SW4220201_Design Calculations_20220926

LaBeLLa
Powered by partnership.
September `, 2022
Hanes Lake- Phase 2 -Stormwater Calculations
Table of Contents:
1. Stormwater Control Measures (SCM) 1-5
2. Vegetated Channel Calculations
3. Energy Dissipators
Respectfully submitted,
�.�x�I 4111J1/r,,`r
0 ff
LABELLA .¢
e .Q� r _
22052
9 ��� y��� � 1 r r i i i bit � �j ��CG'f� ���N'!Gr✓
Paul A. Stimpson, PE
Regional Civil Leader/Office Manager
C#0430 Firm number
939 Burke Street, Suite H I Winston-Salem, NC 271011 p [phone]
www.LabeLLapc.com

///ADS,..
Project Name: Hanes Lake Phase 2
Location: Winston-Salem, NC
Site Designation: SCM-1
SITE CONDITIONS
Rainfall Depth
Impervious Acreage
Total Acreage
Time of Concentration
I
R,(Runoff Coefficient)
W Q'
75% WQv (Treatment Volume)
q„ (Unit Peak Discharge)
QP(Water Quality Storm)
VOLUME BASED SIZING
Volume per cartridge
Cartridge Type
Min. Number of cartridge required
Cartridge Flow rate
System Flow Rate
Release time
SEDIMENT BASED SIZING
Influent Concentration
Annual Rainfall (P)
Annual Sediment Load
Pretreatment reduction
Sediment Load to BayFilter
85% Capture Capacity
Cartridge Type
Sediment load per cartridge
Min. Number of cartridge required
Anticipated Maintenance Cycle
FINAL DESIGN
Cartridge Type
Number of Cartridges
Precast Size
1
2.34
5.83
6
in
ac
ac
min
40.1
%
0.41
8703
cf ✓
6527
cf
1000
csm/in
3.75
cfs
1250
CF
522
6
11.25
gpm
0.15
cfs
12.1
hours
70
45
1536
30%
1075
914
522
131
7
1.00
522
7
6'x14'
approx outlet orifice 2.67 in
mg/L
in
Ibs
Ibs
Ibs
Ibs
From Type II Chart
(0.25 gpm/SF)
Date 8/31/2022
years (must be greater than 1 year)

Project:
Hanes Lake Phase 2: SCM1 & BF-1
StvrmTech-
Chamber
Model -
Mtir3500
Units-
Imperial
pk4ficv Fn AieK
jlft�siu� MUM
uw�-
Number of Chambers -
79
Number of End Caps -
14
Voids in the stone (porosity) -
40
Base of Stone Elevation -
795.86
fo 1[1rrdUda
Pelts 5A� in smmarwra
Amount of Stone Above Chambers -
12
in
Amount of Stone Below Chambers -
9
in
Amount of Stone Between Chambers •
6
in
Area of system -
1
4757
sr Min. Area -
4144 sf min area
Heightol
iniaterritintalSfrialel
Intfernerr7al
Inilramerr
lncre ntal
fncremenlal
IncremsntafCh, Cumu-Bve
System
Chamber
Slrigle End Gap
Chambers
Ertl Cap
Stone
EC andSlona
System
Elevation
(inches)
[cubic 1 ery
(cu6k (eet)
(cubic real)
1-bic foeti
fcubk.16wJ
rcu6&- MCI)
(cubic feet)
(real}
66
0.00
0.00
0.00
0.00
158.90
15890
15824.53
80236
65
0.00
000
0.00
0.00
158.90
158.90
15665.63
802.28
64
0.00
0.00
0.00
000
158.90
158.90
15506.73
80219
63
0.00
000
000
000
158.90
158.90
15347.83
802.11
62
0.00
0.00
0.00
0.00
158.90
158.90
15188.93
802.03
61
000
0.00
0.00
0.00
158.90
158,90
15030.03
801.94
60
0.00
0.00
0.00
0.00
158.90
158.90
14871.13
801.86
59
0.00
0.00
0.00
000
15890
158.90
14712.23
801.78
58
000
0.00
0.00
0.00
158.90
158.90
1455333
801.69
57
0.00
0.00
000
0.00
158.90
158.90
1439443
801 61
56
0.00
0.00
0.00
0.00
158.90
158.90
14235.53
80153
55
0.00
0,00
0.00
0.00
15890
158.90
1407663
801.44
54
0.06
0.00
4.59
0.00
16706
161 65
13917.73
801.36
53
0.19
0.02
15.33
0.33
152.63
16830
13756.07
801.28
52
0.29
0.04
23.22
0.53
149.40
173.15
1358777
801.19
51
0.40
0.05
31.89
0.72
145.66
178.47
1341462
801.11
50
0.69
0.07
54.29
0.95
136.81
192.04
13236.16
801.03
49
1.03
0.09
81.24
1.24
125.91
208.38
13044.12
800.94
48
1.25
0.11
98.71
1.50
118.81
219.03
12835.74
800.86
47
1.42
0.13
112.36
1.77
113.25
227.38
1261671
800.78
46
1.57
0.14
124.28
2.02
10838
234.68
12389.33
80069
45
1.71
0.16
134.67
2,28
104.04
241.19
12154.65
80061
44
1.83
018
144.45
2.54
100.10
247.10
1191347
800.53
43
1.94
020
153.08
281
96.54
252.43
11666 37
800.44
42
2.04
0.22
161.23
3.06
93.19
257.47
11413.93
80036
41
2A 3
0.23
168.64
329
9013
26206
1115647
800.28
40
2.22
0.25
175.71
3.51
87.21
266.43
10894.41
B00.19
39
2.31
0.27
1 B2.24
3.72
84.52.
270.47
10627.98
800.11
38
2.38
0.28
188.40
3.92
81.97
274.29
1035750
800.03
37
2.46
0.29
194.27
4.12
79,55
277.93
10083.21
79994
36
2.53
0.31
199.73
4.31
7729
281.32
9805.28
79986
35
2.59
032
204.91
4.50
75.14
284.54
9523.96
799.78
34
2.66
0.33
209.83
4.68
73.10
287.61
9239.42
799.69
33
2.72
0.35
214.49
4.86
71.16
290.51
8951.81
79961
32
2.77
0.36
218.93
5.04
6931
293.28
8661.30
799.53
31
2.82
0.37
223.15
521
6756
295.92
8368.02
799.44
30
2.88
038
227.16
5.38
65.88
298.42
8072.10
799.36
29
2.92
0.40
231.01
5.54
64.28
300.83
7773.68
79928
28
2.97
0.41
234.62
5.71
6277
303.10
7472.85
799.19
27
3.01
0.42
237.98
5.86
61.36
305.21
716975
799.11
26
3.05
0.43
241.21
6.02
60.01
307.23
6864.54
799.03
25
3.09
0.44
244.45
6.17
58.65
309.27
655731
706."
24
3.13
0.45
247.31
6.31
57.45
31108
6248.04
798.88
23
3.17
046
250.09
645
56.28
312.82
5936.97
798.7E
22
3.20
0.47
252.76
6.59
55.16
314.51
5624.14
798.69
21
3.23
0.48
255.26
672
5411
316.09
5309.64
798.61
20
3.26
0.49
257.65
6.B5
53.10
317.60
4993.55
798.53
19
3.29
0.50
259.93
6.97
52.14
319.04
4675.95
79844
18
3.32
051
262.12
7.09
51.22
320.43
4356.91
798.36
17
3.34
0.51
264.19
7.20
50.34
321.73
4036.4E
798.28
16
3.37
0.52
266.12
731
4953
322,96
3714.75
798.19
15
3.39
0.53
268.01
7.41
48.73
324.15
3391.79
798.11
14
3.41
0.54
269.75
7.51
48.00
325.26
3067.64
798.03
13
3.44
054
271.52
7.60
47.25
326.38
274238
79794
12
346
0.55
273.16
7.69
46.56
327.41
2416.00
797.86
11
3.48
0.56
274.82
777
45.86
328.45
2088.59
79778
10
3.51
059
276.90
8.33
44.81
33004
1760.14
797.69
9
0.00
0.00
0.00
0.00
158.90
158.90
1430.10
797.61
8
0.00
0.00
0.00
000
158.90
158.90
1271.20
797.53
7
000
0.00
0.00
0.00
15890
158.90
1112.30
797.44
6
0.00
0.0o
0.00
0.00
158.90
158.90
953.40
79736
5
0.00
000
0.00
0.00
158.90
158.90
794.50
797.28
4
0.00
0.00
0.00
0.00
158.90
158.90
635.60
797.19
3
0.00
0.00
0.00
0.00
158.90
158.90
476.70
797.11
2
0.00
0.00
0.00
0.00
158.90
158.90
317.80
797.03
1
0.00
000
0.00
000
158.90
15890
15B.90
79694
WQ Volume: 6524cf
WQ. achieved at eievaijarl 79S 94

BAYSAV E R
TECHNOLOGIES'
BavFilterTM Sizing Form
Project Contact Information
Company Name LaBella & Associates, PC
Date 08/03/22
Contact Name Brandon Sherrill
®Engineer ❑Developer ❑Contractor
Project Name Hanes Lake Phase 2-SCM #1
Email [e-mail]
Telephone [phone]
Fax
City Winston-Salem
State NC Zip 27101
Site Characteristics Due Date
Residential ❑Commercial 01ndustrial ❑Mixed
Additional comments/project information
Design and Sizing Parameters
Total Drainage Area (acres) 5.83 ""
I Impervious Area acres 2.34
Required Treatment Flow CFS (if applicable)
Water Quality Volume to be Detained
75% 100% Other
Water Quality Volume ft3 6524
FProject Location: City Winston-Salem ST NC
Regulatory Re uirements
% Total Suspended Solids Removal
ex. 80% Meet NCDEQ Standards I
% Total Phosphorus Removal (ex. 50%)
Meet NCDEQ Standards
Project Stage ElConceptual Design ❑Preliminary Design MFinal Design Other
Other Site Specific Sizing Criteria
The System Pretreatment Credit shall be 30% if system includes a minimum sediment
sump with minimum dimensions of 4' diameter by 2' deep.
Thank you for supplying the required information! You're almost done!
We will also need:
Plan(s) View
Profile(s)
LVl A I U V V I J lift
Please email this form and any drawings to [e-mail]
Phone 800-BAYSAVER (800.229.7283) Fax [phone]

PROJECT C:S 1� L { -r S� Z SHEET l OF Z
Be PROJECT NO. Z� Zo 5 CALC. BY GciS DATELaRa
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CHECKED BY
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P05r- I)tvu-u)em.&Sur
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= 22zq f c-F

PROJECT
LaBeRa PROJECT NO.
Powered by partnership, SUBJECT_
CHECKED BY
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ZZZigt CF- 657Zel cFc:F
5CM 41
-� MG-3sor� cl�•K�c�-�>_s
SHEET Z OF Z
CALL. BY DATE
SCALE _

Hanes Lake Phase 2
scm #1
0
PRE -DEVELOPMENT POST-DEV LOPMENT
.47
/3\
oSubr-at Reach on Link

2212045 SCM1 Calculation_083122 Table of Contents
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 I-iv(jroCAD Software Solutions LLC
TABLE OF CONTENTS
Promect Rel2orts
1 Routing Diagram
2 Rainfall Events Listing (selected events)
3 Area Listing (all nodes)
4 Soil Listing (all nodes)
5 Ground Covers (all nodes)
6 Pipe Listing (all nodes)
1-yr Event
7 Node Listing
8 Subcat 1: PRE -DEVELOPMENT
9 Subcat 2: POST -DEVELOPMENT
10 Pond 3: SCM #1
10-yr Event
15 Node Listing
16 Subcat 1: PRE -DEVELOPMENT
17 Subcat 2: POST -DEVELOPMENT
18 Pond 3: SCM #1

2212045 SCM1 Calculation 083122
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 2
Rainfall Events Listing (selected events)
Event# Event Storm Type Curve Mode Duration B/B Depth AMC
Name (hours) (inches)
1 1-yr Type II 24-hr Default 24.00 1 2.80 2
2 10-yr Type II 24-hr Default 24.00 1 4.88 2

2212045 SCM1 Calculation_083122
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Pa e 3
Area Listing (all nodes)
Area CN Description
(acres) (subcatchment-numbers)
5.830 61 >75% Grass cover, Good, HSG B (1)
2.340 98 Paved roads w/curbs & sewers, HSG B (2)

2212045 SCM1 Calculation 083122
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCADO 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Pa e 4
Soil Listing (all nodes)
Area Soil Subcatchment
(acres) Group Numbers
0.000 HSG A
8.170 HSG B 1,2
0.000 HSG C
0.000 HSG D
0.000 Other

2212045 SCM1 Calculation_083122
Prepared by Labella & Associates, PC Printed 9/1 /2022
H droCADO 10.10-4b s/n 09581 © 2020 Hvdrr)CAD Software Solulions LLC Paae 5
Ground Covers (all nodes)
HSG-A
HSG-B
HSG-C
HSG-D Other Total
Ground
Subcatchme
(acres)
(acres)
(acres)
(acres) (acres) (acres)
Cover
Numbers
0.000
5.830
0.000
0.000 0.000 5.830
>75% Grass cover, Good
1
0.000
2.340
0.000
0.000 0.000 2.340
Paved roads w/curbs & sewers
2

2212045 SCM1 Calculation 083122
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 6
Pipe Listing (all nodes)
Line# Node In -Invert Out -Invert Length Slope n Width Diam/Height Inside -Fill
Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches)
1 3 795.19 794.69 49.9 0.0100 0.013 0.0 15.0 0.0

2212045 SCM1 Calculation_083122 Type H 24-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCADC7 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 7
Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchment1: PRE -DEVELOPMENT Runoff Area=5.830 ac 0.00% Impervious Runoff Depth>0.25"
Flow Length=687' Tc=11.6 min CN=61 Runoff=1.39 cfs 0.119 of
Subcatchment2: POST -DEVELOPMENT Runoff Area=2.340 ac 100.00% Impervious Runoff Depth>2.38"
Tc=6.0 min CN=98 Runoff=8.97 cfs 0.465 of
Pond 3: SCM #1 Peak Elev=798.91' Storage=13,397 cf Inflow=8.97 cfs 0.465 of
Outflow=0.27 cfs 0.212 of

2212045 SCM1 Calculation_083122 Type 1124-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Page 8
Summary for Subcatchment 1: PRE -DEVELOPMENT
Runoff = 1.39 cfs @ 12.08 hrs, Volume= 0.119 af, Depth> 0.25"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.80"
Area (ac) CN Description
5.830 61 >75% Grass cover. Good. HSG B
5.830 100.00% Pervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
feel)
(ft/ft)
(ft/sec)
(cfs)
9.3
100
0.0546
0.18
Sheet Flow, Sheet Flow
Grass: Dense n= 0.240 P2= 3.41"
2.3
587
0.0796
4.23
Shallow Concentrated Flow, Shallow Concentrated
Grassed Wateruvav Kv= 15.0 fps
11.6 687 Total
N
3
0
U_
Subcatchment 1: PRE -DEVELOPMENT
Hydrograph
Type 11 24-hr
1-yr Rainfall=2.80"
Runoff Area=5.830 ac
Runoff Volume=0.119 of
Runoff Depth>0.25"
Flow Length=687'
Tc=11.6 min
CN=61
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)
-1 Runoff

2212045 SCM1 Calculation_083122 Type 11 24-hr 1-yr Rainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCADO 10.10-4b s/n 09581 © 2020 HydroCAD Software Solutions LLC Page 9
Summary for Subcatchment 2: POST -DEVELOPMENT
Runoff = 8.97 cfs @ 11.96 hrs, Volume= 0.465 af, Depth> 2.38"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.80"
Area (ac) CN Description
2.340 98 Paved roads w/curbs & sewers. HSG B
2.340 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) feet ft/ft) (ft/sec) cfs)
6.0 Direct Entry,
Subcatchment 2: POST -DEVELOPMENT
Hydrograph
t0 f - Runoff
a j Type II 24-hr
s 1-yr Rainfall=2.80"
7 Runoff Area=2.340 ac
Runoff Volume=0.465 of
�. Runoff Depth>2.38"
3 5
Tc=6.0 m i n
LL
4 r 'r►L1—nn
2
1
o■
5
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

2212045 SCM1 Calculation_083122 Type 1124-hr 1-yr Rainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HydroCA❑ Software Solutions LLC Pa e 10
Summary for Pond 3: SCM #1
Inflow Area = 2.340 ac,100.00% Impervious, Inflow Depth > 2.38" for 1-yr event
Inflow = 8.97 cfs @ 11.96 hrs, Volume= 0.465 of
Outflow = 0.27 cfs @ 13.91 hrs, Volume= 0.212 af, Atten= 97%, Lag= 117.1 min
Primary = 0.27 cfs @ 13.91 hrs, Volume= 0.212 of
Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Peak Elev= 798.91' @ 13.91 hrs Surf.Area= 5,014 sf Storage= 13,397 cf
Plug -Flow detention time= 247.7 min calculated for 0.211 of (45% of inflow)
Center -of -Mass det. time= 153.6 min ( 888.1 - 734.5 )
Volume Invert Avail.Stora a Storage Description
#1 796.94' 15,875 cf Custom Stage DataListed below
#2A 796.86' 6,998 cf 44.25'W x 113.32'L x 5.50'H BASE STONE
27,578 cf Overall - 10,083 cf Embedded = 17,496 cf x 40.0% Voids
#3A 797.61' 10,083 cf ADS _StormTech MC-3500 c +Capx 90 Inside #2
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17'L = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.50'L with 0.33' Overlap
90 Chambers in 6 Rows
Cap Stora e= +15.6 cf x 2 x 6 rows = 187.2 cf
32,956 cf Total Available Storage
Storage Group A created with Chamber Wizard

2212045 SCM1 Calculation_083122 Type 1124-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 11
Elevation Cum.Store
(feet) (cubic -feet)
796.94
0
797.03
319
797.11
479
797.19
639
797.28
798
797.36
958
797.44
1,118
797.53
1,277
797.61
1,437
797.69
1,768
797.78
2,097
797.86
2,425
797.94
2,752
798.03
3,078
798.11
3,403
798.19
3,727
798.28
4,050
798.36
4,371
798.44
4,691
798.53
5,009
798.61
5,326
798.69
5,641
798.78
5,955
798.86
6,266
798.94
6,576
799.03
6,884
799.11
7,190
799.19
7,494
799.28
7,796
799.36
8,095
799.44
8,392
799.53
8,686
799.61
8,977
799.69
9,265
799.78
9,551
799.86
9,833
799.94
10,112
800.03
10,387
800.11
10,658
800.19
10,925
800.28
11,188
800.36
11,446
800.44
11,699
800.53
11,947
800.61
12,189
800.69
12,425
800.78
12,653
800.86
12,873
800.94
13,082
801.03
13,274

2212045 SCM1 Calculation_083122 Type/1 24-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 12
801.11
13,454
801.19
13,628
801.28
13,797
801.36
13,959
801.44
14,119
801.53
14,278
801.61
14,438
801.69
14,598
801.78
14,757
801.86
14,917
801.94
15,077
802.03
15,236
802.11
15,396
802.19
15,556
802.28
15,715
802.36
15,875
Device Routinq Invert Outlet Devices
#1 Primary 795.19' 15.0" Round BF1 TO DMH2 L= 49.9' Ke= 0.250
Inlet / Outlet Invert= 795.19' / 794.69' S= 0.0100'/' Cc= 0.900
n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.23 sf
#2 Device 1 796.86' 2.7" Vert. EQUIVALENT ORIFICE C= 0.600
Limited to weir flow at low heads
#3 Device 1 798.94' 2.5' long x 0.5' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00
Coef. (English) 2.80 2.92 3.08 3.30 3.32
Primary OutFlow Max=0.27 cfs @ 13.91 hrs HW=798.91' (Free Discharge)
I-'-1=BF1 TO DMH2 (Passes 0.27 cfs of 10.92 cfs potential flow)
L2=EQUIVALENT ORIFICE (Orifice Controls 0.27 cfs @ 6.70 fps)
3=13road-Crested Rectangular Weir( Controls 0.00 cfs)

2212045 SCM1 Calculation_083122 Type/1 24-hr 1-yrRainfa11=2.80"
Prepared by Labella & Associates, PC Printed 9/1 /2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HydroCA❑ Software Solutions LLC Pa e 13
Pond 3: SCM #1
Hydrograph
■ Inflow
10 ., Q Primary
9 1 of low Area=2.340 ac
8 Peak Elev=798.91'
7 �,� Storage=13,397 cf
w
3 5
0
LL
4
s
2
1
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

2212045 SCM1 Calculation_083122 Type 1124-hr 1-yrRainfall=2.80"
Prepared by Labelia & Associates, PC Printed 9/1/2022
HvdroCAD®10.10-4b s/n 09581 9)2020 HvdroCAD Software Solutions LLC Page 14
Elevation
Storage
(feet)
(cubic -feed_
796.86
0
796.90
80
796.94
160
796.98
382
797.02
604
797.06
780
797.10
940
797.14
1,101
797.18
1,261
797.22
1,414
797.26
1,565
797.30
1,721
797.34
1,881
797.38
2,041
797.42
2,201
797.46
2,357
797.50
2,508
797.54
2,661
797.58
2,821
797.62
3,026
797.66
3,364
797.70
3,697
797.74
4,016
797.78
4,334
797.82
4,669
797.86
5,005
797.90
5,340
797.94
5,674
797.98
5,989
798.02
6,305
798.06
6,633
798.10
6,965
798.14
7,297
798.18
7,628
798.22
7,945
798.26
8,257
798.30
8,577
798.34
8,906
798.38
9,233
798.42
9,560
798.46
9,878
798.50
10,186
798.54
10,497
798.58
10,822
798.62
11,145
798.66
11,467
798.70
11,785
798.74
12,088
798.78
12,392
798.82
12,710
798.86
13,029
798.90
13,346
Stage -Area -Storage for Pond 3: SCM #1
Elevation
Storage
(feet)
(cubic -feet)_
798.94
13,663
798.98
13,961
799.02
14,258
799.06
14,567
799.10
14,880
799.14
15,191
799.18
15,502
799.22
15,798
799.26
16,090
799.30
16,389
799.34
16,694
799.38
16,999
799.42
17,302
799.46
17,596
799.50
17,880
799.54
18,167
799.58
18,465
799.62
18,762
799.66
19,056
799.70
19,346
799.74
19,622
799.78
19,898
799.82
20,186
799.86
20,474
799.90
20,759
799.94
21,043
799.98
21,309
800.02
21,574
800.06
21,848
800.10
22,125
800.14
22,398
800.18
22,671
800.22
22,929
800.26
23,183
800.30
23,441
800.34
23,704
800.38
23,964
800.42
24,222
800.46
24,471
800.50
24,709
800.54
24,950
800.58
25,196
800.62
25,440
800.66
25,681
800.70
25,915
800.74
26,135
800.78
26,352
800.82
26,576
800.86
26,798
800.90
27,011
800.94
27,220
800.98
27,407
Elevation
(feet)
801.02
801.06
801.10
801.14
801.18
801.22
801.26
801.30
801.34
801.38
801.42
801.46
801.50
801.54
801.58
801.62
801.66
801.70
801.74
801.78
801.82
801.86
801.90
801.94
801.98
802.02
802.06
802.10
802.14
802.18
802.22
802.26
802.30
802.34
Storage
(cubic -feet)
27,589
27,772
27,953
28,130
28,305
28,469
28,629
28,791
28,954
29,115
29,275
29,430
29,581
29,734
29,895
30,055
30,215
30,373
30,524
30,675
30,835
30,995
31,155
31,316
31,467
31,617
31,775
31,936
32,096
32,256
32,409
32,560
32,716
32,876

2212045_SCM1 Calculation_083122 Type 11 24-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HydroCAD Software Solutions LLC Page 15
Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchment1: PRE -DEVELOPMENT Runoff Area=5.830 ac 0.00% Impervious Runoff Depth>1.16"
Flow Length=687' Tc=11.6 min CN=61 Runoff=10.22 cfs 0.562 of
Subcatchment2: POST -DEVELOPMENT Runoff Area=2.340 ac 100.00% Impervious Runoff Depth>4.26"
Tc=6.0 min CN=98 Runoff=15.80 cfs 0.831 of
Pond 3: SCM #1 Peak Elev=799.68' Storage=19,182 cf Inflow=15.80 cfs 0.831 of
Outflow=5.43 cfs 0.533 of

2212045 SCM1 Calculation_083122 Type 1124-hr 10-yr RainfaU=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD& 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Pa e 16
Summary for Subcatchment 1: PRE -DEVELOPMENT
Runoff = 10.22 cfs @ 12.05 hrs, Volume= 0.562 af, Depth> 1.16"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=4.88"
Area ac CN Description
5.830 61 >75% Grass cover. Good. HSG B
5.830 100.00% Pervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(fUsec)
(cfs)
9.3
100
0.0546
0.18
Sheet Flow, Sheet Flow
Grass: Dense n= 0.240 P2= 3.41"
2.3
587
0.0796
4.23
Shallow Concentrated Flow, Shallow Concentrated
Grassed Waterwav Kv= 15.0 fps
11.6 687 Total
11
9
0
LL J
Subcatchment 1: PRE -DEVELOPMENT
Hydrograph
Type 1124-h r
10-yr Rainfall=4.88"
Runoff Area=5.830 ac
Runoff Volume=0.562 of
Runoff Depth>1.16"
Flow Length=687'
Tc=11.6 min
CN=61
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)
='i Runoff

2212045 SCM1 Calculation_083122 Type 11 24-hr 10-yr Rainfali=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCADO 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Page 17
Summary for Subcatchment 2: POST -DEVELOPMENT
Runoff = 15.80 cfs @ 11.96 hrs, Volume= 0.831 af, Depth> 4.26"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=4.88"
Area (ac) CN Description
2.340 98 Paved roads w/curbs & sewers, HSG B
2.340 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) feet ft/ft (fUsec) (cfs)
6.0 Direct Entry,
Subcatchment 2: POST -DEVELOPMENT
u..a..,..—h
17
I.
l
16.
-
15.
I
14'
13
12
11
3
_,
fi
I+
LL
i
s
LA
1
Type 11 24-h r
10-yr Rainfall=4.88"
Runoff Area=2.340 ac
Runoff Volume=0.831 of
Runoff Depth>4.26"
Tc=6.0 min
CN=98
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)
1 n Runoff

2212045 SCM1 Calculation_083122 Type 1124-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 i- NciroCAD Software Solutions LLC Page 18
Summary for Pond 3: SCM #1
Inflow Area = 2.340 ac,100.00% Impervious, Inflow Depth > 4.26" for 10-yr event
Inflow = 15.80 cfs @ 11.96 hrs, Volume= 0.831 of
Outflow = 5.43 cfs @ 12.10 hrs, Volume= 0.533 af, Atten= 66%, Lag= 8.3 min
Primary = 5.43 cfs @ 12.10 hrs, Volume= 0.533 of
Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Peak Elev= 799.68' @ 12.10 hrs Surf.Area= 5,014 sf Storage= 19,182 cf
Plug -Flow detention time=150.7 min calculated for 0.531 of (64% of inflow)
Center -of -Mass det. time= 79.2 min ( 809.4 - 730.2 )
Volume
Invert
Avail.Stora a
Storage Description
#1
796.94'
15,875 cf
Custom Stage DataListed below
#2A
796.86'
6,998 cf
44.25'W x 113.32'L x 5.50'H BASE STONE
27,578 cf Overall - 10,083 cf Embedded = 17,496 cf x 40.0% Voids
#3A
797.61'
10,083 cf
ADS MC-3500 c +Capx 90 Inside #2
_StormTech
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17'L = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.501 with 0.33' Overlap
90 Chambers in 6 Rows
Cap Stora e= +15.6 cf x 2 x 6 rows = 187.2 cf
32,956 cf
Total Available Storage
Storage Group A created with Chamber Wizard

2212045 SCM1 Calculation_083122 Type 1124-hr 90-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroGADV 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 19
Elevation Cum.Store
(feet)
(cubic -feet)
796.94
0
797.03
319
797.11
479
797.19
639
797.28
798
797.36
958
797.44
1,118
797.53
1,277
797.61
1,437
797.69
1,768
797.78
2,097
797.86
2,425
797.94
2,752
798.03
3,078
798.11
3,403
798.19
3,727
798.28
4,050
798.36
4,371
798.44
4,691
798.53
5,009
798.61
5,326
798.69
5,641
798.78
5,955
798.86
6,266
798.94
6,576
799.03
6,884
799.11
7,190
799.19
7,494
799.28
7,796
799.36
8,095
799.44
8,392
799.53
8,686
799.61
8,977
799.69
9,265
799.78
9,551
799.86
9,833
799.94
10,112
800.03
10,387
800.11
10,658
800.19
10,925
800.28
11,188
800.36
11,446
800.44
11,699
800.53
11,947
800.61
12,189
800.69
12,425
800.78
12,653
800.86
12,873
800.94
13,082
801.03
13,274

2212045 SCM1 Calculation_083122 Type 1124-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCADC` 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 20
801.11
13,454
801.19
13,628
801.28
13,797
801.36
13,959
801.44
14,119
801.53
14,278
801.61
14,438
801.69
14,598
801.78
14,757
801.86
14,917
801.94
15,077
802.03
15,236
802.11
15,396
802.19
15,556
802.28
15,715
802.36
15,875
Device Routina Invert Outlet Devices
#1 Primary 795.19' 15.0" Round BF1 TO DMH2 L= 49.9' Ke= 0.250
Inlet / Outlet Invert= 795.19' / 794.69' S= 0.0100'/' Cc= 0.900
n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.23 sf
#2 Device 1 796.86' 2.7" Vert. EQUIVALENT ORIFICE C= 0.600
Limited to weir flow at low heads
#3 Device 1 798.94' 2.5' long x 0.5' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00
Coef. (English) 2.80 2.92 3.08 3.30 3.32
Primary OutFlow Max=5.42 cfs c@ 12.10 hrs HW=799.68' (Free Discharge)
't--1=BF1 TO DMH2 (Passes 5.42 cfs of 12.25 cfs potential flow)
�2=111QUIVALENT
ORIFICE (Orifice Controls 0.31 cfs @a 7.92 fps)
3=Broad-Crested Rectangular Weir (Weir Controls 5.11 cfs @ 2.77 fps)

2212045 SCM1 Calculation_083122 Type // 24-hr 10-yrRainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Pa e 21
Pond 3: SCM #1
Hydrograph
17
16- Inflow Area=2.340 ac
15 Peak Elev=799.68'
13 Storage=19,182 cf
12
i1
w 10=
U
3
0 8-
a
7.
6_ 5aads
1
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)
Inflow
Fj Primary

2212045 SCM1 Calculation_083122 Type 1124-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD®10.10-4b s/n 09581 ©2020 H droCAD Software Solutions LLC Page 22
Elevation
Storage
(feet)
(cubic -feet)
796.86
0
796.90
80
796.94
160
796.98
382
797.02
604
797.06
780
797.10
940
797.14
1,101
797.18
1,261
797.22
1,414
797.26
1,565
797.30
1,721
797.34
1,881
797.38
2,041
797.42
2,201
797.46
2,357
797.50
2,508
797.54
2,661
797.58
2,821
797.62
3,026
797.66
3,364
797.70
3,697
797.74
4,016
797.78
4,334
797.82
4,669
797.86
5,005
797.90
5,340
797.94
5,674
797.98
5,989
798.02
6,305
798.06
6,633
798.10
6,965
798.14
7,297
798.18
7,628
798.22
7,945
798.26
8,257
798.30
8,577
798.34
8,906
798.38
9,233
798.42
9,560
798.46
9,878
798.50
10,186
798.54
10,497
798.58
10,822
798.62
11,145
798.66
11,467
798.70
11,785
798.74
12,088
798.78
12,392
798.82
12,710
798.86
13,029
798.90
13,346
Stage -Area -Storage for Pond 3: SCM #1
Elevation
Storage
(feet)
(cubic -feet)
798.94
13,663
798.98
13,961
799.02
14,258
799.06
14,567
799.10
14,880
799.14
15,191
799.18
15,502
799.22
15,798
799.26
16,090
799.30
16,389
799.34
16,694
799.38
16,999
799.42
17,302
799.46
17,596
799.50
17,880
799.54
18,167
799.58
18,465
799.62
18,762
799.66
19,056
799.70
19,346
799.74
19,622
799.78
19,898
799.82
20,186
799.86
20,474
799.90
20,759
799.94
21,043
799.98
21,309
800.02
21,574
800.06
21,848
800.10
22,125
800.14
22,398
800.18
22,671
800.22
22,929
800.26
23,183
800.30
23,441
800.34
23,704
800.38
23,964
800.42
24,222
800.46
24,471
800.50
24,709
800.54
24,950
800.58
25,196
800.62
25,440
800.66
25,681
800.70
25,915
800.74
26,135
800.78
26,352
800.82
26,576
800.86
26,798
800.90
27,011
800.94
27,220
800.98
27,407
Elevation
feet
801.02
801.06
801.10
801.14
801.18
801.22
801.26
801.30
801.34
801.38
801.42
801.46
801.50
801.54
801.58
801.62
801.66
801.70
801.74
801.78
801.82
801.86
801.90
801.94
801.98
802.02
802.06
802.10
802.14
802.18
802.22
802.26
802.30
802.34
Storage
cubic -feet
27,589
27,772
27,953
28,130
28,305
28,469
28,629
28,791
28,954
29,115
29,275
29,430
29,581
29,734
29,895
30,055
30,215
30,373
30,524
30,675
30,835
30,995
31,155
31,316
31,467
31,617
31,775
31,936
32,096
32,256
32,409
32,560
32,716
32,876

Project Name: Hanes Lakes Phase 2
Location: Winston-Salem. NC
Site Designation: SCM #2
SITE CONDITIONS
Rainfall Depth
Impervious Acreage
Total Acreage
Time of Concentration
I
R,(Runoff Coefficient)
W Q„
75% WQv (Treatment Volume)
qu(Unit Peak Discharge)
QP(Water Quality Storm)
VOLUME BASED SIZING
Volume per cartridge
Cartridge Type
Min. Number of cartridge required
Cartridge Flow rate
System Flow Rate
Release time
SEDIMENT BASED SIZING
Influent Concentration
Annual Rainfall (P)
Annual Sediment Load
Pretreatment reduction
Sediment Load to BayFilter
85% Capture Capacity
Cartridge Type
Sediment load per cartridge
Min. Number of cartridge required
Anticipated Maintenance Cycle
FINAL DESIGN
Cartridge Type
Number of Cartridges
Precast Size
Equivalent Orifice Size
1
1.43
4.11
6
in
ac V
ac ✓
min
34.8
%
0.36
5418
cf ✓
4063
cf
1000
csm/in
2.33
cfs
1250
522
4
11.25
0.10
11.3
70
45
956
30%
669
569
522
131
5
1.15
522
5
6x10
1.72
,*I
gpm
cfs
hours
mg/L
in
Ibs
Ibs
Ibs
Ibs
From Type II Chart
(0.25 gpm/SF)
Date 8/30/2022
years (must be greater than 1 year)
inch

Project: Hanes Lake Phase 2:
SCM 2 & BF2
�
StvrmTech
Chamber Model -
L7C=78tF
Units -
Imp@rial
clop-
�r�-�.
rs uo�= y
Number of chambers-
Voids in the stone (porosity) -
Base of Slone Elevation -
a4O
fl
U Induda Cwimeter Sconem Uwbdwm .
Amount of Stone Above Chambers -
inAmount
of Stone Below Chambers -in
Area of system -
4.451 sf Min Area - 3786 sf min area
F-H!rPhl of
System
Whasj
tnbramenta smgle
Chamber
I (CI161. real)
Incramm-WITutal
Chamber
I [capic rest)
tncfehlertsl
Slone
I (Vuboa feel]
11FICFEMEl"talCh
& 51
[c!bL.19aif
Climulati+M
C1581n17er
(Obiow)
£levalion
I tr-o
45 000
0.00
148.37
148.37
978573
788.81)
44 0-00
000
148.37
148.37
9637-36
78852
43 000
000
148,37
148.37
9489,00
788-43
42 0-00
000
148.37
148.37
9340,63
788-35
41 000
000
148.37
148.37
919226
788.27
40 0.00
000
148.37
148.37
9043.90
788.18
39 0.06
648
145,77
152.26
889553
788-10
38 0.17
18.67
140.90
159.57
8743.27
788-02
37 0.29
32.10
135.53
167.63
858370
787.93
36 0.61
68.44
120.99
189.43
841608
78785
35 0-81
90.76
112.06
202.83
8226.65
787-77
34 0,96
107.41
105.40
212.81
8023.82
787.68
33 1.08
121,29
99.85
221.14
7811.01
787-60
32 1J9
133.02
95.16
228.18
7589.86
787Z2
31 1,27
142,68
91 29
233.98
7361.69
787.43
30 1,36
152.78
87,26
240.03
7127.71
787.35
29 1.45
162.89
83,21
246.10
6887.68
787.27
28 1.53
171-03
79.95
250.98
6641.57
787.18
27 1.59
17820
77X9
25529
6390.59
787.10
26 1-65
184.97
74.38
259.35
6135X
787.02
25 1.71
191.39
71-81
263.20
5875-96
786-93
24 1.76
197.41
69.40
266.81
5612.75
786-85
23 1.81
20306
67-14
270.20
534594
78677
22 1,86
208-35
65-03
273-37
5075.74
786.68
21 1-9D
21331
63,04
276-35
4802-36
786.60
20 1-95
217 97
61.18
279.15
4526.01
7B6 52
19 1.99
222.35
59.43
281.77
4246-86
786.43
18 2.02
226.45
57,79
284.24
3965.09
786.35
17 2,06
230.30
56.25
286.55
3680-85
786.27
16 2.09
23391
54.80
288.71
3394.30
786.18
15 2.12
237,28
53.46
290.73
3105,59
786.10
14 215
240-42
5220
292-62
2814.86
786.02
13 2.17
243.34
51.03
294.37
2522.24
785.93
12 2.20
246.05
49.95
296.00
2227.87
785.85
11 2.22
248.55
48.95
297,50
1931.87
785.77
10 224
251.18
47.90
299,07
1634.37
785.68
9 000
0.00
148.37
148.37
1335.30
785.60
8 0.00
0.00
148.37
148.37
1186-93
785.52
7 000
0.00
148.37
148,37
1038.57
785.43
6 000
0,00
148.37
148.37
89020
785.35
5 000
0-00
148.37
148.37
741-83
78527
4 0.00
0.00
14837
148.37
593-47
78518
3 000
0.00
14837
148.37
445.10
78510
2 000
0,00
14837
148.37
296.73
78502
1 0.00
0.00
14837
148.37
148.37
784.93
W Q Volume: 4063cf
WQv achieved at alevabDn: 786.38

BAYSAVER
TECHNOLOGIES
BavFilterTM Sizin4 Form
Project Contact Information
Company Name LaBella & Associates, PC
Date 9/17/21
Contact Name Brandon Sherrill
®Engineer ❑Developer ❑Contractor
Project Name Hanes Lake Phases 2 & 3
SCM #2
Email [e-mail]
Telephone [phone]
Fax
City Winston-Salem
State NC Zip 27101
Site Characteristics
Residential _❑Commercial ❑Industrial []Mixed
Due Date
Additional comments/project information
Design and Sizing Parameters
Total Drainage Area (acres) 4.11
11mpervious Area (acres) 1.43
Required Treatment Flow CFS (if applicable)
Water Quality Volume to be Detained
®75% ❑ 100% Other
Water Quality Volume (ft3) 4064
1 Project Location: City Winston-Salem ST NC
Regulatory Re uirements
% Total Suspended Solids Removal % Total Phosphorus Removal (ex. 50%)
(ex. 80%) Meet NCDEQ Standards Meet NCDEQ Standards
Protect Stage []Conceptual Desi n ❑11rk:hm1nary Design LJFinal Design []Other
Other Site Specific Sizing Criteria
The System Pretreatment Credit shall be 30% if system includes a minimum sediment
sump with minimum dimensions of 4' diameter by 2' deep.
Thank you for supplying the required information! You're almost done!
We will also need:
Plan(s) View
Profile(s)
M I , l 600 13 AS
Please email this form and any drawings to [e-mail]
Phone 800-BAYSAVER (800.229.7283) Fax [phone]

PROJECT qCl"S t 6 �' eS Z 3 SHEET OF
LaBeLLa PROJECTNO. 227.0gS CAMBY�S DATE za
Powered by partnership. SUBJECT SGM-44-2 CA V,(A rno►l3s SCALE
CHECKED BY
Z- /,A -
_ I I
-F =- q - =((
I N4 PZV 1 v u s Ae`i�s 2 SGM +
I � I
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SI SF -
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6� -
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Do ►2�r=sn�: rz =
I -I I d s x 3= ;-Vs.�- s io
IfS� sF X 4 = t4 2,r
152 sFX I
= ISM
L SF_ v
1701 SF ,� 3 -- 3& SF

PROJECT 4"5 L�e ` " Z 1� 3 SHEET 2 OF
La Be Ra PROJECT NO. ZZ/ Sys CALC. BY 1! 1A)-5 DATE ah-10
Powered by partnership. SUBJECT L S SCALE
CHECKED BY
5Tr�2-73 r 1�6q 7- sr
�MCoe 7vivv `r(2 56 4� 2 = 621 Ir
'I'
13�,08 n3 yoZ S (— 3 — S83 FT3

Hanes Lake Phase 2
S CM #2
2
PRE -DEVELOPMENT POST-DEV LOPMENT
3
SCM #2
5bcat Reach IU
1

2212045 SCM2 Calculation_083122 Table of Contents
Prepared by Labella & Associates, PC Printed 9/1 /2022
H droCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC
TABLE OF CONTENTS
Promect Reports
1 Routing Diagram
2 Rainfall Events Listing (selected events)
3 Area Listing (all nodes)
4 Soil Listing (all nodes)
5 Ground Covers (all nodes)
6 Pipe Listing (all nodes)
1-yr Event
7 Node Listing
8 Subcat 1: PRE -DEVELOPMENT
9 Subcat 2: POST -DEVELOPMENT
10 Pond 3: SCM #2
10-vr Event
14 Node Listing
15 Subcat 1: PRE -DEVELOPMENT
16 Subcat 2: POST -DEVELOPMENT
17 Pond 3: SCM #2

2212045 SCM2 Calculation 083122
Prepared by Labella & Associates, PC Printed 9/1 /2022
H droCAD®10.10-4b s/n 09581 ©2020 HvdroCAD Software Solutions LLC Pa e 2
Rainfall Events Listing (selected events)
Event# Event Storm Type Curve Mode Duration B/B Depth AMC
Name (hours) (inches)
1 1-yr Type II 24-hr Default 24.00 1 2.80 2
2 10-yr Type II 24-hr Default 24.00 1 4.88 2

2212045 SCM2 Calculation 083122
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCADO 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Page 3
Area Listing (all nodes)
Area CN Description
(acres) (subcatchment-numbers)
4.110 61 >75% Grass cover, Good, HSG B (1)
1.430 98 Paved roads w/curbs & sewers, HSG B (2)

2212045 SCM2 Calculation 083122
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Pa e 4
Soil Listing (all nodes)
Area Soil Subcatchment
(acres) Group Numbers
0.000 HSG A
5.540 HSG B 1,2
0.000 HSG C
0.000 HSG D
0.000 Other

2212045 SCM2 Calculation_083122
Prepared by Labella & Associates, PC
HvdroCAD® 10.10-4b s/n 09581 © 2020 HydroCAD Software Solutions LLC
Ground Covers (all nodes)
HSG-A HSG-B HSG-C HSG-D Other Total Ground
(acres) (acres) (acres) (acres) (acres) (acres) Cover
Printed 9/1/2022
Paae 5
Subcatchme
Numbers
0.000 4.110 0.000 0.000 0.000 4.110 >75% Grass cover, Good 11
0.000 1.430 0.000 0.000 0.000 1.430 Paved roads w/curbs & sewers 2

2212045 SCM2 Calculation 083122
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD®10.10-4b s/n 09581 ©2020 H droCAD Software Solutions LLC Page 6
Pipe Listing (all nodes)
Line# Node In -Invert Out -Invert Length Slope n Width Diam/Height Inside -Fill
Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches)
1 3 783.18 782.21 96.5 0.0101 0.013 0.0 15.0 0.0

2212045 SCM2 Calculation_083122 Type // 24-hr 1-yr Rainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC Page 7
Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchment1: PRE -DEVELOPMENT Runoff Area=4.110 ac 0.00% Impervious Runoff Depth>0.24"
Flow Length=791' Tc=13.8 min CN=61 Runoff=0.89 cfs 0.084 of
Subcatchment2: POST -DEVELOPMENT Runoff Area=1.430 ac 100.00% Impervious Runoff Depth>2.38"
Tc=5.0 min CN=98 Runoff=5.70 cfs 0.284 of
Pond 3: SCM #2 Peak Elev=786.24' Storage=7,553 cf Inflow=5.70 cfs 0.284 of
Outflow=0.13 cfs 0.131 of

2212045 SCM2 Calculation_083122 Type 1124-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HydroCAD Software Solutions LLC Page 8
Summary for Subcatchment 1: PRE -DEVELOPMENT
Runoff = 0.89 cfs @ 12.11 hrs, Volume= 0.084 af, Depth> 0.24"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.80"
Area (ac) CN Description
4.110 61 >75% Grass cover, Good. HSG B
4.110 100.00% Pervious Area
Tc
Length
Slope
Velocity
Capacity Description
(min)
(feet)
(ft/ft)
(ft/sec)
cfs
10.7
100
0.0377
0.16
Sheet Flow, SHEET FLOW
Grass: Dense n= 0.240 P2= 3.41"
3.1
691
0.0622
3.74
Shallow Concentrated Flow, SHALLOW CONCENTRATED
Grassed Waterwav Kv= 15.0 fps
13.8 791 Total
Subcatchment 1: PRE -DEVELOPMENT
Hydrograph
�] Runoff
0-95
nesd-
09Type II 24-hr
0.85-
°.8, 1-yr Rainfall=2.80"
0-75
0-7- Runoff Area=4.110 ac
Runoff Volume=0.084 of
0.6 '
0.55 Runoff Depth>0.24"
LL 0.45Flow Length=791'
0.4 -
0.35, Tc=13.8 min
03- CN=61
0.25
0.2'
0.19
0.1
0,65
p
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

2212045 SCM2 Calculation_083122 Type 1124-hr 1-yr Rainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 HydroCAD Software Solutions LLC Page 9
Summary for Subcatchment 2: POST -DEVELOPMENT
Runoff = 5.70 cfs @ 11.95 hrs, Volume= 0.284 af, Depth> 2.38"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.80"
Area (ac) CN Description
1.430 98 Paved roads w/curbs & sewers, HSG B
1.430 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) feet (ft/ft) ft/sec) cfs
5.0 Direct Entry,
Subcatchment 2: POST -DEVELOPMENT
Hydrograph
6 5 ra crs
Type II 24-hr
5 1-yr Rainfall=2.80"
Runoff Area=1.430 ac
4 Runoff Volume=0.284 of
Runoff Depth>2.38"
3 Tc=5.0 m i n
LL
CN=98
f
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

2212045_SCM2 Calculation_083122 Type 1124-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCADO 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Page 10
Summary for Pond 3: SCM #2
Inflow Area = 1.430 ac,100.00% Impervious, Inflow Depth > 2.38" for 1-yr event
Inflow = 5.70 cfs @ 11.95 hrs, Volume= 0.284 of
Outflow = 0.13 cfs @ 14.69 hrs, Volume= 0.131 af, Atten= 98%, Lag= 164.5 min
Primary = 0.13 cfs @ 14.69 hrs, Volume= 0.131 of
Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Peak Elev= 786.24' @ 14.69 hrs Surf.Area= 4,808 sf Storage= 7,553 cf
Plug -Flow detention time=177.8 min calculated for 0.131 of (46% of inflow)
Center -of -Mass det. time= 85.0 min ( 818.7 - 733.7 )
Volume
Invert
Avail.Stora a
Storage Description
#1
785.02'
9,786 cf
Custom Stage DataListed below
#2A
784.85'
4,770 cf
30.00'W x 160.26'L x 3.75'H STONE
18,029 cf Overall - 6,104 cf Embedded = 11,925 cf x 40.0% Voids
#3A
785.60'
6,104 cf
ADS —StormTech DC-780 +Capx 132 Inside #2
Effective Size= 45.4"W x 30.0"H => 6.49 sf x 7.12'L = 46.2 cf
Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
132 Chambers in 6 Rows
20,660 cf Total Available Storage
Storage Group A created with Chamber Wizard

2212045 SCM2 Calculation_083122 Type // 24-hr 1-yr Rainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Pane 11
Elevation
(feet)
Cum.Store
(cubic4eet)
785.02
0
785.10
445
785.18
593
785.27
742
785.35
890
785.43
1,039
785.52
1,187
785.60
1,335
785.68
1,634
785.77
1,932
785.85
2,228
785.93
2,522
786.02
2,815
786.10
3,106
786.18
3,394
786.27
3,681
786.35
3,965
786.43
4,247
786.52
4,526
786.60
4,802
786.68
5,076
786.77
5,346
786.85
5,613
786.93
5,876
787.02
6,135
787.10
6,391
787.18
6,642
787.27
6,888
787.35
7,128
787.43
7,362
787.52
7,590
787.60
7,811
787.68
8,024
787.77
8,227
787.85
8,416
787.93
8,584
788.02
8,743
788.10
8,896
788.18
9,044
788.27
9,192
788.35
9,341
788.43
9,489
788.52
9,637
788.60
9,786
Device Routing Invert Outlet Devices
#1 Primary 783.18' 15.0" Round BF2 TO DMH6 L= 96.5' Ke= 0.500
Inlet / Outlet Invert= 783.18' / 782.21' S= 0.0101 T Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf
#2 Device 1 783.18' 1.7" Vert. EQUIVALENT ORIFICE C= 0.600

2212045 SCM2 Calculation_083122 Type 1124-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD®10.10-4b s/n 09581 ©2020 H droCAD Software Solutions LLC Page 12
Limited to weir flow at low heads
#3 Device 1 786.38' 2.5' long x 0.5' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00
Coef. (English) 2.80 2.92 3.08 3.30 3.32
Primary OutFlow Max=0.13 cfs @ 14.69 hrs HW=786.24' (Free Discharge)
'�--1=BF2 TO DMH6 (Passes 0.13 cfs of 8.47 cfs potential flow)
�__3=13road-C
2=EQUIVALENT ORIFICE (Orifice Controls 0.13 cfs @ 8.32 fps)
rested Rectangular Weir( Controls 0.00 cfs)
6
5
4
N
V
3 3
0
LL
2
1
0
5
6 7 8 9 10
Pond 3: SCM #2
11 12 13 14 15 16 17 18 19 20
Time (hours)
F inflow
® Primary

2212045_SCM2 Calculation_083122 Type // 24-hr 1-yrRainfall=2.80"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD®10.10-4b s/n 09581 ©2020 H droCAD Software Solutions LLC Page 13
Elevation
Storage
(feet)
(cubic -feet)
784.85
0
784.90
96
784.95
192
785.00
288
785.05
551
785.10
926
785.15
1,114
785.20
1,299
785.25
1,478
785.30
1,663
785.35
1,852
785.40
2,041
785.45
2,226
785.50
2,404
785.55
2,589
785.60
2,777
785.65
3,167
785.70
3,547
785.75
3,915
785.80
4,293
785.85
4,678
785.90
5,062
785.95
5,436
786.00
5,797
786.05
6,168
786.10
6,547
786.15
6,922
786.20
7,289
786.25
7,642
786.30
8,005
786.35
8,375
786.40
8,742
786.45
9,099
786.50
9,443
786.55
9,796
786.60
10,154
786.65
10,510
786.70
10,857
786.75
11,189
786.80
11,530
786.85
11,877
786.90
12,219
786.95
12,551
787.00
12,870
787.05
13,196
787.10
13,527
787.15
13,853
787.20
14,169
787.25
14,471
787.30
14,778
787.35
15,088
787.40
15,392
Stage -Area -Storage for Pond 3: SCM #2
Elevation
Storage
(feet)
(cubic -feet)
787.45
15,686
787.50
15,965
787.55
16,248
787.60
16,532
787.65
16,808
787.70
17,072
787.75
17,319
787.80
17,564
787.85
17,803
787.90
18,022
787.95
18,229
788.00
18,421
788.05
18,615
788.10
18,808
788.15
18,997
788.20
19,181
788.25
19,360
788.30
19,545
788.35
19,734
788.40
19,923
788.45
20,107
788.50
20,285
788.55
20,470
788.60
20,660

2212045 SCM2 Calculation_083122 Type 1124-hr 90-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCADO 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Page 14
Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchmentl: PRE -DEVELOPMENT Runoff Area=4.110 ac 0.00% Impervious Runoff Depth>1.15"
Flow Length=791' Tc=13.8 min CN=61 Runoff=6.61 cfs 0.395 of
Subcatchment2: POST -DEVELOPMENT Runoff Area=1.430 ac 100.00% Impervious Runoff Depth>4.26"
Tc=5.0 min CN=98 Runoff=10.04 cfs 0.508 of
Pond 3: SCM #2 Peak Elev=786.81' Storage=11,575 cf Inflow=10.04 cfs 0.508 of
Outflow=2.19 cfs 0.313 of

2212045 SCM2 Calculation_083122 Type Il 24-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Pa e 15
Summary for Subcatchment 1: PRE -DEVELOPMENT
Runoff = 6.61 cfs @ 12.07 hrs, Volume= 0.395 af, Depth> 1.15"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=4.88"
Area ac CN Description
4.110 61 >75% Grass cover. Good, HSG B
4.110 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min feet ft/ft) (ft/sec) cfs)
10.7 100 0.0377 0.16 Sheet Flow, SHEET FLOW
Grass: Dense n= 0.240 P2= 3.41"
3.1 691 0.0622 3.74 Shallow Concentrated Flow, SHALLOW CONCENTRATED
Grassed Waterwav Kv= 15.0 fps
13.8 791 Total
Subcatchment 1: PRE -DEVELOPMENT
Hydrograph
■ Runoff
7 a.fl1 r1F
Type 11 24-hr
6- 10-yr Rainfall=4.88"
Runoff Area=4.110 ac
Runoff Volume=0.395 of
4- Runoff Depth>1.15"
Flow Length=791'
3 Tc=13.8 min
2. CN=61
1
0 . .
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

2212045 SCM2 Calculation_083122 Type // 24-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Page 16
Summary for Subcatchment 2: POST -DEVELOPMENT
Runoff = 10.04 cfs @ 11.95 hrs, Volume= 0.508 af, Depth> 4.26"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=4.88"
Area (ac) CN Description
1.430 98 Paved roads w/curbs & sewers, HSG B
1.430 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
min (feet) ft/ft (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 2: POST -DEVELOPMENT
Hydrograph
11-
i Type II 24-hr
9.: 10-yr Rainfall=4.88"
8 Runoff Area=1.430 ac
7 Runoff Volume=0.508 of
Runoff Depth>4.26"
0 5, Tc=5.0 min
CN=98
2-
%all
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 20
Time (hours)
E Runoff

2212045 SCM2 Calculation_083122 Type 11 24-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1 /2022
H droCAD®10.10-4b s/n 09581 ©2020 H droCAD Software Solutions LLC Page 17
Summary for Pond 3: SCM #2
Inflow Area = 1.430 ac,100.00% Impervious, Inflow Depth > 4.26" for 10-yr event
Inflow = 10.04 cfs @ 11.95 hrs, Volume= 0.508 of
Outflow = 2.19 cfs @ 12.11 hrs, Volume= 0.313 af, Atten= 78%, Lag= 9.8 min
Primary = 2.19 cfs @ 12.11 hrs, Volume= 0.313 of
Routing by Star -Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Peak Elev= 786.81' @ 12.11 hrs Surf.Area= 4,808 sf Storage= 11,575 cf
Plug -Flow detention time= 133.7 min calculated for 0.313 of (62% of inflow)
Center -of -Mass det. time= 58.5 min ( 787.9 - 729.5 )
Volume
Invert
Avail.Stora a
Storage Description
#1
785.02'
9,786 cf
Custom Stage DataListed below
#2A
784.85'
4,770 cf
30.00'W x 160.26'L x 3.75'H STONE
18,029 cf Overall - 6,104 cf Embedded = 11,925 cf x 40.0% Voids
#3A
785.60'
6,104 cf
ADS DC-780 +Capx 132 Inside #2
_StormTech
Effective Size= 45.4"W x 30.0"H => 6.49 sf x 7.121 = 46.2 cf
Overall Size= 51.0"W x 30.0"H x 7.561 with 0.44' Overlap
132 Chambers in 6 Rows
20,660 cf Total Available Storage
Storage Group A created with Chamber Wizard

2212045 SCM2 Calculation_083122 Type 1124-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
HvdroCAD® 10.10-4b s/n 09581 © 2020 H droCAD Software Solutions LLC Page 18
Elevation
Cum.Store
(feet)
(cubic -feet)
785.02
0
785.10
445
785.18
593
785.27
742
785.35
890
785.43
1,039
785.52
1,187
785.60
1,335
785.68
1,634
785.77
1,932
785.85
2,228
785.93
2,522
786.02
2,815
786.10
3,106
786.18
3,394
786.27
3,681
786.35
3,965
786.43
4,247
786.52
4,526
786.60
4,802
786.68
5,076
786.77
5,346
786.85
5,613
786.93
5,876
787.02
6,135
787.10
6,391
787.18
6,642
787.27
6,888
787.35
7,128
787.43
7,362
787.52
7,590
787.60
7,811
787.68
8,024
787.77
8,227
787.85
8,416
787.93
8,584
788.02
8,743
788.10
8,896
788.18
9,044
788.27
9,192
788.35
9,341
788.43
9,489
788.52
9,637
788.60
9,786
Device Routing Invert Outlet Devices
#1 Primary 783.18' 15.0" Round BF2 TO DMH6 L= 96.5' Ke= 0.500
Inlet / Outlet Invert= 783.18' / 782.21' S= 0.0101 T Cc= 0.900
n= 0.013 Concrete sewer w/manholes & inlets, Flow Area= 1.23 sf
#2 Device 1 783.18' 1.7" Vert. EQUIVALENT ORIFICE C= 0.600

2212045 SCM2 Calculation_083122 Type 1124-hr 10-yr Rainfall=4.88"
Prepared by Labella & Associates, PC Printed 9/1/2022
H droCAD® 10.10-4b s/n 09581 © 2020 HvjroCAD Software Solutions LLC Page 19
Limited to weir flow at low heads
#3 Device 1 786.38' 2.5' long x 0.5' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00
Coef. (English) 2.80 2.92 3.08 3.30 3.32
Primary ❑utFlow Max=2.16 cfs @ 12.11 hrs HW=786.80' (Free Discharge)
I—'-1=BF2 TO DMH6 (Passes 2.16 cfs of 9.30 cfs potential flow)
12=EQUIVALENT ORIFICE (Orifice Controls 0.14 cfs @ 9.07 fps)
3=Broad-Crested Rectangular Weir(Weir Controls 2.02 cfs @ 1.91 fps)
Pond 3: SCM #2
Hydrograph
11 10 a
10 Inflow Area=1.430 ac
9 Peak Elev=786.81'
8 Storage=11,575 cf
7
N
V f7
3
0 5
LL
4
3
2 l9 ds
2
1-
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)
i Inflow
Primary

2212045_SCM2 Calculation_083122
Prepared by Labella & Associates, PC
Type // 24-hr 10-yr Rainfall=4.88"
Printed 9/1/2022
HvdroCADO 10.10-4b s/n 09581 © 2020 HvdroCAD Software Solutions LLC
Stage -Area -Storage for Pond 3: SCM #2
Elevation
(feet)
Storage
(cubic -feet)
Elevation
(feet)
Storage
(cubic -feet)
784.85
0
787.45
15,686
784.90
96
787.50
15,965
784.95
192
787.55
16,248
785.00
288
787.60
16,532
785.05
551
787.65
16,808
785.10
926
787.70
17,072
785.15
1,114
787.75
17,319
785.20
1,299
787.80
17,564
785.25
1,478
787.85
17,803
785.30
1,663
787.90
18,022
785.35
1,852
787.95
18,229
785.40
2,041
788.00
18,421
785.45
2,226
788.05
18,615
785.50
2,404
788.10
18,808
785.55
2,589
788.15
18,997
785.60
2,777
788.20
19,181
785.65
3,167
788.25
19,360
785.70
3,547
788.30
19,545
785.75
3,915
788.35
19,734
785.80
4,293
788.40
19,923
785.85
4,678
788.45
20,107
785.90
5,062
788.50
20,285
785.95
5,436
788.55
20,470
786.00
5,797
788.60
20,660
786.05
6,168
786.10
6,547
786.15
6,922
786.20
7,289
786.25
7,642
786.30
8,005
786.35
8,375
786.40
8,742
786.45
9,099
786.50
9,443
786.55
9,796
786.60
10,154
786.65
10,510
786.70
10,857
786.75
11,189
786.80
11,530
786.85
11,877
786.90
12,219
786.95
12,551
787.00
12,870
787.05
13,196
787.10
13,527
787.15
13,853
787.20
14,169
787.25
14,471
787.30
14,778
787.35
15,088
787.40
15,392

Project Name: Hanes Lake Phase 2
Location: Winston-Salem, NC
Site Designation: SCM-3
SITE CONDITIONS
Rainfall Depth
Impervious Acreage
Total Acreage
Time of Concentration
I
R (Runoff Coefficient)
WQ
75% WQv (Treatment Volume)
q,(Unit Peak Discharge)
QP(Water Quality Storm)
VOLUME BASED SIZING
Volume per cartridge
Cartridge Type
Min. Number of cartridge required
Cartridge Flow rate
System Flow Rate
Release time
SEDIMENT BASED SIZING
Influent Concentration
Annual Rainfall (P)
Annual Sediment Load
Pretreatment reduction
Sediment Load to BayFilter
85% Capture Capacity
Cartridge Type
Sediment load per cartridge
Min. Number of cartridge required
Anticipated Maintenance Cycle
FINAL DESIGN
Cartridge Type
Number of Cartridges
Precast Size
1
4.82
11.27
6
42.8
0.43
17792
13344
1000
7.66
1250
522
11
11.25
0.28
13.4
70
45
3140
30%
2198
1869
522
131
15
1.05
522
15
8'x 17'
approx outlet orifice 5.73 in
in
ac ✓
ac
min
cf
cf
csm/in
cfs
CF
gpm
cfs
hours
mg/L
in
Ibs
Ibs
Ibs
Ibs
From Type II Chart
(0.25 gpm/SF)
Date 8/31 /2022
years (must be greater than 1 year)

Project: Hanes Lake Phase 2 : SCM3 & BF3
StormT ch
Chamber Model -
DC-780
Units -
I Imperial
Number of chambers -
Voids in the stone (porosity) -
Base of Slone Elevation -
a7fl
Amount of Stone Above Chambers -
ill
Amount of Stone Below Chambers -
91
Area of system - 15458 sf Min. Area - 14333 sf min. area
Haight a[
Incremental ingle
neremer 1a[ T[ 2 ncreman
EntremanLal Ch
umu aEns
System
Chamber
Chamber Slone
8 Sl
Chamhaf
Devalion
@nchesJ
(cuhk IaelJ
(ruh+c leuF) �cua c rasp
(cubic /aul�
(cowc feel)
lZ
45 0.00
0.00
515.27
515.27
34957.65
768.92
44 0.00
0.00
51527
515.27
3444239
76884
43 0.00
0.00
515.27
51527
33927.12
768.75
42 000
0.00
51527
515.27
33411.85
768.67
41 0.00
000
515.27
515.27
32896.59
768.59
40 0.00
0.00
515.27
515.27
32381.32
768.50
39 0.06
24.54
505.45
529.99
31866.05
76842
38 0.17
70.68
486.99
557.68
3133606
768.34
37 0.29
121.52
466.66
588.18
30778.39
76825
36 0.61
259.08
411.63
670.72
3019020
76817
35 081
343.61
377.82
721.43
29519.49
768.09
34 0.96
406.64
352.61
759.25
28798.06
768.00
33 1.08
459.19
331.59
790.78
28038.81
767.92
32 1.19
503.58
313.84
817.41
27248.03
767.84
31 1.27
540.16
299.20
839.36
26430.62
76775
30 1.36
578.36
283.92
862.28
25591.25
767.67
29 1.45
616.67
268.60
88527
24728.97
767.59
28 1.53
64747
256.28
903.75
23943.70
767.50
27 159
674.60
245.42
920.03
22939.95
767.42
26 165
700.24
235.17
935.41
22019.92
767.34
25 1.71
72456
225.44
950.00
21084.52
767.25
24 1.76
747.35
216.33
963.67
20134.51
767.17
23 1.81
768.72
207.78
976.50
19170.84
767.09
22 1 86
788.74
199.77
988.51
18194.34
767.00
21 1.90
807.54
192.25
999.79
17205.83
766.92
20 1.95
825.17
185.20
1010.37
1620604
766.84
19 199
841.74
178.57
1020.31
15195.67
766.75
18 2.02
857.29
172.35
1029.64
14175.36
786.67
17 2.06
871.86
166.52
1038.39
13145.72
166.59
16 2.09
88551
161.06
1046.57
12107.34
76650
15 212
898.26
155.96
1054.22
11060.76
766.42
14 2.15
910.16
151.20
1061.36
10006.54
766.34
13 2.17
921.22
146.78
1068.00
8945.18
766.25
12 2.20
931.47
142.68
1074.15
787718
766.17
11 2.22
940.94
138.89
1079.83
6803.03
76609
10 2.24
950.89
134.91
1085.80
5723.20
766.00
9 0.00
0.00
515.27
515.27
4637.40
765.92
8 0.00
0.00
515.27
515.27
4122.13
765.84
7 0.00
0.00
515.27
515.27
3606.87
765.75
6 0.00
0.00
515.27
515.27
3091.60
765.67
5 0.00
000
515.27
515.27
2576.33
765.59
4 0.00
0.00
515.27
515.27
2061.07
765.50
3 0.00
0.00
515.27
515.27
1545.80
765.42
2 0.00
000
515.27
515.27
1030.53
765.34
1 0.00
0.00
515.27
515.27
515.27
765.25
WQ Volume: 13347cf
WQv achiev94 st e.aystlun• 766 61

BAYSAVER
TECHNOLOGIES
BavFilterTM Sizing Form
Project Contact Information
Company Name LaBella & Associates, PC
Date 8/3/22
Contact Name Brandon Sherrill
®Engineer ❑Developer ❑Contractor
Project Name Hanes Lake Phase 2-SCM #3
Email [e-mail]
Telephone [phone]
Fax
City Winston-Salem
State NC Zip 27101
Site Characteristics
Residential DCommercial ❑Industrial Mixed
I Due Date
Additional comments/project information
Design and Sizing Parameters
Total Drainage Area (acres) 11.27 11mpervious Area (acres) 4.82
Required Treatment Flow CFS (if applicable)
Water Quality Volume to be Detained
®75% 100% Other
Water Quality Volume (ft) 13347
Pro*ect Location: City Winston-Salem ST NC
RegulatoryRe uirements
% Total Suspended Solids Removal % Total Phosphorus Removal (ex. 50%)
(ex. 80%) Meet NCDEQ Standards I Meet NCDEQ Standards
Project Stage LIConceptual Design EPreliminary Design Final Design ❑Other
Other Site Specific Sizing Criteria
The System Pretreatment Credit shall be 30% if system includes a minimum sediment
sump with minimum dimensions of 4' diameter by 2' deep.
Thank you for supplying the required information! You're almost done!
We will also need:
Plan(s) View
Profile(s)
lvl l\ 1 U V V 1.3 f ff
Please email this form and any drawings to [e-mail]
Phone 800-BAYSAVER (800.229.7283) Fax [phone]