HomeMy WebLinkAboutWPO201700048 Plan - VSMP 2021-07-14OLD TRAIL CREEKSIDE Ilk PHASE II
OLD TRAIL
CREEIfSIDI
PHASE III- &
OLD TRAIL
CREEA'SIDE
RASE / & 2
GENERAL NOTES
OWNER:
COUNTY OF ALBEMARLE VIRGINIA
401 MCINTIRE ROAD
CHARLOTTESVILLE, VA 22902
DEVELOPER:
BEIGHTS DEVELOPMENT CORPORATION
5380 GOLF DRIVE, SUITE 103
CROZET, VA 22932
ENGINEER:
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
TAX MAP NO.:
PORTION OF: 055EO-04-00-000BO
SUBDIVISION ZONING:
R-1 RESIDENTIAL, BONUS LEVEL (CLUSTER DEVELOPMENT)
TOTAL ACREAGE:
13.43 ac. (BOUNDARY LIMITS PRIOR TO SUBDIVISION)
SUBDIVISION STREETS:
CURB & GUTTER
DRAINAGE DISTRICT:
SLABTOWN BRANCH TO THE LICKINGHOLE DRAINAGE
BASIN
DRAINAGE:
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
1 NUTRIENT CREDIT PURCHASE. WATER QUANTITY
COMPLIANCE WILL BE ACHIEVED THROUGH THE
INSTALLATION / 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.
WATERSHED:
LICKINGHOLE CREEK
TOPO & SURVEY:
JENNINGS-STEPHENSON, PC. PROVIDED TOPOGRAPHY IN
2006, BASED ON FIELD RUN AND UPDATED IN 2011 SITE
WAS I L V I IE I E 2 1.
UTILITIES:
SEWER - ALBEMARLE COUNTY - AVAILABLE ON THE SITE
WATER`: ALBEMARLE COUNTY - AVAILABLE ON THE SITE
LIGHTING:
NO STREET LIGHTING IS PROPOSED.
PHASING:
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.
WPO 201700048
(AMENDMENT #1 TO WPO 201200008)
WHITEHALL DISTRICT
ALBEMARLE COUNTY, VIRGINIA
IRRQD LtiLL ROAD- V
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74 6 96'
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SHEET LAYOUT
SCALE: 1" = 100'
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VICINITY MAP
SCALE: 1" = 21000,
SCOTT R. LLINS�
U Lic. No. 035791 .1�
7/14/21w
9 IONAL
Sheet List Table
Sheet Number
Sheet Title
T-1
COVER
SWM-1
STORMWATER MANAGEMENT PLAN
2
TOTAL NUMBER OF SHEETS
VSMP PLAN AMENDMENT #1 PROPOSED CHANGES:
LTHIS 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.
APPROVED
by the Albemarle County
Community Development Department
Date 09/14/21
File WP0201700048
(Amendment #1 to WP02012-00008)
Approved with 9/27/21 Nutrient Credit
Purchase, 3.601b., approved 10/5/21
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-1
Water Qu4ty Volume RequireKlel
BIORETENTION FOREBAY REQ
ENTS:
Minimum Forebay e= 0.25 inche
pervious square acre
Fo ebay Depth to ran 4'�'
Impervious Area=
137,859 sf
Minimum Forebay Volume
2,872 cf
Forebay Volume Provided=
6,457 cf
Minimum Bioretention FI ea a D=
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" noff) Volume Provide
6,320 cf
(Before initial o ntro'strucure at Elev.=701. f0')
LEVEL SPREADER
CROSS SECTION
UTR G
STA EPLFD Imo- vgRlaeLE (MIN.
]')
BURIED 6 MIN. I 6' MIN.
GURIED 8
LEVEL UP OF
SPREADER
2A OR
MTIEfl
MIN, e•
LEVEL SPREADE VEGETATED LIP
S SECT
VDOT /5. /357, /5, 056 OR
57 COARSE AGGREGATE IN vudABLE (MI .
LVANRED WIRE MESH RA5 SECURE WIRE MESH To TIME
• fli CLOTH "A TREATED AMBER
SECURE WINE TO G B• MM.
WITH WIRE STAPLE5 -d. e•e.e .� ------ -
' ' MIN. 6'
LEVEL SPREADER WITH RIGID LIP
• MN. PIMCAL REQUIREMENTS OF MLTER CLORI NOTED N M. & SPEC. 3.19, MPRAP
ounce: Va. DSWC and N.C. Erosion and Sediment
Control Planning and Design Manual Plate 3.21-
FIGURE 3.01 - IN
Homogeneous Embankments w/Seepage Controls
mogeneaus rill
I
-cul off trench-4' below suitable/
material
Soil or rock L - - - - - - - - - - - J
TYPICAL HOMOGENEOUS
EMBANKMENT
Transition fill
ock or gravel
-Pipe outlet Coarse fillP�
Perforated collector aroun so Blanket drain
Foundation drain
FOUNDATION DRAIN BLANKET DRAIN
Chimney drain
Sand gravel cr mek
dmn aijW
Rock or gravel
Rack 1a ; oa a dralR
Transition filter Transition filter
CHIMNEY DRAIN TOE DRAIN
r.\3_01-1a
PR T
DRAIN_
= 2.92 AC
r A IN
VAA�\ V A A \A VAA�\VA
110
\$,CLE
Area of
EleAetio
ea of Forebay
a
Elevation
retention B
(ft)
tours (sf)
cf)
ntours
7)0
3
0
700
7)l
1'164
701
7)2
1
2,618
702
704
6,457
704
0,1
706
0
6,457
706
12,91
707.5
0
57
707.5
15,126
Note: F
y surface area
at ion 700' is 20% of the overa
ter surface area
qw
VP
2499CGS
AWNaf.6RWNIAA•1N-0OfiaN
MYROR M90Hr NM I0.4£ • IN. W IHB
E
I ems
Ilume (cf)
0
5,631
12,517
30,005
52,966
13,975
lion 700'
BIOFILTER #2 PLANT LIST
KEY
Ditty.
BOTANICAL NAME
COMMON NAME
M INSTALLED SIZE
ROOT TYPE
REMARKS
CHV
CHIONANTHUS IICUS
FRINGET
2" CAL.
J18"-24"
B&B
LE STEM
COS
10
RNUS S A
RED -TWIG DOG
SPREAD
ONT.
ENSE/FULL
HVI
IGL
S
19
VIRGINIANA
IL A
COMMON WITCH411W
INKBERRY HOLLY
V HEIGHT
3'-4'HT.
AL
SINGLE LEADER
DENSE/FULL
LST
7
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
3-4' HT.
B&B
DENSE FULL
AN
3
ANDROPOGON GERARDI
BIG BLUESTEM
4" POT
CONT.
PV
74
ANICUM VIRGATUM
SWITCH GRASS
4" POT
CONT
stabilized by the erosio,
2. The water resources 1
approve the soil mix prior
installation. Therefore the
plan:
Contractor shall contact tt
backfilling the biofilter any
under -drain installation
BIOFILTER 42
3" OF PEA GRAVEL NTS
SHALL BE PLACED FOREBAY EMBANKMENT & 5' KIDEALRAPIZOIDAL FOREBAY SPILLWAY SHALL BE
DRAINAGE
BETWEEN
THE FlL TE
CONS7RUCICU OF GABION BASKE
TH VDOT3 COARSE AGGREGATE ON THE UPHILL
SIDE OF THE WEIR & CLASS I
P ON THE DOWNHILL SIDE OF THE WEIR. GE07EXTILE
OUTLET
MEDIA
AND THE
FILTER FABRIC UNDERLAYMEN
LL BE INSTALLED. 6' WIDE FOREBAY DAM ELEV.=704'
UNDERDRAIN MEDIA
& WEIR CREST ELEV.=702'-
)x6'(L)x2'(D)
\
FIRST FLUSH
4- 015" CL. IV RCP BARRELS SHALL SERVE AS
WATER
CLEAN -OUT W/ F
AN EMERGENCY OVERFLOW (20 LF ® 1.0% INV.
\
SURFACE
WATER77GHT CAP
IN= 704.75, INV. OUT.= 704.55). PIPES SHALL
DISCHARGE APRONS
\
ELEV.= 700.5 (TYP. 075
HAVE 6" OF HORIZONTAL SEPARATION &SHALL BE
SHALL PROVIDE PROPER
ELEV.= 701.02'
O-yr WSE=704
ENCASED IN CONCRETE IN ACCORDANCE w/
SCOUR PR07EC77ON PRIOR
6' OF FREEB
COUNTY, STATE & VDOT R£GULA77ONS &
RELEASING RUN-OFF
24„
SPECIFICATIONS CONCRETE VAULT HOUSING PIPES
O
ONTO THE FILTER MEDIA
0.07.
ANDA
SHALL BE A MINIMUM OF 2.25'Dx7.5'Wx2O'L.
SLOPE
7017E
15' ADS PIPE.
(63.5 LF- 0.50X INVIN=694.3l'- INV.OUT=694.0)
REPAIR &REPLACE,
BASIN's BARREL SHALL OUTFALL INTO PROPOSED
AS NECESSARY, THE
_
VDOT STD. EC-1, CL. Il, TYPE A RIP -RAP w/
ENERGY DISSIPATER,
CLASS /RIP -RAP 2' ELEV.= 700'
EOTEXTILE FABRIC UNDERLAYMENT (9'Wx50 Lx2'O).
DEPTH W/ FILTER
2 5'
ROPOSED RIPRAP CHANNEL SHALL EXTEND TO
EXISTING BANK OF LICKINGHOLE CREEKBRIC
UNDERLAYMENT,
MIN.
W=21' & L=35'
c
' O
LICKINGHOLE
CREEK BANK
MIN.
is determined to be adequately
Perrsirtesources
General construction notes for Stormwater Management plans
BOTTOM OF BIOFILTER
1 MIN.
inspectors.
,.AII damsand constructed fill wi hin % fmaximum r n i n z°r6 f
da s a d co st ucted to be t g5 odry density ty and o
'nspect the under -drain installation and
optimum moisture content. All fill material to be approved by a geotechnical engineer.
MIX ELEV. = 696.5'
STA
the biofi/ter, and approve the completed
A geotechnical engineer is to be present during construction of dams.
4"-6" RFORATED SCHEDULE
w/ A
a will be added to the stormwater/BMP
2. Pipe and riserjoints are to be watertight within stormwater management facilities.
UNDERDRAIN GRAVEL
40 PIPE OR EQUIVALENT
700'
irces inspector 24 hours prior to
3. For temporary sediment traps or basins which are to be converted to permanent
stormwater management facilities; conversion is not to take place until the site is
(AASHTO M43 MIN.
AA 1.0% SLOPE (MIN.) TO DI
2- 5'
ispection and approval of the
stabilized, and permission has been obtained from the County erosion control
I' ABOVE & BELOW
OR STORM DRAIN PROVIDE
inspector.
UNDERDRAIN PIPE)
ACROSS ENTIRE WIDTH
Lic. No. 035791
7/14/21 14
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9 MIXMIN. 8' WIDE @ TOP &
,,ww
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TRENCH & 1:1 SIDE
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SLOPES. SEE DETAIL ON
1.4
W
THIS SHEET FOR
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ADDITIONAL INFORMATION.
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MANAGEMENT AMENDMENT #1 NARRATIVE:-
Fp1.UN6N
,FORBOD EfM ra]xeoNLawEromxw
mPaxeoPEN, ucEn NNPEaRcwNnsx
OVERALL:
OVERALL:LU
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THE APPROVED WPO 201200008 PLANS SPECIFY FOR THE CONVERSION OF A SEDIMENT BASIN TO A
\_ - _ \
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/
BIORETENTION BASIN. HOWEVER WITH THIS AMENDMENT, AND THE STABILIZED SITE AND BASIN, THE
/ // //
,/ +
/ • / / / /
SEE CHANNEL AD UACY EXHI REPORT
/ FOR ADD17NAL DE S/CA CULATIO S
PROPOSED CONVERSION IS NO LONGER NECESSARY AND LIMITED MODIFICATIONS TO THE FACILITY ARE
NEEDED. THESE MODIFICATIONS INCLUDE PROPER INSTALLATION & MAINTENANCE OF THE RIPRAP LINED
OUTFALL CHANNEL CONVERTING THE RISER TO HAVE AN INLET TOP AND STABILIZING THE SEDIMENT BASIN
/
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RI P DITCH ,o=7.og cWITH POSITIVE DRAINAGE TO THE NEW INLET. THIS PLAN ALSO SHOWS CONTINUED COMPLIANCE WITH
/ f REQUIREMENTS. PLEASE SEE THIS SHEET AND THE ATTACHED CALCULATIONS FOR ADDITIONAL \
(WORST CA C NARK INFORMATION. STORMWATER RE
ASSU OT ROU71N Q
_ N\
�,, A �' D ft.;'n'=o.o8�,.3% WATER QUALITY:
/ l I OUTFALL' SHALL DRAIMT PROPOSED CHANNEL THE APPROVED PLAN ACHIEVED WATER QUALITY COMPLIANCE THROUGH A CONTRIBUTION TO THE LICKINGHOL 1
C NSISTINO„,OF VDOT SC_-Y CL` TYPE A / / / / BASIN FUND AND A BIOFILTER TREATING THE FIRST ' OF RAINFALL. THIS AMENDMENT HOWEVER PROPOSES TO / \ \ \ o
Rl-RAP w/' G�EO�TEXTILE FABRIC UNDERLAENT. \ /jj6 ELIMINATE THE CONVERSION TO A BIOFILTER AND ACHIEVES WATER QUALITY COMPLIANCE THROUGH THE ^ o ,y
CHANNEL SHALL 7fE,�9'Wx20 Lx2'D). PROPO ED �T6 / / PREVIOUSLY PAID CONTRIBUTION TO THE LICKINGHOLE BASIN FUND & THROUGH A NEW NUTRIENT CREDIT i J 1 1 2
RIPR� CHANNEL SHALL EXTEND TO EXISTIN¢ BANK. ) \ / PURCHASE. / \ I \ QQ 00 \ ti
ME) LID 0
WATER QUANTITY: /
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'MS-19 X-SECTION' ON THE APPROVED PLANS, EXTENDS TO THE LICKINGHOLE CREEK BANK / \
rl \ WHERE THE ANALYSIS ENDS SINCE THE SITE'S CONTRIBUTING DRAINAGE AREA IS 1% OF THE CREEK'S OVERALL
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 /
' I 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. / EXISTING VAR.�YIDT >
c \ / ®
PLEASE NOTE, THIS PROJECT HAS AN APPROVED STORMWATER QUANTITY WAIVER DATED 9/26/05. THOUGH THIS / / GRADING & ES•/•L9
T
\ / / WAIVER WAS NOT UTILIZED WITH THE APPROVED PLAN, THIS WAIVER WILL NO LONGER BE VALID WITH THE / MRAINAGE C
APPROVAL OF THIS AMENDMENT SINCE THE WAIVER RELIED PARTIALLY ON THE INSTALLATION OF A BIOFILTER. :�
/ / / / /j
THIS IS IN ACCORDANCE WITH PRIOR COUNTY ENGINEERING DIRECTION DATED 3/30/17. /
1 -
IN KEEPING WITH THE APPROVED PLAN, WATER QUANTITY COMPLIANCE FOR THIS AMENDMENT WILL BE Z'
ADDRESSED THROUGH THE USE OF THE RIPRAP LINED CHANNEL (i.e. MS-19 X-SECTION). CHANNEL PROTECTION / i EXISTINGIGRAD�DZVI
CY) IS MET THROUGH 9VAC25-870-66, SUBSECTIONS B.S.a AND B.4.a AND FLOOD PROTECTION IS MET THROUGH / 3
/r / y - �� / EARTHEN
,A a
1 �C 9VAC25-870-66, SUBSECTIONS C.2.a AND C.3.a. THE FLOWS USED IN THESE ANALYSES WERE TAKEN FROM THE
/ t 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.
--- �j 0 / o LLJ
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I / / I\ � i `� 6D32 = / \ I / \ / / // / /
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V / / /REPAIR'& REPLACE AS /
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_ - - - _ _ - / / 7,SIPAT R,/C - -RAP Q
/ W z y
RK 746.96 - - -
_ _ (TOP MANHOLE) - / 2' W IL TER FABRIC
/ W J
/ U 21 & L J LL
# THE CONTRACTOR SHALL D THE TEMPORARY SEDTMEN / T 'i 3 , J
YM T, W
BASIN UTILIZING AEILTE BAG.ONCE DRAD, THE / %- a
/ / CONTRAC ORSFALL VER11 TH NSTRUCTION / / > ^ o
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15 \ / q�PROVED i5 HOPE CUTF (1�-6g ). HE p� / / �8� / ' EXISTING LLJ
CONTRACTOR SHALL N H OzryHDPE RISER /IY /� \ / / TRAIL WAY - Uj g
STRUCTURETO E P RVEfRKiEIN_ET T6� /+\ / �
x" � / �� / / LOCATED AT A IN's LO OINT. THE CONTRACTOR / //FB LLI
SHALL THEE
EST TH ATIONSAS EEDEDTO / i // // I\ (� °
EN$GREP TIV TOPES TO TH NEWLY INS ALLED LET / - ~ v
_ / TO O�ITRACTOR SHALL --THE SLY PER"rAkr' ENT / / / , R / // < o
_ STA IL TION MEASUREI'TO THE ARREN S ILS & EN RE /
f'� ` n/
IP/ APLINED�ANNELOUTFA LHAS-BEENIN= / / / �� <
J / � � PER THE APPROVE ANS. � � \ � � � Q
F-1 c
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STING�AR. �✓lDT / / / / U o
/ / / , I TIE-IN TO t
� /GRADIN/G & D AINAGE / / / % EXISTING r Q W
RIPRAP DI CH x
4
S TRAILWAY
/ \ / D=1� / PROPOSED Y Q o
17 / / / /'/ // / \ TRAIL WAY LU T
o \ \ ��� \ 3' / / E
, \ \ �i BASIN's BARREL SHALL 0 TFRLL INTO
/ / / / 0 ~� o
~� \\\ PROPOSED VDOT STD. EC- 1, CL. 11, l /, Ul ^ � O 0
21 \ BENTS MA K \ j TYPE A RIP -RAP CHANNEL w/.. " /� / / / - / \, OO � LL
> �` \ e✓ OP 0 BO -73 GEOTEXTILE FABRIC NDERLAYMENT / ,/ , / / / / / / W w Ir w
CHANNEL
SHALL
PROPOSED NDT RIPRAP q 1 ' 1 O / / OO w U% z
\ \ \`,t\
CHANNEL SHALL EXTEND 70 EXISTINNSt/ Q
\\� / BANK OF LICKI GHOLE CREEK // / - �- / '/� O
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/� ELEV. o
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"LICKINGH9L CREEK REPRESENT WHERE THE SITE's Lu
o0 00 / / @/ CONTRIBUTING
CHANNELsNCONTRIBUTIAREA/IS
NGAPPROXIMADRAINAGE AREA�
° CL
z LEASESEETHIS AMENDMENT`sSWMCALCULATIONS PACKE� JOB NO. ate,
o o / / FOR CONFIRMATPNTHA�T THE MS-19 X-SECTIO °
CONTINUES TO BF ADEQUATE\FOR STORMWATER QUANTI`� O O� 112068
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BASIN's BARREL SHALL OUTFACE lN. EXISTING�A WIDTH / O o
PROPOSED VOOT STD. EC-1, CL. ll, -� �� o / / RASING & DRAINAGE / O AS SHOWN °
TYPE A RIP -RAP CHANNEL w/ �� A �� ' 0 9� / o o ° �/ // / O / ESMT. / / /
GEOTEXTILE FABRIC UNDERLAYMENT \`\ o o ° / SCALE: / / / PROPOS D SW � /SHEET NO.
(9'Wx8O'Lx2'D). PROPOSED RIPR ! o o a , / / / //
CHANNEL SHALL EXTEND TO ISTING / o o n� W r �i EAS MEN / / O° SWM-1
BANK OF LICKINGHOLE CR//� //� / 0 0 o e 1 -100 �� / / / EXPANSION l --_ i OO