SW3201201_Plan (SCM Detail)_20210317

PERFORATION SQ-IIE UL,E
,FOR, ''QUMROMIN PIP
114,u nib& d U r �rA rn Raws Reequ ilr 5
1
(Maxi rn m Spacing_" ,t,D Ft)
Tate,l Length U dardrai In
118
Ft
Number,of Ubderdrain F'e ,yeti ns _
'15,15
Ides
50 % of F°edwadons _
Ffniss
Agee 0rR, F f eti n•n _
.00,0' 77
Ft*
Capacitv d0m, Role; =
0 . t10 55
Ft�' ec
TbtsICapsciblof Peffixadans _
1.5
Ft",n' ec
Ili°
DETENTMI STRUCTUREi
0 1
M,kkFW*?,1JW n
\ I I I I I I
I I I I I I I I
I I I I
I I I I I
II IIII 'I
I I I I I I I
DCO - (448;
I
RIM:534.00
I I 6" INV. OUT: 532.1 (SDCO - (44
I II
I
32.13 LF OF 6" P RF PVC @ .5 /o
I 11 1 SD (449)
RIM:534.00.00
6" INV. IN: 531.98 (SDCO - (448))
CD 1 I 1 1 I 6" INV. OUT: 531.98 (RISER-1)
� I I
45.04 LF OF E" PER PVC @ 0.
Q /
RISER-1
RIM: 537.35
6" INV. IN: 531.75 (SDCO - (449))
24" INV. OUT: 531.75 (SDMH - (427)]
\
\
\ 533
\ \ Off= O
PROP. RIP RAP
21.13 LFOF24" RCP @0.50
FES - (420)
550
545
540
EME
PROP.
535
530
525
�+wil
BMP SAND FILTER
PLAN VIEW
HORIZONTAL SCALE: 1" = 20' i
,.,.,.,.,.. 534
535
\
............. \ ,......., , ,..., 535
PROFILE-BMP
SCALE: 1"=40' H & 1"=4'V
0+00 0+50 1+00 1+50 2+00
550
545
M15I%
MO&7
530
525
Mwel
1 " = 20' 1&
0 10 20 40
OVERALL SITE BUA SUMMARY:
SITE: 33.44 AC
PARCEL: 09057010
EXISTING IMPERVIOUS
ASPHALT =
131,249 SF
= 3.013 AC
CONCRETE =
41,061 SF
= 0.943 AC
GRAVEL =
10,209 SF
= 0.234 AC
BUILDINGS =
92,561 SF
= 2.125 AC
TOTAL =
275,080 SF
= 6.315 AC
EXISTING IMPERVIOUS TO BE REMOVED:
TOTAL =
31,102 SF
= 0.714 AC
PROPOSED IMPERVIOUS:
ASPHALT =
152,910 SF
= 3.510 AC
CONCRETE =
22,780 SF
= 0.523 AC
BUILDINGS =
36, 513 SF
= 0.838 AC
TOTAL =
212,094 SF
= 4.871 AC
1r.11r1I&9rr:1:111_B:�lb11IM0XAG=R:1/A8lox, rf►xT.
INCREASED BUA FOR THIS DEVELOPMENT
= 4.871 AC - 0.714 AC
= 4.157 AC
NOTE: BUA AS -BUILT SHALL BE PROVIDED PRIOR TO THE
ISSUANCE OF BMP AS -BUILT APPROVAL
SAND FILTER BMP BUA SUMMARY CHART
ROADS/PARKING
123,289 SF
SIDEWALK/CONCRETE
21,280 SF
BUILDINGS
36,513 SF
DRAINAGE AREA
6.86 AC
SAND FILTER MAX
ALLOWABLE BUA
181,082 SF = 4.157 AC (60.6 %)
ABOVE GROUND SAND FILTER BMP SUMMARY CHART
PEAK CONTROL
PRE -DEVELOPMENT
POST -DEVELOPMENT POST -ROUTING
STORM EVENTS
RUNOFF (CFS)
RUNOFF (CFS) RUNOFF (CFS)
ELEVATION
TOP OF DAM
539.00
25Y R - 24 H R
30.66
58.11 29.57
537.90
10 YR - 24 HR
23.42
47.31 11.97
537.53
2YR - 24HR
12.24
29.64 5.37
536.32
1 IN - 6HR
0.20
8.82 0.17
534.88
BOTTOM OF BASIN
534.00
SAND FILTER MAX ALLOWABLE BUA (INCREASED BUA)
4.157 AC = 181,082 SF
0
0
s00,�
BMP RISER SCHEMATIC
NTS
io a
o
CKEECH 0AS.30CIATES
1000 W. Morehead St.
Suite 120
Charlotte, NC 28208
p 704.376.6000
www.creech-design.com
THESE DOCUMENTS PROVIDED BY CREECH & ASSOCIATES, PA ARE SUBJECT TO
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LandDeq,m.
223 NORTH GRAHAM STREET
CHARLOTTE, NC 28202
704.333.0325
WWW.LANDDESIGN.COM
NC ENG. FIRM LICENSE # C-0658
C-0653
SEAL J,�,
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Project Number: ,6
Date: 01 /18/2020
01LTA I,WONr_1II
C3-05