SW3210101_300- The Glenns SIA Report_20210324

-mop
T
000,
_;RP
11 0
, �e-7 --7,
:40
THE GLENNS
Stormwater Impact Analysis and Final Design of Stormwater Control Measure
WADAms

THE GLENNS
The Town of Wingate, North Carolina
Stormwater Impact Analysis &
Design of Stormwater Control Measure
Project Number:
Designed By:
Date:
TRU-1 9030
Michael Duval, PE
March 2021
-10 CARO
SE L
048769
WADAMS
3430 Toringdon Way, Suite 110
Charlotte, North Carolina 28277
NC Lic. # C-0293

2 MCADAMS STORMWATER IMPACT ANALYSIS
GENERAL DESCRIPTION
Located east of Ansonville Rd and north of Monroe Expressway in the Town of Wingate in Union County,
North Carolina, is the proposed development known as The Glerms. The existing site consists of areas of
woods and trails. Proposed development on this site will consist of the construction of single-family
homes, along with associated roads, sidewalks, utility improvements and one stormwater control
measure.
The proposed development is located within the Yadkin River basin with stormwater runoff from the
proposed development draining into the Meadow Branch & Austin Branch in the Richardson Creek
Watershed. Per Town of Wingate regulations, stormwater management on this site shall meet the
stormwater management performance standards for development set forth in the Town of Wingate Code
of Land Ordinances & NCDEQ IVIDC. These are as follows:
6.5 Stormwater Management for the Town of Wingate, NC.
All developments shall be constructed and maintained so that adjacent properties are not unreasonably
burdened with surface waters as a result of such developments.
A. No development may be constructed or maintained so that such
development impedes the natural flow of water from higher adjacent
properties across such development, thereby causing damage to such higher adjacent properties;
and
B. No development may be constructed or maintained so that surface
waters from such development are collected and channeled onto lower
adjacent properties at such locations or at such volumes as to cause damage to lower adjacent
properties.
15A NCAC 02H.1003 NCDEQ Requirements that apply to all projects.
DESIGN REQUIREMENTS FOR HIGH DENSITY PROJECTS. High density projects are projects that do not
conform to Item (2) of this Rule. High density projects shall meet the following minimum design criteria:
(a) TREATMENT REQUIREMENTS. SCIVIs shall be designed, constructed, and maintained so that the
project achieves either "runoff treatment" or "runoff volume match" as those terms are defined in Rule
.1002 of this Section.
(b) OFF -SITE STORMWATER. Stormwater runoff from off -site areas and existing development shall not be
required to be treated in the SCM. Runoff from off -site areas or existing development that is not
bypassed shall be included in the sizing of on -site SCIVIs at its full built -out potential.
(c) OFF -SITE SCM. A project that controls runoff through an off -site SCM shall be allowed on a case -by -
case basis as determined by the permitting authority if the off -site SCM meets the provisions of Rules
.1050 through .1061 of this Section.
(d) EXPANSION OR REPLACEMENT OF EXISTING DEVELOPMENT. When new built -upon area is added to
existing development or existing development is replaced with new built -upon area, only the area of net
increase shall be subject to this Section.
creating experiences through experience 3430 Toringdon Way, Suite 110, Charlotte, NC 28277 / 704. 527. 0800

TIMCADAMS
STORMWATER IMPACT ANALYSIS
(e) IVIDC FOR SCIVIS. SCIVIs shall meetthe relevant IVIDC setforth in Rules .1050through .1062 of this
Section except in accordance with Item (6) of this Rule.
To meet the above requirements, one wet pond & one sand filter is being proposed to control post -
development peak runoff rates to their pre -development condition. Please refer to the appropriate
section of this report for additional information.
CALCULATION METHODOLOGY
• Rainfall data for the analysis was taken from NOAA's database for the Town of Wingate. Please
reference the precipitation information section within this report for additional information.
• Using maps contained within the Union County Soil Survey, the on -site soils were determined to
be hydrologic soil group (HSG) 'C' and 'D' soils. Since the method chosen to compute post -
development peak flow rates and runoff volumes is dependent upon the soil type, care was taken
when selecting the appropriate Soil Conservation Service Curve Number (SCS CN). A composite
SCS CN was computed for each pre- and post -development sub -basin. For example, Subbasin #1
in the pre -development analysis consists of approximately 39% HSG 'C' and 61% HSG 'D' soils.
Therefore, for the open area cover condition, the composite SCS CN is computed as follows
(assuming good condition):
> Composite OpenSCS CN= (39%x 74) + (61%x8O) = 78
• A composite SCS Curve Number was calculated for both the pre- and post -development condition
for each sub -basin using SCS curve numbers and land cover conditions. Land cover conditions for
the pre -development condition were taken from available survey and GIS information. Land cover
conditions for the post -development condition were taken from the proposed development plan.
• The time of concentration was calculated using SCS TR-55 (Segmental Approach, 1986). The Tc
flow path was divided into three segments: overland flow, concentrated flow, and channel flow.
The travel time was then computed for each segment, from which the overall time of
concentration was determined by taking the sum of each segmental time.
• PondPack Version V8i was used in determining the pre- & post -development peak flow rates for
the 1-, 10-, 25-, 50-, and 100- year storm events, as well as routing calculations for the proposed
stormwater control measures.
• The proposed stormwater control measures were designed in accordance with the Minimum
Design Criteria (MDQ standards set forth in the NCDEQ Stormwater Design Manual.
creating experiences through experience 2 of 3

2 MCADAMS
DISCUSSION OF RESULTS
STORMWATER IMPACT ANALYSIS
Peak Runoff Control Requirements:
The proposed project will result in a significant increase in peak flow rates to downstream properties. To
mitigate these impacts, the proposed stormwater control measures have been sized such that post -
development peak flow rates are no greater than pre -development levels in the 1-, 10-, 25-, and 50- year
storm events on site.
Water Quality Requirements:
The proposed facilities were designed in accordance with the Minimum Design Criteria (MDC) standards
set forth in the NCDEQ Stormwater Design Manual. The proposed facilities will provide the required 85%
TSS removal.
CONCLUSION
If the development on this tract is built as proposed within this report, then the requirements set forth in
the Town of Wingate Code of Ordinances will be met. However, modifications to the proposed
development may require that this analysis be revised. Some modifications that would require this
analysis to be revised include:
• The proposed site impervious surface exceeds the amount accounted for in this report.
• The post -development watershed breaks change significantly from those used to prepare this
report.
The above modifications may result in the assumptions within this report becoming invalid. The
computations within this report will need to be revisited if any of the above conditions become apparent
as development of the proposed site moves forward.
creating experiences through experience 3 of 3

SUMMARY OF RESULTS
MISCELLANEOUS SITE INFORMATION
WATERSHED SOILS INFORMATION
SITE PRECIPITATION DATA
PRE -DEVELOPMENT HYDROLOGIC CALCULATION
�POST -DEVELOPMENT HYDROLOGIC
CALCULATIONS
�STORMWATER CONTROL MEASURES DESIGN
CALCULATIONS

SUMMARY OF RESULTS
The Glenns
TRU-1 9030

9 MCADAMS
SUMMARY OF RESULTS
Project Name: The Glenns
Project Numbet TRU-1 9030
RELEASE RATE MANAGEMENT RESULTS
POINT OF ANALYSIS #1
Pre-Dev I Post-Dev
Return Period [cfs] [cfs] % Increase
1-year
16.12
6.75
1 -58%
10-year
41.27
38.97
-6%
25-year
51.08
50.9
INA
50-year
58.32
55.2:
100-year
65.21
58.93
-10%
POINT OF ANALYSIS #5
Pre-Dev I Post-Dev
Return Period rcfsi rcfsi o/ Increase
1-year
9.72
2.90
-70%
10-year
27.81
17.55
-37%
25-year
35.28
28.99
-18%
50-year
40.89
39.88
-2%
100-year
46.32
49.54
7%
Date: 3/17/2021
Calculated By: M. Duval, PE

9 MCADAMS
SUMMARY OF RESULTS
Project Name: The Glenns
Project Numbet TRU-1 9030
STORMWATER CONTROL MEASURE SUMMARY
Design Drainage Are: 24. �5
� cres
Design I mpervio�us Are 8.8 :cres
% Impervious 35.811
Water Quality Volume 3 cf
70,431
1 -Year Treatment Volume = ad cf
Top of Dam = 578.00 ft
NWSE = 572.50 Ift
Riser =
Riser Elevation = 1 575.00 ft
Siphon Diameter = in
Siphon Elevation =1 572.50 ft
Orifice = 6"W" in
Elevation = 1 573.50 Ift
Barrel Diameter 24 in
I nvert I n 572.50 ft
Invert Out 571.85 ft
Length 135 ft
% Slope = 1 0.48
STORMWATER CONTROL MEASURE ROUTING RESULTS
Inflow Outflow Max WSE I Freeboard
Return Period I [C1 I [CfSJ [f [ft]
1
67.18
6.45 =
574.35
3.65
10
133.71
37.60
575.76
25
155.74
49.29
576.28
50
171.14
53.32
576.70
100
184.91
56.76
577.08
Date: 3/17/2021
Calculated By: M. Duval, PE

9 MCADAMS
SUMMARY OF RESULTS
Project Name: The Glenns
Project Numbet TRU-1 9030
STORMWATER CONTROL MEASURE SUMMARY
Design Drainage Are: 13.75 acres
Design I mpervio us Are 6.42 acres
% Impervious 46.7%
,979 cf
Water Quality Volume 425d
Top of Dam = 578.00 ft
NWSE = 574.00 Ift
Riser =
Riser Elevation = 1 576.00 ft
Siphon Diameter = in
Siphon Elevation =1 574.00 ft
Orifice = 6.. x24" in
Elevation = 575.00 Ift
Barrel Diameter in
I nve rt I n ft
Invert Out ft
Length ft
% Slope =ad
STORMWATER CONTROL MEASURE ROUTING RESULTS
Inflow Outflow Max WSE I Freeboard
Return Period I C fs] I `CfS1 [ft] [ft]
1
-----F-1.86
41.19
575.20
10
78.08
13.74
576.23
25
90.00
23.14
576.44
50
98.29
32.29
576.61
100
105.67
41.01
57679
Date: 3/17/2021
Calculated By: M. Duval, PE

MISCELLANEOUS SITE INFORMATION
The Glenns
TRU-1 9030

ik
A
e&Wll lose
ow :A K 010 Sl'
or_
AL lft�
116 t
te Ja T*,:
Aw
Soo;- -
&
1&fflSjLA—_eur@GcjF2# K
cm L ,
AN THE GLENNS
SITE AERIAL MAP
0 335 670 1,340 PROJECT #: TRU-19030
I inch = 666.666667 feet Feet WINGATE, NORTH CAROLINA McADAMS

m ey nyto��
ey
OW-00
�Fj JR!
0
.9 00
SITE
X-7
1754
T
rk
C=3
S90
ak
%.Mae
46
.77
G
eld repo
Irmo
so
ubed
Cbb c ,,l 3_����
N
THE GLENNS
USGS TOPO MAP
0 625 1,250 2,500 PROJECT #: TRU-19030
I inch — 1,250 feet Feet WINGATE, NORTH CAROLINA WADAM�)

WATERSHED SOILS INFORMATION
The Glenns
TRU-1 9030

o
M..T.SZ .08
0
z
0
0
CL
p
0
U)
0)
0
2
M..SE.SZ .08
0Mzsc ONCZSC 0��Zsc OZ67LSC cmzzsc
0Mzsc ONCZSC 0��Zsc OZ67LSC cmzzsc
M..T.SZ .08
0
N
0 0
0)
0 (U
— IL
U)
U)
U)
= M
0 �j
U) CL
0
0
Lf)
0
z
.2
Ln
>
0
0
z .iiiiic
0
z
M..SE.SZ .08

0
z
0
0
CL
0
U)
0)
0
2
z
2
0
LL
z
CL
a
z
LU
0
LU
—j
CL
CL
CL
m
E
0
0
CL
E
0
U)
'C�
U) 0
— _0
CL M
CL
M
U) E
0
EL U)
(U CL 0 C:
o 0 W
>
0
-0 U)
o
E
m 0 2)
E u)
u) a) E o)
b) E
(UU)
'E 2' -CL -�= 6
c -Fu
0 0
Lu E = 6 W—
U)
U) ('U'
-IOU
U)
Xo
a)
CL
o o
u)
_0
a)
00
U)
a) 2
E
a)
U)
CL
a)
0 E
,2
Cc:
LO
a) a)
W M W cr
U)
(cu:
E
m
U) -0 o
00
:5 =; 2
C: CML au)) a)
C)
af
2
0
=a) a)
U)
a) 0
0 >
Z
o
M N
U)
E u)
CL
m
U) U)
I'L
70 m
UT)
I
<
0
N
3:
0
. .
)
!E 2
E
o
C) —
U)
m L =0 9)
U)
-r-
m
IQ
'o
0
z C:
in
0 <
m
a)
0
Z- 0
1)
m
cu)L
0)
0
CL M
(u E
C:
2
0
go)
-2
E
=0;
cL
E m
0
E
U=); au)) ac)) 2
2 o
0 au)) cL -- 0
U) Cc:
<
m
z E
2 0
cL o
-v
a)J6
j6
a)
mO)
:L-
0
6
�6 ap))
E
0 0
CL a) U)
U)
U)
.2-0 c-
-0
0
a?
U)
8
cm -Fu
a)
0 m
= c: V) E
2
—a)
=0 (Su
E Or
ao) a2)
2
a>)
W
<
0
CL 0
a)
M 00
CL m
0 �5 —
0
a"
U) U)
ao)
2 U)
.2
U) C:
2
CL a)
u) a)
M 0
E c�
F,
0)
o a
M m
a) a)
09 o
D
U) :5
!E
= L
0 =;
= 0
o LP
0).s�
E m 15
FL E
u) 0
2 om
u) u)
u)
m
�E- Oo E
a)
Z
>
CL
0
0
0
0 0
0 m 0-
m
a U)
0 z <
.2
El 0 0 13 LL
0
u
>
0 Z:
0)
0
0
2,
'a)
ao
m
0 0
0 Z
16
F
0
co
0
co
co
0
41
.- 0
a.
m 6-0 o z 0) < m
S
El El 13 13
0
co
0
N
0 0
IL
U)
U)
U)
0
U) CL
0
0
0
0
m
z
>
C/)
o
. 0
>
0

Hydrologic Soil Group —Union County, North Carolina
PL
Hydrologic Soil Group
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
BaB
Badin channery silt
C
0.2
0.4%
loam, 2 to 8 percent
slopes
CmB
Cid channery silt loam, 1
D
18.9
40.3%
to 5 percent slopes
GsB
Goldston-Badin
D
9.7
20.7%
complex, 2 to 8
percent slopes
MhA
Misenheimer-Cid
C/D
18.1
38.6%
complex, 0 to 3
percent slopes
Totals for Area of Interest
47.0
100.0%
USDA Natural Resources Web Soil Survey 10/17/2020
a-= Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group —Union County, North Carolina
PL
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
Component Percent Cutoff.- None Specified
Tie -break Rule: Higher
USDA Natural Resources Web Soil Survey 10/17/2020
Conservation Service National Cooperative Soil Survey Page 4 of 4

PRECIPITATION DATA
The Glenns
TRU-1 9030

12/21/2020 Precipitation Frequency Data Server
NOAA Atlas 14, Volume 2, Version 3 '1-'
in,
Location name: Wingate, North Carolina, USA* A
Latitude: 34.999*, Longitude: -80.4236*
Elevation: 590.3 ft** It
*source: ESR I Maps :r wd
source USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, T Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabular I PF grap!2j�cal I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inche
I Average recurrence interval (years)
1 17
1 100
F-O-.4-29--]F-O-.5-07--]F-O-.5-88--]F-O-.6-47--]F-O-.7-14--]
F-0-1-6 -1-]
F-O-.8-0-3-]
F-O-.8-4-1-]
F-O-.8-8-5-]
F-O-.9-1-6-]
1(0.395-0.466)11(0.466-0.553)11(0.539-0.641)11(0.593-0.703)11(0.651-0.775)
1(0.691-0.825)
1(0.726-0.871)
1(0.756-0.913)
1(0.788-0.962)
1(0.809-0.998)
F-0-.658-5�F-0-.8-1
-1�F-05-4-2�F-T-03-�F-T-1
4-�
F-T-2 1-�
F-T-28-�
F-T-33-�
F-T-40-�
F-T-44-�
1(0.630-0.745)11(0.745-0.884)11(0.864-1.03)11(0.948-1.12)11
(1.04-1.24)
1 (1.10-1.31)
1 (1.15-1.38)
1 (1.20-1.45)
1 (1.25-1.52)
1 (1.27-1.57)
F-05-6-6�F-T-02-�F-T-19-�
1(0.788-0.931)11(0.936-1.11)
11
(1.09-1.30) 1
1 (1.32-1.57)
1 (1.39-1.66)
1 (1.46-1.75)
1 (1.51-1.83)
1 (1.57-1.92)
1 (1.60-1.97)
F--l.-69--]F--l.-90--]F--2.-14--]F--2.-31--]F--2.-47--]F--2.-62--]F--2.-80--]F--2.-93--]
(1.55-1.84)
(1.74-2.06) 11
(1.95-2.32)
1 (2.10-2.51)
1 (2.23-2.68)
1 (2.35-2.84)
1 (2.50-3.05)
1 (2.59-3.20)
F-T-46-�
F--2.-86-�F--3.-13-�F--3.-40-�F--3.-67-�F--4.-02-�F--4.-28-�
1 (1.35-1.59) 1
1 (2.60-3.09)
(2.84-3.40)
(3.08-3.69)
(3.30-3.99)
(3.58-4.37)
(3.78-4.66)
F-T-69-�F-T-06-�
1 (1.55-1.85) 11
(1.87-2.24)
(2.65-3.18) 11
(3.08-3.69)
(3.39-4.09)
(3.70-4.48)
(4.00-4.87)
(4.37-5.40)
(4.65-5.80)
F-T-80--]
F--3.-12--]F--3.-68--]F--4.-13--]F--4.-57--]F--5.-03--]F--5.-66--]F--6.-15--]
(1.64-1.98) 1
1 (2.84-3.43)
(3.33-4.03)
(3.71-4.51)
(4.08-4.98)
(4.46-5.49)
(4.95-6.18)
(5.33-6.73)
(2.37-2.85)
(2.96-3.56)
(4.01-4.84)
(4.48-5.43)
(4.95-6.04)
(5.41-6.66)
(6.04-7.53)
(6.51-8.22)
F--507-�F--586-�
F - T-3 3-
F - -6.-0 3-
F - -677 6-
F - T-6 1-
F - -8.-6 7-
F - -9.-4 3-
1 (2.81-3.38) 11
(3.52-4.22) 1
1 (4.83-5.83)
1 (5.41-6.58)
1 (6.00-7.36)
1 (6.60-8.18)
1 (7.41-9.33)
1 (8.05-10.3)
F - -1-0 1- - I
F - -3.-6 3- - I
F - -5.-3 1- - I
F - -6.-3 5- -
F - -7.-19- -
F - -8.-0 7- -
F - -8.-9 9- -
F - -10-. 3- -
F - -11-. 3- -
1 (2.77-3.26) 11
(3.35-3.94) 1
1 (4.88-5.76) 11
(5.80-6.89)
1 (6.55-7.80)
1 (7.32-8.76)
1 (8.12-9.77)
1 (9.23-11.2)
1 (10.1-12.4)
F - -3.-6 4- �
F - -4.-2 6- �
F - T-3 2-
F - T-3 4-
F - -833 0-
F - -9.-2 9-
F - -10-. 3-
F - -11-. 8-
F - -1 3T. 0-
(3.27-3.84) 11
(3.94-4.63) 11
(4.92-5.78)
1 (6.74-7.96)
1 (7.58-8.99)
1 (8.46-10.1)
1 (9.35-11.2)
1 (10.6-12.9)
1 (11.6-14.2)
F - T-6 0-
F - -6.-4 7-
F - T-6 8-
F - -8.-6 6-
F - -9.-6 8-
F - -10-. 7-
F - -1 2T. 3-
F - -1 3T. 6-
1 (5.18-6.06) 11
(5.97-7.00) 11
(7.06-8.31)
1 (7.94-9.37)
1 (8.84-10.5)
1 (9.76-11.7)
1 (11.1-13.3)
1 (12.1-14.7)
F - -3.-9 7- - I
F - -4.-7 6- - I
F - -5.-8 8- - I
F - -8.-0 2- -
F - -9.-0 3- -
F - -10-. 1- -
F - -11-. 2- -
F - -12-. 7- -
F - -14-. OF -
(3.68-4.28) 11
(4.42-5.13) 11
(5.45-6.34) 1
1 (7.39-8.65)
1 (8.29-9.75)
1 (9.22-10.9)
1 (10.2-12.1)
1 (11.5-13.8)
1 (12.6-15.2)
F-T-46-�F-T.-66-�
F - -8.-9 4-
F - -10-. 0-
F - -1 T 1-
F - -1 2T. 3-
F - -1 3T. 9-
F - -16-. 3-
1 (5.11-5.85) 11
(6.22-7.14) 1
1 (8.31-9.59)
1 (9.28-10.7)
1 (10.3-11.9)
1 (11.3-13.2)
1 (12.7-15.0)
1 (13.9-16.5)
F-T-26-�F-T.-26-�
F - -8.-6 6-
F - -9.-9 2-
F - -1 T 0-
F - -1 2T. 1-
F - -1 3T. 2-
F - -14-. 8-
F - -16-. 1-
1 (4.94-5.61) 11
(5.87-6.67) 1
1 (7.99-9.11) 11
(9.25-10.6)
1 (10.2-11.7)
1 (11.2-12.9)
1 (12.2-14.1)
1 (13.6-15.9)
1 (14.7-17.3)
F - -7.-0 7- - I
F - -8.-3 4- - I
F - -9.-8 6- - I
F - -12-. 7- -
F - -14-. OF -
F - -1 K 3- -
F - -16-. 6- -
F - -18-. 4- -
F - -19-. 8- -
1 (6.67-7.49) 11
(7.87-8.84) 11
(9.28-10.5)
1 (11.9-13.5)
1 (13.1-14.8)
1 (14.3-16.2)
1 (15.5-17.6)
1 (17.1-19.6)
1 (18.3-21.2)
F - -8.-6 7- �
F - -10-. 2- �
F - -1 T 9-
F - -14-. 9-
F - -16-. 2-
F - -1 T 6-
F - -18-. 8-
F - -2 0-. 6-
F - -2 T 9-
1 (8.21-9.15) 11
(9.67-10.8) 11
(11.3-12.5)
(14.1-15.7)
(15.3-17.1)
(16.5-18.5)
(17.7-20.0)
(19.2-21.9)
(20.4-23.4)
F-71 0-. 9-�
F-71 2-.8-�
F - -16-. 1-
F - -18-. 0-
F - -19-. 4-
F - -2 0-. 8-
F - -2 2T. 1-
F - -2 3T. 9-
F - -2 6-. 3-
(10.4-11.5) 11
(12.2-13.4)
(15.3-16.9)
(17.0-18.9)
(18.3-20.3)
(19.6-21.8)
(20.8-23.3)
(22.4-25.2)
(23.6-26.7)
===F-18.-8---JF-20.-8--]F-22.-4--]F-23.-8--]F-25.-2--]F-27.-l--]F-28.-5--]
L(11 8.0-19.7) _JL____
(19.8-21.8) JL(21.2-23.4)
____ JL(22.6-24.9)
____ JL(23.9-26.5)
____ JL(25.6-28.5)
____ JL(26.8-30.0)
____ J
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. htm I?Iat=34.9990& Ion =-80.4236&data=de pth&u nits=e ng lish&series=pds 1/4

12/21/2020 Precipitation Frequency Data Server
M111
20
CL
di
15
49
10
CL
i
30
25
r-
213
15
49
N
CL
PDS-based depth -du ratio n-frequency (DDIF) curves
Latitude: 34.9990', Longitude: -80.4236'
: L : L - J : J : J : J : - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - -
— - - - --- - - - -- - - - - - -- - - - - - - I- - - - - - - - - - - - - - - - - - - - - - -- - - -
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
. . . . . ... . .
A L6
r� A 4 6 6 6 Ln 6
r-4 r-I rn LO Duration 1.4 N rn �T LD
0 N.-v W��� M - a -
1 2 5 10 25 50 100 200 500 1000
Average recurrence interval (years)
NOAA Atlas 14, Vo I u me 2, Vers iori 3 Created (GMT): Mon Dec 21 18:36:26 2020
Back to Top
Maps & aerials
Small scale terrain
Avwags recurwce
intefva I
fyears�
2
25
50
100
213C
500
1000
DuFation
— 6-min —
2-day
— i D-min —
3-day
1 5-min —
4-d my
— 3"ir —
71-d ay
— 45D-min —
I o-clay
2-hr —
20-clay
3-hr —
30-day
f-hr —
45-Jay
12-hr —
60-clay
24-Mr
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds—printpage.htmI?Iat=34.9990&lon=-80.4236&data=depth&units=engIish&series=pds 2/4

WpAlli
Precipitation Frequency Data Server
5A
M2rs ill"V
Wingate
+
Mon FOQ
Urn
--I,
2nni
Large scale terrain
City Winston-Salem
Durham
Y, Greensboro
Rale-19
NORTH C A R 0 L INA
Chajotte Fayetteville
Greenville
SOUTH CAROLINA Imir
V N
100knin
—Y hia
60mi
Large scale map
Win�ston-Saleni Greensboro
Durhani
J qleigl
R,
North
C Ca
aFolina
ariotte
k
Tirribia
1 00krn
'ith
-��6�0rni
Large scale aerial
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds—printpage. htm I?Iat=34.9990& Ion =-80.4236&data=de pth&u nits=e ng lish&series=pds 3/4

MMKIYU
Precipitation Frequency Data Server
Back to Top
US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West Highway
Silver Spring, MID 20910
Questions?: [e-mail]
Disclaimer
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds—printpage.htmI?Iat=34.9990&Ion=-80.4236&data=depth&units=english&series=pds 4/4

9 MCADAM
Storm Data Detailed
Report: Wingate
Element Details
ID
37 Notes
Label
Wingate
WQV
Label
WQV End Time
1,440.000 min
Return Event
0.10 years Depth
1.90 in
Start Time
0.000 min Storm Event Depth Type
Incremental
Increment
6.000 min
w(2V
Time
Depth
Depth Depth
Depth
Depth
(min)
(in)
(in) (in)
(in)
(in)
0.000
0.00
0.00
0.00
0.00
0.00
30.000
0.00
0.00
0.00
0.00
0.00
60.000
0.00
0.00
0.00
0.00
0.00
90.000
0.00
0.00
0.00
0.00
0.00
120.000
0.00
0.00
0.00
0.00
0.00
150.000
0.00
0.00
0.00
0.00
0.00
180.000
0.00
0.00
0.00
0.00
0.00
210.000
0.00
0.00
0.00
0.00
0.00
240.000
0.00
0.00
0.00
0.00
0.00
270.000
0.00
0.00
0.00
0.00
0.00
300.000
0.00
0.00
0.00
0.00
0.00
330.000
0.00
0.00
0.00
0.00
0.00
360.000
0.00
0.00
0.00
0.00
0.00
390.000
0.00
0.00
0.00
0.00
0.00
420.000
0.00
0.00
0.00
0.00
0.00
450.000
0.00
0.00
0.00
0.00
0.00
480.000
0.00
0.00
0.00
0.00
0.00
510.000
0.01
0.01
0.01
0.01
0.01
540.000
0.01
0.01
0.01
0.01
0.01
570.000
0.01
0.01
0.01
0.01
0.01
600.000
0.01
0.01
0.01
0.01
0.01
630.000
0.01
0.01
0.01
0.01
0.01
660.000
0.01
0.01
0.02
0.02
0.02
690.000
0.02
0.05
0.09
0.15
0.26
720.000
0.18
0.04
0.03
0.03
0.02
750.000
0.02
0.02
0.02
0.01
0.01
780.000
0.01
0.01
0.01
0.01
0.01
810.000
0.01
0.01
0.01
0.01
0.01
840.000
0.01
0.01
0.01
0.01
0.01
870.000
0.01
0.01
0.01
0.01
0.01
900.000
0.01
0.01
0.01
0.01
0.01
930.000
0.01
0.00
0.00
0.00
0.00
960.000
0.00
0.00
0.00
0.00
0.00
990.000
0.00
0.00
0.00
0.00
0.00
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
WQV
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
1,020.000
0.00
0.00
0.00
0.00
0.00
1,050.000
0.00
0.00
0.00
0.00
0.00
1,080.000
0.00
0.00
0.00
0.00
0.00
1,110.000
0.00
0.00
0.00
0.00
0.00
1,140.000
0.00
0.00
0.00
0.00
0.00
1,170.000
0.00
0.00
0.00
0.00
0.00
1,200.000
0.00
0.00
0.00
0.00
0.00
1,230.000
0.00
0.00
0.00
0.00
0.00
1,260.000
0.00
0.00
0.00
0.00
0.00
1,290.000
0.00
0.00
0.00
0.00
0.00
1,320.000
0.00
0.00
0.00
0.00
0.00
1,350.000
0.00
0.00
0.00
0.00
0.00
1,380.000
0.00
0.00
0.00
0.00
0.00
1,410.000
0.00
0.00
0.00
0.00
0.00
1,440.000
0.00
(N/A)
(N/A)
(N/A)
(N/A)
yr
Label
1 yr
Increment
5.000 min
Return Event
1.00 years
End Time
1,440.000 min
Start Time
0.000 min
Storm Event Depth Type
Cumulative
1 yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
0.000
0.00
0.00
0.01
0.01
0.01
25.000
0.02
0.02
0.02
0.03
0.03
50.000
0.03
0.04
0.04
0.04
0.05
75.000
0.05
0.05
0.06
0.06
0.06
100.000
0.07
0.07
0.07
0.08
0.08
125.000
0.08
0.09
0.09
0.09
0.10
150.000
0.10
0.10
0.10
0.11
0.11
175.000
0.11
0.12
0.12
0.12
0.13
200.000
0.13
0.13
0.14
0.14
0.14
225.000
0.15
0.15
0.15
0.16
0.16
250.000
0.16
0.17
0.17
0.17
0.18
275.000
0.18
0.18
0.19
0.19
0.19
300.000
0.20
0.20
0.20
0.21
0.21
325.000
0.21
0.22
0.22
0.22
0.23
350.000
0.23
0.23
0.24
0.24
0.25
375.000
0.25
0.26
0.26
0.27
0.27
400.000
0.28
0.28
0.29
0.30
0.30
425.000
0.31
0.31
0.32
0.32
0.33
450.000
0.33
0.34
0.34
0.35
0.35
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
1 yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
475.000
0.36
0.37
0.37
0.38
0.38
500.000
0.39
0.39
0.40
0.40
0.41
525.000
0.41
0.42
0.43
0.43
0.44
550.000
0.45
0.46
0.47
0.48
0.49
575.000
0.50
0.51
0.52
0.53
0.54
600.000
0.55
0.56
0.57
0.58
0.59
625.000
0.60
0.61
0.61
0.62
0.63
650.000
0.64
0.65
0.66
0.68
0.70
675.000
0.72
0.74
0.76
0.78
0.84
700.000
0.91
0.98
1.04
1.26
1.69
725.000
1.90
1.97
2.03
2.10
2.17
750.000
2.24
2.25
2.27
2.29
2.31
775.000
2.33
2.35
2.36
2.37
2.38
800.000
2.39
2.40
2.41
2.42
2.42
825.000
2.43
2.44
2.45
2.46
2.47
850.000
2.48
2.49
2.50
2.51
2.52
875.000
2.53
2.54
2.55
2.56
2.57
900.000
2.58
2.59
2.59
2.60
2.60
925.000
2.61
2.61
2.62
2.62
2.63
950.000
2.63
2.64
2.65
2.65
2.66
975.000
2.66
2.67
2.67
2.68
2.68
1,000.000
2.69
2.69
2.70
2.71
2.71
1,025.000
2.72
2.72
2.73
2.73
2.74
1,050.000
2.74
2.75
2.75
2.76
2.76
1,075.000
2.77
2.78
2.78
2.78
2.79
1,100.000
2.79
2.79
2.80
2.80
2.80
1,125.000
2.80
2.81
2.81
2.81
2.82
1,150.000
2.82
2.82
2.83
2.83
2.83
1,175.000
2.84
2.84
2.84
2.85
2.85
1,200.000
2.85
2.86
2.86
2.86
2.87
1,225.000
2.87
2.87
2.88
2.88
2.88
1,250.000
2.89
2.89
2.89
2.90
2.90
1,275.000
2.90
2.91
2.91
2.91
2.92
1,300.000
2.92
2.92
2.93
2.93
2.93
1,325.000
2.94
2.94
2.94
2.95
2.95
1,350.000
2.95
2.96
2.96
2.96
2.96
1,375.000
2.97
2.97
2.97
2.98
2.98
1,400.000
2.98
2.99
2.99
2.99
3.00
1,425.000
3.00
3.00
3.01
3.01
(N/A)
2 yr
Label
2 yr
Increment
5.000 min
Return Event
2.00 years
End Time
1,440.000 min
Start Time
0.000 min
Storm Event Depth Type
Cumulative
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
2 yr
2 yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
0.000
0.00
0.00
0.01
0.01
0.02
25.000
0.02
0.02
0.03
0.03
0.04
50.000
0.04
0.04
0.05
0.05
0.05
75.000
0.06
0.06
0.07
0.07
0.07
100.000
0.08
0.08
0.09
0.09
0.09
125.000
0.10
0.10
0.11
0.11
0.11
150.000
0.12
0.12
0.12
0.13
0.13
175.000
0.14
0.14
0.14
0.15
0.15
200.000
0.16
0.16
0.16
0.17
0.17
225.000
0.18
0.18
0.18
0.19
0.19
250.000
0.19
0.20
0.20
0.21
0.21
275.000
0.21
0.22
0.22
0.23
0.23
300.000
0.23
0.24
0.24
0.25
0.25
325.000
0.25
0.26
0.26
0.26
0.27
350.000
0.27
0.28
0.28
0.29
0.29
375.000
0.30
0.31
0.31
0.32
0.33
400.000
0.33
0.34
0.35
0.35
0.36
425.000
0.37
0.37
0.38
0.38
0.39
450.000
0.40
0.40
0.41
0.42
0.42
475.000
0.43
0.44
0.44
0.45
0.46
500.000
0.46
0.47
0.48
0.48
0.49
525.000
0.50
0.50
0.51
0.52
0.53
550.000
0.54
0.55
0.56
0.58
0.59
575.000
0.60
0.61
0.62
0.63
0.65
600.000
0.66
0.67
0.68
0.69
0.71
625.000
0.72
0.73
0.74
0.75
0.76
650.000
0.77
0.78
0.79
0.81
0.84
675.000
0.86
0.88
0.91
0.93
1.01
700.000
1.10
1.18
1.26
1.52
2.03
725.000
2.28
2.37
2.45
2.53
2.62
750.000
2.70
2.72
2.75
2.77
2.79
775.000
2.82
2.84
2.85
2.86
2.87
800.000
2.88
2.89
2.90
2.91
2.92
825.000
2.94
2.95
2.96
2.97
2.98
850.000
3.00
3.01
3.02
3.03
3.04
875.000
3.06
3.07
3.08
3.09
3.10
900.000
3.12
3.12
3.13
3.14
3.14
925.000
3.15
3.15
3.16
3.17
3.17
950.000
3.18
3.19
3.19
3.20
3.21
975.000
3.21
3.22
3.23
3.23
3.24
1,000.000
3.25
3.25
3.26
3.27
3.27
1,025.000
3.28
3.29
3.29
3.30
3.30
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
2 yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
1,050.000
3.31
3.32
3.32
3.33
3.34
1,075.000
3.34
3.35
3.35
3.36
3.36
1,100.000
3.37
3.37
3.37
3.38
3.38
1,125.000
3.39
3.39
3.39
3.40
3.40
1,150.000
3.40
3.41
3.41
3.42
3.42
1,175.000
3.42
3.43
3.43
3.44
3.44
1,200.000
3.44
3.45
3.45
3.46
3.46
1,225.000
3.46
3.47
3.47
3.47
3.48
1,250.000
3.48
3.49
3.49
3.49
3.50
1,275.000
3.50
3.51
3.51
3.51
3.52
1,300.000
3.52
3.53
3.53
3.53
3.54
1,325.000
3.54
3.54
3.55
3.55
3.56
1,350.000
3.56
3.56
3.57
3.57
3.58
1,375.000
3.58
3.58
3.59
3.59
3.60
1,400.000
3.60
3.60
3.61
3.61
3.61
1,425.000
3.62
3.62
3.63
3.63
(N/A)
5-yr
Label
5-yr
Increment
5.000 min
Return Event
5.00 years
End Time
1,440.000 min
Start Time
0.000 min
Storm Event Depth Type
Cumulative
5-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
0.000
0.00
0.01
0.01
0.02
0.02
25.000
0.03
0.03
0.04
0.04
0.05
50.000
0.05
0.06
0.06
0.07
0.07
75.000
0.08
0.08
0.09
0.09
0.10
100.000
0.10
0.11
0.11
0.12
0.12
125.000
0.13
0.13
0.14
0.14
0.15
150.000
0.15
0.16
0.16
0.17
0.17
175.000
0.18
0.18
0.19
0.19
0.20
200.000
0.20
0.21
0.21
0.22
0.22
225.000
0.23
0.23
0.24
0.24
0.25
250.000
0.25
0.26
0.26
0.27
0.27
275.000
0.28
0.28
0.29
0.29
0.30
300.000
0.30
0.31
0.31
0.32
0.32
325.000
0.33
0.33
0.34
0.34
0.35
350.000
0.35
0.36
0.36
0.37
0.38
375.000
0.39
0.39
0.40
0.41
0.42
400.000
0.43
0.44
0.45
0.45
0.46
425.000
0.47
0.48
0.49
0.50
0.50
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
5-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
450.000
0.51
0.52
0.53
0.54
0.55
475.000
0.56
0.56
0.57
0.58
0.59
500.000
0.60
0.61
0.61
0.62
0.63
525.000
0.64
0.65
0.66
0.67
0.68
550.000
0.69
0.71
0.72
0.74
0.75
575.000
0.77
0.78
0.80
0.81
0.83
600.000
0.84
0.86
0.87
0.89
0.90
625.000
0.92
0.93
0.94
0.96
0.97
650.000
0.99
1.00
1.02
1.05
1.08
675.000
1.11
1.14
1.17
1.20
1.31
700.000
1.42
1.53
1.64
1.94
2.53
725.000
2.83
2.93
3.04
3.15
3.26
750.000
3.37
3.40
3.43
3.46
3.49
775.000
3.52
3.56
3.57
3.58
3.60
800.000
3.61
3.63
3.64
3.66
3.67
825.000
3.68
3.70
3.71
3.73
3.74
850.000
3.76
3.77
3.79
3.80
3.82
875.000
3.83
3.85
3.86
3.88
3.89
900.000
3.91
3.91
3.92
3.93
3.94
925.000
3.95
3.96
3.96
3.97
3.98
950.000
3.99
4.00
4.01
4.02
4.02
975.000
4.03
4.04
4.05
4.06
4.07
1,000.000
4.07
4.08
4.09
4.10
4.11
1,025.000
4.12
4.13
4.13
4.14
4.15
1,050.000
4.16
4.17
4.18
4.19
4.19
1,075.000
4.20
4.21
4.22
4.22
4.23
1,100.000
4.23
4.24
4.24
4.25
4.25
1,125.000
4.26
4.26
4.27
4.27
4.28
1,150.000
4.28
4.29
4.29
4.30
4.30
1,175.000
4.31
4.31
4.32
4.32
4.33
1,200.000
4.33
4.34
4.34
4.35
4.35
1,225.000
4.36
4.36
4.37
4.37
4.38
1,250.000
4.38
4.39
4.39
4.40
4.40
1,275.000
4.41
4.41
4.42
4.42
4.43
1,300.000
4.43
4.44
4.44
4.45
4.45
1,325.000
4.46
4.46
4.47
4.47
4.48
1,350.000
4.48
4.49
4.49
4.50
4.50
1,375.000
4.51
4.51
4.52
4.52
4.53
1,400.000
4.53
4.54
4.54
4.55
4.55
1,425.000
4.56
4.56
4.57
4.57
(N/A)
1 0-yr
Label
10-yr
Increment
5.000 min
Return Event
10.00 years
End Time
1,440.000 min
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
1 0-yr
Start Time
0.000 min
Storm Event Depth Type
Cumulative
10-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
0.000
0.00
0.01
0.01
0.02
0.02
25.000
0.03
0.04
0.04
0.05
0.05
50.000
0.06
0.06
0.07
0.08
0.08
75.000
0.09
0.09
0.10
0.11
0.11
100.000
0.12
0.12
0.13
0.13
0.14
125.000
0.15
0.15
0.16
0.16
0.17
150.000
0.18
0.18
0.19
0.19
0.20
175.000
0.20
0.21
0.22
0.22
0.23
200.000
0.23
0.24
0.25
0.25
0.26
225.000
0.26
0.27
0.27
0.28
0.29
250.000
0.29
0.30
0.30
0.31
0.32
275.000
0.32
0.33
0.33
0.34
0.34
300.000
0.35
0.36
0.36
0.37
0.37
325.000
0.38
0.39
0.39
0.40
0.40
350.000
0.41
0.41
0.42
0.43
0.44
375.000
0.45
0.46
0.47
0.48
0.49
400.000
0.50
0.51
0.52
0.53
0.54
425.000
0.55
0.56
0.57
0.58
0.59
450.000
0.60
0.61
0.62
0.63
0.64
475.000
0.65
0.66
0.67
0.68
0.69
500.000
0.70
0.71
0.72
0.73
0.74
525.000
0.75
0.76
0.77
0.78
0.80
550.000
0.82
0.83
0.85
0.87
0.89
575.000
0.90
0.92
0.94
0.96
0.97
600.000
0.99
1.01
1.03
1.04
1.06
625.000
1.08
1.10
1.11
1.13
1.15
650.000
1.17
1.18
1.20
1.24
1.27
675.000
1.31
1.35
1.38
1.42
1.55
700.000
1.68
1.81
1.94
2.27
2.91
725.000
3.25
3.37
3.50
3.63
3.76
750.000
3.89
3.93
3.96
4.00
4.04
775.000
4.07
4.11
4.13
4.15
4.16
800.000
4.18
4.20
4.22
4.23
4.25
825.000
4.27
4.29
4.30
4.32
4.34
850.000
4.36
4.37
4.39
4.41
4.43
875.000
4.44
4.46
4.48
4.50
4.51
900.000
4.53
4.54
4.55
4.56
4.57
925.000
4.58
4.59
4.60
4.61
4.62
950.000
4.63
4.64
4.65
4.66
4.67
975.000
4.68
4.69
4.70
4.71
4.72
1,000.000
4.73
4.74
4.75
4.76
4.77
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
10-yr
Time Depth
Depth Depth
Depth
Depth
(min) (in)
(in) (in)
(in)
(in)
1,025.000 4.78
4.79
4.80
4.81
4.82
1,050.000 4.83
4.84
4.85
4.86
4.87
1,075.000 4.88
4.89
4.90
4.90
4.91
1,100.000 4.91
4.92
4.93
4.93
4.94
1,125.000 4.94
4.95
4.95
4.96
4.97
1,150.000 4.97
4.98
4.98
4.99
5.00
1,175.000 5.00
5.01
5.01
5.02
5.02
1,200.000 5.03
5.04
5.04
5.05
5.05
1,225.000 5.06
5.07
5.07
5.08
5.08
1,250.000 5.09
5.09
5.10
5.11
5.11
1,275.000 5.12
5.12
5.13
5.14
5.14
1,300.000 5.15
5.15
5.16
5.16
5.17
1,325.000 5.18
5.18
5.19
5.19
5.20
1,350.000 5.21
5.21
5.22
5.22
5.23
1,375.000 5.23
5.24
5.25
5.25
5.26
1,400.000 5.26
5.27
5.28
5.28
5.29
1,425.000 5.29
5.30
5.30
5.31
(N/A)
25-yr
Label
25-yr
Increment
5.000 min
Return Event
25.00 years
End Time
1,440.000 min
Start Time
0.000 min
Storm Event Depth Type
Cumulative
25-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
0.000
0.00
0.01
0.01
0.02
0.03
25.000
0.04
0.04
0.05
0.06
0.06
50.000
0.07
0.08
0.09
0.09
0.10
75.000
0.11
0.11
0.12
0.13
0.14
100.000
0.14
0.15
0.16
0.16
0.17
125.000
0.18
0.18
0.19
0.20
0.21
150.000
0.21
0.22
0.23
0.23
0.24
175.000
0.25
0.26
0.26
0.27
0.28
200.000
0.28
0.29
0.30
0.31
0.31
225.000
0.32
0.33
0.33
0.34
0.35
250.000
0.35
0.36
0.37
0.38
0.38
275.000
0.39
0.40
0.40
0.41
0.42
300.000
0.43
0.43
0.44
0.45
0.45
325.000
0.46
0.47
0.48
0.48
0.49
350.000
0.50
0.50
0.51
0.52
0.54
375.000
0.55
0.56
0.57
0.58
0.60
400.000
0.61
0.62
0.63
0.65
0.66
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
25-yr
Time
Depth Depth
Depth
Depth
Depth
(min)
(in) (in)
(in)
(in)
(in)
425.000
0.67
0.68
0.70
0.71
0.72
450.000
0.73
0.75
0.76
0.77
0.78
475.000
0.79
0.81
0.82
0.83
0.84
500.000
0.86
0.87
0.88
0.89
0.91
525.000
0.92
0.93
0.94
0.96
0.98
550.000
1.00
1.02
1.04
1.06
1.08
575.000
1.10
1.12
1.15
1.17
1.19
600.000
1.21
1.23
1.25
1.27
1.29
625.000
1.31
1.34
1.36
1.38
1.41
650.000
1.43
1.46
1.48
1.53
1.57
675.000
1.62
1.66
1.71
1.75
1.91
700.000
2.06
2.22
2.38
2.74
3.45
725.000
3.82
3.97
4.13
4.29
4.44
750.000
4.60
4.65
4.69
4.74
4.78
775.000
4.83
4.87
4.89
4.92
4.94
800.000
4.97
4.99
5.02
5.04
5.06
825.000
5.08
5.10
5.12
5.14
5.16
850.000
5.18
5.21
5.23
5.25
5.27
875.000
5.29
5.31
5.33
5.35
5.37
900.000
5.40
5.41
5.42
5.43
5.44
925.000
5.46
5.47
5.48
5.49
5.51
950.000
5.52
5.53
5.54
5.56
5.57
975.000
5.58
5.59
5.61
5.62
5.63
1,000.000
5.64
5.66
5.67
5.68
5.69
1,025.000
5.70
5.72
5.73
5.74
5.75
1,050.000
5.77
5.78
5.79
5.80
5.82
1,075.000
5.83
5.84
5.85
5.85
5.86
1,100.000
5.87
5.88
5.88
5.89
5.90
1,125.000
5.90
5.91
5.92
5.93
5.93
1,150.000
5.94
5.95
5.95
5.96
5.97
1,175.000
5.98
5.98
5.99
6.00
6.00
1,200.000
6.01
6.02
6.02
6.03
6.04
1,225.000
6.05
6.05
6.06
6.07
6.07
1,250.000
6.08
6.09
6.10
6.10
6.11
1,275.000
6.12
6.12
6.13
6.14
6.15
1,300.000
6.15
6.16
6.17
6.17
6.18
1,325.000
6.19
6.19
6.20
6.21
6.22
1,350.000
6.22
6.23
6.24
6.24
6.25
1,375.000
6.26
6.27
6.27
6.28
6.29
1,400.000
6.29
6.30
6.31
6.32
6.32
1,425.000
6.33
6.34
6.34
6.35
(N/A)
50-yr
Label
50-yr
Increment
5.000 min
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
50-yr
Return Event
50.00 years
End Time
1,440.000 min
Start Time
0.000 min
Storm Event Depth Type
Cumulative
50-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(i n)
(i n)
(i n)
(i n)
(i n)
0.000
0.00
0.01
0.02
0.02
0.03
25.000
0.04
0.05
0.06
0.06
0.07
50.000
0.08
0.09
0.10
0.11
0.11
75.000
0.12
0.13
0.14
0.15
0.15
100.000
0.16
0.17
0.18
0.19
0.19
125.000
0.20
0.21
0.22
0.23
0.23
150.000
0.24
0.25
0.26
0.27
0.27
175.000
0.28
0.29
0.30
0.31
0.31
200.000
0.32
0.33
0.34
0.35
0.35
225.000
0.36
0.37
0.38
0.39
0.40
250.000
0.40
0.41
0.42
0.43
0.44
275.000
0.44
0.45
0.46
0.47
0.48
300.000
0.48
0.49
0.50
0.51
0.52
325.000
0.52
0.53
0.54
0.55
0.56
350.000
0.56
0.57
0.58
0.60
0.61
375.000
0.62
0.64
0.65
0.67
0.68
400.000
0.70
0.71
0.73
0.74
0.76
425.000
0.77
0.78
0.80
0.81
0.83
450.000
0.84
0.86
0.87
0.89
0.90
475.000
0.92
0.93
0.95
0.96
0.97
500.000
0.99
1.00
1.02
1.03
1.05
525.000
1.06
1.08
1.09
1.11
1.13
550.000
1.15
1.18
1.20
1.22
1.25
575.000
1.27
1.29
1.32
1.34
1.37
600.000
1.39
1.41
1.44
1.46
1.48
625.000
1.51
1.53
1.56
1.59
1.63
650.000
1.66
1.69
1.72
1.77
1.82
675.000
1.88
1.93
1.98
2.03
2.21
700.000
2.39
2.56
2.74
3.13
3.89
725.000
4.27
4.45
4.63
4.80
4.98
750.000
5.16
5.21
5.26
5.32
5.37
775.000
5.42
5.47
5.50
5.53
5.57
800.000
5.60
5.63
5.66
5.68
5.71
825.000
5.73
5.75
5.78
5.80
5.83
850.000
5.85
5.87
5.90
5.92
5.94
875.000
5.97
5.99
6.01
6.04
6.06
900.000
6.09
6.10
6.11
6.13
6.14
925.000
6.16
6.17
6.19
6.20
6.22
950.000
6.23
6.25
6.26
6.28
6.29
975.000
6.30
6.32
6.33
6.35
6.36
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
50-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
1,000.000
6.38
6.39
6.41
6.42
6.44
1,025.000
6.45
6.46
6.48
6.49
6.51
1,050.000
6.52
6.54
6.55
6.57
6.58
1,075.000
6.60
6.61
6.62
6.63
6.63
1,100.000
6.64
6.65
6.66
6.67
6.67
1,125.000
6.68
6.69
6.70
6.71
6.72
1,150.000
6.72
6.73
6.74
6.75
6.76
1,175.000
6.76
6.77
6.78
6.79
6.80
1,200.000
6.80
6.81
6.82
6.83
6.84
1,225.000
6.84
6.85
6.86
6.87
6.88
1,250.000
6.88
6.89
6.90
6.91
6.92
1,275.000
6.92
6.93
6.94
6.95
6.96
1,300.000
6.96
6.97
6.98
6.99
7.00
1,325.000
7.01
7.01
7.02
7.03
7.04
1,350.000
7.05
7.05
7.06
7.07
7.08
1,375.000
7.09
7.09
7.10
7.11
7.12
1,400.000
7.13
7.13
7.14
7.15
7.16
1,425.000
7.17
7.17
7.18
7.19
(N/A)
1 00-yr
Label
100-yr
Increment
5.000 min
Return Event
100.00 years
End Time
1,440.000 min
Start Time
0.000 min
Storm Event Depth Type
Cumulative
100-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(i n)
(i n)
(i n)
(i n)
(i n)
0.000
0.00
0.01
0.02
0.03
0.04
25.000
0.05
0.06
0.06
0.07
0.08
50.000
0.09
0.10
0.11
0.12
0.13
75.000
0.14
0.15
0.16
0.17
0.17
100.000
0.18
0.19
0.20
0.21
0.22
125.000
0.23
0.24
0.25
0.26
0.27
150.000
0.28
0.28
0.29
0.30
0.31
175.000
0.32
0.33
0.34
0.35
0.36
200.000
0.37
0.38
0.39
0.39
0.40
225.000
0.41
0.42
0.43
0.44
0.45
250.000
0.46
0.47
0.48
0.49
0.50
275.000
0.50
0.51
0.52
0.53
0.54
300.000
0.55
0.56
0.57
0.58
0.59
325.000
0.60
0.61
0.61
0.62
0.63
350.000
0.64
0.65
0.66
0.68
0.69
375.000
0.71
0.73
0.74
0.76
0.78
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
100-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
400.000
0.79
0.81
0.83
0.84
0.86
425.000
0.88
0.89
0.91
0.93
0.94
450.000
0.96
0.98
0.99
1.01
1.03
475.000
1.04
1.06
1.08
1.09
1.11
500.000
1.13
1.14
1.16
1.18
1.19
525.000
1.21
1.23
1.24
1.26
1.29
550.000
1.31
1.34
1.37
1.40
1.42
575.000
1.45
1.48
1.51
1.53
1.56
600.000
1.59
1.61
1.64
1.67
1.70
625.000
1.72
1.75
1.79
1.83
1.86
650.000
1.90
1.94
1.98
2.04
2.10
675.000
2.16
2.22
2.28
2.34
2.53
700.000
2.73
2.93
3.13
3.53
4.34
725.000
4.74
4.94
5.14
5.34
5.54
750.000
5.74
5.80
5.86
5.92
5.98
775.000
6.04
6.10
6.13
6.17
6.21
800.000
6.25
6.28
6.32
6.35
6.37
825.000
6.40
6.43
6.46
6.48
6.51
850.000
6.54
6.57
6.59
6.62
6.65
875.000
6.67
6.70
6.73
6.76
6.78
900.000
6.81
6.83
6.84
6.86
6.88
925.000
6.89
6.91
6.93
6.94
6.96
950.000
6.98
6.99
7.01
7.03
7.04
975.000
7.06
7.08
7.09
7.11
7.13
1,000.000
7.14
7.16
7.18
7.19
7.21
1,025.000
7.23
7.24
7.26
7.28
7.29
1,050.000
7.31
7.33
7.34
7.36
7.38
1,075.000
7.39
7.41
7.42
7.43
7.44
1,100.000
7.45
7.46
7.47
7.47
7.48
1,125.000
7.49
7.50
7.51
7.52
7.53
1,150.000
7.54
7.55
7.56
7.57
7.58
1,175.000
7.58
7.59
7.60
7.61
7.62
1,200.000
7.63
7.64
7.65
7.66
7.67
1,225.000
7.68
7.69
7.69
7.70
7.71
1,250.000
7.72
7.73
7.74
7.75
7.76
1,275.000
7.77
7.78
7.79
7.80
7.80
1,300.000
7.81
7.82
7.83
7.84
7.85
1,325.000
7.86
7.87
7.88
7.89
7.90
1,350.000
7.91
7.91
7.92
7.93
7.94
1,375.000
7.95
7.96
7.97
7.98
7.99
1,400.000
8.00
8.01
8.02
8.02
8.03
1,425.000
8.04
8.05
8.06
8.07
(N/A)
500-yr
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
500-yr
Label
500-yr
Increment
5.000 min
Return Event
500.00 years
End Time
1,440.000 min
Start Time
0.000 min
Storm Event Depth Type
Cumulative
500-yr
Time
Depth Depth
Depth
Depth
Depth
(min)
(in) (in)
(in)
(in)
(in)
0.000
0.00
0.01
0.02
0.04
0.05
25.000
0.06
0.07
0.08
0.10
0.11
50.000
0.12
0.13
0.14
0.16
0.17
75.000
0.18
0.19
0.20
0.22
0.23
100.000
0.24
0.25
0.26
0.28
0.29
125.000
0.30
0.31
0.32
0.34
0.35
150.000
0.36
0.37
0.38
0.40
0.41
175.000
0.42
0.43
0.45
0.46
0.47
200.000
0.48
0.49
0.51
0.52
0.53
225.000
0.54
0.55
0.57
0.58
0.59
250.000
0.60
0.61
0.63
0.64
0.65
275.000
0.66
0.67
0.69
0.70
0.71
300.000
0.72
0.73
0.75
0.76
0.77
325.000
0.78
0.79
0.81
0.82
0.83
350.000
0.84
0.85
0.87
0.89
0.91
375.000
0.93
0.96
0.98
1.00
1.03
400.000
1.05
1.07
1.09
1.12
1.14
425.000
1.16
1.19
1.21
1.23
1.26
450.000
1.28
1.30
1.32
1.35
1.37
475.000
1.39
1.42
1.44
1.46
1.48
500.000
1.51
1.53
1.55
1.58
1.60
525.000
1.62
1.64
1.67
1.69
1.73
550.000
1.76
1.80
1.83
1.87
1.90
575.000
1.94
1.97
2.01
2.04
2.08
600.000
2.11
2.15
2.18
2.22
2.25
625.000
2.29
2.32
2.38
2.44
2.50
650.000
2.56
2.62
2.68
2.75
2.83
675.000
2.91
2.99
3.06
3.14
3.39
700.000
3.64
3.89
4.14
4.58
5.47
725.000
5.90
6.16
6.41
6.66
6.91
750.000
7.16
7.24
7.32
7.39
7.47
775.000
7.55
7.63
7.68
7.74
7.80
800.000
7.86
7.92
7.98
8.02
8.05
825.000
8.09
8.12
8.16
8.19
8.23
850.000
8.26
8.30
8.33
8.37
8.40
875.000
8.44
8.47
8.51
8.54
8.58
900.000
8.61
8.63
8.66
8.68
8.70
925.000
8.73
8.75
8.77
8.79
8.82
950.000
8.84
8.86
8.89
8.91
8.93
TRU1903O.ppc
TRU1903O.ppc
12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
500-yr
Time
Depth
Depth
Depth
Depth
Depth
(min)
(in)
(in)
(in)
(in)
(in)
975.000
8.95
8.98
9.00
9.02
9.05
1,000.000
9.07
9.09
9.11
9.14
9.16
1,025.000
9.18
9.21
9.23
9.25
9.28
1,050.000
9.30
9.32
9.34
9.37
9.39
1,075.000
9.41
9.44
9.45
9.46
9.47
1,100.000
9.48
9.50
9.51
9.52
9.53
1,125.000
9.54
9.56
9.57
9.58
9.59
1,150.000
9.60
9.62
9.63
9.64
9.65
1,175.000
9.66
9.68
9.69
9.70
9.71
1,200.000
9.72
9.74
9.75
9.76
9.77
1,225.000
9.78
9.80
9.81
9.82
9.83
1,250.000
9.84
9.86
9.87
9.88
9.89
1,275.000
9.90
9.92
9.93
9.94
9.95
1,300.000
9.96
9.98
9.99
10.00
10.01
1,325.000
10.02
10.04
10.05
10.06
10.07
1,350.000
10.08
10.10
10.11
10.12
10.13
1,375.000
10.14
10.16
10.17
10.18
10.19
1,400.000
10.20
10.22
10.23
10.24
10.25
1,425.000
10.26
10.28
10.29
10.30
(N/A)
TRU1903O.ppc
TRU1903O.ppc 12/21/2020

MCADAM
Storm Data Detailed
Report: Wingate
12.50
11.25
10.00
8.75
7.50
P
�7-
6.25
5.00
3.75
2.50
1.25
0.00
0.000
200.000 400.000 600.000 800.000 1,000.000 1,200.000 1,400.000
Time (min)
500-yr 100-yr 50-yr 25-yr 10-yr - 5-yr
2 yr 1 yr WQV
TRU1903O.ppc
TRU1903O.ppc 12/21/2020

PRE -DEVELOPMENT HYDROLOGIC
CALCULATIONS
The Glenns
TRU-1 9030

ME
tLISZ 'VNIIOdVD Hi�ON '31VE)NIAA
]ANG IJ�JODN319
S9NI/\AVWl NOuDmiSNNOD
0
SNN319 3Hi

LU
0 a_
0
>
n
0 C)
w 0
0
a) 0)
(D
E E

91MCADAMS
PRE DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name: The Glerms Date: 12/21/2020
Project Numbei TRU-1 9030 Calculated By: M. Duval, PE
Subbasin ID: 1
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HSG Impervious Open Wooded Pond
A
98
39
30
100
B
98
61
55
100
C
98
74
70
100
D
98
80
77
100
HSG:A 0 "'
HSG B: 0%
HSG'C'= 47%
HSG 'D' = 5 W3%
Cover Composite
Condition SCS CN Comments
Impervious
98
&E!
77
Assume good condition
ded
74
Assume good condition
Pond
100
WATERSHED BREAKDOWN
Composite Area Area
Contributing Area SCS CN Isf] [acresl Comments
Onsite Impervious
98
9,676
0.22
Onsite Open
77
0
0.00
Assume good condition
Onsite Wooded
74
595,225
13.66
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
66,533
1.53
Offsite Open
77
156,810
3.60
Assume good condition
Offsite Wooded
74
0
0.00
Assume good condition
r Offsite Pond
100
0
0.00
Total Area 828,244 sf
19.01 acres
Composite SCS CN 77
% Impervious 9.20�/_6_
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow --------7ft Segment 2: Concentrated Flow
Length = 100 Length = 890 ft
Upstream Elevation = 591.5 Upstream Elevation = 590.00 ft
Downstream Elevation = 590.00 ft Downstream Elevation = 572.00 ft
Height = 1.50 ft Height = 18.00 ft
Slope = 0.0150 ft/ft Slope = 0.0202 ft/ft
Manning's n = 0.40 wooded -light underbrush Paved? No
P (2-year/24-hour) = 3.63 inches (Wingate, NC) Velocity = 2.29 ft/sec
Segment Time = minutes Segment Time = minutes
Time of Concentration = 29.09 minutes
SCS Lag Time = 17.45 minutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q� = ((P-0.2 �S)2) / (P+0.8�S)
where,
Q* = direct runoff (inches)

21MCADAMS
PRE DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name: The Glerms
Project Numbe TRU-19030
Subbasin ID 2
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HSG Impervious Open Wooded Pond
A
98
39
30
100
B
98
61
100
C
98
74
70
100
D
98
80
77
100
HSG �A 0%
H SG B� 0%
HSG'C'= 58%
HSG'D'= [ 4 M2%
Cover Composite
Condition SCS CN Comments
Impervious
98
Open
Assume good condition
73
Assume good condition
Pond
Im
100
WATERSHED BREAKDOWN
Date 12/21/2020
Calculated By: M. Duval, PE
Composite Area Area
Contributing Area SCS CN [sf] [acres] Comments
Onsite Impervious
98
0
0.00
Onsite Open
77
0
0.00
Assume good condition
Onsite Wooded
73
162,035
3.72
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
77
0
0.00
Assume good condition
gffs,te Wooded
73
0
0.00
Assume good condition
Offste Pond
100
0
0.00
Total Area - 162,035 sf
3.72 acres
Composite SCS CN = 73
% Impervious = 0.00%
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow Segment 2: Concentrated Flow
Length = 100 ft Length = 380 ft
Upstream Elevation = 591.50 ft Upstream Elevation = 590.00 ft
Downstream Elevation = 590.00 ft Downstream Elevation = 581.00 ft
Height = 1.50 ft Height = 9.00 ft
Slope = 0.0150 ft/ft Slope = 0.0237 ftift
Manning's n = 0.40 wooded -light underbrush Paved? No
P (2-year/24-hour) - 363 inches (Wingate, NC) Velocity - 248 ft/sec
Segment Time = minutes Segment Time = minutes
Time of Concentration - 25.17 minutes
SCS Lag Time =1 15.10 m inutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q' = ((P-0.2 S)2)/ (P+0.8*S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1 OOO/CN) - 10
P = accumulated storm rainfall (inches)

21MCADAMS
PRE DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name: The Glerms
Project Numbe TRU-19030
Subbasin ID 3
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HSG IMDervious Coen Wooded Pond
A
98
39
30
100
B
98
61
100
C
98
74
70
100
D
98
80
77
100
HSG �A 0%
H SG B� 0%
HSG'C'= 13%
HSG'D'= [ 8 M7%
Cover Composite
Condition SCS CN Comments
Impervious
9§
1 -
Open
�9
Assume good condition
76
Assume good condition
Pond
Im
100
WATERSHED BREAKDOWN
Date 12/21/2020
Calculated By: M. Duval, PE
Composite Area Area
Contributina Area SCS CN rsfi racresl Comments
Onsite Impervious
98
0
0.00
Onsite Open
79
0
0.00
Assume good condition
Onsite Wooded
76
534,686
12.27
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
79
0
0.00
Assume good condition
2ffs,te Wooded
76
0
0.00
Assume good condition
Offste Pond
100
0
0.00
Total Area - 534,686 sf
12.27 acres
Composite SCS CN = 76
% Impervious = 0.00%
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow Segment 2: Concentrated Flow
Length = 100 ft Length = 936 ft
Upstream Elevation = 591.50 ft Upstream Elevation = 590.00 ft
Downstream Elevation = 590.00 ft Downstream Elevation = 570.00 ft
Height = 1.50 ft Height = 20.00 ft
Slope = 0.0150 ft/ft Slope = 0.0214 ft/ft
Manning's n = 0.40 wooded -light underbrush Paved? No
P (2-year/24-hour) - 363 inches (Wingate, NC) Velocity - 236 ft/sec
Segment Time = minutes Segment Time minutes
Segment 3: Channel Flow
Length = 513 ft
Upstream Elevation = 570.00 ft
Downstream Elevation = 560.50 ft
Height = 9.50 ft
Slope = 0.0185 ft/ft
Manning's n = 0.045 natural channel
Flow Area - 6 sf (assume 2'x3' channel)
Wetted Permeter= 7 If (assume 2'x3' channel)
Channel Velocity 4.07 ft/sec
Segment Time 2.10 minutes
Time of Concentration - 31.34 minutes
SCS Lag Time =1 18.80 m inutes

0 MCADAMS
19 111:1 BUYN 0] go 1:10 Is: k1J 11 111111111" 14teril 114111 W11 HQ LIM
Project Name: The Glerms
Project Numbei TRU-1 9030
Subbasin ID 4
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HS C, 1--in", C)npn W-1-1 PnnrI
A
98
39
30
100
B
98
61
55
100
C
98
74
70
100
D
98
80
77
100
HSG �A 0%
HSG B� 0%
HSG'C'= 0%
HSG'D'= [i 1 E00%
Cover Composite
C',ndifinn 1qC1_q CIN
Impervious
98
Open
80
Assume good condition
Wooded
77
Assume good condition
Pond
100
WATERSHED BREAKDOWN
Date 12/21/2020
Calculated By: M. Duval, PE
Composite Area Area
ContrihiAinn Arp.a SCS CN rqfl ranrp.ql Cnnnnnp.nts
Onsite Impervious
98
0
0.00
Onsite Open
80
0
0.00
Assume good condition
Onsite Wooded
77
61,841
1.42
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
80
0
0.00
Assume good condition
Offsite Wooded
77
0
0.00
Assume good condition
Off ite Pond
100
0
0.00
Offsite 2-ac Lots
0
1 0
1 0.00
Assume 12% impervious
Total Area - 61,841 sf
1.42 acres
Composite SCS CN = 77
% Impervious = 0.00%
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow ­770— ft Segment 2: Concentrated Flow
Length = Length - 168 ft
Upstream Elevation = 586.00 ft Upstream Elevation = 581.50 ft
Downstream Elevation = 581.50 ft Downstream Elevation = 575.00 ft
Height = 4.50 ft Height = 6.50 ft
Slope = 0.0450 ft/ft Slope = 0.0387 ft/ft
Manning's n = 0.40 wooded -light underbrush Paved? No
P (2-year/24-hour) - 3.63 inches (Wingate, NC) Velocity = 3.17 ft/sec
Segment Time = minutes Segment Time = minutes
Time of Concentration - L5�46 minu es
SCS Lag Time 9 . 8 d minutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q* = ((P-0.2 *S)2) / (P+0.8*S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1000/CN) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A = acres

0 McADAMS
PRE DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name: The Glenns
Project Numbei TRU-1 9030
Subbasin ID: 5
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HSG Impervious Open Wooded Pond
HSG'A'=
HSG'B'=
HSG'C'=
HSG'D'=
Cover
Composite
C'nnditinn
SCS CN
C'nmmpnt.-,
Impervious
98
77
Open
Assume good condition
Wooded
73
Assume good condition
Pond
100
WATERSHED BREAKDOWN
Date: 12/21/2020
Calculated By: M. Duval, PE
Composite Area Area
Contributina Area SCS CN Isf! Facres'! Comments
Onsite Impervious
98
4,596
0.11
Onsite Open
77
0
0.00
Assume good condition
Onsite Wooded
73
674,022
16.47
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
77
U
0.00
Assume good condition
Offsite Wooded
73
0
0.00
Assume good condition
Offsite Pond
100
0
0.00
Offsite 2-ac Lots
0
0
0.00
Assume 12% impervious
Total Area 678,618 sf
16.68 acres
Composite SCS CN 74
% Impervious= F-0.68%
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow
Length =
100
ft
Upstream Elevation =
594.50
ft
Downstream Elevation =
593.50
ft
Height =
1.00
ft
Slope =
0.0100
ft/ft
Manning's n - 0.40 lwooded-light underbrush
P (2-year/24-hour) = 3.63 dinches (Wingate, NC)
Segment Time = 26.60 minutes
Segment 2: Concentrated Flow
Length =
1045
ft
Upstream Elevation =
593.50
ft
Downstream Elevation =
571.00
ft
Height =
22.60
ft
Slope =
0.0216
ft/ft
Paved?
No
Velocity =
2.37
ft/sec
Segment Time =
7.36
�minutes

9 MCADAM
Scenario: Pre I yr
SU[-lSU -2 SU[-3 SU -4 su -5
U nIF
POA 1 POA 2 POA 3 POA 4 POA 5
TRU1903O.ppc
TRU1903O.ppc 12/21/2020

9 MCADAM
Subsection: Master Network Summary
Catchments Summary
Label Scenario Return Hydrograph Time to Peak Peak Flow
Event Volume (min) (ft3/S)
(years) (ft3)
SUB-1
Pre 1 yr
1.00
73,666.000
738.000
16.12
SUB-1
Pre 10 yr
10.00
197,476.000
738.000
41.27
SUB-1
Pre 25 yr
25.00
259,318.000
738.000
51.08
SUB-1
Pre 50 yr
50.00
310,784.000
738.000
58.32
SUB-1
Pre 100 yr
100.00
365,730.000
738.000
65.21
SUB-2
Pre 1 yr
1.00
11,560.000
735.000
2.62
SUB-2
Pre 10 yr
10.00
33,882.000
735.000
7.64
SUB-2
Pre 25 yr
25.00
45,365.000
735.000
9.67
SUB-2
Pre 50 yr
50.00
55,013.000
735.000
11.18
SUB-2
Pre 100 yr
100.00
65,383.000
735.000
12.62
SUB-3
Pre 1 yr
1.00
45,018.000
741.000
9.27
SUB-3
Pre 10 yr
10.00
123,321.000
738.000
24.54
SUB-3
Pre 25 yr
25.00
162,714.000
738.000
30.69
SUB-3
Pre 50 yr
50.00
195,576.000
738.000
35.26
SUB-3
Pre 100 yr
100.00
230,715.000
738.000
39.64
SUB-4
Pre 1 yr
1.00
5,527.000
729.000
1.74
SUB-4
Pre 10 yr
10.00
14,805.000
729.000
4.27
SUB-4
Pre 25 yr
25.00
19,439.000
729.000
5.20
SUB-4
Pre 50 yr
50.00
23,295.000
729.000
5.87
SUB-4
Pre 100 yr
100.00
27,413.000
729.000
6.50
SUB-5
Pre 1 yr
1.00
51,094.000
744.000
9.72
SUB-5
Pre 10 yr
10.00
146,401.000
741.000
27.81
SUB-5
Pre 25 yr
25.00
195,068.000
741.000
35.28
SUB-5
Pre 50 yr
50.00
235,866.000
741.000
40.89
SUB-5
Pre 100 yr
100.00
279,635.000
741.000
46.32
Node Summary
Label Scenario Return Hydrograph Time to Peak Peak Flow
Event Volume (min) (ft3/S)
(years) (ft3)
POA 1
Pre 1 yr
1.00
73,666.000
738.000
16.12
POA 1
Pre 10 yr
10.00
197,476.000
738.000
41.27
POA 1
Pre 25 yr
25.00
259,318.000
738.000
51.08
POA 1
Pre 50 yr
50.00
310,784.000
738.000
58.32
POA 1
Pre 100 yr
100.00
365,730.000
738.000
65.21
POA 2
Pre 1 yr
1.00
11,560.000
735.000
2.62
POA 2
Pre 10 yr
10.00
33,882.000
735.000
7.64
POA 2
Pre 25 yr
25.00
45,365.000
735.000
9.67
POA 2
Pre 50 yr
50.00
55,013.000
735.000
11.18
POA 2
Pre 100 yr
100.00
65,383.000
735.000
12.62
POA 3
Pre 1 yr
1.00
45,018.000
741.000
9.27
POA 3
Pre 10 yr
10.00
123,321.000
738.000
24.54
POA 3
Pre 25 yr
25.00
162,714.000
738.000
30.69
POA 3
Pre 50 yr
50.00
195,576.000
738.000
35.26
TRU1903O.ppc
TRU1903O.ppc 12/21/2020

9 MCADAM
Subsection: Master Network Summary
Node Summary
Label
Scenario
Return
Hydrograph
Time to Peak
Peak Flow
Event
Volume
(min)
(ft3/S)
(years)
(ft3)
POA 3
Pre 100 yr
100.00
230,715.000
738.000
39.64
POA 4
Pre 1 yr
1.00
5,527.000
729.000
1.74
POA 4
Pre 10 yr
10.00
14,805.000
729.000
4.27
POA 4
Pre 25 yr
25.00
19,439.000
729.000
5.20
POA 4
Pre 50 yr
50.00
23,295.000
729.000
5.87
POA 4
Pre 100 yr
100.00
27,413.000
729.000
6.50
POA 5
Pre 1 yr
1.00
51,094.000
744.000
9.72
POA 5
Pre 10 yr
10.00
146,401.000
741.000
27.81
POA 5
Pre 25 yr
25.00
195,068.000
741.000
35.28
POA 5
Pre 50 yr
50.00
235,866.000
741.000
40.89
POA 5
Pre 100 yr
100.00
279,635.000
741.000
46.32
TRU1903O.ppc
TRU1903O.ppc 12/21/2020

POST -DEVELOPMENT HYDROLOGIC
CALCULATIONS
The Glenns
TRU-1 9030

Z�
tLISZ 'VNIIOdVD Hi�ON '31VE)NIAA
2
]ANG IJ�JODN319
S9NI/\AVWl NOuDmiSNNOD
-0
Iz
SNN319 3Hi
Ox
0—
ID
U T
71
T -�-1

LU
a_
0 >
n
0 C)
w 0
0
a) 0)
(D
E E

'91 McADAMS
POST DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name The Glerms
Project N umbe I TRU-19030
Subbasin ID: 1-Bypass
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HSG
Impervious
Open
Wooded
Pond
A
1 2
3�O
100
B
9:
'J
100
C
98
74
70
100
D
98
80
77
100
HSG �A 0%
HSG B� o
0./
HSG C­ 4F7—OYo
HSG'D'= 53%
Cover Composite
Condition SCS CN Comments
Im ry ous
9§
9�ein
77
Assume good condition
Wooded
74
Assume good condition
Pond
100
1 -
WATERSHED BREAKDOWN
Date 3/17/2021
Calculated By: M. Duval, PE
Composite Area Area
Contributina Area SCS CN rsfl racresl Comments
Onsite Impervious
98
0
0.00
Onsite Open
77
25,368
0.58
Assume good condition
Onsite Wooded
74
0
0.00
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
77
0
0.00
Assume good condition
Offsite Wooded
74
0
0.00
Assume good condition
Offsite Pond
100
0
0.00
Total Area - 25,368 sf
- 0.58 acres
Composite SCS CN -
%Impervious=M
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow
Length
= 100
ft
Upstream Elevation
= 573.25
ft
Downstream Elevation
= 572.00
ft
Height
= T2_5
ft
Slope
= 00125
fuft
Manning's n
= 0.40
wooded -light underbrush
P (2-year/24-hour)
= 363
inches (Wingate, NC)
Segment Time
=1 24.33
minutes
Time of Concentration - minutes
SCS Lag Time =1 14.60 minutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q� = ((P-0.2 �S) 2) / (P+0.8�S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1 OOO/CN) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A
-
acres
Onsite SCS CN
77
acres
S
:?@
P (1-year/24-IhOUr)
- 01
inches
Q�
= 1.09
inches
Onsite Runoff Volume
-
acre-ft
=1 2,301
cf

0 MCADAMS
POST DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name: The Glenns
Project Numbei TRIJ-1 9030
Subbasin ID 1-To SCM A
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HRC, I mnpn/ini i.q nnpn \A/nnripri Pnnri
A
98
39
30
100
B
98
61
55
100
C
98
74
70
100
D
98
80
77
100
HSG �A
H SG B�
HSG'C'=
HSG'D'=W
Cover Composite
(--nrfifi— q(-.q (-.Nl
Impervious
98
Open
77
Assume good condition
Wooded
74
Assume good condition
Pond
100
WATERSHED BREAKDOWN
Date 3/17/2021
Calculated By: M. Duval, PE
Composite Area Area
Cnntrihiifinn ArPA SCIS CN rqfi rAr.rpql C.nmmpnt.q
Onsite Impervious
98
318,873
7.32
Onsite Open
77
535,839
12.30
Assume good condition
Onsite Wooded
74
0
0.00
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
66,533
1.53
Offsite Open
77
156,810
3.60
Assume good condition
0 Lfsite coded
74
2
2 2
Assume good condition
offslt��
Pond
Too
0
0�2
00
Total Area
- 1,078,055
sf
24.75
acres
Composite SCS CN
= 85
% Impervious
= 35.75�Xo—
TIME OF CONCENTRATION
Time of Concentration - 5.00 minutes
SCS Lag Time = 3.00 minutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q� = ((P-0. 2*S) 2) / (P+0.8*S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1000/CN) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A - 24,75 acres
Onsite SCS CN = 85 acres
S =
1.82
P (1-year/24-hour) -
3.01
� *ches
inches
Q* =
1.57
Onsite Runoff Volume -
acre-ft
cf

2 MCADAMS
POST DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name: The Glenns
Project Numbe TRU-19030
Subbasin ID 2
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HSC� Imnprvinti.q C)npn WnndPd Pnnd
A
98
39
30
100
B
98
61
55
100
C
98
74
70
100
D
98
80
77
100
HSG �A
0%
HSG B�
0%
HSG'C'=
58%
[ M42%
HSG'D'=
Cover
Composite
(-nnclitinn
SCS (-N (-nmmpnt.q
Impervious
98
Open
77
Assume good condition
Wooded
73
Assume good condition
Pond
100
WATERSHED BREAKDOWN
Date 3/17/2021
Calculated By: M. Duval, PE
Composite Area Area
(�.nntrihiifinn A— (-.N I r�fi r—r-1 (---mPntQ
Onsite Impervious
98
10,234
0.23
Onsite Open
77
20,004
0.46
Assume good condition
Onsite Wooded
73
0
0.00
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
77
0
0.00
Assume good condition
Offsite Wooded
73
0
0.00
Assume good condition
F- Offsite Pond ------
F-100
0
F - - - 0--00---F-
Total Area
- 30,238
sf
0.69
acres
Composite SCS CN
= 84
% Impervious
= 33.84%
TIME OF CONCENTRATION
Time of Concentration - 5.00 minutes
SCS Lag Time = 3.00 minutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q- = ((P-0.2 -S)2)/ (P+0.8*S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1 OOO/CN) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A
- 0.69
acr s
Onsite SCS CN
= 84 —�
acres
S
= 1.93
P (1-year/24-hou r)
- 3.01
linches
inc es
Q*=J
1.51
Onsite Runoff Volume
-
acre-ft
=1 3,804
cf

91MCADAMS
POST DEVELOPMENT HYDROLOGIC CALCULATIONS
Projec IName TheGI enns Date 3/17/2021
Projec Numbe TRU-19030 Calculated By: M. Duval, PE
Subbasin ID 3
SCS CURVE NUMBER
(REF TR-55 and NRCS Web Soil Sumay).
HSG crDervious ODen Wooded Pond
98
32
100
B
98
61
100
rA
C
98
71
70
D
98
go
77
HSG �A
HSG B�
HSG 'C'-
HSG D­
Cover Composite
Condition SCS CN Comments
impervious
98
Open
79
Assume good condition
Wooded
76
Assume good condition
Pond
100
WATERSHED BREAKDOWN
Composite Area Area
Contributina Area SCS CN Isf! racresl Comments
Ons,te no ous
m
98
15,383
0.35
6nsih_
te en
79
45,919
1.05
Assume good condition
Onsite Wooded
76
293,466
6.74
Assume good condition
Onsite Pond
100
0
0.00
05s,te 'm 'ous
98
0
0.00
Offs ite� �en
79
0
0.00
Assume good condition
Offsite Wooded
76
0
0.00
Assume good condition
Offsite Pond
100
___2_jjEj
0.00
Total Area - 354768 sf
- 8.14 acres
Composite SCS CN - 77
% Impervious = � 4.34%�
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow Segment 2: Concentrated Flow
Len g th = 100 ft Len gth = 323 ft
Upstream E I evation = 581.50 ft Upstream E I evation = 578.00 ft
Downstream Elevation = 578.00 ft Do -stream Elevation = 570.00 ft
Height = 3.50 ft Height = 8.00 ft
SI ope = 0.0350 ft/ft Slope = 0.0248 ft/ft
Manning 's n = 0.40 wooded -light underbrush Paved? No
P (2-year/24-h ou r) - 3.63 inches (Wingate, NC) Velocity = 2.54 fl/sec
Segm ent Ti m e = 16.12 minutes Segm ent Time = 2.12 minutes
Segment 3: Channel Flow
Len g th = 513 ft
Upstream E I evation = 570.00 ft
Downstream Elevation = 560.50 ft
Height = 9.50 ft
S, ope = 0.0185 ft/ft
Manning 's n = 0.045 natural channel
Flow Area = 6 sf (assume 2'x3' channel)
Wetted Perimeter - 7 If (assume 2'x3' channel)
Channel Vel ocity - �O7 fl/ ec
Segment Ti m e=� 2.1 0 minutes
Time of Concentration = minules
SCS Lag Time = 1 12.20 minu es
RUNOFF VOLUME CALCULATIONS
Runoffvolurce calculations are basedupon the SCS Method
Q� = ((P-0.2�S )2)/ (P10.8*S)
where,
Q* - direct runoff (inches)
S = P otential abstraction = (1 000/Cls) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A acres
Onsite SCS CN 77 acres
S_ 2.91
P (1-year/24-hour) - 3.01 inches
Q* 1.10 inches
Onsite Runoff Volume acre-ft
cf

M McADAMS
POST DEVELOPMENT HYDROLOGIC CALCULATIONS
ProjectName TheGlerms
Project N um be , TRU-19030
Subbasin ID 4
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
HSG Impervious Open Wooded Pond
A
32
30 :::::p22
0
B
100
C
98
74
70
100
F001
D
98
80
77
100
HSG �A
2—
0;
HSG B�
o
R
HSG'C'=
0%
HSG'D'=
100%
Cover
­­i­
Composite
­Q — I --
Impervious
98
Open
80
Assume g
Wooded
77
Assume g
Pond
100
WATERSHED BREAKDOWN
Date 3/17/2021
Calculated By: M. Duval, PE
Composite Area Area
r'.­trih,fi­ Ar— qrl..q r1.1\1 1�fl N-1 r­M­t�
Onsite Impervious
98
0
0.00
Onsite Open
80
40,765
0.94
Assume good condition
Onsite Wooded
77
18,300
0.42
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
80
0
0.00
Assume good condition
Offsite Wooded
77
0
0.00
Assume good condition
si�e Po�d
C:
120
0
2
20 20
_T
EF te 2 c
, Lots
0
0
0!
Assume 12% impervious
Total Area 5
:c res
Composite SCS CN
% Impervious 0.00%
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Segment 1: Overland Flow Segment 2: Concentrated Flow
Length -
100 ft Length = 168 ft
Upstream Elevation = 582.00 ft Upstream Elevation = 578.50 ft
Downstream Elevation = 578.50 ft Downstream Elevation = 575.00 ft
Height = 3.50 ft Height = 3.50 ft
Slope = 00350 ft/ft Slope = 0.0208 ft/ft
Manning's n = 0.40 wooded -light underbrush Paved? No
P (2-year/24-hour) = 3.63 inches (Charlotte, NC) Velocity = 2.33 ft/sec
Segment Time = 16.12 minutes Segment Time = 1.20 minutes
Time of Concentration - minutes
SCS Lag Time = 1 10.39 minutes
RUNOFF VOLUME CALCULATIONS
Runoffvolume calculations are based upon the SCS Method
Q- = ((P-0. 2-S)2) / (p+0 8-S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1000/CN) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A
-
acres
Onsite SCS CN
= 1 79
acres
S_
2.65
P (11-year/24-hour)
- 3.01
inches
Q*
= 1 1.20 linches
Onsite Runoff Volume
- 0.14
acre-ft
= 1 5,907 Jcf

MWADAMS
POST DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name The Glenna
Project NumberTRU-19030
Subbasin ID: 5-Bypass
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
Pqr 1--i-­ n­ W—H.H P—H
98
39
30
100
B
98
61
55
100
C
98
74
70
100
D
98
80
77
100
HSG�A�-�
U%
HSG B
- o
HSG C.
-
HSG . D.
=
Cover
Composite
C',ndifinn
R C..q C1. N C,mm—N
1 ImpervLous
1 98
0 pen
77
Assume good condition
Wooded
73
Assume good condition
Pond
100
1 -
WATERSHED BREAKDOWN
Date 3/17/2021
Calculated By: M. Duval, PE
Composite Area Area
r'.—trih,ti— A qr'..q rI.N I F�fl F—r-1 r,­nt�
Onsite Impervious
98
0
0.00
Onsite Open
77
19,156
0.44
Assume good condition
Onsite Wooded
73
99,832
2.29
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
77
0
0.00
Assume good condition
Offsite Wooded
73
0
0.00
Assume good condition
Offsite Pond
100
0
0.00
Total Area 88 :f
Composite SCS CN �4 cres
% Impervious 0.00%
TIME OF CONCENTRATION
Segment 1: Overland Flow Segment 2: Concentrated Flow
Length = 100 ft Length = 668 ft
Upstream Elevation = 591.00 ft Upstream Elevation = 589.50 ft
Downstream Elevation = 589.50 ft Downstream Elevation = 578.00 ft
Height = 1.50 ft Height = 11.50 ft
Slope = 0.0150 ft/ft Slope = 0.0172 fuft
Manning's n = 0.40 wooded -light underbrush Paved? No
P (2-year/24-hour) = 363 inches (Wingate, NC) Velocity = 2.12 fUsec
Segment Time = 22.62 minutes Segment Time = 5.26 minutes
Time of Concentration - 27.88 minute
SCS Lag Time = 16.73 minutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q- = ((P-0.2-S)2) / (p+0 8-S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1000/CN) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A - acres
Onsite SCS CN 74 acres
S :21
P (1-year/24-hour) - 01 inches
Q� = 0.91 inches
Onsite Runoff Volume - acre-ft
= 1 9,066 cf

21MCADAMS
POST DEVELOPMENT HYDROLOGIC CALCULATIONS
Project Name: The Glerms
Project Numbe TRU-19030
Subbasin ID 5- To SCM B
SCS CURVE NUMBER
(REF: TR-55 and NRCS Web Soil Survey).
p.q(- I m n—Ani i� (-)npn W-1-1 P-1
A
98
39
30
100
B
98
61
55
100
C
98
74
70
100
D
98
80
77
100
HSG �A
0%
H SG B�
0%
HSG'C'=
51%
[ M9%
HSG'D'=
4
Cover Composite
(--nrlitinn q(-.q (-.r\l (�--nt�
Impervious
98
Open
77
Assume good condition
Wooded
73
Assume good condition
Pond
100
WATERSHED BREAKDOWN
Date 3/17/2021
Calculated By: M. Duval, PE
Composite Area Area
C'.nntrihiffinn ArPR SCIS CIN rqfi rRr.rpql C.nmmpnt.q
Onsite Impervious
98
279,679
6.42
Onsite Open
77
319,262
7.33
Assume good condition
Onsite Wooded
73
0
0.00
Assume good condition
Onsite Pond
100
0
0.00
Offsite Impervious
98
0
0.00
Offsite Open
77
0
0.00
Assume good condition
2ffs,te coded
73
Assume good conditi
Pond
offs't�
00
0
0!2
00
Offsite 2-ac Lots
0
0
0.00
Assume 12% impervious
Total Area
- 598,941
sf
13.75
acres
Composite SCS CN
= 87
% Impervious
= 46.70�/�o
TIME OF CONCENTRATION
(REF: SCS Segmental Approach, TR-55).
Time of Concentration - 5 99 minutes
SCS Lag Time = 3�00 minutes
RUNOFF VOLUME CALCULATIONS
Runoff volume calculations are based upon the SCS Method
Q' = ((P-0.2 S)2)/ (P+0.8*S)
where,
Q* = direct runoff (inches)
S = potential abstraction = (1 OOO/CN) - 10
P = accumulated storm rainfall (inches)
Onsite Drainage Area, A
- 13,75
acres
Onsite SCS CN
= 87
acres
S-
1.52
P (1-year/24-hour)
- 3.01
�inches
inch s
Q*1
1.73
Onsite Runoff Volume
-
acre-ft
=1 86,361
cf

9 MCADAM
Scenario: Post I yr
POA2 POA3 POA4
9 1-BY ASS
TRU1903O.ppc
TRU1903O.ppc 12/21/2020

9 MCADAM
Subsection: Master Network Summary
Catchments Summary
Label Scenario Return Hydrograph Time to Peak Peak Flow
Event Volume (min) (ft3/S)
(years) (ft3)
1-BYPASS
WQV
0.10
400.000
733.000
0.07
1-BYPASS
Post 1 yr
1.00
2,259.000
735.000
0.55
1-BYPASS
Post 10 yr
10.00
6,055.000
735.000
1.38
1-BYPASS
Post 25 yr
25.00
7,951.000
735.000
1.71
1-BYPASS
Post 50 yr
50.00
9,529.000
735.000
1.94
1-BYPASS
Post 100 yr
100.00
11,214.000
735.000
2.16
2
WQV
0.10
477.000
721.000
0.16
2
Post 1 yr
1.00
2,712.000
723.000
1.21
2
Post 10 yr
10.00
7,258.000
720.000
2.94
2
Post 25 yr
25.00
9,529.000
720.000
3.59
2
Post 50 yr
50.00
11,418.000
720.000
4.06
2
Post 100 yr
100.00
13,436.000
720.000
4.49
3
WQV
0.10
5,597.000
729.000
1.05
3
Post 1 yr
1.00
31,679.000
732.000
8.59
3
Post 10 yr
10.00
84,863.000
732.000
21.49
3
Post 25 yr
25.00
111,422.000
732.000
26.34
3
Post 50 yr
50.00
133,518.000
732.000
29.86
3
Post 100 yr
100.00
157,114.000
732.000
33.17
4
WQV
0.10
1,161.000
727.000
0.28
4
Post 1 yr
1.00
5,853.000
729.000
1.76
4
Post 10 yr
10.00
15,045.000
729.000
4.14
4
Post 25 yr
25.00
19,573.000
729.000
5.00
4
Post 50 yr
50.00
23,324.000
729.000
5.63
4
Post 100 yr
100.00
27,318.000
729.000
6.20
5-BYPASS
WQV
0.10
1,300.000
736.000
0.15
5-BYPASS
Post 1 yr
1.00
8,978.000
738.000
1.93
5-BYPASS
Post 10 yr
10.00
25,712.000
738.000
5.43
5-BYPASS
Post 25 yr
25.00
34,257.000
735.000
6.85
5-BYPASS
Post 50 yr
50.00
41,419.000
735.000
7.92
5-BYPASS
Post 100 yr
100.00
49,103.000
735.000
8.95
1-TO SCM A
WQV
0.10
37,784.000
716.000
15.50
1-TO SCM A
Post 1 yr
1.00
143,260.000
720.000
67.18
1-TO SCM A
Post 10 yr
10.00
328,041.000
720.000
133.71
1-TO SCM A
Post 25 yr
25.00
415,821.000
720.000
155.74
1-TO SCM A
Post 50 yr
50.00
487,692.000
720.000
171.14
1-TO SCM A
Post 100 yr
100.00
563,656.000
720.000
184.91
5-TO SCM B
WQV
0.10
25,003.000
716.000
10.55
5-TO SCM B
Post 1 yr
1.00
87,135.000
720.000
41.19
5-TO SCM B
Post 10 yr
10.00
192,455.000
720.000
78.08
5-TO SCM B
Post 25 yr
25.00
241,961.000
720.000
90.00
5-TO SCM B
Post 50 yr
50.00
282,366.000
720.000
98.29
5-TO SCM B
Post 100 yr
100.00
324,985.000
720.000
105.67
Node Summary
TRU1903O.ppc

9 MCADAM
Subsection: Master Network Summary
Node Summary
Label Scenario Return Hydrograph Time to Peak Peak Flow
Event Volume (min) (ft3/S)
(years) (ft3)
POA 1
WQV
0.10
35,016.000
733.000
0.19
POA 1
Post 1 yr
1.00
102,359.000
756.000
6.75
POA 1
Post 10 yr
10.00
286,554.000
732.000
38.97
POA 1
Post 25 yr
25.00
374,089.000
732.000
50.99
POA 1
Post 50 yr
50.00
445,861.000
732.000
55.26
POA 1
Post 100 yr
100.00
521,600.000
735.000
58.93
POA 2
WQV
0.10
477.000
721.000
0.16
POA 2
Post 1 yr
1.00
2,712.000
723.000
1.21
POA 2
Post 10 yr
10.00
7,258.000
720.000
2.94
POA 2
Post 25 yr
25.00
9,529.000
720.000
3.59
POA 2
Post 50 yr
50.00
11,418.000
720.000
4.06
POA 2
Post 100 yr
100.00
13,436.000
720.000
4.49
POA 3
WQV
0.10
5,597.000
729.000
1.05
POA 3
Post 1 yr
1.00
31,679.000
732.000
8.59
POA 3
Post 10 yr
10.00
84,863.000
732.000
21.49
POA 3
Post 25 yr
25.00
111,422.000
732.000
26.34
POA 3
Post 50 yr
50.00
133,518.000
732.000
29.86
POA 3
Post 100 yr
100.00
157,114.000
732.000
33.17
POA 4
WQV
0.10
1,161.000
727.000
0.28
POA 4
Post 1 yr
1.00
5,853.000
729.000
1.76
POA 4
Post 10 yr
10.00
15,045.000
729.000
4.14
POA 4
Post 25 yr
25.00
19,573.000
729.000
5.00
POA 4
Post 50 yr
50.00
23,324.000
729.000
5.63
POA 4
Post 100 yr
100.00
27,318.000
729.000
6.20
POA 5
WQV
0.10
23,274.000
740.000
0.23
POA 5
Post 1 yr
1.00
49,497.000
756.000
2.90
POA 5
Post 10 yr
10.00
168,878.000
753.000
17.55
POA 5
Post 25 yr
25.00
225,639.000
741.000
28.99
POA 5
Post 50 yr
50.00
272,204.000
732.000
39.88
POA 5
Post 100 yr
100.00
321,374.000
732.000
49.54
Pond Summary
Label Scenario Return Hydrograph Time to Peak Peak Flow
Event Volume (min) (ft3/S)
(years) (ft3)
Maximum
Maximum
Water
Pond Storage
Surface
(ft3)
Elevation
(ft)
SCM A (IN)
WQv
0.10
37,784.000
716.000
15.50
(N/A)
(N/A)
SCM A
(OUT)
WQV
0.10
34,615.000
1,442.000
0.18
573.27
30,332.000
SCM A (IN)
Post 1 yr
1.00
143,260.000
720.000
67.18
(N/A)
(N/A)
SCM A
(OUT)
Post 1 yr
1.00
100,100.000
756.000
6.45
574.35
76,933.000
SCM A (IN)
Post 10 yr
10.00
328,041.000
720.000
133.71
(N/A)
(N/A)
TRU1903O.ppc
TRU1903O.ppc
3/17/2021

9 MCADAM
Subsection: Master Network Summary
Pond Summary
Label
Scenario
Return Hydrograph
Time to Peak
Peak Flow
Maximum
Maximum
Event Volume
(min)
(ft3/S)
Water
Pond Storage
(years) (ft3)
Surface
(ft3)
Elevation
(ft)
SCM A
(OUT)
Post 10 yr
10.00 280,500.000
732.000
37.60
575.76
142,430.000
SCM A (IN)
Post 25 yr
25.00 415,821.000
720.000
155.74
(N/A)
(N/A)
SCM A
(OUT)
Post 25 yr
25.00 366,138.000
732.000
49.29
576.28
167,888.000
SCM A (IN)
Post 50 yr
50.00 487,692.000
720.000
171.14
(N/A)
(N/A)
SCM A
(OUT)
Post 50 yr
50.00 436,332.000
732.000
53.32
576.70
188,882.000
SCM A (IN)
Post 100 yr
100.00 563,656.000
720.000
184.91
(N/A)
(N/A)
SCM A
(OUT)
Post 100 yr
100.00 510,386.000
735.000
56.76
577.08
208,521.000
SCM B (IN)
WQv
0.10 25,003.000
716.000
10.55
(N/A)
(N/A)
SCM B
(OUT)
WQV
0.10 21,974.000
1,442.000
0.13
574.45
19,588.000
SCM B (IN)
Post 1 yr
1.00 87,135.000
720.000
41.19
(N/A)
(N/A)
SCM B
(OUT)
Post 1 yr
1.00 40,519.000
783.000
1.86
575.20
54,645.000
SCM B (IN)
Post 10 yr
10.00 192,455.000
720.000
78.08
(N/A)
(N/A)
SCM B
(OUT)
Post 10 yr
10.00 143,166.000
753.000
13.74
576.23
105,339.000
SCM B (IN)
Post 25 yr
25.00 241,961.000
720.000
90.00
(N/A)
(N/A)
SCM B
(OUT)
Post 25 yr
25.00 191,381.000
750.000
23.14
576.44
115,935.000
SCM B (IN)
Post 50 yr
50.00 282,366.000
720.000
98.29
(N/A)
(N/A)
SCM B
(OUT)
Post 50 yr
50.00 230,785.000
732.000
32.29
576.61
124,563.000
SCM B (IN)
Post 100 yr
100.00 324,985.000
720.000
105.67
(N/A)
(N/A)
SCM B
(OUT)
Post 100 yr
100.00 272,271.000
729.000
41.01
576.79
134,155.000
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

DESIGN OF STORMWATER CONTROL
MEASURE"A"
The Glenns
TRU-1 9030

0 McADAMS
STAGE -STORAGE FUNCTION - ABOVE NORMAL POOL
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM A
ABOVE NORMAL POOL
Date: 3/17/2021
Calculated By: M.Duval, PE
Average Incremental Accumulated Calculated
Contour Stage Contour Area Contour Area Contour Vol Contour Vol Stage
Ffti Ffti Fsfl Fsfl Fcfl Fcfl Ffti
572.50
0.00
37,552
573.00
0.50
40,007
38,780
19,390
19,390
0.50
574.00
1.50
43,796
41,902
41,902
61,291
1.51
575.00
2.50
37,948
40,872
40,872
102,163
2.48
576.00
3.50
46,393
42,171
42,171
144,334
3.46
1 577.00
4.50
1 49,047
47,720
1 47,720
1 192,054
1 4.55
250,000 stalage vs. stage
200,000
y = 39845x'.0374
150,000 R2 = 0.9998
1*000
50,000
0
0.00 1.00 2.00 3.00 4.00 5.00
Stage (feet)
b = 1.0374
Ks 39845

9 MCADAMS
STAGE -STORAGE FUNCTION - BELOW NORMAL POOL
Project Name: The Glenns Date 3/17/2021
Project Number: TRU-19030 Calculated By: M.Duval, PE
Facility ID: SCM A
MAIN POOL
Average Incremental Accumulated Calculated
Contour Stage Contour Area Contour Area Contour Vol Contour Vol Stage
rffl rffl r�fi rQfl r,fl r,fl rffl
FOREBAY
567.00
0.00
20,264
568.00
1.00
21,934
21,099
21,099
21,099
1.01
569.00
2.00
23,664
22,799
22,799
43,898
1.98
570.00
3.00
25,453
24,559
24,559
68,457
2.97
571.00
4.00
27,299
26,376
26,376
94,833
4.00
572.00
5.00
29,203
28,251
28,251
123,084
5.07
Storage vs. Stage
140,000
120,000 y = 20850xl 0111
100,000 R 2 0.9996
80,000
60,000
40,000
20,000
0
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Stage (feet)
b = 1.0936
K� = 1 20850
Average Incremental Accumulated Calculated
Contour Stage Contour Area Contour Area Contour Vol Contour Vol Stage
rffl rffl r�fi rQfl r,fl r,fl rffl
567.00
0.00
2,840
568.00
1.00
3,361
3,101
3,101
3,101
1.02
569.00
2.00
3,739
3,550
3,550
6,651
1.95
570.00
3.00
4,508
4,124
4,124
10,774
2.93
571.00
4.00
5,136
4,822
4,822
15,596
4.50
572.00
5.00
5,795
5,466
5,466
21,062
5.15
Storage vs. Stage
25,000
20,000 y = 3016.5x'
R2 0.9983
U 15,000
10,000
5,000
0
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Stage (feet)
b = 1.1859
K� = 1 3016

2 MCADAMS
VOLUME CALCULATIONS
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM A
TOTALVOLUME
Volume of Main Pool = 123,084 ef
Volume of Forebays = 21,062 ef
Total Volume Below NWSE = 144,145 ef
= [ 3.31 acre-ft
Total Volume Above NWSE 192,054 ef
4.41 acre-ft
Total Volume of Facility 336,199 ef
7.72 acre-ft
FOREBAY CALCULATION
Total Volume Below NWSE = ef
Volume of Forebays =1 ef
% Forebay =
AVERAGE DEPTH OF POND
Total Volume Below NWSE = ef
Surface Area at NWSE = sf
Date: 3/17/2021
Calculated By: M.Duval, PE
Fo-rebayyolume should be approximately 20% 1 (code allows 15
Average Depth = JAverage depth mustbe greater th

Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM A
DRAINAGE CHARACTERISTICS
0 MCADAMS
SURFACE AREA CALCULATION
Date: 3/17/2021
Calculated By: M.Duval, PE
Total Drainage Area 24.75 acres
Total Impervious Area 8.85 acres FInclude both onsite and oftsite impervi-ous area
% Impervious
DETERMINATION OF REQUIRED SURFACE AREA
(REF: NCDWQ BMP Handbook, 2007).
Average Depth = ft
TSS Removal =
SAIDA table for PiedmonWountain regio
Average Depth 3.5
Lower Boundary 30.0% 1.21
% Impervious 35.8% 1.42
Upper Boundary 40.0% 1.58
SA/DA required =
Surface Area Required 15,338 ft
0.35 acres
Surface Area Provided = ft

'TiMcADAMS
WATER QUALITY VOLUME CALCULATION
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM A
WATER QUALITY VOLUME
(REF.- Simple Method, Schueler, 1987).
where,
WQV = P x Rv x A / 12
WQV = Water Quality Volume (acre-ft)
Rv = 0.05 + 0.009 x 1, where I is % Impervious Cover
A = Area (acres)
P = Rainfall (inches)
Total Drainage Area, A
24.75
acres
Total Impervious Area
8.85
acres
% Impervious, 1
35.75%
Rainfall, P
1.00
inches
Rv =1 0.372 acres
WQV=J 0.767 acre-ft
= 1 33,397 Gf
1 -YEAR TREATMENT VOLUME
PrelPost Difference in I- Year Volume
1 -Year Treatment Volume 70,431 Gf
1.617 acre-ft
ASSOCIATED DEPTH OF 1" TREATMENT VOLUME IN POND
Water Quality Volume = 1 33,397 Gf
Ks =1 39845
b=1 1.0374
NWSE =1 572.50 ft
Date: 3/17/2021
Calculated By: M.Duval, PE
Depth of WQV in Pond 0.84 ft
10.12 inches
Elevation 573.34 ft Spillway must be set above this e/e

0 MCADAMS
WATER QUALITY VOLUME DRAWDOWN CALCULATION
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM A
DRAWDOWN DESIGN
Using falling head
Orifice Diameter =
3.00
inches
Number of Orifices =
1
Orifice Coefficient, Cd =
0.60
Ks=
39845
b =
1.0374
NWSE =
572.50
ft
WQV=l
33,397
WQV Elevation in Pond =1
573.34
ft
Date: 3/17/2021
Calculated By: M.Duval, PE
Average Incremental Incremental
WSEL Storage Siphon Flow Flow Volume Time
Ift] 1cf] [cfs] [cfs] 1cf] [see]
573.34
33397
0.200
573.27
30315
0.189
0.195
3,083
15,837
573.19
27243
0.178
0.184
3,072
16,732
573.12
24184
0.166
0.172
3,059
17,808
573.04
21139
0.153
0.159
3,045
19,139
572.97
18109
0.138
0.145
3,029
20,846
572.89
15098
0.122
0.130
3,011
23,190
572.82
12109
0.103
0.113
2,590
26,517
572.74
9146
0.080
0.092
2,963
32,350
572.67
6217
0.046
0.063
2,928
46,719
572.59
3340
0.019
0.032
2,878
89,636
Drawdown Time = days
DRAWDOWN DESIGN
Us—m—gaverage head
Average Head on Orifice 0.359 inches
Orifice Coefficient, Cd 0.60 1
Area of Orifice sf
Flowrate, Q = efs
12-5 day drawdo
Drawdown Time = days 12-5 day drawdo

'M WADAMS
CHANNEL PROTECTION VOLUME CALCULATION
Project Name: Glencroft Phase 11 Date 3/17/2021
Project Number: TRU-19030 Calculated By: M. Duval, PE
Facility ID: SCM A Channel Protection Volume
DETERMINATION OF CHANNEL PROTECTION VOLUME
PRE DEVELOPMENT
Sub -basin ID 1 -Year Runoff Volume
- 1cq [acre-feet
F1 72,844 1.
Totals 72,844 1.6
POST DEVELOPMENT
Sub -basin ID 1�Year Runoff Volume
cfl racre-feetl
1-Bypass
2,301
1-To SCM
140,974
NO,
5 4
Totals
143,274
3.29
Channel Protection Volume, CPV - 1 70,431 cf
=1 1.62 acre-ft

TIMCADAMS
RISER ANTI -FLOTATION CALCULATION
Project Name The Glerms
Project Number TRU-19030
Facility ID: SCM A
INPUT DATA
Inside Length =
4.00
ft
Inside Width =
4.00
ft
Wall Thickness =
6.00
in
Standard Base Length =
5.00
ft
Standard Base Width =
5.00
ft
Standard Base Thickness -
in
Inside Height of Riser -Mft
Concrete Unit Weight =
Pcf
Outside Diameter of Barrel =
in
Drain Pipe (if present) =
in
TRASH RACK DISPLACEMENT
Date 3/17/2021
Calculated By: M. Duval
IUnit weight of manhole concrete is 142 pcf p
Bottom Length W
W�dth 7.00 ft Calculation for truncated square pyramid_
Top Length dth 1.00 ft
Height 2.00 ft
Trash Rack Displacement 38MOOO cf
CONCRETE PRESENT IN RISER STRUCTURE
Riser Walls - 22.500 cf
Standard Base of Riser = 12.500 cf
Less Opening for Ba rrel = 1.571 cf
Less Opening for Drain P ipe - 0.175 cf
Less Opening for Orifice =� 4.500 Jcf
Total Concrete Less Openings - 28.755 cf
Weight of Concrete = 4,083 lbs
AMOUNT OF WATER DISPLACED BY RISER STRUCTURE
Displacement by Concrete - 28.755 cf
Displacement by Open Air - 40.000 cf
Displacement by Trash Rack= � 38.000 Jcf
Total Water Displaced - 106.755 cf
Weight of Water Displaced = 6,661 lbs
AMOUNT OF CONCRETE TO ADD TO RISER STRUCTURE
Safety Factor
-
Add'I Weight for Bouyancy
= lbs
Bouyant Weight of Concrete
- 79.60
Pcf
Bouyant Weight w/ SF
= 69.22
Pcf
Add'I Concrete to Add
- 51.686
cf
Less Standard Base
- 12.500
�
cf
�cf
New Base Design Required
= 64.186
ANTI FLOTATION BLOCK DESIGN CALCULATIONS
AF Block ­:idthh
= 8.00 ft
AF Block'
8.00 ft
AF Block Thickness
15.00 in
AF Block Provided
800100 cf
Total Concrete Present = cf
Total Concrete Present = lbs
FR;Tommend 1. 15 or higher

9 MCADAM
Subsection: Elevation -Area Volume Curve
Label: SCM A
Return Event: 0.00 years
Storm Event: WQv
Elevation Planimeter Area Al+A2+sqr Volume Volume (Total)
(ft) (ft2) (ft2) (Al*A2) (ft3) (ft3)
(ft2)
572.50
0.0
37,552.000
0.000
0.000
0.000
573.00
0.0
40,007.000
116,319.068
19,387.000
19,387.000
574.00
0.0
43,796.000
125,661.650
41,887.000
61,274.000
575.00
0.0
46,393.000
135,264.801
45,088.000
106,362.000
576.00
0.0
49,047.000
143,141.546
47,714.000
154,076.000
577.00
0.0
51,758.000
151,189.270
50,396.000
204,472.000
578.00
0.0
54,525.000
159,406.488
53,135.000
257,608.000
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data
Label: SCM A
Return Event: 0.00 years
Storm Event: WQv
Requested Pond Water Surface Elevations
Minimum (Headwater) 572.50 ft
Increment (Headwater) 0.10 ft
Maximum (Headwater) 578.00 ft
Outlet Connectivity
Structure Type Outlet ID Direction Outfall El E2
(ft) (ft)
Orifice -Area
Orifice - 2
Forward
Culvert - 1
573.50
578.00
Inlet Box
Riser - 1
Forward
Culvert - 1
575.00
578.00
Orifice -Circular
Siphon
Forward
Culvert - 1
572.50
578.00
Culvert -Circular
Culvert - 1
Forward
TW
572.50
578.00
Tailwater Settings
Tailwater
(N/A)
(N/A)
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data
Label: SCIVI A
Structure ID: Culvert - 1
Structure Type: Culvert -Circular
Number of Barrels
2
Diameter
24.0 in
Length
50.00 ft
Length (Computed Barrel)
50.00 ft
Slope (Computed)
0.010 ft/ft
Outlet Control Data
Manning's n
0.013
Ke
0.500
Kb
0.012
Kr
0.000
Convergence Tolerance
0.00 ft
Inlet Control Data
Equation Form
Form 1
K
0.0098
M
2.0000
C
0.0398
Y
0.6700
T1 ratio (HW/D)
1.155
T2 ratio (HW/D)
1.302
Slope Correction Factor
-0.500
Use unsubmerged inlet control 0 equation below T1
elevation.
Use submerged inlet control 0 equation above T2
elevation
In transition zone between unsubmerged and submerged
inlet control,
interpolate between flows at T1 & T2...
Return Event: 0.00 years
Storm Event: WQv
T1 Elevation 574.81 ft T1 Flow 15.55 ft3/S
T2 Elevation 575.10 ft T2 Flow 17.77 ft3/S
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data Return Event: 0.00 years
Label: SCIVI A Storm Event: WQv
Structure ID: Riser - 1
Structure Type: Inlet Box
Number of Openings
1
Elevation
575.00 ft
Orifice Area
16.0 ft2
Orifice Coefficient
1.000
Weir Length
16.00 ft
Weir Coefficient
3.00 (ftA0 .5)/s
K Reverse
1.000
Manning's n
0.000
Kev, Charged Riser
0.000
Weir Submergence
False
Orifice H to crest
False
Structure ID: Siphon
Structure Type: Orifice -Circular
Number of Openings
1
Elevation
572.50 ft
Orifice Diameter
3.0 in
Orifice Coefficient
0.600
Structure ID: Orifice - 2
Structure Type: Orifice -Area
Number of Openings
1
Elevation
573.50 ft
Orifice Area
1.0 ft2
Top Elevation
574.00 ft
Datum Elevation
573.75 ft
Orifice Coefficient
1.000
Structure ID: TW
Structure Type: TW Setup, IDS Channel
Tailwater Type
Free Outfall
Convergence Tolerances
Maximum Iterations
30
Tailwater Tolerance
0.01 ft
(Minimum)
Tailwater Tolerance
0.50 ft
(Maximum)
Headwater Tolerance
0.01 ft
(Minimum)
Headwater Tolerance
0.50 ft
(Maximum)
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data
Label: SCM A
Convergence Tolerances
Flow Tolerance (Minimum) 0.001 ft3/S
Flow Tolerance (Maximum) 10.000 ft3/S
TRU1903O.ppc
TRU1903O.ppc
Return Event: 0.00 years
Storm Event: WQv
3/17/2021

9 MCADAM
Subsection: Composite Rating Curve
Label: SCM A
Composite Outflow Summary
Return Event: 0.00 years
Storm Event: WQv
Water Surface Flow Tailwater Elevation Convergence Error
Elevation (ft3/S) (ft) (ft)
(ft)
572.50
0.00
(N/A)
0.00
572.60
0.02
(N/A)
0.00
572.70
0.05
(N/A)
0.00
572.80
0.10
(N/A)
0.00
572.90
0.12
(N/A)
0.00
573.00
0.14
(N/A)
0.00
573.10
0.16
(N/A)
0.00
573.20
0.18
(N/A)
0.00
573.30
0.19
(N/A)
0.00
573.40
0.20
(N/A)
0.00
573.50
0.21
(N/A)
0.00
573.60
1.00
(N/A)
0.00
573.70
1.80
(N/A)
0.00
573.80
2.60
(N/A)
0.00
573.90
3.41
(N/A)
0.00
574.00
4.21
(N/A)
0.00
574.10
4.95
(N/A)
0.00
574.20
5.59
(N/A)
0.00
574.30
6.17
(N/A)
0.00
574.40
6.69
(N/A)
0.00
574.50
7.18
(N/A)
0.00
574.60
7.63
(N/A)
0.00
574.70
8.07
(N/A)
0.00
574.80
8.48
(N/A)
0.00
574.90
8.86
(N/A)
0.00
575.00
9.23
(N/A)
0.00
575.10
10.95
(N/A)
0.00
575.20
13.51
(N/A)
0.00
575.30
16.75
(N/A)
0.00
575.40
20.58
(N/A)
0.00
575.50
24.85
(N/A)
0.00
575.60
29.58
(N/A)
0.00
575.70
34.54
(N/A)
0.00
575.80
39.55
(N/A)
0.00
575.90
43.92
(N/A)
0.00
576.00
46.40
(N/A)
0.00
576.10
47.45
(N/A)
0.00
576.20
48.49
(N/A)
0.00
576.30
49.50
(N/A)
0.00
576.40
50.50
(N/A)
0.00
576.50
51.46
(N/A)
0.00
576.60
52.42
(N/A)
0.00
576.70
53.36
(N/A)
0.00
576.80
54.28
(N/A)
0.00
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Composite Rating Curve
Label: SCM A
Composite Outflow Summary
Return Event: 0.00 years
Storm Event: WQv
Water Surface
Flow
Tailwater Elevation
Convergence Error
Elevation
(ft3/S)
(ft)
(ft)
(ft)
576.90
55.18
(N/A)
0.00
577.00
56.08
(N/A)
0.00
577.10
56.96
(N/A)
0.00
577.20
57.82
(N/A)
0.00
577.30
58.67
(N/A)
0.00
577.40
59.51
(N/A)
0.00
577.50
60.33
(N/A)
0.00
577.60
61.15
(N/A)
0.00
577.70
61.96
(N/A)
0.00
577.80
62.75
(N/A)
0.00
577.90
63.54
(N/A)
0.00
1 578.00
1 64.31
1 (N/A)
0.00
Contributing Structures
(no Q: Orifice -
2,Riser -
1,Siphon,Culvert
- 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Siphon,Culvert -
1 (no Q: Orifice -
2,Riser - 1)
Orifice - 2,Siphon,Culvert
- 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert
- 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert
- 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert
- 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert
- 1 (no Q:
Riser - 1)
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Composite Rating Curve Return Event: 0.00 years
Label: SCM A Storm Event: WQv
Composite Outflow Summary
Contributing Structures
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Siphon,Culvert - 1 (no Q:
Riser - 1)
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Orifice - 2,Riser - 1,Siphon,Culvert - 1
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert - 1 (no Q: Orifice -
2,Siphon)
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Composite Rating Curve
Label: SCM A
Composite Outflow Summary
Contributing
Structures
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
2,Siphon)
Riser - 1,Culvert -
1 (no Q: Orifice -
TRU1903O.ppc
TRU1903O.ppc
Return Event: 0.00 years
Storm Event: WQv
3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM A (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
572.50 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
1.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 0.00 years
Storm Event: WQv
Flow (Peak In) 15.50 ft3/S Time to Peak (Flow, In) 716.000 min
Flow (Peak Outlet) 0. 18 ft3/S Time to Peak (Flow, Outlet) 1,442.000 min
Elevation (Water Surface,
573.27 ft
Peak)
Volume (Peak)
30,331.943 ft3
Mass Balance (ft)
Volume (Initial)
0.000 ft3
Volume (Total Inflow)
37,784.000 ft3
Volume (Total Infiltration)
0.000 ft3
Volume (Total Outlet
34,615.000 ft3
Outflow)
Volume (Retained)
3,164.000 ft3
Volume (Unrouted)
-4.000 ft3
Error (Mass Balance)
0.0 %
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM A (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
572.50 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 1.00 years
Storm Event: 1 yr
Flow (Peak In) 67.18 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 6.45 ft3/S Time to Peak (Flow, Outlet) 756.000 min
Elevation (Water Surface,
574.35
ft
Peak)
Volume (Peak)
76,933.008
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
143,260.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
100,100.000
ft3
Outflow)
Volume (Retained)
43,009.000
ft3
Volume (Unrouted)
-151.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM A (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
572.50 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 10.00 years
Storm Event: 10-yr
Flow (Peak In) 133.71 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 37.60 ft3/S Time to Peak (Flow, Outlet) 732.000 min
Elevation (Water Surface,
575.76
ft
Peak)
Volume (Peak)
142,430.272
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
328,041.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
280,500.000
ft3
Outflow)
Volume (Retained)
47,244.000
ft3
Volume (Unrouted)
-297.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM A (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
572.50 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 25.00 years
Storm Event: 25-yr
Flow (Peak In) 155.74 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 49.29 ft3/S Time to Peak (Flow, Outlet) 732.000 min
Elevation (Water Surface,
576.28
ft
Peak)
Volume (Peak)
167,887.992
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
415,821.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
366,138.000
ft3
Outflow)
Volume (Retained)
49,315.000
ft3
Volume (Unrouted)
-368.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM A (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
572.50 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 50.00 years
Storm Event: 50-yr
Flow (Peak In) 171.14 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 53.32 ft3/S Time to Peak (Flow, Outlet) 732.000 min
Elevation (Water Surface,
576.70
ft
Peak)
Volume (Peak)
188,882.082
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
487,692.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
436,332.000
ft3
Outflow)
Volume (Retained)
50,935.000
ft3
Volume (Unrouted)
-424.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM A (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
572.50 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 100.00 years
Storm Event: 100-yr
Flow (Peak In) 184.91 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 56.76 ft3/S Time to Peak (Flow, Outlet) 735.000 min
Elevation (Water Surface,
577.08
ft
Peak)
Volume (Peak)
208,520.961
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
563,656.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
510,386.000
ft3
Outflow)
Volume (Retained)
52,786.000
ft3
Volume (Unrouted)
-484.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

DESIGN OF STORMWATER CONTROL
MEASURE"B"
The Glenns
TRU-1 9030

0 McADAMS
STAGE -STORAGE FUNCTION - ABOVE NORMAL POOL
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM B
ABOVE NORMAL POOL
Date: 3/17/2021
Calculated By: M.Duval, PE
Average Incremental Accumulated Calculated
Contour Stage Contour Area Contour Area Contour Vol Contour Vol Stage
Ffti Ffti Fsfl Fsfl Fcfl Fcfl Ffti
574.00
0.00
42,468
574.50
0.50
45,473
43,971
21,985
21,985
0.50
575.00
1.00
46,997
46,235
23,118
45,103
0.99
576.00
2.00
50,086
48,542
48,542
93,644
1.98
577.00
3.00
53,232
51,659
51,659
145,303
2.99
1 578.00
4.00
1 56,435
54,834
1 54,834
1 200,137
1 4.05
250,000 stalage vs. stage
200,000 y = 45435x' I'll
R2 0.9999
150,000
1 *000
50 , 000
'o
0
0.00 1.00 2.00 3.00 4.00 5.00
Stage (feet)
b = 1.0605
Ks 45435

9 MCADAMS
STAGE -STORAGE FUNCTION - BELOW NORMAL POOL
Project Name: The Glenns Date 3/17/2021
Project Number: TRU-19030 Calculated By: M.Duval, PE
Facility ID: SCM B
MAIN POOL
Average Incremental Accumulated Calculated
Contour Stage Contour Area Contour Area Contour Vol Contour Vol Stage
rffl rffl r�fi rQfl r,fl r,fl rffl
FOREBAY
569.00
0.00
19,146
570.00
1.00
21,300
20,223
20,223
20,223
1.01
571.00
2.00
23,522
22,411
22,411
42,634
1.97
572.00
3.00
25,804
24,663
24,663
67,297
2.96
573.00
4.00
28,148
26,976
26,976
94,273
3.99
574.00
5.00
31,775
29,962
29,962
124,235
5.10
Storage vs. Stage
140,000
120,000 y = 1 9906x' 1242
100,000 R 2 0.9993
80,000
60,000
40,000
20,000
0
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Stage (feet)
b = 1.1242
K� = 1 19906
Average Incremental Accumulated Calculated
Contour Stage Contour Area Contour Area Contour Vol Contour Vol Stage
rffl rffl r�fi rQfl r,fl r,fl rffl
569.00
0.00
4,186
570.00
1.00
4,955
4,571
4,571
4,571
1.02
571.00
2.00
5,780
5,368
5,368
9,938
1.95
572.00
3.00
6,661
6,221
6,221
16,159
2.93
573.00
4.00
7,594
7,128
7,128
23,286
3.0
574.00
5.00
9,878
8,736
8,736
32,022
5.17
Storage vs. Stage
35,000
30,000 y = 4448.5xl 201
25,000 R2 0.9982
20,000
15,000
10,000
5,000
0
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Stage (feet)
b = 1.2010
K� = 1 4448

2 MCADAMS
VOLUME CALCULATIONS
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM B
TOTALVOLUME
Volume of Main Pool = 124,235 ef
Volume of Forebays = 32,022 ef
Total Volume Below NWSE = 156,257 ef
= [ 3.59 acre-ft
Total Volume Above NWSE 200,137 ef
4.59 acre-ft
Total Volume of Facility 356,393 ef
8.18 acre-ft
FOREBAY CALCULATION
Total Volume Below NWSE = ef
Volume of Forebays =1 ef
% Forebay =
AVERAGE DEPTH OF POND
Total Volume Below NWSE = ef
Surface Area at NWSE = sf
Date: 3/17/2021
Calculated By: M.Duval, PE
Fo-rebayyolume should be approximately 20% 1 (code allows 15
Average Depth = JAverage depth mustbe greater th

Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM B
DRAINAGE CHARACTERISTICS
0 MCADAMS
SURFACE AREA CALCULATION
Date: 3/17/2021
Calculated By: M.Duval, PE
Total Drainage Area 13.75 acres
Total Impervious Area 6.42 acres FInclude both onsite and oftsite impervi-ous area
% Impervious
DETERMINATION OF REQUIRED SURFACE AREA
(REF: NCDWQ BMP Handbook, 2007).
Average Depth = ft
TSS Removal =
SAIDA table for PiedmonWountain regio
Average Depth 3.5
Lower Boundary 40.0% 1.21
% Impervious 46.7% 1.46
Upper Boundary 50.0% 1.58
SA/DA required =
Surface Area Required ft
acres
Surface Area Provided = ft

'TiMcADAMS
WATER QUALITY VOLUME CALCULATION
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM B
WATER QUALITY VOLUME
(REF.- Simple Method, Schueler, 1987).
where,
WQV = P x Rv x A/ 12
WQV = Water Quality Volume (acre-ft)
Rv = 0.05 + 0.009 x 1, where I is % Impervious Cover
A = Area (acres)
P = Rainfall (inches)
Total Drainage Area ' A
1 3.75
acres
Total Impervious Area
6.42
acres
% Impervious, 1
46.70%
Rainfall, P
1.00
inches
Rv =1 0.470 acres
WQV=J 0.539 acre-ft
= 1 23,472 Gf
1 -YEAR TREATMENT VOLUME
PrelPost Difference in I- Year Volume
1 -Year Treatment Volume = 1 44,883 Gf
= L 1.030 acre-ft
ASSOCIATED DEPTH OF 1 -YEAR TREATMENT VOLUME IN POND
Water Quality Volume = 1 23,472 Gf
Ks =1 45435
b=1 1.0605
NWSE =1 574.00 ft
Date: 3/17/2021
Calculated By: M.Duval, PE
Depth of WQV in Pond 0.54 ft
6.44 inches
Elevation 574.54 ft Spillway must be set above this e/e

0 MCADAMS
WATER QUALITY VOLUME DRAWDOWN CALCULATION
Project Name: The Glenns
Project Number: TRU-19030
Facility ID: SCM B
DRAWDOWN DESIGN
Using falling head
Orifice Diameter =
3.00
inches
Number of Orifices =
1
Orifice Coefficient, Cd =
0.60
Ks=
45435
b =
1.0605
NWSE =
574.00
ft
WQV=l
23,472
WQV Elevation in Pond =1
574.54
ft
Date: 3/17/2021
Calculated By: M.Duval, PE
Average Incremental Incremental
WSEL Storage Siphon Flow Flow Volume Time
Ift] 1cf] [cfs] [cfs] 1cf] [see]
574.54
23472
0.151
574.49
21272
0.142
0.147
2,199
14,975
574.44
19086
0.133
0.138
2,186
15,895
574.39
16914
0.122
0.128
2,172
17,030
574.35
14758
0.111
0.117
2,156
18,478
574.30
12619
0.098
0.105
2,138
20,424
574.25
10501
0.084
0.091
2,118
23,242
574.20
8408
0.062
0.073
2,094
28,788
574.16
6344
0.041
0.051
2,064
40,102
574.11
4318
0.024
0.033
2,026
61,999
574.06
2347
0.010
0.017
1,971
115,504
Drawdown Time = days
DRAWDOWN DESIGN
Us—m—gaverage head
Average Head on Orifice 0.206 inches
Orifice Coefficient, Cd 0.60 1
Area of Orifice sf
Flowrate, Q = efs
12-5 day drawdo
Drawdown Time = days 12-5 day drawdo

'M WADAMS
CHANNEL PROTECTION VOLUME CALCULATION
Project Name: Glencroft Phase 11 Date 3/17/2021
Project Number: TRU-19030 Calculated By: M. Duval, PE
Facility ID: SCM A Channel Protection Volume
DETERMINATION OF CHANNEL PROTECTION VOLUME
PRE DEVELOPMENT
Sub -basin ID 1 -Year Runoff Volume
1cq [acre-feet
FT05 50,544 1 1�
tals 50,544 1.1
POST DEVELOPMENT
Sub -basin ID 1�Year Runoff Volume
cfl racre-feetl
5-Bypass
9,066
9 2918
5-To SCM
86,361
1!
Totals
95,427
2.19
Channel Protection Volume, CPV - 1 44,883 cf
=1 1.03 acre-ft

TIMCADAMS
RISER ANTI -FLOTATION CALCULATION
Project Name The Glerms
Project Number TRU-19030
Facility ID: SCM A
INPUT DATA
Inside Length =
4.00
ft
Inside Width =
4.00
ft
Wall Thickness =
6.00
in
Standard Base Length =
5.00
ft
Standard Base Width =
5.00
ft
Standard Base Thickness -
in
Inside Height of Riser -Mft
Concrete Unit Weight =
Pcf
Outside Diameter of Barrel =
in
Drain Pipe (if present) =
in
TRASH RACK DISPLACEMENT
Date 3/17/2021
Calculated By: M. Duval
IUnit weight of manhole concrete is 142 pcf p
Bottom Length W
W�dth 7.00 ft Calculation for truncated square pyramid_
Top Length dth 1.00 ft
Height 2.00 ft
Trash Rack Displacement 38MOOO cf
CONCRETE PRESENT IN RISER STRUCTURE
Riser Walls - 40.500 cf
Standard Base of Riser = 12.500 cf
Less Opening for Ba rrel = 1.571 cf
Less Opening for Drain P ipe - 0.175 cf
Less Opening for Orifice =� 4.500 Jcf
Total Concrete Less Openings - cf
Weight of Concrete = 1 6,639 lbs
AMOUNT OF WATER DISPLACED BY RISER STRUCTURE
Displacement by Concrete - 46.755 cf
Displacement by Open Air - 72.000 cf
Displacement by Trash Rack= � 38.000 Jcf
Total Water Displaced - 156.755 cf
Weight of Water Displaced = 9,781 lbs
AMOUNT OF CONCRETE TO ADD TO RISER STRUCTURE
Safety Factor
-
Add'I Weight for Bouyancy
= lbs
Bouyant Weight of Concrete
- 79.60
Pcf
Bouyant Weight w/ SF
= 69.22
Pcf
Add'I Concrete to Add
- 66.595
cf
Less Standard Base
- 12.500
�
cf
�cf
New Base Design Required
= 79.095
ANTI FLOTATION BLOCK DESIGN CALCULATIONS
AF Block ­:idthh
= 8.00 ft
AF Block'
8.00 ft
AF Block Thickness
15.00 in
AF Block Provided
800100 cf
Total Concrete Present = cf
Total Concrete Present = lbs
FR;Tommend 1. 15 or higher

9 MCADAM
Subsection: Elevation -Area Volume Curve
Label: SCM B
Return Event: 0.00 years
Storm Event: WQv
Elevation Planimeter Area Al+A2+sqr Volume Volume (Total)
(ft) (ft2) (ft2) (Al*A2) (ft3) (ft3)
(ft2)
574.00
0.0
42,468.000
0.000
0.000
0.000
574.50
0.0
45,473.000
131,885.822
21,981.000
21,981.000
575.00
0.0
46,997.000
138,698.720
23,116.000
45,097.000
576.00
0.0
50,086.000
145,599.922
48,533.000
93,631.000
577.00
0.0
53,232.000
154,953.046
51,651.000
145,282.000
578.00
0.0
56,435.000
164,477.108
54,826.000
200,107.000
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data
Label: SCM B
Return Event: 0.00 years
Storm Event: WQv
Requested Pond Water Surface Elevations
Minimum (Headwater) 574.50 ft
Increment (Headwater) 0.10 ft
Maximum (Headwater) 578.00 ft
Outlet Connectivity
Structure Type Outlet ID Direction Outfall El E2
(ft) (ft)
Inlet Box
Riser - 1
Forward
Culvert - 1
576.00
578.00
Orifice -Circular
Orifice - 1
Forward
Culvert - 1
574.00
578.00
Culvert -Circular
Culvert - 1
Forward
TW
571.50
578.00
Orifice -Area
Orifice - 2
Forward
TW
575.00
578.00
Tailwater Settings
Tailwater
(N/A)
(N/A)
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data
Label: SCIVI B
Structure ID: Culvert - 1
Structure Type: Culvert -Circular
Number of Barrels
1
Diameter
24.0 in
Length
55.00 ft
Length (Computed Barrel)
55.00 ft
Slope (Computed)
0.011 ft/ft
Outlet Control Data
Manning's n
0.013
Ke
0.500
Kb
0.012
Kr
0.000
Convergence Tolerance
0.00 ft
Inlet Control Data
Equation Form
Form 1
K
0.0098
M
2.0000
C
0.0398
Y
0.6700
T1 ratio (HW/D)
1.155
T2 ratio (HW/D)
1.301
Slope Correction Factor
-0.500
Use unsubmerged inlet control 0 equation below T1
elevation.
Use submerged inlet control 0 equation above T2
elevation
In transition zone between unsubmerged and submerged
inlet control,
interpolate between flows at T1 & T2...
Return Event: 0.00 years
Storm Event: WQv
T1 Elevation 573.81 ft T1 Flow 15.55 ft3/S
T2 Elevation 574.10 ft T2 Flow 17.77 ft3/S
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data Return Event: 0.00 years
Label: SCIVI B Storm Event: WQv
Structure ID: Riser - 1
Structure Type: Inlet Box
Number of Openings
1
Elevation
576.00 ft
Orifice Area
16.0 ft2
Orifice Coefficient
1.000
Weir Length
16.00 ft
Weir Coefficient
3.00 (ftA0 .5)/s
K Reverse
1.000
Manning's n
0.000
Kev, Charged Riser
0.000
Weir Submergence
False
Orifice H to crest
False
Structure ID: Orifice - 1
Structure Type: Orifice -Circular
Number of Openings
1
Elevation
574.00 ft
Orifice Diameter
3.0 in
Orifice Coefficient
0.600
Structure ID: Orifice - 2
Structure Type: Orifice -Area
Number of Openings
1
Elevation
575.00 ft
Orifice Area
1.0 ft2
Top Elevation
575.50 ft
Datum Elevation
575.25 ft
Orifice Coefficient
1.000
Structure ID: TW
Structure Type: TW Setup, IDS Channel
Tailwater Type
Free Outfall
Convergence Tolerances
Maximum Iterations
30
Tailwater Tolerance
0.01 ft
(Minimum)
Tailwater Tolerance
0.50 ft
(Maximum)
Headwater Tolerance
0.01 ft
(Minimum)
Headwater Tolerance
0.50 ft
(Maximum)
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Outlet Input Data
Label: SCM B
Convergence Tolerances
Flow Tolerance (Minimum) 0.001 ft3/S
Flow Tolerance (Maximum) 10.000 ft3/S
TRU1903O.ppc
TRU1903O.ppc
Return Event: 0.00 years
Storm Event: WQv
3/17/2021

9 MCADAM
Subsection: Composite Rating Curve
Label: SCM B
Composite Outflow Summary
Return Event: 0.00 years
Storm Event: WQv
Water Surface Flow Tailwater Elevation Convergence Error
Elevation (ft3/S) (ft) (ft)
(ft)
574.00
0.00
(N/A)
0.00
574.10
0.02
(N/A)
0.00
574.20
0.05
(N/A)
0.00
574.30
0.10
(N/A)
0.00
574.40
0.12
(N/A)
0.00
574.50
0.14
(N/A)
0.00
574.60
0.16
(N/A)
0.00
574.70
0.18
(N/A)
0.00
574.80
0.19
(N/A)
0.00
574.90
0.21
(N/A)
0.00
575.00
0.22
(N/A)
0.00
575.10
1.04
(N/A)
0.00
575.20
1.85
(N/A)
0.00
575.30
2.66
(N/A)
0.00
575.40
3.48
(N/A)
0.00
575.50
4.29
(N/A)
0.00
575.60
5.03
(N/A)
0.00
575.70
5.68
(N/A)
0.00
575.80
6.26
(N/A)
0.00
575.90
6.78
(N/A)
0.00
576.00
7.27
(N/A)
0.00
576.10
9.25
(N/A)
0.00
576.20
12.45
(N/A)
0.00
576.30
16.45
(N/A)
0.00
576.40
21.09
(N/A)
0.00
576.50
26.30
(N/A)
0.00
576.60
31.92
(N/A)
0.00
576.70
37.95
(N/A)
0.00
576.80
41.37
(N/A)
0.00
576.90
42.07
(N/A)
0.00
577.00
42.77
(N/A)
0.00
577.10
43.45
(N/A)
0.00
577.20
44.13
(N/A)
0.00
577.30
44.78
(N/A)
0.00
577.40
45.43
(N/A)
0.00
577.50
46.07
(N/A)
0.00
577.60
46.69
(N/A)
0.00
577.70
47.31
(N/A)
0.00
577.80
47.92
(N/A)
0.00
577.90
48.52
(N/A)
0.00
1 578.00
1 49.11
1 (N/A)
0.00
Contributing Structures
(no Q: Riser - 1,Orifice - 1,Culvert
1,Orifice - 2)
TRU1903O.ppc
TRU1903O.ppc
3/17/2021

9 MCADAM
Subsection: Composite Rating Curve Return Event: 0.00 years
Label: SCM B Storm Event: WQv
Composite Outflow Summary
Contributing Structures
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1 (no Q: Riser -
1,Orifice
- 2)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Orifice -
1,Culvert
- 1,Orifice - 2 (no
Q: Riser
- 1)
Riser - 1,Orifice
-
1,Culvert - 1,Orifice -
2
Riser - 1,Orifice
-
1,Culvert - 1,Orifice -
2
Riser - 1,Orifice
-
1,Culvert - 1,Orifice -
2
Riser - 1,Orifice
-
1,Culvert - 1,Orifice -
2
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Composite Rating Curve Return Event: 0.00 years
Label: SCM B Storm Event: WQv
Composite Outflow Summary
Contributing
Structures
Riser -
1,Orifice -
1,Culvert -
1,Orifice -
2
Riser -
1,Orifice -
1,Culvert -
1,Orifice -
2
Riser -
1,Orifice -
1,Culvert -
1,Orifice -
2
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
Riser -
1,Culvert
- 1,Orifice -
2 (no Q:
Orifice
- 1)
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM B (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
574.00 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
1.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 0.00 years
Storm Event: WQv
Flow (Peak In) 10.55 ft3/S Time to Peak (Flow, In) 716.000 min
Flow (Peak Outlet) 0. 13 ft3/S Time to Peak (Flow, Outlet) 1,442.000 min
Elevation (Water Surface,
574.45 ft
Peak)
Volume (Peak)
19,587.747 ft3
Mass Balance (ft)
Volume (Initial)
0.000 ft3
Volume (Total Inflow)
25,003.000 ft3
Volume (Total Infiltration)
0.000 ft3
Volume (Total Outlet
21,974.000 ft3
Outflow)
Volume (Retained)
3,022.000 ft3
Volume (Unrouted)
-7.000 ft3
Error (Mass Balance)
0.0 %
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM B (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
574.00 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 1.00 years
Storm Event: 1 yr
Flow (Peak In) 41.19 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 1.86 ft3/S Time to Peak (Flow, Outlet) 783.000 min
Elevation (Water Surface,
575.20 ft
Peak)
Volume (Peak)
54,645.365 ft3
Mass Balance (ft)
Volume (Initial)
0.000 ft3
Volume (Total Inflow)
87,135.000 ft3
Volume (Total Infiltration)
0.000 ft3
Volume (Total Outlet
40,519.000 ft3
Outflow)
Volume (Retained)
46,527.000 ft3
Volume (Unrouted)
-89.000 ft3
Error (Mass Balance)
0.1 %
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM B (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
574.00 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 10.00 years
Storm Event: 10-yr
Flow (Peak In) 78.08 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 13.74 ft3/S Time to Peak (Flow, Outlet) 753.000 min
Elevation (Water Surface,
576.23
ft
Peak)
Volume (Peak)
105,338.654
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
192,455.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
143,166.000
ft3
Outflow)
Volume (Retained)
49,120.000
ft3
Volume (Unrouted)
-170.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM B (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
574.00 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 25.00 years
Storm Event: 25-yr
Flow (Peak In) 90.00 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 23.14 ft3/S Time to Peak (Flow, Outlet) 750.000 min
Elevation (Water Surface,
576.44
ft
Peak)
Volume (Peak)
115,935.424
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
241,961.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
191,381.000
ft3
Outflow)
Volume (Retained)
50,371.000
ft3
Volume (Unrouted)
-209.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM B (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
574.00 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 50.00 years
Storm Event: 50-yr
Flow (Peak In) 98.29 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 32.29 ft3/S Time to Peak (Flow, Outlet) 732.000 min
Elevation (Water Surface,
576.61
ft
Peak)
Volume (Peak)
124,563.028
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
282,366.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
230,785.000
ft3
Outflow)
Volume (Retained)
51,341.000
ft3
Volume (Unrouted)
-241.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021

9 MCADAM
Subsection: Level Pool Pond Routing Summary
Label: SCM B (IN)
Infiltration
Infiltration Method No Infiltration
(Computed)
Initial Conditions
Elevation (Water Surface,
574.00 ft
Initial)
Volume (Initial)
0.000 ft3
Flow (Initial Outlet)
0.00 ft3/S
Flow (Initial Infiltration)
0.00 ft3/S
Flow (Initial, Total)
0.00 ft3/S
Time Increment
3.000 min
Inflow/Outflow Hydrograph Summary
Return Event: 100.00 years
Storm Event: 100-yr
Flow (Peak In) 105.67 ft3/S Time to Peak (Flow, In) 720.000 min
Flow (Peak Outlet) 41.01 ft3/S Time to Peak (Flow, Outlet) 729.000 min
Elevation (Water Surface,
576.79
ft
Peak)
Volume (Peak)
134,154.996
ft3
Mass Balance (ft)
Volume (Initial)
0.000
ft3
Volume (Total Inflow)
324,985.000
ft3
Volume (Total Infiltration)
0.000
ft3
Volume (Total Outlet
272,271.000
ft3
Outflow)
Volume (Retained)
52,439.000
ft3
Volume (Unrouted)
-276.000
ft3
Error (Mass Balance)
0.1
%
TRU1903O.ppc
TRU1903O.ppc 3/17/2021