HomeMy WebLinkAboutWPO201700048 Plan - VSMP 2021-07-22GENERAL NOTES
OWNER:
DEVELOPER:
ENGINEER:
TAX MAP NO.:
SUBDIVISION ZONING:
TOTAL ACREAGE:
SUBDIVISION STREETS:
DRAINAGE DISTRICT:
DRAINAGE:
AI
WATERSHED:
TOPO & SURVEY:
Al
UTILITIES:
LIGHTING:
PHASING:
COUNTY OF ALBEMARLE VIRGINIA
401 MCINTIRE ROAD
CHARLOTTESVILLE, VA 22902
BEIGHTS DEVELOPMENT CORPORATION
5380 GOLF DRIVE, SUITE 103
CROZET, VA 22932
COLLINS ENGINEERING
200 GARRETT ST., SUITE K.
CHARLOTTESVILLE, VIRGINIA 22902
TELEPHONE: 434.293.3719
FAX: (434)-245-0300
CONTACT: MR. SCOTT COLLINS, P.E.
EMAIL: SCOTT@COLLINS-ENGINEERING.COM
PORTION OF: 055EO-04-00-000BO
R-1 RESIDENTIAL, BONUS LEVEL (CLUSTER DEVELOPMENT)
13.43 ac. (BOUNDARY LIMITS PRIOR TO SUBDIVISION)
CURB & GUTTER
SLABTOWN BRANCH TO THE LICKINGHOLE DRAINAGE
BASIN
THE DEVELOPER PREVIOUSLY CONTRIBUTED TO A
REGIONAL STORMWATER BASIN FUND. WATER QUALITY
COMPLIANCE WILL BE ACHIEVED THROUGH THIS PRIOR
PRO-RATA SHARE CONTRIBUTION, AND THROUGH A NEW
NUTRIENT CREDIT PURCHASE. WATER QUANTITY
COMPLIANCE WILL BE ACHIEVED THROUGH THE
INSTALLATION I VERIFICATION OF CONSTRUCTION OF THE
APPROVED ADEQUATE RIPRAP LINED CHANNEL. THE
APPROVED PLAN ANALYZED THE MS-19 X-SECTION (i.e. THE
RIPRAP LINED CHANNEL) FOR EROSION (2-YEAR) AND
CAPACITY (10-YEAR) TO THE POINT WHERE THE SITE'S
CONTRIBUTING SUBAREA IS LESS THAN 1% OF
LICKINGHOLE CREEK'S OVERALL WATERSHED. THIS
DESIGN AND METHODOLOGY IS NOT CHANGED WITH THIS
AMENDMENT, THOUGH CALCULATIONS HAVE BEEN
PROVIDED SHOWING THE APPROVED MS-19 X-SECTION (i.e.
RIPRAP LINED CHANNEL) REMAINS ADEQUATE.
LICKINGHOLE CREEK
JENNINGS-STEPHENSON, PC. PROVIDED TOPOGRAPEJY LN
2006. BASED ON FIELD RUN AND UPDATED IN 2011..E l
SEWER - ALBEMARLE COUNTY - AVAILABLE ON THE SITE
WATER`: ALBEMARLE COUNTY - AVAILABLE ON THE SITE
NO STREET LIGHTING IS PROPOSED.
CREEKSIDE II, PHASE II CONSISTS OF 3 PHASES:
A, B & C, AS SHOWN ON THE APPROVED SITE PLAN.
CONTRACTOR SHALL VERIFY LOCATION AND ELEVATION OF ALL UNDERGROUND UTILITIES
SHOWN ON THE IN AREAS OF CONSTRUCTION PRIOR TO STARTING WORK. CONTACT
ENGINEER IMMEDIATELY IF LOCATION OR ELEVATION IS DIFFERENT FROM THAT SHOWN ON
PLANS, IF THERE APPEARS TO BE A CONFLICT AND UPON DISCOVERY OF ANY UTILITY
NOT SHOWN ON THE PLANS.
COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTOR'S WORK, SAFETY
PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND REGULATIONS. COLLINS
ENGINEERING SHALL NOT ASSUME RESPONSIBILITY FOR ANY CONSTRUCTION BEGUN PRIOR
TO PLAN APPROVAL.
OLD TRAIL CREEKSIDE Ilk PHASE II
WPO 201700048
(AMENDMENT #1 TO WPO 201200008)
WHITEHALL DISTRICT
ALBEMARLE COUNTY, VIRGINIA
SHEET LAYOUT
SCALE: 1" = 100'
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CREEPHASE IIIIDD PRASE & 2,T
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SCOTT R. LINS'Z
U Lic. No. 035791,E
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SCALE: 1" = 2,000'
Sheet List Table
Sheet Number
Sheet Title
T-1
COVER
SWM-1
STORMWATER MANAGEMENT PLAN
N
TOTAL NUMBER OF SHEETS
VSMP PLAN AMENDMENT #1 PROPOSED CHANGES:
1� THIS PLAN PROPOSES THE REMOVAL OF A BIORETENTION BASIN CONVERSION. THE
NECESSARY STEPS TO MITIGATE THIS MODIFICATION HAVE BEEN TAKEN, INCLUSIVE
OF PURCHASING NEW NUTRIENT CREDITS, UTILIZING THE EXISTING PAYMENT TO
THE LICKINGHOLE CREEK BASIN FUND AND ENSURING THE APPROVED MS-19
X-SECTION OUTFALL REMAINS ADEQUATE.
APPROVALS
DATE
DEPARTMENT OF COMMUNITY DEVELOPMENT
PLANNER/ZONING
ENGINEER
INSPECTIONS
ARB
DEPARTMENT OF FIRE RESCUE
ALBEMARLE COUNTY SERVICE AUTHORITY
VIRGINIA DEPARMENT OF TRANSPORTATION
HEALTH DEPARTMENT
COLLINS ENGINEERING IS NOT RESPONSIBLE OR LIABLE FOR ANY CONSTRUCTION
OR DAMAGES TO THIS PROJECT PRIOR TO ALL FINAL PLAN APPROVALS.
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JOB NO.
112068
SCALE
N/A
SHEET NO.
T-Y
Water Qu4ty Volume RequirejEents
BIORETENTION FOREBAY RECI
ENTS:
Minimum Forebay e= 0.25 inche
pervious square acre
Forebay Depth to ran 4'-6'
Impervious Area=
137,859 sf
Minimum Forebay Volume
2,872 cf
Fo ebay Volume Provided=
6,457 Of
Minimum Bioretention FI a a O=
3,446 sf
Bioretention Floor Are ded=
4,954 sf
First Flush (1/2" o ff) Volume Requi
5,744 cf
First Flush (1/2" notf) Volume Provide
6,320 Of
(Before initial ou ntro'strucure at Elev.=701. 10')
LEVEL SPREADER
CROSS SECTION
UTE SpR
OR Ea vPRVBLE (MN.
STAPLED
T)
BURIED r MIN. a MIN.
euRiEo a
ad
LEVEL UP OF
SM ER
20 OR
FlAT2R
MIN. 6•
LEVEL SPREADE VEGETATED LIP
S SECT
VDOT 03• /357. /5, 056 OR
/57 COARSE MORE ATE IN viuiva E (NI .
LVANIZED WIRE NESH aA5 SECURE WIRE ME5R TO TIME
n FILTER CLOTN 6X6 T TED TIMBER
SECURE WINE TO G 6 MIN— —
'MTH WERE STAPLES — Z er..e m
I ' MIN 6•
LEVEL SPREADER WITH RIGID LIP
• MN. PHYSICAL REOUIRENENIS Of ROPER OLOnI Ko ea N go. k SPEC. 3.19, MPHP
ource: Va. DSWC and N.C. Erosion and Sediment
Control Planning and Design Manual Plate 3.22�
FIGURE 3.01 - la
Homogeneous Embankments w/Seepage Controls
mogeneous rill
I
ul off trench-4 below suitable
material
Sail or rack L_-_________J
TYPICAL HOMOGENEOUS
EMBANKMENT
Transition fill
ock or grovel
—Pipe outlet Coors fit r
Perforated collector arouned slogs ,Blanket in
Foundation drain
FOUNDATION DRAIN BLANKET DRAIN
ChhNq drain
Sand: gravel a rack
dmin outkl
Rack or gravel
Rack to dr01R
Transition filter Tmnsdlon filter
CHIMNEY DRAIN TOE DRAIN
c:\3_01-1a
EI f F b Area of BTnFTT TER _2
Bill
ore By
a
Elevation
retention B
olume (cf)
(ft)ours
(sf)
cf)
ntours
3
0
700
0
701
1,164
701
5,631
702
1
2,618
702
12,517
704
6,457
704
O,1
30,005
706
0
6,457
706
12,91
52,966
707.5
0
57
707.5
15,126
73,975
Note: F
y surface area
at ion 700'is 20% of the overa
ter surface area at
ion 700'
2499CG3 III
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BIOFILTER #2 PLANT LIST
KEY
Only.
BOTANICAL NAME
COMMON NAME
MINIMUM INSTALLED SIZE
ROOT TYPE
REMARKS
CHV
CHIONANTHUS IICUS
FRINGET
Af
2" CAL.
B&B
LE STEM
COS
10
RNUS S A
RED -TWIG DOG
18"-24" SPREAD
'WONT.
ENSE/FULL
HVI
IGL
S
19
I%WVIRGINIANA
IL A
COMMON WITCHHAI
INKBERRY HOLLY Am
V HEIGHT
T-W HT.
IF
imDENSE/FULL
SINGLE LEADER
LST
7AW
IDA STYRACIFLUA
TUNDIL
ROTUNDILOBA GUM
2" CAL.
&B
INGLE LEADER
MYPN
MYRICA PENS CA
NORTHERN RRY
18"-24" SPREAD
CONT.
/FULL
NSY
NYSSA SYLVATICA
BLACK
2" CAL.
B&B
SI ADER
VBDN
10
VIBURNUM DENTATU
ARROW OOD VIBURNUM
34 HT.
B&B
DENSE FULL
AN
3
ANDROPOGON GERARDI
BIG BLUESTEM
4" POT
CONT.
PV
74
ANICUM VIRGATUM
SWITCH GRASS
4" POT
CONT.
NTS
�TH 0F�
3" OF PEA GRAVEL
FOREBAY EMBANKMENT & 5' WDEALRAPIZOIDAL
FOREBAY SPILLWAY SHALL BE
SHALL BE PLACED
O
DRAINAGE
BETWEEN THE FlL TE
CONSTRUCTED OF GABION BASKS
TH VDOT iy3 COARSE AGGREGATE ON THE UPHILL
�
OUTLET
MEDIA AND THE
SIDE OF THE WEIR & CLASS I
P ON THE DOWNHILL SIDE OF THE WEIR. GE07EX77LE
SCOTT R. LINSZI
FILTER FABRIC UNDERLAYMEN
LL BE INSTALLED. 6' WIDE FOREBAY DAM ELEV.=704'
UNDERDRAIN MEDIA
& WEIR CREST ELEV.=702'-
)x6'(L)x2'(D)
U Lic. No. 035791,E
\
FIRST FLUSH
CLEAN-OUT
4- 015" CL. IV RCP BARRELS SHALL SERVE AS
'-0po� 7/14/21
\
WATER
F
AN EMERGENCY OVERFLOW (20 LF ® 1.09 INV.
DISCHARGE APRONS
\ SURFACE
OUT CAP
ELEV.= 700.5 (TYP.
IN= 704.75, INV. OUT= 704.55). PIPES SHALL
,�, `ti
SSIONAL ECG
Z
\
075
HAVE 6" OF HORIZONTAL SEPARA77ON & SHALL BE
SHALL PROVIDE PROPER
ELEV.= 701.02'
O-yr WSE=704
ENCASED IN CONCRETE IN ACCORDANCE w/
w
SCOUR PR07EC77ON PRIOR
6' OF FREEB
COUNTY, STA7E & VDOT REGULA77ONS &
TO RELEASING RUN-OFF
SPECIFICATIONS. CONCRE7E VAULT HOUSING PIPES
z
ONTO 7HE FILTER MEDIA
0 0%
A DA" A�^�
SHALL BE A MINIMUM OF 2.25'Dx7.5'Wx20'L.
N
SLOPE
T 701 1'�
15 ADS PIPE.,
z
W (63.5 LF,• 0.5OX INVIN=694.31} INV.OUT=694.0)
REPAIR & REPLACE ,
SASIN's BARREL SHALL OUTFALL INTO PROPOSED
o
AS NECESSARY, THE
VDOT STD. EC-1, CL. 11, TYPE A RIP -RAP w/
¢
w
ENERGY DISSIPATER,
CLASS /RIP -RAP 2' ELEV.=
700'
EOTEXTILE FABRIC UNDERLAYMENT (9'Wx50'Lx2'D).
O
DEPTH W/ FILTER
2 5'
ROPOSED RIPRAP CHANNEL SHALL EXTEND TO
EXISTING BANK OF LICKINGHOLE CREEK.
of
a
N
FABRIC
MIN.
\
¢
n
U
UNDERLAYM£NT,
\
p
W=21' & L=35'^
<-•
.0
MIN.
LICKINGHOLE
CREEK BANK
Z
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W
V)
3
O Genera) Biofilter Co ion Notes: AW
o 1. Biofilters shall not talled and site is determined to be adequately General construction notes for Stormwater Management plans ZO Lu w
stabilized by the eros/o rot an er resources inspectors, i. All dams and constructed fill to be within 9S%of maximum dry density and 2%of BOTTOM OF B/OF/L TE 1 MIN. Q °C 2 Q
2. The water resources in or inspect the under -drain installation and optimum moisture content. All fill material to be approved by a geotechnical engineer. MIX ELEV. = 696.5' STA 0VED M1X /A a k O 0 axi
O 0
approve the soil mix prior g the biofilter, and approve the completed A geotechnical engineer is to be present during construction of dams. " " w A T EV.= MIN. 8' WIDE @ TOP & V of rJ
0 4 —6 RFORATED SCHEDULE /
Q installation. Therefore the fo note will be added to the stormwater/BMP z. Pipe and riserjoints are to be watertight within stormwater management facilities. 700' (T -7H= 12' DEEP IMPERVIOUS Ln ro z m y
p plan: 3. For temporary sediment traps orbasinswhich areto beconvertecto permanent UNDERDRAIN GRAVEL 40 PIPE OR EQUIVALENT Z LU
6RLm OHS O Contractor shall contact th ources inspector 24 hours prior to stormwater management facilities; conversion is not to take place until the site is (AASHTO M43 MIN. Al 1.0.- SLOPE (MIN.) TO DI
2.5' SLOPE o% CORE w A CUTOFF o
back8lling the biofilter a ues spection and approval of the stabilized, and permission has been obtained from the County erosion control I' ABOVE & BELOW OR STORM DRAIN PROVIDE TRENCH & 1: 1 SIDE O p ¢ Z o L
under -drain installation he soi inspector. UNDERDRAIN PIPE) ACROSS ENTIRE WIDTH ® SLOPES. SEE DETAIL ON N (n t � 0 3
20' O.C. THIS SHEET FOR w z ¢ o
LXMENRwMARE FpIRErEABIDEOILY ADDITIONAL INFORMATION. a o
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ouwrr'. MnTeRweeHaicaxrawnroesTMauwaR,oErotom STORMWATER MANAGEMENT AMENDMENT #1 NARRATIVE: rI
EMNr'. GbTIHOBPAEfYPHBHF➢4MIHAwACNPNNr ;xwTµpoxw[w.gT"wXE,G+UUG:.wv "� / r \ ¢ Ln U
LOOwxa GENCEAVNU&E UFCw REWEBr9EF OR4WINRwJ. urtCUIdVROlA ra0.TxEaaC108uiEromxFAe Nx,EwNWOwYrtMlrv.TRE OVERALL: LU
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^'° THE APPROVED W PO 201200008 PLANS SPECIFY FOR THE CONVERSION OF A SEDIMENT BASIN TO A \ `- O
.. 0
/ - BIORETENTION BASIN. HOWEVER WITH THIS AMENDMENT, AND THE STABILIZED SITE AND BASIN, THE to o
- / SEE C NNEL AD UACY EXHI R ORT PROPOSED CONVERSION IS NO LONGER NECESSARY AND LIMITED MODIFICATIONS TO THE FACILITY ARE / \ > > "
_ w
FOR ADDJTIONAL DE S/CA CULATIO S NEEDED. THESE MODIFICATIONS INCLUDE PROPER INSTALLATION & MAINTENANCE OF THE RIPRAP LINED �= \ \ j-- 0
/ 1 ` � OUTFACE CHANNEL, CONVERTING THE RISER TO HAVE AN INLET TOP AND STABILIZING THE SEDIMENT BASIN M "\ � \ � � �
/ / // /✓ / /� I I I I I \ RI P DITCH T A 7 og c NWITH POSITIVE DRAINAGE TO THE NEW INLET. THIS PLAN ALSO SHOWS CONTINUED COMPLIANCE WITH \ \ \
STORMWATER REQUIREMENTS. PLEASE SEE THIS SHEET AND THE ATTACHED CALCULATIONS FOR ADDITIONAL \ \
=1' (WORSARID- INFORMATION. \_ \
ASSU NOT ROU71N(;9'1 \ \ \ \
D ft.;'n'=o.o8B;�_i.3% WATER QUALITY:
Ot 7 AL\ SHALL DRAI%T60 PROPOSED CHANNEL{' / / THE APPROVED PLAN ACHIEVED WATER QUALITY COMPLIANCE THROUGH A CONTRIBUTION TO THE LICKINGHOL 1 \
CONSISTINOF VDOT SM-EC--I;CLTYPE A \� / / BASIN FUND AND A BIOFILTER TREATING THE FIRST Z" OF RAINFALL. THIS AMENDMENT HOWEVER PROPOSES TO o R11� RAP w GEOTEXTILE FABRIC UNDER ENT. /Tj6 ELIMINATE THE CONVERSION TO A BIOFILTER AND ACHIEVES WATER QUALITY COMPLIANCE THROUGH THE / \ \ \ ^ o ,y
/ l( I CHANNEL SHALL 7fE ,(9'Wx20 Lx2'D). PROED '�s \ / / PREVIOUSLY PAID CONTRIBUTION TO THE LICKINGHOLE BASIN FUND & THROUGH A NEW NUTRIENT CREDIT / l \ \ 1 \ \rq
� ,(\� RIPRAP CHANNEL SHALL AND TO EXISTIN¢ BANK. ) \ / // PURCHASE. / I \ ¢Q ^ o
WATER QUANTITY: / / I I I o
THE APPROVED PLANS UTILIZED AN ADEQUATE RIPRAP LINED CHANNEL THAT WAS NOT EROSIVE DURING THE / I
/ 2-YEAR DESIGN STORM AND WAS CONTAINED WITHIN ITS BANKS DURING THE 10-YEAR DESIGN STORM. THIS
CHANNEL, LABELED WS-19 X-SECTION' ON THE APPROVED PLANS, EXTENDS TO THE LICKINGHOLE CREEK BANK x
WHERE THE ANALYSIS ENDS SINCE THE SITE'S CONTRIBUTING DRAINAGE AREA IS 1% OF THE CREEK'S OVERALL E
WATERSHED. THIS METHODOLOGY IS PER THE APPROVED PLANS AND THIS AMENDMENT DOES NOT MODIFY THE
ADEQUATE CHANNEL OR THE CONCEPT. THIS AMENDMENT DOES HOWEVER CONFIRM THE APPROVED 'MS-19 o
X-SECTION' CONTINUES TO NOT BE EROSIVE DURING THE 2-YEAR DESIGN STORM AND CONTINUES TO NOT
OVERTOP DURING THE 10-YEAR DESIGN STORM. THIS DESIGN ALSO REMOVES THE EXISTING TEMPORARY
SEDIMENT BASIN BY MODIFYING ITS RISER TO HAVE AN INLET TOP AND TO ENSURE THE FACILITY REMAINS DRY, /
STABILIZED &SLOPED TOWARDS THE NEWLY INSTALLED INLET TOP. / EXISjING VAR.441DT � � � >
PLEASE NOTE, THIS PROJECT HAS AN APPROVED STORMWATER QUANTITY WAIVER DATED 9/26/05. THOUGH THIS / / / GR ING & DRAINAGE
WAIVER WAS NOT UTILIZED WITH THE APPROVED PLAN, THIS WAIVER WILL NO LONGER BE VALID WITH THE ES T. / co
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APPROVAL OF THIS AMENDMENT SINCE THE WAIVER RELIED PARTIALLY ON THE INSTALLATION OF A BIOFILTER.
THIS IS IN ACCORDANCE WITH PRIOR COUNTY ENGINEERING DIRECTION DATED 3/30/17. / /
IN KEEPING WITH THE APPROVED PLAN, WATER QUANTITY COMPLIANCE FOR THIS AMENDMENT WILL BE w
/ \ \ ADDRESSED THROUGH THE USE OF THE RIPRAP LINED CHANNEL (i.e. MS-19 X-SECTION). CHANNEL PROTECTION / i EXISTINCGRAD�D
IS MET THROUGH 9VACCTION -66, SUBSECTIONS HE F AND USE AND FLOOD PROTECTION IS MET THROUGH / i EAR HEN�,4CCESS / co
3
I fff yyyy 9VAC25-870-66, SUBSECTIONS C.2.a AND C.3.a. THE FLOWS USED IN THESE ANALYSES WERE TAKEN FROM THE � �
APPROVED POST -DEVELOPMENT INFLOW HYDROGRAPHS AND ASSUMED ZERO ATTENUATION OCCURS ONSITE. AD// o
// / SEE THIS PLAN AND THE ACCOMPANYING STORMWATER MANAGEMENT CALCULATIONS PACKET FOR DETAILS. �2A' /
/ 1'J _ ' L n
\ I 2� 1 / /— /S / CN
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J I /w \ / �5 _ — /� / I / / / / / -RE A!R'& REPL�I CE, AS 0 z
— FESSA SHE E
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=146.96' .... j �_—RAP/ / > w Q o
_ (TOP MA OLE �� /
_ / � � � /2 � W��IL TER FABRIC C c
/R/AYMEINT, W=21 & L=35' / J G o
\ — / EXISTING / / E CONTRACTOR SHALL D THE TEMPORARY SEtiJIF1E T / " J C' �n
_ BASIN UTILIZING 77B,
.FIL� ` � -o
CONTRAE ORSFALL VERIF TH�FkONSTRUCTION ' o
CONTRACTOR HDPEOUTF(11=6g ). HE -- / /- ,�� / -RAILWAY W a
�9� / CONTRACTOR SHALL N H 0z " HDPE RISER w a
STRUCTURE TO E P RVED R EINLET TOE / \
II `" � / / �� / LOCATED AT A IN's LO DINT. THE CONTRACTOR / // -74 Uj
/ SHALYF� THE FLOOR ELE ATIONSASSN�EEDEDTO
� / / EN�SGREP TIVEhL'OPES TO TH NEWLY INSTALLED�ET / // — / O > �^
1 I I I` / -� •� �� 7 / TO O�IiRACTOR SHALL --THE LY PERMANENT / / j / J Q L
1 T / ryA _ STA IL ATION MEASURES TO THE ARREN S�Dl S&EN RE / —
AP LINEDCHANNEL OUTFA L HAS BEEN INS / / < ��
J PER THE APPROVE ANS. / / / \\ N Q Lu 2
I
l/ �J l / / / �STINGIVAR. WlDT�7�/ / / // / \ I TIE—IN TO U U) Q� o
/ L
/GRADING & D AINAGE „ / / / ) EXISTING 1 Q W
14 RIPRAP DI CH / ESM / / / / / / III TRAIL WAY �l Y
S D=1y / / / /�Ir
/ / / / / / / PROPOSED Q o
17 \� /�/ , TRAIL WAY LU 1 E
\ �Lo BASIN'S BARREL SHALL 0 TF L I9y(�•,0 /'c�" / / o
I2I \ \ BENTS\A K \\ %\\\ PROPOSTYPE A ED
VDOTRAP TU. EG N w L.'Nh / —�` /� / / / / �/ / , \ Lfi F ~_ O Z
GEOTEXTILE FABRIC NT / / / / �l \ O W w ~ w
CHANNEL SHALLPEX7ENDE�O I�STIN� ��� ��� / a �✓ ®/ / \' O O 0 z
BANK OF LICKI GHOLE CR E / / �/-1 ° O
Jul w
10
10 ck�
100 YR Q
FLOODPLAIN U
ELEV.
i of \
/ / �° ° \ _ / �IMITS OF 100' / I N
/ y t� STREAM But- "t / I i
\ O /
\ \ /
O IN ACCOR NC WITH APPROVEfI �HEET10F2, F E
"LICKINGH�CREEK REPRESENTS WHERE THE SITE's
o / / / O / CONTRIBUTING DRAINAE AREIS APPROXIMATELY 1% O = o
\ ° ° fHE CHANNEL's CONTRIBUTING DRAINAGE AREA." IL ul
/ LEASE SEE THIS AMENDME)�SWMCALCULATIONS PACKET JOB NO.
As
o o° / / \ FOR CONFIRMATQNTH TTHE MS-19 X-SECTION_--
/// CONTINUESTO BEADEQFON 0
STORMWATER Qt7ANT(T ° O 112068
OMPL0
3/ / sk' / � ALE �0
\�EXISTING (�A WIDTH / CAN O O SCALE
BASIN'S BARREL SHALL OUTFALL IN / \N O
PROPOSED VDOT STD. EC-1, CL. ll,
/ / j / / /�/ RAGING & DRAINAGE /\C� R���� 0 AS SHOWN
TYPE A RIP
CHANNEL w \ �" \ 9� / o ° / o ESMT. / / C / Do 0
GEOTEXTILE FABRIC UNDERLA MEN- `\ o ° o ° / // O SHEET NO. n
(9'Wx8O'Lx2'D). PROPOSED RIPR \\ e / o p o o ° ° SCALE: '� / P OPOS D SW / / /��
o n _ ' / / / EAS MEN- / / / @ SWM-1 M
CHANNEL
LICKINGHOLE CRO ISTIN G �� 2 �j���//�/ / 0 0 0 0 1 -100 �.�/ / E�PANSION l