SW6191002_STAMPED HYDROLOGY REPORT_10/30/2019

Hydrology Study
For
Ft. Bragg
Pope Field, North Carolina
Prepared for:
USAGE
Malvesti Street
Pope Field, NC 28308
Prepared by. -
Jerry Oberholtzer
L(D"TVA
ENGINEERS
October 9, 2019

Contents
I. Executive Summary..............................................................................1
II. Hydrology.............................................................................................1
A. Objectives................................................................................................................... 1
B. Model Development................................................................................................... 1
III. Existing Conditions Hydrologic Analysis (Pre -Development) ................. 3
IV. Proposed Conditions Hydrologic Analysis (Post -Development) ............. 5
V. Conclusion..........................................................................................10
Tables
Table 1: Rainfall Recurrence Intervals............................................................................2
Table 2: Study Point #1 Pre -Development Peak Flows....................................................3
Table 3: Study Point #2 Pre -Development Peak Flows....................................................3
Table 4: Study Point #3 Pre -Development Peak Flows....................................................4
Table 5: Study Point #4 Pre -Development Peak Flows....................................................4
Table 6: Overall Site Pre -Development Peak Flows........................................................4
Table 7: Study Point #1 Post -Development Peak Flows..................................................5
Table 8: Study Point #2 Post -Development Peak Flows..................................................6
Table 9: Study Point #3 Post -Development Peak Flows..................................................6
Table 10: Study Point #4 Post -Development Peak Flows................................................6
Table 11: Overall Site Post -Development Peak Flows.....................................................7
Table 12: Study Point #1 Pre -Development and Post -Development Comparison ............7
Table 13: Study Point #2 Pre -Development and Post -Development Comparison ............8
Table 14: Study Point #3 Pre -Development and Post -Development Comparison ............8
Table 15: Overall Site Pre -Development and Post -Development Comparison.................9
Exhibits
Exhibit 1: Vicinity Map................................................................................................12
Exhibit2: Soils Map.....................................................................................................13
Appendices
Appendix 1: Valdosta NOAA Precipitation Data...........................................................14
Appendix 2: Drainage Basin Maps...............................................................................15
Appendix 3: Army LID Planning Tool Reports...............................................................19
Appendix 4: Calculations/Hydraflow Results...............................................................20

I. Executive Summary
Lowe Engineers has prepared this hydrological study on behalf of the United States Army Corps of
Engineers for the proposed development of the SOF Operations Support Facility. The facility
includes the construction of a 17,000 SF building, pavement, and approximately 100 parking
spaces. The Ft. Bragg SOF project proposes to develop ±2.59 acres of property located at Malvesti
Street, Pope Field, North Carolina in Cumberland County. The project location is depicted on the
Vicinity Map, Exhibit 1.
II. Hydrology
A. Objectives
This hydrology study evaluates the existing (pre -development) and proposed (post -development)
hydrologic conditions of the site to determine the requirements for stormwater quality, detention,
and extreme flood protection. This study was developed using the federal and state laws which
govern the National Pollutant Discharge Elimination System (NPDES), as part of the CFR 40 Clean
Water Act, and mandates local authorities to review, permit, and enforce all point discharges into
waters of the United States, such as land disturbing activities in excess of 1-acre. EISA section 438
compliance was also ensured via the Army LID Planning and Cost Tool, which can be reviewed in
Appendix 3.
B. Model Development
Hydraflow Hydrographs version 12, which is an extension of AutoCAD Civil 3D 2018, was used to
model the existing and proposed drainage, bioretention pond, and detention pond. The model
uses the Soil Conservation Service (SCS) TR-20 hydrology method and the watershed lag method
for calculating time of concentration (Tc). The following information is necessary to utilize the SCS
method:
1. Determination of curve numbers in the drainage areas which is representative of the land
uses and their hydrologic soil types.
2. Calculations of the times of concentration (longest) to their respective study points.
3. Type II rainfall distribution hydrographs, which are used to determine the total and excess
rainfall amounts.
The model uses a standard time series plot generated for an SCS Type II 24-hour rainfall
distribution event for the 1-, 2-, 5-, 10-, 25-, 50-, and 100-year rainfall depths specific to that
geographic location. Rainfall depths for this project were obtained from the NOAA Atlas website
using Station Experiment, Site ID 31-6891. The design precipitation depths are listed below in
Table 1. Additionally, the primary storm pipe network was designed via the Rational Method (using
the 25-yr 5-min rainfall intensity of 8.78 in/hr) and Hydraflow Storm Sewers version 12. The profile
and calculations can be reviewed in Appendix 4.

Table 1: Rainfall Recurrence Intervals
Rainfall
Recurrence Depth
(inches)
Inches)
1-year
3.07
2-year
3.71
5-year
4.68
10-year
5.44
25-year
6.50
50-year
7.34
100-year
8.21
To accurately determine total discharge volumes and rates, the pre -developed and post -
developed sites were divided into sub -basins with varying curve numbers and times of
concentration. Per the USGS Soils Map (Exhibit 2), curve numbers for Hydrologic Soils Group
(HSG) "B" were utilized. To show the retention of the 951" percentile rain event, an EISA section
438 requirement, the Army LID Planning Tool was used. See Appendix 3 for the Army LID Planning
Tool report.
Areas of relatively concentrated flows were assigned hydrological study point numbers, of which
there are 4. Study point #1 is the general pre -developed discharge area for "PRE -BASIN #1" and
the post -developed discharge area for the detention pond (which includes "POST -BASIN #1" and
"POST -BASIN #2) and "POST -BASIN BYPASS #1". Study point #2 is a more generalized area of
discharge for "PRE -BASIN #2" and "POST -BASIN BYPASS #2". Study point #3 is an existing catch
basin ("PRE -BASIN OFFSITE" & "PRE -BASIN BYPASS") to be converted to a drain inlet and drained
into from "POST -BASIN BYPASS #3 & POST -BASIN OFFSITE". Study Point #4 is a small area which is
to remain unchanged, regarding impervious area, from its pre -developed to post -developed
condition. To review the sub -basin maps as well as all pre -basin and post -basin routing, see
drainage basin maps in Appendix 2 and routing models in the Hydraflow report in Appendix 4,
respectively.
To model the bioretention pond volume and its associated outlet control structure, the
hydrograph for "POST -BASIN #1" was routed into the bioretention pond. The bioretention pond
and "POST -BASIN #2" (the area which will drain to the detention pond) were routed into the
detention pond. To ensure 10-yr event outlet velocities adhere to NPDES standards, the 10-yr
flow rate from the detention pond was entered into Hydraflow Express. More information, as
well as a cross -sectional view of the pipe, regarding the 10-yr flow rate obtained from Hydraflow
analysis can be reviewed in Appendix 4.
2

III. Existing Conditions Hydrologic Analysis (Pre -Development)
The project site consists of a medium dense wooded forest land with ascetically fair draining soils
in good condition (Hydrologic Soil Group B). The topography slopes mildly to moderately across
the site from East to West. The site is located within the Cape Fear River Basin and drains
southwestwardly to Tank Creek which connects to Little River approximately 3.5 miles
downstream. No portion of Tank Creek or Little River are classified as 303(d) impaired
waterbodies. All upstream runoff, except that which is labeled as "OFFSITE", is diverted by an
existing curb and gutter and therefore is not included in calculations.
Pre -development peak flowrates and hydraulic volumes were calculated, and their results are
depicted in the tables below. Table 2 shows the flowrates and hydraulic volumes for "Study Pt.
#1". Table 3 shows the flowrates and hydraulic volumes for "Study Pt. #2". Table 4 shows the
flowrates and hydraulic volumes for "Study Pt. #3", which includes the limited amount of offsite
runoff. Table 5 flowrates and hydraulic volumes for "Study Pt. #4". Table 6 shows the overall site
flowrates and hydraulic volumes for each pre -developed stormwater event.
Table 2: Study Point #1 Pre -Development Peak Flows (Pre -Basin #1)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
0.715
1,848
2
1.219
2,929
5
2.088
4,835
10
2.832
6,497
25
3.931
8,998
50
4.846
11,096
100
5.838
13,354
Table 3: Study Point #2 Pre -Development Peak Flows (Pre -Basin #2)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
1.54
3,664
2
2.37
5,487
5
3.751
8,588
10
4.902
11,226
25
6.611
15,124
50
8.011
18,347
100
9.485
21,781

Table 4: Study Point #3 Pre -Development Peak Flows (Pre -Basin #s 3 & 4+ Pre -Basin Offsite)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
1.204
2,923
2
1.595
3,815
5
2.222
5,252
10
2.731
6,431
25
3.460
8,132
50
4.051
9,514
100
4.677
10,970
Table 5: Study Point #4 Pre -Development Peak Flows (Pre -Basin #5)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
0.112
231
2
0.174
349
5
0.276
552
10
0.361
725
25
0.486
982
50
0.591
1,195
100
0.701
1,423
Table 6: Overall Site Pre -Development Peak Flows
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
3.571
8,666
2
5.358
12,580
5
8.337
19,227
10
10.826
24,879
25
14.488
33,236
50
17.499
40,152
100
20.701
47,528

IV. Proposed Conditions Hydrologic Analysis (Post -Development)
The proposed site consists of a 17,000 SF building, pavement, and approximately 100 parking
spaces. The addition of these materials will result in the percentage of post -developed impervious
area being greater than that of the impervious area in pre -developed conditions. Impervious area
percentages for individual sub -basins can be reviewed in Appendix 2.
Differing site conditions between the pre -developed and post -developed site will result in
increased impervious area. As a result of the increased impervious area, soil infiltration rates will
be reduced. Because the developed site will be infiltrating at a lower rate, stormwater runoff will
increase. Increased runoff generated by the building roof will be diverted away from "Study Pt.
#2" and drain to a bioretention pond which will discharge to a detention pond. The detention
pond outflow, where all treated stormwater will be routed, is "Study Pt. #1". Table 7 shows the
flowrates and hydraulic volumes for "Study Pt. #1". Table 8 shows the flowrates and hydraulic
volumes for "Study Pt. #2", which is where stormwater cannot be collected due to topographical
constraints. Table 9 shows the flowrates and hydraulic volumes for "Study Pt. #3", which includes
the limited amount of offsite runoff. Table 10 shows the flowrates and hydraulic volumes for
"Study Pt. #4", which are expected to remain the same as no impervious area is to be added or
removed. Table 11 shows the overall site flowrates and hydraulic volumes for each post -
developed stormwater event.
The pre -developed and post -developed comparisons of peak flowrates and hydraulic volumes for
each study point and rain event were also calculated. Table 12 shows the peak flowrate and
hydraulic volume percentage changes for "Study Pt. #1". Table 13 shows the peak flowrate and
hydraulic volume percentage changes for "Study Pt. #2". Table 14 shows the peak flowrate and
hydraulic volume percentage changes for "Study Pt. #3". Table 15 shows that the overall site peak
flowrate and hydraulic volume percentage changes are within the limits set by the NCDEQ
Stormwater Design Manual. The pre -developed and post -developed conditions for "Study Pt. #4"
are to remain the same, so there is no peak discharge rate or volumetric change.
Table 7: Study Point #1 Post -Development Peak Flows (Post -Basin #s 1 & 2 + Post -Basin Bypass #1)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
0.178
659
2
0.339
1,135
5
0.687
4,940
10
0.964
8,692
25
1.405
14,238
50
1.851
18,829
100
3.124
23,747

Table 8: Study Point #2 Post -Development Peak Flows (Post -Basin Bypass #2)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
1.747
4,028
2
2.265
5,271
5
3.054
7,209
10
3.672
8,756
25
4.53
10,941
50
5.207
12,688
100
5.905
14,507
Table 9: Study Point #3 Post -Development Peak Flows (Post -Basin Bypass #s 3 & 4 + Post -Basin Offsite)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
1.066
2,712
2
1.317
3,361
5
1.707
4,361
10
2.016
5,159
25
2.453
6,285
50
2.803
7,186
100
3.167
8,126
Table 10: Study Point #4 Post -Development Peak Flows (Post -Basin Bypass #5)
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (W)
1
0.112
231
2
0.174
349
5
0.276
552
10
0.361
725
25
0.486
982
50
0.591
1,195
100
0.701
1,423

Table 11: Overall Site Post -Development Peak Flows
Frequency (yr)
Peak Discharge (cfs)
Hydraulic Volume (ft3)
1
3.103
7,630
2
4.095
10,116
5
5.724
17,062
10
7.013
23,332
25
8.874
32,446
50
10.452
39,898
100
12.897
47,803
Table 12: Study Pt. #1 Pre -Development & Post -Development Comparison
Frequency (yr)
Pre -Development
Peak Discharge
(cfs)
Pre -Development
Hydraulic Volume
(ft3)
post -Development
Peak Discharge (cfs)
Post -Development
3
Hydraulic Volume (ft)
1
0.715
1,848
0.178
659
2
1.219
2,929
0.339
1,135
5
2.088
4,835
0.687
4,940
10
2.832
6,497
0.964
8,692
25
3.931
8,998
1.405
14,238
50
4.846
11,096
1.851
18,829
100
5.838
13,354
3.124
23,747
Frequency (yr)
Post -Development
Discharge Rate Change (%)
Post -Development Hydraulic
Volume Change (%)
1
-75.10%
-64.34%
2
-72.19%
-61.25%
5
-67.10%
2.17%
10
-65.96%
33.78%
25
-64.26%
58.24%
50
-61.80%
69.69%
100
-46.49%
77.83%

Table 13: Study Pt. #2 Pre -Development & Post -Development Comparison
Frequency (yr)
Pre -Development
Peak Discharge
(cfs)
Pre -Development
Hydraulic Volume
(ft3)
Post -Development
Peak Discharge (cfs)
Post-Development3
Hydraulic Volume (ft)
1
1.54
3,664
1.747
4,028
2
2.37
5,487
2.265
5,271
5
3.751
8,588
3.054
7,209
10
4.902
11,226
3.672
8,756
25
6.611
15,124
4.53
10,941
50
8.011
18,347
5.207
12,688
100
9.485
21,781
5.905
14,507
Frequency (yr)
Post -Development
Discharge Rate Change (%)
Post -Development Hydraulic
Volume Change (%)
1
13.44%
9.93%
2
-4.43%
-3.94%
5
-18.58%
-16.06%
10
-25.09%
-22.00%
25
-31.48%
-27.66%
50
-35.00%
-30.84%
100
-37.74%
-33.40%
Table 14: Study Pt. #3 Pre -Development & Post -Development Comparison
Frequency (yr)
Pre -Development
Peak Discharge
(cfs)
Pre -Development
Hydraulic Volume
(ft3)
post -Development
Peak Discharge (cfs)
Post -Development
3
Hydraulic Volume (ft )
1
1.204
2,923
1.066
2,712
2
1.595
3,815
1.317
3,361
5
2.222
5,252
1.707
4,361
10
2.731
6,431
2.016
5,159
25
3.460
8,132
2.453
6,285
50
4.051
9,514
2.803
7,186
100
4.677
10,970
3.167
8,126

Frequency (yr)
Post -Development
Discharge Rate Change (%)
Post -Development Hydraulic
Volume Change (%)
1
-11.46°%
-7 22°%
2
-17.43%
-11.90%
5
-23.18%
-16.96%
10
-26.18%
-19.78%
25
-29.10%
-22.71%
50
-30.81%
-24.47%
100
-32.29%
-25.93%
Table 15: Overall Site Pre -Development & Post -Development Comparison
Frequency (yr)
Pre -Development
Peak Discharge
(cfs)
Pre -Development
Hydraulic Volume
(ft3)
post -Development
Peak Discharge (cfs)
Post -Development
3
Hydraulic Volume (ft)
1
3.571
8,666
3.103
7,630
2
5.358
12,580
4.095
10,116
5
8.337
19,227
5.665
14,179
10
10.826
24,879
6.978
19,271
25
14.488
33,236
8.806
27,153
50
17.499
40,152
10.313
33,675
100
20.701
47,528
12.077
40,629
Frequency (yr)
Post -Development
Discharge Rate Change (%)
Post -Development Hydraulic
Volume Change (%)
1
-13.11%
-11.95%
2
-23.57%
-19.59%
5
-32.05%
-26.25%
10
-35.54%
-22.54%
25
-39.22%
-18.30%
50
-41.07%
-16.13%
100
-41.66%
-14.52%

V. Conclusion
The proposed site plan's increase in impervious area will result in varying pre -developed and
post -developed flowrate and hydraulic volume changes. Overall site post -developed conditions
will reduce hydraulic volumes for all rain events, therefore runoff from all storms will fall within
the NC Stormwater Rule 15A NCAC 02H .1002 (44) "Runoff volume match" definition which states
that "annual runoff volume after development shall not be more than ten percent higher than the
annual runoff volume before development." Study Point #1 results show that pre -developed and
post -developed flowrate and hydraulic volume percentage changes vary amongst rain events,
with more common rain events resulting in decreased volumes and less common events causing a
runoff volume increase. These variations are due to the bioretention pond retaining a greater
percentage of runoff for common rain events when compared to volume retained for atypical rain
events. The notable variation is also due to the post -developed "Study Point #1" being the
primary discharge location for most of the post -developed site, so higher hydraulic volumes at
this point are to be expected. Study Point #2 also shows substantial variation amongst pre -
developed and post -developed flowrates and hydraulic volumes for each rain event, but with an
increase in flowrates and hydraulic volumes with more common rain events and a decrease in
flowrates and hydraulic volumes with less common rain events. The change is due to the
considerable reduction in area that will be draining to Study Point #2 in its post -developed
condition. Study Point #3 shows consistent reductions in flowrates and hydraulic volumes for all
rain events. These are due to the slight area reduction that will be draining to that point. Study
Point #4 experiences no change in discharge rates or volumes as the area draining to this point is
to be returned to its pre -developed condition following construction completion.
The increased post -developed runoff will be controlled by routing the applicable post -developed
area to a bioretention pond for stormwater quality which will then be directed to a detention
pond for discharge flowrate and velocity control. Due to topographical constraints, portions of
the post -developed site (those which drain to Study Point #s 2, 3, and 4) runoff will not be
collected. To meet NCDEQ and NPDES requirements, the post -developed site stormwater control
measures were designed to ensure that overall site flowrates and hydraulic volumes for all rain
events are within the parameters set by said requirements. To meet EISA section 438 retention
volume requirements as well as ensure bioretention performance and longevity, analysis was
conducted via the Army LID Planning Tool and Hydraflow Hydrographs. Results from the analyses
show required retention volume at 4,198 ft3 which will be exceeded by the bioretention pond
with a retention volume of approximately 5,856 ft3.
10

Exhibits
Exhibit 1 Vicinity Map
Exhibit 2 Soils Map
11

Vicinity Map
z
Exhibit 1
WA-1
S
12

Exhibit 2
sa u ap--Qm"ilana C rft ND& carofna
L' ,t
A
Glow d
fL
�lw� •t _ .0. y.� _r.�7�'
:r
J
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t ID W0 1IA 1WJ
�'�'4 f*9�'"'IYn� �r �d.emi rlmla [�je IXg:l'1M m�Il!I Hf{e+
i � : Natures, aesw,r�e: wen: m &—y a: tid•zo, e
� Conservation -'- National Coop era.aire SvA Survey Pape +. o' 3
Map Unit Symbol
Map Unit Name
Acres in AO!
Percent of A0h
BaB
B�wey loamy sand, 2 to 8
percent slopes
10.1
5.7 y
BdB
Blaney -Urban land o>ompleK, 2
to 8 percent slopes
9.4
5.3:4
CaB
Cando, sand, 1 to 8 peeeeri
slopes
8.4
4.7'4
Gd6
Gilead barry sand. 2 to 8
woe-m slope's
32.8
18.5%
JT
Johnston loam
142
So.
Ud
Udorthents. loamy
10.9
8.2%
WyB
Wapram-Urbw land comp+ex
0 to 8 percent slopes
91.6
51-8%
Totals for Area of Interest
177.A
! D04%
13

Appendices
Appendix 1: Pope Army Airfield NOAA Precipitation Data
Appendix 2: Drainage Basin Maps
Appendix 3: Army LID Planning Tool Reports
Appendix 4: Calculations/Hydraflow Results
14

Appendix 1
Pope Army Airfield NOAA Precipitation Data
NOAA Atlas 14, Volume 2, Verston 3 POPE AF6
Station ID: 31-6591
Location name- Pope Arrny Airfield, North
Carolina, USA,
Latitude: 35.1739`, Longitude:-79.008V
Elevation:
Elevation (station metadata)218 ft"
'.F
PLANT PRECIPITATION FREpUENCY ESTIMATES
G-M. RWAF. D. VATM. A. �-n, T. FYi b5k. 1a"Tle rta and ❑ Rl l+
YDA , rlatonal 'h'e4[r . Zeroce. 8:1rN 20". Msy4nd
PF tabular i PF hp ical ! Maps : 3e6315
PF tabular
PD5-based point precipitation frequency estimates with 90% confidence intervals (in inches),
Average recurrence inWvai (years}
Duration
-
1 2 5 10 ! 25 50 100 1 200 I 500 TDQO
5-nnin
0.434
0.512
0.596
0.659
0-732 0.7E3
0-832
0.875
0.928
0.96E
D.39i-0.4a7
.461-0-574
D.53T-0b69
0.592-0.736.
D.6S4-0.81T1 I07D0-01873
0.73a-c.925'
f0-774-0-973
0,513-1.03i
.W-1.08
10-inin
0.694
0.815
1 !
Q.955
1
1,05
1.17
1.25
1.32
1,39
IA7
�
1.53
IC.624-0.778
0.735.0.91a
0.860-1.07
.96{r1.ta
1.D4-1.30
1.11-t.39
1.t7-1.4
123-1"54
1.29.1.63
1,33-1,69
15-min
0.867
j 1.03 1
1.21
1,33
1.4E
1.59
1.67
1.75
1.85 j
191
fo"78D-0"972
' 10-927.1-16 1
1.09.1"351
'120-1 i9
I.32-1.65
1Al-1.76
1"48.I'M
1.55-1"%
1"62.2"05 1
1.67-212
30-Min
1,19
1.42
132
113
2.19
2.38
2.56
213
2.94
3.10
1-07-1.M
� 1-55.1-92)
(1-73-2-16)
(I-W2A4
213-U5
-27-2-851
{241-3-03
2-58-327
70-3.41
1.48
1.79
2.20
151
232
3.22
3.53
3,22
422
4 52
60-alin
1.33-1.65
1"61-2-00k
1.91447
226-2-81
2-61-3,261
l
,' 12Ba359
.1",9
(3,38-425)
(3.T04.68
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2-tw
1.74
110
2AS
110
3.56 3,99
A
1.55.1.97
1.a8.23a'
2.34-2.97]
2.70-342
3.15�.031 ,: 13.51,650
.85d.%
6.193A3
d,fi3-6,D6
6.g6.6,S1
3
1"85
221
2-80
32fi
397 4"37
4 8E
�4.26ti5.5C1
5�11
8-14
6.73
1.65-2"09i
,• i2.D0.2"53'
'2.50-118]
2"9G-3-68
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r r MftaNn treWency (PF1 estlmate5 n na t3de are ba W or "%Ierq ana" of partial Mton serves IPOS�.
Nu11bm ;n parerrtrlears are PF ewYr,ate6 at over and upper Gowiddi Y. the 90% con0oence Irberal. 7t1! prouab-try that preMltal n'PreWercy e&UTaoe6 [For
given durallon and average recurrence IrtM47f 'Al it be geatcr *.Ian lie t4PK bound {or Tess 013n me lop or ool:no;s 5%. Esnm ales at LPM bourdi are
rat aYeaea ag.31r5, probable mUTrpum predprx on i PVP; e6Crnaie5 and may be hVW 71W C ILlr r :3110 W.1P udlues.
Phase reler 7o 40AA Anus 14 document'r more inhxnawn"
15

Appendix 2
Drainage Basin Maps
16

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18

Appendix 3
Army LID Planning and Cost Tool Report
PROJECT INFO SITE. INFO] A_ND EISA VOLUME
Date REQUIREMENT
Army Command IMCOM Project limit of distur6anee (ac) 2.59
Army Installation Fort Bragg
9S% rainfall depth (in) I.8
Project name 5UF OPL•'RA-1.10NS FAC1Ll7' Soil type Sandy -Loam
Project rlescriptian Hydrologic Soil Group ("SG
New building and as"ated parking Pre Project curve number (CN) G7
Post project currc number (CN) 83
Llscr Name SKW Prc-project runoff volume (co I _ 1088
Master Phnncr LUWE ENGINE Post project runoff volume (cr) F 5285
EISA Section 438 retention volume 419$
requirement (cf)
LID PLANNING SUMMARY
Stnictural BMP
Surface area
Runoff volume
Mon -structural SHIP
M
tetained (co
Bioretention:
6950
5651
Veg. Fi1tcr Strip (Slope >2%, Shun Grass):
Swale-
2948
20S
Veg. Filter Strip (Slope >2%, Tall Gras);
Permeable Pavement;
0
Veg. Filter Strip (Slope E2%, Sharl Grass):
Rainwater Harvesting:
Veg. Filter Strip (Slope <2%, Tall Grassy
Green Roof:
0:1
0�
Reforestation (Trees - Short Crass);
Infiltration Practice:
0 —1
0 l
Reforestation (Trees - Shruhs and Tall Grass)
Total retention volume provided by BM Ps (cf): 5856
Project complies with EISA Section 438.
LID COST SUAIMARY
Surface
area (ac)
n.ofl
0.00 ]
f?,00
0,0
0,00
0.00
19

Appendix 4
Calculations/Hydraflow Results
20

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Hydraflow Table of Contents
BIORET & DET POND - TYPE II.gpw
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Watershed Model Schematic...................................................................................... 1
Hydrograph Return Period Recap............................................................................. 2
Year
SummaryReport
......................................................................................................................... 3
HydrographReports...................................................................................................................
4
Hydrograph No.
1, SCS Runoff, PRE 1....................................................................................
4
Hydrograph No.
2, SCS Runoff, PRE 2....................................................................................
5
Hydrograph No.
3, SCS Runoff, POST 1.................................................................................
6
Hydrograph No.
4, Reservoir, BIORETENTION.......................................................................
7
Hydrograph No.
5, SCS Runoff, POST BYPASS 1..................................................................
8
Hydrograph No.
6, SCS Runoff, PRE 4....................................................................................
9
Hydrograph No.
7, SCS Runoff, PRE 5..................................................................................
10
Hydrograph No.
8, SCS Runoff, POST BYPASS 2................................................................
11
Hydrograph No.
9, SCS Runoff, POST BYPASS a...............................................................
12
Hydrograph No.
10, SCS Runoff, POST 2.............................................................................
13
Hydrograph No.
11, Combine, POST TO POND....................................................................
14
Hydrograph No.
12, Reservoir, DETENTION.........................................................................
15
Hydrograph No.
13, SCS Runoff, PRE 3................................................................................
16
Hydrograph No.
14, SCS Runoff, POST BYPASS 4..............................................................
17
Hydrograph No.
15, SCS Runoff, POST OFFSITE................................................................
18
Hydrograph No.
16, SCS Runoff, PRE OFFSITE..................................................................
19
Hydrograph No.
17, SCS Runoff, POST BYPASS 5..............................................................
20
Hydrograph No.
18, Combine, PRE TOTAL..........................................................................
21
Hydrograph No.
19, Combine, POST SUBTOTAL................................................................
22
Hydrograph No.
20, Combine, POST TOTAL........................................................................
23
2 - Year
SummaryReport
.......................................................................................................................
24
HydrographReports.................................................................................................................
25
Hydrograph No.
1, SCS Runoff, PRE 1..................................................................................
25
Hydrograph No.
2, SCS Runoff, PRE 2..................................................................................
26
Hydrograph No.
3, SCS Runoff, POST 1...............................................................................
27
Hydrograph No.
4, Reservoir, BIORETENTION.....................................................................
28
Hydrograph No.
5, SCS Runoff, POST BYPASS 1................................................................
29
Hydrograph No.
6, SCS Runoff, PRE 4..................................................................................
30
Hydrograph No.
7, SCS Runoff, PRE 5..................................................................................
31
Hydrograph No.
8, SCS Runoff, POST BYPASS 2................................................................
32
Hydrograph No.
9, SCS Runoff, POST BYPASS a...............................................................
33
Hydrograph No.
10, SCS Runoff, POST 2.............................................................................
34
Hydrograph No.
11, Combine, POST TO POND....................................................................
35
Hydrograph No.
12, Reservoir, DETENTION.........................................................................
36
Hydrograph No.
13, SCS Runoff, PRE 3................................................................................
37
Hydrograph No.
14, SCS Runoff, POST BYPASS 4..............................................................
38
Hydrograph No.
15, SCS Runoff, POST OFFSITE................................................................
39
Hydrograph No.
16, SCS Runoff, PRE OFFSITE..................................................................
40
Hydrograph No.
17, SCS Runoff, POST BYPASS 5..............................................................
41

Contents continued...
BIORET & DET POND - TYPE Il.gpw
Hydrograph No. 18, Combine, PRE TOTAL.......................................................................... 42
Hydrograph No. 19, Combine, POST SUBTOTAL................................................................ 43
Hydrograph No. 20, Combine, POST TOTAL........................................................................ 44
5 - Year
SummaryReport
.......................................................................................................................
45
HydrographReports.................................................................................................................
46
Hydrograph No.
1, SCS Runoff, PRE 1..................................................................................
46
Hydrograph No.
2, SCS Runoff, PRE 2..................................................................................
47
Hydrograph No.
3, SCS Runoff, POST 1...............................................................................
48
Hydrograph No.
4, Reservoir, BIORETENTION.....................................................................
49
Hydrograph No.
5, SCS Runoff, POST BYPASS 1................................................................
50
Hydrograph No.
6, SCS Runoff, PRE 4..................................................................................
51
Hydrograph No.
7, SCS Runoff, PRE 5..................................................................................
52
Hydrograph No.
8, SCS Runoff, POST BYPASS 2................................................................
53
Hydrograph No.
9, SCS Runoff, POST BYPASS a...............................................................
54
Hydrograph No.
10, SCS Runoff, POST 2.............................................................................
55
Hydrograph No.
11, Combine, POST TO POND....................................................................
56
Hydrograph No.
12, Reservoir, DETENTION.........................................................................
57
Hydrograph No.
13, SCS Runoff, PRE 3................................................................................
58
Hydrograph No.
14, SCS Runoff, POST BYPASS 4..............................................................
59
Hydrograph No.
15, SCS Runoff, POST OFFSITE................................................................
60
Hydrograph No.
16, SCS Runoff, PRE OFFSITE..................................................................
61
Hydrograph No.
17, SCS Runoff, POST BYPASS 5..............................................................
62
Hydrograph No.
18, Combine, PRE TOTAL..........................................................................
63
Hydrograph No.
19, Combine, POST SUBTOTAL................................................................
64
Hydrograph No.
20, Combine, POST TOTAL........................................................................
65
10 -Year
SummaryReport
.......................................................................................................................
66
HydrographReports.................................................................................................................
67
Hydrograph No.
1, SCS Runoff, PRE 1..................................................................................
67
Hydrograph No.
2, SCS Runoff, PRE 2..................................................................................
68
Hydrograph No.
3, SCS Runoff, POST 1...............................................................................
69
Hydrograph No.
4, Reservoir, BIORETENTION.....................................................................
70
Hydrograph No.
5, SCS Runoff, POST BYPASS 1................................................................
71
Hydrograph No.
6, SCS Runoff, PRE 4..................................................................................
72
Hydrograph No.
7, SCS Runoff, PRE 5..................................................................................
73
Hydrograph No.
8, SCS Runoff, POST BYPASS 2................................................................
74
Hydrograph No.
9, SCS Runoff, POST BYPASS a...............................................................
75
Hydrograph No.
10, SCS Runoff, POST 2.............................................................................
76
Hydrograph No.
11, Combine, POST TO POND....................................................................
77
Hydrograph No.
12, Reservoir, DETENTION.........................................................................
78
Hydrograph No.
13, SCS Runoff, PRE 3................................................................................
79
Hydrograph No.
14, SCS Runoff, POST BYPASS 4..............................................................
80
Hydrograph No.
15, SCS Runoff, POST OFFSITE................................................................
81
Hydrograph No.
16, SCS Runoff, PRE OFFSITE..................................................................
82
Hydrograph No.
17, SCS Runoff, POST BYPASS 5..............................................................
83
Hydrograph No.
18, Combine, PRE TOTAL..........................................................................
84
Hydrograph No.
19, Combine, POST SUBTOTAL................................................................
85

Contents continued...
BIORET & DET POND - TYPE Il.gpw
Hydrograph No.
20, Combine, POST TOTAL........................................................................
86
25 - Year
SummaryReport
.......................................................................................................................
87
HydrographReports.................................................................................................................
88
Hydrograph No.
1, SCS Runoff, PRE 1..................................................................................
88
Hydrograph No.
2, SCS Runoff, PRE 2..................................................................................
89
Hydrograph No.
3, SCS Runoff, POST 1...............................................................................
90
Hydrograph No.
4, Reservoir, BIORETENTION.....................................................................
91
Hydrograph No.
5, SCS Runoff, POST BYPASS 1................................................................
92
Hydrograph No.
6, SCS Runoff, PRE 4..................................................................................
93
Hydrograph No.
7, SCS Runoff, PRE 5..................................................................................
94
Hydrograph No.
8, SCS Runoff, POST BYPASS 2................................................................
95
Hydrograph No.
9, SCS Runoff, POST BYPASS a...............................................................
96
Hydrograph No.
10, SCS Runoff, POST 2.............................................................................
97
Hydrograph No.
11, Combine, POST TO POND....................................................................
98
Hydrograph No.
12, Reservoir, DETENTION.........................................................................
99
Hydrograph No.
13, SCS Runoff, PRE 3..............................................................................
100
Hydrograph No.
14, SCS Runoff, POST BYPASS 4............................................................
101
Hydrograph No.
15, SCS Runoff, POST OFFSITE..............................................................
102
Hydrograph No.
16, SCS Runoff, PRE OFFSITE................................................................
103
Hydrograph No.
17, SCS Runoff, POST BYPASS 5............................................................
104
Hydrograph No.
18, Combine, PRE TOTAL........................................................................
105
Hydrograph No.
19, Combine, POST SUBTOTAL..............................................................
106
Hydrograph No.
20, Combine, POST TOTAL......................................................................
107
50 - Year
SummaryReport
.....................................................................................................................
108
HydrographReports...............................................................................................................
10g
Hydrograph No.
1, SCS Runoff, PRE 1................................................................................
109
Hydrograph No.
2, SCS Runoff, PRE 2................................................................................
110
Hydrograph No.
3, SCS Runoff, POST 1.............................................................................
111
Hydrograph No.
4, Reservoir, BIORETENTION...................................................................
112
Hydrograph No.
5, SCS Runoff, POST BYPASS 1..............................................................
113
Hydrograph No.
6, SCS Runoff, PRE 4................................................................................
114
Hydrograph No.
7, SCS Runoff, PRE 5................................................................................
115
Hydrograph No.
8, SCS Runoff, POST BYPASS 2..............................................................
116
Hydrograph No.
9, SCS Runoff, POST BYPASS a.............................................................
117
Hydrograph No.
10, SCS Runoff, POST 2...........................................................................
118
Hydrograph No.
11, Combine, POST TO POND..................................................................
119
Hydrograph No.
12, Reservoir, DETENTION.......................................................................
120
Hydrograph No.
13, SCS Runoff, PRE 3..............................................................................
121
Hydrograph No.
14, SCS Runoff, POST BYPASS 4............................................................
122
Hydrograph No.
15, SCS Runoff, POST OFFSITE..............................................................
123
Hydrograph No.
16, SCS Runoff, PRE OFFSITE................................................................
124
Hydrograph No.
17, SCS Runoff, POST BYPASS 5............................................................
125
Hydrograph No.
18, Combine, PRE TOTAL........................................................................
126
Hydrograph No.
19, Combine, POST SUBTOTAL..............................................................
127
Hydrograph No.
20, Combine, POST TOTAL......................................................................
128
100 - Year

Contents continued...
BIORET & DET POND - TYPE Il.gpw
SummaryReport
.....................................................................................................................
129
HydrographReports...............................................................................................................
130
Hydrograph No.
1, SCS Runoff, PRE 1................................................................................
130
Hydrograph No.
2, SCS Runoff, PRE 2................................................................................
131
Hydrograph No.
3, SCS Runoff, POST 1.............................................................................
132
Hydrograph No.
4, Reservoir, BIORETENTION...................................................................
133
Hydrograph No.
5, SCS Runoff, POST BYPASS 1..............................................................
134
Hydrograph No.
6, SCS Runoff, PRE 4................................................................................
135
Hydrograph No.
7, SCS Runoff, PRE 5................................................................................
136
Hydrograph No.
8, SCS Runoff, POST BYPASS 2..............................................................
137
Hydrograph No.
9, SCS Runoff, POST BYPASS 3..............................................................
138
Hydrograph No.
10, SCS Runoff, POST 2...........................................................................
139
Hydrograph No.
11, Combine, POST TO POND..................................................................
140
Hydrograph No.
12, Reservoir, DETENTION.......................................................................
141
Hydrograph No.
13, SCS Runoff, PRE 3..............................................................................
142
Hydrograph No.
14, SCS Runoff, POST BYPASS 4............................................................
143
Hydrograph No.
15, SCS Runoff, POST OFFSITE..............................................................
144
Hydrograph No.
16, SCS Runoff, PRE OFFSITE................................................................
145
Hydrograph No.
17, SCS Runoff, POST BYPASS 5............................................................
146
Hydrograph No.
18, Combine, PRE TOTAL........................................................................
147
Hydrograph No.
19, Combine, POST SUBTOTAL..............................................................
148
Hydrograph No.
20, Combine, POST TOTAL......................................................................
149
OFReport................................................................................................................ 150

1
Watershed Model Schematic Hydraflow Hydrographs Extension forAutodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
12
2®
Leaend
Hvd• Origin
Description
1 SCS Runoff
PRE 1
2 SCS Runoff
PRE 2
3 SCS Runoff
POST 1
4 Reservoir
BIORETENTION
5 SCS Runoff
POST BYPASS 1
6 SCS Runoff
PRE 4
7 SCS Runoff
PRE 5
8 SCS Runoff
POST BYPASS 2
9 SCS Runoff
POST BYPASS 3
10 SCS Runoff
POST 2
11 Combine
POST TO POND
12 Reservoir
DETENTION
13 SCS Runoff
PRE 3
14 SCS Runoff
POST BYPASS 4
15 SCS Runoff
POST OFFSITE
16 SCS Runoff
PRE OFFSITE
17 SCS Runoff
POST BYPASS 5
18 Combine
PRE TOTAL
19 Combine
POSTSUBTOTAL
20 Combine
POST TOTAL
Project: BIORET & DET POND - TYPE Il.gpw
Thursday, 09 / 19 / 2019

Hydrograph Return Period Regd ��
Hydra w Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd.
Hydrograph
Inflow
Peak Outflow (cfs)
Hydrograph
No.
type
hyd(s)
Description
(origin)
1-yr
2-yr
3-yr
5-yr
10-yr
25-yr
50-yr
100-yr
1
SCS Runoff
------
0.715
1.219
-------
2.088
2.832
3.931
4.846
5.838
PRE 1
2
SCS Runoff
------
1.540
2.370
-------
3.751
4.902
6.611
8.011
9.485
PRE 2
3
SCS Runoff
------
1.535
2.219
-------
3.340
4.260
5.577
6.636
7.742
POST 1
4
Reservoir
3
0.000
0.000
-------
0.017
0.720
2.108
3.280
4.232
BIORETENTION
5
SCS Runoff
------
0.173
0.329
-------
0.605
0.844
1.204
1.504
1.824
POST BYPASS 1
6
SCS Runoff
------
0.145
0.198
-------
0.280
0.345
0.437
0.510
0.585
PRE 4
7
SCS Runoff
------
0.112
0.174
-------
0.276
0.361
0.486
0.591
0.701
PRE 5
8
SCS Runoff
------
1.747
2.265
-------
3.054
3.672
4.530
5.207
5.905
POST BYPASS 2
9
SCS Runoff
------
0.112
0.174
-------
0.276
0.361
0.486
0.591
0.701
POST BYPASS 3
10
SCS Runoff
------
0.094
0.199
-------
0.388
0.554
0.806
1.017
1.244
POST 2
11
Combine
4, 10
0.094
0.199
-------
0.388
0.773
2.202
3.402
4.399
POST TO POND
12
Reservoir
11
0.004
0.007
-------
0.018
0.080
0.126
0.151
0.430
DETENTION
13
SCS Runoff
------
0.268
0.438
-------
0.727
0.972
1.331
1.629
1.952
PRE 3
14
SCS Runoff
------
0.248
0.301
-------
0.381
0.444
0.531
0.600
0.672
POST BYPASS 4
15
SCS Runoff
------
0.791
0.959
-------
1.215
1.414
1.692
1.912
2.140
POST OFFSITE
16
SCS Runoff
------
0.791
0.959
-------
1.215
1.414
1.692
1.912
2.140
PRE OFFSITE
17
SCS Runoff
------
0.027
0.057
-------
0.111
0.158
0.230
0.291
0.355
POST BYPASS 5
18
Combine
1, 2, 6,
3.457
5.238
-------
8.246
10.77
14.46
17.47
20.66
PRE TOTAL
7, 13, 16,
19
Combine
5, 8, 9,
3.087
4.072
-------
5.624
6.874
8.648
10.07
11.56
POST SUBTOTAL
14, 15, 17,
20
Combine
12, 19
3.087
4.074
-------
5.630
6.883
8.667
10.10
11.60
POST TOTAL
Proj. file: BIORET & DET POND - TYPE Il.gpw
Thursday, 09 / 19 / 2019

Hydrograph Summary Repo rtHydraflowHydrographsExtension for Autodesk® Civil 3D®2019byAutodesk,Inc. v202O
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
Peak
(min)
Hyd.
volume
(cuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cuft)
Hydrograph
Description
1
SCS Runoff
0.715
2
720
1,848
------
------
------
PRE 1
2
SCS Runoff
1.540
2
720
3,664
------
------
------
PRE 2
3
SCS Runoff
1.535
2
728
5,503
------
------
------
POST 1
4
Reservoir
0.000
2
1244
0
3
229.85
2,363
BIORETENTION
5
SCS Runoff
0.173
2
718
421
------
------
------
POST BYPASS 1
6
SCS Runoff
0.145
2
718
293
------
------
------
PRE 4
7
SCS Runoff
0.112
2
718
231
------
------
------
PRE 5
8
SCS Runoff
1.747
2
718
4,028
------
------
------
POST BYPASS 2
9
SCS Runoff
0.112
2
718
231
------
------
------
POST BYPASS 3
10
SCS Runoff
0.094
2
718
256
------
------
------
POST 2
11
Combine
0.094
2
718
256
4, 10
------
------
POST TO POND
12
Reservoir
0.004
2
1044
226
11
220.04
120
DETENTION
13
SCS Runoff
0.268
2
718
570
------
------
------
PRE 3
14
SCS Runoff
0.248
2
716
579
------
------
------
POST BYPASS 4
15
SCS Runoff
0.791
2
718
2,060
------
------
------
POST OFFSITE
16
SCS Runoff
0.791
2
718
2,060
------
------
------
PRE OFFSITE
17
SCS Runoff
0.027
2
718
73
------
------
------
POST BYPASS 5
18
Combine
3.457
2
720
8,665
1, 2, 6,
------
------
PRE TOTAL
7, 13, 16,
19
Combine
3.087
2
718
7,392
5, 8, 9,
------
------
POST SUBTOTAL
14, 15, 17,
20
Combine
3.087
2
718
7,618
12,19
------
------
POST TOTAL
BIORET & DET POND - TYPE Il.gpw
Return Period: 1 Year
Thursday, 09 / 19 / 2019

4
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 1
PRE 1
Hydrograph type
= SCS Runoff
Peak discharge
= 0.715 cfs
Storm frequency
= 1 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 1,848 cuft
Drainage area
= 0.880 ac
Curve number
= 66
Basin Slope
= 5.8 %
Hydraulic length
= 294 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.30 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
PRE 1
Hyd. No. 1 -- 1 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 1 Time (min)

Hydrograph Report
5
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 2
PRE 2
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 1 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 1.260 ac
Curve number
Basin Slope
= 3.3 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 3.07 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
PRE 2
Hyd. No. 2 -- 1 Year
120 240 360 480 600 720 840 960
Hyd No. 2
Thursday, 09 / 19 / 2019
= 1.540 cfs
= 720 min
= 3,664 cuft
= 71
= 305 ft
= 8.80 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

Hydrograph Report
0
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 3
POST 1
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 1 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 1.330 ac
Curve number
Basin Slope
= 1.0 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 3.07 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST 1
Hyd. No. 3 -- 1 Year
120 240 360 480 600 720 840 960
Hyd No. 3
Thursday, 09 / 19 / 2019
= 1.535 cfs
= 728 min
= 5,503 cuft
= 77
= 544 ft
= 21.30 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

Hydrograph
Report
7
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 4
BIORETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.000 cfs
Storm frequency
= 1 yrs
Time to peak
= 1244 min
Time interval
= 2 min
Hyd. volume
= 0 cuft
Inflow hyd. No.
= 3 - POST 1
Max. Elevation
= 229.85 ft
Reservoir name
= BIORETENTION
Max. Storage
= 2,363 cuft
Storage Indication method used. Exfiltration extracted from Outflow
Q (cfs)
2.00
1.00
BIORETENTION
Hyd. No. 4 -- 1 Year
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 4 Hyd No. 3 Total storage used = 2,363 cuft
Q (cfs)
2.00
1.00
0.00
1440
Time (min)

Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 5
POST BYPASS 1
Hydrograph type
= SCS Runoff
Peak discharge
= 0.173 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 421 cuft
Drainage area
= 0.290 ac
Curve number
= 62
Basin Slope
= 25.5 %
Hydraulic length
= 47 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 1
Hyd. No. 5 -- 1 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 5 Time (min)

Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 6
PRE 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.145 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 293 cuft
Drainage area
= 0.060 ac
Curve number
= 82
Basin Slope
= 1.8 %
Hydraulic length
= 112 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.80 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 4
Hyd. No. 6 -- 1 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 6 Time (min)

10
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 7
PRE 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.112 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 231 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 4.0 %
Hydraulic length
= 82 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 5
Hyd. No. 7 -- 1 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 7 Time (min)

Hydrograph Report
11
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 8
POST BYPASS 2
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 1 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.590 ac
Curve number
Basin Slope
= 2.4 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 3.07 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST BYPASS 2
Hyd. No. 8 -- 1 Year
120 240 360 480 600 720 840 960
Hyd No. 8
Thursday, 09 / 19 / 2019
= 1.747 cfs
= 718 min
= 4,028 cuft
= 88
= 375 ft
= 7.10 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

12
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 9
POST BYPASS 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.112 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 231 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 3
Hyd. No. 9 -- 1 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 9 Time (min)

13
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 10
POST 2
Hydrograph type
= SCS Runoff
Peak discharge
= 0.094 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 256 cuft
Drainage area
= 0.210 ac
Curve number
= 60
Basin Slope
= 10.0 %
Hydraulic length
= 131 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.40 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
POST 2
Hyd. No. 10 -- 1 Year
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 10 Time (min)

Hydrograph
Report
14
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 11
POST TO POND
Hydrograph type
= Combine
Peak discharge
= 0.094 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 256 cuft
Inflow hyds.
= 4, 10
Contrib. drain. area
= 0.210 ac
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
POST TO POND
Hyd. No. 11 -- 1 Year
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 11 — Hyd No. 4 Hyd No. 10

15
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 12
DETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.004 cfs
Storm frequency
= 1 yrs
Time to peak
= 1044 min
Time interval
= 2 min
Hyd. volume
= 226 cuft
Inflow hyd. No.
= 11 - POST TO POND
Max. Elevation
= 220.04 ft
Reservoir name
= DETENTION
Max. Storage
= 120 cuft
Storage Indication method used.
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
DETENTION
Hyd. No. 12 -- 1 Year
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
1111y:
0.01
0.00
2160
Time (min)

16
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 13
PRE 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.268 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 570 cuft
Drainage area
= 0.270 ac
Curve number
= 67
Basin Slope
= 3.9 %
Hydraulic length
= 159 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.30 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 3
Hyd. No. 13 -- 1 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 13 Time (min)

17
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 14
POST BYPASS 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.248 cfs
Storm frequency
= 1 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 579 cuft
Drainage area
= 0.060 ac
Curve number
= 98
Basin Slope
= 0.0 %
Hydraulic length
= 0 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0 00
0
120 240
Hyd No. 14
POST BYPASS 4
Hyd. No. 14 -- 1 Year
Q (cfs)

18
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 15
POST OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
= 0.791 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 2,060 cuft
Drainage area
= 0.200 ac
Curve number
= 98
Basin Slope
= 0.9 %
Hydraulic length
= 345 ft
Tc method
= LAG
Time of conc. (Tc)
= 6.90 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
POST OFFSITE
Hyd. No. 15 -- 1 Year Q (cfs)
0
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 15 Time (min)

19
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 16
PRE OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
= 0.791 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 2,060 cuft
Drainage area
= 0.200 ac
Curve number
= 98
Basin Slope
= 0.9 %
Hydraulic length
= 345 ft
Tc method
= LAG
Time of conc. (Tc)
= 6.90 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
PRE OFFSITE
Hyd. No. 16 -- 1 Year Q (cfs)
0
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 16 Time (min)

20
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 17
POST BYPASS 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.027 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 73 cuft
Drainage area
= 0.060 ac
Curve number
= 60
Basin Slope
= 4.2 %
Hydraulic length
= 143 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.60 min
Total precip.
= 3.07 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
POST BYPASS 5
Hyd. No. 17 -- 1 Year
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 17 Time (min)

Hydrograph
Report
21
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 18
PRE TOTAL
Hydrograph type
= Combine
Peak discharge
= 3.457 cfs
Storm frequency
= 1 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 8,665 cuft
Inflow hyds.
= 1, 2, 6, 7, 13, 16
Contrib. drain. area
= 2.760 ac
PRE TOTAL
Q (cfs) Hyd. No. 18 -- 1 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 18 Hyd No. 1 Hyd No. 2 Hyd No. 6 Time (min)
Hyd No. 7 Hyd No. 13 Hyd No. 16

Hydrograph
Report
22
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 19
POST SUBTOTAL
Hydrograph type
= Combine
Peak discharge
= 3.087 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 7,392 cuft
Inflow hyds.
= 5, 8, 9, 14, 15, 17
Contrib. drain. area
= 1.290 ac
POST SUBTOTAL
Q (cfs) Hyd. No. 19 -- 1 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 19 Hyd No. 5 Hyd No. 8 Hyd No. 9 Time (min)
Hyd No. 14 Hyd No. 15 Hyd No. 17

Hydrograph
Report
23
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 20
POST TOTAL
Hydrograph type
= Combine
Peak discharge
= 3.087 cfs
Storm frequency
= 1 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 7,618 cuft
Inflow hyds.
= 12, 19
Contrib. drain. area
= 0.000 ac
POST TOTAL
Q (cfs) Hyd. No. 20 -- 1 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
— Hyd No. 20 — Hyd No. 12 Hyd No. 19

24
Hydrograph Summary Repo rtHydraflowHydrographsExtension for Autodesk® Civil 3D®2019byAutodesk,Inc. v202O
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
Peak
(min)
Hyd.
volume
(cuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cuft)
Hydrograph
Description
1
SCS Runoff
1.219
2
720
2,929
------
------
------
PRE 1
2
SCS Runoff
2.370
2
720
5,487
------
------
------
PRE 2
3
SCS Runoff
2.219
2
728
7,805
------
------
------
POST 1
4
Reservoir
0.000
2
838
0
3
230.02
3,500
BIORETENTION
5
SCS Runoff
0.329
2
718
707
------
------
------
POST BYPASS 1
6
SCS Runoff
0.198
2
716
400
------
------
------
PRE 4
7
SCS Runoff
0.174
2
718
349
------
------
------
PRE 5
8
SCS Runoff
2.265
2
718
5,271
------
------
------
POST BYPASS 2
9
SCS Runoff
0.174
2
718
349
------
------
------
POST BYPASS 3
10
SCS Runoff
0.199
2
718
446
------
------
------
POST 2
11
Combine
0.199
2
718
446
4, 10
------
------
POST TO POND
12
Reservoir
0.007
2
954
416
11
220.08
217
DETENTION
13
SCS Runoff
0.438
2
718
892
------
------
------
PRE 3
14
SCS Runoff
0.301
2
716
710
------
------
------
POST BYPASS 4
15
SCS Runoff
0.959
2
718
2,523
------
------
------
POST OFFSITE
16
SCS Runoff
0.959
2
718
2,523
------
------
------
PRE OFFSITE
17
SCS Runoff
0.057
2
718
128
------
------
------
POST BYPASS 5
18
Combine
5.238
2
718
12,580
1, 2, 6,
------
------
PRE TOTAL
7, 13, 16,
19
Combine
4.072
2
718
9,688
5, 8, 9,
------
------
POST SUBTOTAL
14, 15, 17,
20
Combine
4.074
2
718
10,103
12,19
------
------
POST TOTAL
BIORET & DET POND - TYPE Il.gpw
Return Period: 2 Year
Thursday, 09 / 19 / 2019

Hydrograph Report
25
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 1
PRE 1
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 2 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.880 ac
Curve number
Basin Slope
= 5.8 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 3.71 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
PRE 1
Hyd. No. 1 -- 2 Year
120 240 360 480 600 720 840 960
Hyd No. 1
Thursday, 09 / 19 / 2019
= 1.219 cfs
= 720 min
= 2,929 cuft
= 66
= 294 ft
= 7.30 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

Hydrograph
Report
26
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 2
PRE 2
Hydrograph type
= SCS Runoff
Peak discharge
= 2.370 cfs
Storm frequency
= 2 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 5,487 cuft
Drainage area
= 1.260 ac
Curve number
= 71
Basin Slope
= 3.3 %
Hydraulic length
= 305 ft
Tc method
= LAG
Time of conc. (Tc)
= 8.80 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
PRE 2
Q (cfs) Hyd. No. 2 -- 2 Year Q (cfs)
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 2 Time (min)

Hydrograph
Report
27
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 3
POST 1
Hydrograph type
= SCS Runoff
Peak discharge
= 2.219 cfs
Storm frequency
= 2 yrs
Time to peak
= 728 min
Time interval
= 2 min
Hyd. volume
= 7,805 cuft
Drainage area
= 1.330 ac
Curve number
= 77
Basin Slope
= 1.0 %
Hydraulic length
= 544 ft
Tc method
= LAG
Time of conc. (Tc)
= 21.30 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
POST 1
Q (cfs) Hyd. No. 3 -- 2 Year Q (cfs)
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 3 Time (min)

Hydrograph
Report
28
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 4
BIORETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.000 cfs
Storm frequency
= 2 yrs
Time to peak
= 838 min
Time interval
= 2 min
Hyd. volume
= 0 cuft
Inflow hyd. No.
= 3 - POST 1
Max. Elevation
= 230.02 ft
Reservoir name
= BIORETENTION
Max. Storage
= 3,500 cuft
Storage Indication method used. Exfiltration extracted from Outflow
BIORETENTION
Q (cfs) Hyd. No. 4 -- 2 Year Q (cfs)
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
— Hyd No. 4 Hyd No. 3 Total storage used = 3,500 cult

29
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 5
POST BYPASS 1
Hydrograph type
= SCS Runoff
Peak discharge
= 0.329 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 707 cuft
Drainage area
= 0.290 ac
Curve number
= 62
Basin Slope
= 25.5 %
Hydraulic length
= 47 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 1
Hyd. No. 5 -- 2 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 5 Time (min)

Hydrograph
Report
30
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 6
PRE 4
Hydrograph type = SCS Runoff Peak discharge
Storm frequency = 2 yrs Time to peak
Time interval = 2 min Hyd. volume
Drainage area = 0.060 ac Curve number
Basin Slope = 1.8 % Hydraulic length
Tc method = LAG Time of conc. (Tc)
Total precip. = 3.71 in Distribution
Storm duration = 24 hrs Shape factor
Thursday, 09 / 19 / 2019
= 0.198 cfs
= 716 min
= 400 cuft
= 82
= 112 ft
= 3.80 min
= Type II
= 484
Q (cfs)
PRE 4
Hyd. No. 6 -- 2 Year
Q (cfs)
0.50
0.50
0.45
0.45
0.40
0.40
0.35
0.35
0.30
0.30
0.25
0.25
0.20
0.20
0.15
0.15
0.10
0.10
0.05
0.05
0.00
0 120
Hyd No.
240 360 480 600 720 840 960 1080
6
0.00
1200 1320 1440
Time (min)

31
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 7
PRE 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.174 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 349 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 4.0 %
Hydraulic length
= 82 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 5
Hyd. No. 7 -- 2 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 7 Time (min)

Hydrograph
Report
32
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 8
POST BYPASS 2
Hydrograph type
= SCS Runoff
Peak discharge
= 2.265 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 5,271 cuft
Drainage area
= 0.590 ac
Curve number
= 88
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.10 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
POST BYPASS 2
Q (cfs) Hyd. No. 8 -- 2 Year Q (cfs)
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440
Hyd No. 8 Time (min)

33
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 9
POST BYPASS 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.174 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 349 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 3
Hyd. No. 9 -- 2 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 9 Time (min)

34
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 10
POST 2
Hydrograph type
= SCS Runoff
Peak discharge
= 0.199 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 446 cuft
Drainage area
= 0.210 ac
Curve number
= 60
Basin Slope
= 10.0 %
Hydraulic length
= 131 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.40 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST 2
Hyd. No. 10 -- 2 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 10 Time (min)

Hydrograph
Report
35
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 11
POST TO POND
Hydrograph type
= Combine
Peak discharge
= 0.199 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 446 cuft
Inflow hyds.
= 4, 10
Contrib. drain. area
= 0.210 ac
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST TO POND
Hyd. No. 11 -- 2 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 11 — Hyd No. 4 Hyd No. 10

36
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 12
DETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.007 cfs
Storm frequency
= 2 yrs
Time to peak
= 954 min
Time interval
= 2 min
Hyd. volume
= 416 cuft
Inflow hyd. No.
= 11 - POST TO POND
Max. Elevation
= 220.08 ft
Reservoir name
= DETENTION
Max. Storage
= 217 cuft
Storage Indication method used.
DETENTION

37
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 13
PRE 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.438 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 892 cuft
Drainage area
= 0.270 ac
Curve number
= 67
Basin Slope
= 3.9 %
Hydraulic length
= 159 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.30 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 3
Hyd. No. 13 -- 2 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 13 Time (min)

38
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 14
POST BYPASS 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.301 cfs
Storm frequency
= 2 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 710 cuft
Drainage area
= 0.060 ac
Curve number
= 98
Basin Slope
= 0.0 %
Hydraulic length
= 0 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
POST BYPASS 4
Hyd. No. 14 -- 2 Year
Q (cfs)
MI
WIIIIIIIIIIIIIII
0
120 240
Hyd No. 14
360 480 600 720 840 960
1080 1200
Time (min)

39
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 15
POST OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
= 0.959 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 2,523 cuft
Drainage area
= 0.200 ac
Curve number
= 98
Basin Slope
= 0.9 %
Hydraulic length
= 345 ft
Tc method
= LAG
Time of conc. (Tc)
= 6.90 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0 00
0 120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 15 Time (min)

40
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 16
PRE OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
= 0.959 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 2,523 cuft
Drainage area
= 0.200 ac
Curve number
= 98
Basin Slope
= 0.9 %
Hydraulic length
= 345 ft
Tc method
= LAG
Time of conc. (Tc)
= 6.90 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0 00
0 120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 16 Time (min)

41
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 17
POST BYPASS 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.057 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 128 cuft
Drainage area
= 0.060 ac
Curve number
= 60
Basin Slope
= 4.2 %
Hydraulic length
= 143 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.60 min
Total precip.
= 3.71 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
POST BYPASS 5
Hyd. No. 17 -- 2 Year
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 17 Time (min)

Hydrograph
Report
42
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 18
PRE TOTAL
Hydrograph type
= Combine
Peak discharge
= 5.238 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 12,580 cuft
Inflow hyds.
= 1, 2, 6, 7, 13, 16
Contrib. drain. area
= 2.760 ac
Q (cfs)
6.00
5.00
4.00
3.00
r M
1.00
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 18 Hyd No. 1 Hyd No. 2 Hyd No. 6 Time (min)
Hyd No. 7 Hyd No. 13 Hyd No. 16

Hydrograph
Report
43
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 19
POST SUBTOTAL
Hydrograph type
= Combine
Peak discharge
= 4.072 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 9,688 cuft
Inflow hyds.
= 5, 8, 9, 14, 15, 17
Contrib. drain. area
= 1.290 ac
POST SUBTOTAL
Q (cfs) Hyd. No. 19 -- 2 Year Q (cfs)
5.00 5.00
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 19 Hyd No. 5 Hyd No. 8 Hyd No. 9 Time (min)
Hyd No. 14 Hyd No. 15 Hyd No. 17

Hydrograph
Report
44
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 20
POST TOTAL
Hydrograph type
= Combine
Peak discharge
= 4.074 cfs
Storm frequency
= 2 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 10,103 cuft
Inflow hyds.
= 12, 19
Contrib. drain. area
= 0.000 ac
POST TOTAL
Q (cfs) Hyd. No. 20 -- 2 Year Q (cfs)
5.00 5.00
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
— Hyd No. 20 — Hyd No. 12 Hyd No. 19

45
Hydrograph Summary Repo rtHydraflowHydrographsExtension for Autodesk® Civil 3D®2019byAutodesk,Inc. v202O
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
Peak
(min)
Hyd.
volume
(cuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cuft)
Hydrograph
Description
1
SCS Runoff
2.088
2
720
4,835
------
------
------
PRE 1
2
SCS Runoff
3.751
2
720
8,588
------
------
------
PRE 2
3
SCS Runoff
3.340
2
726
11,586
------
------
------
POST 1
4
Reservoir
0.017
2
780
47
3
230.32
5,711
BIORETENTION
5
SCS Runoff
0.605
2
718
1,229
------
------
------
POST BYPASS 1
6
SCS Runoff
0.280
2
716
571
------
------
------
PRE 4
7
SCS Runoff
0.276
2
718
552
------
------
------
PRE 5
8
SCS Runoff
3.054
2
718
7,209
------
------
------
POST BYPASS 2
9
SCS Runoff
0.276
2
718
552
------
------
------
POST BYPASS 3
10
SCS Runoff
0.388
2
718
799
------
------
------
POST 2
11
Combine
0.388
2
718
847
4,10
------
------
POST TO POND
12
Reservoir
0.018
2
832
816
11
220.15
425
DETENTION
13
SCS Runoff
0.727
2
718
1,455
------
------
------
PRE 3
14
SCS Runoff
0.381
2
716
907
------
------
------
POST BYPASS 4
15
SCS Runoff
1.215
2
718
3,226
------
------
------
POST OFFSITE
16
SCS Runoff
1.215
2
718
3,226
------
------
------
PRE OFFSITE
17
SCS Runoff
0.111
2
718
228
------
------
------
POST BYPASS 5
18
Combine
8.246
2
718
19,227
1, 2, 6,
------
------
PRE TOTAL
7, 13, 16,
19
Combine
5.624
2
718
13,351
5, 8, 9,
------
------
POST SUBTOTAL
14, 15, 17,
20
Combine
5.630
2
718
14,167
12,19
------
------
POST TOTAL
BIORET & DET POND - TYPE Il.gpw
Return Period: 5 Year
Thursday, 09 / 19 / 2019

Hydrograph
Report
46
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 1
PRE 1
Hydrograph type
= SCS Runoff
Peak discharge
= 2.088 cfs
Storm frequency
= 5 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 4,835 cuft
Drainage area
= 0.880 ac
Curve number
= 66
Basin Slope
= 5.8 %
Hydraulic length
= 294 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.30 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
PRE 1
Q (cfs) Hyd. No. 1 -- 5 Year Q (cfs)
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 1 Time (min)

Hydrograph
Report
47
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 2
PRE 2
Hydrograph type
= SCS Runoff
Peak discharge
= 3.751 cfs
Storm frequency
= 5 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 8,588 cuft
Drainage area
= 1.260 ac
Curve number
= 71
Basin Slope
= 3.3 %
Hydraulic length
= 305 ft
Tc method
= LAG
Time of conc. (Tc)
= 8.80 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
PRE 2
Q (cfs) Hyd. No. 2 -- 5 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 2 Time (min)

Hydrograph
Report
48
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 3
POST 1
Hydrograph type
= SCS Runoff
Peak discharge
= 3.340 cfs
Storm frequency
= 5 yrs
Time to peak
= 726 min
Time interval
= 2 min
Hyd. volume
= 11,586 cuft
Drainage area
= 1.330 ac
Curve number
= 77
Basin Slope
= 1.0 %
Hydraulic length
= 544 ft
Tc method
= LAG
Time of conc. (Tc)
= 21.30 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
POST 1
Q (cfs) Hyd. No. 3 -- 5 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
-- Fk
::j
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 3 Time (min)

Hydrograph
Report
49
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 4
BIORETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.017 cfs
Storm frequency
= 5 yrs
Time to peak
= 780 min
Time interval
= 2 min
Hyd. volume
= 47 cuft
Inflow hyd. No.
= 3 - POST 1
Max. Elevation
= 230.32 ft
Reservoir name
= BIORETENTION
Max. Storage
= 5,711 cuft
Storage Indication method used. Exfiltration extracted from Outflow
Q (cfs)
4.00
3.00
r M
1.00
0.00 ' 1
0 120
— Hyd No. 4
BIORETENTION
Hyd. No. 4 -- 5 Year
240 360 480 600 720
Hyd No. 3 Total storage used = 5,711 cuft
Q (cfs)
4.00
3.00
2.00
1.00
'- 0.00
840
Time (min)

50
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 5
POST BYPASS 1
Hydrograph type
= SCS Runoff
Peak discharge
= 0.605 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 1,229 cuft
Drainage area
= 0.290 ac
Curve number
= 62
Basin Slope
= 25.5 %
Hydraulic length
= 47 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
POST BYPASS 1
Hyd. No. 5 -- 5 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 5 Time (min)

Hydrograph
Report
51
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 6
PRE 4
Hydrograph type = SCS Runoff Peak discharge
Storm frequency = 5 yrs Time to peak
Time interval = 2 min Hyd. volume
Drainage area = 0.060 ac Curve number
Basin Slope = 1.8 % Hydraulic length
Tc method = LAG Time of conc. (Tc)
Total precip. = 4.68 in Distribution
Storm duration = 24 hrs Shape factor
Thursday, 09 / 19 / 2019
= 0.280 cfs
= 716 min
= 571 cuft
= 82
= 112 ft
= 3.80 min
= Type II
= 484
Q (cfs)
0.50
PRE 4
Hyd. No. 6 -- 5 Year
Q (cfs)
0.50
0.45
0.45
0.40
0.40
0.35
0.35
0.30
0.30
0.25
0.25
0.20
0.20
0.15
0.15
0.10
0.10
0.05
0.05
0.00
0 120
Hyd No.
240 360 480 600 720 840 960 1080
6
0.00
1200 1320 1440
Time (min)

52
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 7
PRE 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.276 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 552 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 4.0 %
Hydraulic length
= 82 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 5
Hyd. No. 7 -- 5 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 7 Time (min)

Hydrograph
Report
53
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 8
POST BYPASS 2
Hydrograph type
= SCS Runoff
Peak discharge
= 3.054 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 7,209 cuft
Drainage area
= 0.590 ac
Curve number
= 88
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.10 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
POST BYPASS 2
Q (cfs) Hyd. No. 8 -- 5 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440
— Hyd No. 8 Time (min)

54
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 9
POST BYPASS 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.276 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 552 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 3
Hyd. No. 9 -- 5 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 9 Time (min)

55
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 10
POST 2
Hydrograph type
= SCS Runoff
Peak discharge
= 0.388 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 799 cuft
Drainage area
= 0.210 ac
Curve number
= 60
Basin Slope
= 10.0 %
Hydraulic length
= 131 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.40 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST 2
Hyd. No. 10 -- 5 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 10 Time (min)

Hydrograph
Report
56
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 11
POST TO POND
Hydrograph type
= Combine
Peak discharge
= 0.388 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 847 cuft
Inflow hyds.
= 4, 10
Contrib. drain. area
= 0.210 ac
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST TO POND
Hyd. No. 11 -- 5 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 11 — Hyd No. 4 Hyd No. 10

57
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 12
DETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.018 cfs
Storm frequency
= 5 yrs
Time to peak
= 832 min
Time interval
= 2 min
Hyd. volume
= 816 cuft
Inflow hyd. No.
= 11 - POST TO POND
Max. Elevation
= 220.15 ft
Reservoir name
= DETENTION
Max. Storage
= 425 cuft
Storage Indication method used.
DETENTION

58
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 13
PRE 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.727 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 1,455 cuft
Drainage area
= 0.270 ac
Curve number
= 67
Basin Slope
= 3.9 %
Hydraulic length
= 159 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.30 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
PRE 3
Hyd. No. 13 -- 5 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 13 Time (min)

59
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 14
POST BYPASS 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.381 cfs
Storm frequency
= 5 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 907 cuft
Drainage area
= 0.060 ac
Curve number
= 98
Basin Slope
= 0.0 %
Hydraulic length
= 0 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0 00
0
120 240
Hyd No. 14
POST BYPASS 4
Hyd. No. 14 -- 5 Year
Q (cfs)

Hydrograph Report
.E
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 15
POST OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 5 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 4.68 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST OFFSITE
Hyd. No. 15 -- 5 Year
Thursday, 09 / 19 / 2019
= 1.215 cfs
= 718 min
= 3,226 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 15
Q (cfs)
2.00
1.00
0.00
1320
Time (min)

Hydrograph Report
61
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 16
PRE OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 5 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 4.68 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
PRE OFFSITE
Hyd. No. 16 -- 5 Year
Thursday, 09 / 19 / 2019
= 1.215 cfs
= 718 min
= 3,226 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 16
Q (cfs)
2.00
1.00
0.00
1320
Time (min)

62
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 17
POST BYPASS 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.111 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 228 cuft
Drainage area
= 0.060 ac
Curve number
= 60
Basin Slope
= 4.2 %
Hydraulic length
= 143 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.60 min
Total precip.
= 4.68 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 5
Hyd. No. 17 -- 5 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 17 Time (min)

Hydrograph
Report
63
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 18
PRE TOTAL
Hydrograph type
= Combine
Peak discharge
= 8.246 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 19,227 cuft
Inflow hyds.
= 1, 2, 6, 7, 13, 16
Contrib. drain. area
= 2.760 ac
Q (cfs)
10.00
UR
. 0M
4.00
r M
M
120 240 360
Hyd No. 18
PRE TOTAL
Hyd. No. 18 -- 5 Year
480 600
Hyd No. 1
Hyd No. 7
720
Q (cfs)
10.00
H. We
4.00
r M
1 1 It
840 960 1080 1200 1320 1440 1560
Hyd No. 2 Hyd No. 6 Time (min)
Hyd No. 13 Hyd No. 16

Hydrograph
Report
64
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 19
POST SUBTOTAL
Hydrograph type
= Combine
Peak discharge
= 5.624 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 13,351 cuft
Inflow hyds.
= 5, 8, 9, 14, 15, 17
Contrib. drain. area
= 1.290 ac
POST SUBTOTAL
Q (cfs) Hyd. No. 19 -- 5 Year Q (cfs)
6.00 6.00
5.00 5.00
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440
— Hyd No. 19 Hyd No. 5 Hyd No. 8 Hyd No. 9 Time (min)
— Hyd No. 14 Hyd No. 15 Hyd No. 17

Hydrograph
Report
65
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 20
POST TOTAL
Hydrograph type
= Combine
Peak discharge
= 5.630 cfs
Storm frequency
= 5 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 14,167 cuft
Inflow hyds.
= 12, 19
Contrib. drain. area
= 0.000 ac
Q (cfs)
6.00
5.00
4.00
3.00
r M
1.00
POST TOTAL
Hyd. No. 20 -- 5 Year
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
0.00 1 1 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
— Hyd No. 20 — Hyd No. 12 Hyd No. 19

Hydrograph Summary Repo rtHydraflowHydrographsExtension for Autodesk® Civil 3D®2019byAutodesk,Inc. v202O
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
Peak
(min)
Hyd.
volume
(cuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cuft)
Hydrograph
Description
1
SCS Runoff
2.832
2
720
6,497
------
------
------
PRE 1
2
SCS Runoff
4.902
2
720
11,227
------
------
------
PRE 2
3
SCS Runoff
4.260
2
726
14,718
------
------
------
POST 1
4
Reservoir
0.720
2
750
1,835
3
230.47
6,793
BIORETENTION
5
SCS Runoff
0.844
2
718
1,695
------
------
------
POST BYPASS 1
6
SCS Runoff
0.345
2
716
710
------
------
------
PRE 4
7
SCS Runoff
0.361
2
718
725
------
------
------
PRE 5
8
SCS Runoff
3.672
2
718
8,756
------
------
------
POST BYPASS 2
9
SCS Runoff
0.361
2
718
725
------
------
------
POST BYPASS 3
10
SCS Runoff
0.554
2
718
1,119
------
------
------
POST 2
11
Combine
0.773
2
750
2,954
4, 10
------
------
POST TO POND
12
Reservoir
0.080
2
826
2,923
11
220.76
2,087
DETENTION
13
SCS Runoff
0.972
2
718
1,944
------
------
------
PRE 3
14
SCS Runoff
0.444
2
716
1,062
------
------
------
POST BYPASS 4
15
SCS Runoff
1.414
2
718
3,777
------
------
------
POST OFFSITE
16
SCS Runoff
1.414
2
718
3,777
------
------
------
PRE OFFSITE
17
SCS Runoff
0.158
2
718
320
------
------
------
POST BYPASS 5
18
Combine
10.77
2
718
24,879
1, 2, 6,
------
------
PRE TOTAL
7, 13, 16,
19
Combine
6.874
2
718
16,335
5, 8, 9,
------
------
POST SUBTOTAL
14, 15, 17,
20
Combine
6.883
2
718
19,258
12,19
------
------
POST TOTAL
BIORET & DET POND - TYPE Il.gpw
Return Period: 10 Year
Thursday, 09 / 19 / 2019

Hydrograph
Report
67
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 1
PRE 1
Hydrograph type
= SCS Runoff
Peak discharge
= 2.832 cfs
Storm frequency
= 10 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 6,497 cuft
Drainage area
= 0.880 ac
Curve number
= 66
Basin Slope
= 5.8 %
Hydraulic length
= 294 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.30 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
PRE 1
Q (cfs) Hyd. No. 1 -- 10 Year Q (cfs)
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 1 Time (min)

Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 2
PRE 2
Hydrograph type
= SCS Runoff
Peak discharge
= 4.902 cfs
Storm frequency
= 10 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 11,227 cuft
Drainage area
= 1.260 ac
Curve number
= 71
Basin Slope
= 3.3 %
Hydraulic length
= 305 ft
Tc method
= LAG
Time of conc. (Tc)
= 8.80 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
5.00
4.00
3.00
1.00
PRE 2
Hyd. No. 2 -- 10 Year
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 2 Time (min)

Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 3
POST 1
Hydrograph type
= SCS Runoff
Peak discharge
= 4.260 cfs
Storm frequency
= 10 yrs
Time to peak
= 726 min
Time interval
= 2 min
Hyd. volume
= 14,718 cuft
Drainage area
= 1.330 ac
Curve number
= 77
Basin Slope
= 1.0 %
Hydraulic length
= 544 ft
Tc method
= LAG
Time of conc. (Tc)
= 21.30 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
5.00
4.00
3.00
1.00
POST 1
Hyd. No. 3 -- 10 Year
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 3 Time (min)

Hydrograph
Report
70
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 4
BIORETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.720 cfs
Storm frequency
= 10 yrs
Time to peak
= 750 min
Time interval
= 2 min
Hyd. volume
= 1,835 cuft
Inflow hyd. No.
= 3 - POST 1
Max. Elevation
= 230.47 ft
Reservoir name
= BIORETENTION
Max. Storage
= 6,793 cuft
Storage Indication method used. Exfiltration extracted from Outflow
Q (cfs)
5.00
4.00
3.00
1.00
BIORETENTION
Hyd. No. 4 -- 10 Year
0.00 1 1 1 mr-- -� I ■
0 120 240 360 480 600 720 840
— Hyd No. 4 Hyd No. 3 Total storage used = 6,793 cuft
Q (cfs)
5.00
4.00
3.00
2.00
1.00
• '- 0.00
960
Time (min)

71
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 5
POST BYPASS 1
Hydrograph type
= SCS Runoff
Peak discharge
= 0.844 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 1,695 cuft
Drainage area
= 0.290 ac
Curve number
= 62
Basin Slope
= 25.5 %
Hydraulic length
= 47 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
POST BYPASS 1
Hyd. No. 5 -- 10 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 5 Time (min)

72
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 6
PRE 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.345 cfs
Storm frequency
= 10 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 710 cuft
Drainage area
= 0.060 ac
Curve number
= 82
Basin Slope
= 1.8 %
Hydraulic length
= 112 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.80 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
PRE 4
Hyd. No. 6 -- 10 Year Q (cfs)
0
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 6 Time (min)

73
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 7
PRE 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.361 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 725 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 4.0 %
Hydraulic length
= 82 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 5
Hyd. No. 7 -- 10 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 7 Time (min)

Hydrograph Report
74
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 8
POST BYPASS 2
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 10 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.590 ac
Curve number
Basin Slope
= 2.4 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 5.44 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
4.00
3.00
rM
1.00
0.00 1 ---J—
0 120 240
— Hyd No. 8
POST BYPASS 2
Hyd. No. 8 -- 10 Year
360 480 600 720 840 960
Thursday, 09 / 19 / 2019
= 3.672 cfs
= 718 min
= 8,756 cuft
= 88
= 375 ft
= 7.10 min
= Type II
= 484
Q (cfs)
4.00
3.00
2.00
1.00
0.00
1080 1200 1320 1440
Time (min)

75
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 9
POST BYPASS 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.361 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 725 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 3
Hyd. No. 9 -- 10 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 9 Time (min)

76
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 10
POST 2
Hydrograph type
= SCS Runoff
Peak discharge
= 0.554 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 1,119 cuft
Drainage area
= 0.210 ac
Curve number
= 60
Basin Slope
= 10.0 %
Hydraulic length
= 131 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.40 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
POST 2
Hyd. No. 10 -- 10 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 10 Time (min)

Hydrograph
Report
77
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 11
POST TO POND
Hydrograph type
= Combine
Peak discharge
= 0.773 cfs
Storm frequency
= 10 yrs
Time to peak
= 750 min
Time interval
= 2 min
Hyd. volume
= 2,954 cuft
Inflow hyds.
= 4, 10
Contrib. drain. area
= 0.210 ac
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
POST TO POND
Hyd. No. 11 -- 10 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440
Time (min)
Hyd No. 11 Hyd No. 4 Hyd No. 10

78
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 12
DETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.080 cfs
Storm frequency
= 10 yrs
Time to peak
= 826 min
Time interval
= 2 min
Hyd. volume
= 2,923 cuft
Inflow hyd. No.
= 11 - POST TO POND
Max. Elevation
= 220.76 ft
Reservoir name
= DETENTION
Max. Storage
= 2,087 cuft
Storage Indication method used.
DETENTION
1
Adr`.��������
1 �1 �:1 1 •.1 11 �1 .:1 • 1 •1 �11 .�1 ::1

79
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 13
PRE 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.972 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 1,944 cuft
Drainage area
= 0.270 ac
Curve number
= 67
Basin Slope
= 3.9 %
Hydraulic length
= 159 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.30 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
PRE 3
Hyd. No. 13 -- 10 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 13 Time (min)

80
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 14
POST BYPASS 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.444 cfs
Storm frequency
= 10 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 1,062 cuft
Drainage area
= 0.060 ac
Curve number
= 98
Basin Slope
= 0.0 %
Hydraulic length
= 0 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
POST BYPASS 4
Hyd. No. 14 -- 10 Year
Q (cfs)
■1
■I
0
120 240
Hyd No. 14
360 480 600 720 840 960
1080 1200
Time (min)

Hydrograph Report
81
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 15
POST OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 10 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 5.44 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST OFFSITE
Hyd. No. 15 -- 10 Year
Thursday, 09 / 19 / 2019
= 1.414 cfs
= 718 min
= 3,777 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 15
Q (cfs)
2.00
1.00
0.00
1320
Time (min)

Hydrograph Report
82
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 16
PRE OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 10 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 5.44 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
PRE OFFSITE
Hyd. No. 16 -- 10 Year
Thursday, 09 / 19 / 2019
= 1.414 cfs
= 718 min
= 3,777 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 16
Q (cfs)
2.00
1.00
0.00
1320
Time (min)

83
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 17
POST BYPASS 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.158 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 320 cuft
Drainage area
= 0.060 ac
Curve number
= 60
Basin Slope
= 4.2 %
Hydraulic length
= 143 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.60 min
Total precip.
= 5.44 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 5
Hyd. No. 17 -- 10 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 17 Time (min)

Hydrograph
Report
84
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 18
PRE TOTAL
Hydrograph type
= Combine
Peak discharge
= 10.77 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 24,879 cuft
Inflow hyds.
= 1, 2, 6, 7, 13, 16
Contrib. drain. area
= 2.760 ac
Q (cfs)
12.00
10.00
M
M
4.00
r M�
M
PRE TOTAL
Hyd. No. 18 -- 10 Year
Q (cfs)
12.00
10.00
M
. ��
4.00
r M�
1 1 It
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 18 Hyd No. 1 Hyd No. 2 Hyd No. 6 Time (min)
Hyd No. 7 Hyd No. 13 Hyd No. 16

Hydrograph
Report
85
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 19
POST SUBTOTAL
Hydrograph type
= Combine
Peak discharge
= 6.874 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 16,335 cuft
Inflow hyds.
= 5, 8, 9, 14, 15, 17
Contrib. drain. area
= 1.290 ac
POST SUBTOTAL
.1 MIS 1 1 •.1 1M 11 1 1

Hydrograph
Report
86
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 20
POST TOTAL
Hydrograph type
= Combine
Peak discharge
= 6.883 cfs
Storm frequency
= 10 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 19,258 cuft
Inflow hyds.
= 12, 19
Contrib. drain. area
= 0.000 ac
Q (cfs)
7.00
. Me
5.00
3.00
1.00
Q (cfs)
7.00
. We
5.00
4.00
3.00
2.00
1.00
0.00 i0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
— Hyd No. 20 — Hyd No. 12 Hyd No. 19

87
Hydrograph Summary Repo rtHydraflowHydrographsExtension for Autodesk® Civil 3D®2019byAutodesk,Inc. v202O
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
Peak
(min)
Hyd.
volume
(cuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cuft)
Hydrograph
Description
1
SCS Runoff
3.931
2
720
8,998
------
------
------
PRE 1
2
SCS Runoff
6.611
2
718
15,124
------
------
------
PRE 2
3
SCS Runoff
5.577
2
726
19,260
------
------
------
POST 1
4
Reservoir
2.108
2
742
4,944
3
230.62
7,945
BIORETENTION
5
SCS Runoff
1.204
2
718
2,407
------
------
------
POST BYPASS 1
6
SCS Runoff
0.437
2
716
909
------
------
------
PRE 4
7
SCS Runoff
0.486
2
716
982
------
------
------
PRE 5
8
SCS Runoff
4.530
2
718
10,941
------
------
------
POST BYPASS 2
9
SCS Runoff
0.486
2
716
982
------
------
------
POST BYPASS 3
10
SCS Runoff
0.806
2
718
1,612
------
------
------
POST 2
11
Combine
2.202
2
742
6,557
4, 10
------
------
POST TO POND
12
Reservoir
0.126
2
838
6,526
11
221.69
5,142
DETENTION
13
SCS Runoff
1.331
2
718
2,677
------
------
------
PRE 3
14
SCS Runoff
0.531
2
716
1,278
------
------
------
POST BYPASS 4
15
SCS Runoff
1.692
2
718
4,546
------
------
------
POST OFFSITE
16
SCS Runoff
1.692
2
718
4,546
------
------
------
PRE OFFSITE
17
SCS Runoff
0.230
2
718
461
------
------
------
POST BYPASS 5
18
Combine
14.46
2
718
33,235
1, 2, 6,
------
------
PRE TOTAL
7, 13, 16,
19
Combine
8.648
2
718
20,616
5, 8, 9,
------
------
POST SUBTOTAL
14, 15, 17,
20
Combine
8.667
2
718
27,142
12,19
------
------
POST TOTAL
BIORET & DET POND - TYPE Il.gpw
Return Period: 25 Year
Thursday, 09 / 19 / 2019

Hydrograph
Report
88
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 1
PRE 1
Hydrograph type
= SCS Runoff
Peak discharge
= 3.931 cfs
Storm frequency
= 25 yrs
Time to peak
= 720 min
Time interval
= 2 min
Hyd. volume
= 8,998 cuft
Drainage area
= 0.880 ac
Curve number
= 66
Basin Slope
= 5.8 %
Hydraulic length
= 294 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.30 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
PRE 1
Q (cfs) Hyd. No. 1 -- 25 Year Q (cfs)
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 1 Time (min)

Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 2
PRE 2
Hydrograph type
= SCS Runoff
Peak discharge
= 6.611 cfs
Storm frequency
= 25 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 15,124 cuft
Drainage area
= 1.260 ac
Curve number
= 71
Basin Slope
= 3.3 %
Hydraulic length
= 305 ft
Tc method
= LAG
Time of conc. (Tc)
= 8.80 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
7.00
5.00
3.00
1.00
PRE 2
Hyd. No. 2 -- 25 Year
Q (cfs)
7.00
. We
5.00
4.00
3.00
2.00
1.00
0.00 ' .1 ' ' ' ' 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 2 Time (min)

9
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 3
POST 1
Hydrograph type
= SCS Runoff
Peak discharge
= 5.577 cfs
Storm frequency
= 25 yrs
Time to peak
= 726 min
Time interval
= 2 min
Hyd. volume
= 19,260 cuft
Drainage area
= 1.330 ac
Curve number
= 77
Basin Slope
= 1.0 %
Hydraulic length
= 544 ft
Tc method
= LAG
Time of conc. (Tc)
= 21.30 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
6.00
5.00
4.00
3.00
r M
1.00
POST 1
Hyd. No. 3 -- 25 Year
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
0.00 1 1 1 1 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 3 Time (min)

91
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 4
BIORETENTION
Hydrograph type
= Reservoir
Peak discharge
= 2.108 cfs
Storm frequency
= 25 yrs
Time to peak
= 742 min
Time interval
= 2 min
Hyd. volume
= 4,944 cuft
Inflow hyd. No.
= 3 - POST 1
Max. Elevation
= 230.62 ft
Reservoir name
= BIORETENTION
Max. Storage
= 7,945 cuft
Storage Indication method used. Exfiltration extracted from Outflow.
Q (cfs)
6.00
5.00
4.00
3.00
rM
1.00
0.00
0 120
— Hyd No. 4
BIORETENTION
Hyd. No. 4 -- 25 Year
240 360
Hyd No. 3
480 600 720 840
Total storage used = 7,945 cuft
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
1 0.00
960
Time (min)

Hydrograph Report
92
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 5
POST BYPASS 1
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 25 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.290 ac
Curve number
Basin Slope
= 25.5 %
Hydraulic length
Tc method
= User
Time of conc. (Tc)
Total precip.
= 6.50 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST BYPASS 1
Hyd. No. 5 -- 25 Year
120 240 360 480 600 720 840 960
Hyd No. 5
Thursday, 09 / 19 / 2019
= 1.204 cfs
= 718 min
= 2,407 cuft
= 62
= 47 ft
= 3.10 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

93
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 6
PRE 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.437 cfs
Storm frequency
= 25 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 909 cuft
Drainage area
= 0.060 ac
Curve number
= 82
Basin Slope
= 1.8 %
Hydraulic length
= 112 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.80 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
PRE 4
Hyd. No. 6 -- 25 Year Q (cfs)
Ell
0
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 6 Time (min)

94
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 7
PRE 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.486 cfs
Storm frequency
= 25 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 982 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 4.0 %
Hydraulic length
= 82 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
PRE 5
Hyd. No. 7 -- 25 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 7 Time (min)

95
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 8
POST BYPASS 2
Hydrograph type
= SCS Runoff
Peak discharge
= 4.530 cfs
Storm frequency
= 25 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 10,941 cuft
Drainage area
= 0.590 ac
Curve number
= 88
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.10 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
5.00
4.00
3.00
1.00
0.00 '
0 120 240
— Hyd No. 8
POST BYPASS 2
Hyd. No. 8 -- 25 Year
360 480 600 720 840
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00
960 1080 1200 1320
Time (min)

Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 9
POST BYPASS 3
Hydrograph type
= SCS Runoff
Peak discharge
= 0.486 cfs
Storm frequency
= 25 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 982 cuft
Drainage area
= 0.090 ac
Curve number
= 70
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 3
Hyd. No. 9 -- 25 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 9 Time (min)

97
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 10
POST 2
Hydrograph type
= SCS Runoff
Peak discharge
= 0.806 cfs
Storm frequency
= 25 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 1,612 cuft
Drainage area
= 0.210 ac
Curve number
= 60
Basin Slope
= 10.0 %
Hydraulic length
= 131 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.40 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
POST 2
Hyd. No. 10 -- 25 Year
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 10 Time (min)

Hydrograph
Report
98
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 11
POST TO POND
Hydrograph type
= Combine
Peak discharge
= 2.202 cfs
Storm frequency
= 25 yrs
Time to peak
= 742 min
Time interval
= 2 min
Hyd. volume
= 6,557 cuft
Inflow hyds.
= 4, 10
Contrib. drain. area
= 0.210 ac
Q (cfs)
3.00
r M
1.00
e
POST TO POND
Hyd. No. 11 -- 25 Year
120 240 360
Hyd No. 11 Hyd No. 4
480 600
Hyd No. 10
720 840
Q (cfs)
3.00
2.00
1.00
Mok- 0.00
960
Time (min)

Hydrograph
Report
99
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 12
DETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.126 cfs
Storm frequency
= 25 yrs
Time to peak
= 838 min
Time interval
= 2 min
Hyd. volume
= 6,526 cuft
Inflow hyd. No.
= 11 - POST TO POND
Max. Elevation
= 221.69 ft
Reservoir name
= DETENTION
Max. Storage
= 5,142 cuft
Storage Indication method used
Q (cfs)
3.00
r M
1.00
e
DETENTION
Hyd. No. 12 -- 25 Year
360 720 1080 1440 1800 2160 2520 2880
Hyd No. 12 Hyd No. 11 Total storage used = 5,142 cuft
Q (cfs)
3.00
2.00
1.00
1 0.00
3240
Time (min)

Hydrograph Report
100
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 13
PRE 3
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 25 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.270 ac
Curve number
Basin Slope
= 3.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 6.50 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
PRE 3
Hyd. No. 13 -- 25 Year
120 240 360 480 600 720 840 960
Hyd No. 13
Thursday, 09 / 19 / 2019
= 1.331 cfs
= 718 min
= 2,677 cuft
= 67
= 159 ft
= 5.30 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

101
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 14
POST BYPASS 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.531 cfs
Storm frequency
= 25 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 1,278 cuft
Drainage area
= 0.060 ac
Curve number
= 98
Basin Slope
= 0.0 %
Hydraulic length
= 0 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
POST BYPASS 4
Hyd. No. 14 -- 25 Year
Q (cfs)
.
MI
■I
0
120 240
Hyd No. 14
360 480 600 720 840 960
1080 1200
Time (min)

Hydrograph Report
102
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 15
POST OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 25 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 6.50 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
e
POST OFFSITE
Hyd. No. 15 -- 25 Year
Thursday, 09 / 19 / 2019
= 1.692 cfs
= 718 min
= 4,546 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 15
Q (cfs)
2.00
1.00
--" 0.00
1320
Time (min)

Hydrograph Report
103
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 16
PRE OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 25 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 6.50 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
e
PRE OFFSITE
Hyd. No. 16 -- 25 Year
Thursday, 09 / 19 / 2019
= 1.692 cfs
= 718 min
= 4,546 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 16
Q (cfs)
2.00
1.00
--" 0.00
1320
Time (min)

104
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 17
POST BYPASS 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.230 cfs
Storm frequency
= 25 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 461 cuft
Drainage area
= 0.060 ac
Curve number
= 60
Basin Slope
= 4.2 %
Hydraulic length
= 143 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.60 min
Total precip.
= 6.50 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 5
Hyd. No. 17 -- 25 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 17 Time (min)

Hydrograph
Report
105
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 18
PRE TOTAL
Hydrograph type
= Combine
Peak discharge
= 14.46 cfs
Storm frequency
= 25 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 33,235 cuft
Inflow hyds.
= 1, 2, 6, 7, 13, 16
Contrib. drain. area
= 2.760 ac
PRE TOTAL
Q (cfs) Hyd. No. 18 -- 25 Year Q (cfs)
15.00 15.00
12.00
12.00
9.00
6.00
9.00
6.00
3.00
3.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 18 Hyd No. 1 Hyd No. 2 Hyd No. 6 Time (min)
Hyd No. 7 Hyd No. 13 Hyd No. 16

Hydrograph
Report
106
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 19
POST SUBTOTAL
Hydrograph type
= Combine
Peak discharge
= 8.648 cfs
Storm frequency
= 25 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 20,616 cuft
Inflow hyds.
= 5, 8, 9, 14, 15, 17
Contrib. drain. area
= 1.290 ac
Q (cfs)
10.00
UR
. 0M
4.00
r M
M
120 240
Hyd No. 19
POST SUBTOTAL
Hyd. No. 19 -- 25 Year
360 480 600
Hyd No. 5
— Hyd No. 14
720 840 960
Hyd No. 8
Hyd No. 15
Q (cfs)
10.00
H. We
4.00
r M
1 1 It
1080 1200 1320 1440
Hyd No. 9 Time (min)
Hyd No. 17

Hydrograph
Report
107
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 20
POST TOTAL
Hydrograph type
= Combine
Peak discharge
= 8.667 cfs
Storm frequency
= 25 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 27,142 cuft
Inflow hyds.
= 12, 19
Contrib. drain. area
= 0.000 ac
Q (cfs)
10.00
UR
. 0M
4.00
r M
M
POST TOTAL
Hyd. No. 20 -- 25 Year
120 240 360 480 600 720
Hyd No. 20 Hyd No. 12
Q (cfs)
10.00
H. We
4.00
r M
0.00
840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 19

108
Hydrograph Summary Repo rtHydraflowHydrographsExtension for Autodesk® Civil 3D®2019byAutodesk,Inc. v202O
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
Peak
(min)
Hyd.
volume
(cuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cuft)
Hydrograph
Description
1
SCS Runoff
4.846
2
718
11,096
------
------
------
PRE 1
2
SCS Runoff
8.011
2
718
18,347
------
------
------
PRE 2
3
SCS Runoff
6.636
2
726
22,962
------
------
------
POST 1
4
Reservoir
3.280
2
740
7,577
3
230.72
8,725
BIORETENTION
5
SCS Runoff
1.504
2
718
3,013
------
------
------
POST BYPASS 1
6
SCS Runoff
0.510
2
716
1,069
------
------
------
PRE 4
7
SCS Runoff
0.591
2
716
1,195
------
------
------
PRE 5
8
SCS Runoff
5.207
2
718
12,688
------
------
------
POST BYPASS 2
9
SCS Runoff
0.591
2
716
1,195
------
------
------
POST BYPASS 3
10
SCS Runoff
1.017
2
718
2,035
------
------
------
POST 2
11
Combine
3.402
2
740
9,612
4,10
------
------
POST TO POND
12
Reservoir
0.151
2
846
9,581
11
222.38
7,776
DETENTION
13
SCS Runoff
1.629
2
716
3,290
------
------
------
PRE 3
14
SCS Runoff
0.600
2
716
1,450
------
------
------
POST BYPASS 4
15
SCS Runoff
1.912
2
718
5,155
------
------
------
POST OFFSITE
16
SCS Runoff
1.912
2
718
5,155
------
------
------
PRE OFFSITE
17
SCS Runoff
0.291
2
718
581
------
------
------
POST BYPASS 5
18
Combine
17.47
2
718
40,152
1, 2, 6,
------
------
PRE TOTAL
7, 13, 16,
19
Combine
10.07
2
718
24,083
5, 8, 9,
------
------
POST SUBTOTAL
14, 15, 17,
20
Combine
10.10
2
718
33,664
12,19
------
------
POST TOTAL
BIORET & DET POND - TYPE Il.gpw
Return Period: 50 Year
Thursday, 09 / 19 / 2019

109
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 1
PRE 1
Hydrograph type
= SCS Runoff
Peak discharge
= 4.846 cfs
Storm frequency
= 50 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 11,096 cuft
Drainage area
= 0.880 ac
Curve number
= 66
Basin Slope
= 5.8 %
Hydraulic length
= 294 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.30 min
Total precip.
= 7.34 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
5.00
4.00
3.00
1.00
PRE 1
Hyd. No. 1 -- 50 Year
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0.00 - 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 1 Time (min)

110
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 2
PRE 2
Hydrograph type
= SCS Runoff
Peak discharge
= 8.011 cfs
Storm frequency
= 50 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 18,347 cuft
Drainage area
= 1.260 ac
Curve number
= 71
Basin Slope
= 3.3 %
Hydraulic length
= 305 ft
Tc method
= LAG
Time of conc. (Tc)
= 8.80 min
Total precip.
= 7.34 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
10.00
N. We
. UM
4.00
r w
M
PRE 2
Hyd. No. 2 -- 50 Year
Q (cfs)
10.00
N. We
4.00
r w
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 2 Time (min)

Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 3
POST 1
Hydrograph type
= SCS Runoff
Peak discharge
= 6.636 cfs
Storm frequency
= 50 yrs
Time to peak
= 726 min
Time interval
= 2 min
Hyd. volume
= 22,962 cuft
Drainage area
= 1.330 ac
Curve number
= 77
Basin Slope
= 1.0 %
Hydraulic length
= 544 ft
Tc method
= LAG
Time of conc. (Tc)
= 21.30 min
Total precip.
= 7.34 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
7.00
. Me
5.00
3.00
1.00
Q (cfs)
7.00
. We
5.00
4.00
3.00
2.00
1.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 3 Time (min)

112
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 4
BIORETENTION
Hydrograph type
= Reservoir
Peak discharge
= 3.280 cfs
Storm frequency
= 50 yrs
Time to peak
= 740 min
Time interval
= 2 min
Hyd. volume
= 7,577 cuft
Inflow hyd. No.
= 3 - POST 1
Max. Elevation
= 230.72 ft
Reservoir name
= BIORETENTION
Max. Storage
= 8,725 cuft
Storage Indication method used. Exfiltration extracted from Outflow.
Q (cfs)
BIORETENTION
Hyd. No. 4 -- 50 Year
Q (cfs)
7m
0 120
— Hyd No. 4
240 360
Hyd No. 3
480 600 720 840
Total storage used = 8,725 cuft
960
Time (min)

Hydrograph Report
113
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 5
POST BYPASS 1
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 50 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.290 ac
Curve number
Basin Slope
= 25.5 %
Hydraulic length
Tc method
= User
Time of conc. (Tc)
Total precip.
= 7.34 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST BYPASS 1
Hyd. No. 5 -- 50 Year
120 240 360 480 600 720 840 960
Hyd No. 5
Thursday, 09 / 19 / 2019
= 1.504 cfs
= 718 min
= 3,013 cuft
= 62
= 47 ft
= 3.10 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

114
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 6
PRE 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.510 cfs
Storm frequency
= 50 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 1,069 cuft
Drainage area
= 0.060 ac
Curve number
= 82
Basin Slope
= 1.8 %
Hydraulic length
= 112 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.80 min
Total precip.
= 7.34 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
PRE 4
Hyd. No. 6 -- 50 Year Q (cfs)
a as
0
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 6 Time (min)

Hydrograph
Report
115
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 7
PRE 5
Hydrograph type = SCS Runoff Peak discharge
Storm frequency = 50 yrs Time to peak
Time interval = 2 min Hyd. volume
Drainage area = 0.090 ac Curve number
Basin Slope = 4.0 % Hydraulic length
Tc method = User Time of conc. (Tc)
Total precip. = 7.34 in Distribution
Storm duration = 24 hrs Shape factor
Thursday, 09 / 19 / 2019
= 0.591 cfs
= 716 min
= 1,195 cuft
= 70
= 82 ft
= 3.10 min
= Type II
= 484
Q (cfs)
PRE 5
Hyd. No. 7 -- 50 Year
Q (cfs)
1.00
1.00
0.90
0.90
0.80
0.80
0.70
0.70
0.60
0.60
0.50
0.50
0.40
0.40
0.30
0.30
0.20
0.20
0.10
0.10
0.00
0 120
Hyd No.
11 OIE
240 360 480 600 720 840 960 1080
7
0.00
1200 1320 1440
Time (min)

116
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 8
POST BYPASS 2
Hydrograph type
= SCS Runoff
Peak discharge
= 5.207 cfs
Storm frequency
= 50 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 12,688 cuft
Drainage area
= 0.590 ac
Curve number
= 88
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.10 min
Total precip.
= 7.34 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
6.00
5.00
4.00
3.00
rM
1.00
POST BYPASS 2
Hyd. No. 8 -- 50 Year
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
0.00 ' 1 1-""'-- ' ' ' ' 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320
— Hyd No. 8 Time (min)

Hydrograph
Report
117
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 9
POST BYPASS 3
Hydrograph type = SCS Runoff Peak discharge
Storm frequency = 50 yrs Time to peak
Time interval = 2 min Hyd. volume
Drainage area = 0.090 ac Curve number
Basin Slope = 2.4 % Hydraulic length
Tc method = User Time of conc. (Tc)
Total precip. = 7.34 in Distribution
Storm duration = 24 hrs Shape factor
Thursday, 09 / 19 / 2019
= 0.591 cfs
= 716 min
= 1,195 cuft
= 70
= 375 ft
= 3.10 min
= Type II
= 484
Q (cfs)
1.00
POST BYPASS 3
Hyd. No. 9 -- 50 Year
Q (cfs)
1.00
0.90
0.90
0.80
0.80
0.70
0.70
0.60
0.60
0.50
0.50
0.40
0.40
0.30
0.30
0.20
0.20
K
0.10
0.10
0.00
0 120
Hyd No.
240 360 480 600 720 840 960 1080
9
0.00
1200 1320 1440
Time (min)

Hydrograph Report
118
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 10
POST 2
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 50 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.210 ac
Curve number
Basin Slope
= 10.0 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 7.34 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST 2
Hyd. No. 10 -- 50 Year
120 240 360 480 600 720 840 960
Hyd No. 10
Thursday, 09 / 19 / 2019
= 1.017 cfs
= 718 min
= 2,035 cuft
= 60
= 131 ft
= 3.40 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

Hydrograph
Report
119
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 11
POST TO POND
Hydrograph type
= Combine
Peak discharge
= 3.402 cfs
Storm frequency
= 50 yrs
Time to peak
= 740 min
Time interval
= 2 min
Hyd. volume
= 9,612 cuft
Inflow hyds.
= 4, 10
Contrib. drain. area
= 0.210 ac
Q (cfs)
4.00
3.00
r M
1.00
POST TO POND
Hyd. No. 11 -- 50 Year
0.00
0 120 240 360 480 600
— Hyd No. 11 Hyd No. 4 Hyd No. 10
720 840
Q (cfs)
4.00
3.00
2.00
1.00
ww-� 0.00
960
Time (min)

Hydrograph
Report
120
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 12
DETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.151 cfs
Storm frequency
= 50 yrs
Time to peak
= 846 min
Time interval
= 2 min
Hyd. volume
= 9,581 cuft
Inflow hyd. No.
= 11 - POST TO POND
Max. Elevation
= 222.38 ft
Reservoir name
= DETENTION
Max. Storage
= 7,776 cuft
Storage Indication method used
Q (cfs)
4.00
3.00
rM
1.00
0.00
0 360
— Hyd No. 12
DETENTION
Hyd. No. 12 -- 50 Year
720 1080 1440
Hyd No. 11
1800 2160 2520 2880 3240
Total storage used = 7,776 cuft
Q (cfs)
4.00
3.00
2.00
1.00
1 0.00
3600
Time (min)

Hydrograph Report
121
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 13
PRE 3
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 50 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.270 ac
Curve number
Basin Slope
= 3.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 7.34 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
PRE 3
Hyd. No. 13 -- 50 Year
120 240 360 480 600 720 840 960
Hyd No. 13
Thursday, 09 / 19 / 2019
= 1.629 cfs
= 716 min
= 3,290 cuft
= 67
= 159 ft
= 5.30 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

122
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 14
POST BYPASS 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.600 cfs
Storm frequency
= 50 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 1,450 cuft
Drainage area
= 0.060 ac
Curve number
= 98
Basin Slope
= 0.0 %
Hydraulic length
= 0 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 7.34 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
POST BYPASS 4
Hyd. No. 14 -- 50 Year
Q (cfs)
MI
-��-�
■I
MI
0
120 240
Hyd No. 14
360 480 600 720 840 960
1080 1200
Time (min)

Hydrograph Report
123
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 15
POST OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 50 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 7.34 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
e
POST OFFSITE
Hyd. No. 15 -- 50 Year
Thursday, 09 / 19 / 2019
= 1.912 cfs
= 718 min
= 5,155 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 15
Q (cfs)
2.00
1.00
— 0.00
1320
Time (min)

Hydrograph Report
124
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 16
PRE OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 50 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 7.34 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
e
PRE OFFSITE
Hyd. No. 16 -- 50 Year
Thursday, 09 / 19 / 2019
= 1.912 cfs
= 718 min
= 5,155 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200
Hyd No. 16
Q (cfs)
2.00
1.00
— 0.00
1320
Time (min)

125
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 17
POST BYPASS 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.291 cfs
Storm frequency
= 50 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 581 cuft
Drainage area
= 0.060 ac
Curve number
= 60
Basin Slope
= 4.2 %
Hydraulic length
= 143 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.60 min
Total precip.
= 7.34 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 5
Hyd. No. 17 -- 50 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 17 Time (min)

Hydrograph
Report
126
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 18
PRE TOTAL
Hydrograph type
= Combine
Peak discharge
= 17.47 cfs
Storm frequency
= 50 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 40,152 cuft
Inflow hyds.
= 1, 2, 6, 7, 13, 16
Contrib. drain. area
= 2.760 ac
Q (cfs)
18.00
15.00
12.00
M
M
3.00
M
PRE TOTAL
Hyd. No. 18 -- 50 Year
Q (cfs)
18.00
15.00
12.00
M
. ��
3.00
1 1 It
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 18 Hyd No. 1 Hyd No. 2 Hyd No. 6 Time (min)
Hyd No. 7 Hyd No. 13 Hyd No. 16

Hydrograph
Report
127
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 19
POST SUBTOTAL
Hydrograph type
= Combine
Peak discharge
= 10.07 cfs
Storm frequency
= 50 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 24,083 cuft
Inflow hyds.
= 5, 8, 9, 14, 15, 17
Contrib. drain. area
= 1.290 ac
Q (cfs)
12.00
10.00
M
M
4.00
r M�
M
120 240
Hyd No. 19
POST SUBTOTAL
Hyd. No. 19 -- 50 Year
360 480 600
Hyd No. 5
— Hyd No. 14
Q (cfs)
12.00
10.00
M
. ��
4.00
r M�
1 1 It
720 840 960 1080 1200 1320 1440
Hyd No. 8 Hyd No. 9 Time (min)
Hyd No. 15 Hyd No. 17

Hydrograph
Report
128
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 20
POST TOTAL
Hydrograph type
= Combine
Peak discharge
= 10.10 cfs
Storm frequency
= 50 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 33,664 cuft
Inflow hyds.
= 12, 19
Contrib. drain. area
= 0.000 ac
Q (cfs)
12.00
10.00
M
M
4.00
r M�
M
POST TOTAL
Hyd. No. 20 -- 50 Year
Q (cfs)
12.00
10.00
M
. ��
4.00
r M�
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Time (min)
Hyd No. 20 Hyd No. 12 Hyd No. 19

129
Hydrograph Summary Repo rtHydraflowHydrographsExtension for Autodesk® Civil 3D®2019byAutodesk,Inc. v202O
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
Peak
(min)
Hyd.
volume
(cuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cuft)
Hydrograph
Description
1
SCS Runoff
5.838
2
718
13,354
------
------
------
PRE 1
2
SCS Runoff
9.485
2
718
21,781
------
------
------
PRE 2
3
SCS Runoff
7.742
2
726
26,867
------
------
------
POST 1
4
Reservoir
4.232
2
734
10,425
3
230.83
9,501
BIORETENTION
5
SCS Runoff
1.824
2
718
3,671
------
------
------
POST BYPASS 1
6
SCS Runoff
0.585
2
716
1,237
------
------
------
PRE 4
7
SCS Runoff
0.701
2
716
1,423
------
------
------
PRE 5
8
SCS Runoff
5.905
2
718
14,507
------
------
------
POST BYPASS 2
9
SCS Runoff
0.701
2
716
1,423
------
------
------
POST BYPASS 3
10
SCS Runoff
1.244
2
718
2,495
------
------
------
POST 2
11
Combine
4.399
2
734
12,921
4,10
------
------
POST TO POND
12
Reservoir
0.430
2
810
12,890
11
222.94
10,141
DETENTION
13
SCS Runoff
1.952
2
716
3,947
------
------
------
PRE 3
14
SCS Runoff
0.672
2
716
1,627
------
------
------
POST BYPASS 4
15
SCS Runoff
2.140
2
718
5,786
------
------
------
POST OFFSITE
16
SCS Runoff
2.140
2
718
5,786
------
------
------
PRE OFFSITE
17
SCS Runoff
0.355
2
718
713
------
------
------
POST BYPASS 5
18
Combine
20.66
2
718
47,528
1, 2, 6,
------
------
PRE TOTAL
7, 13, 16,
19
Combine
11.56
2
718
27,727
5, 8, 9,
------
------
POST SUBTOTAL
14, 15, 17,
20
Combine
11.60
2
718
40,617
12,19
------
------
POST TOTAL
BIORET & DET POND - TYPE Il.gpw
Return Period: 100 Year
Thursday, 09 / 19 / 2019

130
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 1
PRE 1
Hydrograph type
= SCS Runoff
Peak discharge
= 5.838 cfs
Storm frequency
= 100 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 13,354 cuft
Drainage area
= 0.880 ac
Curve number
= 66
Basin Slope
= 5.8 %
Hydraulic length
= 294 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.30 min
Total precip.
= 8.21 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
6.00
5.00
4.00
3.00
rM
1.00
PRE 1
Hyd. No. 1 -- 100 Year
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
0.00 ' .I ' ' ' ' 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 1 Time (min)

131
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 2
PRE 2
Hydrograph type
= SCS Runoff
Peak discharge
= 9.485 cfs
Storm frequency
= 100 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 21,781 cuft
Drainage area
= 1.260 ac
Curve number
= 71
Basin Slope
= 3.3 %
Hydraulic length
= 305 ft
Tc method
= LAG
Time of conc. (Tc)
= 8.80 min
Total precip.
= 8.21 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
10.00
N. We
. UM
4.00
r w
M
PRE 2
Hyd. No. 2 -- 100 Year
Q (cfs)
10.00
N. We
4.00
r w
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 2 Time (min)

Hydrograph
Report
132
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 3
POST 1
Hydrograph type
= SCS Runoff
Peak discharge
= 7.742 cfs
Storm frequency
= 100 yrs
Time to peak
= 726 min
Time interval
= 2 min
Hyd. volume
= 26,867 cuft
Drainage area
= 1.330 ac
Curve number
= 77
Basin Slope
= 1.0 %
Hydraulic length
= 544 ft
Tc method
= LAG
Time of conc. (Tc)
= 21.30 min
Total precip.
= 8.21 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
POST 1
Q (cfs) Hyd. No. 3 -- 100 Year Q (cfs)
8.00 8.00
6.00 6.00
4.00 4.00
2.00 2.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 3 Time (min)

Hydrograph
Report
133
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 4
BIORETENTION
Hydrograph type
= Reservoir
Peak discharge
= 4.232 cfs
Storm frequency
= 100 yrs
Time to peak
= 734 min
Time interval
= 2 min
Hyd. volume
= 10,425 cuft
Inflow hyd. No.
= 3 - POST 1
Max. Elevation
= 230.83 ft
Reservoir name
= BIORETENTION
Max. Storage
= 9,501 cuft
Storage Indication method used. Exfiltration extracted from Outflow
Q (cfs)
8.00
M
4.00
I'm
0.00
0 120
— Hyd No. 4
BIORETENTION
Hyd. No. 4 -- 100 Year
240 360 480 600 720 840
Hyd No. 3 Total storage used = 9,501 cuft
Q (cfs)
8.00
. ��
4.00
r M�
0.00
960
Time (min)

Hydrograph Report
134
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 5
POST BYPASS 1
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 100 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.290 ac
Curve number
Basin Slope
= 25.5 %
Hydraulic length
Tc method
= User
Time of conc. (Tc)
Total precip.
= 8.21 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST BYPASS 1
Hyd. No. 5 -- 100 Year
120 240 360 480 600 720 840 960
Hyd No. 5
Thursday, 09 / 19 / 2019
= 1.824 cfs
= 718 min
= 3,671 cuft
= 62
= 47 ft
= 3.10 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

135
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 6
PRE 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.585 cfs
Storm frequency
= 100 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 1,237 cuft
Drainage area
= 0.060 ac
Curve number
= 82
Basin Slope
= 1.8 %
Hydraulic length
= 112 ft
Tc method
= LAG
Time of conc. (Tc)
= 3.80 min
Total precip.
= 8.21 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0 00
PRE 4
Hyd. No. 6 -- 100 Year
0 120 240 360 480 600 720 840 960
Hyd No. 6
Q (cfs)

Hydrograph
Report
136
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 7
PRE 5
Hydrograph type = SCS Runoff Peak discharge
Storm frequency = 100 yrs Time to peak
Time interval = 2 min Hyd. volume
Drainage area = 0.090 ac Curve number
Basin Slope = 4.0 % Hydraulic length
Tc method = User Time of conc. (Tc)
Total precip. = 8.21 in Distribution
Storm duration = 24 hrs Shape factor
Thursday, 09 / 19 / 2019
= 0.701 cfs
= 716 min
= 1,423 cuft
= 70
= 82 ft
= 3.10 min
= Type II
= 484
Q (cfs)
PRE 5
Hyd. No. 7 -- 100 Year
Q (cfs)
1.00
1.00
0.90
0.90
0.80
0.80
0.70
0.70
0.60
0.60
0.50
0.50
0.40
0.40
0.30
0.30
0.20
0.20
0.10
0.10
0.00
0 120
Hyd No.
240 360 480
7
600 720 840 960 1080
0.00
1200 1320 1440
Time (min)

137
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 8
POST BYPASS 2
Hydrograph type
= SCS Runoff
Peak discharge
= 5.905 cfs
Storm frequency
= 100 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 14,507 cuft
Drainage area
= 0.590 ac
Curve number
= 88
Basin Slope
= 2.4 %
Hydraulic length
= 375 ft
Tc method
= LAG
Time of conc. (Tc)
= 7.10 min
Total precip.
= 8.21 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
6.00
5.00
4.00
3.00
r M
1.00
POST BYPASS 2
Hyd. No. 8 -- 100 Year
Q (cfs)
6.00
5.00
4.00
3.00
2.00
1.00
0.00 i 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320
— Hyd No. 8 Time (min)

Hydrograph
Report
138
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 9
POST BYPASS 3
Hydrograph type = SCS Runoff Peak discharge
Storm frequency = 100 yrs Time to peak
Time interval = 2 min Hyd. volume
Drainage area = 0.090 ac Curve number
Basin Slope = 2.4 % Hydraulic length
Tc method = User Time of conc. (Tc)
Total precip. = 8.21 in Distribution
Storm duration = 24 hrs Shape factor
Thursday, 09 / 19 / 2019
= 0.701 cfs
= 716 min
= 1,423 cuft
= 70
= 375 ft
= 3.10 min
= Type II
= 484
Q (cfs)
1.00
POST BYPASS 3
Hyd. No. 9 -- 100 Year
Q (cfs)
1.00
0.90
0.90
0.80
0.80
0.70
0.70
0.60
0.60
0.50
0.50
0.40
0.40
0.30
0.30
0.20
0.20
0.10
0.10
0.00
0 120
Hyd No.
240 360 480
9
600 720 840 960 1080
0.00
1200 1320 1440
Time (min)

Hydrograph Report
139
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 10
POST 2
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 100 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.210 ac
Curve number
Basin Slope
= 10.0 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 8.21 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
POST 2
Hyd. No. 10 -- 100 Year
120 240 360 480 600 720 840 960
Hyd No. 10
Thursday, 09 / 19 / 2019
= 1.244 cfs
= 718 min
= 2,495 cuft
= 60
= 131 ft
= 3.40 min
= Type II
= 484
Q (cfs)
2.00
1.00
0.00
1080 1200 1320 1440 1560
Time (min)

Hydrograph
Report
140
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 11
POST TO POND
Hydrograph type
= Combine
Peak discharge
= 4.399 cfs
Storm frequency
= 100 yrs
Time to peak
= 734 min
Time interval
= 2 min
Hyd. volume
= 12,921 cuft
Inflow hyds.
= 4, 10
Contrib. drain. area
= 0.210 ac
POST TO POND
Q (cfs) Hyd. No. 11 -- 100 Year Q (cfs)
5.00 5.00
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 120 240 360 480 600 720 840 960
Time (min)
— Hyd No. 11 Hyd No. 4 Hyd No. 10

141
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 12
DETENTION
Hydrograph type
= Reservoir
Peak discharge
= 0.430 cfs
Storm frequency
= 100 yrs
Time to peak
= 810 min
Time interval
= 2 min
Hyd. volume
= 12,890 cuft
Inflow hyd. No.
= 11 - POST TO POND
Max. Elevation
= 222.94 ft
Reservoir name
= DETENTION
Max. Storage
= 10,141 cuft
Storage Indication method used.
DETENTION
Q (cfs) Hyd. No. 12 -- 100 Year Q (cfs)
5.00 5.00
4.00 4.00
3.00 3.00
2.00 2.00
1.00 1.00
0.00 0.00
0 360 720 1080 1440 1800 2160 2520 2880 3240
Time (min)
— Hyd No. 12 Hyd No. 11 Total storage used = 10,141 cult

Hydrograph Report
142
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 13
PRE 3
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 100 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.270 ac
Curve number
Basin Slope
= 3.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 8.21 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
2.00
1.00
M
PRE 3
Hyd. No. 13 -- 100 Year
Thursday, 09 / 19 / 2019
= 1.952 cfs
= 716 min
= 3,947 cuft
= 67
= 159 ft
= 5.30 min
= Type II
= 484
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 13
Q (cfs)
2.00
1.00
0.00
1440
Time (min)

143
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Hyd. No. 14
POST BYPASS 4
Hydrograph type
= SCS Runoff
Peak discharge
= 0.672 cfs
Storm frequency
= 100 yrs
Time to peak
= 716 min
Time interval
= 2 min
Hyd. volume
= 1,627 cuft
Drainage area
= 0.060 ac
Curve number
= 98
Basin Slope
= 0.0 %
Hydraulic length
= 0 ft
Tc method
= User
Time of conc. (Tc)
= 3.10 min
Total precip.
= 8.21 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
POST BYPASS 4
Hyd. No. 14 -- 100 Year
Q (cfs)
0
120 240
Hyd No. 14
360 480 600 720 840 960
1080 1200
Time (min)

Hydrograph Report
144
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 15
POST OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 100 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 8.21 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
3.00
r M
1.00
e
120 240
Hyd No. 15
POST OFFSITE
Hyd. No. 15 -- 100 Year
Thursday, 09 / 19 / 2019
= 2.140 cfs
= 718 min
= 5,786 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
360 480 600 720 840 960 1080 1200
Q (cfs)
3.00
2.00
1.00
-110 0.00
1320
Time (min)

Hydrograph Report
145
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Hyd. No. 16
PRE OFFSITE
Hydrograph type
= SCS Runoff
Peak discharge
Storm frequency
= 100 yrs
Time to peak
Time interval
= 2 min
Hyd. volume
Drainage area
= 0.200 ac
Curve number
Basin Slope
= 0.9 %
Hydraulic length
Tc method
= LAG
Time of conc. (Tc)
Total precip.
= 8.21 in
Distribution
Storm duration
= 24 hrs
Shape factor
Q (cfs)
3.00
r M
1.00
e
120 240
Hyd No. 16
PRE OFFSITE
Hyd. No. 16 -- 100 Year
Thursday, 09 / 19 / 2019
= 2.140 cfs
= 718 min
= 5,786 cuft
= 98
= 345 ft
= 6.90 min
= Type II
= 484
360 480 600 720 840 960 1080 1200
Q (cfs)
3.00
2.00
1.00
-110 0.00
1320
Time (min)

146
Hydrograph Report
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 17
POST BYPASS 5
Hydrograph type
= SCS Runoff
Peak discharge
= 0.355 cfs
Storm frequency
= 100 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 713 cuft
Drainage area
= 0.060 ac
Curve number
= 60
Basin Slope
= 4.2 %
Hydraulic length
= 143 ft
Tc method
= LAG
Time of conc. (Tc)
= 5.60 min
Total precip.
= 8.21 in
Distribution
= Type II
Storm duration
= 24 hrs
Shape factor
= 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
POST BYPASS 5
Hyd. No. 17 -- 100 Year
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
Hyd No. 17 Time (min)

Hydrograph
Report
147
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 18
PRE TOTAL
Hydrograph type
= Combine
Peak discharge
= 20.66 cfs
Storm frequency
= 100 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 47,528 cuft
Inflow hyds.
= 1, 2, 6, 7, 13, 16
Contrib. drain. area
= 2.760 ac
Q (cfs)
21.00
18.00
15.00
12.00
3.00
PRE TOTAL
Hyd. No. 18 -- 100 Year
Q (cfs)
21.00
18.00
15.00
12.00
3.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560
— Hyd No. 18 Hyd No. 1 Hyd No. 2 Hyd No. 6 Time (min)
Hyd No. 7 Hyd No. 13 Hyd No. 16

Hydrograph
Report
148
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk,
Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 19
POST SUBTOTAL
Hydrograph type
= Combine
Peak discharge
= 11.56 cfs
Storm frequency
= 100 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 27,727 cuft
Inflow hyds.
= 5, 8, 9, 14, 15, 17
Contrib. drain. area
= 1.290 ac
Q (cfs)
12.00
10.00
M
M
4.00
r M�
M
POST SUBTOTAL
Hyd. No. 19 -- 100 Year
Q (cfs)
12.00
10.00
M
. ��
4.00
r M�
1 1 It
120 240 360 480 600 720 840 960 1080 1200 1320
Hyd No. 19 Hyd No. 5 Hyd No. 8 Hyd No. 9 Time (min)
Hyd No. 14 Hyd No. 15 Hyd No. 17

Hydrograph
Report
149
Hydraflow Hydrographs Extension for Autodesk® Civil 3D® 2019 by Autodesk, Inc. v2020
Thursday, 09 / 19 / 2019
Hyd. No. 20
POST TOTAL
Hydrograph type
= Combine
Peak discharge
= 11.60 cfs
Storm frequency
= 100 yrs
Time to peak
= 718 min
Time interval
= 2 min
Hyd. volume
= 40,617 cuft
Inflow hyds.
= 12, 19
Contrib. drain. area
= 0.000 ac
POST TOTAL
Q (cfs) Hyd. No. 20 -- 100 Year Q (cfs)
12.00 12.00
10.00 10.00
8.00 8.00
6.00 6.00
4.00 4.00
2.00 2.00
0.00 0.00
0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680
Time (min)
Hyd No. 20 Hyd No. 12 Hyd No. 19

150
Hydraflow Rainfall Report
Hydraflow Hydrographs Extension for Autodesk0 Civil 3DO 2019 by Autodesk, Inc. v2020 Thursday, 09 / 19 / 2019
Return
Period
Intensity -Duration -Frequency Equation Coefficients (FHA)
(Yrs)
B
D
E
(N/A)
1
69.0574
12.9000
0.8960
--------
2
77.0598
12.9000
0.8772
--------
3
0.0000
0.0000
0.0000
--------
5
79.3048
12.8000
0.8361
--------
10
78.6305
12.4000
0.8044
--------
25
67.9775
11.0000
0.7384
--------
50
63.8674
10.3000
0.7025
--------
100
56.1060
9.1000
0.6530
--------
File name: Ft. Bragg, NC.IDF
Intensity = B / (Tc + D)^E
Return
Period
Intensity Values (in/hr)
(Yrs)
6 min
10
16
20
26
30
36
40
46
60
66
60
1
5.21
4.18
3.50
3.02
2.66
2.38
2.16
1.97
1.82
1.69
1.58
1.48
2
6.14
4.94
4.16
3.60
3.18
2.85
2.59
2.37
2.19
2.04
1.91
1.79
3
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
5
7.14
5.81
4.92
4.28
3.81
3.43
3.13
2.88
2.67
2.49
2.33
2.20
10
7.90
6.45
5.48
4.79
4.27
3.86
3.53
3.26
3.03
2.83
2.66
2.51
25
8.77
7.18
6.13
5.38
4.82
4.38
4.02
3.73
3.48
3.27
3.08
2.92
50
9.40
7.71
6.60
5.82
5.22
4.76
4.38
4.07
3.81
3.59
3.39
3.22
100
9.97
8.17
7.02
6.21
5.60
5.12
4.73
4.41
4.14
3.91
3.71
3.53
Tc = time in minutes. Values may exceed 60.
Precip. file name: Z:\_stan&det\IDF Curves\Hydraflow Hydrographs\Ft. Bragg, NC.pcp
Storm
Rainfall Precipitation Table (in)
Distribution
1-yr
2-yr
3-yr
6-yr
10-yr
26-yr
60-yr
100-yr
SCS 24-hour
3.07
3.71
0.00
4.68
5.44
6.50
7.34
8.21
SCS 6-Hr
2.20
2.66
0.00
3.35
3.90
4.65
5.26
5.91
Huff-1 st
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Huff-2nd
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Huff-3rd
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Huff-4th
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Huff-Indy
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Custom
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
<Name>
Circular
Diameter (ft)
= 1.50
Invert Elev (ft)
= 219.50
Slope (%)
= 7.77
N-Value
= 0.013
Calculations
Compute by:
Known Q
Known Q (cfs)
= 0.08
Elev (ft)
Thursday, Sep 19 2019
Highlighted
Depth (ft)
= 0.06
Q (cfs)
= 0.080
Area (sqft)
= 0.02
Velocity (ft/s)
= 3.32
Wetted Perim (ft)
= 0.61
Crit Depth, Yc (ft)
= 0.11
Top Width (ft)
= 0.59
EGL (ft)
= 0.23
Section
222.00
221.50
2.1
221.00
1.!
220.50
1.1
220.00
0.!
219.50
0.1
01 a M)
_n
0
2
Reach (ft)
3
4