SW3220301_Design Calculations_20220420

REVISED EROSION CONTROL
& STORMWATER MNGT
CALCULATIONS
For
MINI STORAGE USA, INC
MINI WAREHOUSE PROJECT
Union County
,,.;A
SEAL
20165
//V E HA
�� z2
Kevin E. Herring
ENGINEERING
W01 SAwRoad
Oaldiofq NC28129
91SO�b71-Q�5

Job: Mini Storage USA Job No. Date 12/15/2021 Sheet
Subject: Latitude & Longitude Exhibit By KEH Chk By

NARRATIVE (Revised)
Mini -Storage USA is a proposed mini -warehouse project located off Hwy 74 in Wingate
NC (Union County). The site is in the Yadkin Pee -Dee River Basin and drains to Rays
Fork Creek. The site is in the Town of Wingate Zoning District. Stormwater is regulated
by NCDEQ.
The scope of work includes clearing, grubbing, and grading for building pads. Scope
also includes the installation of temporary skimmer basin, silt fence, coir mesh wattle
check dams, stone base, and pavement.
The disturbed acreage is 1.8 acres.
Based on USDA Web Soil Survey data the area soils primarily classify as BuB, a Badin-
Urban land complex indicative of a hydraulic group C.
There are no jurisdictional features on the site as verified by Thompson Environmental.
A Sand Filter SCM is proposed to provide the required water quality treatment and water
quantity runoff controls as required by NCDEQ & Town of Wingate. The SCM Sand
Filter is designed in accordance with NCDEQ Minimum Design Criteria requirements.
The SHWT was evaluated by Thompson Environmental.
It is anticipated that the mini -warehouse units will be constructed in 3 phases. The
development is proposed as "high density". The SCM is designed to treat and control a
built upon area of 1.305 acres at ultimate built out.

EROSION CONTROL
CALCULATIONS

LIGHT
— ----- ---- oh e
------------
a g�
' N' ' ti
.. GATE
POLE
/
C
— — — — — -
o
/
BUILDING
12
din
POLE
UGKT
T
� 1
/
r�
/ �/ / /
/
•' rop
BASIN
1.67ac
' ist Area = 1.61 ac
C = 0.60
SKIMMER BASIN DRAINAGE AREA Scale 1" = 51

Job Name Mini Storage USA Job No. Date 1/15/2022 Sheet
Subject TEMP SKIMMER BASIN (Updated to Riser Skimmer Basin) By KEH Chk By
DETERMINE REQUIRED TRAP DIMENSIONS
RISER
DISCHARGE
REQUIRED
DIMENSIONS
SURFACE AREA
SKIMMER
DRAINAGE
DISTURBED
Q=CIA*
SURFACE AREA
@ TOP OF PRIMARY SPILLWAY
PROVIDED
BASIN
AREA (Ac)
AREA(Ac)
(cfs)
(435)0(10) (sq ft)
W L D
(sq ft)
SB
1.67 1.61 7.81
3398
34 X 240 X 2
8160
Where C= 0,60 (composite) 1= 7.78 in/hr, Tc= 5 min for (10 year Storm)
DETERMINE STORAGE CAPACITY (At Skimmer Crest)
RISER
SKIMMER
BASIN
DISTURBED
AREA(Ac)
REQUIRED
STORAGE VOLUME
1800cf per Acre Dist
STORAGE VOLUME
PROVIDED
(cu ft)
SB
1.61
2890
13056
Storage Volume based on 2:1 Side Slopes of Basin
SKIMMER ORIFICE DIAMETER (Determined by Faircloth Method)
Calculate Skimmer Size
Basin Volume in Cubic Feet 13,100 Cu-Ft
Days to Drain* 3 Days
in 1-IC assume 3 days to Crain
C171= GMGR(ZFNr`V CPII I WAV
Skimmer Size
Orifice Radius
Orifice Diameter
RISER
SKIMMER
BASIN
DISCHARGE
Q=CIA*
(cfs)
FROM CHART 8.07c
Minimum Emergency Spillway
BOTTOM
OF BASIN
SEDIMENT BASIN ELEVATIONS
SKIMMER EMERGENCY
CREST SPILLWAY
MIN. TOP
OF DAM
Q (cfs)
WIDTH (ft)
STAGE (ft)
SB
7.81
10
8
0.68
556.5
558.5
559.5
561.18
556.5
559.3
560.3
561.5
Referenced Tables and Charts from NC trosion b seatmenr Conrro► manuar (umess ornerwise norea)
2.6 Inch
1.0 Inch[es]
2.1 Inch[es]
Minimum
Actual
NOTE: Surface area of final SCM Pond at 559.3 (Riser Weir elev) = 3430 sf > 3398sf req'd for skimmer therefore okay to
fill extended area when upstream condition is fully stabilized

0
Table 8.07d
Design Table for Vegetated Spillways Excavated in Very Erodible Soils
(side slopes-3 horizontal:1 vertical)
Appendices
Discharge
Q
CFS
Slope Range
Bottom
Width
Feet
Stage
Feet
Minimum
Percent
Maximum
Percent
10
3.5
4.7
8
.68
15
3.4
4.4
12
.69
3.4
5.9
16
.60
20
3.3
3.3
12
.80
3.3
4.1
16
.70
3.5
5.3
20
.62
25
3.3
3.3
16
.79
3.3
4.0
20
.70
3.5
4.9
24
.64
30
3.3
3.3
20
.78
3.3
4.0
24
.71
3.4
4.7
28
.65
3.4
5.5
32
.61
35
3.2
3.2
24
.77
3.3
3.9
28
.71
3.5
4.6
32
.66
3.5
5.2
36
.62
40
3.3
3.3
28
.76
3.4
3.8
32
.71
3.4
4.4
36
.67
3.4
5.0
40
.64
45
3.3
3.3
32
.76
3.4
3.8
36
.71
3.4
4.3
40
.67
3.4
4.8
44
.64
50
3.3
3.3
36
.75
3.3
3.8
40
.71
3.3
4.3
44
.68
60
3.2
3.2
44
.75
3.2
3.7
48
.72
70
3.3
3.3
52
.75
80
3.1
3.1
56
.78
Example of Use
Given: Discharge, 0 = 38 c.f.s. Spillway slope, Exit section (from profile) = 4%.
Find: Bottom width and Stage in Spillway.
Procedure: Enter table from left at 40 c.f.s. Note that Spillway slope (4.0%) falls within slope ranges corresponding
to bottom widths of 36 and 40 ft. Use wider bottom width, 40 ft., to minimize velocity. Stage in Spillway
will be 0.64 ft.
Note: Computations based on: Roughness coefficient, n = 0.40. Maximum velocity = 3.50 ft. per sec.
Rev. 6/06 8.07.9

Final Pond Area & Storage
Rev1_Sand Filter _Post_011022 Type 1124-hr I00yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/14/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Stage -Area -Storage for Pond 3P: SCM
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
557.80
520
0
557.81
617
6
557.82
714
12
557.83
811
20
557.84
908
29
557.85
1,005
38
557.86
1,102
49
557.87
1,199
60
557.88
1,296
73
557.89
1,393
86
557.90
1,490
101
557.91
1,587
116
557.92
1,684
132
557.93
1,781
150
557.94
1,878
168
557.95
1,975
187
557.96
2,072
207
557.97
2,169
229
557.98
2,266
251
557.99
2,363
274
558.00
2,460
298
558.01
2,467
323
558.02
2,475
347
558.03
2,482
372
558.04
2,489
397
558.05
2,496
422
558.06
2,504
447
558.07
2,511
472
558.08
2,518
497
558.09
2,526
522
558.10
2,533
548
558.11
2,540
573
558.12
2,548
598
558.13
2,555
624
558.14
2,562
650
558.15
2,569
675
558.16
2,577
701
558.17
2,584
727
558.18
2,591
753
558.19
2,599
779
558.20
2,606
805
558.21
2,613
831
558.22
2,621
857
558.23
2,628
883
558.24
2,635
909
558.25
2,643
936
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
558.26
2,650
962
558.27
2,657
989
558.28
2,664
1,015
558.29
2,672
1,042
558.30
2,679
1,069
558.31
2,686
1,096
558.32
2,694
1,123
558.33
2,701
1,150
558.34
2,708
1,177
558.35
2,715
1,204
558.36
2,723
1,231
558.37
2,730
1,258
558.38
2,737
1,286
558.39
2,745
1,313
558.40
2,752
1,340
558.41
2,759
1,368
558.42
2,767
1,396
558.43
2,774
1,423
558.44
2,781
1,451
558.45
2,788
1,479
558.46
2,796
1,507
558.47
2,803
1,535
558.48
2,810
1,563
558.49
2,818
1,591
558.50
2,825
1,619
558.51
2,832
1,648
558.52
2,840
1,676
558.53
2,847
1,704
558.54
2,854
1,733
558.55
2,861
1,761
558.56
2,869
1,790
558.57
2,876
1,819
558.58
2,883
1,848
558.59
2,891
1,876
558.60
2,898
1,905
558.61
2,905
1,934
558.62
2,913
1,964
558.63
2,920
1,993
558.64
2,927
2,022
558.65
2,934
2,051
558.66
2,942
2,081
558.67
2,949
2,110
558.68
2,956
2,140
558.69
2,964
2,169
558.70
2,971
2,199
558.71
2,978
2,229

Rev1_Sand Filter _Post_011022 Type/1 24-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 1/14/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Stage -Area -Storage for Pond 3P: SCM (continued)
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
558.72
2,986
2,258
558.73
2,993
2,288
558.74
3,000
2,318
558.75
3,008
2,348
558.76
3,015
2,378
558.77
3,022
2,409
558.78
3,029
2,439
558.79
3,037
2,469
558.80
3,044
2,500
558.81
3,051
2,530
558.82
3,059
2,561
558.83
3,066
2,591
558.84
3,073
2,622
558.85
3,080
2,653
558.86
3,088
2,684
558.87
3,095
2,714
558.88
3,102
2,745
558.89
3,110
2,777
558.90
3,117
2,808
558.91
3,124
2,839
558.92
3,132
2,870
558.93
3,139
2,901
558.94
3,146
2,933
558.95
3,153
2,964
558.96
3,161
2,996
558.97
3,168
3,028
558.98
3,175
3,059
558.99
3,183
3,091
559.00
3,190
3,123
559.01
3,198
3,155
559.02
3,206
3,187
559.03
3,214
3,219
559.04
3,222
3,251
559.05
3,230
3,283
559.06
3,238
3,316
559.07
3,246
3,348
559.08
3,254
3,381
559.09
3,262
3,413
559.10
3,270
3,446
559.11
3,278
3,479
559.12
3,286
3,512
559.13
3,294
3,544
559.14
3,302
3,577
559.15
3,310
3,610
559.16
3,318
3,644
559.17
3,326
3,677
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
559.18
3,334
3,710
559.19
3,342
3,744
559.20
3,350
3,777
559.21
3,358
3,811
559.22
3,366
3,844
559.23
3,374
3,878
559.24
3,382
3,912
559.25
3,390
3,946
559.26
3,398
3,979
559.27
3,406
4,013
559.28
3,414
4,048
559.29
3,422
4,082
559.30
3,430
4,116
559.31
3,438
4,150
559.32
3,446
4,185
559.33
3,454
4,219
559.34
3,462
4,254
559.35
3,470
4,288
559.36
3,478
4,323
559.37
3,486
4,358
559.38
3,494
4,393
559.39
3,502
4,428
559.40
3,510
4,463
559.41
3,518
4,498
559.42
3,526
4,533
559.43
3,534
4,569
559.44
3,542
4,604
559.45
3,550
4,639
559.46
3,558
4,675
559.47
3,566
4,711
559.48
3,574
4,746
559.49
3,582
4,782
559.50
3,590
4,818
559.51
3,598
4,854
559.52
3,606
4,890
559.53
3,614
4,926
559.54
3,622
4,962
559.55
3,630
4,998
559.56
3,638
5,035
559.57
3,646
5,071
559.58
3,654
5,108
559.59
3,662
5,144
559.60
3,670
5,181
559.61
3,678
5,218
559.62
3,686
5,255
559.63
3,694
5,291

M,k
USL
Table 2
ADS N-12 (per AASHTO) Mechanical Properties
Cell Class
Factored
Compressive
Tension
Strain (%)
Initial
75-Year
Fu
E
Fu
E
Strain (%)(psi)
(psi)
(psi)
(psi)
ASTM D3350
4.1
5.0
3,000
110,000
900
21,000
435400C
Table 3
Maximum Cover for ADS N-12, N-12 ST, and N-12 WT Pipe (per AASHTO), ft (m)
Diameter
in. (mm)
Class 1
Class 2
Class 3
Compacted
Dumped
950/0
90%
85%3
95%
90%3
4 (100)
37
(11.3)
18
(5.5)
25
(7.6)
18
(5.5)
12
(3.7)
18
(5.5)
13
(4.0)
6 (150)
44
(13.4)
20
(6.1)
29
(8.8)
20
(6.1)
14
(4.3)
21
(6.4)
15
(4.6)
8 (200)
32
(9.8)
15
(4.6)
22
(6.7)
15
(4.6)
10
(3.0)
16
(4.9)
11
(3.4)
10 (250)
38
(11.6)
18
(5.5)
26
(7.9)
18
(5.5)
12
(3.7)
18
(5.5)
13
(4.0)
12 (300)
35
(10.7)
17
(5.2)
24
(7.3)
17
(5.2)
8
(2.4)
(5.2)
11
(3.4)
15 375
38
11.6
17
5.2
25
7.6
17
5.2
8
2.4
18
5.5
11
3.4
18 (450)
36
(11.0)
17
(5.2)
24
(7.3)
17
(5.2)
8
(2.4)
(5.2)
11
(3.4)
24 (600)
28
(8.5)
13
(4.0)
20
(6.1)
13
(4.0)
7
(2.1)
14
(4.3)
10
(3.0)
30 (750)
28
(8.5)
13
(4.0)
20
(6.1)
13
(4.0)
7
(2.1)
14
(4.3)
9
(2.7)
36 (900)
26
(7.9)
12
(3.7)
18
(5.5)
12
(3.7)
7
(2.1)
13
(4.0)
9
(2.7)
42 (1050)
23
(7.0)
11
(3.4)
16
(4.9)
11
(3.4)
7
(2.1)
11
(3.4)
7
(2.1)
48 (1200)
25
(7.6)
11
(3.4)
17
(5.2)
11
(3.4)
7
(2.1)
12
(3.7)
7
(2.1)
54 (1350)
22
(6.7)
10
(3.0)
16
(4.9)
10
(3.0)
6
(1.8)
11
(3.4)
7
(2.1)
60 (1500)
25
(7.6)
11
(3.4)
17
(5.2)
11
(3.4)
6
(1.8)
12
(3.7)
7
(2.1)
Notes:
1. Results based on calculations shown in the Structures section of the ADS Drainage Handbook (v20.7). Calculations
assume no hydrostatic pressure and a density of 120 pcf (1926 kg/m3) for overburden material.
2. Installation assumed to be in accordance with ASTM D2321 and the Installation section of the Drainage Handbook.
3. For installations using lower quality backfill materials or lower compaction efforts, pipe deflection may exceed the 5%
design limit; however controlled deflection may not be a structurally limiting factor for the pipe. For installations where
deflection is critical, pipe placement techniques or periodic deflection measurements may be required to ensure
satisfactory pipe installation.
4. Backfill materials and compaction levels not shown in the table may also be acceptable. Contact ADS for further detail.
5. Material must be adequately 'knifed" into haunch and in between corrugations. Compaction and backfill material is
assumed uniform throughout entire backfill zone.
6. Compaction levels shown are for standard Proctor density.
7. For projects where cover exceeds the maximum values listed above, contact ADS for specific design considerations.
8. Calculations assume no hydrostatic pressure. Hydrostatic pressure will result in a reduction in allowable fill height.
Reduction in allowable fill height must be assessed by the design engineer for the specific field conditions.
9. Fill height for dumped Class I material incorporate an additional degree of conservatism that is difficult to assess due to
the large degree of variation in the consolidation of this material as it is dumped. There is limited analytical data on its
performance. For this reason, values as shown are estimated to be conservatively equivalent to Class 2, 90% SPD.
4640 TRUEMAN BLVD. HILLIARD, OH 43026 [phone] www.ads-pipe.com 3
ATN2.01 © ADS 2020

APRON
CALCULATIONS

DITCH CALCULATIONS

- - - - - - - - - - - - - - - - - °h - - - - - - - - - - -
i- - - - - - - - - - -
------=� - o- - - - - - - /, \Y'LIGHT
ohe -
\ / ohe
-- --
' ! -- '---- ' -- --, - D 1 DA = 0.12ac
Avg Slope = 1.4%
C = 0.50
Tc = 5min
GAR I /
-PWkR r �'
POLE
-------------
j PD2 DA = 0.02�c
t „ Avg Slope = 2.5%
' / �' C = 0.50
= I '� I
Tc = 5min
--------------
POW$ / ��----
POLEI—
I
163 sf. (Deed Overlap)
N8336_55"E 10&22
/ / / 4---- --- 05W 10—T �16Hf
(POLE
SKER
MANHOLE
/ / s
'' '' ' 516 J5 jq W
SEWER
MANHOLE
PERMANENT DITCH DRAINAGE AREAS Scale 1" = 50

Job Name Mini Storage USA Job No.
Subject DIVERSION CHANNEL SUMMARY SHEET
Date 12/8/2021
By KEH
<4.5f/s <1.0' F Design
Sheet
Chk By
Diversion
Channel
Drainage
Area (Ac)
Average
Slope (%)
Bottom
Width(ft)
Side Slope
ft/ft
Velocity
ft/s
Flow
Depth (ft)
Depth for
Liner (ft)
Top Width
T ft
Temporary
Liner
PD-1
0.12
1.40
0.50
2
1.28
0.34
1.00
4.50
STRAW WITH NET
PD-2
0.02
2.50
1 0.50
2
0.96
0.12
1.00
4.50
STRAW WITH NET
STRAW WITH NET" TO BE NAG S-75 OR EQUAL

Job Name Mini Storage USA Job No. Date 12/8/2021 Sheet
Subject PERMANENT DITCHES By KEH Chk By
DETERMINE TEMPORARY LINER
APPROACH: Channel Design calculated using NORMAL DEPTH procedure.
Velocity is checked to see if Temporary Liner is required. If required, 2 year storm is used for design.
Shear Stress is then compared to Permissable Shear Stress allowed.
PROPOSED CHANNEL: PDA
DRAINAGE AREA: 0.12
MAX SHEAR Td allowed: 1.45
AVERAGE SLOPE: 1.40 %
VELOCITY CHECK of Channel Design using Manning of 0.02 (Bare Earth)
Calculated VELOCITY of 2.33 is GREATER THAN 2 Feet per second
TEMPORARY LINER REQUIRED (USING 2 YEAR STORM FOR DESIGN)
PROPOSED LINER: STRAW WITH NET
*MANNINGS (n) of 0.065 used for design
DISCHARGE**
DEPTH
VELOCITY
Calculated Shear
Q (cfs)
d (ft)
v (f/s)
(Td) ****
0.37
0.34
0.92
0.30
Calculated shear of 0.30 is less than the Permissable Shear*** of 1.45
Therefore STRAW WITH NET can be used as a temporary liner for PD-1
"Mannings Coefficient obtained from Table 8.05e
"RATIONAL METHOD USED TO DETERMINE DISCHARGE
O=CIA Where C= 0.5 1= 7.78 in/hr for channel design,Tc= 5.0 min
1= 6.1 in/hr for 2 year storm REF: NOAA Atlas 14 Data
—Permissable Shear Stress Td obtained from Table 8.05g
—**Td=yds Where T=Shear Stress(lb/sq ft), y=unit wt of water, (62.4lb/cubic ft), d=flow depth(ft), s=slope(ft/ft)
Tables From the NC Erosion & Sediment Control Manual (unless otherwise noted)

Job Name Mini Storage USA Job No.
Subject PERMANENT DITCHES
DETERMINE GRASS LINER
PROPOSED GRASS LINER: TALL FESCUE
Use Retardence Class D
Date 12/8/2021 Sheet
By KEH Chk By
APPROACH: Channel Design calculated using NORMAL DEPTH procedure.
Calculated VELOCITY is compared to MAXIMUM VELOCITY allowed for liner.
Calculated VR is then compared to Fig. 8.05c to determine if design is within range for prop.RETARDENCE CLASS
PROPOSED CHANNEL: PDA
AVERAGE SLOPE:
1.40 %
MAX VELOCITY allowed:
4.50 feet/sec
MANNING'S (n) used:
0.045
MAX VR allowed:
2.2
7 d
M
b
DISCHARGE
FLOW
WETTED
CRITICAL
DEPTH Side Slope Bottom VELOCITY Q=CIA
AREA
PERIMETER
DEPTH FROLIDE
(d) ft ft/ft Width (ft) V (f/s) Q(10) (cfs)
(sq ft)
(ft)
(ft) No. Fr VR
0.32 2 0.5 1.28 0.47
0.36
1.93
0.22 0.50 0.24
FLOW IS SUBCRITICAL
VELOCITY CHECK
Calculated velocity of 1.28 feet/sec is less than permissable velocity of 4.50 feet/sec
VR CHECK
Calculated VR 0.24 is less than the maximum allowable VR of 2.2
Therefore TALL FESCUE can be used as a grass liner for PD-1
"Permissable Velocity Obtained from Table 8.05a
"'VR = Velocity' Hydraulic Radius = Velocity' Flow Area/Wetted Perimeter
Tables From the NC Erosion & Sediment Control Manual (unless otherwise noted)

Job Name Mini Storage USA Job No. Date 12/8/2021 Sheet
Subject PERMANENT DITCHES By KEH Chk By
DETERMINE TEMPORARY LINER
APPROACH: Channel Design calculated using NORMAL DEPTH procedure.
Velocity is checked to see if Temporary Liner is required. If required, 2 year storm is used for design.
Shear Stress is then compared to Permissable Shear Stress allowed.
PROPOSED CHANNEL: PD-2
DRAINAGE AREA: 0.02 Acres
MAX SHEAR Td allowed: 1.45
AVERAGE SLOPE: 2.50 %
VELOCITY CHECK of Channel Design using Manning of 0.02 (Bare Earth)
Calculated VELOCITY of 1.68 is LESS THAN 2 Feet per second
TEMPORARY LINER NOT REQUIRED
'Mannings Coefficient obtained from Table 8.05e
"RATIONAL METHOD USED TO DETERMINE DISCHARGE
O=CIA Where C= 0.5 1= 7.78 in/hr for channel design,Tc= 5 min
1= 6.1 in/hr for 2 year storm REF: NOAA Atlas 14 Data
—Permissable Shear Stress Td obtained from Table 8.05g
—**Td=yds Where T=Shear Stress(lb/sq ft), y=unit wt of water, (62.4lb/cubic ft), d=flow depth(ft), s=slope(ft/ft)
Tables From the NC Erosion & Sediment Control Manual (unless otherwise noted)

Job Name Mini Storage USA Job No.
Subject PERMANENT DITCHES
DETERMINE GRASS LINER
PROPOSED GRASS LINER: TALL FESCUE
Use Retardence Class D
Date 12/8/2021 Sheet
By KEH Chk By
APPROACH: Channel Design calculated using NORMAL DEPTH procedure.
Calculated VELOCITY is compared to MAXIMUM VELOCITY allowed for liner.
Calculated VR is then compared to Fig. 8.05c to determine if design is within range for prop.RETARDENCE CLASS
PROPOSED CHANNEL: PD-2
AVERAGE SLOPE:
2.50 %
MAX VELOCITY allowed:
4.50 feet/sec
MANNING'S (n) used:
0.045
MAX VR allowed:
2.2
1 d
M
b
DISCHARGE
FLOW
WETTED
CRITICAL
DEPTH Side Slope Bottom VELOCITY Q=CIA
AREA
PERIMETER
DEPTH FROLIDE
(d) ft ft/ft Width (ft) V (f/s) Q(10) (cfs)
(sq ft)
(ft)
(ft) No. Fr VR
0.12 2 0.5 0.96 0.08
0.08
1.00
0.08 0.59 0.08
FLOW IS SUBCRITICAL
VELOCITY CHECK
Calculated velocity of 0.96 feet/sec is less than permissable velocity of 4.50 feet/sec
VR CHECK
Calculated VR 0.08 is less than the maximum allowable VR of 2.2
Therefore TALL FESCUE can be used as a grass liner for PD-2
"Permissable Velocity Obtained from Table 8.05a
"'VR = Velocity' Hydraulic Radius = Velocity' Flow Area/Wetted Perimeter
Tables From the NC Erosion & Sediment Control Manual (unless otherwise noted)

STORMWATER MANAGEMENT
CALCULATIONS

Job: Mini Storage USA Job No.
Subject: Stream Class
Date 12/15/2021 Sheet
By KEH Chk By
s
N Wrison Sl
3
----------
74 - - - - - - - - - - - -
- - - � - - _ - - - - - •- .- -- -
N on'r'de-'s Wingate
F1ti9hw ay�i'�;��
Fa m tly Cn
ooLlar
w
Cn
� Hirton S1
Food
Lion
C
n
3
LL
1
G
Gy
Ga,rn,
�
Surface Water Classifications:
Sum a rn Index:
13-17-3 ' -8
Stream Name:
Rays Fork
SQiPtlBn:
PrOCn so unre t6
"-
Richardson Creek
- - '-
- Clasai=Fca6on:
C
f
i
_ ;
Qaie Of Oars.:,
August 31 1974
•,
What does thisCless.
More info
'
mean?
RwarBasin:
Yadkin Pee -Dee
J'
Zoam bo
...
_
56aIF-
Hiays Fork
.+
r.

21,230sf (0.487ac) = Woods (Fair)
39,480sf (0.906ac) = Open Space
3,130sf (0.072ac) = Ex. Buildings
390sf (0.009ac) = Ex Gravel
1,900sf (0.044ac) = Ex Asphalt/Curb
r � 66,130sf (1.518ac) _
� � 1
1 � 1
1 \ 1
1 \ 1
1 \ 1
1 \
1 DRAINAGE
1 \ 1 BOUNDARY
SCM
1 1
Total
AREA
TO FINAL
Pre-Develoaed Condition Scale 1" = 50'

DRAINAGE AREA
Scale 1 if = 50'

Job: Mini Storage USA Job No. Date 2/12/2022 Sheet
Subject: Tc Calcs By KEH Chk By
Predevelooed Drainaae Area 66.130sf = 1.518ac
PRE -DEVELOPED
SHEET FLOW
Segment ID:
A
Surface description:
Asphalt (Hwy 74)
Manning's roughness coeff., n:
0.011
Flow length, L (total L<300') (ft):
65.00
2yr 24 hour rainfall, P (in):
3.64
NOAA Atlas 14
Land slope, s (ft/ft):
0.020
Tc= 0.007 (nL) 10.8 1
0.01
hours
P10.5 x s10.4
SHALLOW CONCENTRATED FLOW
Segment ID:
B
Flow length, L (ft):
360.00
Watercourse slope, s (ft/ft):
0.033
(568-556)/360
Average velocity, V (fig3-5) (ft/s):
3.00
Tc= L / (3600xV) 1
0.033
hours
CHANNEL FLOW
Segment ID:
C
Assume velocity, V (ft/s):
7.00
Flow length, L (ft):
145.00
Tc= L / (3600xV) 1
0.006
hours
Total Tc path =
0.053
hours = 3.2 minutes
POST DEVELOPED
ASSUME Tc = 0.1 HR
USE Tc=5min for Analysis
Total Tc path = 0.100 hours = 6.0 minutes
USE Tc= 5min for Analysis

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NCDOT EROSION CONTROL MANUAL
Table 8,03h Roughness
coefficients �Manning's nj
for sheet flow
Surface description
n'
Smoahsurrace (Concrete, asphalt, gravel, or bare
0.011
soil)
Fallow (na residue) ................................................
0.05
Gultivated snits,.
Residue oovw 5 20%...---------------------------------------
0.06
Residue Carer x 20%...........................................
0.17
Grass:
Short grass prairies .....-------------------------------.........
0.15
Dense grassesl----------------------------------------------------
0.24
BerrnmWrass......---------------------------------------------....
0.41
Range (nutral) ...............------------------------------------------
0.13
Woods: 3
Light underbrush ...................-----------------------......-- 0.40
Ccnse underbrush ................-----------------------.....--- 0.80
'i the n ymum are a conpos#mof wrk mabm oompSea by Ffognm (ftW).
L Irduam specm arch as weepng kmega m, Huegrasa, auffmc grasa, due grams
grass, sore nerve grass momires
3 Wimn adec" n , omm aer cover to a hegm ofabms 0.1 X ilm m me only pm t d
MS plant Cover rret wi OMW= shell it err.

Project Name:
Project No.:
Sheet Title:
Calculated By:
Date:
Mini Storage USA
Runoff Curve Number
KEH
2/ 12/2022
SOIL CONDITION: BuB(Badin-Urban) Hydraulic Condition "C"
PRE -DEVELOPED (DA = 66,130 sf = 1.518 ac)
Hydrologic Soil
Group
Cover
Description
CN no.
Area
SF
Area
AC
Product of
CN x Area
C
Woods (Fair)
73
21230
0.487
35.58
C
Open Area (Good Cond.)
74
39480
0.906
67.07
C
Impervious (Building)
98
3130
0.072
7.04
C
Impervious (Gravel Drive)
96
390
0.009
0.86
C
Impervious (Exist Asphalt/Curb)
98
1900
0.044
4.27
CN number=
POST -DEVELOPED (SCM Coverage DA = 66,130sf = 1.518 ac)
Totals= 66130
76
1.52 114.82
Hydrologic Soil
Group
Cover
Description
CN no.
Area
SF
Area
acres
Product of
CN x Area
C
New Buildings
98
21850
0.502
49.16
C
New Gravel
89
30860
0.708
63.05
C
New Sidewalk & Walkways
98
950
0.022
2.14
C
New Conc Paving(ADA Parking)
98
320
0.007
0.72
C
New Asphalt/Curb
98
1120
0.026
2.52
C
Existing Asphalt/Curb
98
1730
0.040
3.89
C
Open Area (Good Cond.)
74
9300
0.213
15.80
Totals= 66130
CN number= 90
1.52 137.28

Job: Mini Storage USA Job No. Date 2/12/2022 Sheet
Subject: Rev Stormwater Management Control Summary By KEH Chk By
CONTROLLED AREA RUNOFF ANALYSIS
Design
Discharge
Pre—Devel.
Runoff
Controlled Post Developed
Total
Peak Flow
Peak
Elevation
1 " Storm
0.02 cfs
558.26
Q(1)
2.89 cfs
2.12 cfs
559.58
Q(2)
4.15 cfs
4.53 cfs
559.76
Q(10)
7.86 cfs
9.03 cfs
560.05
Q(50)
12.22 cfs
12.09 cfs
560.33
Q(100)
14.32 cfs
13.82cfs
560.45
Ref. HydroCad Analysis

PRE
Subcat Reach on Link

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Page 2
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Rainfall Events Listing (selected events)
Event# Event Storm Type Curve Mode Duration B/B Depth AMC
Name (hours) (inches)
1 1yr
Type II 24-hr
Default
24.00
1
3.02 2
2 2yr
Type II 24-hr
Default
24.00
1
3.64 2
3 10yr
Type II 24-hr
Default
24.00
1
5.32 2
4 50yr
Type II 24-hr
Default
24.00
1
7.20 2
5 100yr
Type II 24-hr
Default
24.00
1
8.09 2
6 Custom
Type II 24-hr
Default
24.00
1
8.09 2

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 3
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Area Listing (all nodes)
Area
(acres)
CN
Description
(subcatchment-numbers)
0.906
74
>75% Grass cover, Good, HSG C (1S)
0.009
89
Gravel surface, HSG C (1S)
0.044
98
Paved parking, HSG C (1S)
0.072
98
Roofs, HSG C (1S)
0.487
73
Woods, Fair, HSG C (1S)
1.518
76
TOTAL AREA

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type 1124-hr 1 yr Rainfall=3.02"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 4
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 1S: PRE
Runoff = 2.89 cfs @ 11.97 hrs, Volume= 0.130 af, Depth= 1.03"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr lyr Rainfall=3.02"
Area (sf) CN Description
21,230 73 Woods, Fair, HSG C
39,480 74 >75% Grass cover, Good, HSG C
3,130 98 Roofs, HSG C
390 89 Gravel surface, HSG C
1,900 98 Paved parking, HSG C
66,130 76 Weighted Average
61,100 92.39% Pervious Area
5,030 7.61% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type 1124-hr 1 yr Rainfall=3.02"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 5
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 1S: PRE
Hydrograph
II--
3 2.8s cfs
Type 0 �4ih r
1yr Rainfallr3.0211'
R'Iu hoff'I Allrea=66,I11 W sf
I
2 IRlIlu 1 g1ffIIIVIIotume=10.II113OIIIof
Fkulnoff 0epth-1.031111'
LL
T'q-54 n lin
— —I — — —F — — L
—I— —I —I —I— —I— I —I— 0—
I I I I I I I I I I I I I I I I I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
■ Runoff

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type 1124-hr 2yr Rainfall=3.64"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 6
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 1S: PRE
Runoff = 4.15 cfs @ 11.97 hrs, Volume= 0.186 af, Depth= 1.47"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 2yr Rainfall=3.64"
Area (sf) CN Description
21,230 73 Woods, Fair, HSG C
39,480 74 >75% Grass cover, Good, HSG C
3,130 98 Roofs, HSG C
390 89 Gravel surface, HSG C
1,900 98 Paved parking, HSG C
66,130 76 Weighted Average
61,100 92.39% Pervious Area
5,030 7.61% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type 11 24-hr 2yr Rainfall=3.64"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 7
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 1S: PRE
Hydrograph
4.15 cfs
4LI----,I — --,L -- —L — ------ ,I — �I-- L i L —
ple
2ylr Raiinfallr3.6141I'
'lWsf_
3 IFlIIunolffIIIVIIoIIIIump=10.II11$61IIof
kulnoff be�Ipth=11 Ar7'I'
o - --
---r---- ,--'r-t---r-I-------------r-------rt-, - --
LL 2 TC*5A M [h
III III III III III III III III III III III III III III III III III III III III III II II �N=;7C
-1_�-_I--L- �-�-�--IL_1II1IIL_1II1_�--I�-1I__I--L-
� IIII IIIIIIIIIIIIIIIIIIIIIII
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
■ Runoff

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type // 24-hr 10yr Rainfall=5.32"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 8
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 1S: PRE
Runoff = 7.86 cfs @ 11.96 hrs, Volume= 0.354 af, Depth= 2.80"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 10yr Rainfall=5.32"
Area (sf) CN Description
21,230 73 Woods, Fair, HSG C
39,480 74 >75% Grass cover, Good, HSG C
3,130 98 Roofs, HSG C
390 89 Gravel surface, HSG C
1,900 98 Paved parking, HSG C
66,130 76 Weighted Average
61,100 92.39% Pervious Area
5,030 7.61% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type/1 24-hr 10yr Rainfall=5.32"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 9
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 1S: PRE
Hydrograph
-
L-L--I- -L---'--L-L-L--I--L-L--'--IL -L--'--I--L-L--'--'--L- --I--L-1--'--'--L-
$ 7.ggCfS
Type 0 �4ih r
10yr Ra►infarllr5.327
- - ---- - --' -+---'--+- --' +-- Ruhdff'A�r6&6`6 130'sf-
s �I
5 kulnoff be�lpth=2.80"
0 4 T'cT5160� Mill
LL
_
3 -
-_F -- -r- __F_ ---- --- T r-7 T- --I-- - r-
2
1 I I I I I I I I I I I I I I I I I I I I I I I I I I I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
■ Runoff

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type // 24-hr 50yr Rainfall=7.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 10
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 1S: PRE
Runoff = 12.22 cfs @ 11.96 hrs, Volume= 0.561 af, Depth= 4.44"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 50yr Rainfall=7.20"
Area (sf) CN Description
21,230 73 Woods, Fair, HSG C
39,480 74 >75% Grass cover, Good, HSG C
3,130 98 Roofs, HSG C
390 89 Gravel surface, HSG C
1,900 98 Paved parking, HSG C
66,130 76 Weighted Average
61,100 92.39% Pervious Area
5,030 7.61% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type 11 24-hr 50yr Rainfall=7.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 11
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 1S: PRE
Hydrograph
� - �,--�--�-- �, - �,--�--�, - �,--�--�-- �,--�--�-- �, - �, --�-- �, - �,--�--�-- �,--�--�-- �, - �,--�--�, - �, --�-- ■Runoff
13
11 +12.
——-----------+------------------�--O—�--r—_----_—_----_—_ —_--
-�p►
11
RainfalLr7,20'--
10- +---- I— - -I -+ - +—----— --- —I--+--lfh6#+Area�C6,130sf -
-IFO
ws
opff
7- 1
-L------'---+--L--1----1---1---1----1--------TL--L--------L-+I --I' -- -+- I --I -T-TLI -1I
s T-T TT TTT
-u�#it
h*-J=- .O-.r--r11�4I r1rT
a, 6 cT
5L22 cfs 1�
-
-
4
—+--I----+—+ —+—+—+--+—+—+--+—+—+----+—+—+--+—+—+--+—+—+—+--+—+—+--
3
-rt----r-+- -r-rt----r-+------r-rt----r-+----r-+-y--r-r-----r-rt-y--
2 I I I I I I I I I I I I I I I I I I I I I I I I I I I
—7--I--I —T——7-7--I--I—T--I--I--T-7----7—T----7—T-7--I—7—-----7-7--
1 I I I I I I I I I I I I I I I I I I I I I I I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type // 24-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 12
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 1S: PRE
Runoff = 14.32 cfs @ 11.96 hrs, Volume= 0.663 af, Depth= 5.24"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 100yr Rainfall=8.09"
Area (sf) CN Description
21,230 73 Woods, Fair, HSG C
39,480 74 >75% Grass cover, Good, HSG C
3,130 98 Roofs, HSG C
390 89 Gravel surface, HSG C
1,900 98 Paved parking, HSG C
66,130 76 Weighted Average
61,100 92.39% Pervious Area
5,030 7.61% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type 11 24-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 13
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 1S: PRE
Hydrograph
16-1--1----1-1----L-1------1------L-1----1-1----L-1-1----1-1----L-1-1-- ■Runoff
15 14sz crs
-- ------ ----------------------------------------------------
14 --------------;--- -- ---I--------I-- - --I-----I--- - - -�i�h„pI-Z-r -
--- A sl/[
I
12
11-rt------t---r-rt------t------t-rt----Ruiuff ird&:6613I sf-
�IIIIII IIIIIIIIIII
10 -1--1--I--1-�--L-1--1--I--1--I--I--L-1--IIo--Lu- 1--I--L-V-�o-Jw--I--L-1--I--L3-Y1 o-Jf
--I-I---f�6
F 9-
V--
-
3 8 I I I I I I I I I I I
o I I I I I I-I--r- T --I --- -- --I---
y
E 7 ICjT I, '
6 - ----I-- -- --I------I------I------I---------------I---- -�Y�� -
5
-t----r-t -t -r-t----r-t----r-t-t----r-t----r-t-t--r-r-----r-t-t--
'I
4-1--1--I--1--L-1--1----1------L-1----L-1--I-- -i- ----L-1----L-1-J--
3 �I
7 T- -7-7 T T-7----7-T--I--7-T-7-- -7-7--I--7-7-7--
2 I I I I I I I I-1--1--I--1- I-L-1--1--I--1--I--I--1--1--I--L-1--I--L-1-J--1--I--L-1-1--
1 I I I I I I I I I I I I I I I I I I I I I I I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type 1124-hr Custom Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 14
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 1S: PRE
Runoff = 14.32 cfs @ 11.96 hrs, Volume= 0.663 af, Depth= 5.24"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr Custom Rainfall=8.09"
Area (sf) CN Description
21,230 73 Woods, Fair, HSG C
39,480 74 >75% Grass cover, Good, HSG C
3,130 98 Roofs, HSG C
390 89 Gravel surface, HSG C
1,900 98 Paved parking, HSG C
66,130 76 Weighted Average
61,100 92.39% Pervious Area
5,030 7.61% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Pre -Developed
Rev1_Sand Filter_Pre_011022 Type/1 24-hr Custom Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 15
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 1S: PRE
Hydrograph
16-1--1----1-1----L-1------1------L-1----1-1----L-1-1----1-1----L-1-1-- ■Runoff
15 14sz crs
-- ------ ----------------------------------------------------
14 --------------;--- -----I--;----I--------;--I --II -- I - ---- -I-- - - - i�h„lp-Z-r
13 --
-
-
-^usto -Rainral".191
12
11-rt----I--t---r-rt------t------r-rt----Auhcff ird&:6613I sf-
�IIIIII IIIIIIIIII
-1--1--I--1-�--L-1--1--I--1--I--I--L-1--I--L-1--I--L-�-J--I--L-1--I--L-1-J--
10 ' IOu Offll-V*o�Ilwn�=O,II16 3, of --r----r-r-r --r-r----r-r--I--I--r-r-
V-1__I__I__1-�--L_1__I__I__1__I__I__r_1__I__L_1_
�I I
3 8
o I I I I I I I -r- �--I-------I---
y
E 7 ICjT I, '
-7--I--I--+_�__�_�__I--I--+--I--I--r-�__I--�_+--I--�-r-�--I--�-7--I--�-7-�--
6-I----I-- -- --I------I------I--------I-------------I--I-- II
5
-rt--I--r-t-y-r-rt--I--r-t--I--r-r-rt--I--r-t--I--r-r-y--r-r-�--I--r-rt-y--
'I
4-1--1--I--1--L-1--1----1------L-1----L-1--I-- -r- ----L-1----L-1-J--
3 /I
7 I F T- -7-7 T r-7----7-T--I--7-T-7-- -7-7--I--r-7-7--
2
I-1--1--I--1- I-L-1--1--I--1--I--I--r-�--I--L-1--I--L-1-J--1--L-�--I--L-1-1--
1 I I I I I I I I I I I I I I I I I I I I I I I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Pest
SCM
Subcat Reach on Link

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Page 2
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Rainfall Events Listing (selected events)
Event# Event Storm Type Curve Mode Duration B/B Depth AMC
Name (hours) (inches)
1 1-inch
Type II 24-hr
Default
24.00
1
1.00 2
2 1yr
Type II 24-hr
Default
24.00
1
3.02 2
3 2yr
Type II 24-hr
Default
24.00
1
3.64 2
4 10yr
Type II 24-hr
Default
24.00
1
5.32 2
5 50yr
Type II 24-hr
Default
24.00
1
7.20 2
6 100yr
Type II 24-hr
Default
24.00
1
8.09 2
7 Custom
Type II 24-hr
Default
24.00
1
8.09 2

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 3
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Area Listing (all nodes)
Area
(acres)
CN
Description
(subcatchment-numbers)
0.213
74
>75% Grass cover, Good, HSG C (2S)
0.040
98
Exist Asphalt/Curb (2S)
0.026
98
New Asphalt/Curb (2S)
0.502
98
New Building (2S)
0.007
98
New Concrete Paving (ADA) (2S)
0.708
89
New Gravel (2S)
0.022
98
New Sidewalk / Walkway (2S)
1.518
90
TOTAL AREA

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 1124-hr 1-inch Rainfall=1.00"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 4
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 2S: Post
Runoff = 0.90 cfs @ 11.97 hrs, Volume= 0.041 af, Depth= 0.32"
Routed to Pond 3P : SCM
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 1-inch Rainfall=1.00"
Area (sf) CN Description
21,850
98
New Building
30,860
89
New Gravel
950
98
New Sidewalk / Walkway
320
98
New Concrete Paving (ADA)
1,120
98
New Asphalt/Curb
1,730
98
Exist Asphalt/Curb
9,300
74
>75% Grass cover, Good, HSG C
66,130
90
Weighted Average
40,160
60.73% Pervious Area
25,970
39.27% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 1124-hr 1-inch Rainfall=1.00"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 5
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
N
3
0
LL
Subcatchment 2S: Post
Hydrograph
Type I� �4ihr
14nch Rainfall-0.00"
Ru ho# A';rea=6,6,�130� sf
�u,IOfVol1,�=0.'1 '''''1 ' of
kulnoff be��pth 0.32"
T'cT5,0' rriih
N_g0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
❑ Runoff

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 1124-hr 1-inch Rainfall=1.00"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 6
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 3P: SCM
Inflow Area = 1.518 ac, 39.27% Impervious, Inflow Depth = 0.32" for 1-inch event
Inflow = 0.90 cfs @ 11.97 hrs, Volume=
0.041 of
Outflow = 0.02 cfs @ 15.51 hrs, Volume=
0.041 af, Atten= 97%, Lag= 212.7 min
Primary = 0.00 cfs @ 0.00 hrs, Volume=
0.000 of
Routed to nonexistent node 5L
Secondary = 0.00 cfs @ 0.00 hrs, Volume=
0.000 of
Routed to nonexistent node 5L
Tertiary = 0.02 cfs @ 15.51 hrs, Volume=
0.041 of
Routed to nonexistent node 5L
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 558.26' @ 15.51 hrs Surf.Area= 2,653 sf
Storage= 974 cf
Plug -Flow detention time= 474.3 min calculated for 0.041 of (100% of inflow)
Center -of -Mass det. time= 474.3 min ( 1,332.8 - 858.6 )
Volume
Invert Avail.Storage Storage
Description
#1
557.80'
13,741 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation
Surf.Area
Inc.Store
Cum.Store
(feet)
(sq-ft)
(cubic -feet)
(cubic -feet)
557.80
520
0
0
558.00
2,460
298
298
559.00
3,190
2,825
3,123
560.00
3,990
3,590
6,713
561.00
4,920
4,455
11,168
561.50
5,370
2,573
13,741
Device Routinq Invert Outlet Devices
#1 Primary 555.50' 15.0" Round Culvert
L= 40.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 555.50' / 555.20' S= 0.0075 '/' Cc= 0.900
n= 0.012 Corrugated PP, smooth interior, Flow Area= 1.23 sf
#2 Tertiary 557.80' Top of Washed Stone
Head (feet) 0.00 0.25 0.50 0.75 1.00 2.00 3.00
Disch. (cfs) 0.000 0.023 0.025 0.027 0.029 0.038 0.046
#3 Device 1 559.30' 18.0" W x 8.0" H Vert. Orifice/Grate X 3.00 C= 0.600
Limited to weir flow at low heads
#4 Secondary 560.30' 10.0' long x 10.0' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 1124-hr 1-inch Rainfall=1.00"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 7
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=557.80' (Free Discharge)
L1=Culvert (Passes 0.00 cfs of 7.55 cfs potential flow)
L3=Orifice/Grate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=557.80' (Free Discharge)
L4= Broad -crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.02 cfs @ 15.51 hrs HW=558.26' (Free Discharge)
L2=Top of Washed Stone (Custom Controls 0.02 cfs)
0.02 cfs
10.00 cfs r?
Pond 3P: SCM
Hydrograph
■ Inflow
y�/� C ❑ Outflow
n 1s low
i l rel a= 1 -iJ it 9 ai c ■Primary
,�+� ,,l�,�C �y ■Secondary
hdak�E1dv-538,261 ■Tertiary
$tbraJp=9711 cf
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 1124-hr 1 yr Rainfall=3.02"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 8
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 2S: Post
Runoff = 5.45 cfs @ 11.96 hrs, Volume= 0.253 af, Depth= 2.00"
Routed to Pond 3P : SCM
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr lyr Rainfall=3.02"
Area (sf) CN Description
21,850
98
New Building
30,860
89
New Gravel
950
98
New Sidewalk / Walkway
320
98
New Concrete Paving (ADA)
1,120
98
New Asphalt/Curb
1,730
98
Exist Asphalt/Curb
9,300
74
>75% Grass cover, Good, HSG C
66,130
90
Weighted Average
40,160
60.73% Pervious Area
25,970
39.27% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 1 yr Rainfall=3.02"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 9
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 2S: Post
Hydrograph
g
5.45 cfs
-;-- Ty411-�4--hr-
;-;- ;-!; ;-
5 lyr Rainfallr3.02"
- - ---- - --' - - --' - --' -- uhoff'A4'rsa 66 '130'�f-
IIII IIIIIIIII I II
4 I Rl'lunplff'I Vol'lu^�rums=10-.''1 /$3of
w ; Aull n�/f f-�re�Ipth Ill .0101 I'
3 T'cT5�0�'� Mill
LL
—I--I__T r I—_r
T-
2
L___L_1_J____L_1__I_—IL _1__I__I__L_1__I__I__1_J__I__ L_ 1__I__I__ L_
I I I I I I I I I I I I I I I I I I I I I I I I I I I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
■ Runoff

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 1 yr Rainfall=3.02"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 10
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 3P: SCM
Inflow Area = 1.518 ac, 39.27% Impervious, Inflow Depth = 2.00" for lyr event
Inflow = 5.45 cfs @ 11.96 hrs, Volume=
0.253 of
Outflow = 2.12 cfs @ 12.06 hrs, Volume=
0.242 af, Atten= 61 %, Lag= 5.9 min
Primary = 2.09 cfs @ 12.06 hrs, Volume=
0.118 of
Routed to nonexistent node 5L
Secondary = 0.00 cfs @ 0.00 hrs, Volume=
0.000 of
Routed to nonexistent node 5L
Tertiary = 0.04 cfs @ 12.06 hrs, Volume=
0.124 of
Routed to nonexistent node 5L
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 559.58' @ 12.06 hrs Surf.Area= 3,650 sf
Storage= 5,091 cf
Plug -Flow detention time= 648.8 min calculated for 0.242 of (96% of inflow)
Center -of -Mass det. time= 622.9 min ( 1,428.0 - 805.2 )
Volume
Invert Avail.Storage Storage
Description
#1
557.80'
13,741 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation
Surf.Area
Inc.Store
Cum.Store
(feet)
(sq-ft)
(cubic -feet)
(cubic -feet)
557.80
520
0
0
558.00
2,460
298
298
559.00
3,190
2,825
3,123
560.00
3,990
3,590
6,713
561.00
4,920
4,455
11,168
561.50
5,370
2,573
13,741
Device Routinq Invert Outlet Devices
#1 Primary 555.50' 15.0" Round Culvert
L= 40.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 555.50' / 555.20' S= 0.0075 '/' Cc= 0.900
n= 0.012 Corrugated PP, smooth interior, Flow Area= 1.23 sf
#2 Tertiary 557.80' Top of Washed Stone
Head (feet) 0.00 0.25 0.50 0.75 1.00 2.00 3.00
Disch. (cfs) 0.000 0.023 0.025 0.027 0.029 0.038 0.046
#3 Device 1 559.30' 18.0" W x 8.0" H Vert. Orifice/Grate X 3.00 C= 0.600
Limited to weir flow at low heads
#4 Secondary 560.30' 10.0' long x 10.0' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 1 yr Rainfall=3.02"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 11
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Primary OutFlow Max=2.08 cfs @ 12.06 hrs HW=559.58' (Free Discharge)
L1=Culvert (Passes 2.08 cfs of 10.98 cfs potential flow)
L3=Orifice/Grate (Orifice Controls 2.08 cfs @ 1.68 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=557.80' (Free Discharge)
L4= Broad -crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.04 cfs @ 12.06 hrs HW=559.58' (Free Discharge)
L2=Top of Washed Stone (Custom Controls 0.04 cfs)
Pond 3P: SCM
� ■. .
! - ••
•
.. .' 1 •
P.
/////////////////////////////////
+� ////
-----------------------
1 • 1 • 1 1 . 1 • 1 • : •1

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 1124-hr 2yr Rainfall=3.64"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 12
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 2S: Post
Runoff = 6.92 cfs @ 11.96 hrs, Volume= 0.326 af, Depth= 2.58"
Routed to Pond 3P : SCM
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 2yr Rainfall=3.64"
Area (sf) CN Description
21,850
98
New Building
30,860
89
New Gravel
950
98
New Sidewalk / Walkway
320
98
New Concrete Paving (ADA)
1,120
98
New Asphalt/Curb
1,730
98
Exist Asphalt/Curb
9,300
74
>75% Grass cover, Good, HSG C
66,130
90
Weighted Average
40,160
60.73% Pervious Area
25,970
39.27% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 2yr Rainfall=3.64"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 13
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 2S: Post
Hydrograph
11 6.92 cfs
Type 0 �4ih r
- T--2yr-Rainfafl#164'
5
w - - - -- - - - llunplf,'V'ol,'un�=0.'326', of
- - - - - - unfdeph=:681'- 4 ot2
rrlin-
3 f+1��1 �'I=,A0
- - -- - - -- - -- - - -- - �+--
------------------------
-
-
2
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
■ Runoff

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 2yr Rainfall=3.64"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 14
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 3P: SCM
Inflow Area = 1.518 ac, 39.27% Impervious, Inflow Depth = 2.58" for 2yr event
Inflow = 6.92 cfs @ 11.96 hrs, Volume=
0.326 of
Outflow = 4.53 cfs @ 12.02 hrs, Volume=
0.315 af, Atten= 35%, Lag= 3.9 min
Primary = 4.49 cfs @ 12.02 hrs, Volume=
0.189 of
Routed to nonexistent node 5L
Secondary = 0.00 cfs @ 0.00 hrs, Volume=
0.000 of
Routed to nonexistent node 5L
Tertiary = 0.04 cfs @ 12.02 hrs, Volume=
0.126 of
Routed to nonexistent node 5L
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 559.76' @ 12.02 hrs Surf.Area= 3,797 sf
Storage= 5,773 cf
Plug -Flow detention time= 506.2 min calculated for 0.315 of (96% of inflow)
Center -of -Mass det. time= 485.5 min ( 1,283.5 - 798.0 )
Volume
Invert Avail.Storage Storage
Description
#1
557.80'
13,741 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation
Surf.Area
Inc.Store
Cum.Store
(feet)
(sq-ft)
(cubic -feet)
(cubic -feet)
557.80
520
0
0
558.00
2,460
298
298
559.00
3,190
2,825
3,123
560.00
3,990
3,590
6,713
561.00
4,920
4,455
11,168
561.50
5,370
2,573
13,741
Device Routinq Invert Outlet Devices
#1 Primary 555.50' 15.0" Round Culvert
L= 40.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 555.50' / 555.20' S= 0.0075 '/' Cc= 0.900
n= 0.012 Corrugated PP, smooth interior, Flow Area= 1.23 sf
#2 Tertiary 557.80' Top of Washed Stone
Head (feet) 0.00 0.25 0.50 0.75 1.00 2.00 3.00
Disch. (cfs) 0.000 0.023 0.025 0.027 0.029 0.038 0.046
#3 Device 1 559.30' 18.0" W x 8.0" H Vert. Orifice/Grate X 3.00 C= 0.600
Limited to weir flow at low heads
#4 Secondary 560.30' 10.0' long x 10.0' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 2yr Rainfall=3.64"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 15
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Primary OutFlow Max=4.48 cfs @ 12.02 hrs HW=559.76' (Free Discharge)
L1=Culvert (Passes 4.48 cfs of 11.26 cfs potential flow)
L3=Orifice/Grate (Orifice Controls 4.48 cfs @ 2.17 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=557.80' (Free Discharge)
L4= Broad -crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.04 cfs @ 12.02 hrs HW=559.76' (Free Discharge)
L2=Top of Washed Stone (Custom Controls 0.04 cfs)
Pond 3P: SCM
Hydrograph
■ Inflow
------+-+-+-+-+-+-+-+s-+y�-v+A-,+/-+-r-+-+�-+C-+-f+-+-i-- ❑Outflow
I n 1 o •�r li l rpra= 1 -it it V ai c ■Primary
■ Secondary
+-+-+-+-+-+-+-+-+-+-+-+-,.++.-+-+-+-+-+-+-+-+-+-I--
hdak EI�#v'559,716' ■ Tertiary
-----II- -II -I-
-1 -
I I I �-;- �-�-�- �-�-�-F-F-F-F-F-F-Ir-Ir-I, -II- I--III--III-II-F-;-7-7-7-7-7-7-F-! -! -! -F-! -IIr -IIr -III--III--III- -III--
-III--III--III---1-4-4-1-4-4-4-II -II -II -II -II-F-
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type // 24-hr 10yr Rainfall=5.32"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 16
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 2S: Post
Runoff = 10.88 cfs @ 11.96 hrs, Volume= 0.530 af, Depth= 4.19"
Routed to Pond 3P : SCM
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 10yr Rainfall=5.32"
Area (sf) CN Description
21,850
98
New Building
30,860
89
New Gravel
950
98
New Sidewalk / Walkway
320
98
New Concrete Paving (ADA)
1,120
98
New Asphalt/Curb
1,730
98
Exist Asphalt/Curb
9,300
74
>75% Grass cover, Good, HSG C
66,130
90
Weighted Average
40,160
60.73% Pervious Area
25,970
39.27% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type/1 24-hr 10yr Rainfall=5.32"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 17
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
12
�I
- - -I - - I- - 10.. CfS
11
I I I
10
---I--II -t - 7
9
---1--II -
8-
-1 L I _ _ L
7-
N
6-
0
-----------
LL
5-
4-
3
2
+I
1
I
I I I I
I
I I I i
Subcatchment 2S: Post
Hydrograph
- --I--, - I--I-1-A- R r� PIP
P R ISM[
r-rt----I_-Y------Y----I_ _' _ t--JAI- -0yrefl taiIFFF/i�Y11-;:iIR�-.VY`,IY,_-
IIIIIIII
-+--1--1- _+--I--I--+_+--I-- �r uh6ff Area-- V66, � WV' sf -
- - - - - L - --'�##'IL�o�'I� r�=A-..''IO -
-Ikun I 1 bepth 4.1191I' -
- - --'-- h y}
N =9
- L- L--1--1-- 1--1--1-- L- 1--1-- L-+--1--L -+- J--1-- L- L--1-- L- 1- J--
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)
■ Runoff

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type/1 24-hr 10yr Rainfall=5.32"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 18
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 3P: SCM
Inflow Area = 1.518 ac, 39.27% Impervious, Inflow Depth = 4.19" for 10yr event
Inflow = 10.88 cfs @ 11.96 hrs,
Volume=
0.530 of
Outflow = 9.03 cfs @ 12.00 hrs,
Volume=
0.518 af, Atten= 17%, Lag= 2.6 min
Primary = 8.99 cfs @ 12.00 hrs,
Volume=
0.387 of
Routed to nonexistent node 5L
Secondary = 0.00 cfs @ 0.00 hrs,
Volume=
0.000 of
Routed to nonexistent node 5L
Tertiary = 0.04 cfs @ 12.00 hrs,
Volume=
0.130 of
Routed to nonexistent node 5L
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 560.05' @ 12.00 hrs Surf.Area= 4,034 sf Storage= 6,901 cf
Plug -Flow detention time= 321.3 min calculated for 0.518 of (98% of inflow)
Center -of -Mass det. time= 307.8 min ( 1,092.2 - 784.5 )
Volume
Invert Avail.Storage Storage
Description
#1
557.80'
13,741 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation
Surf.Area
Inc.Store
Cum.Store
(feet)
(sq-ft)
(cubic -feet)
(cubic -feet)
557.80
520
0
0
558.00
2,460
298
298
559.00
3,190
2,825
3,123
560.00
3,990
3,590
6,713
561.00
4,920
4,455
11,168
561.50
5,370
2,573
13,741
Device Routinq Invert Outlet Devices
#1 Primary 555.50' 15.0" Round Culvert
L= 40.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 555.50' / 555.20' S= 0.0075 '/' Cc= 0.900
n= 0.012 Corrugated PP, smooth interior, Flow Area= 1.23 sf
#2 Tertiary 557.80' Top of Washed Stone
Head (feet) 0.00 0.25 0.50 0.75 1.00 2.00 3.00
Disch. (cfs) 0.000 0.023 0.025 0.027 0.029 0.038 0.046
#3 Device 1 559.30' 18.0" W x 8.0" H Vert. Orifice/Grate X 3.00 C= 0.600
Limited to weir flow at low heads
#4 Secondary 560.30' 10.0' long x 10.0' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type/1 24-hr 10yr Rainfall=5.32"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 19
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Primary OutFlow Max=8.99 cfs @ 12.00 hrs HW=560.05' (Free Discharge)
L1=Culvert (Passes 8.99 cfs of 11.70 cfs potential flow)
L3=Orifice/Grate (Orifice Controls 8.99 cfs @ 3.00 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=557.80' (Free Discharge)
L4= Broad -crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.04 cfs @ 12.00 hrs HW=560.05' (Free Discharge)
L2=Top of Washed Stone (Custom Controls 0.04 cfs)
'Vol,0
Pond 3P: SCM
Hydrograph
■ Inflow
-----------
-----+-+
�r ran
f+-+-+- ❑Outflow
H11 li 1`i AF.IiaC��V -ai e - ■ Primary
■ Secondary
■Tertiary
-- +- - torragp=,9,0 c -
----------------
--,--�,--�,--�,--�,--�,--�,--� _- _ - -J- --1-1-1-1-L-1- -L-
-----------------I- -I - - - -
- - - - - - -
-- --
-
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type // 24-hr 50yr Rainfall=7.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 20
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 2S: Post
Runoff = 15.26 cfs @ 11.96 hrs, Volume= 0.762 af, Depth= 6.02"
Routed to Pond 3P : SCM
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 50yr Rainfall=7.20"
Area (sf) CN Description
21,850
98
New Building
30,860
89
New Gravel
950
98
New Sidewalk / Walkway
320
98
New Concrete Paving (ADA)
1,120
98
New Asphalt/Curb
1,730
98
Exist Asphalt/Curb
9,300
74
>75% Grass cover, Good, HSG C
66,130
90
Weighted Average
40,160
60.73% Pervious Area
25,970
39.27% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 50yr Rainfall=7.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 21
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 2S: Post
Hydrograph
17-L-L -+-LL--1-L—L+--1-L—LL-+--1--�--�-�--1--L-L-L-- ■ RUnoff
16
�I 1526 cfs
15 ;-;--;-;-;--;-;----;-;--' ;-;-- ;-;-- ;-;-;- Ty 1---44�.6 Iv -
14-+------+-+--+-+------+------+-+----+-+--50yr'-Ralrlf II-"T.-GV„--
13 1 L
12 I II II II II II II II II II II I I I I I I--- II I I T I I
-------------------------------------E�uhdff Aireal616i130-sf
11 +i I I I I I I I I I I I I I I I I I I I I I I I I I I I I
-- --;-; --I I I---- I I----;- I 11 lu 4ff'- oll'Iume='0-.17�2- at-
w Ikunoff b6th=6.02�I`_
9
,������ IIIIIIIIIIIIIIIIIIII�II
0 $ —--I--'-- I— I I I I I—'+--'--'I—T_�/TVI._0 Ihi�-
- I I --� - �--I--'� -+--I- I I I I I
LL
'I =Ig
6-1--1----1-L--L-L--1----+------L-L----L-+----L-+-----L-L--- -L
—L- --
5
---------- ------------------------------------------------------
4
3-+----+-+- -+-+------+------+-+----+-+----+-+-+--+-+-+----+-+-+--
2
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type/1 24-hr 50yr Rainfall=7.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 22
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 3P: SCM
Inflow Area = 1.518 ac, 39.27% Impervious, Inflow Depth = 6.02" for 50yr event
Inflow = 15.26 cfs @ 11.96 hrs, Volume=
0.762 of
Outflow = 12.09 cfs @ 12.01 hrs, Volume=
0.750 af, Atten= 21 %, Lag= 2.9 min
Primary = 11.92 cfs @ 12.01 hrs, Volume=
0.615 of
Routed to nonexistent node 5L
Secondary = 0.13 cfs @ 12.01 hrs, Volume=
0.000 of
Routed to nonexistent node 5L
Tertiary = 0.04 cfs @ 12.01 hrs, Volume=
0.134 of
Routed to nonexistent node 5L
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 560.33' @ 12.01 hrs Surf.Area= 4,295 sf
Storage= 8,071 cf
Plug -Flow detention time= 233.8 min calculated for 0.750 of (98% of inflow)
Center -of -Mass det. time= 223.7 min ( 998.4 - 774.7 )
Volume
Invert Avail.Storage Storage
Description
#1
557.80'
13,741 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation
Surf.Area
Inc.Store
Cum.Store
(feet)
(sq-ft)
(cubic -feet)
(cubic -feet)
557.80
520
0
0
558.00
2,460
298
298
559.00
3,190
2,825
3,123
560.00
3,990
3,590
6,713
561.00
4,920
4,455
11,168
561.50
5,370
2,573
13,741
Device Routinq Invert Outlet Devices
#1 Primary 555.50' 15.0" Round Culvert
L= 40.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 555.50' / 555.20' S= 0.0075 '/' Cc= 0.900
n= 0.012 Corrugated PP, smooth interior, Flow Area= 1.23 sf
#2 Tertiary 557.80' Top of Washed Stone
Head (feet) 0.00 0.25 0.50 0.75 1.00 2.00 3.00
Disch. (cfs) 0.000 0.023 0.025 0.027 0.029 0.038 0.046
#3 Device 1 559.30' 18.0" W x 8.0" H Vert. Orifice/Grate X 3.00 C= 0.600
Limited to weir flow at low heads
#4 Secondary 560.30' 10.0' long x 10.0' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 50yr Rainfall=7.20"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 23
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Primary OutFlow Max=11.91 cfs @ 12.01 hrs HW=560.33' (Free Discharge)
L1=Culvert (Passes 11.91 cfs of 12.11 cfs potential flow)
L3=Orifice/Grate (Orifice Controls 11.91 cfs @ 3.97 fps)
Secondary OutFlow Max=0.11 cfs @ 12.01 hrs HW=560.33' (Free Discharge)
L4= Broad -crested Rectangular Weir (Weir Controls 0.11 cfs @ 0.41 fps)
Tertiary OutFlow Max=0.04 cfs @ 12.01 hrs HW=560.33' (Free Discharge)
L2=Top of Washed Stone (Custom Controls 0.04 cfs)
Pond 3P: SCM
OEM
15.26cfs
.51_6 ac
■. .
:1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type // 24-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 24
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 2S: Post
Runoff = 17.32 cfs @ 11.96 hrs, Volume= 0.872 af, Depth= 6.89"
Routed to Pond 3P : SCM
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr 100yr Rainfall=8.09"
Area (sf) CN Description
21,850
98
New Building
30,860
89
New Gravel
950
98
New Sidewalk / Walkway
320
98
New Concrete Paving (ADA)
1,120
98
New Asphalt/Curb
1,730
98
Exist Asphalt/Curb
9,300
74
>75% Grass cover, Good, HSG C
66,130
90
Weighted Average
40,160
60.73% Pervious Area
25,970
39.27% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 25
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 2S: Post
Hydrograph
19 - --I--i - -----i - --I--i -----I--T - --I--F - T--I--i - T--I--i -F - --I--i - --I-- ■ RUnoff
18 �I -I_J_ I_117.32 cfs----'-_I_
-----------------------------------------
----
i `,gyp {'� r
17-I----'--II- --'I-- ----'-- ------'-- ----'-- ---------'- - - .6
I
16 -----'-- - -- -----'------'-- - --'--I
15-------;-- --I-- ------ ----- - - - - = 11O- -y�Ra nfall;:9.09'r =
14 -----'--' - --' -----'--'----'--' - --'---
Ruh Area=661 sf -
13 -----'--' - --' -----'--'----'--' - --' --'-----------'---
�I�� ------'----------
12—II--'--'--f
—' —--'— ' 1i��
I I II I I I
Off
I--'--'--I--'--'--I- - - I unI I be-t�i1$$91
I-I--I--i -I I I I I I I I I I I__ I ��10 I I I I I I I I I I I I I I I--------------------------0 9�-'� - �'I--'--'-- �'II I ---- - --------------------N6-I---------------'--'- -'--'----'--'---'--'- -I--'--'-'-'--5------—'—'--'--'--'''''''—'I4 -----'---' - ----'--' ------'-----'-'----'-'-----'-----'--'--
,I I I I I I I I I 8 '---'--'---' -----'--',2 --------' -----'
--'----'--' - --'--' -'----' --'----'--' -----'-- --'--
,1
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type/1 24-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 26
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 3P: SCM
Inflow Area = 1.518 ac, 39.27% Impervious, Inflow Depth = 6.89" for 100yr event
Inflow = 17.32 cfs @ 11.96 hrs, Volume=
0.872 of
Outflow = 13.82 cfs @ 12.00 hrs, Volume=
0.860 af, Atten= 20%, Lag= 2.9 min
Primary = 12.29 cfs @ 12.00 hrs, Volume=
0.717 of
Routed to nonexistent node 5L
Secondary = 1.49 cfs @ 12.00 hrs, Volume=
0.008 of
Routed to nonexistent node 5L
Tertiary = 0.04 cfs @ 12.00 hrs, Volume=
0.136 of
Routed to nonexistent node 5L
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 560.45' @ 12.00 hrs Surf.Area= 4,411 sf
Storage= 8,613 cf
Plug -Flow detention time= 208.0 min calculated for 0.860 of (99% of inflow)
Center -of -Mass det. time= 199.4 min ( 970.6 - 771.2 )
Volume
Invert Avail.Storage Storage
Description
#1
557.80'
13,741 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation
Surf.Area
Inc.Store
Cum.Store
(feet)
(sq-ft)
(cubic -feet)
(cubic -feet)
557.80
520
0
0
558.00
2,460
298
298
559.00
3,190
2,825
3,123
560.00
3,990
3,590
6,713
561.00
4,920
4,455
11,168
561.50
5,370
2,573
13,741
Device Routinq Invert Outlet Devices
#1 Primary 555.50' 15.0" Round Culvert
L= 40.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 555.50' / 555.20' S= 0.0075 '/' Cc= 0.900
n= 0.012 Corrugated PP, smooth interior, Flow Area= 1.23 sf
#2 Tertiary 557.80' Top of Washed Stone
Head (feet) 0.00 0.25 0.50 0.75 1.00 2.00 3.00
Disch. (cfs) 0.000 0.023 0.025 0.027 0.029 0.038 0.046
#3 Device 1 559.30' 18.0" W x 8.0" H Vert. Orifice/Grate X 3.00 C= 0.600
Limited to weir flow at low heads
#4 Secondary 560.30' 10.0' long x 10.0' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 27
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Primary OutFlow Max=12.29 cfs @ 12.00 hrs HW=560.45' (Free Discharge)
L1=Culvert (Inlet Controls 12.29 cfs @ 10.01 fps)
L3=Orifice/Grate (Passes 12.29 cfs of 12.97 cfs potential flow)
Secondary OutFlow Max=1.46 cfs @ 12.00 hrs HW=560.45' (Free Discharge)
L4= Broad -crested Rectangular Weir (Weir Controls 1.46 cfs @ 0.97 fps)
Tertiary OutFlow Max=0.04 cfs @ 12.00 hrs HW=560.45' (Free Discharge)
L2=Top of Washed Stone (Custom Controls 0.04 cfs)
i
O_77777777711-
j
Time (hours)
■ Inflow
❑ Outflow
■ Primary
■ Secondary
■ Tertiary

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 1124-hr Custom Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 28
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Subcatchment 2S: Post
Runoff = 17.32 cfs @ 11.96 hrs, Volume= 0.872 af, Depth= 6.89"
Routed to Pond 3P : SCM
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Type II 24-hr Custom Rainfall=8.09"
Area (sf) CN Description
21,850
98
New Building
30,860
89
New Gravel
950
98
New Sidewalk / Walkway
320
98
New Concrete Paving (ADA)
1,120
98
New Asphalt/Curb
1,730
98
Exist Asphalt/Curb
9,300
74
>75% Grass cover, Good, HSG C
66,130
90
Weighted Average
40,160
60.73% Pervious Area
25,970
39.27% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type/1 24-hr Custom Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 29
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Subcatchment 2S: Post
Hydrograph
19 - --I--i - -----i - --I--i -----I--T - --I--F - T--I--i - T--I--i -F - --I--i - --I-- ■ RUnoff
18 �I-I-J_ I_117.32 cfs----'-_I_
-----------------------------------------
----
i {'� r
17-II----'--II- --'I-- ----'-- ------' ------' -----------'--71`��- - .6
16 -----'-- - -- -----'------'-- - --I
CIu©rri Raiirifalfr8�.9'r-
14 -----'--' - --' -----'--'----'--' - --'---
R-uh --A-rea-66-1-------s—f---
—
13 ' '�'' '
------------ ---
----'II'- ---------'I'II --- ---'I'I'I
--- ----I'I'I----- -----II'I ---------- 'II ----- -----I'I'I -_--- �----
=i—I'I c-----�—
12�
I —II--I I --I I— —I I I I
Off
I -'-'--'-'-I- nI I bet --III -�---i10 I -I I I I i I I I I I I I I I I I I u$----$
9-f--- .l�-----�1
0 9 ----- - -- ----------------
N----
6 5 --I- - --
4 -- ' ' ' '
,I- ----- ------------'--'---'--'-'----'-'---'--'-----'--'
lF-----
-
-
-
—
-
-
8
' - I -I -I'- I
2 ,-
,1 -- -------''--'' -- ---''--'' --''-----''----''-----''--'' ------'-'-- ----''---
-
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60
Time (hours)

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type 11 24-hr Custom Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD® 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 30
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Summary for Pond 3P: SCM
Inflow Area = 1.518 ac, 39.27% Impervious, Inflow Depth = 6.89" for Custom event
Inflow = 17.32 cfs @ 11.96 hrs, Volume=
0.872 of
Outflow = 13.82 cfs @ 12.00 hrs, Volume=
0.860 af, Atten= 20%, Lag= 2.9 min
Primary = 12.29 cfs @ 12.00 hrs, Volume=
0.717 of
Routed to nonexistent node 5L
Secondary = 1.49 cfs @ 12.00 hrs, Volume=
0.008 of
Routed to nonexistent node 5L
Tertiary = 0.04 cfs @ 12.00 hrs, Volume=
0.136 of
Routed to nonexistent node 5L
Routing by Stor-Ind method, Time Span= 0.00-60.00 hrs, dt= 0.01 hrs
Peak Elev= 560.45' @ 12.00 hrs Surf.Area= 4,411 sf
Storage= 8,613 cf
Plug -Flow detention time= 208.0 min calculated for 0.860 of (99% of inflow)
Center -of -Mass det. time= 199.4 min ( 970.6 - 771.2 )
Volume
Invert Avail.Storage Storage
Description
#1
557.80'
13,741 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation
Surf.Area
Inc.Store
Cum.Store
(feet)
(sq-ft)
(cubic -feet)
(cubic -feet)
557.80
520
0
0
558.00
2,460
298
298
559.00
3,190
2,825
3,123
560.00
3,990
3,590
6,713
561.00
4,920
4,455
11,168
561.50
5,370
2,573
13,741
Device Routinq Invert Outlet Devices
#1 Primary 555.50' 15.0" Round Culvert
L= 40.0' CPP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 555.50' / 555.20' S= 0.0075 '/' Cc= 0.900
n= 0.012 Corrugated PP, smooth interior, Flow Area= 1.23 sf
#2 Tertiary 557.80' Top of Washed Stone
Head (feet) 0.00 0.25 0.50 0.75 1.00 2.00 3.00
Disch. (cfs) 0.000 0.023 0.025 0.027 0.029 0.038 0.046
#3 Device 1 559.30' 18.0" W x 8.0" H Vert. Orifice/Grate X 3.00 C= 0.600
Limited to weir flow at low heads
#4 Secondary 560.30' 10.0' long x 10.0' breadth Broad -Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64

Mini Storage USA Sand Filter Post -Developed
Rev1_Sand Filter_Post_011022 Type/1 24-hr Custom Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HvdroCADO 10.10-7a Sampler s/n S17943 © 2021 HydroCAD Software Solutions LLC Paae 31
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Primary OutFlow Max=12.29 cfs @ 12.00 hrs HW=560.45' (Free Discharge)
L1=Culvert (Inlet Controls 12.29 cfs @ 10.01 fps)
L3=Orifice/Grate (Passes 12.29 cfs of 12.97 cfs potential flow)
Secondary OutFlow Max=1.46 cfs @ 12.00 hrs HW=560.45' (Free Discharge)
L4= Broad -crested Rectangular Weir (Weir Controls 1.46 cfs @ 0.97 fps)
Tertiary OutFlow Max=0.04 cfs @ 12.00 hrs HW=560.45' (Free Discharge)
L2=Top of Washed Stone (Custom Controls 0.04 cfs)
i
O_77777777711-
j
Time (hours)
■ Inflow
❑ Outflow
■ Primary
■ Secondary
■ Tertiary

Rev1_Sand Filter_ Post_011022 Type 1124-hr 100yr Rainfall=8.09"
Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Printed 2/11/2022
HydroCAD®10.10-7a Sampler sln S17943 ©2021 HydroCAD Software Solutions LLC
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling applications you MUST use a full version of
HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical
support,training materials, and additional features which are essential for actual design work.
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
Top of Washed 557.80
520
0
Stone 557.81
617
6
557.82
714
12
557.83
811
20
557.84
908
29
557.85
1,005
38
557.86
1,102
49
557.87
1,199
60
557.88
1,296
73
557.89
1,393
86
557.90
1,490
101
557.91
1,587
116
557.92
1,684
132
557.93
1,781
150
557.94
1,878
168
557.95
1,975
187
557.96
2,072
207
557.97
2,169
229
557.98
2,266
251
557.99
2,363
274
558.00
2,460
298
558.01
2,467
323
558.02
2,475
347
558.03
2,482
372
558.04
2,489
397
558.05
2,496
422
558.06
2,504
447
558.07
2,511
472
558.08
2,518
497
558.09
2,526
522
558.10
2,533
548
558.11
2,540
573
558.12
2,548
598
558.13
2,555
624
558.14
2,562
650
558.15
2,569
675
558.16
2,577
701
558.17
2,584
727
558.18
2,591
753
558.19
2,599
779
558.20
2,606
805
558.21
2,613
831
558.22
2,621
857
558.23
2,628
883
558.24
2,635
909
558.25
2,643
936
Elevation
Surface
Storage
(feet)
(sq-ft)
(cubic -feet)
558.26
2,650
962
558.27
2,657
989
558.28
2,664
1,015
558.29
2,672
1,042
558.30
2,679
1,069
558.31
2,686
1,096
558.32
2,694
1,123
558.33
2,701
1,150
558.34
2,708
1,177
558.35
2,715
1,204
558.36
2,723
1,231
558.37
2,730
1,258
558.38
2,737
1,286
558.39
2,745
1,313
558.40
2,752
1,340
558.41
2,759
1,368
558.42
2,767
1,396
558.43
2,774
1,423
558.44
2,781
1,451
558.45
2,788
1,479
558.46
2,796
1,507
558.47
2,803
1,535
558.48
2,810
1,563
558.49
2,818
1,591
558.50
2,825
1,619
558.51
2,832
1,648
558.52
2,840
1,676
558.53
2,847
1,704
558.54
2,854
1,733
558.55
2,861
1,761
558.56
2,869
1,790
558.57
2,876
1,819
558.58
2,883
1,848
558.59
2,891
1,876
558.60
2,898
1,905
558.61
2,905
1,934
558.62
2,913
1,964
558.63
2,920
1,993
558.64
2,927
2,022
558.65
2,934
2,051
558.66
2,942
2,081
558.67
2,949
2,110
558.68
2,956
2,140
558.69
2,964
2,169
558.70
2,971
2,199
558.71
2,978
2,229

Rev1_San��Filte11022 7yD8024-hr Y00V7R8���=fi0Q"
Prep8r�dbVHVdFOEAD�AMPLEFl1-8OO-027-7240VVVw.hVdFOC8d.nRi Printed 2Y11/2022
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling 8pp|iC8U0nS you MUST use 8fuU version of
Hvdn}CADvvhiCh may be purchased 8tvvvvvv.hvdn}C8d.neL Full pn}gr8rnS also include complete technical
Supp0rt'tr8ining rn8teri8|S' and additional features which are eSSenU8| for actual design work.
Elevation
Surface
Storage
558.32
2.988
2.258
558.73
2.993
2.288
558.74
3.000
2.318
558.75
3.008
2.348
558.78
3.015
2.378
558.77
3.022
2.409
558.78
3.029
2.439
558.79
3.037
2.489
558.80
3.044
2.500
558.81
3.051
2.530
558.82
3.059
2.581
558.83
3.088
2.591
558.84
3.073
2.822
558.85
3.080
2.853
558.88
3.088
2.884
558.87
3.095
2.714
558.88
3.102
2.745
558.89
3.110
2.777
558.90
3.117
2.808
558.91
3.124
2.839
558.92
3.132
2.870
558.93
3.139
2.901
558.94
3.148
2.933
558.95
3.153
2.984
558.98
3.181
2.998
558.97
3.188
3.028
558.98
3.175
3.059
558.99
3.183
3.091
559.00
3.190
3.123
559.01
3.198
3.155
559.02
3.208
3.187
559.03
3.214
3.219
559.04
3.222
3.251
559.05
3.230
3.283
559.08
3.238
3.318
559.07
3.248
3.348
vvQodjo 559.08
3254
3381
559.10
3.270
3.448
559.11
3.278
3.479
559.12
3.288
3.512
559.13
3.294
3.544
559.14
3.302
3.577
559.15
3.310
3.810
559.18
3.318
3.844
559.17
3.328
3.877
Elevation
Surface
Storage
55918
3.334
3.710
559.19
3.342
3.744
559.20
3.350
3.777
559.21
3.358
3.811
559.22
3.388
3.844
559.23
3.374
3.878
559.24
3.382
3.912
559.25
3.390
3.948
559.28
3.398
3.979
559.27
3.408
4.013
559.28
3.414
4.048
559.29
3.422
4.082
559.30
3.430
4.118mpnapBerm /Outlet Weir
559.31
3.438
4.150
559.32
3.448
4.185
559.33
3.454
4.219
559.34
3.482
4.254
559.35
3.470
4.288
559.38
3.478
4.323
559.37
3.488
4.358
559.38
3.494
4.393
559.39
3.502
4.428
559.40
3.510
4.483
559.41
3.518
4.498
vvQvo
559.44
3.542
4.804
559.45
3.550
4.839
559.48
3.558
4.875
559.47
3.588
4.711
559.48
3.574
4.748
559.49
3.582
4.782
559.50
3.590
4.818
559.51
3.598
4.854
559.52
3.808
4.890
559.53
3.814
4.928
559.54
3.822
4.982
559.55
3.830
4.998
559.58
3.838
5.035
559.57
3.848
5.071
559.58
3.854
5.108
559.59
3.882
5.144
559.80
3.870
5.181
559.81
3.878
5.218
559.82
3.888
5.255
559.83
3.894
5.291

Rev1_San��Filte11022 7yD8024-hr Y00V7R8���=fi0Q"
Prep8r�dbVHVdFOEAD�AMPLEFl1-8OO-027-7240VVVw.hVdFOC8d.nRi Printed 2Y11/2022
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling 8pp|iC8U0nS you MUST use 8fuU version of
Hvdn}CADvvhiCh may be purchased 8tvvvvvv.hvdn}C8d.neL Full pn}gr8rnS also include complete technical
Supp0rt'tr8ining rn8teri8|S' and additional features which are eSSenU8| for actual design work.
Elevation
Surface
Storage
559.84
3.702
5.328
559.85
3.710
5.385
559.88
3.718
5.403
559.87
3.328
5.440
559.88
3.734
5.477
559.89
3.742
5.515
559.70
3.750
5.552
559.71
3.758
5.590
559.32
3.788
5.827
559.73
3.774
5.885
559.74
3.782
5.703
559.75
3.790
5.741
559.78
3.798
5.778
559.77
3.808
5.818
559.78
3.814
5.855
559.79
3.822
5.893
559.80
3.830
5.931
559.81
3.838
5.989
559.82
3.848
8.008
559.83
3.854
8.048
559.84
3.882
8.085
559.85
3.870
8.123
559.88
3.878
8.182
559.87
3.888
8.201
559.88
3.894
8.240
559.89
3.902
8.279
559.90
3.910
8.318
559.91
3.918
8.357
559.92
3.928
8.398
559.93
3.934
8.438
559.94
3.942
8.475
559.95
3.950
8.514
559.98
3.958
8.554
559.97
3.988
8.594
559.98
3.974
8.833
559.99
3.982
8.873
580.00
3.990
8.713
580.01
3.999
8.753
580.02
4.009
8.793
580.03
4.018
8.833
580.04
4.027
8.873
580.05
4.038
8.914
580.08
4.048
8.954
580.07
4.055
8.995
580.08
4.084
7.035
580.09
4.074
7.078
Elevation
Surface
Storage
58010
4.083
7.117
580.11
4.092
7.158
580.12
4.102
7.198
580.13
4.111
7.240
580.14
4.120
7.281
580.15
4.129
7.322
580.18
4.139
7.383
580.17
4.148
7.405
580.18
4.157
7.448
580.19
4.187
7.488
580.20
4.178
7.530
580.21
4.185
7.571
580.22
4.195
7.813
580.23
4.204
7.855
580.24
4.213
7.897
580.25
4.223
7.740
580.28
4.232
7.782
580.27
4.241
7.824
580.28
4.250
7.887
580.29
4.280
7.909
580.30
4.289
7.952
580.31
4.278
7.995
580.32
4.288
8.037
580.33
4.297
8.080
580.34
4.308
8.123
580.35
4.315
8.188
580.38
4.325
8.210
580.37
4.334
8.253
580.38
4.343
8.298
580.39
4.353
8.340
580.40
4.382
8.383
580.41
4.371
8.427
580.42
4.381
8.471
580.43
4.390
8.515
580.44
4.399
8.559
580.45
4.408
8.803
580.48
4.418
8.847
580.47
4.427
8.891
580.48
4.438
8.735
580.49
4.448
8.780
580.50
4.455
8.824
580.51
4.484
8.889
580.52
4.474
8.914
580.53
4.483
8.958
580.54
4.492
9.003
580.55
4.501
9.048
Emer Spillway

Rev1_San��Filte11022 7yD8024-hr Y00V7R8���=fi0Q"
Prep8r�dbVHVdFOEAD�AMPLEFl1-8OO-027-7240VVVw.hVdFOC8d.nRi Printed 2Y11/2022
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling 8pp|iC8U0nS you MUST use 8fuU version of
Hvdn}CADvvhiCh may be purchased 8tvvvvvv.hvdn}C8d.neL Full pn}gr8rnS also include complete technical
Supp0rt'tr8ining rn8teri8|S' and additional features which are eSSenU8| for actual design work.
Elevation
Surface
Storage
580.58
4.511
9.093
580.57
4.520
9.138
580.58
4.529
9.184
580.59
4.539
9.229
580.80
4.548
9.274
580.81
4.557
9.320
580.82
4.587
9.388
580.83
4.578
9.411
580.84
4.585
9.457
580.85
4.594
9.503
580.88
4.804
9.549
580.87
4.813
9.595
580.88
4.822
9.841
580.89
4.832
9.887
580.70
4.841
9.734
580.71
4.850
9.780
580.32
4.880
9.827
580.73
4.889
9.873
580.74
4.878
9.920
580.75
4.888
9.987
580.78
4.897
10.014
580.77
4.708
10.081
580.78
4.715
10.108
580.79
4.325
10.155
580.80
4.734
10.203
580.81
4.743
10.250
580.82
4.753
10.297
580.83
4.782
10.345
580.84
4.771
10.393
580.85
4.780
10.440
580.88
4.790
10.488
580.87
4.799
10.538
580.88
4.808
10.584
580.89
4.818
10.832
580.90
4.827
10.881
580.91
4.838
10.329
580.92
4.848
10.777
580.93
4.855
10.828
580.94
4.884
10.874
580.95
4.873
10.923
580.98
4.883
10.932
580.97
4.892
11.021
580.98
4.901
11.070
580.99
4.911
11.119
581.00
4.920
11.188
581.01
4.929
11.217
Elevation
Surface
Storage
581.02
4.938
11.287
581.03
4.947
11.318
581.04
4.958
11.388
581.05
4.985
11.415
581.08
4.974
11.485
581.07
4.983
11.515
581.08
4.992
11.584
581.09
5.001
11.814
581.10
5.010
11.884
581.11
5.019
11.715
581.12
5.028
11.785
581.13
5.037
11.815
581.14
5.048
11.888
581.15
5.055
11.918
581.18
5.084
11.987
581.17
5.073
12.017
581.18
5.082
12.088
581.19
5.091
12.119
581.20
5.100
12.170
581.21
5.109
12.221
581.22
5.118
12.232
581.23
5.127
12.323
581.24
5.138
12.375
581.25
5.145
12.428
581.28
5.154
12.478
581.27
5.183
12.529
581.28
5.132
12.581
581.29
5.181
12.833
581.30
5.190
12.884
581.31
5.199
12.738
581.32
5.208
12.788
581.33
5.217
12.841
581.34
5.228
12.893
581.35
5.235
12.945
581.38
5.244
12.998
581.37
5.253
13.050
581.38
5.282
13.103
581.39
5.271
13.155
581.40
5.280
13.208
581.41
5.289
13.281
581.42
5.298
13.314
581.43
5.307
13.387
581.44
5.318
13.420
581.45
5.325
13.473
581.48
5.334
13.528
581.47
5.343
13.580

Rev1_San��Filte11022 7yD8024-hr Y00V7R8���=fi0Q"
Prep8r�dbVHVdFOEAD�AMPLEFl1-8OO-027-7240VVVw.hVdFOC8d.nRi Printed 2Y11/2022
H C @ Sampler s/n S17943 @2021 HydroCADSoftware Solutions LLC
This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and
educational use ONLY. For actual design or modeling 8pp|iC8U0nS you MUST use 8fuU version of
Hvdn}CADvvhiCh may be purchased 8tvvvvvv.hvdn}C8d.neL Full pn}gr8rnS also include complete technical
Supp0rt'tr8ining rn8teri8|S' and additional features which are eSSenU8| for actual design work.
Elevation
Surface
Storage
581.48
5.352
13.833
581.49
5.381
13.887
581.50
5,370
13,741 Top of Dam

Job: Mini Storage USA, Inc Job No.
Subject: Sand Filter Underdrain Sizing
Date 2/12/2022 Sheet
By KEH Chk By
WQV = 4538 cf
Time to Drain, t = 1.66 days (40 hrs)
Determine Flow Rate through sand
Q(cfs) = WQV / t = 3980 / 1.66 days / 86,400 secs per day = 0.032 cfs
Factor of Safety = 10
Q x Factor of Safety = 0.32 cfs
Determine Minimum diameter of Underdrain, D
* n 8
D ()
where: D r Diameter of single pipe {inches
n - Roughness factor {recommended to he 0.0111
S T internal slope (recommended to be l -5%)
Q = Underdrain design flow (cfs)
Minimum D= 5.17 inches Therefore 6" is sufficient
Table : Number of 6" Pipes Required in the Underdrain
7A4 2
9.11 3
1D_ 13 4
Since D = 5.17 < 7.84 Two 6" lines are required

SUPPORTING
DATA

11/28/21, 2:05 PM Precipitation Frequency Data Server
Atlas 14, Volume 2, Version 3
Location name: Wingate, North Carolina, USA*
0NOAA
Latitude: 34.9818°, Longitude:-80.4569°
Elevation: mKt-
'source: ESRI Maps
'%yw
"source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, T. Parzybok M.Yelda, and D. Riley
NOAA, National Weather Servios, Silver Spring, Maryland
PF tabular I P_cIM hD Ical I Mao & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1
Average
recurrence interval
Duration
�0000
1
2
5
10
25
0
0eare0000
50
100
200
500
1000
0.886
70.918
5-min
0.395-0.467
0.466-0.553
0.5440.641
0.593-0 04
0.65 O..776
0.692-0826
0.727-0872
0.7576--0.914
0.7 9-0964
0.8111 1.00
10-min
0.631-0.746
0.746-0.884
08 65- 03
0.949-14.13
1.0414.24
110-21.32
1. 6-21839
1.2414.45
1.25-1.52
1.28-4158
15-min
1.11
1.12
1.11
1.31
115
1.1
1.62
1.1
1.77
1.11
(0.789-0.932)
(0.938-1.11)
1 (1.09-1.30) 11
(1.20-1.42)
1 (1.32-1.57) 11
(1.40-1.67) 11
(1.46-1.75)
1 (1.52-1.83) 11
(1.57-1.92)
(1.60-1.98)
1.11
1.41
1.71
1.11
2.14
2.31
2.41
2.1
2.11
2.11
30-min
(1.08-1.28)
(1.30-1.54)
(1.55-1.85)
(1.74-2.06)
(1.95-2.32)
(2.10-2.51)
(2.24-2.68)
(2.36-2.85)
(2.503.05)
(2.603.20)
1.47
1.77
2.17
2.47
211
3.14
3.41
3.1
4.13
4.21
60-min
(1.35-1.59)
(1.63-1.93)
(1.99-2.37)
(2.26-2.69)
(2.60-3.09)
(2.853.40)
(3.083.69)
(3.31-3.99)
(3.594.38)
(3.794.67)
1.69
2.05
2.54
2.91
3.39
3.75
1.12
1.48
1.96
5.32
2-hr
(1.55-1.85)
(1.87-2.24)
(2.32-2.77)
(2.653.18)
(3.08-3.9)
(3.394.09)
(3.704.48)
(4.00-4.88)
(4.385.40)
(4.665.81)
3-hr
1.80
(1.64-1.98)
2.17
(1.99-2.39)
2.71
(2.47-2.98)
3.13
(2.843.43)
3.69
(3.33-4.03)
1.13
(3.714.51)
1.57
(4.094.99)
5.03
(4.46-5.49)
5.66
(4.956.18)
6.16
(5.346.74)
2.15
2.60
3.24
3.75
4.44
1.99
5.55
6.13
6.93
7.57
6-hr
(1.97-2.36)
(2.38-2.85)
(2.96-3.56)
(3.424.11)
(4.01-4.84)
(4.485.43)
(4.956.04)
(5.42-6.67)
(6.04-7.53)
(6.526.23)
2.54
3.07
3.85
4.47
5.34
6.04
6.76
7.52
8.59
9.45
12fir
(2.33-2.79)
(2.82-3.38)
(3.52-4.23)
(4.084.91)
(4.83-5.84)
(5.426.59)
(6.01-7.36)
(6.61-8.19)
(7.43-9.34)
(8.06-10.3)
3.02
3.64
4.58
5.32
6.37
7.20
8.09
9.01
10.3
11.4
24fir
(2.783.27)
(3.36-3.95)
(4.22-4.96)
(4.895.77)
(5.82-6.90)
(6.57-7.81)
(7.346.77)
(8.14-9.79) 11
(9.26-11.2)
(10.1-12.4)
2-day
3. 83 85
3.96-4.64
49 35.79
5. 06.70
67 6-7..98
7.61 9?02
8.48-310.1
9.38-11.3
10 6 2.9
11 6-14.2
3-day
3. 94 07
4. 9 4?89
52 0-6 07
5.99-47g01
7.09 8.33
7.97 9g39
8.8710.5
9.80-11.7
11 1-13.4
12 1314.7
3.98
6.7
12.8
a day
3. 04 29
4.43�5.14
5.47 6036
6. 8 7g32
7. 208.67
8.32 9577
9.26-10.9
10.2- 2.1
11 6 13.8
12..74 5.2
4.11
5.41
6.61
7.64
1.17
11.1
11.2
12.3
14.1
15.3
7-day
11
(4.294.91)D�
(5.13-5.87)
(6.25-7.15)
(7.136.18)
(8.35-9.61)
(9.31-10.8)
( 10.3-12.0)
( 11.3-13.2) 11
( 12.8-15.0)
( 13.9-16.5)
5.27
6.28
7.1
1.57
1.11
11.1
12.1
13.3
14.1
16.1
10-day
(4.965.62)
(5.89-6.68)
(7.08-8.05)
(8.02-9.13)
(9.28-10.6)
(10.311.7)
(11.3-12.9)
1 (12.314.2) 11
(13.7-15.9)
(14.8-17.3)
7.11
8.36
1.11
11.1
12.7
14.1
15.3
16.6
11.4
11.1
20-day
(6.69-7.51)
(7.89-8.86)
(9.31-10.5)
(10.4-11.8)
(11.9-13.5)
(13.1-14.9)
(14.3-16.3)
1 (15.5-17.7) 11
(17.1-19.7)
(18.4-21.2)
8.69
10.2
11.9
13.2
14.9
16.3
17.6
18.9
20.6
22.0
30-day
(8.24-9.17)
1 (9.9-10.8)
(11.3-12.6)
(12.5-13.9)
1 (14.1-15.7)
(15.3-17.2) JI
(16.5-18.6)
1 (17.7-20.0) 11
(19.3-21.9)
(20.5-23.4)
10.9
12.8
14.7
16.1
18.0
19.4
20.8
222
24.0
25.3
45-day
(10.4-11.5)
1 (12.2-13.5)
1 (14.0-15.4) 11
(15.3-16.9)
1 (17.1-18.9) 11
(18.4-20.4) 11
(19.7-21.9)
1 (20.9-23.3) 11
(22.5-25.3)
(23.7-26.8)
13.1
15.3
17.3
18.9
20.9
22.4
23.9
25.3
27.1
28.5
60-day
(12.5-13.7)
(14.6-16.0)
(16.5-18.1)
(18.0-19.7)
(19.9-21.8)
(21.3-23.4)
(22.6-25.0)
(24.0-26.5)
(25.6-28.5)
(26.930.0)
Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a
given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%, Estimates at upper bounds are not
checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=34.9818&Ion=-80.4569&data=depth&units=english&series=pds 1/3

11/28/21, 2:05 PM Precipitation Frequency Data Server
Atlas 14, Volume 2, Version 3
Location name: Wingate, North Carolina, USA*
0NOAA
Latitude: 34.9616°, Longitude:-60.4569°
Elevation: mKt-
'source: ESRI Maps
'%yw
"source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, T. Parzybok M.Yelda, and D. Riley
NOAA, National Weather Servios, Silver Spring, Maryland
PF tabular I P_cIM hD Ical I Mao & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1
Duretion
Avera�OOOOge
recurrence interval (years)
1
2
5
10
25
0
50
0
100
0000
200
500
1000
5-
4: 4-5.60
5.598 64
64 8-7.9
7. 28.45
7.82�31
83 0-9.91
8. 2-010.5
9.08 1.0
9.47---111.6
9.73 2.0
10-min
3: 9-4.48
4.485 30
519906.16
5. 98.75
6. 387.42
6.61-27889
6.938 31
7.20 8,9
74 9-9.14
7.66 9?45
3.43
4.11
4.1
5.11
5.11
1.14
6.46
1.11
1.11
1.11
15-min
(3.16-3.73)
(3.75-4.45)
(4.38-5.20)
(4.805.70)
(5.27-6.27)
(5.58-6.66)
(5.84-7.00)
(6.06-7.32)
(6.28-7.67)
(6.41-7.91)
2.35
2.82
3.39
3.80
4.28
4.63
4.95
5.25
5.62
5.88
30-min
(2.16-2.56)
(2.593.07)
(3.11-3.9)
(3.48-4.13)
(3.90-4.64)
(4.20-5.02)
(4.475.36)
(4.72-5.9)
(5.00-6.11)
(5.195.40)
1.47
1.77
2.17
2.47
1.11
3.14
3.41
3.68
4.13
4.11
60-min
(1.35-1.59)
(1.63-1.93)
(1.99-2.37)
(2.26-2.69)
(2.60-3.09)
(2.853.40)
(3.083.69)
(3.31-3.99)
(3.59-4.38)
(3.79-4.67)
0.845
1.02
1.1
1.45
1.10
1.88
2.06
2.24
2.48
2.66
2-hr
(0.775-0.924)
(0.937-1.12)
1 (1.16-1.39) 11
(1.33-1.59)
1 (1.54-1.85)
1 (1.70-2.04)
(1.85-2.24)
(2.00-2.44)
(2.19-2.70)
(2.33-2.90)
0.598
0.123
0.902
1.01
1.23
1.38
1.52
1.68
1.89
2.05
3-hr
(0.547-0.658)
(0.661-0.796)
(0.824-0.991)
(0.947-1.14)
1 (1.11-1.34)
1 (1.24-1.50) 11
(1.36-1.66)
1 (1.49-1.83) 11
(1.65-2.06)
(1.78-2.24)
0.359
0.433
0.541
0.626
0.111
0.832
0.926
1.02
1.16
1.26
6-hr
(0.328-0.394)
(0.397-0.476)
(0.495-0.594)
(0.570-0.686)
(0.671-0.809)
(0.748-0.907)
(0.827-1.01)
(0.904-1.11) 11
(1.01-1.26) 11
(1.9-1.37)
0.211
0.255
0.320
0.371
0.443
0.501
0.561
0.624
0.113
0.184
D�E]12-hr
(0.193-0.231)
(0.234-0.281)
(0.292-0.351)
(0.338-0.407)
(0.401-0.484)
(0.450-0.547)
(0.499-0.611)
(0.549-0.680)
(0.616-0.775)
(0.69-0.854)
0.126
0.152
0.191
0.222
0.265
0.300
0.337
0.375
0.430
0.474
24-hr
(0.116-0.136)
(0.140-0.164)
(0.176-0.207)
(0.204-0.240)
(0.243-0.287)
(0.274-0.325)
(0.306-0.366)
(0.339-0.408)
(0.386-0.467)
(0.423-0.516)
2-day
0.068-0080
0082-0097
0.103-0.121
0.1019-0..1140
0.141-0.166
0.158-0.1188
0.177-0211
0.195-0.235
0.22 -0 29
0.2 2-0296
3-day
0.048-0 056
0058-0068
0.007 0 084
0.083-0097
0098-0116
0.1011-0130
0.123-0..1146
0.136 0001.162
0.154-0 186
0.19-0205
4-day
0.038-0 045
00-0 5 464
005 -0.066
0.065-0076
0.0077--0 090
0.087--00.1102
9 0.6-01114
0.106-0126
0.121-0.1144
0.132-0 59
1.127
1.133
0.040
1.145
1.11
1.11
1.111
1.173
1.113
1.111
7-day
(0.026-0.029)
(0.031-0.035)
(0.037-0.043)
(0.042-0.049)
(0.050-0.057)
(0.055-0.064)
(0.061-0.071)
(0.067-0.079)
(0.076-0.089)
(0.083-0.098)
1.122
1.121
1.12
1.131
1.141
1.11
1.111
1.111
1.112
1.117
10-day
(0.021-0.023)
(0.025-0.028)
(0.030-0.034)
(0.033-0.038)
(0.039-0.044)
(0.043-0.049)
(0.047-0.054)
(0.051-0.059)
(0.057-0.066)
(0.062-0.072)
1.115
1.117
1.11
1.123
1.121
1.11
1.132
1.135
1.131
1.141
20-day
(0.014-0.016)
(0.016-0.018)
(0.019-0.022)
(0.022-0.024)
(0.025-0.028)
(0.027-0.031)
(0.030-0.034)
(0.032-0.037)
(0.036-0.041)
(0.038-0.044)
0.012
0.014
0.017
0.018
0.021
0.023
0.024
0.026
0.029
0.031
30-day
(0.011-0.013)
(0.013-0.015)
(0.016-0.017)
(0.017-0.019)
(0.020-0.022)
(0.021-0.024)
(0.023-0.026)
(0.025-0.028)
(0.027-0.030)
(0.028-0.032)
0.010
0.012
0.014
0.015
0.017
0.018
0.019
0.021
0.022
0.023
45-day
(0.010-0.011)
(0.011-0.012)
(0.013-0.014)
(0.014-0.016)
(0.016-0.017)
(0.017-0.019)
(0.018-0.020)
(0.019-0.022)
(0.021-0.023)
(0.022-0.025)
0.009
0.011
0.012
0.013
0.015
0.016
0.017
0.018
0.019
0.020
60-day
(0.009-0.010)
(0.010-0.011)
(0.011-0.013)
(0.012-0.014)
(0.014-0.015)
(0.015-0.016)
(0.016-0.017)
(0.017-0.018)
(0.018-0.020)
(0.019-0.021)
Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a
given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%, Estimates at upper bounds are not
checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=34.9818&Ion=-80.4569&data=intensity&units=english&series=pds 1/3

Table 4: HS s for North Carolina Soil Types
Urban areas runoff ctirve numbers for SCS method (SCS
1986)
Fully developed urban areas
Open Space :lawns, parks, golf courses, etc.)
Poor condition (e- 660% grass cover)
68
79
86
89
Fair condition (50% to 76% grass cover)
49
69
79
84
Good condition (> 75% crass cover)
39
61
74
8-0
Impervious areas:
Paved parking lots_ roofs, driveways, etc_
96
98
98
98
Streets and roads:
Paved; curbs and storm sewers
98
98
98
98
Paved. open ditcties
83
89
98
98
Gravel
76
85
89
91
Dirt
72
82
85
88
Developing Urban areas
Newly graded areas
77
86
91
94
Pastufa (e- 50% ground cover or heavily grazed)
68
79
86
89
Pastufa (50% to 75`ri- ground cover or not heavily grazed)
49
68
79
#.
Pastufa (>75% grou nd cover of lightly grazed)
39
61
74
80
I. Fh''YYYNCtwiw
NCDEQ Storm-evater Design Manual _ 4Xw°"
Meadow — continuous grass, protectadl from grazing and
generally mowed for hay
Brush (< 50% ground cover)
Brush (50% to 75% ground cover)
Brush (>75% ground cover)
Woods (Forest litter, small trees, and brush destroyed by
heavy grazing or fegular buming)
Woods (Woods are grazed but not burned, and saute
forest litter covers ;he soil)
Woods (Woods are protected from grazing, and litter and
brush adequately cover the soil)
30
58
79
78
48
67
77
83
35
56
76
77
30
48
65
73
45
66
77
83
36
66
73
79
30
55
70
77

549480
34o 58' 56" N
0
N
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0
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0
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�i
34o 58' 51" N
549480 549500 549520 549540
Map Scale: 1:800 if printed on A portrait (8.5" x 11") sheet.
Meters
$ N 0 10 20 40 EO
Feet
0 35 70 140 210
Map projection: Web Mercator Conermordinates: WGS84 Edge tics: lfrM Zone 17N WGS84
usoA Natural Resources Web Soil Survey
Conservation Service National Cooperative Soil Survey
Hydrologic Soil Group —Union County, North Carolina
(Mini Storage USA)
549500 549520 549540 5495M
34o 58' 56" N
0
N
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�i
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0
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34o 58' 51" N
11 /28/2021
Pagel of 4

Hydrologic Soil Group —Union County, North Carolina
(Mini Storage USA)
MAP LEGEND
Area of Interest (AOI)
0
Area of Interest (AOI)
Soils
Soil Rating
Polygons
0
A
0
A/D
0
B
0
B/D
C
0
C/D
0
D
0
Not rated or not available
Soil Rating
Lines
r 0
A
r 0
A/D
B
B/D
N 0
C
r 0
C/D
r 0
D
r 0
Not rated or not available
Soil Rating
Points
0
A
0
A/D
0
B
0
B/D
❑ C
0 C/D
0 D
❑ Not rated or not available
Water Features
Streams and Canals
Transportation
— Rails
­0 Interstate Highways
US Routes
Major Roads
Local Roads
Background
D6 Aerial Photography
MAP INFORMATION
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Union County, North Carolina
Survey Area Data: Version 21, Sep 15, 2021
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 18, 2011—Oct 30,
2018
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
usoA Natural Resources Web Soil Survey 11/28/2021
Conservation Service National Cooperative Soil Survey Page 2 of 4

Hydrologic Soil Group —Union County, North Carolina
Mini Storage USA
Hydrologic Soil Group
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
BuB
Badin-Urban land
complex, 2 to 8
percent slopes
C
1.8
100.0%
Totals for Area of Interest
1.8
100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long -duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink -swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method. Dominant Condition
USDA Natural Resources Web Soil Survey 11/28/2021
Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group —Union County, North Carolina
Mini Storage USA
Component Percent Cutoff.- None Specified
Tie -break Rule: Higher
USDA Natural Resources Web Soil Survey 11/28/2021
Conservation Service National Cooperative Soil Survey Page 4 of 4