SW3220302_As-Built - Calculations_20240403

SCM Asbuilt Calculations For:
DENVER DEFENSE
1417 NC-16 BUSINESS, DENVER, NC 28037
Prepared by:
) (/ W&A
ENGINEERING
CIVIL ENGINEERING LANDSCAPE ARCHITECTURE
LAND SURVEYING TRAFFIC ENGINEERING
ECONOMIC DEVELOPMENT
Building Better Communities.Ono Project at a Tinto.
121 Gilead Rd \�,� t i i Imo,
��
Huntersville, NC 28078 ���`\_ . CAR <• /ir
704 875 1615 O.. c) `P qP
NC Engineering License P-2743 — • y •. _
NC Board of Landscape Architects C-614 * U c
[e-mail] /�i�Y.A \\`\��
�iiii i t itti--11��i�\\�_\�\
2/1/2024

Table o f C o me nts
Narrative 3
SCMAsbuiltCalculations 4
• Hydro CAD Report 4
• WaterQualityCalcs 66

Narrative
Storm Wa ter Detention, Wa ter Qua lity Asb uilt
Detention of the storm drainage is not required in this area buta 10-yearstorm
must be conveyed non erosively. Detention hasbeen provided for the 10-year
storm to addressdrainage conc erns sine e the existing outfallison a neighboring
property. The BMPwasdesigned so that run off leaving the site through existing
outfallwould be less than run-offoccurring in the sites current state . Detention
willconsist ofa dry detention basin in the southwest portion ofthe site that ties
into the existing stormwa ter system. Water qua lity willbe provided via a surface
sand filter for the 1st linch ofpost development runoff. All re quirements are met
with the asbuilt SCM.

1S
PRE
3P
2S
BMP A
POST - A (ROUTED)
I
<4S>
> 5L
POST- B (BYPASSED) OUTFACE
Subcat Reach 'ono Link Routing Diagram for 221011 -DENVER DEFENSE(ASBUILT)
Prepared by W&A Engineering, Printed 2/1/2024
HydroCAD®10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC

221011 - DENVER DEFENSE (ASBUILT)
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 2
Rainfall Events Listing (selected events)
Event# Event Storm Type Curve Mode Duration B/B Depth AMC
Name (hours) (inches)
1 1-Year Type II 24-hr Default 24.00 1 2.81 2
2 10-Year Type II 6-hr Default 6.00 1 3.50 2
3 50-Year Type II 6-hr Default 6.00 1 4.68 2

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 3
Time span=0.00-120.00 hrs, dt=0.05 hrs, 2401 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment 1 S: PRE Runoff Area=1.630 ac 57.30% Impervious Runoff Depth=1.17"
Tc=5.0 min CN=81 Runoff=3.43 cfs 0.159 af
Subcatchment2S: POST- A(ROUTED) Runoff Area=119,449 sf 61.05% Impervious Runoff Depth=1.23"
Tc=5.0 min CN=82 Runoff=6.09 cfs 0.281 af
Subcatchment4S: POST-B (BYPASSED) Runoff Area=0.568 ac 89.44% Impervious Runoff Depth=2.17"
Tc=5.0 min CN=94 Runoff=2.07 cfs 0.103 af
Pond 3P: BMP A Peak Elev=844.22' Storage=6,529 cf Inflow=6.09 cfs 0.281 af
Primary=0.36 cfs 0.281 af Secondary=0.00 cfs 0.000 af Outflow=0.36 cfs 0.281 af
Link 5L: OUTFALL Inflow=2.11 cfs 0.384 af
Primary=2.11 cfs 0.384 af
Total Runoff Area = 4.940 ac Runoff Volume = 0.543 af Average Runoff Depth = 1.32"
36.92% Pervious = 1.824 ac 63.08% Impervious = 3.116 ac

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: PRE
Runoff = 3.43 cfs @ 11.96 hrs, Volume= 0.159 af, Depth= 1.17"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-Year Rainfall=2.81"
Area (ac) CN Description
0.934 98 Paved parking, HSG B
0.696 58 Woods/grass comb., Good, HSG B
1.630 81 Weighted Average
0.696 42.70% Pervious Area
0.934 57.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 1 S: PRE
Hydrograph
❑Runoff
- 3.43 cfs
ITpe 1124-h r
3Y f' 111Y a —Rainfal1=2.81"
IRUnbff Area=1 .630 ad
Rin9ff VQlume=0.159 of
2 !RuncT•ff Dep h7iT.11T"
/ Tc=5.0 m i n
CN=81
1 /
0 / / llll//////////////////////////////////////////////////////////////////////4/
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 5
Hydrograph for Subcatchment 1S: PRE
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 2.81 1.17 0.00
1.00 0.03 0.00 0.00 54.00 2.81 1.17 0.00
2.00 0.06 0.00 0.00 55.00 2.81 1.17 0.00
3.00 0.10 0.00 0.00 56.00 2.81 1.17 0.00
4.00 0.13 0.00 0.00 57.00 2.81 1.17 0.00
5.00 0.18 0.00 0.00 58.00 2.81 1.17 0.00
6.00 0.22 0.00 0.00 59.00 2.81 1.17 0.00
7.00 0.28 0.00 0.00 60.00 2.81 1.17 0.00
8.00 0.34 0.00 0.00 61.00 2.81 1.17 0.00
9.00 0.41 0.00 0.00 62.00 2.81 1.17 0.00
10.00 0.51 0.00 0.00 63.00 2.81 1.17 0.00
11.00 0.66 0.01 0.04 64.00 2.81 1.17 0.00
12.00 1.86 0.52 3.06 65.00 2.81 1.17 0.00
13.00 2.17 0.71 0.20 66.00 2.81 1.17 0.00
14.00 2.30 0.81 0.12 67.00 2.81 1.17 0.00
15.00 2.40 0.87 0.10 68.00 2.81 1.17 0.00
16.00 2.47 0.92 0.08 69.00 2.81 1.17 0.00
17.00 2.53 0.97 0.07 70.00 2.81 1.17 0.00
18.00 2.59 1.01 0.06 71.00 2.81 1.17 0.00
19.00 2.64 1.04 0.05 72.00 2.81 1.17 0.00
20.00 2.68 1.07 0.04 73.00 2.81 1.17 0.00
21.00 2.71 1.10 0.04 74.00 2.81 1.17 0.00
22.00 2.75 1.12 0.04 75.00 2.81 1.17 0.00
23.00 2.78 1.15 0.04 76.00 2.81 1.17 0.00
24.00 2.81 1.17 0.04 77.00 2.81 1.17 0.00
25.00 2.81 1.17 0.00 78.00 2.81 1.17 0.00
26.00 2.81 1.17 0.00 79.00 2.81 1.17 0.00
27.00 2.81 1.17 0.00 80.00 2.81 1.17 0.00
28.00 2.81 1.17 0.00 81.00 2.81 1.17 0.00
29.00 2.81 1.17 0.00 82.00 2.81 1.17 0.00
30.00 2.81 1.17 0.00 83.00 2.81 1.17 0.00
31.00 2.81 1.17 0.00 84.00 2.81 1.17 0.00
32.00 2.81 1.17 0.00 85.00 2.81 1.17 0.00
33.00 2.81 1.17 0.00 86.00 2.81 1.17 0.00
34.00 2.81 1.17 0.00 87.00 2.81 1.17 0.00
35.00 2.81 1.17 0.00 88.00 2.81 1.17 0.00
36.00 2.81 1.17 0.00 89.00 2.81 1.17 0.00
37.00 2.81 1.17 0.00 90.00 2.81 1.17 0.00
38.00 2.81 1.17 0.00 91.00 2.81 1.17 0.00
39.00 2.81 1.17 0.00 92.00 2.81 1.17 0.00
40.00 2.81 1.17 0.00 93.00 2.81 1.17 0.00
41.00 2.81 1.17 0.00 94.00 2.81 1.17 0.00
42.00 2.81 1.17 0.00 95.00 2.81 1.17 0.00
43.00 2.81 1.17 0.00 96.00 2.81 1.17 0.00
44.00 2.81 1.17 0.00 97.00 2.81 1.17 0.00
45.00 2.81 1.17 0.00 98.00 2.81 1.17 0.00
46.00 2.81 1.17 0.00 99.00 2.81 1.17 0.00
47.00 2.81 1.17 0.00 100.00 2.81 1.17 0.00
48.00 2.81 1.17 0.00 101.00 2.81 1.17 0.00
49.00 2.81 1.17 0.00 102.00 2.81 1.17 0.00
50.00 2.81 1.17 0.00 103.00 2.81 1.17 0.00
51.00 2.81 1.17 0.00 104.00 2.81 1.17 0.00
52.00 2.81 1.17 0.00 105.00 2.81 1.17 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 6
Hydrograph for Subcatchment 1S: PRE (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 2.81 1.17 0.00
107.00 2.81 1.17 0.00
108.00 2.81 1.17 0.00
109.00 2.81 1.17 0.00
110.00 2.81 1.17 0.00
111.00 2.81 1.17 0.00
112.00 2.81 1.17 0.00
113.00 2.81 1.17 0.00
114.00 2.81 1.17 0.00
115.00 2.81 1.17 0.00
116.00 2.81 1.17 0.00
117.00 2.81 1.17 0.00
118.00 2.81 1.17 0.00
119.00 2.81 1.17 0.00
120.00 2.81 1.17 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 7
Summary for Subcatchment 2S: POST - A (ROUTED)
Runoff = 6.09 cfs @ 11.96 hrs, Volume= 0.281 af, Depth= 1.23"
Routed to Pond 3P : BMP A
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-Year Rainfall=2.81"
Area (sf) CN Description
72,929 98 Paved parking, HSG B
46,520 58 Woods/grass comb., Good, HSG B
119,449 82 Weighted Average
46,520 38.95% Pervious Area
72,929 61.05% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 2S: POST - A (ROUTED)
Hydrograph
•Runoff
6.09 cfs ±
6� �T�pe II 2�-hr
Runoff Area=119,449 sf
4 - - 1R9-npffrVolume�0.?-811 -af
!R ,ILn9iffiDeplh71.? '
LI 3 c 5.0min
6NL82
2-
1-
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 8
Hydrograph for Subcatchment 2S: POST - A (ROUTED)
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 2.81 1.23 0.00
1.00 0.03 0.00 0.00 54.00 2.81 1.23 0.00
2.00 0.06 0.00 0.00 55.00 2.81 1.23 0.00
3.00 0.10 0.00 0.00 56.00 2.81 1.23 0.00
4.00 0.13 0.00 0.00 57.00 2.81 1.23 0.00
5.00 0.18 0.00 0.00 58.00 2.81 1.23 0.00
6.00 0.22 0.00 0.00 59.00 2.81 1.23 0.00
7.00 0.28 0.00 0.00 60.00 2.81 1.23 0.00
8.00 0.34 0.00 0.00 61.00 2.81 1.23 0.00
9.00 0.41 0.00 0.00 62.00 2.81 1.23 0.00
10.00 0.51 0.00 0.02 63.00 2.81 1.23 0.00
11.00 0.66 0.02 0.09 64.00 2.81 1.23 0.00
12.00 1.86 0.56 5.40 65.00 2.81 1.23 0.00
13.00 2.17 0.76 0.35 66.00 2.81 1.23 0.00
14.00 2.30 0.86 0.21 67.00 2.81 1.23 0.00
15.00 2.40 0.92 0.17 68.00 2.81 1.23 0.00
16.00 2.47 0.98 0.13 69.00 2.81 1.23 0.00
17.00 2.53 1.02 0.12 70.00 2.81 1.23 0.00
18.00 2.59 1.06 0.11 71.00 2.81 1.23 0.00
19.00 2.64 1.10 0.09 72.00 2.81 1.23 0.00
20.00 2.68 1.13 0.08 73.00 2.81 1.23 0.00
21.00 2.71 1.16 0.07 74.00 2.81 1.23 0.00
22.00 2.75 1.18 0.07 75.00 2.81 1.23 0.00
23.00 2.78 1.21 0.07 76.00 2.81 1.23 0.00
24.00 2.81 1.23 0.07 77.00 2.81 1.23 0.00
25.00 2.81 1.23 0.00 78.00 2.81 1.23 0.00
26.00 2.81 1.23 0.00 79.00 2.81 1.23 0.00
27.00 2.81 1.23 0.00 80.00 2.81 1.23 0.00
28.00 2.81 1.23 0.00 81.00 2.81 1.23 0.00
29.00 2.81 1.23 0.00 82.00 2.81 1.23 0.00
30.00 2.81 1.23 0.00 83.00 2.81 1.23 0.00
31.00 2.81 1.23 0.00 84.00 2.81 1.23 0.00
32.00 2.81 1.23 0.00 85.00 2.81 1.23 0.00
33.00 2.81 1.23 0.00 86.00 2.81 1.23 0.00
34.00 2.81 1.23 0.00 87.00 2.81 1.23 0.00
35.00 2.81 1.23 0.00 88.00 2.81 1.23 0.00
36.00 2.81 1.23 0.00 89.00 2.81 1.23 0.00
37.00 2.81 1.23 0.00 90.00 2.81 1.23 0.00
38.00 2.81 1.23 0.00 91.00 2.81 1.23 0.00
39.00 2.81 1.23 0.00 92.00 2.81 1.23 0.00
40.00 2.81 1.23 0.00 93.00 2.81 1.23 0.00
41.00 2.81 1.23 0.00 94.00 2.81 1.23 0.00
42.00 2.81 1.23 0.00 95.00 2.81 1.23 0.00
43.00 2.81 1.23 0.00 96.00 2.81 1.23 0.00
44.00 2.81 1.23 0.00 97.00 2.81 1.23 0.00
45.00 2.81 1.23 0.00 98.00 2.81 1.23 0.00
46.00 2.81 1.23 0.00 99.00 2.81 1.23 0.00
47.00 2.81 1.23 0.00 100.00 2.81 1.23 0.00
48.00 2.81 1.23 0.00 101.00 2.81 1.23 0.00
49.00 2.81 1.23 0.00 102.00 2.81 1.23 0.00
50.00 2.81 1.23 0.00 103.00 2.81 1.23 0.00
51.00 2.81 1.23 0.00 104.00 2.81 1.23 0.00
52.00 2.81 1.23 0.00 105.00 2.81 1.23 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 9
Hydrograph for Subcatchment 2S: POST - A (ROUTED) (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 2.81 1.23 0.00
107.00 2.81 1.23 0.00
108.00 2.81 1.23 0.00
109.00 2.81 1.23 0.00
110.00 2.81 1.23 0.00
111.00 2.81 1.23 0.00
112.00 2.81 1.23 0.00
113.00 2.81 1.23 0.00
114.00 2.81 1.23 0.00
115.00 2.81 1.23 0.00
116.00 2.81 1.23 0.00
117.00 2.81 1.23 0.00
118.00 2.81 1.23 0.00
119.00 2.81 1.23 0.00
120.00 2.81 1.23 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 10
Summary for Subcatchment 4S: POST- B (BYPASSED)
Runoff = 2.07 cfs @ 11.95 hrs, Volume= 0.103 af, Depth= 2.17"
Routed to Link 5L : OUTFALL
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-Year Rainfall=2.81"
Area (ac) CN Description
0.508 98 Paved parking, HSG B
0.060 58 Woods/grass comb., Good, HSG B
0.568 94 Weighted Average
0.060 10.56% Pervious Area
0.508 89.44% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 4S: POST- B (BYPASSED)
Hydrograph
0 Runoff
Y� 2.07 cfs
2 — - - r—
1-Year Rainfall2.81"
IRunbff Area=0.568 ac
RLn9ff Volume=0.103 af
3 !Runoff Depth=2.17"
c=5.Omin
6NL94
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 11
Hydrograph for Subcatchment 4S: POST- B (BYPASSED)
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 2.81 2.17 0.00
1.00 0.03 0.00 0.00 54.00 2.81 2.17 0.00
2.00 0.06 0.00 0.00 55.00 2.81 2.17 0.00
3.00 0.10 0.00 0.00 56.00 2.81 2.17 0.00
4.00 0.13 0.00 0.00 57.00 2.81 2.17 0.00
5.00 0.18 0.00 0.00 58.00 2.81 2.17 0.00
6.00 0.22 0.01 0.01 59.00 2.81 2.17 0.00
7.00 0.28 0.03 0.01 60.00 2.81 2.17 0.00
8.00 0.34 0.05 0.02 61.00 2.81 2.17 0.00
9.00 0.41 0.09 0.03 62.00 2.81 2.17 0.00
10.00 0.51 0.14 0.04 63.00 2.81 2.17 0.00
11.00 0.66 0.24 0.08 64.00 2.81 2.17 0.00
12.00 1.86 1.27 1.75 65.00 2.81 2.17 0.00
13.00 2.17 1.56 0.10 66.00 2.81 2.17 0.00
14.00 2.30 1.68 0.06 67.00 2.81 2.17 0.00
15.00 2.40 1.77 0.05 68.00 2.81 2.17 0.00
16.00 2.47 1.84 0.04 69.00 2.81 2.17 0.00
17.00 2.53 1.90 0.03 70.00 2.81 2.17 0.00
18.00 2.59 1.95 0.03 71.00 2.81 2.17 0.00
19.00 2.64 2.00 0.02 72.00 2.81 2.17 0.00
20.00 2.68 2.04 0.02 73.00 2.81 2.17 0.00
21.00 2.71 2.07 0.02 74.00 2.81 2.17 0.00
22.00 2.75 2.10 0.02 75.00 2.81 2.17 0.00
23.00 2.78 2.14 0.02 76.00 2.81 2.17 0.00
24.00 2.81 2.17 0.02 77.00 2.81 2.17 0.00
25.00 2.81 2.17 0.00 78.00 2.81 2.17 0.00
26.00 2.81 2.17 0.00 79.00 2.81 2.17 0.00
27.00 2.81 2.17 0.00 80.00 2.81 2.17 0.00
28.00 2.81 2.17 0.00 81.00 2.81 2.17 0.00
29.00 2.81 2.17 0.00 82.00 2.81 2.17 0.00
30.00 2.81 2.17 0.00 83.00 2.81 2.17 0.00
31.00 2.81 2.17 0.00 84.00 2.81 2.17 0.00
32.00 2.81 2.17 0.00 85.00 2.81 2.17 0.00
33.00 2.81 2.17 0.00 86.00 2.81 2.17 0.00
34.00 2.81 2.17 0.00 87.00 2.81 2.17 0.00
35.00 2.81 2.17 0.00 88.00 2.81 2.17 0.00
36.00 2.81 2.17 0.00 89.00 2.81 2.17 0.00
37.00 2.81 2.17 0.00 90.00 2.81 2.17 0.00
38.00 2.81 2.17 0.00 91.00 2.81 2.17 0.00
39.00 2.81 2.17 0.00 92.00 2.81 2.17 0.00
40.00 2.81 2.17 0.00 93.00 2.81 2.17 0.00
41.00 2.81 2.17 0.00 94.00 2.81 2.17 0.00
42.00 2.81 2.17 0.00 95.00 2.81 2.17 0.00
43.00 2.81 2.17 0.00 96.00 2.81 2.17 0.00
44.00 2.81 2.17 0.00 97.00 2.81 2.17 0.00
45.00 2.81 2.17 0.00 98.00 2.81 2.17 0.00
46.00 2.81 2.17 0.00 99.00 2.81 2.17 0.00
47.00 2.81 2.17 0.00 100.00 2.81 2.17 0.00
48.00 2.81 2.17 0.00 101.00 2.81 2.17 0.00
49.00 2.81 2.17 0.00 102.00 2.81 2.17 0.00
50.00 2.81 2.17 0.00 103.00 2.81 2.17 0.00
51.00 2.81 2.17 0.00 104.00 2.81 2.17 0.00
52.00 2.81 2.17 0.00 105.00 2.81 2.17 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 12
Hydrograph for Subcatchment 4S: POST- B (BYPASSED) (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 2.81 2.17 0.00
107.00 2.81 2.17 0.00
108.00 2.81 2.17 0.00
109.00 2.81 2.17 0.00
110.00 2.81 2.17 0.00
111.00 2.81 2.17 0.00
112.00 2.81 2.17 0.00
113.00 2.81 2.17 0.00
114.00 2.81 2.17 0.00
115.00 2.81 2.17 0.00
116.00 2.81 2.17 0.00
117.00 2.81 2.17 0.00
118.00 2.81 2.17 0.00
119.00 2.81 2.17 0.00
120.00 2.81 2.17 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 13
Summary for Pond 3P: BMP A
Inflow Area = 2.742 ac, 61.05% Impervious, Inflow Depth = 1.23" for 1-Year event
Inflow = 6.09 cfs @ 11.96 hrs, Volume= 0.281 af
Outflow = 0.36 cfs @ 12.96 hrs, Volume= 0.281 af, Atten= 94%, Lag= 59.9 min
Primary = 0.36 cfs @ 12.96 hrs, Volume= 0.281 af
Routed to Link 5L : OUTFALL
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routed to Link 5L : OUTFALL
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 844.22' @ 12.96 hrs Surf.Area= 3,352 sf Storage= 6,529 cf
Plug-Flow detention time= 971.8 min calculated for 0.281 af(100% of inflow)
Center-of-Mass det. time= 971.6 min ( 1,810.2 - 838.5 )
Volume Invert Avail.Storage Storage Description
#1 841.50' 23,424 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
841.50 500 0 0
842.00 1,858 590 590
843.00 2,667 2,263 2,852
844.00 3,227 2,947 5,799
845.00 3,789 3,508 9,307
846.00 4,386 4,088 13,395
847.00 5,017 4,702 18,096
848.00 5,638 5,328 23,424
Device Routing Invert Outlet Devices
#1 Primary 839.33' 18.0" Round Culvert
L= 47.5' Box, headwall w/3 rounded edges, Ke= 0.200
Inlet/Outlet Invert= 839.33' /838.39' S= 0.0198 '/' Cc= 0.900
n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf
#2 Device 1 841.50' Special & User-Defined
Head (feet) 0.00 1.00 2.00 3.00 4.00 5.00
Disch. (cfs) 0.000 0.029 0.039 0.048 0.058 0.068
#3 Device 1 843.86' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#4 Secondary 847.60' 10.0' long x 10.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64
Primary OutFlow Max=0.36 cfs @ 12.96 hrs HW=844.22' (Free Discharge)
4-1=Culvert (Passes 0.36 cfs of 21.19 cfs potential flow)
'2=Special & User-Defined (Custom Controls 0.05 cfs)
3=Orifice/Grate (Orifice Controls 0.31 cfs @ 2.05 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=841.50' (Free Discharge)
L4=Broad-Crested Rectangular Weir( Controls 0.00 cfs)

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 14
Pond 3P: BMP A
Hydrograph
6.09 cfs ❑Inflow
❑Outflow
Inflow Area=2.742 ac o se ondary
/ Peak Elev=844.22'
6
1 1 1 1 1 I Storage=6,529 cf
5
4
31 Z 1 T T TIT 1 1
2:/ / — T T — 4 1 1 1
I z
1 L 0.36 cfs 0.00 cfs�/�.( . , ///l , ///ll/ , , ,, /// , /, ,
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 15
Hydrograph for Pond 3P: BMP A
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
0.00 0.00 0 841.50 0.00 0.00 0.00
1.00 0.00 0 841.50 0.00 0.00 0.00
2.00 0.00 0 841.50 0.00 0.00 0.00
3.00 0.00 0 841.50 0.00 0.00 0.00
4.00 0.00 0 841.50 0.00 0.00 0.00
5.00 0.00 0 841.50 0.00 0.00 0.00
6.00 0.00 0 841.50 0.00 0.00 0.00
7.00 0.00 0 841.50 0.00 0.00 0.00
8.00 0.00 0 841.50 0.00 0.00 0.00
9.00 0.00 0 841.50 0.00 0.00 0.00
10.00 0.02 16 841.53 0.00 0.00 0.00
11.00 0.09 165 841.71 0.01 0.01 0.00
12.00 5.40 4,362 843.54 0.04 0.04 0.00
13.00 0.35 6,528 844.22 0.36 0.36 0.00
14.00 0.21 6,335 844.16 0.28 0.28 0.00
15.00 0.17 6,149 844.11 0.21 0.21 0.00
16.00 0.13 6,024 844.07 0.17 0.17 0.00
17.00 0.12 5,932 844.04 0.14 0.14 0.00
18.00 0.11 5,873 844.02 0.12 0.12 0.00
19.00 0.09 5,819 844.01 0.11 0.11 0.00
20.00 0.08 5,765 843.99 0.09 0.09 0.00
21.00 0.07 5,720 843.98 0.08 0.08 0.00
22.00 0.07 5,692 843.97 0.08 0.08 0.00
23.00 0.07 5,670 843.96 0.07 0.07 0.00
24.00 0.07 5,649 843.95 0.07 0.07 0.00
25.00 0.00 5,459 843.89 0.05 0.05 0.00
26.00 0.00 5,301 843.84 0.04 0.04 0.00
27.00 0.00 5,150 843.80 0.04 0.04 0.00
28.00 0.00 5,001 843.75 0.04 0.04 0.00
29.00 0.00 4,853 843.70 0.04 0.04 0.00
30.00 0.00 4,707 843.65 0.04 0.04 0.00
31.00 0.00 4,563 843.60 0.04 0.04 0.00
32.00 0.00 4,420 843.56 0.04 0.04 0.00
33.00 0.00 4,278 843.51 0.04 0.04 0.00
34.00 0.00 4,138 843.46 0.04 0.04 0.00
35.00 0.00 4,000 843.41 0.04 0.04 0.00
36.00 0.00 3,864 843.37 0.04 0.04 0.00
37.00 0.00 3,729 843.32 0.04 0.04 0.00
38.00 0.00 3,596 843.27 0.04 0.04 0.00
39.00 0.00 3,465 843.22 0.04 0.04 0.00
40.00 0.00 3,335 843.18 0.04 0.04 0.00
41.00 0.00 3,207 843.13 0.04 0.04 0.00
42.00 0.00 3,081 843.08 0.03 0.03 0.00
43.00 0.00 2,956 843.04 0.03 0.03 0.00
44.00 0.00 2,833 842.99 0.03 0.03 0.00
45.00 0.00 2,712 842.95 0.03 0.03 0.00
46.00 0.00 2,592 842.90 0.03 0.03 0.00
47.00 0.00 2,474 842.86 0.03 0.03 0.00
48.00 0.00 2,358 842.81 0.03 0.03 0.00
49.00 0.00 2,243 842.76 0.03 0.03 0.00
50.00 0.00 2,130 842.72 0.03 0.03 0.00
51.00 0.00 2,019 842.67 0.03 0.03 0.00
52.00 0.00 1,909 842.63 0.03 0.03 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 16
Hydrograph for Pond 3P: BMP A (continued)
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
53.00 0.00 1,801 842.58 0.03 0.03 0.00
54.00 0.00 1,695 842.53 0.03 0.03 0.00
55.00 0.00 1,590 842.49 0.03 0.03 0.00
56.00 0.00 1,489 842.44 0.03 0.03 0.00
57.00 0.00 1,393 842.40 0.03 0.03 0.00
58.00 0.00 1,302 842.36 0.02 0.02 0.00
59.00 0.00 1,215 842.31 0.02 0.02 0.00
60.00 0.00 1,132 842.28 0.02 0.02 0.00
61.00 0.00 1,053 842.24 0.02 0.02 0.00
62.00 0.00 978 842.20 0.02 0.02 0.00
63.00 0.00 907 842.16 0.02 0.02 0.00
64.00 0.00 839 842.13 0.02 0.02 0.00
65.00 0.00 775 842.10 0.02 0.02 0.00
66.00 0.00 714 842.07 0.02 0.02 0.00
67.00 0.00 657 842.04 0.02 0.02 0.00
68.00 0.00 602 842.01 0.01 0.01 0.00
69.00 0.00 551 841.98 0.01 0.01 0.00
70.00 0.00 502 841.95 0.01 0.01 0.00
71.00 0.00 457 841.92 0.01 0.01 0.00
72.00 0.00 414 841.90 0.01 0.01 0.00
73.00 0.00 374 841.87 0.01 0.01 0.00
74.00 0.00 336 841.85 0.01 0.01 0.00
75.00 0.00 301 841.82 0.01 0.01 0.00
76.00 0.00 269 841.80 0.01 0.01 0.00
77.00 0.00 239 841.77 0.01 0.01 0.00
78.00 0.00 212 841.75 0.01 0.01 0.00
79.00 0.00 187 841.73 0.01 0.01 0.00
80.00 0.00 164 841.71 0.01 0.01 0.00
81.00 0.00 143 841.69 0.01 0.01 0.00
82.00 0.00 125 841.67 0.00 0.00 0.00
83.00 0.00 108 841.65 0.00 0.00 0.00
84.00 0.00 93 841.64 0.00 0.00 0.00
85.00 0.00 80 841.62 0.00 0.00 0.00
86.00 0.00 68 841.60 0.00 0.00 0.00
87.00 0.00 58 841.59 0.00 0.00 0.00
88.00 0.00 49 841.58 0.00 0.00 0.00
89.00 0.00 41 841.57 0.00 0.00 0.00
90.00 0.00 35 841.56 0.00 0.00 0.00
91.00 0.00 29 841.55 0.00 0.00 0.00
92.00 0.00 24 841.54 0.00 0.00 0.00
93.00 0.00 20 841.53 0.00 0.00 0.00
94.00 0.00 17 841.53 0.00 0.00 0.00
95.00 0.00 14 841.52 0.00 0.00 0.00
96.00 0.00 12 841.52 0.00 0.00 0.00
97.00 0.00 10 841.52 0.00 0.00 0.00
98.00 0.00 8 841.51 0.00 0.00 0.00
99.00 0.00 7 841.51 0.00 0.00 0.00
100.00 0.00 6 841.51 0.00 0.00 0.00
101.00 0.00 5 841.51 0.00 0.00 0.00
102.00 0.00 4 841.51 0.00 0.00 0.00
103.00 0.00 3 841.51 0.00 0.00 0.00
104.00 0.00 3 841.50 0.00 0.00 0.00
105.00 0.00 2 841.50 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 17
Hydrograph for Pond 3P: BMP A (continued)
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
106.00 0.00 2 841.50 0.00 0.00 0.00
107.00 0.00 2 841.50 0.00 0.00 0.00
108.00 0.00 1 841.50 0.00 0.00 0.00
109.00 0.00 1 841.50 0.00 0.00 0.00
110.00 0.00 1 841.50 0.00 0.00 0.00
111.00 0.00 1 841.50 0.00 0.00 0.00
112.00 0.00 1 841.50 0.00 0.00 0.00
113.00 0.00 1 841.50 0.00 0.00 0.00
114.00 0.00 0 841.50 0.00 0.00 0.00
115.00 0.00 0 841.50 0.00 0.00 0.00
116.00 0.00 0 841.50 0.00 0.00 0.00
117.00 0.00 0 841.50 0.00 0.00 0.00
118.00 0.00 0 841.50 0.00 0.00 0.00
119.00 0.00 0 841.50 0.00 0.00 0.00
120.00 0.00 0 841.50 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 18
Stage-Discharge for Pond 3P: BMP A
Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs)
841.50 0.00 0.00 0.00 846.80 1.62 1.62 0.00
841.60 0.00 0.00 0.00 846.90 1.65 1.65 0.00
841.70 0.01 0.01 0.00 847.00 1.68 1.68 0.00
841.80 0.01 0.01 0.00 847.10 1.70 1.70 0.00
841.90 0.01 0.01 0.00 847.20 1.73 1.73 0.00
842.00 0.01 0.01 0.00 847.30 1.76 1.76 0.00
842.10 0.02 0.02 0.00 847.40 1.78 1.78 0.00
842.20 0.02 0.02 0.00 847.50 1.81 1.81 0.00
842.30 0.02 0.02 0.00 847.60 1.83 1.83 0.00
842.40 0.03 0.03 0.00 847.70 2.65 1.86 0.79
842.50 0.03 0.03 0.00 847.80 4.11 1.88 2.23
842.60 0.03 0.03 0.00 847.90 6.06 1.91 4.15
842.70 0.03 0.03 0.00 848.00 8.41 1.93 6.48
842.80 0.03 0.03 0.00
842.90 0.03 0.03 0.00
843.00 0.03 0.03 0.00
843.10 0.04 0.04 0.00
843.20 0.04 0.04 0.00
843.30 0.04 0.04 0.00
843.40 0.04 0.04 0.00
843.50 0.04 0.04 0.00
843.60 0.04 0.04 0.00
843.70 0.04 0.04 0.00
843.80 0.04 0.04 0.00
843.90 0.05 0.05 0.00
844.00 0.10 0.10 0.00
844.10 0.20 0.20 0.00
844.20 0.33 0.33 0.00
844.30 0.46 0.46 0.00
844.40 0.56 0.56 0.00
844.50 0.64 0.64 0.00
844.60 0.71 0.71 0.00
844.70 0.78 0.78 0.00
844.80 0.84 0.84 0.00
844.90 0.89 0.89 0.00
845.00 0.94 0.94 0.00
845.10 0.99 0.99 0.00
845.20 1.04 1.04 0.00
845.30 1.09 1.09 0.00
845.40 1.13 1.13 0.00
845.50 1.17 1.17 0.00
845.60 1.21 1.21 0.00
845.70 1.25 1.25 0.00
845.80 1.29 1.29 0.00
845.90 1.33 1.33 0.00
846.00 1.36 1.36 0.00
846.10 1.40 1.40 0.00
846.20 1.43 1.43 0.00
846.30 1.47 1.47 0.00
846.40 1.50 1.50 0.00
846.50 1.53 1.53 0.00
846.60 1.56 1.56 0.00
846.70 1.59 1.59 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 19
Stage-Area-Storage for Pond 3P: BMP A
Elevation Surface Storage Elevation Surface Storage
(feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet)
841.50 500 0 846.80 4,891 17,105
841.60 772 64 846.90 4,954 17,597
841.70 1,043 154 847.00 5,017 18,096
841.80 1,315 272 847.10 5,079 18,601
841.90 1,586 417 847.20 5,141 19,112
842.00 1,858 590 847.30 5,203 19,629
842.10 1,939 779 847.40 5,265 20,152
842.20 2,020 977 847.50 5,328 20,682
842.30 2,101 1,183 847.60 5,390 21,218
842.40 2,182 1,397 847.70 5,452 21,760
842.50 2,263 1,620 847.80 5,514 22,308
842.60 2,343 1,850 847.90 5,576 22,863
842.70 2,424 2,088 848.00 5,638 23,424
842.80 2,505 2,335
842.90 2,586 2,589
843.00 2,667 2,852
843.10 2,723 3,122
843.20 2,779 3,397
843.30 2,835 3,677
843.40 2,891 3,964
843.50 2,947 4,256
843.60 3,003 4,553
843.70 3,059 4,856
843.80 3,115 5,165
843.90 3,171 5,479
844.00 3,227 5,799
844.10 3,283 6,125
844.20 3,339 6,456
844.30 3,396 6,792
844.40 3,452 7,135
844.50 3,508 7,483
844.60 3,564 7,836
844.70 3,620 8,196
844.80 3,677 8,560
844.90 3,733 8,931
845.00 3,789 9,307
845.10 3,849 9,689
845.20 3,908 10,077
845.30 3,968 10,471
845.40 4,028 10,870
845.50 4,088 11,276
845.60 4,147 11,688
845.70 4,207 12,106
845.80 4,267 12,529
845.90 4,326 12,959
846.00 4,386 13,395
846.10 4,449 13,836
846.20 4,512 14,284
846.30 4,575 14,739
846.40 4,638 15,199
846.50 4,702 15,666
846.60 4,765 16,140
846.70 4,828 16,619

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 20
Summary for Link 5L: OUTFALL
Inflow Area = 3.310 ac, 65.92% Impervious, Inflow Depth = 1.39" for 1-Year event
Inflow = 2.11 cfs @ 11.95 hrs, Volume= 0.384 of
Primary = 2.11 cfs @ 11.95 hrs, Volume= 0.384 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 5L: OUTFALL
Hydrograph
I
9 11 rf ❑Inflow
❑Primary
_ 2.11 cfs Inflow Area=3.310 ac
2— I I I I
U
-
LL 1—
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 21
Hydrograph for Link 5L: OUTFALL
Time Inflow Elevation Primary Time Inflow Elevation Primary
(hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs)
0.00 0.00 0.00 0.00 53.00 0.03 0.00 0.03
1.00 0.00 0.00 0.00 54.00 0.03 0.00 0.03
2.00 0.00 0.00 0.00 55.00 0.03 0.00 0.03
3.00 0.00 0.00 0.00 56.00 0.03 0.00 0.03
4.00 0.00 0.00 0.00 57.00 0.03 0.00 0.03
5.00 0.00 0.00 0.00 58.00 0.02 0.00 0.02
6.00 0.01 0.00 0.01 I 59.00 0.02 0.00 0.02
7.00 0.01 0.00 0.01 60.00 0.02 0.00 0.02
8.00 0.02 0.00 0.02 61.00 0.02 0.00 0.02
9.00 0.03 0.00 0.03 62.00 0.02 0.00 0.02
10.00 0.04 0.00 0.04 L 63.00 0.02 0.00 0.02
11.00 0.08 0.00 0.08 I 64.00 0.02 0.00 0.02
12.00 1.79 0.00 1.79 65.00 0.02 0.00 0.02
13.00 0.46 0.00 0.46 66.00 0.02 0.00 0.02
14.00 0.34 0.00 0.34 67.00 0.02 0.00 0.02
15.00 0.26 0.00 0.26 68.00 0.01 0.00 0.01
16.00 0.20 0.00 0.20 69.00 0.01 0.00 0.01
17.00 0.17 0.00 0.17 I 70.00 0.01 0.00 0.01
18.00 0.15 0.00 0.15 71.00 0.01 0.00 0.01
19.00 0.13 0.00 0.13 72.00 0.01 0.00 0.01
20.00 0.11 0.00 0.11 73.00 0.01 0.00 0.01
21.00 0.10 0.00 0.10 74.00 0.01 0.00 0.01
22.00 0.10 0.00 0.10 75.00 0.01 0.00 0.01
23.00 0.09 0.00 0.09 76.00 0.01 0.00 0.01
24.00 0.09 0.00 0.09 77.00 0.01 0.00 0.01
25.00 0.05 0.00 0.05 78.00 0.01 0.00 0.01
26.00 0.04 0.00 0.04 79.00 0.01 0.00 0.01
27.00 0.04 0.00 0.04 80.00 0.01 0.00 0.01
28.00 0.04 0.00 0.04 81.00 0.01 0.00 0.01
29.00 0.04 0.00 0.04 82.00 0.00 0.00 0.00
30.00 0.04 0.00 0.04 83.00 0.00 0.00 0.00
31.00 0.04 0.00 0.04 84.00 0.00 0.00 0.00
32.00 0.04 0.00 0.04 85.00 0.00 0.00 0.00
33.00 0.04 0.00 0.04 86.00 0.00 0.00 0.00
34.00 0.04 0.00 0.04 87.00 0.00 0.00 0.00
35.00 0.04 0.00 0.04 88.00 0.00 0.00 0.00
36.00 0.04 0.00 0.04 89.00 0.00 0.00 0.00
37.00 0.04 0.00 0.04 90.00 0.00 0.00 0.00
38.00 0.04 0.00 0.04 91.00 0.00 0.00 0.00
39.00 0.04 0.00 0.04 92.00 0.00 0.00 0.00
40.00 0.04 0.00 0.04 93.00 0.00 0.00 0.00
41.00 0.04 0.00 0.04 94.00 0.00 0.00 0.00
42.00 0.03 0.00 0.03 95.00 0.00 0.00 0.00
43.00 0.03 0.00 0.03 96.00 0.00 0.00 0.00
44.00 0.03 0.00 0.03 97.00 0.00 0.00 0.00
45.00 0.03 0.00 0.03 98.00 0.00 0.00 0.00
46.00 0.03 0.00 0.03 99.00 0.00 0.00 0.00
47.00 0.03 0.00 0.03 100.00 0.00 0.00 0.00
48.00 0.03 0.00 0.03 101.00 0.00 0.00 0.00
49.00 0.03 0.00 0.03 102.00 0.00 0.00 0.00
50.00 0.03 0.00 0.03 103.00 0.00 0.00 0.00
51.00 0.03 0.00 0.03 104.00 0.00 0.00 0.00
52.00 0.03 0.00 0.03 105.00 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 1124-hr 1-Year Rainfall=2.81"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 22
Hydrograph for Link 5L: OUTFALL (continued)
Time Inflow Elevation Primary
(hours) (cfs) (feet) (cfs)
106.00 0.00 0.00 0.00
107.00 0.00 0.00 0.00
108.00 0.00 0.00 0.00
109.00 0.00 0.00 0.00
110.00 0.00 0.00 0.00
111.00 0.00 0.00 0.00
112.00 0.00 0.00 0.00
113.00 0.00 0.00 0.00
114.00 0.00 0.00 0.00
115.00 0.00 0.00 0.00
116.00 0.00 0.00 0.00
117.00 0.00 0.00 0.00
118.00 0.00 0.00 0.00
119.00 0.00 0.00 0.00
120.00 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 23
Time span=0.00-120.00 hrs, dt=0.05 hrs, 2401 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment 1 S: PRE Runoff Area=1.630 ac 57.30% Impervious Runoff Depth=1.71"
Tc=5.0 min CN=81 Runoff=7.21 cfs 0.232 af
Subcatchment2S: POST- A(ROUTED) Runoff Area=119,449 sf 61.05% Impervious Runoff Depth=1.78"
Tc=5.0 min CN=82 Runoff=12.61 cfs 0.407 af
Subcatchment4S: POST-B (BYPASSED) Runoff Area=0.568 ac 89.44% Impervious Runoff Depth=2.84"
Tc=5.0 min CN=94 Runoff=3.78 cfs 0.134 af
Pond 3P: BMP A Peak Elev=845.37' Storage=10,745 cf Inflow=12.61 cfs 0.407 af
Primary=1.12 cfs 0.407 af Secondary=0.00 cfs 0.000 af Outflow=1.12 cfs 0.407 af
Link 5L: OUTFALL Inflow=4.05 cfs 0.542 af
Primary=4.05 cfs 0.542 af
Total Runoff Area = 4.940 ac Runoff Volume = 0.774 af Average Runoff Depth = 1.88"
36.92% Pervious = 1.824 ac 63.08% Impervious = 3.116 ac

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 24
Summary for Subcatchment 1S: PRE
Runoff = 7.21 cfs @ 2.96 hrs, Volume= 0.232 af, Depth= 1.71"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 6-hr 10-Year Rainfall=3.50"
Area (ac) CN Description
0.934 98 Paved parking, HSG B
0.696 58 Woods/grass comb., Good, HSG B
1.630 81 Weighted Average
0.696 42.70% Pervious Area
0.934 57.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 1 S: PRE
Hydrograph
8� •Runoff
7.21 cfs
72/ 11ype�I
6-her
10-Yearf RaiffaII03.50"
5 IRtimpff Area=1.f3Q ap
-ItL!nOffV•Fr 3Iume-0.� -ff
4
o / Runoff De th=1.71
3
614
2 / I I I I
1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 25
Hydrograph for Subcatchment 1S: PRE
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 3.50 1.71 0.00
1.00 0.17 0.00 0.00 54.00 3.50 1.71 0.00
2.00 0.44 0.00 0.00 55.00 3.50 1.71 0.00
3.00 2.56 0.98 6.43 56.00 3.50 1.71 0.00
4.00 3.10 1.39 0.41 57.00 3.50 1.71 0.00
5.00 3.33 1.58 0.25 58.00 3.50 1.71 0.00
6.00 3.50 1.71 0.20 59.00 3.50 1.71 0.00
7.00 3.50 1.71 0.00 60.00 3.50 1.71 0.00
8.00 3.50 1.71 0.00 61.00 3.50 1.71 0.00
9.00 3.50 1.71 0.00 62.00 3.50 1.71 0.00
10.00 3.50 1.71 0.00 63.00 3.50 1.71 0.00
11.00 3.50 1.71 0.00 64.00 3.50 1.71 0.00
12.00 3.50 1.71 0.00 65.00 3.50 1.71 0.00
13.00 3.50 1.71 0.00 66.00 3.50 1.71 0.00
14.00 3.50 1.71 0.00 67.00 3.50 1.71 0.00
15.00 3.50 1.71 0.00 68.00 3.50 1.71 0.00
16.00 3.50 1.71 0.00 69.00 3.50 1.71 0.00
17.00 3.50 1.71 0.00 70.00 3.50 1.71 0.00
18.00 3.50 1.71 0.00 71.00 3.50 1.71 0.00
19.00 3.50 1.71 0.00 72.00 3.50 1.71 0.00
20.00 3.50 1.71 0.00 73.00 3.50 1.71 0.00
21.00 3.50 1.71 0.00 74.00 3.50 1.71 0.00
22.00 3.50 1.71 0.00 75.00 3.50 1.71 0.00
23.00 3.50 1.71 0.00 76.00 3.50 1.71 0.00
24.00 3.50 1.71 0.00 77.00 3.50 1.71 0.00
25.00 3.50 1.71 0.00 78.00 3.50 1.71 0.00
26.00 3.50 1.71 0.00 79.00 3.50 1.71 0.00
27.00 3.50 1.71 0.00 80.00 3.50 1.71 0.00
28.00 3.50 1.71 0.00 81.00 3.50 1.71 0.00
29.00 3.50 1.71 0.00 82.00 3.50 1.71 0.00
30.00 3.50 1.71 0.00 83.00 3.50 1.71 0.00
31.00 3.50 1.71 0.00 84.00 3.50 1.71 0.00
32.00 3.50 1.71 0.00 85.00 3.50 1.71 0.00
33.00 3.50 1.71 0.00 86.00 3.50 1.71 0.00
34.00 3.50 1.71 0.00 87.00 3.50 1.71 0.00
35.00 3.50 1.71 0.00 88.00 3.50 1.71 0.00
36.00 3.50 1.71 0.00 89.00 3.50 1.71 0.00
37.00 3.50 1.71 0.00 90.00 3.50 1.71 0.00
38.00 3.50 1.71 0.00 91.00 3.50 1.71 0.00
39.00 3.50 1.71 0.00 92.00 3.50 1.71 0.00
40.00 3.50 1.71 0.00 93.00 3.50 1.71 0.00
41.00 3.50 1.71 0.00 94.00 3.50 1.71 0.00
42.00 3.50 1.71 0.00 95.00 3.50 1.71 0.00
43.00 3.50 1.71 0.00 96.00 3.50 1.71 0.00
44.00 3.50 1.71 0.00 97.00 3.50 1.71 0.00
45.00 3.50 1.71 0.00 98.00 3.50 1.71 0.00
46.00 3.50 1.71 0.00 99.00 3.50 1.71 0.00
47.00 3.50 1.71 0.00 100.00 3.50 1.71 0.00
48.00 3.50 1.71 0.00 101.00 3.50 1.71 0.00
49.00 3.50 1.71 0.00 102.00 3.50 1.71 0.00
50.00 3.50 1.71 0.00 103.00 3.50 1.71 0.00
51.00 3.50 1.71 0.00 104.00 3.50 1.71 0.00
52.00 3.50 1.71 0.00 105.00 3.50 1.71 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 26
Hydrograph for Subcatchment 1S: PRE (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 3.50 1.71 0.00
107.00 3.50 1.71 0.00
108.00 3.50 1.71 0.00
109.00 3.50 1.71 0.00
110.00 3.50 1.71 0.00
111.00 3.50 1.71 0.00
112.00 3.50 1.71 0.00
113.00 3.50 1.71 0.00
114.00 3.50 1.71 0.00
115.00 3.50 1.71 0.00
116.00 3.50 1.71 0.00
117.00 3.50 1.71 0.00
118.00 3.50 1.71 0.00
119.00 3.50 1.71 0.00
120.00 3.50 1.71 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 27
Summary for Subcatchment 2S: POST - A (ROUTED)
Runoff = 12.61 cfs @ 2.96 hrs, Volume= 0.407 af, Depth= 1.78"
Routed to Pond 3P : BMP A
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 6-hr 10-Year Rainfall=3.50"
Area (sf) CN Description
72,929 98 Paved parking, HSG B
46,520 58 Woods/grass comb., Good, HSG B
119,449 82 Weighted Average
46,520 38.95% Pervious Area
72,929 61.05% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 2S: POST - A (ROUTED)
Hydrograph
14 ( ■Runoff
12.61 cfs
1 _ 1 L _H _LTJyp;e_il _
12-'
E 4 r
10 104Yeait Raifhf II03.507
I I I Runoff A�rela�19, 4��f
7 -R�rn -Vine-0. 0 of
° = // Runoff De ='I "
- 6-
5- +c 5.0 �nTi
3- / I I I I
2-
0 ,/ff/,/f(/,/ ,/ /f(//(f// /fl//!l//lf/,/l!/,/fl/,/!l/,/lf/, , ,
0 5 10 15 20 25 30 35 40 45 50 55 •
60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 28
Hydrograph for Subcatchment 2S: POST - A (ROUTED)
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 3.50 1.78 0.00
1.00 0.17 0.00 0.00 54.00 3.50 1.78 0.00
2.00 0.44 0.00 0.00 55.00 3.50 1.78 0.00
3.00 2.56 1.04 11.20 56.00 3.50 1.78 0.00
4.00 3.10 1.46 0.71 57.00 3.50 1.78 0.00
5.00 3.33 1.65 0.43 58.00 3.50 1.78 0.00
6.00 3.50 1.78 0.34 59.00 3.50 1.78 0.00
7.00 3.50 1.78 0.00 60.00 3.50 1.78 0.00
8.00 3.50 1.78 0.00 61.00 3.50 1.78 0.00
9.00 3.50 1.78 0.00 62.00 3.50 1.78 0.00
10.00 3.50 1.78 0.00 63.00 3.50 1.78 0.00
11.00 3.50 1.78 0.00 64.00 3.50 1.78 0.00
12.00 3.50 1.78 0.00 65.00 3.50 1.78 0.00
13.00 3.50 1.78 0.00 66.00 3.50 1.78 0.00
14.00 3.50 1.78 0.00 67.00 3.50 1.78 0.00
15.00 3.50 1.78 0.00 68.00 3.50 1.78 0.00
16.00 3.50 1.78 0.00 69.00 3.50 1.78 0.00
17.00 3.50 1.78 0.00 70.00 3.50 1.78 0.00
18.00 3.50 1.78 0.00 71.00 3.50 1.78 0.00
19.00 3.50 1.78 0.00 72.00 3.50 1.78 0.00
20.00 3.50 1.78 0.00 73.00 3.50 1.78 0.00
21.00 3.50 1.78 0.00 74.00 3.50 1.78 0.00
22.00 3.50 1.78 0.00 75.00 3.50 1.78 0.00
23.00 3.50 1.78 0.00 76.00 3.50 1.78 0.00
24.00 3.50 1.78 0.00 77.00 3.50 1.78 0.00
25.00 3.50 1.78 0.00 78.00 3.50 1.78 0.00
26.00 3.50 1.78 0.00 79.00 3.50 1.78 0.00
27.00 3.50 1.78 0.00 80.00 3.50 1.78 0.00
28.00 3.50 1.78 0.00 81.00 3.50 1.78 0.00
29.00 3.50 1.78 0.00 82.00 3.50 1.78 0.00
30.00 3.50 1.78 0.00 83.00 3.50 1.78 0.00
31.00 3.50 1.78 0.00 84.00 3.50 1.78 0.00
32.00 3.50 1.78 0.00 85.00 3.50 1.78 0.00
33.00 3.50 1.78 0.00 86.00 3.50 1.78 0.00
34.00 3.50 1.78 0.00 87.00 3.50 1.78 0.00
35.00 3.50 1.78 0.00 88.00 3.50 1.78 0.00
36.00 3.50 1.78 0.00 89.00 3.50 1.78 0.00
37.00 3.50 1.78 0.00 90.00 3.50 1.78 0.00
38.00 3.50 1.78 0.00 91.00 3.50 1.78 0.00
39.00 3.50 1.78 0.00 92.00 3.50 1.78 0.00
40.00 3.50 1.78 0.00 93.00 3.50 1.78 0.00
41.00 3.50 1.78 0.00 94.00 3.50 1.78 0.00
42.00 3.50 1.78 0.00 95.00 3.50 1.78 0.00
43.00 3.50 1.78 0.00 96.00 3.50 1.78 0.00
44.00 3.50 1.78 0.00 97.00 3.50 1.78 0.00
45.00 3.50 1.78 0.00 98.00 3.50 1.78 0.00
46.00 3.50 1.78 0.00 99.00 3.50 1.78 0.00
47.00 3.50 1.78 0.00 100.00 3.50 1.78 0.00
48.00 3.50 1.78 0.00 101.00 3.50 1.78 0.00
49.00 3.50 1.78 0.00 102.00 3.50 1.78 0.00
50.00 3.50 1.78 0.00 103.00 3.50 1.78 0.00
51.00 3.50 1.78 0.00 104.00 3.50 1.78 0.00
52.00 3.50 1.78 0.00 105.00 3.50 1.78 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 29
Hydrograph for Subcatchment 2S: POST - A (ROUTED) (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 3.50 1.78 0.00
107.00 3.50 1.78 0.00
108.00 3.50 1.78 0.00
109.00 3.50 1.78 0.00
110.00 3.50 1.78 0.00
111.00 3.50 1.78 0.00
112.00 3.50 1.78 0.00
113.00 3.50 1.78 0.00
114.00 3.50 1.78 0.00
115.00 3.50 1.78 0.00
116.00 3.50 1.78 0.00
117.00 3.50 1.78 0.00
118.00 3.50 1.78 0.00
119.00 3.50 1.78 0.00
120.00 3.50 1.78 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 30
Summary for Subcatchment 4S: POST- B (BYPASSED)
Runoff = 3.78 cfs @ 2.95 hrs, Volume= 0.134 af, Depth= 2.84"
Routed to Link 5L : OUTFALL
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 6-hr 10-Year Rainfall=3.50"
Area (ac) CN Description
0.508 98 Paved parking, HSG B
0.060 58 Woods/grass comb., Good, HSG B
0.568 94 Weighted Average
0.060 10.56% Pervious Area
0.508 89.44% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 4S: POST- B (BYPASSED)
Hydrograph
■Runoff
3.78 cfs "r e
yp
e-her
3 104Yearf Rainfall=3.507
IRLncff Area=0.568 ac
Run ff}VQIume-0.'L34
3 of
2 I I Q i84 n
° Runoff Depth=2.
LL /
Tc=5.0 t1nii
C 94
1 •
I0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 31
Hydrograph for Subcatchment 4S: POST- B (BYPASSED)
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 3.50 2.84 0.00
1.00 0.17 0.00 0.01 54.00 3.50 2.84 0.00
2.00 0.44 0.10 0.10 55.00 3.50 2.84 0.00
3.00 2.56 1.92 3.19 56.00 3.50 2.84 0.00
4.00 3.10 2.44 0.18 57.00 3.50 2.84 0.00
5.00 3.33 2.67 0.11 58.00 3.50 2.84 0.00
6.00 3.50 2.84 0.08 59.00 3.50 2.84 0.00
7.00 3.50 2.84 0.00 60.00 3.50 2.84 0.00
8.00 3.50 2.84 0.00 61.00 3.50 2.84 0.00
9.00 3.50 2.84 0.00 62.00 3.50 2.84 0.00
10.00 3.50 2.84 0.00 63.00 3.50 2.84 0.00
11.00 3.50 2.84 0.00 64.00 3.50 2.84 0.00
12.00 3.50 2.84 0.00 65.00 3.50 2.84 0.00
13.00 3.50 2.84 0.00 66.00 3.50 2.84 0.00
14.00 3.50 2.84 0.00 67.00 3.50 2.84 0.00
15.00 3.50 2.84 0.00 68.00 3.50 2.84 0.00
16.00 3.50 2.84 0.00 69.00 3.50 2.84 0.00
17.00 3.50 2.84 0.00 70.00 3.50 2.84 0.00
18.00 3.50 2.84 0.00 71.00 3.50 2.84 0.00
19.00 3.50 2.84 0.00 72.00 3.50 2.84 0.00
20.00 3.50 2.84 0.00 73.00 3.50 2.84 0.00
21.00 3.50 2.84 0.00 74.00 3.50 2.84 0.00
22.00 3.50 2.84 0.00 75.00 3.50 2.84 0.00
23.00 3.50 2.84 0.00 76.00 3.50 2.84 0.00
24.00 3.50 2.84 0.00 77.00 3.50 2.84 0.00
25.00 3.50 2.84 0.00 78.00 3.50 2.84 0.00
26.00 3.50 2.84 0.00 79.00 3.50 2.84 0.00
27.00 3.50 2.84 0.00 80.00 3.50 2.84 0.00
28.00 3.50 2.84 0.00 81.00 3.50 2.84 0.00
29.00 3.50 2.84 0.00 82.00 3.50 2.84 0.00
30.00 3.50 2.84 0.00 83.00 3.50 2.84 0.00
31.00 3.50 2.84 0.00 84.00 3.50 2.84 0.00
32.00 3.50 2.84 0.00 85.00 3.50 2.84 0.00
33.00 3.50 2.84 0.00 86.00 3.50 2.84 0.00
34.00 3.50 2.84 0.00 87.00 3.50 2.84 0.00
35.00 3.50 2.84 0.00 88.00 3.50 2.84 0.00
36.00 3.50 2.84 0.00 89.00 3.50 2.84 0.00
37.00 3.50 2.84 0.00 90.00 3.50 2.84 0.00
38.00 3.50 2.84 0.00 91.00 3.50 2.84 0.00
39.00 3.50 2.84 0.00 92.00 3.50 2.84 0.00
40.00 3.50 2.84 0.00 93.00 3.50 2.84 0.00
41.00 3.50 2.84 0.00 94.00 3.50 2.84 0.00
42.00 3.50 2.84 0.00 95.00 3.50 2.84 0.00
43.00 3.50 2.84 0.00 96.00 3.50 2.84 0.00
44.00 3.50 2.84 0.00 97.00 3.50 2.84 0.00
45.00 3.50 2.84 0.00 98.00 3.50 2.84 0.00
46.00 3.50 2.84 0.00 99.00 3.50 2.84 0.00
47.00 3.50 2.84 0.00 100.00 3.50 2.84 0.00
48.00 3.50 2.84 0.00 101.00 3.50 2.84 0.00
49.00 3.50 2.84 0.00 102.00 3.50 2.84 0.00
50.00 3.50 2.84 0.00 103.00 3.50 2.84 0.00
51.00 3.50 2.84 0.00 104.00 3.50 2.84 0.00
52.00 3.50 2.84 0.00 105.00 3.50 2.84 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 32
Hydrograph for Subcatchment 4S: POST- B (BYPASSED) (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 3.50 2.84 0.00
107.00 3.50 2.84 0.00
108.00 3.50 2.84 0.00
109.00 3.50 2.84 0.00
110.00 3.50 2.84 0.00
111.00 3.50 2.84 0.00
112.00 3.50 2.84 0.00
113.00 3.50 2.84 0.00
114.00 3.50 2.84 0.00
115.00 3.50 2.84 0.00
116.00 3.50 2.84 0.00
117.00 3.50 2.84 0.00
118.00 3.50 2.84 0.00
119.00 3.50 2.84 0.00
120.00 3.50 2.84 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 33
Summary for Pond 3P: BMP A
Inflow Area = 2.742 ac, 61.05% Impervious, Inflow Depth = 1.78" for 10-Year event
Inflow = 12.61 cfs @ 2.96 hrs, Volume= 0.407 af
Outflow = 1.12 cfs @ 3.50 hrs, Volume= 0.407 af, Atten= 91%, Lag= 32.3 min
Primary = 1.12 cfs @ 3.50 hrs, Volume= 0.407 af
Routed to Link 5L : OUTFALL
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routed to Link 5L : OUTFALL
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 845.37' @ 3.50 hrs Surf.Area= 4,009 sf Storage= 10,745 cf
Plug-Flow detention time= 566.6 min calculated for 0.407 af(100% of inflow)
Center-of-Mass det. time= 568.4 min ( 773.5 - 205.2 )
Volume Invert Avail.Storage Storage Description
#1 841.50' 23,424 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
841.50 500 0 0
842.00 1,858 590 590
843.00 2,667 2,263 2,852
844.00 3,227 2,947 5,799
845.00 3,789 3,508 9,307
846.00 4,386 4,088 13,395
847.00 5,017 4,702 18,096
848.00 5,638 5,328 23,424
Device Routing Invert Outlet Devices
#1 Primary 839.33' 18.0" Round Culvert
L= 47.5' Box, headwall w/3 rounded edges, Ke= 0.200
Inlet/Outlet Invert= 839.33' /838.39' S= 0.0198 '/' Cc= 0.900
n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf
#2 Device 1 841.50' Special & User-Defined
Head (feet) 0.00 1.00 2.00 3.00 4.00 5.00
Disch. (cfs) 0.000 0.029 0.039 0.048 0.058 0.068
#3 Device 1 843.86' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#4 Secondary 847.60' 10.0' long x 10.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64
Primary OutFlow Max=1.12 cfs @ 3.50 hrs HW=845.37' (Free Discharge)
4-1=Culvert (Passes 1.12 cfs of 23.83 cfs potential flow)
'2=Special & User-Defined (Custom Controls 0.06 cfs)
3=Orifice/Grate (Orifice Controls 1.06 cfs @ 5.40 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=841.50' (Free Discharge)
L4=Broad-Crested Rectangular Weir( Controls 0.00 cfs)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 34
Pond 3P: BMP A
Hydrograph
A I 1 -r 1 1 1 1 1rt l
■Inflow
12.61 cfs ■outflow
147-./ , 11 IfIV __I,,__ 4L.'/ �ja�� ■Se ondary
13. Pid! / I i 1 y845.a-E' —
12
11 11 r - St0ta A -45l cf
10- -II - 1 -k ]- 4 -I 1- 14 I-1 4 1 -
9
w 8� 1 _ L1 _L L _ 1 1 i i L1i U1i _
1 6i/ / I -r t- -r I rt - 1- 1 rt 1-1 -r —
4/
1 1 r-f1 % I 1 1 1 J J
1.12 cfs
I
0.00 cfs /,///�1 (l/ , ////�, /, �,///ll
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 35
Hydrograph for Pond 3P: BMP A
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
0.00 0.00 0 841.50 0.00 0.00 0.00
1.00 0.00 0 841.50 0.00 0.00 0.00
2.00 0.00 0 841.50 0.00 0.00 0.00
3.00 11.20 7,853 844.60 0.71 0.71 0.00
4.00 0.71 10,305 845.26 1.07 1.07 0.00
5.00 0.43 8,773 844.86 0.87 0.87 0.00
6.00 0.34 7,453 844.49 0.63 0.63 0.00
7.00 0.00 6,107 844.09 0.19 0.19 0.00
8.00 0.00 5,677 843.96 0.08 0.08 0.00
9.00 0.00 5,464 843.90 0.05 0.05 0.00
10.00 0.00 5,306 843.85 0.04 0.04 0.00
11.00 0.00 5,155 843.80 0.04 0.04 0.00
12.00 0.00 5,006 843.75 0.04 0.04 0.00
13.00 0.00 4,858 843.70 0.04 0.04 0.00
14.00 0.00 4,712 843.65 0.04 0.04 0.00
15.00 0.00 4,568 843.60 0.04 0.04 0.00
16.00 0.00 4,425 843.56 0.04 0.04 0.00
17.00 0.00 4,283 843.51 0.04 0.04 0.00
18.00 0.00 4,143 843.46 0.04 0.04 0.00
19.00 0.00 4,005 843.41 0.04 0.04 0.00
20.00 0.00 3,869 843.37 0.04 0.04 0.00
21.00 0.00 3,734 843.32 0.04 0.04 0.00
22.00 0.00 3,601 843.27 0.04 0.04 0.00
23.00 0.00 3,469 843.23 0.04 0.04 0.00
24.00 0.00 3,340 843.18 0.04 0.04 0.00
25.00 0.00 3,212 843.13 0.04 0.04 0.00
26.00 0.00 3,085 843.09 0.03 0.03 0.00
27.00 0.00 2,961 843.04 0.03 0.03 0.00
28.00 0.00 2,838 842.99 0.03 0.03 0.00
29.00 0.00 2,716 842.95 0.03 0.03 0.00
30.00 0.00 2,596 842.90 0.03 0.03 0.00
31.00 0.00 2,478 842.86 0.03 0.03 0.00
32.00 0.00 2,362 842.81 0.03 0.03 0.00
33.00 0.00 2,247 842.76 0.03 0.03 0.00
34.00 0.00 2,134 842.72 0.03 0.03 0.00
35.00 0.00 2,023 842.67 0.03 0.03 0.00
36.00 0.00 1,913 842.63 0.03 0.03 0.00
37.00 0.00 1,805 842.58 0.03 0.03 0.00
38.00 0.00 1,698 842.53 0.03 0.03 0.00
39.00 0.00 1,594 842.49 0.03 0.03 0.00
40.00 0.00 1,493 842.44 0.03 0.03 0.00
41.00 0.00 1,397 842.40 0.03 0.03 0.00
42.00 0.00 1,305 842.36 0.02 0.02 0.00
43.00 0.00 1,218 842.32 0.02 0.02 0.00
44.00 0.00 1,134 842.28 0.02 0.02 0.00
45.00 0.00 1,055 842.24 0.02 0.02 0.00
46.00 0.00 980 842.20 0.02 0.02 0.00
47.00 0.00 909 842.17 0.02 0.02 0.00
48.00 0.00 841 842.13 0.02 0.02 0.00
49.00 0.00 777 842.10 0.02 0.02 0.00
50.00 0.00 716 842.07 0.02 0.02 0.00
51.00 0.00 659 842.04 0.02 0.02 0.00
52.00 0.00 604 842.01 0.01 0.01 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 36
Hydrograph for Pond 3P: BMP A (continued)
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
53.00 0.00 553 841.98 0.01 0.01 0.00
54.00 0.00 504 841.95 0.01 0.01 0.00
55.00 0.00 458 841.92 0.01 0.01 0.00
56.00 0.00 415 841.90 0.01 0.01 0.00
57.00 0.00 375 841.87 0.01 0.01 0.00
58.00 0.00 338 841.85 0.01 0.01 0.00
59.00 0.00 303 841.82 0.01 0.01 0.00
60.00 0.00 270 841.80 0.01 0.01 0.00
61.00 0.00 240 841.77 0.01 0.01 0.00
62.00 0.00 213 841.75 0.01 0.01 0.00
63.00 0.00 188 841.73 0.01 0.01 0.00
64.00 0.00 165 841.71 0.01 0.01 0.00
65.00 0.00 144 841.69 0.01 0.01 0.00
66.00 0.00 125 841.67 0.00 0.00 0.00
67.00 0.00 109 841.65 0.00 0.00 0.00
68.00 0.00 94 841.64 0.00 0.00 0.00
69.00 0.00 80 841.62 0.00 0.00 0.00
70.00 0.00 68 841.60 0.00 0.00 0.00
71.00 0.00 58 841.59 0.00 0.00 0.00
72.00 0.00 49 841.58 0.00 0.00 0.00
73.00 0.00 42 841.57 0.00 0.00 0.00
74.00 0.00 35 841.56 0.00 0.00 0.00
75.00 0.00 29 841.55 0.00 0.00 0.00
76.00 0.00 24 841.54 0.00 0.00 0.00
77.00 0.00 20 841.53 0.00 0.00 0.00
78.00 0.00 17 841.53 0.00 0.00 0.00
79.00 0.00 14 841.52 0.00 0.00 0.00
80.00 0.00 12 841.52 0.00 0.00 0.00
81.00 0.00 10 841.52 0.00 0.00 0.00
82.00 0.00 8 841.51 0.00 0.00 0.00
83.00 0.00 7 841.51 0.00 0.00 0.00
84.00 0.00 6 841.51 0.00 0.00 0.00
85.00 0.00 5 841.51 0.00 0.00 0.00
86.00 0.00 4 841.51 0.00 0.00 0.00
87.00 0.00 3 841.51 0.00 0.00 0.00
88.00 0.00 3 841.50 0.00 0.00 0.00
89.00 0.00 2 841.50 0.00 0.00 0.00
90.00 0.00 2 841.50 0.00 0.00 0.00
91.00 0.00 2 841.50 0.00 0.00 0.00
92.00 0.00 1 841.50 0.00 0.00 0.00
93.00 0.00 1 841.50 0.00 0.00 0.00
94.00 0.00 1 841.50 0.00 0.00 0.00
95.00 0.00 1 841.50 0.00 0.00 0.00
96.00 0.00 1 841.50 0.00 0.00 0.00
97.00 0.00 1 841.50 0.00 0.00 0.00
98.00 0.00 0 841.50 0.00 0.00 0.00
99.00 0.00 0 841.50 0.00 0.00 0.00
100.00 0.00 0 841.50 0.00 0.00 0.00
101.00 0.00 0 841.50 0.00 0.00 0.00
102.00 0.00 0 841.50 0.00 0.00 0.00
103.00 0.00 0 841.50 0.00 0.00 0.00
104.00 0.00 0 841.50 0.00 0.00 0.00
105.00 0.00 0 841.50 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 37
Hydrograph for Pond 3P: BMP A (continued)
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
106.00 0.00 0 841.50 0.00 0.00 0.00
107.00 0.00 0 841.50 0.00 0.00 0.00
108.00 0.00 0 841.50 0.00 0.00 0.00
109.00 0.00 0 841.50 0.00 0.00 0.00
110.00 0.00 0 841.50 0.00 0.00 0.00
111.00 0.00 0 841.50 0.00 0.00 0.00
112.00 0.00 0 841.50 0.00 0.00 0.00
113.00 0.00 0 841.50 0.00 0.00 0.00
114.00 0.00 0 841.50 0.00 0.00 0.00
115.00 0.00 0 841.50 0.00 0.00 0.00
116.00 0.00 0 841.50 0.00 0.00 0.00
117.00 0.00 0 841.50 0.00 0.00 0.00
118.00 0.00 0 841.50 0.00 0.00 0.00
119.00 0.00 0 841.50 0.00 0.00 0.00
120.00 0.00 0 841.50 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 38
Stage-Discharge for Pond 3P: BMP A
Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs)
841.50 0.00 0.00 0.00 846.80 1.62 1.62 0.00
841.60 0.00 0.00 0.00 846.90 1.65 1.65 0.00
841.70 0.01 0.01 0.00 847.00 1.68 1.68 0.00
841.80 0.01 0.01 0.00 847.10 1.70 1.70 0.00
841.90 0.01 0.01 0.00 847.20 1.73 1.73 0.00
842.00 0.01 0.01 0.00 847.30 1.76 1.76 0.00
842.10 0.02 0.02 0.00 847.40 1.78 1.78 0.00
842.20 0.02 0.02 0.00 847.50 1.81 1.81 0.00
842.30 0.02 0.02 0.00 847.60 1.83 1.83 0.00
842.40 0.03 0.03 0.00 847.70 2.65 1.86 0.79
842.50 0.03 0.03 0.00 847.80 4.11 1.88 2.23
842.60 0.03 0.03 0.00 847.90 6.06 1.91 4.15
842.70 0.03 0.03 0.00 848.00 8.41 1.93 6.48
842.80 0.03 0.03 0.00
842.90 0.03 0.03 0.00
843.00 0.03 0.03 0.00
843.10 0.04 0.04 0.00
843.20 0.04 0.04 0.00
843.30 0.04 0.04 0.00
843.40 0.04 0.04 0.00
843.50 0.04 0.04 0.00
843.60 0.04 0.04 0.00
843.70 0.04 0.04 0.00
843.80 0.04 0.04 0.00
843.90 0.05 0.05 0.00
844.00 0.10 0.10 0.00
844.10 0.20 0.20 0.00
844.20 0.33 0.33 0.00
844.30 0.46 0.46 0.00
844.40 0.56 0.56 0.00
844.50 0.64 0.64 0.00
844.60 0.71 0.71 0.00
844.70 0.78 0.78 0.00
844.80 0.84 0.84 0.00
844.90 0.89 0.89 0.00
845.00 0.94 0.94 0.00
845.10 0.99 0.99 0.00
845.20 1.04 1.04 0.00
845.30 1.09 1.09 0.00
845.40 1.13 1.13 0.00
845.50 1.17 1.17 0.00
845.60 1.21 1.21 0.00
845.70 1.25 1.25 0.00
845.80 1.29 1.29 0.00
845.90 1.33 1.33 0.00
846.00 1.36 1.36 0.00
846.10 1.40 1.40 0.00
846.20 1.43 1.43 0.00
846.30 1.47 1.47 0.00
846.40 1.50 1.50 0.00
846.50 1.53 1.53 0.00
846.60 1.56 1.56 0.00
846.70 1.59 1.59 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 39
Stage-Area-Storage for Pond 3P: BMP A
Elevation Surface Storage Elevation Surface Storage
(feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet)
841.50 500 0 846.80 4,891 17,105
841.60 772 64 846.90 4,954 17,597
841.70 1,043 154 847.00 5,017 18,096
841.80 1,315 272 847.10 5,079 18,601
841.90 1,586 417 847.20 5,141 19,112
842.00 1,858 590 847.30 5,203 19,629
842.10 1,939 779 847.40 5,265 20,152
842.20 2,020 977 847.50 5,328 20,682
842.30 2,101 1,183 847.60 5,390 21,218
842.40 2,182 1,397 847.70 5,452 21,760
842.50 2,263 1,620 847.80 5,514 22,308
842.60 2,343 1,850 847.90 5,576 22,863
842.70 2,424 2,088 848.00 5,638 23,424
842.80 2,505 2,335
842.90 2,586 2,589
843.00 2,667 2,852
843.10 2,723 3,122
843.20 2,779 3,397
843.30 2,835 3,677
843.40 2,891 3,964
843.50 2,947 4,256
843.60 3,003 4,553
843.70 3,059 4,856
843.80 3,115 5,165
843.90 3,171 5,479
844.00 3,227 5,799
844.10 3,283 6,125
844.20 3,339 6,456
844.30 3,396 6,792
844.40 3,452 7,135
844.50 3,508 7,483
844.60 3,564 7,836
844.70 3,620 8,196
844.80 3,677 8,560
844.90 3,733 8,931
845.00 3,789 9,307
845.10 3,849 9,689
845.20 3,908 10,077
845.30 3,968 10,471
845.40 4,028 10,870
845.50 4,088 11,276
845.60 4,147 11,688
845.70 4,207 12,106
845.80 4,267 12,529
845.90 4,326 12,959
846.00 4,386 13,395
846.10 4,449 13,836
846.20 4,512 14,284
846.30 4,575 14,739
846.40 4,638 15,199
846.50 4,702 15,666
846.60 4,765 16,140
846.70 4,828 16,619

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 40
Summary for Link 5L: OUTFALL
Inflow Area = 3.310 ac, 65.92% Impervious, Inflow Depth = 1.96" for 10-Year event
Inflow = 4.05 cfs @ 2.98 hrs, Volume= 0.542 af
Primary = 4.05 cfs @ 2.98 hrs, Volume= 0.542 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 5L: OUTFALL
Hydrograph
mom
❑Inflow `
❑Primary)
4.05 cfs Inflow Area=3.310 ac
4
3
LL 2 I°
1
01
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 41
Hydrograph for Link 5L: OUTFALL
Time Inflow Elevation Primary Time Inflow Elevation Primary
(hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs)
0.00 0.00 0.00 0.00 53.00 0.01 0.00 0.01
1.00 0.01 0.00 0.01 54.00 0.01 0.00 0.01
2.00 0.10 0.00 0.10 55.00 0.01 0.00 0.01
3.00 3.90 0.00 3.90 56.00 0.01 0.00 0.01
4.00 1.25 0.00 1.25 57.00 0.01 0.00 0.01
5.00 0.98 0.00 0.98 58.00 0.01 0.00 0.01
6.00 0.72 0.00 0.72 59.00 0.01 0.00 0.01
7.00 0.19 0.00 0.19 60.00 0.01 0.00 0.01
8.00 0.08 0.00 0.08 61.00 0.01 0.00 0.01
9.00 0.05 0.00 0.05 62.00 0.01 0.00 0.01
10.00 0.04 0.00 0.04 63.00 0.01 0.00 0.01
11.00 0.04 0.00 0.04 64.00 0.01 0.00 0.01
12.00 0.04 0.00 0.04 65.00 0.01 0.00 0.01
13.00 0.04 0.00 0.04 66.00 0.00 0.00 0.00
14.00 0.04 0.00 0.04 67.00 0.00 0.00 0.00
15.00 0.04 0.00 0.04 68.00 0.00 0.00 0.00
16.00 0.04 0.00 0.04 69.00 0.00 0.00 0.00
17.00 0.04 0.00 0.04 70.00 0.00 0.00 0.00
18.00 0.04 0.00 0.04 71.00 0.00 0.00 0.00
19.00 0.04 0.00 0.04 72.00 0.00 0.00 0.00
20.00 0.04 0.00 0.04 73.00 0.00 0.00 0.00
21.00 0.04 0.00 0.04 74.00 0.00 0.00 0.00
22.00 0.04 0.00 0.04 75.00 0.00 0.00 0.00
23.00 0.04 0.00 0.04 76.00 0.00 0.00 0.00
24.00 0.04 0.00 0.04 77.00 0.00 0.00 0.00
25.00 0.04 0.00 0.04 78.00 0.00 0.00 0.00
26.00 0.03 0.00 0.03 79.00 0.00 0.00 0.00
27.00 0.03 0.00 0.03 80.00 0.00 0.00 0.00
28.00 0.03 0.00 0.03 81.00 0.00 0.00 0.00
29.00 0.03 0.00 0.03 82.00 0.00 0.00 0.00
30.00 0.03 0.00 0.03 83.00 0.00 0.00 0.00
31.00 0.03 0.00 0.03 84.00 0.00 0.00 0.00
32.00 0.03 0.00 0.03 85.00 0.00 0.00 0.00
33.00 0.03 0.00 0.03 86.00 0.00 0.00 0.00
34.00 0.03 0.00 0.03 87.00 0.00 0.00 0.00
35.00 0.03 0.00 0.03 88.00 0.00 0.00 0.00
36.00 0.03 0.00 0.03 89.00 0.00 0.00 0.00
37.00 0.03 0.00 0.03 90.00 0.00 0.00 0.00
38.00 0.03 0.00 0.03 91.00 0.00 0.00 0.00
39.00 0.03 0.00 0.03 92.00 0.00 0.00 0.00
40.00 0.03 0.00 0.03 93.00 0.00 0.00 0.00
41.00 0.03 0.00 0.03 94.00 0.00 0.00 0.00
42.00 0.02 0.00 0.02 95.00 0.00 0.00 0.00
43.00 0.02 0.00 0.02 96.00 0.00 0.00 0.00
44.00 0.02 0.00 0.02 97.00 0.00 0.00 0.00
45.00 0.02 0.00 0.02 98.00 0.00 0.00 0.00
46.00 0.02 0.00 0.02 99.00 0.00 0.00 0.00
47.00 0.02 0.00 0.02 100.00 0.00 0.00 0.00
48.00 0.02 0.00 0.02 101.00 0.00 0.00 0.00
49.00 0.02 0.00 0.02 102.00 0.00 0.00 0.00
50.00 0.02 0.00 0.02 103.00 0.00 0.00 0.00
51.00 0.02 0.00 0.02 104.00 0.00 0.00 0.00
52.00 0.01 0.00 0.01 105.00 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 10-Year Rainfall=3.50"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 42
Hydrograph for Link 5L: OUTFALL (continued)
Time Inflow Elevation Primary
(hours) (cfs) (feet) (cfs)
106.00 0.00 0.00 0.00
107.00 0.00 0.00 0.00
108.00 0.00 0.00 0.00
109.00 0.00 0.00 0.00
110.00 0.00 0.00 0.00
111.00 0.00 0.00 0.00
112.00 0.00 0.00 0.00
113.00 0.00 0.00 0.00
114.00 0.00 0.00 0.00
115.00 0.00 0.00 0.00
116.00 0.00 0.00 0.00
117.00 0.00 0.00 0.00
118.00 0.00 0.00 0.00
119.00 0.00 0.00 0.00
120.00 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 43
Time span=0.00-120.00 hrs, dt=0.05 hrs, 2401 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment 1 S: PRE Runoff Area=1.630 ac 57.30% Impervious Runoff Depth=2.70"
Tc=5.0 min CN=81 Runoff=11.22 cfs 0.367 af
Subcatchment2S: POST- A(ROUTED) Runoff Area=119,449 sf 61.05% Impervious Runoff Depth=2.79"
Tc=5.0 min CN=82 Runoff=19.42 cfs 0.639 af
Subcatchment4S: POST-B (BYPASSED) Runoff Area=0.568 ac 89.44% Impervious Runoff Depth=3.99"
Tc=5.0 min CN=94 Runoff=5.20 cfs 0.189 af
Pond 3P: BMP A Peak Elev=846.84' Storage=17,311 cf Inflow=19.42 cfs 0.639 af
Primary=1.63 cfs 0.639 af Secondary=0.00 cfs 0.000 af Outflow=1.63 cfs 0.639 af
Link 5L: OUTFALL Inflow=6.28 cfs 0.828 af
Primary=6.28 cfs 0.828 af
Total Runoff Area = 4.940 ac Runoff Volume = 1.195 af Average Runoff Depth = 2.90"
36.92% Pervious = 1.824 ac 63.08% Impervious = 3.116 ac

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 44
Summary for Subcatchment 1S: PRE
Runoff = 11.22 cfs @ 2.96 hrs, Volume= 0.367 af, Depth= 2.70"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 6-hr 50-Year Rainfall=4.68"
Area (ac) CN Description
0.934 98 Paved parking, HSG B
0.696 58 Woods/grass comb., Good, HSG B
1.630 81 Weighted Average
0.696 42.70% Pervious Area
0.934 57.30% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 1 S: PRE
Hydrograph
i i9 —1 - - L - I - ■Runoff
11.22 cfs
11= Y Ty�e�l
10- / � r
504Yearr RairhfaIl$4.687
$=/ R n Are 1 630 ac _
o 7 Q f 1V I4me . 6 _f -
° 6-�/ Runoff Dep h . _" -
5-'
Tc-5.- '' -
4 st-N68"1
2=
a- �lil/lil/lil/lll/lil/lil/lil/lll/lil/lil/llrlillllilrlil/lil/lilllilrlil�lil/lll/iiiiiiii�e�
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 45
Hydrograph for Subcatchment 1S: PRE
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 4.68 2.70 0.00
1.00 0.23 0.00 0.00 54.00 4.68 2.70 0.00
2.00 0.58 0.01 0.05 55.00 4.68 2.70 0.00
3.00 3.42 1.64 9.83 56.00 4.68 2.70 0.00
4.00 4.14 2.24 0.60 57.00 4.68 2.70 0.00
5.00 4.46 2.51 0.36 58.00 4.68 2.70 0.00
6.00 4.68 2.70 0.29 59.00 4.68 2.70 0.00
7.00 4.68 2.70 0.00 60.00 4.68 2.70 0.00
8.00 4.68 2.70 0.00 61.00 4.68 2.70 0.00
9.00 4.68 2.70 0.00 62.00 4.68 2.70 0.00
10.00 4.68 2.70 0.00 63.00 4.68 2.70 0.00
11.00 4.68 2.70 0.00 64.00 4.68 2.70 0.00
12.00 4.68 2.70 0.00 65.00 4.68 2.70 0.00
13.00 4.68 2.70 0.00 66.00 4.68 2.70 0.00
14.00 4.68 2.70 0.00 67.00 4.68 2.70 0.00
15.00 4.68 2.70 0.00 68.00 4.68 2.70 0.00
16.00 4.68 2.70 0.00 69.00 4.68 2.70 0.00
17.00 4.68 2.70 0.00 70.00 4.68 2.70 0.00
18.00 4.68 2.70 0.00 71.00 4.68 2.70 0.00
19.00 4.68 2.70 0.00 72.00 4.68 2.70 0.00
20.00 4.68 2.70 0.00 73.00 4.68 2.70 0.00
21.00 4.68 2.70 0.00 74.00 4.68 2.70 0.00
22.00 4.68 2.70 0.00 75.00 4.68 2.70 0.00
23.00 4.68 2.70 0.00 76.00 4.68 2.70 0.00
24.00 4.68 2.70 0.00 77.00 4.68 2.70 0.00
25.00 4.68 2.70 0.00 78.00 4.68 2.70 0.00
26.00 4.68 2.70 0.00 79.00 4.68 2.70 0.00
27.00 4.68 2.70 0.00 80.00 4.68 2.70 0.00
28.00 4.68 2.70 0.00 81.00 4.68 2.70 0.00
29.00 4.68 2.70 0.00 82.00 4.68 2.70 0.00
30.00 4.68 2.70 0.00 83.00 4.68 2.70 0.00
31.00 4.68 2.70 0.00 84.00 4.68 2.70 0.00
32.00 4.68 2.70 0.00 85.00 4.68 2.70 0.00
33.00 4.68 2.70 0.00 86.00 4.68 2.70 0.00
34.00 4.68 2.70 0.00 87.00 4.68 2.70 0.00
35.00 4.68 2.70 0.00 88.00 4.68 2.70 0.00
36.00 4.68 2.70 0.00 89.00 4.68 2.70 0.00
37.00 4.68 2.70 0.00 90.00 4.68 2.70 0.00
38.00 4.68 2.70 0.00 91.00 4.68 2.70 0.00
39.00 4.68 2.70 0.00 92.00 4.68 2.70 0.00
40.00 4.68 2.70 0.00 93.00 4.68 2.70 0.00
41.00 4.68 2.70 0.00 94.00 4.68 2.70 0.00
42.00 4.68 2.70 0.00 95.00 4.68 2.70 0.00
43.00 4.68 2.70 0.00 96.00 4.68 2.70 0.00
44.00 4.68 2.70 0.00 97.00 4.68 2.70 0.00
45.00 4.68 2.70 0.00 98.00 4.68 2.70 0.00
46.00 4.68 2.70 0.00 99.00 4.68 2.70 0.00
47.00 4.68 2.70 0.00 100.00 4.68 2.70 0.00
48.00 4.68 2.70 0.00 101.00 4.68 2.70 0.00
49.00 4.68 2.70 0.00 102.00 4.68 2.70 0.00
50.00 4.68 2.70 0.00 103.00 4.68 2.70 0.00
51.00 4.68 2.70 0.00 104.00 4.68 2.70 0.00
52.00 4.68 2.70 0.00 105.00 4.68 2.70 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 46
Hydrograph for Subcatchment 1S: PRE (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 4.68 2.70 0.00
107.00 4.68 2.70 0.00
108.00 4.68 2.70 0.00
109.00 4.68 2.70 0.00
110.00 4.68 2.70 0.00
111.00 4.68 2.70 0.00
112.00 4.68 2.70 0.00
113.00 4.68 2.70 0.00
114.00 4.68 2.70 0.00
115.00 4.68 2.70 0.00
116.00 4.68 2.70 0.00
117.00 4.68 2.70 0.00
118.00 4.68 2.70 0.00
119.00 4.68 2.70 0.00
120.00 4.68 2.70 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 47
Summary for Subcatchment 2S: POST - A (ROUTED)
Runoff = 19.42 cfs @ 2.96 hrs, Volume= 0.639 af, Depth= 2.79"
Routed to Pond 3P : BMP A
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 6-hr 50-Year Rainfall=4.68"
Area (sf) CN Description
72,929 98 Paved parking, HSG B
46,520 58 Woods/grass comb., Good, HSG B
119,449 82 Weighted Average
46,520 38.95% Pervious Area
72,929 61.05% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 2S: POST - A (ROUTED)
Hydrograph
t ■Runoff
19.42 cfs Y H 1— 1 H -- I- H191 -YP e�i
18_'
7_ ,/ I I fi I t H- 1- I Er -
15= zH 5O4Yea LRefhfill 4.68" -
14
13= 41R_Rn° rela�19, f
12-
11; H + H -H H- HRa V I me7.�3 f =
° 10''/ noff De . " -
LL
8 t c 5 A nii-n
-
5
3- - I I H- H- I
2 -4
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 48
Hydrograph for Subcatchment 2S: POST - A (ROUTED)
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 4.68 2.79 0.00
1.00 0.23 0.00 0.00 54.00 4.68 2.79 0.00
2.00 0.58 0.01 0.12 55.00 4.68 2.79 0.00
3.00 3.42 1.72 16.95 56.00 4.68 2.79 0.00
4.00 4.14 2.32 1.02 57.00 4.68 2.79 0.00
5.00 4.46 2.60 0.62 58.00 4.68 2.79 0.00
6.00 4.68 2.79 0.49 59.00 4.68 2.79 0.00
7.00 4.68 2.79 0.00 60.00 4.68 2.79 0.00
8.00 4.68 2.79 0.00 61.00 4.68 2.79 0.00
9.00 4.68 2.79 0.00 62.00 4.68 2.79 0.00
10.00 4.68 2.79 0.00 63.00 4.68 2.79 0.00
11.00 4.68 2.79 0.00 64.00 4.68 2.79 0.00
12.00 4.68 2.79 0.00 65.00 4.68 2.79 0.00
13.00 4.68 2.79 0.00 66.00 4.68 2.79 0.00
14.00 4.68 2.79 0.00 67.00 4.68 2.79 0.00
15.00 4.68 2.79 0.00 68.00 4.68 2.79 0.00
16.00 4.68 2.79 0.00 69.00 4.68 2.79 0.00
17.00 4.68 2.79 0.00 70.00 4.68 2.79 0.00
18.00 4.68 2.79 0.00 71.00 4.68 2.79 0.00
19.00 4.68 2.79 0.00 72.00 4.68 2.79 0.00
20.00 4.68 2.79 0.00 73.00 4.68 2.79 0.00
21.00 4.68 2.79 0.00 74.00 4.68 2.79 0.00
22.00 4.68 2.79 0.00 75.00 4.68 2.79 0.00
23.00 4.68 2.79 0.00 76.00 4.68 2.79 0.00
24.00 4.68 2.79 0.00 77.00 4.68 2.79 0.00
25.00 4.68 2.79 0.00 78.00 4.68 2.79 0.00
26.00 4.68 2.79 0.00 79.00 4.68 2.79 0.00
27.00 4.68 2.79 0.00 80.00 4.68 2.79 0.00
28.00 4.68 2.79 0.00 81.00 4.68 2.79 0.00
29.00 4.68 2.79 0.00 82.00 4.68 2.79 0.00
30.00 4.68 2.79 0.00 83.00 4.68 2.79 0.00
31.00 4.68 2.79 0.00 84.00 4.68 2.79 0.00
32.00 4.68 2.79 0.00 85.00 4.68 2.79 0.00
33.00 4.68 2.79 0.00 86.00 4.68 2.79 0.00
34.00 4.68 2.79 0.00 87.00 4.68 2.79 0.00
35.00 4.68 2.79 0.00 88.00 4.68 2.79 0.00
36.00 4.68 2.79 0.00 89.00 4.68 2.79 0.00
37.00 4.68 2.79 0.00 90.00 4.68 2.79 0.00
38.00 4.68 2.79 0.00 91.00 4.68 2.79 0.00
39.00 4.68 2.79 0.00 92.00 4.68 2.79 0.00
40.00 4.68 2.79 0.00 93.00 4.68 2.79 0.00
41.00 4.68 2.79 0.00 94.00 4.68 2.79 0.00
42.00 4.68 2.79 0.00 95.00 4.68 2.79 0.00
43.00 4.68 2.79 0.00 96.00 4.68 2.79 0.00
44.00 4.68 2.79 0.00 97.00 4.68 2.79 0.00
45.00 4.68 2.79 0.00 98.00 4.68 2.79 0.00
46.00 4.68 2.79 0.00 99.00 4.68 2.79 0.00
47.00 4.68 2.79 0.00 100.00 4.68 2.79 0.00
48.00 4.68 2.79 0.00 101.00 4.68 2.79 0.00
49.00 4.68 2.79 0.00 102.00 4.68 2.79 0.00
50.00 4.68 2.79 0.00 103.00 4.68 2.79 0.00
51.00 4.68 2.79 0.00 104.00 4.68 2.79 0.00
52.00 4.68 2.79 0.00 105.00 4.68 2.79 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 49
Hydrograph for Subcatchment 2S: POST - A (ROUTED) (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 4.68 2.79 0.00
107.00 4.68 2.79 0.00
108.00 4.68 2.79 0.00
109.00 4.68 2.79 0.00
110.00 4.68 2.79 0.00
111.00 4.68 2.79 0.00
112.00 4.68 2.79 0.00
113.00 4.68 2.79 0.00
114.00 4.68 2.79 0.00
115.00 4.68 2.79 0.00
116.00 4.68 2.79 0.00
117.00 4.68 2.79 0.00
118.00 4.68 2.79 0.00
119.00 4.68 2.79 0.00
120.00 4.68 2.79 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 50
Summary for Subcatchment 4S: POST- B (BYPASSED)
Runoff = 5.20 cfs @ 2.95 hrs, Volume= 0.189 af, Depth= 3.99"
Routed to Link 5L : OUTFALL
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 6-hr 50-Year Rainfall=4.68"
Area (ac) CN Description
0.508 98 Paved parking, HSG B
0.060 58 Woods/grass comb., Good, HSG B
0.568 94 Weighted Average
0.060 10.56% Pervious Area
0.508 89.44% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 4S: POST- B (BYPASSED)
Hydrograph
❑Runoff
5.20 cfs I
5 Typ�e�l
/ 6-hir
4 r 504Year Rainfall=4.68"
IRLncfff Area=0.568 ac
3
-IRL,!nipffVQ ume O 'C8f
. 9
LL / Runoff Depth=3.99
Tc=5.0A1r
2
GN94
1 /
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 51
Hydrograph for Subcatchment 4S: POST- B (BYPASSED)
Time Precip. Excess Runoff Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00 53.00 4.68 3.99 0.00
1.00 0.23 0.01 0.03 54.00 4.68 3.99 0.00
2.00 0.58 0.19 0.17 55.00 4.68 3.99 0.00
3.00 3.42 2.76 4.37 56.00 4.68 3.99 0.00
4.00 4.14 3.46 0.24 57.00 4.68 3.99 0.00
5.00 4.46 3.77 0.14 58.00 4.68 3.99 0.00
6.00 4.68 3.99 0.11 59.00 4.68 3.99 0.00
7.00 4.68 3.99 0.00 60.00 4.68 3.99 0.00
8.00 4.68 3.99 0.00 61.00 4.68 3.99 0.00
9.00 4.68 3.99 0.00 62.00 4.68 3.99 0.00
10.00 4.68 3.99 0.00 63.00 4.68 3.99 0.00
11.00 4.68 3.99 0.00 64.00 4.68 3.99 0.00
12.00 4.68 3.99 0.00 65.00 4.68 3.99 0.00
13.00 4.68 3.99 0.00 66.00 4.68 3.99 0.00
14.00 4.68 3.99 0.00 67.00 4.68 3.99 0.00
15.00 4.68 3.99 0.00 68.00 4.68 3.99 0.00
16.00 4.68 3.99 0.00 69.00 4.68 3.99 0.00
17.00 4.68 3.99 0.00 70.00 4.68 3.99 0.00
18.00 4.68 3.99 0.00 71.00 4.68 3.99 0.00
19.00 4.68 3.99 0.00 72.00 4.68 3.99 0.00
20.00 4.68 3.99 0.00 73.00 4.68 3.99 0.00
21.00 4.68 3.99 0.00 74.00 4.68 3.99 0.00
22.00 4.68 3.99 0.00 75.00 4.68 3.99 0.00
23.00 4.68 3.99 0.00 76.00 4.68 3.99 0.00
24.00 4.68 3.99 0.00 77.00 4.68 3.99 0.00
25.00 4.68 3.99 0.00 78.00 4.68 3.99 0.00
26.00 4.68 3.99 0.00 79.00 4.68 3.99 0.00
27.00 4.68 3.99 0.00 80.00 4.68 3.99 0.00
28.00 4.68 3.99 0.00 81.00 4.68 3.99 0.00
29.00 4.68 3.99 0.00 82.00 4.68 3.99 0.00
30.00 4.68 3.99 0.00 83.00 4.68 3.99 0.00
31.00 4.68 3.99 0.00 84.00 4.68 3.99 0.00
32.00 4.68 3.99 0.00 85.00 4.68 3.99 0.00
33.00 4.68 3.99 0.00 86.00 4.68 3.99 0.00
34.00 4.68 3.99 0.00 87.00 4.68 3.99 0.00
35.00 4.68 3.99 0.00 88.00 4.68 3.99 0.00
36.00 4.68 3.99 0.00 89.00 4.68 3.99 0.00
37.00 4.68 3.99 0.00 90.00 4.68 3.99 0.00
38.00 4.68 3.99 0.00 91.00 4.68 3.99 0.00
39.00 4.68 3.99 0.00 92.00 4.68 3.99 0.00
40.00 4.68 3.99 0.00 93.00 4.68 3.99 0.00
41.00 4.68 3.99 0.00 94.00 4.68 3.99 0.00
42.00 4.68 3.99 0.00 95.00 4.68 3.99 0.00
43.00 4.68 3.99 0.00 96.00 4.68 3.99 0.00
44.00 4.68 3.99 0.00 97.00 4.68 3.99 0.00
45.00 4.68 3.99 0.00 98.00 4.68 3.99 0.00
46.00 4.68 3.99 0.00 99.00 4.68 3.99 0.00
47.00 4.68 3.99 0.00 100.00 4.68 3.99 0.00
48.00 4.68 3.99 0.00 101.00 4.68 3.99 0.00
49.00 4.68 3.99 0.00 102.00 4.68 3.99 0.00
50.00 4.68 3.99 0.00 103.00 4.68 3.99 0.00
51.00 4.68 3.99 0.00 104.00 4.68 3.99 0.00
52.00 4.68 3.99 0.00 105.00 4.68 3.99 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 52
Hydrograph for Subcatchment 4S: POST- B (BYPASSED) (continued)
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
106.00 4.68 3.99 0.00
107.00 4.68 3.99 0.00
108.00 4.68 3.99 0.00
109.00 4.68 3.99 0.00
110.00 4.68 3.99 0.00
111.00 4.68 3.99 0.00
112.00 4.68 3.99 0.00
113.00 4.68 3.99 0.00
114.00 4.68 3.99 0.00
115.00 4.68 3.99 0.00
116.00 4.68 3.99 0.00
117.00 4.68 3.99 0.00
118.00 4.68 3.99 0.00
119.00 4.68 3.99 0.00
120.00 4.68 3.99 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 53
Summary for Pond 3P: BMP A
Inflow Area = 2.742 ac, 61.05% Impervious, Inflow Depth = 2.79" for 50-Year event
Inflow = 19.42 cfs @ 2.96 hrs, Volume= 0.639 af
Outflow = 1.63 cfs @ 3.50 hrs, Volume= 0.639 af, Atten= 92%, Lag= 32.4 min
Primary = 1.63 cfs @ 3.50 hrs, Volume= 0.639 af
Routed to Link 5L : OUTFALL
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routed to Link 5L : OUTFALL
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 846.84' @ 3.50 hrs Surf.Area= 4,917 sf Storage= 17,311 cf
Plug-Flow detention time= 425.2 min calculated for 0.639 af(100% of inflow)
Center-of-Mass det. time= 424.9 min ( 626.7 - 201.8 )
Volume Invert Avail.Storage Storage Description
#1 841.50' 23,424 cf Custom Stage Data (Prismatic)Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
841.50 500 0 0
842.00 1,858 590 590
843.00 2,667 2,263 2,852
844.00 3,227 2,947 5,799
845.00 3,789 3,508 9,307
846.00 4,386 4,088 13,395
847.00 5,017 4,702 18,096
848.00 5,638 5,328 23,424
Device Routing Invert Outlet Devices
#1 Primary 839.33' 18.0" Round Culvert
L= 47.5' Box, headwall w/3 rounded edges, Ke= 0.200
Inlet/Outlet Invert= 839.33' /838.39' S= 0.0198 '/' Cc= 0.900
n= 0.012 Concrete pipe, finished, Flow Area= 1.77 sf
#2 Device 1 841.50' Special & User-Defined
Head (feet) 0.00 1.00 2.00 3.00 4.00 5.00
Disch. (cfs) 0.000 0.029 0.039 0.048 0.058 0.068
#3 Device 1 843.86' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#4 Secondary 847.60' 10.0' long x 10.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64
Primary OutFlow Max=1.63 cfs @ 3.50 hrs HW=846.84' (Free Discharge)
4-1=Culvert (Passes 1.63 cfs of 26.84 cfs potential flow)
'2=Special & User-Defined (Custom Controls 0.07 cfs)
3=Orifice/Grate (Orifice Controls 1.56 cfs @ 7.96 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=841.50' (Free Discharge)
L4=Broad-Crested Rectangular Weir( Controls 0.00 cfs)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 54
Pond 3P: BMP A
Hydrograph
A —I I I Inflow
19.42 cfs f ` ,� _ L Outflowow
. f l"4ki." /42 IA4 ❑Secondary
PrimarY
201/ / I + I I - I H- H- H- PiaC Ele =84�6.M' -
194 /
18 / I 1 I Stow =1i73111-f -
16V /
151 / ItI H- 1 1 H 1 H 1 H- 1 1 H H H I H 1—I H-
14V /
y 13= /
124/ / I 1 I I I
3 11/ /
—
0 10_ -I * * 1 HI— —H—I ± H * I I I—I
LT. 947
84/ /
71/ / I 1 -1 ]— 4 1 1 -1 14 I-1 4 1 —
6< /
—
5; 1 Al rf I -
1 1.63cfs I -
0.0o
0 cfs / Z
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 55
Hydrograph for Pond 3P: BMP A
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
0.00 0.00 0 841.50 0.00 0.00 0.00
1.00 0.00 0 841.50 0.00 0.00 0.00
2.00 0.12 51 841.58 0.00 0.00 0.00
3.00 16.95 13,039 845.92 1.33 1.33 0.00
4.00 1.02 16,639 846.70 1.59 1.59 0.00
5.00 0.62 14,060 846.15 1.41 1.41 0.00
6.00 0.49 11,356 845.52 1.18 1.18 0.00
7.00 0.00 7,994 844.64 0.74 0.74 0.00
8.00 0.00 6,246 844.14 0.25 0.25 0.00
9.00 0.00 5,728 843.98 0.08 0.08 0.00
10.00 0.00 5,495 843.91 0.05 0.05 0.00
11.00 0.00 5,333 843.85 0.04 0.04 0.00
12.00 0.00 5,182 843.81 0.04 0.04 0.00
13.00 0.00 5,032 843.76 0.04 0.04 0.00
14.00 0.00 4,884 843.71 0.04 0.04 0.00
15.00 0.00 4,738 843.66 0.04 0.04 0.00
16.00 0.00 4,593 843.61 0.04 0.04 0.00
17.00 0.00 4,450 843.57 0.04 0.04 0.00
18.00 0.00 4,308 843.52 0.04 0.04 0.00
19.00 0.00 4,168 843.47 0.04 0.04 0.00
20.00 0.00 4,029 843.42 0.04 0.04 0.00
21.00 0.00 3,892 843.38 0.04 0.04 0.00
22.00 0.00 3,757 843.33 0.04 0.04 0.00
23.00 0.00 3,624 843.28 0.04 0.04 0.00
24.00 0.00 3,492 843.23 0.04 0.04 0.00
25.00 0.00 3,362 843.19 0.04 0.04 0.00
26.00 0.00 3,234 843.14 0.04 0.04 0.00
27.00 0.00 3,107 843.09 0.03 0.03 0.00
28.00 0.00 2,982 843.05 0.03 0.03 0.00
29.00 0.00 2,859 843.00 0.03 0.03 0.00
30.00 0.00 2,737 842.96 0.03 0.03 0.00
31.00 0.00 2,617 842.91 0.03 0.03 0.00
32.00 0.00 2,499 842.86 0.03 0.03 0.00
33.00 0.00 2,382 842.82 0.03 0.03 0.00
34.00 0.00 2,267 842.77 0.03 0.03 0.00
35.00 0.00 2,154 842.73 0.03 0.03 0.00
36.00 0.00 2,042 842.68 0.03 0.03 0.00
37.00 0.00 1,932 842.63 0.03 0.03 0.00
38.00 0.00 1,824 842.59 0.03 0.03 0.00
39.00 0.00 1,717 842.54 0.03 0.03 0.00
40.00 0.00 1,612 842.50 0.03 0.03 0.00
41.00 0.00 1,510 842.45 0.03 0.03 0.00
42.00 0.00 1,413 842.41 0.03 0.03 0.00
43.00 0.00 1,321 842.36 0.03 0.03 0.00
44.00 0.00 1,233 842.32 0.02 0.02 0.00
45.00 0.00 1,149 842.28 0.02 0.02 0.00
46.00 0.00 1,069 842.24 0.02 0.02 0.00
47.00 0.00 993 842.21 0.02 0.02 0.00
48.00 0.00 921 842.17 0.02 0.02 0.00
49.00 0.00 853 842.14 0.02 0.02 0.00
50.00 0.00 788 842.10 0.02 0.02 0.00
51.00 0.00 727 842.07 0.02 0.02 0.00
52.00 0.00 668 842.04 0.02 0.02 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 56
Hydrograph for Pond 3P: BMP A (continued)
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
53.00 0.00 613 842.01 0.01 0.01 0.00
54.00 0.00 561 841.98 0.01 0.01 0.00
55.00 0.00 512 841.96 0.01 0.01 0.00
56.00 0.00 466 841.93 0.01 0.01 0.00
57.00 0.00 423 841.90 0.01 0.01 0.00
58.00 0.00 382 841.88 0.01 0.01 0.00
59.00 0.00 344 841.85 0.01 0.01 0.00
60.00 0.00 309 841.83 0.01 0.01 0.00
61.00 0.00 276 841.80 0.01 0.01 0.00
62.00 0.00 246 841.78 0.01 0.01 0.00
63.00 0.00 218 841.76 0.01 0.01 0.00
64.00 0.00 192 841.73 0.01 0.01 0.00
65.00 0.00 169 841.71 0.01 0.01 0.00
66.00 0.00 148 841.69 0.01 0.01 0.00
67.00 0.00 128 841.67 0.01 0.01 0.00
68.00 0.00 111 841.65 0.00 0.00 0.00
69.00 0.00 96 841.64 0.00 0.00 0.00
70.00 0.00 82 841.62 0.00 0.00 0.00
71.00 0.00 70 841.61 0.00 0.00 0.00
72.00 0.00 60 841.59 0.00 0.00 0.00
73.00 0.00 51 841.58 0.00 0.00 0.00
74.00 0.00 43 841.57 0.00 0.00 0.00
75.00 0.00 36 841.56 0.00 0.00 0.00
76.00 0.00 30 841.55 0.00 0.00 0.00
77.00 0.00 25 841.54 0.00 0.00 0.00
78.00 0.00 21 841.54 0.00 0.00 0.00
79.00 0.00 18 841.53 0.00 0.00 0.00
80.00 0.00 15 841.53 0.00 0.00 0.00
81.00 0.00 12 841.52 0.00 0.00 0.00
82.00 0.00 10 841.52 0.00 0.00 0.00
83.00 0.00 9 841.51 0.00 0.00 0.00
84.00 0.00 7 841.51 0.00 0.00 0.00
85.00 0.00 6 841.51 0.00 0.00 0.00
86.00 0.00 5 841.51 0.00 0.00 0.00
87.00 0.00 4 841.51 0.00 0.00 0.00
88.00 0.00 4 841.51 0.00 0.00 0.00
89.00 0.00 3 841.51 0.00 0.00 0.00
90.00 0.00 3 841.50 0.00 0.00 0.00
91.00 0.00 2 841.50 0.00 0.00 0.00
92.00 0.00 2 841.50 0.00 0.00 0.00
93.00 0.00 1 841.50 0.00 0.00 0.00
94.00 0.00 1 841.50 0.00 0.00 0.00
95.00 0.00 1 841.50 0.00 0.00 0.00
96.00 0.00 1 841.50 0.00 0.00 0.00
97.00 0.00 1 841.50 0.00 0.00 0.00
98.00 0.00 1 841.50 0.00 0.00 0.00
99.00 0.00 1 841.50 0.00 0.00 0.00
100.00 0.00 0 841.50 0.00 0.00 0.00
101.00 0.00 0 841.50 0.00 0.00 0.00
102.00 0.00 0 841.50 0.00 0.00 0.00
103.00 0.00 0 841.50 0.00 0.00 0.00
104.00 0.00 0 841.50 0.00 0.00 0.00
105.00 0.00 0 841.50 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 57
Hydrograph for Pond 3P: BMP A (continued)
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs)
106.00 0.00 0 841.50 0.00 0.00 0.00
107.00 0.00 0 841.50 0.00 0.00 0.00
108.00 0.00 0 841.50 0.00 0.00 0.00
109.00 0.00 0 841.50 0.00 0.00 0.00
110.00 0.00 0 841.50 0.00 0.00 0.00
111.00 0.00 0 841.50 0.00 0.00 0.00
112.00 0.00 0 841.50 0.00 0.00 0.00
113.00 0.00 0 841.50 0.00 0.00 0.00
114.00 0.00 0 841.50 0.00 0.00 0.00
115.00 0.00 0 841.50 0.00 0.00 0.00
116.00 0.00 0 841.50 0.00 0.00 0.00
117.00 0.00 0 841.50 0.00 0.00 0.00
118.00 0.00 0 841.50 0.00 0.00 0.00
119.00 0.00 0 841.50 0.00 0.00 0.00
120.00 0.00 0 841.50 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 58
Stage-Discharge for Pond 3P: BMP A
Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs)
841.50 0.00 0.00 0.00 846.80 1.62 1.62 0.00
841.60 0.00 0.00 0.00 846.90 1.65 1.65 0.00
841.70 0.01 0.01 0.00 847.00 1.68 1.68 0.00
841.80 0.01 0.01 0.00 847.10 1.70 1.70 0.00
841.90 0.01 0.01 0.00 847.20 1.73 1.73 0.00
842.00 0.01 0.01 0.00 847.30 1.76 1.76 0.00
842.10 0.02 0.02 0.00 847.40 1.78 1.78 0.00
842.20 0.02 0.02 0.00 847.50 1.81 1.81 0.00
842.30 0.02 0.02 0.00 847.60 1.83 1.83 0.00
842.40 0.03 0.03 0.00 847.70 2.65 1.86 0.79
842.50 0.03 0.03 0.00 847.80 4.11 1.88 2.23
842.60 0.03 0.03 0.00 847.90 6.06 1.91 4.15
842.70 0.03 0.03 0.00 848.00 8.41 1.93 6.48
842.80 0.03 0.03 0.00
842.90 0.03 0.03 0.00
843.00 0.03 0.03 0.00
843.10 0.04 0.04 0.00
843.20 0.04 0.04 0.00
843.30 0.04 0.04 0.00
843.40 0.04 0.04 0.00
843.50 0.04 0.04 0.00
843.60 0.04 0.04 0.00
843.70 0.04 0.04 0.00
843.80 0.04 0.04 0.00
843.90 0.05 0.05 0.00
844.00 0.10 0.10 0.00
844.10 0.20 0.20 0.00
844.20 0.33 0.33 0.00
844.30 0.46 0.46 0.00
844.40 0.56 0.56 0.00
844.50 0.64 0.64 0.00
844.60 0.71 0.71 0.00
844.70 0.78 0.78 0.00
844.80 0.84 0.84 0.00
844.90 0.89 0.89 0.00
845.00 0.94 0.94 0.00
845.10 0.99 0.99 0.00
845.20 1.04 1.04 0.00
845.30 1.09 1.09 0.00
845.40 1.13 1.13 0.00
845.50 1.17 1.17 0.00
845.60 1.21 1.21 0.00
845.70 1.25 1.25 0.00
845.80 1.29 1.29 0.00
845.90 1.33 1.33 0.00
846.00 1.36 1.36 0.00
846.10 1.40 1.40 0.00
846.20 1.43 1.43 0.00
846.30 1.47 1.47 0.00
846.40 1.50 1.50 0.00
846.50 1.53 1.53 0.00
846.60 1.56 1.56 0.00
846.70 1.59 1.59 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 59
Stage-Area-Storage for Pond 3P: BMP A
Elevation Surface Storage Elevation Surface Storage
(feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet)
841.50 500 0 846.80 4,891 17,105
841.60 772 64 846.90 4,954 17,597
841.70 1,043 154 847.00 5,017 18,096
841.80 1,315 272 847.10 5,079 18,601
841.90 1,586 417 847.20 5,141 19,112
842.00 1,858 590 847.30 5,203 19,629
842.10 1,939 779 847.40 5,265 20,152
842.20 2,020 977 847.50 5,328 20,682
842.30 2,101 1,183 847.60 5,390 21,218
842.40 2,182 1,397 847.70 5,452 21,760
842.50 2,263 1,620 847.80 5,514 22,308
842.60 2,343 1,850 847.90 5,576 22,863
842.70 2,424 2,088 848.00 5,638 23,424
842.80 2,505 2,335
842.90 2,586 2,589
843.00 2,667 2,852
843.10 2,723 3,122
843.20 2,779 3,397
843.30 2,835 3,677
843.40 2,891 3,964
843.50 2,947 4,256
843.60 3,003 4,553
843.70 3,059 4,856
843.80 3,115 5,165
843.90 3,171 5,479
844.00 3,227 5,799
844.10 3,283 6,125
844.20 3,339 6,456
844.30 3,396 6,792
844.40 3,452 7,135
844.50 3,508 7,483
844.60 3,564 7,836
844.70 3,620 8,196
844.80 3,677 8,560
844.90 3,733 8,931
845.00 3,789 9,307
845.10 3,849 9,689
845.20 3,908 10,077
845.30 3,968 10,471
845.40 4,028 10,870
845.50 4,088 11,276
845.60 4,147 11,688
845.70 4,207 12,106
845.80 4,267 12,529
845.90 4,326 12,959
846.00 4,386 13,395
846.10 4,449 13,836
846.20 4,512 14,284
846.30 4,575 14,739
846.40 4,638 15,199
846.50 4,702 15,666
846.60 4,765 16,140
846.70 4,828 16,619

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 60
Summary for Link 5L: OUTFALL
Inflow Area = 3.310 ac, 65.92% Impervious, Inflow Depth = 3.00" for 50-Year event
Inflow = 6.28 cfs @ 2.96 hrs, Volume= 0.828 af
Primary = 6.28 cfs @ 2.96 hrs, Volume= 0.828 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 5L: OUTFALL
Hydrograph
1 7 1— I -1 F F I
❑Inflow `
R 7R rf ❑Primary
6.28 cfs VI4 I— 1 Inflow Area=3.310 ac
6_ 1 1 1 1 1 1 l
5- 1 1 1 1 1 1
kr 17 717 717 7 7 7 7 7 7 7 7 7 7
o 4
1- 14 1— I -1 4 4
o
0
" 3 I I I I I I I I
2 k/// I I I I I I 1
0 ,
1 P ,
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 61
Hydrograph for Link 5L: OUTFALL
Time Inflow Elevation Primary Time Inflow Elevation Primary
(hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs)
0.00 0.00 0.00 0.00 53.00 0.01 0.00 0.01
1.00 0.03 0.00 0.03 54.00 0.01 0.00 0.01
2.00 0.17 0.00 0.17 55.00 0.01 0.00 0.01
3.00 5.70 0.00 5.70 56.00 0.01 0.00 0.01
4.00 1.83 0.00 1.83 57.00 0.01 0.00 0.01
5.00 1.56 0.00 1.56 58.00 0.01 0.00 0.01
6.00 1.29 0.00 1.29 59.00 0.01 0.00 0.01
7.00 0.74 0.00 0.74 60.00 0.01 0.00 0.01
8.00 0.25 0.00 0.25 61.00 0.01 0.00 0.01
9.00 0.08 0.00 0.08 62.00 0.01 0.00 0.01
10.00 0.05 0.00 0.05 63.00 0.01 0.00 0.01
11.00 0.04 0.00 0.04 64.00 0.01 0.00 0.01
12.00 0.04 0.00 0.04 65.00 0.01 0.00 0.01
13.00 0.04 0.00 0.04 66.00 0.01 0.00 0.01
14.00 0.04 0.00 0.04 67.00 0.01 0.00 0.01
15.00 0.04 0.00 0.04 68.00 0.00 0.00 0.00
16.00 0.04 0.00 0.04 69.00 0.00 0.00 0.00
17.00 0.04 0.00 0.04 70.00 0.00 0.00 0.00
18.00 0.04 0.00 0.04 71.00 0.00 0.00 0.00
19.00 0.04 0.00 0.04 72.00 0.00 0.00 0.00
20.00 0.04 0.00 0.04 73.00 0.00 0.00 0.00
21.00 0.04 0.00 0.04 74.00 0.00 0.00 0.00
22.00 0.04 0.00 0.04 75.00 0.00 0.00 0.00
23.00 0.04 0.00 0.04 76.00 0.00 0.00 0.00
24.00 0.04 0.00 0.04 77.00 0.00 0.00 0.00
25.00 0.04 0.00 0.04 78.00 0.00 0.00 0.00
26.00 0.04 0.00 0.04 79.00 0.00 0.00 0.00
27.00 0.03 0.00 0.03 80.00 0.00 0.00 0.00
28.00 0.03 0.00 0.03 81.00 0.00 0.00 0.00
29.00 0.03 0.00 0.03 82.00 0.00 0.00 0.00
30.00 0.03 0.00 0.03 83.00 0.00 0.00 0.00
31.00 0.03 0.00 0.03 84.00 0.00 0.00 0.00
32.00 0.03 0.00 0.03 85.00 0.00 0.00 0.00
33.00 0.03 0.00 0.03 86.00 0.00 0.00 0.00
34.00 0.03 0.00 0.03 87.00 0.00 0.00 0.00
35.00 0.03 0.00 0.03 88.00 0.00 0.00 0.00
36.00 0.03 0.00 0.03 89.00 0.00 0.00 0.00
37.00 0.03 0.00 0.03 90.00 0.00 0.00 0.00
38.00 0.03 0.00 0.03 91.00 0.00 0.00 0.00
39.00 0.03 0.00 0.03 92.00 0.00 0.00 0.00
40.00 0.03 0.00 0.03 93.00 0.00 0.00 0.00
41.00 0.03 0.00 0.03 94.00 0.00 0.00 0.00
42.00 0.03 0.00 0.03 95.00 0.00 0.00 0.00
43.00 0.03 0.00 0.03 96.00 0.00 0.00 0.00
44.00 0.02 0.00 0.02 97.00 0.00 0.00 0.00
45.00 0.02 0.00 0.02 98.00 0.00 0.00 0.00
46.00 0.02 0.00 0.02 99.00 0.00 0.00 0.00
47.00 0.02 0.00 0.02 100.00 0.00 0.00 0.00
48.00 0.02 0.00 0.02 101.00 0.00 0.00 0.00
49.00 0.02 0.00 0.02 102.00 0.00 0.00 0.00
50.00 0.02 0.00 0.02 103.00 0.00 0.00 0.00
51.00 0.02 0.00 0.02 104.00 0.00 0.00 0.00
52.00 0.02 0.00 0.02 105.00 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Type 11 6-hr 50-Year Rainfall=4.68"
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC Page 62
Hydrograph for Link 5L: OUTFALL (continued)
Time Inflow Elevation Primary
(hours) (cfs) (feet) (cfs)
106.00 0.00 0.00 0.00
107.00 0.00 0.00 0.00
108.00 0.00 0.00 0.00
109.00 0.00 0.00 0.00
110.00 0.00 0.00 0.00
111.00 0.00 0.00 0.00
112.00 0.00 0.00 0.00
113.00 0.00 0.00 0.00
114.00 0.00 0.00 0.00
115.00 0.00 0.00 0.00
116.00 0.00 0.00 0.00
117.00 0.00 0.00 0.00
118.00 0.00 0.00 0.00
119.00 0.00 0.00 0.00
120.00 0.00 0.00 0.00

221011 - DENVER DEFENSE (ASBUILT) Table of Contents
Prepared by W&A Engineering Printed 2/1/2024
HydroCAD® 10.20-2d s/n 06652 ©2021 HydroCAD Software Solutions LLC
TABLE OF CONTENTS
Project Reports
1 Routing Diagram
2 Rainfall Events Listing (selected events)
1-Year Event
3 Node Listing
4 Subcat 1 S: PRE
7 Subcat 2S: POST - A (ROUTED)
10 Subcat 4S: POST- B (BYPASSED)
13 Pond 3P: BMP A
20 Link 5L: OUTFALL
10-Year Event
23 Node Listing
24 Subcat 1 S: PRE
27 Subcat 2S: POST - A (ROUTED)
30 Subcat 4S: POST- B (BYPASSED)
33 Pond 3P: BMP A
40 Link 5L: OUTFALL
50-Year Event
43 Node Listing
44 Subcat 1 S: PRE
47 Subcat 2S: POST - A (ROUTED)
50 Subcat 4S: POST- B (BYPASSED)
53 Pond 3P: BMP A
60 Link 5L: OUTFALL

HensonFoley De nve r De fense
Landscape Architecture I Civil Engineering Lincoln County
Sand Filter De sign
BASIN A
Input
Basin Drainage Area 119,449.00 SF 2.74 AC Max 10 Ac per SF
Impervious Area to Basin 72,929.00 SF
Filter Surface Elevation 841.5
Reference NCDENRBMP Design Ma nua 1 c hp t 11
1. Simple Method for Runoff Volumetric runoff coefficient(Rv)
Rv=0.05+0.9*la
Rv= Runoffcoefficient[stormmnoff(in)/stormrainfall(in)],unitless
Ia= Impervious fra ction[impervious portion ofdrainage area (ac)/drainage area (ac.)],unitles;
Pre De v.Imp Area S.F.= 0.00 AC Pre Ia = 0.0%
Post Dev.Imp.Area S.F.= 1.67 AC Post Ia =-(using s.f#'s)
Drainage Area S.F.= 2.74 AC
Rv= MOM
2. Compute Volume Controlled(Wqv)
WQv=1.0*Rv*A/12
WQv=waterquality protection volume (ac-ft)
Rv=volumetric runoff c oe ffic ient
A=totaldrainage area (acres)
WQV= 967.4 cu.Ft.
WQVadi= cu.Ft. 20%WQV forforebay
3. Determine SA of SF+Sed Chamber
hnaxtnter WQVadi As+AF hmaxite WQVadi/Aaaad+Aced
0.5 4475.5344 8,951.07
1 4475.5344 4,475.53
1.5 4475.5344 2,983.69
2 nrriiMM
2.5 4475.5344 1,790.21
3 4475.5344 1,491.84
3.5 4475.5344 1,278.72
4 4475.5344 1,118.88
4.5 4475.5344 994.56
5 4475.5344 895.11
5.5 4475.5344 813.73
6 4475.5344 745.92
4. Compute Sand FilterArea to Treat Water Quality Volume
Min Surface Area of Sand FiterBed
Af=(WQv*df)/(k*(hf+df)*tf)
Where
Af=surface area of filterbed (sq ft) sq ft
df=filterbed depth(ft) 1.5 ft MN 1.5 FT
k=coefficient ofpermeability offiltermedia (ft/day)= 3.5 ft/day=1.75 in/hr
hf=average height ofwaterabove filterbed(ft) 1.18 ft
tf=design filterbed drain time (days) 2 days NC BMP MAN

Develop Stage Storage for Sand FilterMedia
At elevation of5 feet above filterbed Qo= 5844.91 cf/day= 0.068 cfs
At elevation of4 feet above filterbed Qo= 5009.93 cf/day= 0.058 cfs
At elevation of3 feet above filterbed Qo= 4174.94 cf/day= 0.048 cfs
At elevation of2 feet above filterbed Qo= 3339.95 cf/day= 0.039 cfs
At elevation of1 feet above filterbed Qo= 2504.96 cf/day= 0.029 cfs
At elevation of0 feet above filterbed Qo= 1669.98 cf/day= 0.019 cfs
4.Size Undra ins
Compute minimum drawdown discharge
Water quality volume = 4,475.5 cu.ft.
Drawdown= WQv/(48 hours*3,600 se c/hour)= cfs NC BMP MAN
Compute perforation capacity
4rowsofperforations/ft
Numberofcleanoutsinpipe= 6 (1 per50 ft,at each end ofsytem and bends)
totallength ofunderdrain pipe 87 ft
Numberofperforations= holes
50 percent ofperforations= holes
Capacity ofone hole =CA(2gh)^0.5
cfs
TotalCapacity = cfs
Compute underdrain pipe capacity
For 6-inch PVC underdrain pipe at 0.005 ft/ft slope:
DiameterofPipe = 6 inches
Area ofpipe = -sq.in. sq.ft.
Slope ofpipe = 0.005 ft/ft
manningsn= 0.013
Capacity o f p ip e=(1.49/n)(A)(A/P)^0.67(S)^0.`
=7 0.40 cfs
Fifty percent assuming clogging= 0.20 cfs
*Underdrain capacity okay because Underdraincak capacity is greaterthan sand filterinfiltrationQo
5. Size Concrete Anti-flotation Block:
Volume of Water Displaced: Height of Riser: 7.00 feet
Interior Riser Width 4.00 feet
Wall Thickness: 0.33 feet
Area of Riser: 18.78 s.f.
Volume of Riser: 131.44 c.f.
Interior Volume: 112.00
Weight of Water Displaced: 8202.007 lbs
Safety Factor of 1.1 9022.208 lbs
Bouyant Weight of Concrete=(150 pcf-62.4 pcf)= 87.6 pcf
Volume of Concrete in Structure: 19.44242 cf *Not Including Base
Volume of Concrete Required: 83.55 cf
Concrete Anchor Dimensions:
Depth: 3 feet
Width: 5.28 feet
Volume: 83.55 c.f.
Use a 6'x 6'concrete anchor 3'thick.