA OF A STEEP SLOPE OR CHANNEL TO
AID IN THE CONTROLLING EROSION ON CRITICAL AREAS.
3.38 TREE PRESERVATION AND PROTECTION.
PR07EC77ON OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE
THE SURVIVAL OF DESIRABLE TREES WHERE THEY WLL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION,
LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND
IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACIVIIES
3.39 DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. 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 NTH THE VESCH.
3.32
TABLE 3.32-D
SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA
Total Lbs.
Per Acre
Minimum Care Lawn
Commercial or Residential 175-200 lbs.
Kentucky 31 or Turf -Type Tall Fescue 95-100%
p Perennial RyegrassImprovedmrPrnnialRetoss 0.5%
Kentucky Bluegrass 0.5%
High -Maintenance Lawn 200-250lbs.
Kentucky 31 or Turf -Type Tall Fescue 100%
General Sl%& (3:1 or less)
Kentucky 31 Fescue 128 lbs.
Red Top Grass 2 lbs.
Seasonal Nurse Crop* 20 lbs.
150 lbs.
Low -Maintenance Slope (Steeoer than 3:1)
Kentucky 31 Fescue 108 lbs.
Red Top Grass 2 lbs.
Seasonal Nurse Crop* 20 III
Crownvetch ie 20 lbs.
150 lbs.
Use seasonal nurse crop in accordance with seeding dates as stated below:
F 1 h through Aril ................ . Annual RFebruary6ttourYghPYe
May 1st through August 15th ..................... Foxtail Millet
August 16th through October ..................... Annual Rye
November through February 15th . .................. Winter Rye
Substitute Sericea lespedeza for Crownvetch east of Fartnville, Va. (May
through September use hulled Sericea, all other periods, use unhulled Sericea).
If Flatpea is used in lieu of Crownvetch, increase rate to 30lbs./acre. All legume
seed must be properly inoculated. Weeping Lovegrass may be added to any slope
or low -maintenance mix during warmer seeding periods; add 10-20 lbs./acre in
mixes.
TABLE 331-A
LMUNG REQUIREMENTS
FOR TEMPORARY SITES
Recommended Application
pH Test of Aoiculnual Limestone
below 4.2 3 tons per acre
42 to 5.2 2 tole per acre
52 to 6 1 ton per ane
TABLE "I-B
ACCEPTABLE TEMPORARY SEEDING PLANE MATERIAL&
QUICK REFERENCE FOR ALL REGIONS"
Rate
n Dve, s.d tlaL.,B )
Sept. I - Feb. 15 50/50 M4 M
Annual RM.
a,Iaum mnw-nnmmi
so-100
CaW(w ta)Rye
s..._. .)
Feb.16 - Apr. 30 A .0 Rye . 60 - 100
n„m,m multi-rf„nm)
May 1. Aug 31 German MOla M
GENERAL SLOPE (3:1 OR LESS) TOTAL LBS PER ACRE
KENTUCKY 31 FESCUE 128 LBS
RED TOP GRASS 2 LBS
SEASONAL NURSE CROP 20 LBS
150 LBS
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.
PERMANENT SEEDING SCHEDULE PS
NO SCALE
STD. & SPEC. 3.32 OF VIRGINIA EROSION &
SEDIMENT CONTROL HANDBOOK, 3RD ED.)
EROSION CONTROL NOTES
ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION
AND SEDIMENT CONTROL PRACTCES WILL BE CONSTRUCTED AND MAINTAINED
ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA
EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS I/R
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 S1TE AT ALL TIMES.
ES-5: PRIOR TO COMMENCING LAND DISTURBING ACT7077ES 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 77MES DURING LAND DISTURBING AC77WTIES AND DURING
SITE DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED.
ES-8. DURING DEWA7ERING 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 EFFEC77VENESS OF THE
EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
General construction notes for Erosion and Sediment Control plans
1. The plan approving authority must be notified one week prior to the pre -construction
conference, one week prior to the commencement of land disturbing activity, and one week
prior to the final inspection.
2. All erosion and sediment control measures will be constructed and maintained according to
minimum standards and specifications of the Virginia Erosion and Sediment Control
Handbook and Virginia Regulations VR 625-02-00 Erosion and Sediment Control
Regulations.
3. All erosion and sediment control measures are to be placed prior to or as the first step in
clearing.
4. A copy of the approved erosion and sediment control plan shall be maintained on the site at
all times.
5. Prior to commencing land disturbing activities in areas other than indicated on these plans
including, but not limited to, off -site borrow or waste areas), the contractor shall submit a
supplementary erosion control plan to the owner for review and approval by the plan
approving authority.
6. The contractor is responsible for installation of any additional erosion control measures
necessary to prevent erosion and sedimentation as determined by the plan approving
authority.
7. All disturbed areas are to drain to approved sediment control measures at all times during
land disturbing activities and during site development until final stabilization is achieved.
8. During dewatering operations, water will be pumped into an approved filtering device.
9. The contractor shall inspect all erosion control measures periodically and after each runoff -
producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of
the erosion control devices shall be made immediately.
10. All fill material to be taken from an approved, designated borrow area.
11. All waste materials shall be taken to an approved waste area. Earth fill shall be inert
materials only, free of roots, stumps, wood, rubbish, and other debris.
12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning
Ordinance section 5.1.28.
13. All inert materials shall be transported in compliance with section 13-301 of the Code of
Albemarle.
14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to
the hours of 7:00am to 9:00pm.
15. Borrow, fill or waste activity shall be conducted in a safe manner than maintains lateral
support, or order to minimize any hazard to persons, physical damage to adjacent land and
improvements, and damage to any public street because o slides, sinking, or collapse.
16. The developer shall reserve the right to install, maintain, remove or convert to permanent
stormwater management facilities where applicable all erosion control measures required
by this plan regardless of the sale of any lot, unit, building or other portion of the property.
17. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75
lbs/acre, and in the months of September to February to consist a 50150 mix of Annual
Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye, cr May
through August to consist of German Millet. Straw mulch is to be applied at 80lbs/100sf.
Alternatives are subject to approved by the County erosion control inspector.
18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch.
Agricultural grade limestone shall be applied at 90lbs/1000sf, incorporated into the top 4-6
inches of soil. Fertilizer shall be applied at 1000lbs/acre and consist of a 10-20-10 nutrient
mix. Permanent seeding shall be applied at 180lbs/acre and consist of 95% Kentucky 31 or
Tall Fescue and 0-5%D Perennial Ryegrass or Kentucky Bluegrass. Straw mulch is to be
applied at 80lbs/100sf. Alternatives are subject to approved by the County erosion control
inspector.
19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage
or clogging to structural measures is to he repair immediately. Silt traps are to be cleaned
when 50% of the wet storage volume is filled with sediment. All seeded areas are to be
reseeded when necessary to achieve a good stand of grass. Silt fence and diversion dykes
which are collecting sediment to half their height must be cleaned and repaired
immediately.
20. All temporary erosion and sediment control measures are to be removed within 30 days of
final site stabilization, when measures are no longer needed, subject to approval by the
County erosion control inspector.
21. This plan shall be void if the owner does not obtain a permit within 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)
I1J(1?1' I ' TJ(a(i]1,T1d
ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF TIME SHALL BE SEEDED
WIN FAST GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING GRADING. SELECTION OF THE
SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR AND WLL BE APPLIED TO DISTURBED AIRES THAT
WILL NOT BE BROUGHT TO FINAL GRADE WTHIN 30 DAYS.
PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SI7E CONDITIONS FROM TABLES 3.31B
AND 3.31C. N07E THAT TABLE 3.31B PRESENTS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE
EVALUATION OF SITE CONDITIONS, • TABLE 331C PRESENTS MORE IN-DEPTH INFORMATION ON THE PLANT
MATERIALS.
TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO GERMINATE AND GROW.
SEEDBED PREPARATION IS ESSENTIAL.
AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY FOR TEMPORARY SEEDING.
TABLE 331A MAY BE USED TO DETERMINE THE ACTUAL NEED ALONG KITH SUGGESTED APPLICATION
RA TES:
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 KITH 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 EFFECTIVELY AS OTHER METHODS
OF SURFACE ROUGHENING.
SEED SHALL BE EVENLY APPLIED NTH A BROADCAST SEEDER, DRILL, CULTIPACKER SEEDER OR
HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO MORE THAN 11 INCHES DEEP. SMALL SEEDS, SUCH
AS KENTUCKY BLUEGRASS, SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. 07HER GRASSES AND
LEGUMES SHOULD BE PLANTED FROM 4 INCH TO J DEEP.
SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER MONTHS SHALL BE
MULCHED ACCORDING TO MULCHING, STD. & SPEC. 335, 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.
DESCRIPTION OF EROSION & SEDIMENT
CONTROL MEASURES:
EROSION AND SEDIMENT CONTROL MEASURES:
IT IS AN77CIPATED 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 ACTIO77ES 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
GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS SELECT70N OF
SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED.
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 774E
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS.
SILT FENCE.,
A TEMPORARY SEDIMENT BARRIER CONSIS77NG 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. 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 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).
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 SELECT70N OF THE MOST APPROPRIATE PLANT MATERIALS. TO
IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE7ON OF
CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER.
TEMPORARY SEEDING
THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE 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-SI7E AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED
DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES
CAN BE ESTABLISHED.
DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND
CONSTRUCTION ACTIVITIES.
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.
TEMPORARY 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 IS 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 INLETS
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 NTH A STONE
OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL
DISTURBED AREAS FOR ENOUGH TIME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE
OUT MAXIMUM EFFECTIVE LIFE IS 18 MONTHS.
TEMPORARY SEDIMENT BASIN:
A TEMPORARY BARRIER OR DAM NTH 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 774ERE IS SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY
MAXIMUM EFFEC7VE 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 -CUTTING 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, ACCUMULATING 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 PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL
MEASURE.
PERMANENT STABILIZATION.
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 THE SITE WILL BE LIMED,
FERTILIZED, AND SEEDED AS PER CURRENT VDOT STANDARDS. THIS SHALL CONSIST OF
THE FOLLOWING. -
TOP SOIL - 2' DEPTH
LIME - 2 TONS/ACRE
PURPOSE.•
THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO GRADE THE SPRING HILL VILLAGE SITE FOR
FUTURE DEVELOPMENT. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE OF DEVELOPMENT IS
4.25 ACRES.
EXISTING SITE CONDITIONS:
PART OF THIS SITE HAS A WOODS GRASS COMBINAT70N AND SLOPES TO THE SOUTH-EAST THE
SITE IS LOCATED TO THE NORTH OF AVON STREET EXTENDED. THE MAJORITY OF THE SITE DRAINS
TO AN EXISTING ROADSIDE DITCH OFF OF AVON STREET EXTENDED WHILE THE BACK WESTERN
PORTION OF THE SITE DRAINS OFFSITE CURRENTLY, THERE IS (1) EXISTING HOUSE ON THE
PROPERTY THAT WILL REMAIN AND EXISTING CONCRETE SLABS AND STRUCTURES TO REMAIN.
ADJACENT AREAS:
THIS SITE IS BORDERED TO THE EAST BY AVON STREET EXTENDED AND TO THE WEST BY VIRGINIA
CONSERVATION LAND. RESIDENTIAL DWELLINGS EXIST TO THE NORTH AND SOUTH.
OFFSITE LAND DISTURBANCE.
IMPROVEMENTS TO BE MADE WITHIN THE VDOT RIGHT-OF-WAY ALONG AVON STREET EXTENDED AND
A CONNECTION TO EXISTING VDOT RIGHT-OF-WAY HATHAWAT STREET.
CRITICAL AREAS.
TREE PROTECTION FENCING AND SILT FENCE SHALL BE MAINTAINED ALONG THE PROPERTY LINES TO
THE EAST, NORTH, AND SOUTH OF THE SITE TO PROTECT THE ADJACENT PROPERTIES CONTRACTOR
SHALL ENSURE THAT ALL SEDIMENT MAINTENANCE CONTROLS ARE ALONG AVON STREET EXTENDED
TO ENSURE THAT NO SEDIMENT LEAVES THE SITE AND DRAINS ONTO AVON STREET EXTENDED.
SOILS
SOILS MAP IS INCORPORATED INTO EROSION CONTROL PLAN PHASE l WITH SOILS DATA INCLUDED
WITH THIS NARRATIVE.
SEQUENCE OF CONSTRUCTION:
PHASE l:
1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEETING AS REQUIRED.
2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE SHALL BE FLAGGED AND THE TREE
PROTECTION FENCING SHALL BE INSTALLED.
J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS
WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT
4. THE PROPOSED CONSTRUCTION ENTRANCE WITH WASH AREAS SHALL BE INSTALLED AS SHOWN ON
THE PLANS. THE CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUCT70N 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.
5. INSTALL THE INITIAL CONSTRUCT70N MEASURES AS SHOWN ON THE PHASE I EROSION CONTROL
SHEET. THIS INCLUDES (2) SEDIMENT TRAPS, WIRE SILT FENCE, AND DIVERSION DIKES.
MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY
LAND DIS77JRBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND
DISTURBANCE TAKES PLACE.
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 THE MINIMUM GRADING OPERATIONS. STABILIZATION
MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS
IMMEDIATELY AFTER INSTALLATION. GRADING ALONG THE PERIMETER OF THE SITE THAT BACKS UP
TO AVON PARK I IS OF PRIORITY FOR INSTALLATION OF SCRIM FENCE AND LANDSCAPE BUFFERING
BEFORE ANY OTHER GRADING OPERATIONS.
7. 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 (UNDISTURBED) FOR LONGER THAN 30 DAYS.
PERMANENT STABILIZAT70N SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR
MORE THAN ONE YEAR.
PHASE IIA:
8. THE FIRST PART OF PHASE I1A SHALL BE TO CONSTRUCT THE OUTFALL OF SEDIMENT BASIN 1. THE
SEDIMENT BASIN SHALL OUTFALL ALONG THE OUTLET PROTECTION (RIPRAP) INTO THE EXISTING
ROADSIDE DITCH ALONG AVON STREET EXTENDED. ONCE STR-3A HAS BEEN INSTALLED THE
CONTRACTOR SHALL TIE THE TEMPORARY BARREL INTO THE PERMANENT STR-3A.ONCE OUTFALL
IS CONSTRUCTED, SEDIMENT TRAP 1 CAN BE CONVERTED TO SEDIMENT BASIN 1.
9. ONCE SEDIMENT BASIN 1 HAS BEEN APPROVED BY INSPECTOR, THE CONTRACTOR CAN BEGIN
ROUGH GRADING THE SITE TO THE CONTOURS SHOWN ON THE EROSION CONTROL PHASE 11A PLAN.
IO.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 (UNDISTURBED) FOR LONGER THAN 30 DAYS.
PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR
MORE THAN ONE YEAR.
PHASE LIB:
11. AFTER ROUGH GRADING OPERATIONS ARE COMPLETE, CONTRACTOR CAN BEGIN INSTALLING THE
ROAD AND DRAINAGE STRUCTURES AS SHOWN ON THE PLAN. INLET PROTECT70N SHALL BE
INSTALLED AS SHOWN ON THE PLAN. DRAINAGE STRUCTURES SHALL OUTFALL INTO THE SEDIMENT
BASIN UNTIL THE SITE IS STABILIZED.
12.SEDIMENT TRAP 2 SHALL BE UPSIZED TO SEDIMENT TRAP 3 ONCE SEDIMENT BASIN 1
INSTALLATION IS COMPLETE AND APPROVED.
PHASE TIC:
13AT THIS POINT THE CONTRACTOR, CAN INSTALL PERIMETER CONTROLS AROUND THE LOWER
PORTION OF THE SITE, INCLUDING WIRE SILT FENCE AND TREE PROTECTION. ONCE PHASE TIC
EROSION CONTROLS HAVE BEEN INSTALLED AS SHOWN ON THE PLAN AND THE INSPECTOR HAS
APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS
ALONG THE ASPHALT EMERGENCY ACCESS ROAD/DRIVEWAY ON THE LOWER PORTION OF THE SITE.
STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES,
AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
14. AS THE ROAD IS CONSTRUCTED, THE CONTRACTOR IS TO ENSURE THE EXISTING SINGLE FAMILY
HOME HAS ACCESS TO AVON STREET EXTENDED. THE CONTRACTOR SHALL ALSO ENSURE THE
SAFETY FENCE AND WIRE SILT FENCE SHALL SURROUND THE PORTION OF THIS LOT THAT IS NOT
TO BE DISTURBED.
15. 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 (UNDISTURBED) FOR LONGER THAN 30 DAYS.
PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR
MORE THAN ONE YEAR.
PHASE Ill:
16.ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR
CAN REMOVE THE SEDIMENT BASIN AND SEDIMENT TRAP. NO ITEM SHALL BE REMOVED UNLESS
THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. AT THE TIME OF
TEMPORARY SEDIMENT BASIN #1 "S REMOVAL AND THE INSTALLATION OF THE PERMANENT STORM
SEWER SYSTEM, THE CONTRACTOR SHALL REMOVE THE TEMPORARY BARREL CONNECTION INTO
PERMANENT STR-3A AND PLUG ITS OPENING WATERTIGHT. f7
17MAINTAIN 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 NTH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
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 ADMINISTRATOR. TRAPPED
SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY
MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND
SEDIMENTATION.
FERTILIZER - 600 LBS/ACRE OF 15-30-15
SEED - ERNST 5311 CONSERVATION SEED MIX - ERNMX-114 (45 LBS/ACRE PENNLAWN
CREEPING RED FESCUE, 37.5 LBS/ACRE ARGILS KENTUCKY BLUEGRASS, 37.5 LBS/ACRE SOIL DESCRIPTION
PARK KENTUCKY BLUEGRASS, 15 LBS/ACRE ANNUAL RYEGRASS & 15 LBS/ACRE PLEASURE 71B -RABUN CLAY LOAM-2X TO 79 SLOPES. THESE DEEP, WELL DRAINED SOILS ARE FOUND ON
PERENNIAL AFTER THESE AREAS ARE STABILIZED THEY WILL BE MOWED AND MAINTAINED GENTLY SLOPING TO STEEP RIDGES AND MOUNTAIN SLOPES. MODERATE TO RAPID RUNOFF, NTH
ON A REGULAR BASIS. MODERATE PERMEABILITY.
MAINTENANCE. 71C -RABUN AY LOAM-79' T 1 9 SLOPES. THESE DEEP WELL DRAINED OILS ARE FOUND N BUCLAYa0SaSLOESESEEESOUDOIN
GENERAL ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY GENTLY SLOPING TO STEEP RIDGES AND MOUNTAIN SLOPES. RAPID RUNOFF KITH MODERATE AND
AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC ATTENTION WILL BE GIVEN TO THE PERMEABILITY. FOLLOWING
ITEMS. - A.
SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN 72C3 - RABUN CLAY LOAM-79; TO 159; SLOPES. THESE DEEP, WELL DRAINED SOILS ARE FOUND ON ACCORDANCE
WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. GENTLY SLOPING TO STEEP RIDGES AND MOUNTAIN SLOPES. MODERATE TO RAPID RUNOFF, B.
ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WITH MODERATE PERMEABILITY. KILL
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 STORMWATER RUN-OFF CONSIDERATIONS. DETERIORATION
OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE STORMWA7ER MANAGEMENT. THE STORMWATER RUNOFF FROM THIS PROJECT DRAINS TEMPORARILY TO REMOVED
WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE THE SEDIMENT BASIN & TRAP. THE SEDIMENT BASIN AND THE SEDIMENT TRAP WILL BE REMOVED AFTER TOP
OF THE BARRIER. THE DEVELOPMENT OF THE AVON PARK H PROJECT. D.
ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED.
AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. V)
Z
0 OOk:
Ln
wVI
o z
om
Ww
UJItttL
iCOTT/
R. CU•LLINSZ Lic.
No. 035791,E 08/
27/20 _47J J
r
f
on
to
J
ar
z
F
N o
00
W
Ul
Z
J
J
0
3)
7-
M
M
N
4
M
Nt
N
CD
N
N
LU
J_
U)
LU
F-
F-
O
U
I
Y
LU
F-
U)
LU
LU
U)
F-
LU
O
O
N
z
Q
0-
CL
v
G
I
1
z
O
Q
LU
F-
9
Q
Z
J
O
F-
O
U
z
LU
0
LJJ
U)
O6
z
O
UO
LU
P
U
W
w
U)
aJOB
NO. 112066
SCALE
AS
NOTED SHEET
NO. 3
1992 3.01 Paved construction entrance for erosion control plans 1992 3.05 1992 3.05 1992 3.07 TH OF
CONSTRUCTION OF A SILT FENCE GRAVEL CURB INLET SEDIMENT G SAFETY FENCE CONSTRUCTION OF A SILT FENCE
CONSTRUCTION
STONE 7O ""'" (
WITH WIRE SUPPORT) (WITHOUT WIRE SUPPORT)
ACCESS
z
su-2A ASPHALT Too FILTER SCOTT R.
COURSE 1. SET POSTS AND
U Lic. No. 035791
EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO THE POSTS. 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH
2CLINS
EXISTINGTRENCHUPSLOPEALONGTHELINEUPSLOPEALONGTHELINEOF2% 5791,E PAVEMENT
of POSTS. STAKES.-- 16
08/2720so ct, 6'MAX. _ MEN MEN
6- MN. 2'A AGGREGATE BASE /- i 'SIGNAL E OEM ppOFIL
w 0 70'
MIN. J I / IIII J l 1 IIII / ////' _ .. - _ Ul STO1,E
I 1 I FLOW / / '- z_ CUNSi NUC'
ION A ASPHALT
PAVED /
J ACCr-, WASHRACK _ -
III III /\ O JIF /I
o i ExISPNG
3. STAPLE FILTER MATERIAL 4. BACKFILL AND COMPACT 2X 2%
PAVEMfwT- FLOW III I IIII u TO STAKES AND EXTEND THE EXCAVATED SOIL. 2% 12'
IIWN.• 4" IT
INTO
THE TRENCH. GRAVEL FILTER
1Y 0 3.
ATTACH
THE FILTER FABRIC TO THE WIRE 4. BACKFILL AND COMPACT THE 1 , RUNOFF WATER ~ WIRE MESH c FENCE AND
EXTEND IT INTO THE TRENCH. EXCAVATED SOIL. r PERSPECTIVE VIEW '
MUS EXTEND FULL WIDTH -lA POSTO ITIVE _ FILTERED WATER NT OPERATION
AND
EGRESS TRAPPING DEVICE / rT IIII
IIII ..=+4r'•.' OF _ a .
FLfF OW
12'
MIN.
POSSEDIMENT SHEET FLOW INSTALLATION DRAINAGE IIII
IIII III °.• =III -
e v e.
Z
O < $ TO / / / Y .
N
SEDIMENT
IIII o a _ • - IRAPPING DEVICE / _ / (
PERSPECTIVE VIEW) FLOW / •w
CONCRETE
GUTTER
CURB INLET !
n W J3
W'
iai
SECTION A -A A t
B
A \\& z
F- FLOW ~ y
EXTENSION OF
FABRIC AND WIRE INTO THE TRENCH. / SPECIFIC APPLICATION In Z N w1 \ > > o
Q .c 'll A nuan1MM11 Wale; tap Of I sit 11 a111LA fie MIA' ni Nllh a Ituounnin 1 Vic11 hAlILOL% W m IIII
a Qr .. 6' MAX.
a• '^w ' tll ` '^^ 4nd Off cah a ulpphlut a waKli ho.e M1th a Lhaad et of 1 ' nit Ill'% lot adoIln3le FILTER FABRIC G IIII_ \\ THIS
METHOD
OF INLET PROTECTION IS APPLICABLE AT CURB INLETS W o 5' MIN..
d'h' •°"` WHERE PONDING
IN FRONT OF THE STRUCTURE 1S NOT LIKELY TO CAUSE LOILA2111 ples>
70e. \V241 wales 11111vt lie LaitseLI awa}bull) The enitaince to an INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED PERSPECTIVE VIEW
PERSPECTIVE VIEW appl Ot'eLl selllals aea 10 t0110Pe ie(Inllelll .111 ECllnllgll II:Ip be pl ft'plt!(1 b0111IIII POINTS A SHOULD HE HIGHER THAN POINT B. AREAS. c PLASTIC FENCE
METAL FENCE enlesutu stoun c6ans, ditches oI ttatercotases 11 WIRE DRAINAGEWAY INSTALLATION II _ (FRONT
ELEVATION) • GRAVEL SHALL HE VDOT #3, ff357 OR 5 COARSE AGGREGATE. o PAVED WASH
RACK Source: Adapted from Installation of Straw and Fabric Filter Source: Adapted
from Conwed Plastics and Plate 3.01-1 Source: Adapted from Installation of Straw and Fabric Filter o Barriers forSedimentControlBarriersforSedimentControl, Sherwood and W ant Plate 3.05-1 , Sherwood and
Wyant Plate 3.05-2 Source: Va.
DSWC Plate 3.07-6 0, VDOT RoadandBridgeStandardsYCa
a19923.
07 1992 3.08 1992 3.18 1992 3.
36 1992 3.38 0 SILT
FENCE
DROP INLET SILT FENCE CULVERT INLET PIPE OUTLET CONDITIONS TYPICAL ORIENTATION OF FENCING AND ARMORING PROTECTION PROTECTION
A A TREATMENT - 1 0 2 X
4' WOOD FRAME DROP INLET (
SOIL STABILIZATION BLANKET) ° WITH GRATE
ENDWAI.L a a
d, SHALLOW W
N
1.5'
MAX. FRAME d0 '
P---- -------- --- V----
B
I oD
F NE
INGSHALPRO SLOPES, STRIPS OF O PIPE OUTLET
TO FLAT TOE OF
Flu - CULVERT - AREA WITH NO DEFINED TM SLOP PLIED CROSSERINGS DRIP LINE `
3' MIN.
i I
I
PLAN VIEW CHANNEL T
SNOW
FENCEGATHER
I 1 J EXCESS I
I
L 8 BERM I u
AT CORNERS
i BRING THERE IS A THE MATERIALEA„ P OF T OVER THE BERMAND
ANCHOR IT / c U V 0 % -'
BEHIND
THE BERM. _ L= d AIN 'AMA f
N PERSPECTIVE VIEWS f ,,,, "' Mti
N a L TOE OF
FILL SECTION A -A FILTER CLOTH KEY IN e'-9 ; RECOMMENDED FOR ENTIRE PERIMETER SLOPE STEEP1 00 Co O
STAKE 00 so M
3
SILT FENCE o ON
SLOPES, APPLY
BOARD FENCE TAM pM
O7 DISTANCE IS 6' MINIMUM
IF FLOW A 00 PROTECTIVE COVERING PARALLEL V
0 A1y 1 IS TOWARD
EMBANKMENT TO THE DIRECTION OF FLOW CORD FENCE d FABRIC
r h AND
ANCHOR SECURELY. 0 S,\,f1 (llJJl FLOW
A3dO (
MIN.)
t CE PLASTIC FENMT 1'„,N. ** d ! CORRECT METHODS
OF TREE FENCING , OPTIONAL STONE COMBINATION 1° 1
c\ vd -•i PIPE OUTLET TO
WELL ` 'Vt O i DEFINED CHANNEL
BRING
MATERIALDOWNTOA
LEVEL AREA BEFORE` I ELEVATION OF STAKE AND `I
O s• PLAN VIEW
TERMINATING
ME INSTALUTION.
TURN THE END 1 1 UNDER V AND STAPLE
AT 1Y INTERVALS. y ^' FABRIC ORIENTATION DETAIL A Lar ` V J o LEI SPECIFIC
APPLICATION
FLOW o
x -
DITCH FLav - >
Q
2 5' Lr o d
IN PARALLEL DITCHES, APPLY
PROTECTIVE LOVEFINCLIJUSECHECK TO THE DSREQUCIONIRED. OF FLOW. THIS METHOD OFINLET PROTECTIONISAPPLICABLEWHERETHESECTIONA -A USE CHELK SLOTS AS E CENTER AVOID Q JOINING H IF AT NTHECENTEROFLijINLETDRAINSARELATIVELY
FLAT
AREA (SLOPE NO GREATER PareR c,drx IO:1f IN 8"-ff': RECOMMENDED FOR ENTIRE PERIMETER _ THE DRCN IF AT ALL POSSIBLE „iw^ l _ ,pIR J o THAN 5%) WHERE THE INLET
SHEET OR OVERLAND FLOWS (NOT NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RIPRAP. GABION - AiAw ~ J_ J o EXCEEDING 1
C.F.S.) ARE TYPICAL. THE METHOD SHALL NOT N CUSS RIPRAP BASKET', OR
CONCRETE. .
0 CORRECT TRUNK ARMORING Q
a APPLY TO INLETS RECEIVING CONCENTRATEDFLOWS, SUCH AS o• VDOT 3, 357 OR 5 COARSE AGGREGATE 2. L IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED IN STREET OR HIGHWAY MEDIANS.
TO REPLACE SILT FENCE IN " HORSESHOE " WHEN USING PLATES 3.18-3 AND 3.18-4. 00 NoHIGH VELOCITY OF FLOW
IS
EXPECTEDUSINGd = 1.5 TIMES
THE
MAXIMUM STONE DIAMETERBUT NOT ,LESS THAN 6INCHES. TRIANGULAR BOARD FENCE
w Source: N.C. Erosion and Sediment
Control Source: Adapted from VDOT Standard V / z 0 Planning and Design Manual 1988 Plate
3.07-1 Sheets and Va. DSWC Plate 3.08-1 Source: Va. DSWC Plate 3.18-1 Source: Adapted from Ludlow Products Brochure Plate 3.36-1 Source: Va. DSWC Plate 3.38-2 O > O 3 1 o U TEMPORARY
DIVERSION DIKE
Q w
o
1 ct Q LU Compacted Soil
Y
Q LLI
E16' min
Flow
zo
11011111
I w >
UO z 4.
5'
min. '
I z LU
Q w I -- LU z z U) 0
JL
J wr
a N
s
0
F_ w
H
W O
W
LEI
Cr_' CLJOB
NO. 112066SCALEASNOTED
SHEET NO.
4
EROSION CONTROL 'T NRGINIA EROSION & SEDIMENT CONTROL
HANDBOOK SPECIFICA77ON NUMBER I I I I
V
SA SAFETY FENCE 3.01
o ° /
CE CONSTRUCTION ENTRANCE 3.02 I I I I I SD h0 SAF 0 m
v
TP
o /
SCOTT R. LLINS
CR CONSTRUCTION ROAD STABILIZATION 3.03
I I A V I I
I I I I
I I I I \\ V A h0 I / /
0827 20
Lic.791
SF SILT FENCE 3.05 /
I I I I I I I I I I / / 0, -v
STORM DRAIN INLET PROTECTION 3.07
I / \ I I I
I
I I I I I I / / / \ SIONAL t
OD (
D
TEMPORARY DIVERSION DIKE 3.09 / I I I I / r1 SOI TYPE DID
zC3
TEMPORARY ROW DIVERSION 3.11 I —1 I I I I
I III I
I
I I I I I I I I I I / , (J1,1\ \ 24" CMP \ I I I
I
ST SEDIMENT TRAP 3.13 \ / /
I I I ' / I I I \ I I / \ \
CIP I I I
SB SEDIMENT BASIN 3.14 \ / _ _ I I I I I \ 1 ST \
I I I I I
6' TO
OP OUTLET PROTECTION 3.18
I
I I I / / / / \ \ \ \ I I OF D M \ I I I I I \
RR RIPRAP 3.19 I I \
U
I \ \
CD `_
CONCRETE
UTILITY STREAM CROSING 3.25 \ l I I I I
OUTAREA
TS TS TEMPORARY SEEDING 3.31 \ I I V I \ \ cr v m
w In
PS PS PERMANENT SEEDING 3.32 J
LR \ I I I EXISTING GRAVEOAD I ]ail• \
W/
z
TO SERVE AS CONSTRUCTION '
I`
7` \
I \ \ \ \ \ ~
O z
TREE PROTECT70N 3.38 I / SITE ACCESS ROAD E 12x o' MI w ui
DC
DC DUST CONTROL J. 6
II \ VOBE: THIS C N TRUCTI N ENTRANCE SHALL BE vIT \ \ pp A INSTALLED, OPERATED, AND MAINTAINED I C
THE
I
I I I I \ \ \ \ \ \ CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS BM
SOIL STABILIZATION BLANKET 3.36 I
I I \ \ \ \ \ \ PROPOSED SAFETY FENCE ARE SI (A UTILI THIS CONSTRUCTION ENTRANCE. I FINAL
LANDSCAPE BUFFER AREA TO BE \ \ \ S6ILTYPE \ \ AROUND SEDIMENT TRAP \ I 0I`°II \ \ \ \ I I
PLANTED
AS SOON AS CLEARING AND I \ \ \
7z \ \ \ GRADING
OF THE AREA IS COMPLETE \ CONTRACTOR
STAGING AREA \ \ SCRIM''
FENCE TO BE INSTALLED I I I \ WITH FUELING TANK, DUMPSTER, Oo ry I
I I I PER PR FER io HEN CLEARING aODo I I
I \
AND
PORTA-POTTIES 00 co 0G AND
GRA ING OF ITS LOCATION O I \
I EXISTING
SOIL TYPE BOUNDARY \ I ( \ ` \ IIIII \ \ s I
HAS
COMP ETED " o
I o °o 00
s `j`
rn
I \\ \ \
I NOTE: POST SPACING SHALL BE A I I I I \ WIRE
MAXIMUM OF 8 FEET. HEIGHT I I \ II \ \ SUPPORT SHALL BE AT LEAST 24INCHES I \ I \ L I \ \ BUT NO GREATER THAN 34 _ I IIVDOTDBARRICADE \ \ INCHES. o 692,
III I _I \ \ \ \ ; j I \ 00
SCRIM
ENCETO qEINSTALLED PER
PR FFER igg WHEN CLEARING 1ANDGRDIN _ OF ITS LOCATION III \ I I \ — — — — \ I I
I
HAS M LETED I
I I I 9 `
I // /
I m PROPOSED SAFETY FENCE ( /6°6 0° ry
o
qo DD e^
69°/ y8i 66' / I I I D
I AROUND
SEDIMENT TRAP I \ / O o° t° SAF blk
An
o o k 6 I
1 \ \ 682
I / 6
6h o`"
I \ I \ I o 'd 68 \ r S40 '
03" 310' / / / / / / Q
4wv-hw I + + + + + ++ + + + + + + + + + + + + + + + + + + + + + + + + _
Ifillimtle)mv so,--—X--
X—XiC\---X—X— X (V+ + + + ++ + + + +. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + PS +
DA
TQ ST i-o7i i / \ V
1 \ \ I I BM I I I / / «s
N
1
I A —. i I I I I s O
IIIIW; Z L
Q Z Z30OATOTz=
TMP 90-
31 I \ C \\ , , I I \ V A
1 TS
5.
262 A > I I \ \ \ I I
I \
229,211 SF\ \ LLI Z 00 ID
LuC _ TS
I + \ \ \ \ \ \ \ \ \ \ \ \
CONCRETE WASH I I
LRS i0'WIDE \ \ \ OUT AREA OJ 1 OSF- o.
AC Q ,_I I \
I I
I \ TOP OF DAM \ \ \ \ \ 1 I-w 0 DC I
DA
T II1I I Iul) I I I
Y 1 dS SOILTYPE TSt - I I _ \ \ \ \ \ \ \ \
EXISTING GRAVEL ROAD Y I \ BM 716 \ I I \ \ , TO SERVE AS CONSTRUCTION < Z II \ I IIII + \ \ \ SITE \LESS ROAD
W II II a
I
o
I
I \
I \ \ \ \\ ; /
I
IIII I /
II
II
III
I WI/
WI
II
INOTE.
P\
OST
PACI'ING
SIHAL/L
BI
E MAXIMUM OF 8
HEIGHT
z
O IR FEET. DRAINAGE
DIVII(
TYPJ
SUPPORT SHALLATLEASTNCFLOW
DCONFLOW DIRECTIO BUT NO
GREATER THAN 34 O—ARROW (TYPINCHES. ul SITE ACCESS
ROAD wARROW(TYPGRAVEL
CONSTRUCTION
O wWRSOIL TYPE SFSUPPORT72WL
NOTE:POST
SPACING SHALL BE
A
EXISTINGSOIL
TYPE BOUNDARY MAXIMUM OF 8 FEET. HEIGHT — w I SHALL
BE AT LEAST 24INCHES 1 / I
Ln I BUT NO GREATER THAN 34 \ \ 1 I
I
I I W I, I % % '/, % % ', %I1>- ' XISTING `OIL TYPE BOUNDARY \ \ J I ,
1 I I I ~ _ ov Lu
I0000 \ I I I \ \ I
I \
I \
SF wIWI Q mm —— ---- — — -- —-- I \ / I I I I \ SUPP Ur
O CD I 00 00 C6 ° It $0
b -
ry
o '
0 6 y
N
o 0o N 0 00 - ry 0 w ry 0 00 cb co t a ry 0 00 69 `b 00 00 0 fl ^ m m
m m m ry ry ry N I \ o ID a ko ID D ko
W o w o <o 10 1 D tD OF DISTURBANCE E I
I I
I NOTE:
DRIVEWAY ACCESS TO /
OF DISTURBANCE (TYPJ NO E CO TRACTOR OENSURE / DD POSTIVE DRAINAGE ALONG / AVON ST EXT SHALL
BE
I \ \ DIVERSION DIKE/
AT ALL TIMES FOR F-
U I \ \ ) I /
RI ENT RESIDENT OF
EXISTING / / / III II / _NOTE: SILT FENCE,
SAFETY FENCE, AND SINGLE FA . DURING TREE PROTECTION SHALL BE INSTALLED CONSTRUCTION CONTRACTOR AT
LIMITS OF DISTURBANCE. THESE ARE / J I
I I I I SHALL PROVIDE ALTERNATE / GhAPH JOB NO. IC S ALE / / / TEMPORARY ACCESS FOR FFSET FORGRAPHICALPURPOSES. I
30 0 /isaoeoizo112066I I I DRAINAGE DIVIDES ARE MEASURED AT
THE RESIDENTASNE DED / / I LE SCA LIMITS OF DISTURBANCE OR DIVERSION / /
I II
I I I I I III 30, I I I
i( ch =
IN FEE ) ft.
SHEET NO. I' s
EROSION CONTROL 'I' 1IRGINIA EROSION , SEDIMENT CONTROL
HANDBOOK SPECIFICA77ON NUMBER I I I I 1
V
SA SAFETY FENCE 3.01
CE CONSTRUCTION ENTRANCE 3.02 J I ) I l I I I I 0 <°lb SAFOI \ I I I I I STR-2 & STR-i -/ h n Tp h° / / / / O SCOTT R. LLINS X
CR CR CONSTRUCTION ROAD STABILIZATION 3.03
I \ / / / I I I I I I I \ I I EBUILT PHASE
J / \
I I / / / / / / CD Lie. No. 035791 OSF
AE SILT FENCE 3.05 / / / / / "6p0 08/27/20 SSIONAL
E l lP
STORM
GRAIN INLET PROTECTION 3.07 / I I/
I I I I I i DD OD
TEMPORARY
DIVERSION DIKE J. TEMPORARY ROW
DIVERSION 3.11 I L I
I
I I IIIIIWD / i U> \ 24° CMP \ I I II I I l \
ST SEDIMENT
TRAP 3.13 / I I I I' I I I I
I I I % ', CIP SB SEDIMENT
BASIN 3.14 OP OUTLET
PROTECTION 3.18 ST I
I
I / / / / \ \
I \ _ I I OF D \ I I I I \ RR RIPRAP
3.19 CD `_ CONCRETE
UTILITY
STREAM
CROSING 3.25 / I I I I I 1 ` OUTAREA TS
TS
TEMPORARY SEEDING 3.31 I I I I _ _ \ v m w En
w En
PS PS
PERMANENT SEEDING 3.32 I I
I / l
I \ I I \ \\ - I EIEJ \ \ \ \ \ \ 0 EXISTING GRAVEL
ROAD g 1I z< TO SERVE
AS CONSTRUCTION o 7` \
I \ \ \ \ \
z
TP TREE
PROTECTION 3.38 I I /
I \ / \ SITE
ACCESS ROAD \ \ \ \ E 1z0TE:
HIS C N TRUCTI N ENTRANCE SHALL BE I W w .. DC DUST
CONTROL J. p p INSTALLED, OPERATED, AND MAINTAINED BY THE DC VCONTRACTOR.
ALL CONSTRUCTION TRAFFIC IN THIS BM SOIL
STABILIZATION BLANKET 3.36 \ I I
I \ \ \ \ \ \ \ PROPOSED SAFETY FENCE ARE SI (A UTILI THIS CONSTRUCTION ENTRANCE. I AREA TO
PLANTEDNDSCAPE ASSOONBASFERCLEARINGANDSIwI \ \ \ \ \ \ \ \ \ \ \ AROUND SEDIMENT
TRAP00 I IGRADINGOF
THE AREA IS COMPLETE FI I CONTRACTOR STAGING
AREA \ I I II \ \ \ WITH FUELING TANK DUMPSTER ' Oo \ \ I N LOCATION
OF
SCRIM FENCE y00III III
I o co AND PORTA-POTTIES INSTALLED PER
PROFFER 20 IN H00 1 a \
O
00
w
w
w
G \ r1I \
J rn
ONO \ \ \ \
I I NOTE: POST SPACING SHALL BE A I I I I \ I I
I\ \ I \ SF w/WIRE MAXIMUM OF 8 FEET. HEIGHT I I I I 1 SUPPORT SHALLBEATLEAST24INCHES \ / 0 L _ BUT
NO GREATER THAN 34 _ a VDOT BARRICADEI \ \ \ \ 1
INCHES. \
I
I o I / / 1
iLOCA ON OF SC M / / L9 I 9q' 1 FENCE
I
STALL D PERmmrdw PROFFE IINPHASEIJI
I
V I I I I , yob ° N M I \
1
CRS 6)8 DD 0
ww y906g 6 / / I wr I I M0 I I
I I \ / y ° ' o°° t°i'
SAF M Q \9 9
96 i 6
yk y- i w N I PERMANENT STR-3A TO STR-2 &STR-i y CA k 6 ,6
TP /y yy
go FOOT LONG AN m I I o O / / TO STR-
OUT ARE TO BE BUILT J 1 \ S ° I
68)tl4 &
z II
6
FOOT HIGH BAFFLES \ I \ I o `' \ \ \ \ / / AS FI ST P RT OF THISS / / 4 11 z I1 + y31 °0 '
03"
3 0' LL J Ilk S + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + ++ iCC—
X--X_—XiC \ --X—X— X c:) 1 \+ \ \ B
I
I A1 O5Ti=b.7 Al I / / m ---- N p Db -i III
WD Wa
z I- DA T SF
1 \ `DRAINAGE ID VIDE (TYP.) \ III
1 > Q z
ppp15 C \ I ; \ \ /
I DATO Bz=1z.75A C 63979 i —y--HL---- / J J 0 A \T5.262
AC D \ , TS 11
A
DC \-/
I I \ 9. 9 6' IDE OP (F D 7 I I U) z C4 229,211
SF\ \ \ 1 w W
7I
I \\ \ A \_ wtWINO POST POST
SPACING SHALL BE A\ \ \ CONCRETE WASH 1 Q — 1 \ CRS SF
SU PORT SHAIRE
LLUM OF 8FEET. BEAT LEAST 24
FEIGHTINCHES OUT AREA1 J LJ 1 \ I I
I I I I I I \ \ \ BUT NO GREATER
THAN 34 \ 1 Q W INCHES. \ \ 1 _ PROPOSE
AFETY FENCE
U CE \ \ \ / \\ \ \\06 AROUNDSEDIMENT
BASIN\
EXISTING GRAVEL ROAD 1 I I
I BM \ z yo FOOT LONG
AND \ \ \ ' TO SERVE AS
CONSTRUCTION — I I 11
I \ I I I I F 6 FOOT HIGH BAFFLES \ SITE ACCESS ROAD \\
O H H b1w/WIRE
O 00 U
z
I I 1DCI
FLOW DIRECTIO
WD x \ \ , I \ \ \ / I
I
I
I
I ARROW (TYPJ x I GRAVEL CONSTRUCTION I I I 1 I \ I \ \ \ O
w SF SUPPORT SITE
ACCESS ROAD / / /
I I I I / \ \ \ \ \ LLu 11 > 1 NOTE: POST
SPACING
SHALL BE A / MAXIMUM OF 8
FEET. HEIGHT — SHALL BEAT LEAST
24 INCHES I I \ \ \ cn w I II I
1 BUT NO GREATER THAN 34 \ \ / ' I I I
I
I I _ I % % '/. % % ' %I
1 1- ' \ U) 1\\ INCHES. / I
I I I
I W / I \ I \ F-
Q I1 f/ID
It I I I
I I
I I \ I IID v I I I I ! I I • \ I I \ I I \ I \ SF I a I \ / I IIISUPPII5 °
1
0' W 107 .99'(T) \ O V I w
O
0 00
Ir
It vw 0 00 w l0
tD l0 w rn M M60 o w / w w
w w w w w w 10 1 w w
I I
II \ \ \ \ \ \ SAF / / / / / / / / /
I I I PROPOSEDILIMITS I I I I NOTE: DRIVEWAY A Ct55
TU / OF DISTURBANCE (TYPJ NOtECOTRACTOROENSURE / DD POSTIVE DRAINAGE ALONG /
AVON
ST EXT SHALL
BEzz / / DIVERSION DIKE MAINTAINED ATALLTIMES
FOR / / F OME. DURING 0
Lu
NOTE: SILT FENCE, SAFETY
FENCE, AND / CONTRACTOR RESIDENT OF EXISTING
TREE
PROTECTION SHALL BE
INSTALLED I I I I I / CONSTRUCTION NTR CTOR / / / / / / / AT
LIMITS OF DISTURBANCE.
THESE ARE / I I I I I SHALL PROVIDE ALTERNATE / G AP41C S ALE/ cos No. OFFSET FOR GRAPHICAL PURPOSES. / / /
I I TEMPORARY ACCESS FOR / 112066 o DRAINAGE DIVIDES ARE
MEASUREDATTHE / / J I I I I RESIDENTASNE DED I3o / is 3o so / / 120 I I — _ LIMITS OF
DISTURBANCEOR DIVERSION / I I I I / DIKE. / / / IIIIIi1uSCALE = 30 I / cft. Ih
FE )
Il /
SHEET 6NO.
1IRGINA EROSION , SEDIMENT CONTROL
HANDBOOK SPECIFICA7ON NUBEREROSIONCONTROLIIIII
V
SA SAFETY FENCE 3.
01cb
CE CONSTRUCTION ENTRANCE 3.02 J I ) I I I O o°° 4)
Tp
SAF ° m rn
pp LINS h h n h°j / / / / O SC R. L
CR CR CONSTRUCTION ROAD STABILIZATION 3.03
I \ / / / I I I I I I I I I I \ / J = CD LiNo. 035791 "
SF AE SILT FENCE 3.05 / \
I III I I I
I I I I I / / r / / / /
I I I I / / "6p0 08/27/20
SSIONAL t
lP STORM DRAIN INLET PROTECTION 3.07
OD TEMPORARY DIVERSION DIKE 3.09 /
I I/ I I I I I / — / 1 _ _ _ _ _ _ _ _
0p
I \ I I I / I
TEMPORARY ROW DIVERSION 3.11 I
I I I I I I I I I
I I
I
WD /
Ag \
24" CMP
ST SEDIMENT TRAP 3.13
SB O SEDIMENT BASIN 3.14
OP OUTLET PROTECTION 3.18
I IIII \ \ I I I
oFo \ \
I I
I
I I\
RR RIPRAP 3.
19WASHIIIII \ \\\ I II
CD `_ UTILITY STREAM CROSING 3.25 l / I I I I I 1 ` CONCRETE
OUTAREA IO
TS TS TEMPORARY SEEDING 3.31 v m
t
PS PS PERMANENT SEEDING 3.32 \
I I I I / l I I I I I / \ \ \ \ \ \ 1V
EXISTNG GRAVELIROAD Til• \ I
0
H TO
SERVE AS CONSTRUCTION 7/` \ \ \ \
z
TP
TREE PROTECTIONSITE ACCESS ROAD J. I I / 4iz' INOo MI w ITE:
PHIS C N TRUCTI N ENTRANCE SHALL BE W DC
DC DUST CONTROL 3.39 \ \ \ \ INSTALLED, OPERATED, AND MAINTAINED BY THE MJ IIII \ \ \ \ \ CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN BM
I
I
I
I
I
I
I
I
I
I / /\ II
IIIIIII I
II III O I
IT IHrrIICE.
SOIL
STABILIZATION
BLANKET 3.36 ARE S(A UTI`I THISCONSTRUCTIONENTRAN FINAL LANDSCAPE BFER AREA
TO S PROPOSED SAFETY FENCE PLANTED
AS SOONASCLEARING AND
OUND SEDIMENT TRAP I
I GRADING OF
THE AREAISCOMPLETELOCAIONOFSRMFENCE
CONTRACTOR STAGING AREA UELINGTANK
DUMPSTER CID IORTA-
POTTIES 00,
INSTALEDPERRO\°
HAc;F p O o
0ko rnI
ID I
I I
NnI
I
Lf.
I '
NOTE:
POST
SPACING SHALL
BE
A I I I I \ SF w/WIRE MAXIMUM OF 8
FEET. HEIGHT I I I I 1 SUPPORT SHALL BEAT LEAST 24 INCHES / O L \ _ BUT NO GREATER THAN 34 _
a VDOT D RRICADE I \ \ \ \ 1 INCHES. \
I II
o
Gs.
2 I I I I
II \ _ I
00
I / , iLOCA ON OF SC M /
I \
94' 1 - FENCE I STALL D
PER / CA
PROF
io FN PHASE I I
PROPOSEDTEMPORARYz5" CMP I I
I \
WD CONNECTION BETWEEN PERMANENT
STR-5AAND STR-4.
LENGTH=33.8', 0 \ G96 m 6I g / I I 0
INVERTIN=
665.So,
INVERT
OUT SLOPE=3.
00%
66. DDSAF CMMNA69G 66 683°Av
o FOOT HIGH BAFFLES S / coTl
I + + ++++++++
pS + +++ ++
O I — I I I
I B
I I A TOIST _ .
71 AC ( Db z-
m - - -
w N j II I I IP I
N
I 1 _ IPIIIIIIII1 T I -_ WD / ' Q z DATOSF 1 - Ts I
I I I I I a
Q z 15 ikc V I Ts I I D TOISB i =
z.7 AC = -`- = - Lu J
30 J V I 1 I DC I \ \ I I
T5.262
AC
mp 1 D A \ % > 0 - 9. 9 Dc I \ I '
cn I \ 6 WDDE
T
P OFAM I \ I \ IIIIIIBi\ \ IP229,211 SF\ \\ \ % w w I I I IP I 6 . I I \ \ \ \ \ \ \ 1 , 1IPIPI \ NOUTE: POST SPACING
SHALL BE A\\
CONCRETE WASH ~ i i i i i i NO GREATER THAN 34 \ % \
1 I INCHES. H (i 06
PROPOSED SAFETY FENCE I \
W YI
1 i
AROUNDSEDIMENTBASIN \ \EXISTING
GRAVEL ROAD LLII1FLOWDITV4FOOTLONG ANDI \ \ \ \ ' TO
SERVES S CONSTRUCTION 1 DC _ I I IP ARROW ( I SITE ACCESS ROAD
I
I 6 FOOT HIGH BAFFLES
I _ I I I
I I -- IP I I I I
I ' I wD I I
I I I l i +, V I z o IGRAVEL CONSTRUCTION I I I I \
O w 1 I
I I I SITE ACCESS ROAD I \ \ \ ~ TSIi / LLI i Lu Q m i
1 \
I I U) w ` 1
DC , , . , , , CS 0
ID Lu
toL Q 2
I------ I
I 0000 II / / I I
I \
I Iw/WI I I I / I \ I I I 1 I \ I \ SF Q RIFa.RIF M M I I \ / I I I I
I \ SUPP C I I 5 0 W 107 .99'(T) I O
I
A 00 (5 6 I O I 6' W
b N
O6NO
O]
t0 -'
N O [O lD N O W b N O W cb (O S .t N O 00 O p \ 6O \ \ 690 W 1 ^ l0 LD tp LD Lfl
V1 M M M M M o ko w / o w Io o I o w
o O O o b
o
I
I
1 \ S> w/WIRE RAINAGE DIVIDE (TYP.) SAF — _
OF DISTURBANCE I I I I
I NOTE: CONTRACTOR 4O
ENSURE NOTE:
N ST E A' ACCESS
BT / u PROPOSED AEON
IV
WA SHALL / I/
BANCE (TYP.) I _ / /IPOSTI
DRAINAGE
ALONG MAINTAINED
AT
ALL TIMES OR
I
NOTE: POST SPACING SHALL BE A \ I I DIKE
EXISTING
SINGLE FAMILY HOME. / / / / I SUPPORT I
DID
DIVERSION
I DURING CONSTRUCTION OF / "' F- W I MAXIMUM
OF
8
FEET. HEIGHT / / / / NOTE. SILT FENCE, SAFETY
FENCE, AND I I ASPHALT DRIVEWAY,
TREE PROTECTION SHALL BE INSTALLED CONTRACTOR SHALL PROVIDE I SHALL
BE AT LEAST 24 INCHES / / AT LIMITS OFDISTURBANCE. THESE ARE J I I I I I ALTERNATE TEMPORARY ACCESS G AP41C S ALE/ / / JOB NO. BUT NO GREATER THAN 34 / I I I INCHES. '` _ _ — — DRA
NAG DIVDESARELM AS REDATTHE I
I
FOR I 30 / 0 /is ao eo izo 112066 I SCALE I
LIMITS OF DISTURBANCE OR DIVERSION 13
01DIKE. 0 IN FEE ) SHEET EET NO.
1 /nch = ft. 7
1REROSION , SEDIMENT CONTROL HANDBOOK
SPECIFICA7ON NUBEREROSION CONTROLIIII1V
SA
SAFETY FENCE 3.01 I
I I u I I I / I
I I I 1 I I I CE
CONSTRUCTION ENTRANCE 3.02 J I ) I / I I I 1 So o°° oO m m SCOTT
R. LLINS OCRCONSTRUCTIONROADSTABILIZATION3.03 I
I \ \ / / / I I I
I " DIDTP 20
2708 /SAF / / / _
C Lic•791 SF
A" SILT FENCE 3.05 i / I
I I I I I I / j I I I I / / \ / / o / / O \ // I ' I I I I I I I / / / SSIONAL I& - lP
STORM DRAIN INLET PROTECTION 3.07 / I
I/ I I I I I 1 1 I I I I I / /
OD (
D
TEMPORARY
DIVERSION DIKE 3.09 / I
I/ \ I I I I I \ / — / 1 — Op
1
1 I I I / I TEMPORARY
ROW DIVERSION 3.11 I I I
I I I I 1 I I / 24"
CM fA
P
I I I I I I I V, c
i
I I I ST SEDIMENT TRAP 3.13 I
SB
SEDIMENT BASIN 3.14 OP
OUTLET PROTECTION 3.18 1 OF \ \I
I I
I \
RR
RIPRAP 3.19 CD _
CONCRETE
UTILITY
STREAM CROSING 3.25 I I I I OUTAREA
I A z
a
TS
TS TEMPORARY SEEDING 3.31 \ I I V I \ I \ \ \ \ \ v m L
PS
PS PERMANENT SEEDING 3.32 I
III / A I I I \ 00 'I A \ V A \ zo
TP
TREE PROTECTION 3.38 \ 4iz'x7 MI \ \ w " H
HH H HHH DC
DC DUST CONTROL 3.39 I
I / PHIS C N TRUCTI N ENTRANCE SHALL BE W n DD \
INSTALLED, OPERATED, AND MAINTAINED BY THE I EXISTING
GRAVEL ROAD \ CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS BM
SOIL STABILIZATION BLANKET 3.36 \ I
I I I \ TO
SERVE AS CONSTRUCTION PROPOSED
SAFETY FENCE ARE
SI (A UTILI THIS CONSTRUCTION ENTRANCE. I FINAL
LANDSCAPE BUFFER AREA TO BE I I \ \ \ \
SITE
ACCESS ROAD \ \ \\ OUND
SEDIMENT TRAP \ \ 1 PLANTEDASSOONASCLEARINGAND00I \ \ \ \ I \ \
I
GRADING
OF THE AREA IS COMPLETE I I 1 I \ \ \ CONTR CTOR STAGING AREA \ I I
I p A WITH FUELING TANK, DUMPSTER, ' OD \ LOCATION
OF SC IM FENCE I \ \ \ \ V
AND
PORTA-POTTIES \ ro ° CID
rr
III (\ I \
1 I INSTALLEDPERPROFFER20IN I
I 1 I I / I III I
N
po viSp, OO NOTE: POST SPACING
SHALL BEA OI I I
1
I
I \ I \ SF
w/
WIREMAXIMUMOF8FEET. HEIGHT I I I I 1 SUPPORT SHALL BE ATLEAST24INCHES / 0 L _ BUT NO GREATER
THAN 34 a VOID D BARRICADE I \ \ \ 1 INCHES. C\ \
I
I
o
I
I \ I 1
IiLOCA ON OF CI \
I I I \ 94'
FENCEI
STALL PER \ / L9 I 1 I \ 1 PROF
io !N PHASE I \ I O I I WD I I
I I
I , / o a ry I `o yo6 0 N 6)8 0 ' 690 i
6gi 66
G6k 6y /
n I o I I I I I O o°°
oq' 1 `An rn
o 4
Gg o
FOOT
LONG
AND
m
I I ° SA N 1 1 Gg z
6
FOOT HIGH BAFFLES I I o \ / / / / / DD / M T \ 31 0 03 3
0 \ \
Q J 5 + + + + + + + + I + + + + + + + + + + + + + + + + + + + + + + + + + + I _ x—
x—
c pS + + ++ O
1 /5.. I
I + + + I+ +
I \ _ _ I 1 I I qA TO ST - .od C I DD u/ y \ m — — — N O IP
1 I 1 N
IP I A I I
I I I I z DATOSF 1\ - Ts / I
Q
z 15 C 1 I D
TOISB i- z.7 AC I I I I TS 1 — 1 w J111I I DC
I TMP 90-31
V A '/, — 9. 9 5.262 AC ,
D I \ I c \ I , cn 11 III N \' W1 DE TOP OF
pAM
229 1 'F' \ \ \ DD w H H CC IP CONCRETEWASH
Q i
I 1 \ I IL9S
1 0 I 1 \ \ SUPPORT \ \ \ \ l — NOT
POST
SPACING SHALL
BEE A \ \ \ 1 < MAXIMUM EHEIGHT SHALL BE
cATLEASTay4INCHESBUTNOGREATER \
I 341NCH\S. \ PROPOSED SAFETY FENCE U \ \ 1
I BM
AROUND SEDIMENT BASIN 1
A ` 1 1 DC IP F 6 FOOTHIGH
BAFFLES
GRAVEL CONSTRUCTION \ I I I I --/ IP
I I
I I I I
SH E ACCEI S ROAD WD I I I I T_ _ EXISTING
GRAVEL
ROAD U) z O TO SERVE AS CONSTRUCTION I I
IrLJJSITEACCESSROADTSITS \ / I1 % \ \ \ Lw \\ / I
Q 1 U) w I
II JH
Q I
1 - f LLJ I I i
1 _\ nc-- 010 II / I I I I
I \ SF SwlWIl UPP Q NOTE: DRIVEWAY ACCE S TO \ Q
I
5 °1 W 07 .99'(T)
AVON
ST EXT SHALL BE 1 O MAINTAINED AT ALL TIMES FOR 1 p \ 6 p i l I
N I d'
6 p b o ry
o
06 ti o co Io -t N o co ry o w N o co EXISTING SINGLE FAMILY HOME. y a t a N o ao w 69 Cb 4D W CO ^ 0 V1
0 V) 0 o w DURING CONSTRU T o 0
0 0 w/WIRE RAINAGE DIVIDE (TYP.) _ / PROPOSED I
I I
I I ASPHALT DRIVEWAY,
ko w I I \ — I
NOTE: CONTRACTOR
7O ENSURE
ALTERCONTNATE
ACTOR
SHALL
PROCCE \ 1 SAF / / LIMITS
S-
F I I \
DISTURBANCE (TYP.) I
DD ALTERNATE
TEMPORARY ACCESS / \ I I SUPPORT \ _ _ _ / / OF I POSTI DRAINAGE
ALONG / l /
w
NOTE:
SILT FENCE, SAFETY/FE/NCE,
AND
I DIVERSION DIKE FOR RESIDENT w F
VE DRA I
NOTE. POST
SPACING SHALL
BE A / / / /
I I I I ( J / / / / / \ \ a LU I MAXIMUM OF 8 FEET. HEIGHT \ / TREEPROTECTIONSHALLBEINSTALLEDI ' \ I SHALL BE AT LEAST 24INCHES / / / \ ATLIMITSOFDISTURBANCE. THESE ARE I I I I I I I G AP41C S ALE/ / / JOB No. BUT NO GREATER THAN 34 DRAINAGE DIVIDES
ARE MEASURED AT THE I
I INCHES. / / / / OFFSET FOR GRAPHICAL PURPOSES.
I I I
I I I I I l
ao /
o /is ao so / / rzo 112066 LIMIT1 SCALE KE.S OF DISTURBANCE
OR
DIVERSION / / / / I
I
I I I I / ' I I 1„ _ 30 1
IN FEE ) ! SHEET
NO. 1 ch =
C
ft. 8 H
11ROINIA EROSION & SEDIMENT CONTROL
HANDBOOK SPECIFICAION NUMBERCONTROL
v w/WIRE / / / /
SF SUPPORT OF%
J% SA SAFETY FENCE 3.01
CE CONSTRUC77ON ENTRANCE 3.02
s8
I
I
IIII
II
IyII
I
II
II
II I
I
IIII
II
IIII
IIvI
IIIIIII
I1I
II71Imo\
rvBI>
I
E
I\ \ \
i
s
I
WOzon
S
C
OSJH^
NTS" TO
NJ_UOdYL.
1_
R
a GLlI'
VzQJ1YQ—
N
S4/
CONSTRUCTION
ROAD STABILIZATION
3.
03 CD Lie. No. 035791,E TP RIP RAP CHANNEL
SlL T FENCE SEE
CALCULATIONS PACKET .60 08/27/20 3.05 3.07IONALE
Q .. .. .. .. .. .. .. STORM
DRAIN INLETPROTECTIONTEMPORARYDIVERSIONDIKE3.
09 TEMPORARY ROW DIVERSION 3.
11 \ SEDIMENT TRAP 3.13
24" -,MP 98 CIS
SEDIMENT BASIN
3.14
IP OUTLET PROTECT70N 3.
18
N RIPRAP 3.19 CONCRETEWASH
UTILITY STREAM CROSING
3.
25 OUTAREA TEMPORARY SEEDING 331 v
w En PERMANENT SEEDING
3.32
wzO TREE PROTECTION 3.38
zw a DUST CONTROL
339 :'HISCN
TRUCTI ENTRANCE SHALL
BEui O\ ALLED, OPERATED, AND MAINTAINED
BY THE CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN
THICE.SOIL STABILIZATION BLANKET 3.36ARES(A UTILI THISCONSTRUCTIONENTRAN LANDSCAPEFINAL BUFFER AREA TO E
PLANTEDASSOONASCLEARINGANDGRADING
OF THE AREA IS
COMPLETE CONTRACTOR STAGING AREA WITH FUELING
TANK, DUMPSTER,' LOCATI
N OF SC IM
FENCE AND PORTA-POTTIES0 CID INSTALL PER P OFFER 20IN °
Ol 00 00 aVDORRICADE 69.
200w/
WIRE
NOTE:
OSTSPACING—SSHALLBEA
SIF SUPPORT
MAXIMUM OF8
FEET. HEIGHT LOCA
ON SC MSHALL BE AT LEAST
24INCHES FENCE[ STALL/L9BUTNOGREATERTHAN34INCHEPROPOSEDLIMITS
OF PROFFE PHASE] DISTURBANCE=4.
z5 ACRES M yob 6v6y di
cCwSAF ~I° 211 wCz
e °
SAF
S ° &'
6g40, 8
7 03"
3\
0, \ //
694
694 69z
9z 2
N IP IP >p LLu 00 TMP
90-31
ygo yy5.
262
AC (
nw u
y229,
2
1
SF\ W _664 71\
P X 04 CONIC 0 I
662
OUTAREA
1 LJzCG i J 0
I— REQ SF SUPPORT z608 S
P
STSPAC NGSHALL BE A
O
MAXIMUM
OF 8
FEET. HEIGHT
6zo Q 656
SHALL BEAT LEAST 24 INCHES —x—xxW<
z BUT NO GREATER THAN 34
p
INCHESr 6iz 654 AF D z
V) IP 624 ulU
OpLn I s 6 WW CID
w
O
WCA 686
a ° Oo WO
O < 86 686 IP688
IP Q 5 °
1
0'
W 07 .
99'(
T) O s9ONOTE:
DRIVEWAY ACCESS
TO
N 0
w
c N o CO It ry 0
o
o m m°Cb/ 00 LID ,0
AVON ST EXT SHALL BE w SAF OPOSED
LIMITS MAINTAINED
AT
ALL TIMESFORPREXISTING
SINGLE FAMILY HOME. w/WIRE OF DISTURBANCE (TYP.)
DURING
CONSTRUCTION OF
FSUPPORT ASPHALT DRIVEWAY, TE: POS
ACIN/ CONTRACTOR SHALL PROVIDE NG SHAL E
MAXIMUM OF 8 FEET. HEIGHT NOTE SILT
FENCE, SAFETY
FENCE, AND ALTERNATE TEMPORARY
ACCESS SHALL AT LEAST °b TREE
PROTECTION SHALL BE INSTALLED FOR RESI
ENTI BUT NO GREATER THAN 34 LIMITS OF DISTURBANCE.
THESE ARE I
CHES.
GjAPqIC s ALE/ cos No. R GRAPHICAL 30 0 /15 30 0 120
112066 DRAINAGE DIVIDES ARE MEASURED AT THE SCALE LIMITS OF DISTURBANCE OR
DIVERSION I /
I '' DIKE. / IN FEE 1— 30
SHEEP
NO. 1 Inch = 0 9 It.
rn
OnID PROPOSED SAFETY FENCE
AROUND SEDIMENT TRAP
ID
rn
VI
t 1
Ilk
to
o
I I
11 A N r
o
M fir•
LL•
O1, O 1 11
6 n
LT
TOPOFDAM
LI
1 : : •IIIIII
SEDIMENT TRAP #1 DETAIL
SCALE: 1"=20'
NOTE: SEDIMENT TRAP i WILL BE CONVERTED TO A
SEDIMENT BASIN ONCE OUTFALL PIPE HAS BEEN INSTALLED
Table 16: Sediment Trap design (spec 3.13) J /
I
h SAF h°`° 15 h \ / TP
I h
pp-- SOIL11TYPE DID
I
ST
c
6T
OF D M I
11
CONCRETE WASH
OUTAREA
F
LROAD ,
Sediment Basin Design #1
SEDIMENT TRAP #2 DETAIL
SCALE: 3."=20'
MIN.1'WISPLLWAY
CREST OF EMERGENCYdrainagearea (acres) 2.75 P'WITHOUT SPILLWAY
basin volumes: (using 2' contour intervals) DESIGN HIGH WATER
elevation (ft) contour area (so volume(cy) (
1`-R STORM M.)
632.00 1328.0 0 °S'
I -------- -----
lY1
634.00 1944.0 120
MIN. 1 0
RISER CREST
J/ 0 00
1D
g RISER TO INCLUDEA6"DEWATERIMELEV= °
636.00 2661.0 290 .50 E DENAmeNc AT TIME OF TEMPORARY SEDIMENT TRAP#i'S
PROPOSED TEMPORARY z CMP RISER / /
yv °
E I REMOVAL, THE CONTRACTOR SHALL REMOVE THE
J / / j v
D 6 7.79'. RING
ry
0 638.00 3478.0 517 . STORAGE TEMPORARY BARREL CONNECTIONS INTO
ORIFICE (INV ELEV.=635.i8) & A TEMPORARY AT TIME OF TEMPORARY SEDIMENT BASIN #>'S 0.00 0.0 0 PERMANENT STIR. i AND OUT OF
a
Lo I I TRASHRACK. RISER SHALL BE FIRMLY ANCHORED REMOVAL, THE CONTRACTOR SHALL REMOVE THE 0.00 0.0 0 PERMANENT STR.& PLUG ITS OPENING
SEgM.T STOWC OR POINT WATERTIGHTIITOPREVENTFLOATING. RISER TO BE SET IN A TEMPORARY BARREL CONNECTION INTO (' WET STORAGE REWceD
MINIMUM OF 30" OF COMPACTED SOIL OR PERMANENT STIR. 3A & PLUG ITS OPENING
0.00 0.0 0 ro a, C.Y./ ACRO I \
AGGREGATE VASE OVER A 8'X8'XY4" THICK WATERTIGHT TEMPORARY CONNECTION FROM PERMANENT
GALVANIZED STEEL BASE PLATE OR SET 6"
O C 5 o FOOT LONG AND ao / STR-2 TO PERMANENT STR-i.
r 3
o a INTO AN 8'X8'Xi8" THICK REINFORCED \ ) / wet storage:
15" TEMPORARY CMP INV OUT=587.62 FROM STR-2;/
o
6 FOOT HIGH BAFFLES n I I I \ /
wet storage required c 67*DA*1.2 221 design high water 638.79 / / /
1 CONCRETE FOUNDATION. NOTE, IF STEEL BASE / 9 q (Y) ( ) 9 9 INV IN=587.1i TO TEMPORARY STR-A; SLOPE=i.33%
IS USED SPECIAL ATTENUATION SHALL BE GIVEN \ / / dewatering orifice elevation (ft) 635.18 top of dam (ft) 639.79 i5" TEMPORARY CMP INV OUT=587.oi FROM STR-A;
NO COMPACTION SO THAT 95%COMPACTION IS / / wet storage provided at this elevation (cy) 221 top width of dam (ft) 6.0 0 o INV IN=586.24 TO PERMANENT STR-1; SLOPE=i.33%
available volume before cleanout (cy) (34*DA) 94 bottom of basin (ft) 632.0 Lo o (o'
DID
r Fv /
cleanout elevation (ft) 633.53 approx. bottom dimensions: 45x30' / / SAF h TPh° H
j distance from cleanout to orifice (ft) (> 1') 1.66 upstream face slope: 2:1 /
I
h
downstream face slope: 2:1
6A O IST li = 7 L AC
dry storage:
I dry storage required (cy) (67*DA*1.2) 221 baffles: YES
B '' I I I I I I I I I
principle spillway crest (ft) 637.79 length of flow, L (ft) 90 /
dry storage provided at this elevation (cy) 221 effective width, We (ft) 43
I I \ I I I I diameter of dewatering orifice (in) 4.0 L / We (baffles required if < 2) 2.1 -
I diameter of flexible tubing (in) (orifice+2") 6.0
Icollars: YES
I 1 I runoff. depth of water at spillway crest (ft) 5.79 /
LNI1C (use 0.45 for bare earth) 0.45 slope of upstream face (Z 1) 2
lO
J _ ''
o = tc (min) 10 slope of barrel (Sb) 4.17°/D
12yr 4.1 Q 2yr 5.1 length of barrel in saturated zone (Ls) 41.7
I
C
125yr 6.0 Q 25yr 8.2 number collars required 2
0 \ \ D dimension of permanent collars 4.1'x4.1'
principle spillway:
N \ \ PROPOSED TEMPORARY 15" CMP 90-31 I Sl , IF \
available head (ft) 1.00 emergency spillway: YES I 9IF
666 \ \ 9 79 \
BARREL. THE CONNECTION BETWEEN
p I
AC diameter riser In 24 required capacity Q25-Q cfs 0.0 ' ' \ 16TRIRJFI®jF RREL SHALL BE211 SF \ , (•) q P Y ( P) ( )
I WATERTIGHT. LENGTH=64', spillway capacity, Qp (cis) 13.0 bottom width (ft) 12
0 \ diametertrash rack (n) 36 slope of exist channel (ft/ft) 16%
tT1 I
INVERT IN=632.00,INVERT OUT=629.33,
6 I `SLOPE =4.T7% barrel length (ft) 64 minimun length of exit channel (ft) 33
6 .7 I .' head on barrel through embankment (ft) 9.46 crest of spillway (ft) 638.79
NOTE: POST SPACING SHALL 9diameter of barrel (in) 15
1p - SF `/v/WIRE MAXIMUM OF 8 FEET. HEIG Table 16: Sediment Trap design (Spec 3.13) TO
SUPPORT SHALL BEAT LEAST 24 IN0 OCR +
V OF DAM
BUT NO GREATER THAN Sediment Trap design #3 \
VARIABLEINCHE
drainage area (acres) (< 2 ac) 1.00 I I \ \ / ' •
trapwlumes:
anwwL CREST OF STONE WEIR .meeE '
CONCRETE WASH
658 ', t,o I - PROPOSED SAFETY FENCE elevation (ft) area (sf) volume(cf) volume(cy) GNU _ OUT AREA , \
P - AROUND SEDIMENT BASIN 1 586 941 0 0.0 -
588 1692 \ 2,597 96.2 \ DRY STORAGE - N vAxwet£'
590 2645 6,898 255.5 \ F
656 IN \ 4o FOOT LONG ANDI 0 0 0 0.0I \ HH H HHH ( \
I I
6 FOOT HIGH BAFIFLEIS 0 0 0 0.0 wersroRAGE
IXGVAIED)
FCTER CLOTH
Cg NO
t
ELEV.
I
II 6 I I I I \ \M10ET \ wet storage:
1 I -SEE PLATE ].13 1 COIRSE AGGREGATE CUSS I RIPRAP
I
wet storage required (cy) (67*DA*1.2) 80.4
t - - RWD I 1 I I bottom of stone weir (ft) 587.67 SEDIMENT TRAP #3 DETAIL
L°o
I GRAVEL CONSTRUCTION wet storage provided at this elevation c 80.4 u IPROPOSEDTEMPORARY15" CMP OUTFALL TO SBi 9 p (Y) SCALE: 1 =20SITEACCESSROAD GRAPHIC SCALE
ENGTH=353; INV IN=640.73; INV OUT= 637.79 I slope of wet storage sides 2:1
SLOP / weir length (ft) (6xDA) 6.0 zo 0 0 20 ao
dry storage: bottom of trap elevation (ft) 586
dry storage required (cy) (67*DA*1.2) 80.4 bottom trap dimensions: 28x49'
SEDIMENT BASIN #`DETAIL crest of stone weir 588.8 top of dam elevation (ft) 590 (
IN FEET )
dry storage provided at this elevation (cy) 80.4 top width of dam (ft) 6' SCALE: i =2o slope of dry storage sides 2:1 top trap dimensions 47'X92'
inch = 20 it.
Sediment Trap design #1
drainage area (acres) (< 2 ac) 1.96
VARO
trapwlumes: CREST OF STONE WEIR ymA•
elevation (ft) area (sf) wlume(cf) volume(cy) GRWND
632.00 1328.0 0 0.0
ELEV. 1a
634.00 1944.0 3,252 120.5 DRY STORAGE - p VARVBE
636.00 2661.0 7,839 290.3
638.00 3478.0 13,960 517.0
0 0 0 0.0
WETSTORAGE
ENCAVATED)
MAX.
FILTER CLOTH ORIGNAL
C nn. EILEV.
wet storage:
SEE PIAIE 113-1 CQA§ISE AGGREGATE CUSS I R~
wet storage required (cy) (67*DA*1.2) 157.6
bottom of stone weir (ft) 634.44
wet storage provided at this elevation (cy) 157.6
slope of wet storage sides 2:1
weir length (ft) (6xDA) 11.8
dry storage: bottom of trap elevation (ft) 632
dry storage required (cy) (67*DA*1.2) 157.6 bottom trap dimensions: 30'X45'
crest of stone weir 636.2 top of dam elevation (ft) 638
dry storage provided at this elevation (cy) 157.6 top width of dam (ft) 10,
slope of dry storage sides 2:1 top trap dimensions 54'X69'
Table 16: Sediment Trap design (spec 3.13)
Sediment Trap design #2
drainage area (acres) (< 2 ac) 0.71
trap volumes: oRwwi
CREST OF STONE WEIR pg pq
elevation (ft) area (sf) volume(cf) volume(cy) CRWND
586 595 0 0.0
ELEV. \`
1
588 1200 1,760 65.2 DRY STORAGE - t VARMAE
590 2006 4,932 182.7
0 0 0 0.0
0 0 0 0.0 WET STORAGE
Y MNL
E%GVATEO)
GLOTX dIIGIMAITER
GRWNO
wet storage:
SIDE PLATE Y13-1 C0 AGGREGATECUSS I RIPRAP wet
storage required (cy) (67*DA*1.2) 57.1 bottom
of stone weir (ft) 587.75 wet
storage provided at this elevation (cy) 57.1 slope
of wet storage sides 2:1 weir
length (ft) (6xDA) 4.3 dry
storage: bottom of trap elevation (ft) 586 dry
storage required (cy) (67*DA*1.2) 57.1 bottom trap dimensions: 23X43' crest
of stone weir 588.8 top of dam elevation (ft) 590 dry
storage provided at this elevation (cy) 57.1 top width of dam (ft) 6' slope
of dry storage sides 2:1 top trap dimensions 41'X86' Lie.
No. 035791,E 08/
27/20 w' Z
Z oJ a
4
C. v w7
m
OF,
J
Z
Q in
z a
0
NN
00
L9
O
ZM
O N
a r
V O
WNJ
Q
Cn
U NW
0 z
z aQ
Z_
J J J
J W
1
jLU QO
J O
Q
z
YWYo! O LU
V
C
P LU
to
O W LU
LLI
LU
V)
U)
0 J1--
z wQz
O
O
O LU
0
a
W
LU
u=)
JOB
NO. D
112066
SCALE
1" =
20' SHEET
70. 10
PRE -DEVELOPMENT SWM PLAN: / POST -DEVELOPMENT SWM PLAN: PROPOSED STORMWATER MANAGEMENT NARRATIVE FOR THE PROJECT:
SCALE 1"=60' / / / - - - - - - --- - SCALE 1"=60' _ OVERVIEW: 010THEPROPOSEDSTORMWATERMANAGEMENTPLANCOMPLIESWITHPARTIIBreREQUIREMENTSTOMITIGATEIMPACTSFROMTHEPROPOSEDIMPROVEMENTS.SUMMARIES
OF THIS COMPLIANCE CAN BE VIEWED IN THIS VSMP SET AND IN THE ACCOMPANYING
STORMWATER MANAGEMENT CALCULATIONS PACKET. SCOTT/R. C+741,,LLINS20
68o ,682/ 684
7_ - - - _ \ / / - - _
68o ,682/ STORMWATER QUANTITY: O Lie. NO. 035791
68° - Id O'Cl'E 220 14- / r 6$° - 8`01 E Z2 L4- / r CURRENTLY ALL OF THE EXISTING IMPERVIOUS AND PERVIOUS AREAS WITHIN THE PROJECT
68 6$6
LIMITS EXIT THE PROPERTY UNTREATED. THE PROPOSED PLAN WILL CHANGE THIS AND ', OS/27/2O
6
4 6$ - WILL CAPTURE THE MAJORITY OF THE PROPOSED IMPROVEMENTS. THE CAPTURE AND
i q0 / / 6° _ DETENTION OF THE MAJORITY OF THESE IMPROVEMENTS IS REPRESENTED BY _`5 YI SONALPOST-DEVELOPM ENT SUBAREA A, WHERE AN UNDERGROUND DETENTION SYSTEMGoo *59 o6$4684ATTENUATESTHERUNOFF. THE REST OF THE DEVELOPMENT CONTAINING THE EXISTING
RESIDENTIAL LOTS AND EMERGENCY ACCESS ROAD THROUGH THESE LOTS IS
J /
REPRESENTED BY POST -DEVELOPMENT SUBAREAS B & C, WHERE A DETENTION BASIN
Tc 0. rs.
58' OF OLF d ELEV.-3- / / 6 - \
ATTENUATES THE RUNOFF. CHANNEL PROTECTION IS MET VIA 9VAC25-870-66 SECTION
J
6 • /
SUBAREA C _
100' OF COryC. FLOW w/ ELEV.=5' / \ I / J \( / B.3.a. FLOOD PROTECTION IS MET VIA 9VAC25-870-66 SECTION C.2.b.
PLEASE SEETHEATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR0.62 ac. /
58 \ / /
ADDITIONAL DETAILS PERTAINING TO THE STORMWATER QUANTITY COMPLIANCE.
Tc=0.19 hrs. V / / / ta 00 ° o) / / STORMWATER QUALITY:
ko ' /
THE STORMWATER QUALITY REQUIREMENTS FOR THIS DEVELOPMENT ARE MET
SUBAREA B \/ / - \ I I 1 /C THROUGH THE BEST MANAGEMENT PRACTICE OF PURCHASING NUTRIENT CREDITS. A
0.2§ aC. 7 \ HE BOUNDARY FOR TH__ - HE B UNDAHY FOR, TF E-
MINIMUM PHOSPHOROUS REMOVAL RATE OF
O T E ISSUANCE
IS REQUIRED. THE DEVELOPER
WILL PURCHASE NUTRIENT CREDITS PRIOR TO THE ISSUANCE OF A LAND
CN=58 \ .0 PRO SED LIMITS'OF I ° PRO SED LIMITSOF DISTURBANCE PERMIT.
l \ I I Tc= .27 hrs. / 6°1° U \ : \ . I R ANCE (4.25 at.) IS I \ I / 69 X9 r0 i R ANCE (4.25 ac.) IS
USE TO DEFINE THE PLEASE SEE THE ATTACHED CALCULATIONS PACKET AND THIS SHEET FOR ADDITIONAL
5 wo
USE TO
FOR THETH DETAILS.
o RYFORTHEVR " "
rs. fo WATER QUALI V A jFxo 6 wo 0 WATER QUALI
0' OF OL w E EV. 3'
f- \ ° o°
CALCULATIONS P. \ l \ " `p ° CALCULATIONS P. z
A \ 49' OF ONC. FLOC w d ELEV.=2
041 (0 \ A a1 O
V A o \ - - - 9°-688_ - - \ "
0 69 - 9O_ - - 686-- -
mo -
688- - cc
b
68 --- - - - - 0 68 88-'`' - - - - 686-- -- - v md -68 _ - - O LnI \ \ \ c= .1 hrs. 9
V /
16, OF OL w d LE =5' a - u30' OF OLF w/
c=0.1EL0 hrs. \ ~ ^
O Z34' OF CON FLOW w d ELEV.=14' \ \ \77' OF COilC. FLOW',,w/ d EV. 3' - -- /
68 : \ \ \ \ \ \
400'F CHANNEL FLpW ®6 5
8 > a i
A \ \ 8 Lu
IF IN MON -\ S \ LW/ ON dNC\ - _ -----
V A
6 `
v $CJBAR y ge.b. \ \ \ \
6 0 A
68 _ - - _ L \
0.10
CN=61 \ \ \ \ o 0 0
Tc=0.16hrs.l8z - _ i --- \ \ \ \ 8z eo
b A{ A A No
SUBAREA -A-- - - ^2.27 ac.
m"
3 lac.
1
o wo CN=87 0
CN=74 - \ \ \ \ \ \ \ d
7 v
i =0.10 hrs.
N"-
Tc=0.25 hrs. - \ \ \ \ io
iff 6 J\ \ \ \ \ \ \ \ \ UND GROU'N ° - \
4 - - - 06-- \ \ \ \ \ \ \ DETENTION
r
wo 0 6 i
J
d - - - - 67z1 / \ \\ \ \ \ \ \
SWM a 67 - 67 6jz /
670
6 8 CD68rt
656
654 60' OF OLF w/ d ELEV.=3' _ 6 \ \ \ \ \ \\ \ \ \ 6 4 _ o _ s \ / /
cl
7s6' ofcoNZFLov_/v.=1oa' \ a / / \ \ \ \ 668 \ 9
6 2 - - - °° \ -
CIJ
BREAB
652 17
58
66
a -
1 0 / / - \ /
6 - - rn- / - - \ \ / / \ \ \ \ ChL=80 6 Nz A E C
o - - - 9 6\ \\ \ \ \ \\\ \=0_10- - ., 1.18 ac.
2 6Sk \ \ \ \ \ -- 2 - CN=75
6 \ - 650 \_ - \\ \\ \ \ \ -6 _ - "
fi
T = 0 hrs 6 0 \__-
6
o 646 HE B Y _
J \ \\ \ \ ( 6 -
5
6 8 B
J
6 - - 46- - \ may\ rc=o.i6hrs. 6 6 co
l PROP-OSED-LIMIT OF \ \ \ - 46-
b44 - \ \ \ \ 44' OF 0LF d€LEY.=S' ' -b44
PROPASEfJLIM1_
6 / 042 - TURgAhIZE (4. aC, \ \ \ 123" CHANNEL-FLQ ® 0.56 ft/s 6 _- _ \ CIO
040 - \ CHANNEL FLOW 0 10 ft s 6 _--- °5° 6 $. 6
040 ISTURSP,IVC€(4. dC.
6 z SED F DEF \ \ \ \ \ \ T - z 4 °4 SED-TO-DEF N6oI - F
6 -
BOU RY ORTHEV I \ \ \ 6 ° I 644 3A PF _ BOUNQAR FOR'll V M\ 63 - WA - - -
g - WATER QUALITY \ Mg / - R QUALITY - 63
l403' W 3 }9197 U I \ \ \ - 6 8a 6 31 b3"W 319 CALCU I S, TY3 _ _
I
Ji
3 \ / / 6 z - - - \ \ \ \ \ - - 3
3 632 _
J _CN
z - - --- - - - - i / i _
z6 \ - \ - 6 z 3gz6 I CA
624- \ - - \ \ \ \ -
6 0 6z4_ \ _ _ \ N z6 ° N MOj - 622 \ / \ \ \ \ ` N
Q
A-6 0 6 8- 6?0 \\ Q
v a' T / TMP 90-31- 6 - \ \
v \ 4 - /
TMP 90-31 6
0-
V 24 5.262 AC - ,6 8v - - - \ \ V v v A - 24 5.262 AC 3C 6
8 - -
LLJ
229, 211 SF \
6 - J I \ \ \ \ m
a
z -- - 1 rc-o.1 nr
J J Z267 \ \ \ w n 2
9, 211 SF 6. So, 9LEw/ d ELEV.=7.5 J •
V A \ n
ai
61 \ V
A n m 20
23
22
y
61 LL
N cn ^ 'tt,, \ 55 F CONC. FLAW w/d ELEV.-88' w
20 %
1 62 VA
r"
6 0 \ z
28' °
8 \ v A V v z 23 .3 °8 \ v
v
V A \ 614- /ter V A v A \ A 614 c S °
A V A Q Q
V A / 7 60 V A / 60 \ \ \ J 1k \
A A 612 I l v V A
I --I QQI --I
I6io- \ \ -` I \ 602 \ \ / \ 6io- \ 6oz \
I DETENTION \
8 \ °o \ _ \ \ \\ 1600 BASIN
6O / / \ i6o8 / / \ SWM \
A -604 / \ s98
V\ // - \ -604 / /
S8
A\/A W
TJ
I /\I - ,\
i-\\-----
6oN
S_
604
S9Ul
C/) 7 6027z/\ \ -
600LOCIONOF -
592 -
600592 PROPOSED m Pre -Development
Impervious Area Summary O 598 - \ / \ EN oN S9p \ \ \ \ -
598 / S90 p p Y \\ 0
596_ PON \ - - - - _ 598-
1 \ LOD for LL1 / L \ - - \ \ \ 8 / / \ Building 488
sf LU Q 59b Roads/Driveways 19,
995 sf G I -yv / EN \ \ \ '
i -
iyv
8 EN \ 20,483 U)
Quit 590 2 \ \ / / \ - - 590
24 \ \
Post -Development Impervious Area Summary OD for Water Quality
LLB 588_ 'C / i - \ \ - \ 588_
5 /• _ - \ \ - / FBuilding 25,801
sf UJ--- q, / / \-\ \rking Areas/Roads
46,636 sfewalks &Concrete 7,037 sfQ79,474 General Construction
notes for
Stormwater Management Plans Post -Development
Impervious Area Summary 1. All dams and
constructed fill to be within 95% of Subarea A, Water Quantity WATERSHED SUMMARY 0 maximum dry density
and
2% of optimum moisture CHANNEL P. FLOOD PROTECTION SUMMARY content. All fill materialtobeapprovedbyaBuilding24,873 sf geotechnical engineer. A geotechnical
engineer is to Parking Areas/Roads 34,179 sf be present during constructionofdams. 2. Pipe and riser
joints are to be watertight within Sidewalks &Concrete 6,979 sf stormwater Management facilities. 66,
0315f 3. For
temporary sedimenttrapsorbasinswhicharetobeconvertedto
permanent stormwater management facilities; conversion is
not to take Subarea B, Water Quantity CN Area, ac. 1-
year
Flow,
cfs
2-year Flow,
cfs
10-year Flow,
cfs
FDA A, B,
C, &
D (Pre-Dev) 70 4.19 3.63 5.70 12.84 CN Area, 1-year
Flow, 2-year Flow, 10-year Flow, Post 83 4.19
1.30 4.38 12.78 Method of 9VAC25-870-
66 Pre-Dev. Post-Dev.
Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 LimitsofAnalysis Subarea Subarea Channel
Protection Compliance
Flood Protection Compliance Limits of Analysis for Flood Protection Protection A B C & D
I
A B & C ISection B.3.a (Energy Balance) I N/A (Energy Balance Satisified) ISection C.2.b (10-yr. Post Flow < Pre Flow) N/A (10-yr. Post Flow < Pre Flow Satisified) place until the site isstabilized, and permission has been obtained from the erosion
control inspector. Building/Structure 1,597 sf Roads/Driveways 7,374 sf
GRAPHIC SCALE NOTE: Sub-Area'A' is
routed through Underground Detention System 'SWM 1' and Sub -Areas B &Care Pre -Development Impervious Area Summary
8,971 sf routed through Detention Basin'SWM
2'. The overall Post -Development is the summation of these routed e0 0 30 60 120
2a0 Subarea A Subarea C, Water
Quantity outflow hydrographs Building/Structure 3,
924 s
Structure Building/Structure g/ 348 sfRoads/Driveways18,845 sf
Roads/Driveways 2,869 sf IN FEET ) 22,769 sf 3,217
sf 1 inch = 60 IT, F- Lu w w cc
x
a In
JOB
NO. 112066
SCALE 111=
6o' SHEET
NO.
11
n
STR:4 VDOT MH-i
675 TP=670.30 675
SWMINVIN:
INV IN: 66INVIN: 660.32 TO yA4A PROPOSED ACCESS MH W/ STAII
INV OUT: 652.46 TO 3 FOR INSPECTION & MAINTENAN
670 670
am
to 3. COVER RESTRICTIVE WEIR PI
r OWSEPOINT TO DRAII E
DETAIL ON THIS 665
O
00 D N
lD F7 06o-
YR PEA WSE=
667." 665 iO >
O 2-
YR PEAK PROPOSED
GRADE (TYP.) F
d>>' Z Z PEAK
WSE
WSE=66y.n PROPOSED
LOWER 1r UNDERGROUND
DETE SYSTEM
PRIMARY OU 66c
66o m
mWEIR PLATE O
O
n INVERT=559.00 65
r^
o
m N, S"
11.
84 HDPE
LF
Cal 4.560/0 655 0 0 -OUTFALLiNVERT=658.4 PROPOSED 96" CMP U o
z SYSTEM @0.50%TO) I.-
1 > >
FROM THIS DEVELOPP V)
1-- z z / TOTAL CMP LENGTH= 65c
65o Qo
l0 eh
roh'
64
645 64
Mo o
640
0
m
63
a ° 635 FLn
z z 6"
630
EXISTING GRADE TYP.)---,, 630 m
m
F-
pQ OoQ to
62
i ° 0) y F 6 5 F -
ko N H
tD 0v
oy
0m8
t- V62
m-
0 F
a>> Ln620
615
6 5 N
U O amm
H p 0. 00
51h F O 00
0) 6 1 61
Ln
610 Om-0
d CAF
Z
Z 60 6o5
0 mo-
roN
O m
H
N
FO O rn Di , naF r'
60 zN0. i 600po00iII»
4m^~ Ln tihv
z O 93-
6 I) tea>>
LA
ZZ_ 595 595 59
SLF 3.
35% 590 81. 585 5'
HDPE
1% 91.28
LF@5851S" RCP 23.
79 LF
Cal 1.00% 58 580 H
C! 0
rn 4 o i°. o to m 4 It N N m rl kD00 tD ~ Ol '
Hcy) r^ It kDN ei N N `D r,l O r;,Ln 'r W
m W
O D U) U) Ln
kD w 0 0 D 0+50 0+
00 0+50 1+00 1+50 2+00 2+So 3+00 3+50 4+00 4+50 5+00 SWM 1 TO
OUTFACE PROFILE tS ZE ATE
AT
4THE
SYSTEM iHEET
NTION TFALL PROPOSED
ACCESS
MH
w/
STAIRS FOR INSPECTION & MAINTENANCE, TYP. ACCESS
MH TO BE
LOCATED UPSTREAM & DOWNSTREAM FROM RESTRICTIVE WEIR
PLATE AND AT THE
MIDPOINTS & HIGH POINTS OF THE SYSTEM,
AS SHOWN. RESTRICTIVE STEEL WEIR PLATE,
AT LOW POINT, TO DRAIN
THE SYSTEM. SEE DETAIL ON THIS
SHEET. 096" INV. 559.48' _ \
VO oL7F J Ln °
CD CCD096"
INV.
55T.42'
8TF @ 0.5%
CONTRACTOR SHALL
CALL THE
COUNTY INSPECTOR VDERGROUNDDETENTION & ENGINEERING DEPARTMENT 24-
HOURS BEFORE TTENUATE RUNOFF CAUSED 1ENT. ANY ANTICIPATED CONSTRUCTION
ACTIVITIES FOR s°°° THE BMPS. THISIS
INCLUSIVE OF WHEN THE UNDERGROUND DETENTION SYSTEM SUBGRADE
IS READY FOR PIPE CONSTRUCTION,
BUT BEFORE STONE BEDDING IS INSTALLED.
658 5+50 6+
oo
6+5o 7+00 PROFILE SCALES i"=5' (
VERTICAL) i"=
5o' (HORIZONTAL) 656
654 UNDERGROUND DETENTION
DETAIL:
SCALE
1 FACILITY INSPECTIONS DURING
CONSTRUCTION:
CONSTRUCTION INSPECTIONS ARE CRITICAL
TO ENSURE THE UNDERGROUND DETENTION SYSTEM IS PROPERLY BUILT. BECAUSE THE TIMING OF THE INSTALLATION
IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER, COUNTY INSPECTOR AND
CONTECH REPRESENTATIVE PRIOR TO INSTALLATION. CONTECH, OR AN EQUIVALENT PIPE MANUFACTURER, SHALL BE CONTACTED
WELL AHEAD OF THE CONSTRUCTION START DATE TO ENSURE ADEQUATE LEAD TIME FOR MATERIALS AND DELIVERY. MULTIPLE
SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENGINEER, COUNTY INSPECTOR &
PIPE MANUFACTURER, DURING THE FOLLOWING STAGES OFTHE UNDERGROUND DETENTION SYSTEM CONSTRUCTION PROCESS: 2.
PRE -CONSTRUCTION MEETING
2. INITIAL SITE PREPARATION (
INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATIONIGRADING(E.G.,
INTERIM/FINAL ELEVATIONS). 4. WHEN THE DETENTION
PIPE SUBGRADE IS READY FOR PIPE CONSTRUCTION, BUT BEFORE STONE BEDDING IS INSTALLED. S. AFTER STONE BEDDING
IS PLACED AND COMPACTED, BUT PRIOR TO PIPE INSTALLATION. 6. ATTHETIME OF THE
PIPE INSTALLATION. 7. AFTER PIPE INSTALLATION,
BUT PRIOR TO PLACING FILL OVER THE SYSTEM. 8. FINAL INSPECTION (DEVELOP
A PUNCH LIST FOR FACILITY ACCEPTANCE) PLEASE ALSO SEE BELOW,
UNDER FACILITY MAINTENANCE, FOR REQUIRED INSPECTIONS AFTER INSTALLATION IS COMPLETE. FACILITY INSPECTIONS & MAINTENANCE AFTER
CONSTRUCTION: THE FOLLOWING MAINTENANCE TASKS
SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING THE INSTALLATION OFTHE UNDERGROUND DETENTION
SYSTEM. i. FORTHE FIRSTYEAR FOLLOWING
CONSTRUCTION, THE SITESHALL BE INSPECTED BY THE CONTRACTOR QUARTERLY AND AFTER STORM EVENTS THAT EXCEED
2/2 INCH OF RAINFALL. 2. THE CONTRACTOR SHALL
LOOK FOR BARE OR ERODINGAREAS INTHE CONTRIBUTING DRAINAGE AREA AND AROUND THE UNDERGROUND DETENTION SYSTEM AND
MAKE SURE THEY ARE IMMEDIATELY STABILIZED. CONTRACTOR SHALL SPOT RESEED AS NECESSARY AND ENSURE ADEQUATE
SITE COVERAGE IS PROVIDED WITHIN THE FIRST YEAR. AT THE QUARTERLY INSPECTIONS, AND AFTER EACH RAINFALL
EVENT IN EXCESS OF i,", THE CONTRACTOR SHALL PERFORM THE ANNUAL MAINTENANCE TASKS DESCRIBED BELOW IN#3.
AFTER THE FIRST YEAR
THE OWNER SHALL PERFORM FOLLOW-UP INSPECTIONS ANNUALLY, AND AFTER EACH SIGNIFICANT RAINFALL EVENT: 3. ASPIRING MAINTENANCE
INSPECTION
ANDCLEANUP SHALL BE CONDUCTED ANNUALLY. THE MAINTENANCE PROGRAM FORTHE UNDERGROUND DETENTION SYSTEM SHALL
INCLUDE CLEANING IT ANNUALLY OF TRASH, DEBRIS & SEDIMENT AND ENSURING THE INTEGRITY OF THE WEIR
PLATE, TRASH RACK AND OUTFALL & INFLOW PIPES. THE OWNER SHALL ENSURE THE SYSTEM IS OPERATING AS INTENDED AND
IS NOT CLOGGED OR DAMAGED. THE OWNER SHALL IMMEDIATELY CLEAN & REPAIR THE FACILITY AS NECESSARY AND SHALL
PAY SPECIAL ATTENTION TO THE INLET AND OUTLET LOCATIONS. THE ACCESS MANHOLES SHALL BE USED FOR INSPECTION AND
MAINTENANCE. UNDERGROUND DETENTION SYSTEM GENERAL
NOTES: 1. TRASHRACKS SHALL BE
INSTALLED ON ALL ORIFICES, INCLUDING THOSE LOCATED ALONG THE WEIR PLATE WITHIN THE UNDERGROUND DETENTION SYSTEM,
IN ACCORDANCE w/ THE DETAIL SHOWN ON ON THIS SHEET (OR EQUIVALENT). 2. DETENTION SYSTEM'
s
WEIR PLATE TO BE PRE -MANUFACTURED AND DELIVERED TO THE SITE. WEIR PLATE SHALL BE SECURELY AFFIXED TO
THE INSIDE WALLS OF THE MANHOLE STRUCTURE. 3. PRIVATE DESOTO COURT
LOCATED WITHIN THE SWM EASEMENT, SHALL SERVE AS ACCESS TO THE PROPOSED UNDERGROUND DETENTION SYSTEM. 4.
CONTACTCOLLINS ENGINEERING(434.
293.3719) REGARDING ANY QUESTIONS CONCERNING THE UNDERGROUND DETENTION SYSTEM. 5. ALL
FILL EMBANKMENT
MATERIAL SHALL CONSIST PREDOMINANTLY OF SOIL AND BE PLACED IN SUCCESSIVE UNIFORM LAYERS NOT MORE
THAN 8 INCHES IN THICKNESS BEFORE COMPACTION OVER THE ENTIRE AREA IN ACCORDANCE WITH CURRENT VDOT
ROAD AND BRIDGE SPECIFICATIONS, OR THE FILL EMBANKMENT MATERIAL SHALL MEETTHE PIPE MANUFACTURER'
s SPECIFICATIONS OUTLINED BELOW (WHICHEVER IS MORE STRINGENT). 6. ALLFILLSHALL BE PLACED
AT95% COMPACTION ANDTESTED BYAGEOTECHNICAL ENGINEERTO ENSURE COMPACTION IS REACHED AND
MAINTAINED, OR THE FILLSHALL MEETTHE PIPE MANUFACTURER's SPECIFICATIONS OUTLINED BELOW (WHICHEVER
IS MORE STRINGENT). 7. VDOT STD. IS-
1 & ST-1 ARE REQUIRED ON ALL PROPOSED PUBLIC STRUCTURES AND THE UNDERGROUND DETENTION SYSTEM's JUNCTIONS.
8. PRIOR TO CONSTRUCTION
THE CONTRACTOR SHALL TEST -DIG AT THE EXISTING INLET & OUTFALL TO CONFIRM THE INVERTS AND TO
ENSURE THE PROPOSED GRADES CAN BE ACHIEVED. CONTRACTOR SHALL CONTACT COLLINS ENGINEERING OF ANY DISCREPANCIES
IN THE HORIZONTAL OR VERTICAL ALIGNMENT PRIOR TO ORDERING AND CONSTRUCTION. 9. ALL EXCAVATION
FOR
UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR CONSTRUCTION INDUSTRY (29 CFR
PART 1926). 10.PENDING PRIOR APPROVAL
BY COLLINS ENGINEERING, THE DRAINAGE PIPE MATERIALS MAY BE SUBSTITUTED. ALL DRAINAGE PIPE INSTALLATION PRACTICES
SHALL BE IN ACCORDANCE WITH CURRENT VDOT STANDARDS AND REQUIREMENTS. CONTRACTOR SHALL ENSURE
MINIMUM COVER REQUIREMENTS ARE MET WITH ANY PIPE SUBSTITUTION. 11.0 LF
@
5% ACCESS TO
SWM FACILITY
659.00' ss PROPOSED ELEVATED 015" PIPE
ALLOWS MORE SIGNIFICANT & LESS FREQUENT
STORM EVENTS TO SAFELY
BYPASS THE UNDERGROUND DETENTION SYSTEM PROPOSED
LOWER 015" UNDERGROUND
DETENTION SYSTEM PRIMARY
OUTFALL 0
11+00 - P196"
WEIR
PLATE DETAIL
NOTE: SCALE:1"=5'
WEIR
PLATE TO BEBOLTED & SEALED TO DETENTION SYSTEM
WITH WATERTIGHT CONNECTIONS. _ 3.
87' _ OVERFLOW WEIR IS HYDRAULICALLY
If'I1 EQUIVALENT TO AN ORIFICE
WITH AN APPROX. DIAMETER OF OiS.
So" MANUFACTURE / INSTALL ONE (1)
06" X 08" MID -FLOW ORIFICE IN THE STEEL
PLATE (INVERT ELEVATION 664.30') INSTALL TRASH RACKS ON
ALL ORIFICES, TYP. SEETHIS SHEET
FOR DETAIL, OR EQUIVALENT.
MANUFACTURE / INSTALL ONE (I)
03" LOW -FLOW ORIFICE IN THE STEEL
PLATE AT THE LOW POINT OFTHE DETENTION SYSTEM (INVERT ELEVATION
659.00') STR:4 VDOT MH-
1 TP=67o.30 INV
IN: 658.46
TO SWM 1 (2) INV IN: 66o.32
TO 4A INV OUT: 652.46
TO 3 15" HDPE o LF (
al 20.
00% 61; 0 0+50
Ln
O
O O
a N
N 0 O
N Ln
a kD M
a»
TYP.) r
EXISTING GRADE (
TYP.)
ELEV.=667.00' B
PROPOSED ELEVATED iS"
PIPE
65 ALLOWS MORE SIGNIFICANT&
LESS FREQUENT STORM EVENTS TO
SAFELY BYPASS THE UNDERGROUND
15" HDPE DETENTION SYSTEM
i7.55 LF Cal
20.00% 55 PROPOSED 96" CMP
UNDERGROUND
DETENTION SYSTEM Cal o.5o%
TO ATTENUATE RUNOFF CAUSED FROM THIS DEVELOPMENT. TOTAL
CMP LENGTH=180.
00' 50 Q+00 Q+
50
EMERGENCY BYPASS PROFILE SCOTT/
R. CULLINS'Z
Lie. No. 035791 p
08/27/20
4rj Z0 o O °C
mU
ca W 1n0 _1aOr-
Ln
z
W L ~
ce ryM
W N
N
N
in
Lu
0
0
O
O
N
F- w
W
O
w
CL a
rn JOB
NO. 112066 SCALE
AS SHOWN
SHEET
NO.
12
HUGGER
SINGLE BAR, BAND FLAT GASKET
BOLT AND STRAP(SBBS)
FLAT GASKET
CONNECTION DETAIL
SBBS)
2 2/3"x1/2" RE -ROLLED END HEL-COR PIPE
GENERAL NOTES:
1. JOINT IS TO BE ASSEMBLED PER AASHTO BRIDGE CONSTRUCTION SPECIFICATION SEC 26A.2.4.
2. BAND MATERIALS AND/OR COATING CAN VARY BY LOCATION. CONTACTYOUR CONTECH REPRESENTATIVE FOR AVAILABILITY.
3. BANDSARE SHAPEDTO MATCHTHE PIPE -ARCH WHEN APPLICABLE.
4. BANDS ARE NORMALLY FURNISHED AS FOLLOWS:
12" THRU 48' 1-PIECE
54" THRU 96' 2-PIECES
102"THRU 144'3-PIECES
5. BAND FASTENERS ARE ATTACHED WITH SPOT WELDS, RIVETS OR HAND WELDS.
6. ALL CMP IS REROLLED TO HAVE ANNULAR END CORRUGATIONS OF 2213'1/2'
7. DIMENSIONS ARE SUBJECT TO MANUFACTURING TOLERANCES.
8. ORDER SHALL DESIGNATE GASKET OPTION, IF REQUIRED (SEE DETAILS ABOVE).
H-12 HUGGER BAND DETAIL
NOT TO SCALE
20 MIL PE
IMPERMEABLE
LINER OVER
TOP OF PIPE LIMITS OF
IF REQUIRED) REQUIRED
BACKFILL
96" TYP 36'TYP 30" SEE TYPICAL
BACKFILL DETAIL
NOTES
TYPICAL SECTION VIEW
NOT TO SCALE
NOTE: IF SALTINGAGENTS FOR SNOW AND ICE REMOVAL ARE USED ON OR NEAR THE
PROJECT, A GEOMEMBRAN E BARRIER IS RECOMMENDED WITH THE SYSTEM. THE
GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM THE
POTENTIAL ADVERSE EFFECTS THAT MAY RESU LT FROM A CHANGE IN THE
SURROUNDING ENVIRONMENT OVER A PERIOD OF TIME. PLEASE REFER TO THE
CORRUGATED METAL PIPE DETENTION DESIGN GUIDE FOR ADDITIONAL INFORMATION.
UNDERGROUND DETENTION SYSTEM MINIMUM TRENCH & BACKFILL REQUIREMENTS
1. THE TRENCH CONTAINING THE DOUBLE RUN OF 96" CMP STORM PIPE SHALL HAVE A 288" WIDE TRENCH. THE
TRENCHES CONTAINING THE 15" BYPASS HDPE PIPE AND THE 15" OUTFALL PIPE SHALL HAVE 361, WIDE
TRENCHES. CONTRACTOR SHALL WRAP THE EXCAVATED TRENCHES WITH A 6 OUNCE FILTER FABRIC CLOTH. A
SUITABLE FOUNDATION SHALL BE BENEATH THE TRENCHES' FILTER FABRIC CLOTHS.
2. TRENCHES TO INCLUDE A 6"#S7 STONE BED AT 95% COMPACTION BENEATH THE HP STORM PIPES.
3. TRENCHES SHALL BE BACKFILLED WITH #57 STONE AT 95%COMPACTION AND SHALL EXTEND A MINIMUM OF 6"
VERTICALLY ABOVE THE CROWN OF THE STORM PIPES.
4. THE TOP OF THE #57 STONE SHALL BE COVERED WITH A 6 OUNCE FILTER FABRIC CLOTH, OVERLAPPING THE
PREVIOUSLY INSTALLED CLOTH THAT SURROUNDS THE BOTTOM AND SIDES OF THE TRENCHES.
S. SUITABLE FILL REACHING THE FINISHED GRADES SHALL BE APPLIED ABOVE THE TOP LAYER's FILTER CLOTH,
MEETING MINIMUM PIPE MANUFACTURER's REQUIREMENTS TO PREVENT FLOATATION AND ENSURE PIPE
INTEGRITY IS MAINTAINED.
6. A MINIMUM COVER OF 12" IS REQUIRED ABOVE THE CROWN OF THE STORM PIPES.
7. SEE THE'TYPICAL BACKFILL DETAIL' ON THIS SHEET FOR ADDITIONAL UNDERGROUND DETENTION SYSTEM PIPE
REQUIREMENTS.
INITIAL BACKFILL
w
o
do
Sa
7 q p
X
5 eo111
BEDDING 3// r,,, z'f- , r
FOUNDATION 2
IN SITU
I /2' zinc plated hook
attached with 3/6' fasfem i
2-1/0' diehole. CO ®®®
Isometric
1/
4' HDPE ptato (optional) 1.
Pr w
HDRF2-
1/ "tructnral pl1/4 n QhalesandIJ." p„ im.
a.f OOzn .thin. trod by ?I.1 OOO9olullonn
rat,
or cQu.l 0000
i•- • .
no.v rue "puore] prate HDPF
a-urturel pin.lir with 2-
1/0" holes and 1/9 plate m
CLIO ecufacturad by Plmsthe solution.
Inn. or c".1 6/
B' di. holy 0
0 1
o
O o OD
4 OOElevation
adikeDEBRIS
CAGE LASTIC
SOLUTIONS
P.
O. Ras a:1fl6 xmrn
mrr ct aws INC.
BTY-BTY-6Y2Y w.
plelie-wluie eom DIAMETER
MIN.
COVER
CORR.
PROFILE
Ti
12" 1 1/2" x 1/4" 12"
1 12" 2 213" x 1/2" 54"
1 12" 3" x 1 5" x 1" 102"
1 D/8 3" x 1 5" x 1" INITIAL
FILL ENVELOPED is BACKFILL
REQUIREMENTS FOLLOW THE GUIDELINES OF AASHTO LRFD BRIDGE DESIGN (SEC 12) AND CONSTRUCTION (SEC 26) 1
MIN IMU M TRENCH WIDTH MUST ALLOW ROOM FOR PROPER COMPACTION OF HAUNCH MATERIALS UNDER THE PIPE. THE
MINIMUM TRENCH WIDTH (12.6.6.1): PIPE <_
12": D+16" PIPE >
12": 1.5D+ 12" 1a
MINIMUM EMBANKMENT WIDTH (IN FEET) FOR INITIAL FILL ENVELOPE (12.6.6.2): PIPE <
24": 3.OD PIPE
24" - 144": D + 4'0" PIPE >
144": D + 10'0" 2
THE FOUNDATION UNDER THE PIPE AND SIDE BACKFILL SHALL BE ADEQUATE TO SUPPORT THE LOADS ACTING UPON IT(26.5.2). 3
BEDDING MATERIAL SHALL BE A RELATIVELY LOOSE MATERIAL THAT IS ROUGHLY SHAPED TO FIT THE BOTTOM OF THE PIPE, AND A MINIMUM
OF TWICE THE CORRUGATION DEPTH IN THICKNESS, WITH THE MAXIMUM PARTICLE SIZE OF ONE-HALF OF THE CORRUGATION DEPTH (
26.3.8.1, 26.5.3). 4
CORRUGATED STEEL PIPE CSP /HEL-COR). 5
HAUNCH ZONE MATERIAL SHALL BE HAND SHOVELED OR SHOVEL SLICED INTO PLACE TO ALLOW FOR PROPER COMPACTION (26.5.4). 5a
INITIAL BACKFILL FOR PIPE EMBEDMENT TO MEET AASHTO A-I,A-2 OR A-3 CLASSIFICATION, OR APPROVED EQUAL, COMPACTED TO 90% STANDARD
PROCTOR (T 99). MAXIMUM PARTICLE SIZE NOT TO EXCEED Y (12.4.1.2). ALL LIFTS PLACED IN A CONTROLLED MANNER. IT IS RECOMMENDED
THAT LIFTS NOT EXCEED AN 8" UNCOMPACTED LIFT HEIGHT TO PREVENT UNEVEN LOADING, AND THE LESSER OF 1/3 THE
DIAMETER OR 24" AS THE MAXIMUM DIFFERENTIAL SIDE -TO -SIDE (26.5.4). 6
INITIAL BACKFILL ABOVE PIPE MAY INCLUDE ROAD BASE MATERIAL (AND RIGID PAVEMENT IF APPLICABLE). SEE TABLE ABOVE. 6a
TOTAL HEIGHT OF COMPACTED COVER FOR CONVENTIONAL HIGHWAY LOADS IS MEASURED FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE
PAVEMENT OR TOP OF RIGID PAVEMENT (12.6.6.3). 7
FINAL BACKFILL MATERIAL SELECTION AND COMPACTION REQUIREMENTS SHALL FOLLOW THE PROJECT PLANS AND SPECIFICATIONS PER
THE ENGINEER OF RECORD (26.5.4.1). NOTES:
GEOTEXTILE
SHOULD BE CONSIDERED FOR USE TO PREVENT SOIL MIGRATION INTO VARYING SOIL TYPES (PROJECT ENGINEER). FOR
MULTIPLE BARREL INSTALLATIONS THE RECOMMENDED STANDARD SPACING BETWEEN PARALLEL PIPE RUNS SHALL BE PIPE DIA./2 BUT
NO LESS THAN 12", OR 36" FOR PIPE DIAMETERS 72" AND LARGER. CONTACTYOUR
CONTECH REPRESENTATIVE FOR NONSTANDARD SPACING (TABLE C12.6.7-1). TYPICAL
BACKFILL DETAIL PLAN
FRONT
48"
0 to 90"0 FITTING REINFORCEMENT MAY
BE REQUIRED BASED ON HEIGHT OF COVER
AND LIVE LOAD CONDITION TYPICAL
MANWAY DETAIL NOT
TO SCALE TEMPORARYCOVER
FOR CONSTRUCTION
LOADS HEIGHT
OF COVER
110]
1 ZbA: FINISHED
GRADE
FOR
TEMPORARY CONSTRUCTION VEHICLE LOADS, AN EXTRAAMOUNT OF COMPACTED COVER MAY BE REQUIRED OVER THE
TOP OFTHE PIPE. THE HEIGHT -OF -COVER SHALL MEET THE MINIMUM REQUIREMENTS SHOWN IN THE TABLE BELOW. THE
USE OF H EAVY CONSTRUCTION EQUIPMENT NECESSITATESGREATER PROTECTION FOR THE PIPE THAN FINISHED GRADE
COVER MINIMUMS FOR NORMAL H IGHWAY TRAFFIC. AXLELOADS
PIPE
SPAN, INCHES
kips)
18-
50 1 50-75 1 75-110 1 110-150 MINIMUM
COVER FT) 2.
0 2.5 3.0 3.0 12-42 48-
72 3.0 3.0 3.5 4.0 78-
120 3.0 3.5 4.0 4.0 126-
144 3.5 4.0 4.5 4.5 FAIN
IMUM COVER MAY VARY, DEPENDING ON LOCAL CONDITIONS. THE CONTRACTOR MUST PROVIDE THE ADDITIONAL COVER
REQUIRED TO AVOID DAMAGE TO THE PIPE. MINIMUM COVER IS MEASURED FROM THE TOP OF THE PIPE TO THE
TOP OFTHE MAINTAINED CONSTRUCTION ROADWAYSURFACE. CONSTRUCTION
LOADING DIAGRAM NOT
TO SCALE A
36"
0 MAX., HS-25 ACCESS CASTING WITH
GRADE RINGS AS REQUIRED, TO BE
PROVIDED AND INSTALLED BY CONTRACTOR.
MAYBE TOP MOUNTED CMP (
AS SHOWN) OR RECESSED PROTECTION
RIMlFINISHED w
SLAB ---_--
GRADE _ -----_ _ VARIES O G
d tl.
GASKET
MATERIAL E CMP RISER SUFFICIENT
TO PREVENT SLAB
FROM BEARING ON o RISERTOBEPROVIDEDBYCONTRACTOR.
OB 11"TYP. rn
im
SECTION
VIEW ACCESS
CASTING NOT SUPPLIED BY CONTECH d+
L`
cP
B
94
DIAGONAL TRIM BAR (
TYP.4 PLACES), SEE
NOTE 7. II
II1
II IOPENING
IN PROTECTION
SLAB
FOR ACCESS
SPECIFICATION
FOR CORRUGATED STEEL PIPE-ALUMIN [ZED TYPE 2 STEEL SCOPE
HANDLING AND ASSEMBLY THIS
SPECIFICATION COVERS THE MANUFACTURE AND SHALL BE IN ACCORDANCE WITH RECOMMENDATIONS OFTHE INSTALLATION
OF THE CORRUGATED STEEL PIPE (CSP) DETAILED IN NATIONAL CORRUGATED STEEL PIPE ASSOCIATION (NCSPA) THE
PROJECT PLANS. INSTALLATION
MATERIAL
SHALL
BE IN ACCORDANCE WITH AASHTO STANDARD THE
ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TOTHE SPECIFICATIONS FOR HIGHWAY BRIDGES, SECTION 26, DIVISION II APPLICABLE
REQUIREMENTS OF AASHTO M274 OR ASTM A929. OR ASTM A798 AND IN CONFORMANCE WITH THE PROJECT PLANS AND
SPECIFICATIONS. IF THERE ARE ANY INCONSISTENCIES OR PIPE
CONFLICTS THE CONTRACTOR SHOULD DISCUSS AND RESOLVE WITH
THE SITE ENGINEER. THE
CSP SHALL BE MANUFACTURED IN ACCORDANCE WITH THE APPLICABLE
RECJIREMENTSOFAASHTOM360RASTMA760, THE IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO PIPE
SIZES, GAGES AND CORRUGATIONS SHALL BE AS SHOWN ON FOLLOW OSHA GUIDELINES FOR SAFE PRACTICES. THE
PROJECT PLANS. ALL
FABRICATION OF THE PRODUCT SHALL OCCUR WITHIN THE UNITED
STATES. MATERIAL
SPECIFICATION NOT
TO SCALE 1,
i 2Y2" REBAR
CAN BE CUT FLUSH - o ALL
STEEL PER TO
OUTSIDE OF RAIL TOA36
BAR
LENGTH = 163") OR BAR CAN o d 4
EXTEND
BEYOND RAIL Y2"t FABRICATION TOLERANCE: tV4" o
FLATBARANDREBAR:
MILL 318"
TOLERANCE
APPLIES TYP.
12"
TYP. CENTER
TO CENTER W HOLE WI %" REBAR RUNG, RUNG
SPACING o WELD
REBAR TO RUNG ON OUTSIDE
OF STEEL RAIL 0
2Y2"
x Ye" FLAT BAR SIDE RAIL PLAN
SIDE NOTES:
1.
LADDERS CAN BE MADE IN 20'1 STANDARD LENGTHS AND CUT TO FIT 2.
ALL MATERIAL TO MEET ASTM A36 3.
LADDER TO BE HOT DIPPED GALVANIZED PER ASTM A-123 AFTER FABRICATION
IS COMPLETE STANDARD
LADDER DETAIL NOT
TO SCALE PART
NO. HALAGVL16 PROVIDE
MINIMUM OF 4 ATTACHMENT ANGLES (
2 ON EITHER SIDE OF LADDER RAIL) TO
CONNECT LADDER TO RISER EXTENSION RISER
W/ LADDER AND STEPS IF
EXTENSION IS REQUIRED RISER
W/ LADDER AND
STEPS MAINLINE
CMP 22/
3xY2,5x1,3x1,ETC. NOTE:
THIS
DRAWING IS INTENDED TOAPPLYTO LADDERS INSTALLED
IN RISERS HAVING A DIAMETER OF 30" OR LARGER.
DUE TO SPACE CONSTRAINTS AND LIMITED ACCESSIBILITY,
THE PRACTICALITY AND SUITABILITY OF UTILIZING
RISERS SMALLER THAN 30" DIAMETER AND/
OR INCORPORATING LADDERS IN THESE SMALLER DIAMETER
RISERS SHOULD BE ADDRESSED BYTHE OWNER
AND PROJECT ENGINEER x
3" x y"x 16" LONG AT V-0" SPACING.
LONG LEGTO 4
PROJECT OUT. WELD TOP 1'_
g" BOTTOM OF 3" LEG TO EACH jANDZS" MAX. CORRUGATION CREST THESE
ANGLES SHOULD BE USED a
FOR LARGER DIAMETER a
MAINLINES WHERE ADDITIONAL STEPS
ARE NEEDED) INTERRUPTED
BAR REPLACEMENT,
SEE NOTE
6. 4
DIAGONAL TRII BAR (
TYR.4 PLACES: SEE
NOTE i 2"
COVER TYP)
II
OPENING
I PROTECTIO
SLAB
FO ACES
STANDARD
STANDARD REINFORCING,
REINFORCING, SEE
TABLE SEE TABLE ROUND
OPTION PLAN VIEW NOTES:
1.
DESIGN IN ACCORDANCE WITH AASHTO, 17th EDITION
AND ACI 350. 2.
DESIGN LOAD HS25. 3.
EARTH COVER = 1' MAX. 4.
CONCRETE STRENGTH =4,000 psi 5.
REINFORCING STEEL = ASTM A615,GRADE 60, 5.
PROVIDE ADDITIONAL REINFORCING AROUND OPEN
INGS EQUAL TO THE BARS INTERRUPTED, HALF
EACH SIDE. ADDITIONAL BARS TO BE IN THE SAME
PLANE. NOTE:
WHEN RISER EXTENSIONS ARE
USED, THE PLANT SHOULD CUT
3" FROM THE SIDE RAILS AS SHOWN
3"
FROM BOTTOM OF LADDER RAIL
TO RISER JOINT 3"
FROM TOP OF LADDER RAIL
TO RISER JOINT LADDER
RAILS AND RUNGS 2)
Y4" FILLET WELDS 1" LONG ATTACH
M ENT AN C MINIMUM
OF 4 ANGLES P LADDER
SECTION, (2 EACH SIDE LADDER)
6' MAX. SPACI VERTICAL
6"
FROM RUNGTO RISER
JOINT 6"
FROM RUNG TO RISER
JOINT SECTION
A -A RISER
LADDER DETAIL NOT
TO SCALE RISER
NORMALLY CMP WITH
22/3" x Y2" CORRUGATIONS
4)
Y6" FILLET WELDS FROM
EACH ANGLE TO CORRUGATION
CREST 2
WELD EACH SIDE) ZYx3"
x3/ts" 5)/
2" LONG REINFORCING
TABLE BEARING
0
CMP A
BO REINFORCING PRESSURE RISER
PSF) 24
4'
0 26
5 @ 10- OCEW 2,540 4
x4' 5 @ 10- OCEW 1,9C0 30"
4'
1 32
5 @ 10- OCEW 2,260 4'_
6" x 4'-1 5 @ 9" OCEW 1,670 36"
50 36 5 @ 9" OCEW 2,060 5'
x 5' 5 @ 8" OCEW 1,5C0 42'
5'
1 44
5 @ 8" OCEW 1,490 S'
T'-6" x 6" 5 @ 8" OCEW 1,370 48'
6'
0 50"
5 @ 7" OCEW 1,210 6'
x 6 5 @ 7" OCEW 1,270 ASSUMED
SOIL BEARING CAPACIT, SQUARE
OPTION PLAN VIEW 7.
TRIM OPENING WITH DIAGONAL#4 BARS, EXTEND BARS A MINIMUM
OF 12' BEYOND OPENING, BEND BARS AS REQUIRED TO
MAINTAIN BAR COVER. 8.
PROTECTION SLAB AND ALL MATERIALS TO BE PROVIDED AND INSTALLED
BY CONTRACTOR. 9.
DETAIL DESIGN BY DELTA ENGINEERS, ARCH FFECTSAND LAND SURVEYORS, ENDWELL,
NY. MANHOLE CAP
DETAIL 4)%6"
FILLET WELDS FROM EACH ANGLE
CORRUGATION CREST (2
WELDS EACH SIDE) 4) 43"
x 3" x 3/6" 5%2"
LONG 2)Y4'
FILLETWELDS 1" LONG
FROM EACH ANGLE TO LADDER
RAIL NOT TO
SCALE LADDER RAILS
PLAN A
4)%
6"
FILLET WELDS - - - FROM EACH
ANGLE TO CORRUGATION CREST
2 WELDS
EACH SIDE) Z3" x
Tax 3y/18" 5Y2" LONG
IF_ I
ELEVATION LADDER
R,
AND RUNE
SCOTT/R.
CT -Or 'Z Lie. No.
035791 i' A 08/
27/20 Aj En Z
O
ZQOIcau^ U =)_ w
1n a
o z
W
L "
Ce
W" C:)
N
N 1\
in
Lu
m-_
H
Lu
w
O
uJ W
2 a
to JOB
NO. 112066
NOT TO
SCALE
AS SHOWN SHEET NO. 13
DETENTION BASIN'SWM T CONSTRUCTION NOTES:
FACILITY PLANTING SPECIFICATIONS:
1. THE DETENTION BASIN SHALL HAVE A TURF GROUND COVER, SUCH AS GRASS OR SOME OTHER FORM OF A VEGETATIVE GROUNDCOVER. LANDSCAPING BEYOND THIS IS OPTIONALAND
IS NOT REQUIRED.
2. THE PROPOSED INTERIOR SIDE SLOPES OF THE BASIN SHALL BE A MAXIMUM OF 4:1 TO REDUCE THE RISK OF EROSION. THE PROPOSED FLOOR SLOPES SHALL BE GRADED AT A MINIMUM
OF 0.50%TO PROVIDE POSITIVE DRAINAGE AT ALL TIMES TO THE RISER STRUCTURE.
3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET OF THE PRINCIPAL SPILLWAY
STRUCTURE.
4. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS, TO ENSURE STABILITY THE DENSITY OF THESE COMPACTED
SOILS CAN BE SO GREAT THAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND, THEREFORE, MAY LEAD TO PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB,
PLANTING HOLES SHOULD BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER OF THE ROOTBALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR
CONTAINER -GROWN STOCK.
5. EXTRA MULCHING AROUND THE BASE OFTREESAND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTUREAND SUPPRESSING WEEDS.
1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS.
2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE CONTRACTOR SHALL
ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL COPIES ARE AVAILABLE FOR A
FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE
DESIGNERS). ALL DISCREPANCIES SHALL BE BROUGHT TO THE ATTENTION OF COLLINS ENGINEERING PRIOR TO THE CORRESPONDING CONSTRUCTION ACTIVITY.
3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK, PUBLISHED
BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005.
4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN.
5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 1-800-552-7001 BEFORE ANY EXCAVATION).
6. REFER TO THE APPROVED FINAL SITE PLANS FOR ANY DETAILED SITE INFORMATION.
7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES.
8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, STEMS, OR OVERALL SHAPE OF THE STOCK. CONTAINER
GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE GROWN.
9. ALL PLANT MATERIAL, UNLESS OTHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY, VIGOROUS, AND
FREE FROM DEFECTS DECAY DISEASES INSECT PEST EGGS AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL BE FRESH FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT.
PLANTS DEEMED UNHEALTHY WILL BE REJECTED.
10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL. CONTAINER
STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED.
11. PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM
THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALL TIMES BY COVERING THE BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD
CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL.
12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE INSPECTOR INITIALLY, AND THEN
THE DESIGNER.
13. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER.
14. NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN.
15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT
CRAMPING ROOTSTOCK.
16. THE CONTRACTOR SHALL MAINTAIN A ONE 1 CALENDAR YEAR 90%CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN
AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR.
17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS.
18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR's CONTROL.
FACILITY CONSTRUCTION
1. THE DETENTION BASIN MAY SERVE AS A SEDIMENT BASIN AND/OR TRAP DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT
SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED
DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION FACILITY
IN MIND. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONVERTED TO AN DETENTION BASIN.
2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE FACILITY IS COMPLETELY STABILIZED. IF THE SITE OF THE PROPOSED SWM
FACILITY WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THEN THE FACILITY WILL BE DEWATERED, DREDGED AND RE -GRADED TO DESIGN
DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. MODIFICATIONS SHALL BE MADE TO THE RISER, ORIFICES AND BARRELS AS REQUIRED SO THAT THEY ARE
CONSISTENT WITH THE FINAL CONSTRUCTION SPECIFICATIONS.
3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT STAGING AREAS WHEN POSSIBLE.
4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE.
5. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALL AREAS
SURROUNDING THE BASIN THAT ARE GRADED OR DENUDED DURING CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS, NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF
SOIL STABILIZATION.
6. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE DURING THE ESC PHASE.
7. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) WITH PERMANENT COLLARS DURING THE ESC PHASE TO ENSURE THE TOP INVERT OF THE
OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION.
8. THE CONTRACTOR SHALL CONSTRUCT THE EMBANKMENT AND ANY INTERNAL BERMS IN 8-TO 12-INCH LIFTS, COMPACTION SHALL BE COMPLETED IN LIFTS WITH APPROPRIATE
EQUIPMENT. THE CONTRACTOR SHALL ALSO ADHERE TO THE CLAY LINER SPECIFICATIONS OUTLINED IN TABLE 14.4 BELOW:
Table 14.4. Clay Liner SpecmCanons
ProDerty Test Method Unit Specification
Penneability ASTM D-2434 Cm/sec 1 x 10
Plastidly Index of Clay ASTM D.423/424 Not less than 15
Liquid Limit of Clay ASTM D-2216 Not less than 30
Clay Particles Passing ASTM D-422 Not less than 30
Clay Compaction ASTM D-2216 95% of standard proctor density
Source: Virginia Stormwater Management HanabooK (1999)
9. UPON COMPLETION OF THE EMBANKMENT GRADING, THE CONTRACTOR SHALL EXCAVATE/GRADE UNTIL THE APPROPRIATE ELEVATION AND DESIRED CONTOURS ARE ACHIEVED FOR
THE BOTTOM AND SIDE SLOPES OF THE BASIN.
10. CONTRACTOR SHALLTHEN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS.
11. THE CONTRACTOR SHALLTHEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION.
12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW.
13. THE CONTRACTOR SHALLTHEN INSTALLTHE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS.
FACILITY MAINTENANCE:
MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE
FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER:
1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN.
2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE
PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE.
3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING.
4. INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS, IF APPLICABLE, FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY
EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY.
5. INSPECT BASIN OUTFALL CHANNEL, IF APPLICABLE, FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, etc.
6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES.
7. INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES.
8. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED.
9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING.
10. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY.
FACILITY INSPECTION:
MULTIPLE INSPECTIONS ARE CRITICALTO ENSURE THE BASIN(s) ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE
CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED
BY THE CONTRACTOR WITH THE ENGINEER AND INSPECTOR DURING THE FOLLOWING STAGES OF THE DETENTION BASIN's CONSTRUCTION PROCESS:
1. PRE -CONSTRUCTION MEETING
2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS)
3. EXCAVATION/GRADING (e.g., INTERIM/FINAL ELEVATIONS)
4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS)
5. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE(s).
6. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING IF APPLICABLE)
7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE)
e
I /2' zinc plated hook
attached with 2/8' fastener
2-1/8" die. holes
Isometric
1/4" HDPE plate (optional)
pipeiLert .•.
Y.
HDPB structural plastic sillO2-1/8- holes and 1/4' pltatte
OOmanufaatured by Pl..Uc
OOO
Solullona Inc. or equal
0000
1 n.. ,ers;'.- • .ILawn IdN optioned Plate
r id^rdinI HnPF stniclarel pkialr with
2-I/B" holes and 1/4' plate
CCtlOf1 manufactured by Plastic
Solution. Inc. or equal
o' ma Hole.
0 0
o O o
atifi0
e
BNP Ele VHLion ororificeflPLASTIC
p
o. pox sae DEBRIS
CAGE SOLUTIONS Slnebener ra UN4 INC.
B77-IV7-5727 an
pleeli-mluinrnm EMBANKMENT
NOTES: AFTER
AN INVESTIGATION OF THE SITE'S SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN EXAMINATION
OF VA DEQ APPENDIX A: EARTHEN EMBANKMENT, THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT
DESIGN THAT DOES NOT NEED A GEOTECHNICAL STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY
EMBANKMENT DESIGNS PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE
LISTED BELOW, MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS AT MINIMUM. THE
EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS
SHOWN ON IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING &THE REMAINING
DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF
ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL
SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95%OF MAXIMUM DRY DENSITY
AND 2%OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN
ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS. SECTION
A-9: TYPICAL GRAPHICAL, DETAILS Hanogeneous
fill min
DA
off bench-V below nitoael InaterialSail
ar rak L-----------J TYPICAL
HOMOGENEOUS EMBANKMENT
Ironsi6on
ill ode
or gravel Pipe
outlet Course filler arm"
slo s Perforated
collector Foundation drain Bbnket drain FOUNDATION
DRAIN BLANKET DRAIN am
Sera.
9a`•i is ma win
Rock
or grovel Rory
I. drdin sTransib.
filler TMnaikion filler CHIMNEY
DRAIN TOE DRAIN Score:
SCSE,gineennv, Field .11nnunl Figure .. -
la. Hoinogeneous Eni6anknienrs r Seepage Controls 61D5
6o5 PROPOSED
8' WIDE TOP OF DEAM ELEV=592.27 WITH
A 15' WIDE GRASS LINED EMERGENCY SPILLWAY
CREST ELEV=591.1o') 600
600 STR
25: 24" RISER TP=
59 1,10 INV
OUT: 587.00 TO STR 24 595
595 FR
EBOARD coo-
YR PEAK WSE=
59a.a7 EXISTING
GRADE TYP.) PROPOSED
GRADE TYP.) 590
r
to-
YRPEAK WSE=
Sgz.o6 590 WSE
PEAKW_YRPEAKa-YRPEAKWSE=
o.5953 585
4HDPE 585 1
53-
94 LF @ 2.04% 58o
580 PROPOSED
024" HDPE STANDPIPE (STR. 25) WITH TRASHRACK
TO SERVE AS THE RISER STRUCTURE. SEE DETAIL
ON THIS SHEET, OR EQUIVALENT, FOR TRASHRACK.
RISER RIM ELEV.=590.60. RISER TO HAVE BONE
4" LOW -FLOW ORIFICE (INV.=587.00). RISER INV OUT=
587.00 (TO EXISTING DITCH). TO PREVENT FLOTATION
THE RISER BASE SHALL BE FIRMLY EMBEDDED
6" INTO AN 18" THICK REINFORCED CONCRETE
FOUNDATION THAT IS 6'x6', AND BURIED
BELOW GROUND. DETENTION
BASIN SECTION PROFILE StormRaXTV
ROUND
SERIES TRASH RACK CONCRETE
MANHOLE STANDARD
601NCH RACK SHOWN DIMENSIONS
IN INCHES jW:
1:] SIDE VIEW Stormllax"'
Round Series for Concrete Manhole ran
Na DNnA Dime DIMC min ID MInoD RS-
24 17l6 14 Yi 28 24 30 RS-
36 21914 40 36 43 ItS4
nK Uf UX 640 70 Plastic
Solutions, Inc. CLBIDtE2 PO
Box 4386, Wlndh teY, VA a604 238
Mao. 94 W inchasOv, VA 22603 W7)
877-S727 plwro PROW. 540)
722,2219 fa 1Ltgx//
www.11utlo-aaWnm.mm 25
PROPOSED
024" HDPE STANDPIPE (STR. 25) WITH TRASHRACK TO SERVE AS THE RISER / STRUCTURE.
SEE DETAIL ON THIS SHEET, OR EQUIVALENT, FOR TRASHRACK. RISER RIM ELEV =
590 60 RISER TO HAVE ONE 4" LOW -FLOW ORIFICE (INV =587 00 RISER IN OUT=
587.00 (TO EXISTING DITCH). TO PREVENT FLOTATION THE RISER BASE SHALL / BE
FIRMLY EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE / FOUNDATION
THAT IS 6'x6', AND BURIED BELOW GROUND. 2
WIDE PROPOSED GR/, /SS LI ED / EMERGE;
4CY SPILLWAY WJ 4:1 SIDE SLO ES AND
CREST ELEV.=5 i.i 8'
WIDE TOP.OF DAM ELEV: 592.27 592.
4]H I
I DETENTION
BASIN DETAIL: SCALE 1"=20' I
I
I
I 2]
592. ] 2]
592. J s96'
I
S94" S9z_
SCOTT/
R. CULLINS'Z Lie.
No. 035791 i' A
08/27/20 4rj Air
I 1
r
o
IwNOW-
O i
as
4i
c W
PROFILE
SCALES i"=
5' (VERTICAL) i"=
5o' (HORIZONTAL) w
CDcli OUMTER
SECTION REdaVNRL
rgIACCE93 ISOMETRIC
CONCRETE
STRUCTURE DIMENSIONS INSIDE
STRUCTURE DIMENSION OUTSIDE
STRUCTURE DIMENSION AVAILABLE
OPTIONS CROSS
BRACING FOR OVERHANG HDPE
ANTI -VORTEX PLATE DATE
DRANN
BY. APPUBY:
DETAIL
MISSISSIPPI
ry
W
W
2
ti
Cy)
Cyi
CS)
N
4
M
1
N
C:)
N
N
LLJ
J
J
U7
LU
J
Q
U
LU
Y
W
LU
LLU
W
LU
of
Q
C)
C)
N
Q
LLJ
z
LLJ
LLJ
5
2LL
LLJ
I-
LL
O
n
H
LU
0
LU a
In 112066
AS
SHOWN SHEET
NO. 4