SW4160401_APPROVED PLANS_20160511

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE
❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

Storm Chart (10 Yr. Event)
Line ID
Length
Incr
Total
Runoff
Incr
Total
Inlet
Tc
Rain
Total
Addrel
Total
Capac.
Veloc
Pipe
Pipe
Inv Elev
Inv Elev
HGL Elev
HGL ElevITC/Rim
El
TC/Rim El
Line ID
Area
Area
Coeff
CxA
CxA
Time
Syst
(I)
Runoff
Q
Flow
Full
Size
Slope
;p
Dn
Up
Dn
Up
Dn
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/hr)
(cfs)
(cfs)
(cfs)
(cfs)
ift/s)
(in)
N
(it)
(ft)
(ft)
(ft)
(ft)
(ft)
DI #101 >> EX. DI #100
38
0.10
0.81
0.85
0.09
0.69
5
6.8
6.4
4.43
0
4.46
3.56
5.68
12
1.00
77>,.38
778.00
779.60
779.00
784.75
782.75
DI #101 >> EX. DI #100
Cl #102 >> DI #101
200
0.31
0.71
0.85
0.26
0.60
5
6.0
6.7
4.02
0
4.02
6.46
5.15
15
1.00
78 L76
780.76
783.56
781.48
788.64
784.75
Cl #102 >> DI #101
CI #103 >> CI #102
115
0.12
0.40
0.85
0.10
1 0.34
1 5
5.4
1 6.9
2.33
0
2.33
6.46
2.90
15
1.00
78•'.01
782.86
784.62
784.11
788.26
788.64
Cl #103 >> Cl #102
Cl #104 >> Cl #103
37
0.12
0.28
0.85
0.10 1
0.24
1 5
5.1
1 6.9
1.65
0
1.65
6.46
2.63
15
1.00
784.48
794.11
785.00
784.98
788.46
788.26
Cl #104 >> Cl #103
CI #105 >> CI #104
15
0.16
0.16
0.85
0.14 1
0.14
1 5
5.0
1 7.0
1 0.95
0
0.95
1 6.46
1.99
15
1.00
784.73
1 784.58
785.18
785.20
788.23
1 788.46
Cl #105 >> Cl #104
N �»� ■ ri \ylr
■��� N 8810'36 E 180.110' BEGIN SHEET FLOW
/71
G SS DRIVE FLOW LENGTH = 100 FT ® y T H1Ga ROCK CURcl! of LEXINGTON NC
B EXIST INCH AG E - -:'- - - - - -- - - - - - - - - - - WATERCOURSE SLOPE = IBO% =-_ _ \ \ SS \ \ / / (/ J1. J� ZONING:B \
843
LEXINGTON DEVELOPMENT CO. LLC I ' -a _ _ _ - - - - - - \ tidy\ TAX P.IN- 05 �24-04-64-3848 \�
ZONING:B
DB ,L 612 PG. 65 END SHEET FLOW Zt \
TAX P.IN 6124-02-65-1144 I Itn T24' NON-EXCLUSIVE ACCESS BEGIN SHALLOW CONCENTRATED FLOW DELTA 44 2b.228' ss\
EASEMENT FOR INGRESS, FLOW LENGTH = 260 FT /
EGRESS AND REGRESS CHORD 53b10'
WATERCOURSE SLOPE = 150
REF. PB 31, FYs. 59 90
PROPOSED
MODULAR BLOCK
RETAINING WALL
LINER SHALL EXTEND UP
FACE OF MODULAR BLOCK
WALL. SECURE WITH BUTYL
SEALANT
IMPERMEABLE SYNTHETIC LINER
FOR ENTIRE LIMITS OF CLASS B
RIP RAP FOREBAY (INCLUDING
SIDES). ALL SEAMS SHALL BE -�
SEALED WITH SEAMING TAPE, AND
ALL PENETRATIONS SHALL BE
SEALED WITH BUTYL SEALANT.
18' THICK SAND BASE LAYER SAND SHALL BE LEXINGTON DEVELOPMENT CO. LLC
�
'`,SHED, COURSE MASONRY RAISE EXISTING ZONING:B \\ % / y/
SAND FILTER DROP INLET TO DB 2040, . 1106 S
SAND ANO C33. (WOV STORTAX P.IN. 6124-02-65-1144 AGE) 152.15 PIG�
\ \ \
4' SCH 40 GLEAUT \� ) App>a.,c. ; 1sacaments
STACKS W/ CAP PROPOSED TOP \ / / POST -DEVELOPED AREA 2 Construc;*r a30 P,)'_uments is
(TYP OF 10) OF DAM 184.00 �" ,.. N 4049'44' E \ S Qi N)IM
DRAINAGE AREA = 0.44 AG required by 5 .. NcrLh Cai�llna
10 YR. ELEV=18254 182.15 �F// �/� %/�/�/ 12210' \' - / PERVIOUS SURFACE = 0.3'3AG rulers reawr� st -rsystern de6lgner
SFNOREBAYR I YR ELEV=181.46 /%�%%�//7//�� I IssVand ng w� u ': : ry cvnfor�My wrfh {tu
/\/%//■ .,. OPEN AREA = 0.05 AG p specs,n .:: iwica with the
(WOV STORACsE)/�/� //�/�, '� S stormwater rule., ('St. .';.., __N i"8 ••t a ' w SC�\ 4 Permit OF 2 SIA)
l QAQi Cate(jj 14
/ SDP/ Sp/� i \�\\NC trvlsion of Water Quality
PERM. PONDED DEPTH �? ry'� \ G� S \ \� \ \ \\\\ /Ci / Slroet # C- S _Revision Date �6
p
• ` -_--- ' 11smm _ Ex. 10 LF OF 24' RCP
SLOPE ® 150% �0 ^V
INV 11S.00 \19
---------------9980m ------ 4' DIA. PERF. PVC
UNDERDRAIN T�<
PERMEABLE NON -WOVEN 4' PERF. SCH 40 PIPING SECTION A• A' �� GROUT SOLID UP TO
FILTER FABRIC LINER UNDERDRAINS (5 O.G.)
ABOVE AND BELOW SLOPE a 0.50% W/ 1'-0'
UNDERDRAINS 451 STONE ENCASEMENT.
SEASONAL HIGH WATER TABLE BELOW ELEV. 112 FT Q
1/4' STEEL PLATE. SECURE TO INSIDE WALL OF OUTLET
STRUCTURE WITH EXPANSION ANCHORS, AND SEALANT.
PLATE TO HAVE 2' DIA. ORIFICE CUT IN AT THE
UNDERDRAIN INVERT ELE-A,,
Open Surface Sand Filter Detail nts
Stormwater Legend:
Sand Filter Underdrain Schedule
A
21 LF OF 4' PERF. PVC PIPE o 0.50% SLOPE (MAX.)
B
21 LF OF 4' PERF. PVC PIPE a 0.50% SLOPE (MAX.)
C
23 LF OF 4' PERF. PVC PIPE e OSO% SLOPE (MAX.)
(3) 4' CLEANOUTS TOTAL INCL. CLEANOUT WYE
INDERDRAIN
ORIFICE
DETAIL
[♦
DRAINAGE DELINEATION LINE
SOILS DELINEATION LINE
-�
-�
EXISTING TIME OF CONCENTRATION TRAVEL PATH
IMPERVIOUS SURFACE TO SAND FILTER
FESCUE SOD W/ t4SP
BASE (NO CLAYS,
2 INCH TOP801L
LAYER FILTER FABRIC
SEE DETAIL
FROM M02 �.
\ 180.16
- --
lC
SEE DETAIL
FILTER FABRIC PERFORATED PiPE/cRAvEl-
tY-LY
"Y-�sY LY LY �aY, oY.y�AtLaYt�.+,,aY'
SEE
»z-�.3�, ���� --UNDERDRAIN
DETAIL SEE DETAIL
i• Surface for Sand Filter Detail
DI 0101 T RIM 184.15
INV OUT 180b6
1bIB3
14 LF OF 8' SCH A
2'
40 PVG a 1.14 0
180.33
TO SAND FILTER
-�_.
FOREBAY
INVERT ELEVATION
1801b6 ON UPSTREAM
SIDE OF WEIR WALL
8' SCH 40 PVC
TO SAND FILTER
a 5,
ill
a
Qe�
21.
-
PRE -DEVELOPED
TOTAL EX. IMPERVIOUS SURFACE = 0.39 AC
EX. IM'ERVIOUS SURFACE TO BE DEMO'ED/REPLACED = 025 AC
EX. IMPERVIOUS SURFACE TO REMAIN = 0.14 AC
POST -DEVELOPED
TOTAL PROP. IMPERVIOUS SURFACE = IA4 AC
PROP. IMPERVIOUS SURFACE TREATED = 1.05 At -
EX IMPERVIOUS SURFACE DEMO'ED/REPLACED = 025 At -
EX. IMPERVIOUS SURFACE TO REMAIN = 0.14 AC
A NOTE: 2' OUTLET PIPE SHALL BE
1 BLXKED OFF UNTIL FLOW
1 Ir SPLI-TER BOX/ SAND FILTER
coNVERSION
h
° - •0 12' SCH 40 PVC
TO EXISTING
i.. TO EXISTING DROP INLET
DROP INLET
- STRUCTURE CMU WEIR WALL
I'-4' SECTION CREST ELEV. 181.83
GROUT SOLID UP TO 2'-0' SECTION CREST ELEV. 180.83
INVERT ELEVATION INV OUT 1'1838
180b6 ON UPSTREAM 38 LF OF 12' SCH
SIDE OF WEIR WALL 40 PVC a 1.009.
Flow Splitter Box DI 0101 (5'x5') nits
"BEFORE YOU DIG" LINE
1-aOO-632-4949 OR 8-1-1
0 20' 40' 60'
NORTH SCALE: I" = 20'
t�\t1CARO
t I f, 11 fII
*I C-3999*"
In C„tl
tt„i,,,
SEAL r:
026966 -
tW
NH
hrt,",v�•
Cw
QL
`�
X
®II
Date: 26th February 2016
For Permitting / Review
Revisions:
4/1/16
909. CD SET
4/11/16
For Permit/Review
Drawn sy M.K
Checked Ey CsSM
Project •
Sheet Title
POST DEVELOPED
STORMJATER PLAN
Sheet C = 5 of 9

1
�I
I
30'ELECTRIC UTILITY E JENT
REF. PB 31, PG. S
24' NON-EXCLUSIVE ACCESS
EASEMENT FOR INCsWSS,
EGRESS AND REGRESS
REF. PB 31, PG. SS
I
'
I
I
I
�
IW
fl I }
II I Q al
III'
I IN
IIw
lv
IIQ
II
t!I'�
X
it
EX.55MH
it
II
RIM 7W34'
INV. OUT 7823'
r
—
-
II
N
� I
LEXINGTON DEVELOPMENT CO.LLC
XONING:15
DB 2~, PG. 1106
TAX P.IR 6124-02-65-1144
I
I
I
5
a
u
PRE -DEVELOPED
TOTAL EX IMPERVIOUS SURFACE - 039 AC
�A�i \ \ FLOW LENGTH = 130 FT.
d� 0�� �� �,S \ �� \\\ WATERCOURSE SLOPE 2.09.
\`
01
EX. IMPERVIOUS SURFACE TO 5E DEMO'ED/REPLACED = 0.25 AG
EX. IMPERVIOUS SURFACE TO REMAIN = 0.14 AG ^�� ���E x
POST -DEVELOPED ary���
TOTAL PROP. IMPERVIOUS SURFACE = 1.44 AC
PROP. IMPERVIOUS SURFACE TREATED = 1.05 AC
EX. IMPERVIOUS SURFACE DEMO'ED/REPLACED = 025 AC EX sSMN
EX. IMPERVIOUS SURFACE TO REMAIN 0.14 AG / / / \� \ RIM 7
06
lINV.OUTUT 77 778.4'
r�.
/ SS
/
S
NOTE: THERE ARE NO WETLANDS LOCATED ON THIS SITE
/
II-If—CFV'IVU.7 ou1THL_r_ = W_/r0 faL.
OPEN AREA = WE, AC
Aptcrovad wtonnw: ,,,> t'arrrliY Documents
Construction in _-::ion:.:::+C:c w... .:;ure dacumsnts is
required by the t.:dodh CarrHlne
rules reouife lhdt ,a I f N - = system designer
Inspect 'u Ir.g Cor. C z.:�ry ccxifornity witlt rie
plans and spec 1hd L--rr 4anca with the
stormwater rile 1?5Nr� �H 1^^8Q))
Permit #.SWA_1j(o040_I__ Date S .1i .1.0I
by 1-4 AlA N D4 ri IJC Division of Wstar QL&pW
Sheet # !�-4_ Revision Date q. Il. t/_
• i I.
Stormater Legend:
■ i ■ W ■ ■ 1
DRAINAGE DELINEATION LINE
M N FM
SOILS DELINEATION LINE
�— {� >
!ll���
EXISTING TIME OF CONCENTRATION TRAVEL PATH
EXISTING IMPERVIOUS SURFACE (ASPHALT)
I
7
'BEFORE YOU DIG' LINE
I-aOO-632-41349 OR 8-1-1
* W C-3999 M: .
••yr1,
sstssslr
ZitAL =
026966
H.
'pnn„s„t
Ci
Z
OL
X
Lu
Date: 26th February 2016
For Permitting / Review
Revisions:
4/1/16
W% CD SET
4/11/16
For Permit/Review
Drawn 5y MW
Checked Ey GSM
Project •
Sheet Title
PRE DEVELOPED
STORMJATER PLAN
NORTH
0 20' 40' (00,
SCALE: 1' = 20'
Sheet G = 4 of 9