CA NP GOGA 469 - 100_ Hydraulics.pdf

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11/17/2020 Precipitation Frequency Data Server https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=depth&units=english&series=pds#table 1/4

NOAA Atlas 14, Volume 6, Version 2 Location name: San Francisco, California, USA*

Latitude: 37.7874°, Longitude: -122.4905° Elevation: 92.24 ft**

* source: ESRI Maps ** source: USGS

POINT PRECIPITATION FREQUENCY ESTIMATES

Sanja Perica, Sarah Dietz, Sarah Heim, Lillian Hiner, Kazungu Maitaria, Deborah Martin, Sandra Pavlovic, Ishani Roy, Carl Trypaluk, Dale Unruh, Fenglin Yan, Michael Yekta, Tan Zhao, Geoffrey

Bonnin, Daniel Brewer, Li-Chuan Chen, Tye Parzybok, John Yarchoan

NOAA, National Weather Service, Silver Spring, Maryland

PF_tabular | PF_graphical | Maps_&_aerials

PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1

Duration Average recurrence interval (years)

1 2 5 10 25 50 100 200 500 1000

5-min 0.142 (0.127‑0.161)

0.174 (0.154‑0.197)

0.217 (0.192‑0.247)

0.253 (0.223‑0.291)

0.305 (0.257‑0.366)

0.347 (0.285‑0.427)

0.391 (0.312‑0.495)

0.438 (0.338‑0.574)

0.505 (0.370‑0.695)

0.558 (0.393‑0.802)

10-min 0.204 (0.181‑0.231)

0.249 (0.221‑0.282)

0.311 (0.276‑0.354)

0.363 (0.319‑0.418)

0.438 (0.369‑0.524)

0.497 (0.409‑0.612)

0.561 (0.447‑0.710)

0.628 (0.484‑0.823)

0.723 (0.530‑0.996)

0.800 (0.563‑1.15)

15-min 0.246 (0.219‑0.279)

0.301 (0.268‑0.341)

0.376 (0.333‑0.428)

0.439 (0.386‑0.505)

0.529 (0.446‑0.634)

0.602 (0.494‑0.740)

0.678 (0.541‑0.859)

0.759 (0.585‑0.995)

0.875 (0.641‑1.21)

0.968 (0.681‑1.39)

30-min 0.339 (0.302‑0.384)

0.414 (0.369‑0.470)

0.517 (0.459‑0.589)

0.605 (0.531‑0.696)

0.729 (0.614‑0.873)

0.828 (0.681‑1.02)

0.933 (0.744‑1.18)

1.05 (0.806‑1.37)

1.20 (0.883‑1.66)

1.33 (0.938‑1.91)

60-min 0.478 (0.426‑0.542)

0.584 (0.520‑0.663)

0.730 (0.647‑0.831)

0.853 (0.749‑0.981)

1.03 (0.866‑1.23)

1.17 (0.960‑1.44)

1.32 (1.05‑1.67)

1.48 (1.14‑1.93)

1.70 (1.25‑2.34)

1.88 (1.32‑2.70)

2-hr 0.685 (0.611‑0.777)

0.832 (0.741‑0.944)

1.03 (0.916‑1.18)

1.20 (1.06‑1.38)

1.44 (1.21‑1.73)

1.63 (1.34‑2.00)

1.83 (1.46‑2.32)

2.04 (1.58‑2.68)

2.34 (1.72‑3.23)

2.58 (1.82‑3.71)

3-hr 0.853 (0.761‑0.967)

1.03 (0.921‑1.18)

1.28 (1.14‑1.46)

1.49 (1.31‑1.72)

1.79 (1.51‑2.14)

2.02 (1.66‑2.48)

2.27 (1.81‑2.87)

2.53 (1.95‑3.32)

2.90 (2.13‑3.99)

3.20 (2.25‑4.59)

6-hr 1.17 (1.05‑1.33)

1.43 (1.27‑1.62)

1.78 (1.58‑2.03)

2.07 (1.82‑2.38)

2.48 (2.09‑2.98)

2.81 (2.31‑3.46)

3.16 (2.52‑4.00)

3.52 (2.72‑4.62)

4.04 (2.96‑5.56)

4.45 (3.13‑6.39)

12-hr 1.53 (1.36‑1.73)

1.89 (1.69‑2.15)

2.39 (2.12‑2.72)

2.81 (2.47‑3.24)

3.41 (2.88‑4.09)

3.89 (3.20‑4.78)

4.39 (3.50‑5.56)

4.93 (3.80‑6.46)

5.68 (4.17‑7.83)

6.29 (4.43‑9.03)

24-hr 1.99 (1.79‑2.25)

2.50 (2.25‑2.83)

3.20 (2.87‑3.64)

3.80 (3.38‑4.35)

4.64 (4.01‑5.48)

5.33 (4.51‑6.41)

6.05 (5.01‑7.45)

6.82 (5.50‑8.62)

7.91 (6.14‑10.4)

8.80 (6.62‑11.9)

2-day 2.52 (2.27‑2.86)

3.15 (2.84‑3.57)

4.01 (3.60‑4.56)

4.74 (4.22‑5.42)

5.76 (4.98‑6.80)

6.58 (5.58‑7.93)

7.45 (6.17‑9.17)

8.37 (6.76‑10.6)

9.67 (7.51‑12.7)

10.7 (8.06‑14.5)

3-day 2.88 (2.60‑3.26)

3.58 (3.22‑4.06)

4.52 (4.06‑5.14)

5.32 (4.74‑6.09)

6.44 (5.57‑7.61)

7.34 (6.22‑8.84)

8.28 (6.86‑10.2)

9.27 (7.48‑11.7)

10.7 (8.29‑14.0)

11.8 (8.87‑16.0)

4-day 3.20 (2.89‑3.63)

3.98 (3.58‑4.51)

5.02 (4.50‑5.70)

5.89 (5.25‑6.74)

7.11 (6.14‑8.39)

8.07 (6.84‑9.72)

9.08 (7.52‑11.2)

10.1 (8.19‑12.8)

11.6 (9.04‑15.3)

12.8 (9.65‑17.4)

7-day 3.98 (3.59‑4.51)

4.97 (4.47‑5.64)

6.28 (5.64‑7.14)

7.36 (6.56‑8.43)

8.83 (7.63‑10.4)

9.98 (8.46‑12.0)

11.2 (9.24‑13.7)

12.4 (9.99‑15.6)

14.1 (10.9‑18.5)

15.4 (11.6‑20.9)

10-day 4.52 (4.07‑5.12)

5.68 (5.11‑6.44)

7.19 (6.45‑8.16)

8.41 (7.49‑9.63)

10.1 (8.69‑11.9)

11.3 (9.59‑13.6)

12.6 (10.4‑15.5)

13.9 (11.2‑17.6)

15.7 (12.2‑20.6)

17.0 (12.8‑23.1)

20-day 5.95 (5.36‑6.74)

7.56 (6.80‑8.57)

9.59 (8.61‑10.9)

11.2 (9.97‑12.8)

13.3 (11.5‑15.7)

14.8 (12.6‑17.9)

16.4 (13.6‑20.2)

17.9 (14.4‑22.6)

19.9 (15.4‑26.1)

21.4 (16.1‑29.0)

30-day 7.26 (6.54‑8.22)

9.25 (8.33‑10.5)

11.7 (10.5‑13.3)

13.6 (12.2‑15.6)

16.1 (13.9‑19.0)

17.9 (15.2‑21.6)

19.7 (16.3‑24.2)

21.4 (17.2‑27.0)

23.6 (18.3‑31.0)

25.2 (18.9‑34.2)

45-day 8.92 (8.04‑10.1)

11.4 (10.2‑12.9)

14.3 (12.9‑16.3)

16.6 (14.8‑19.0)

19.5 (16.8‑23.0)

21.6 (18.3‑26.0)

23.5 (19.5‑29.0)

25.4 (20.5‑32.1)

27.8 (21.6‑36.5)

29.5 (22.2‑40.1)

60-day 10.7 (9.67‑12.2)

13.6 (12.3‑15.5)

17.1 (15.4‑19.5)

19.8 (17.6‑22.6)

23.0 (19.9‑27.2)

25.4 (21.5‑30.5)

27.6 (22.8‑34.0)

29.7 (24.0‑37.5)

32.3 (25.1‑42.4)

34.2 (25.7‑46.4)

1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).

Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.

Please refer to NOAA Atlas 14 document for more information.

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PF graphical

0.253 https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=depth&units=english&series=pds#table 2/4

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Maps & aerials

Small scale terrain https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=depth&units=english&series=pds#table 3/4

Large scale terrain

Large scale map

Large scale aerial

3km

2mi

100km

60mi

100km

60mi https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=depth&units=english&series=pds#table 4/4

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US Department of Commerce National Oceanic and Atmospheric Administration

National Weather Service National Water Center

1325 East West Highway Silver Spring, MD 20910

Questions?: HDSC.Questions@noaa.gov

Disclaimer https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=intensity&units=english&series=pds 1/4

NOAA Atlas 14, Volume 6, Version 2 Location name: San Francisco, California, USA*

Latitude: 37.7874°, Longitude: -122.4905° Elevation: 92.24 ft**

* source: ESRI Maps ** source: USGS

POINT PRECIPITATION FREQUENCY ESTIMATES

Sanja Perica, Sarah Dietz, Sarah Heim, Lillian Hiner, Kazungu Maitaria, Deborah Martin, Sandra Pavlovic, Ishani Roy, Carl Trypaluk, Dale Unruh, Fenglin Yan, Michael Yekta, Tan Zhao, Geoffrey

Bonnin, Daniel Brewer, Li-Chuan Chen, Tye Parzybok, John Yarchoan

NOAA, National Weather Service, Silver Spring, Maryland

PF_tabular | PF_graphical | Maps_&_aerials

PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1

Duration Average recurrence interval (years)

1 2 5 10 25 50 100 200 500 1000

5-min 1.70 (1.52‑1.93)

2.09 (1.85‑2.36)

2.60 (2.30‑2.96)

3.04 (2.68‑3.49)

3.66 (3.08‑4.39)

4.16 (3.42‑5.12)

4.69 (3.74‑5.94)

5.26 (4.06‑6.89)

6.06 (4.44‑8.34)

6.70 (4.72‑9.62)

10-min 1.22 (1.09‑1.39)

1.49 (1.33‑1.69)

1.87 (1.66‑2.12)

2.18 (1.91‑2.51)

2.63 (2.21‑3.14)

2.98 (2.45‑3.67)

3.37 (2.68‑4.26)

3.77 (2.90‑4.94)

4.34 (3.18‑5.98)

4.80 (3.38‑6.89)

15-min 0.984 (0.876‑1.12)

1.20 (1.07‑1.36)

1.50 (1.33‑1.71)

1.76 (1.54‑2.02)

2.12 (1.78‑2.54)

2.41 (1.98‑2.96)

2.71 (2.16‑3.44)

3.04 (2.34‑3.98)

3.50 (2.56‑4.82)

3.87 (2.72‑5.56)

30-min 0.678 (0.604‑0.768)

0.828 (0.738‑0.940)

1.03 (0.918‑1.18)

1.21 (1.06‑1.39)

1.46 (1.23‑1.75)

1.66 (1.36‑2.04)

1.87 (1.49‑2.36)

2.09 (1.61‑2.74)

2.41 (1.77‑3.32)

2.67 (1.88‑3.83)

60-min 0.478 (0.426‑0.542)

0.584 (0.520‑0.663)

0.730 (0.647‑0.831)

0.853 (0.749‑0.981)

1.03 (0.866‑1.23)

1.17 (0.960‑1.44)

1.32 (1.05‑1.67)

1.48 (1.14‑1.93)

1.70 (1.25‑2.34)

1.88 (1.32‑2.70)

2-hr 0.342 (0.306‑0.388)

0.416 (0.370‑0.472)

0.516 (0.458‑0.588)

0.600 (0.528‑0.690)

0.720 (0.606‑0.862)

0.815 (0.670‑1.00)

0.915 (0.730‑1.16)

1.02 (0.788‑1.34)

1.17 (0.859‑1.61)

1.29 (0.909‑1.85)

3-hr 0.284 (0.253‑0.322)

0.345 (0.307‑0.391)

0.427 (0.379‑0.486)

0.497 (0.436‑0.571)

0.594 (0.501‑0.712)

0.673 (0.553‑0.827)

0.755 (0.602‑0.956)

0.842 (0.649‑1.10)

0.966 (0.708‑1.33)

1.07 (0.749‑1.53)

6-hr 0.196 (0.175‑0.222)

0.239 (0.213‑0.271)

0.297 (0.264‑0.338)

0.346 (0.304‑0.398)

0.415 (0.350‑0.497)

0.470 (0.386‑0.577)

0.527 (0.421‑0.668)

0.589 (0.454‑0.771)

0.675 (0.495‑0.929)

0.744 (0.523‑1.07)

12-hr 0.127 (0.113‑0.144)

0.157 (0.140‑0.178)

0.199 (0.176‑0.226)

0.234 (0.205‑0.269)

0.283 (0.239‑0.339)

0.323 (0.265‑0.397)

0.365 (0.291‑0.462)

0.409 (0.315‑0.536)

0.472 (0.346‑0.650)

0.522 (0.368‑0.750)

24-hr 0.083 (0.075‑0.094)

0.104 (0.094‑0.118)

0.133 (0.120‑0.152)

0.158 (0.141‑0.181)

0.194 (0.167‑0.229)

0.222 (0.188‑0.267)

0.252 (0.209‑0.310)

0.284 (0.229‑0.359)

0.330 (0.256‑0.433)

0.367 (0.276‑0.498)

2-day 0.053 (0.047‑0.060)

0.066 (0.059‑0.074)

0.084 (0.075‑0.095)

0.099 (0.088‑0.113)

0.120 (0.104‑0.142)

0.137 (0.116‑0.165)

0.155 (0.129‑0.191)

0.174 (0.141‑0.220)

0.201 (0.156‑0.265)

0.223 (0.168‑0.303)

3-day 0.040 (0.036‑0.045)

0.050 (0.045‑0.056)

0.063 (0.056‑0.071)

0.074 (0.066‑0.085)

0.089 (0.077‑0.106)

0.102 (0.086‑0.123)

0.115 (0.095‑0.142)

0.129 (0.104‑0.163)

0.148 (0.115‑0.195)

0.164 (0.123‑0.222)

4-day 0.033 (0.030‑0.038)

0.041 (0.037‑0.047)

0.052 (0.047‑0.059)

0.061 (0.055‑0.070)

0.074 (0.064‑0.087)

0.084 (0.071‑0.101)

0.095 (0.078‑0.117)

0.106 (0.085‑0.134)

0.121 (0.094‑0.159)

0.134 (0.101‑0.181)

7-day 0.024 (0.021‑0.027)

0.030 (0.027‑0.034)

0.037 (0.034‑0.042)

0.044 (0.039‑0.050)

0.053 (0.045‑0.062)

0.059 (0.050‑0.072)

0.066 (0.055‑0.082)

0.074 (0.059‑0.093)

0.084 (0.065‑0.110)

0.091 (0.069‑0.124)

10-day 0.019 (0.017‑0.021)

0.024 (0.021‑0.027)

0.030 (0.027‑0.034)

0.035 (0.031‑0.040)

0.042 (0.036‑0.049)

0.047 (0.040‑0.057)

0.052 (0.043‑0.065)

0.058 (0.047‑0.073)

0.065 (0.051‑0.086)

0.071 (0.053‑0.096)

20-day 0.012 (0.011‑0.014)

0.016 (0.014‑0.018)

0.020 (0.018‑0.023)

0.023 (0.021‑0.027)

0.028 (0.024‑0.033)

0.031 (0.026‑0.037)

0.034 (0.028‑0.042)

0.037 (0.030‑0.047)

0.041 (0.032‑0.054)

0.045 (0.033‑0.060)

30-day 0.010 (0.009‑0.011)

0.013 (0.012‑0.015)

0.016 (0.015‑0.019)

0.019 (0.017‑0.022)

0.022 (0.019‑0.026)

0.025 (0.021‑0.030)

0.027 (0.023‑0.034)

0.030 (0.024‑0.037)

0.033 (0.025‑0.043)

0.035 (0.026‑0.047)

45-day 0.008 (0.007‑0.009)

0.011 (0.009‑0.012)

0.013 (0.012‑0.015)

0.015 (0.014‑0.018)

0.018 (0.016‑0.021)

0.020 (0.017‑0.024)

0.022 (0.018‑0.027)

0.024 (0.019‑0.030)

0.026 (0.020‑0.034)

0.027 (0.021‑0.037)

60-day 0.007 (0.007‑0.008)

0.009 (0.009‑0.011)

0.012 (0.011‑0.014)

0.014 (0.012‑0.016)

0.016 (0.014‑0.019)

0.018 (0.015‑0.021)

0.019 (0.016‑0.024)

0.021 (0.017‑0.026)

0.022 (0.017‑0.029)

0.024 (0.018‑0.032)

1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).

Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.

Please refer to NOAA Atlas 14 document for more information.

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PF graphical

3.04

2.18

4.69

3.37 https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=intensity&units=english&series=pds 2/4

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Maps & aerials

Small scale terrain https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=intensity&units=english&series=pds 3/4

Large scale terrain

Large scale map

Large scale aerial

3km

2mi

100km

60mi https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=37.7874&lon=-122.4905&data=intensity&units=english&series=pds 4/4

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US Department of Commerce National Oceanic and Atmospheric Administration

National Weather Service National Water Center

1325 East West Highway Silver Spring, MD 20910

Questions?: HDSC.Questions@noaa.gov

Disclaimer

CHINA BEACH

330 SEA CLIFF AVE

320 SEA CLIFF AVE

LAND COVER LEGEND

IMPERVIOUS AREA

PERVIOUS AREA

Inlet 1(E) Rim: 88.10 12" Inv Out: 85.72 T50% Clogging : 1.74'

Inlet 2(E)

RIM: 72.10

8" INV OUT: 69.53

T: 0.29'

Inlet 3(E) Rim: 71.75 8" Inv Out: 69.33 T: 0.11'

Inlet 4(E) - 3 Rim: 43.11 8" Inv Out: 40.70 Q: 2.28 cfs T: 0.00'

EX C2

V-Ditch D: 15"

US FL: 68.93

DS FL 44.17

P1(E) D: 12" 7 LF Outfall

10" Inv Out: 77.33

FL: 75.64

P2(E) D: 10"

3 LF

V-Ditch 3' Width

US FL: 75.64

DS FL: 71.07

8.6 LF

P4(E) D: 8"

23.5 LF

Culvert

FL 69.11

8" INV OUT: 68.39

EX C4

V-ditch D: 1.1'

US FL: 23.88

DS FL: 11.28

EX C1

V-ditch D: 15"

US FL: 89.77

DS FL: 71.75

P3(E) D: 8"

10 LF

Drainage Area 2(E) Impervious Area: 0.002 acres Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.01 cfs

Drainage Area 1(E) Impervious Area: 0.54 acres Pervious Area: 0.01 acres C: 0.94 i: 3.13 in/hr Q: 1.62 cfs

Drainage Area 3(E) Impervious Area: 0.16 acres Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.48 cfs

Drainage Area 5(E) Impervious Area: 0.08 acres Pervious Area: 0.32 acres C: 0.38 i: 3.13 in/hr Q: 0.48 cfs

Drainage Area 4(E) Impervious Area: 0.04 acres Pervious Area: 0.08 acres C: 0.87 i: 3.13 in/hr Q: 0.17 cfs

FL 23.25

Drainage Area 7(E) Impervious Area: 0.02 acres Pervious Area: 0.14 acres C: 0.34 i: 3.13 in/hr Q: 0.17 cfs

Drainage Area 6(E) Impervious Area: 0.08 acres Pervious Area: 0.36 acres C: 0.37 i: 2.87 in/hr Q: 0.47 cfs

Drainage Area 8(E) Impervious Area: 0.21 acres Pervious Area: 1.30 acres C: 0.34 i: 2.65 in/hr Q: 1.36 cfs

Drainage Area 9(E) Impervious Area: 0.13 acres Pervious Area: 0.01 acres C: 0.92 i: 3.13 in/hr Q: 0.40 cfs Outfalls to seawall weepholes

Inlet 6(E)

RIM: 22.59

8" INV OUT: 20.57

T: 2.10'

EX C3

V-ditch D: 15"

US FL: 48.55

DS FL: 33.52

P7(E) D: 8"

20 LF

US Inv 25.64 DS Inv 20.82

MH(E)

Rim: 23.95

8" Inv In: 19.48 (NE) 8" Inv In: 21.48 (E)

T: 3.11'

P6(E) D: 8"

10 LF

US Inv 19.48 DS Inv 20.57 EX C4

V-ditch D: unknown

US FL: 23.25

DS FL: 22.59

EX C4

V-ditch D: 1.1'

US FL: 32.52

DS FL: 26.52

P5(E) D: 8"

6.8 LF

US Inv 33.31 DS Inv 32.52

Inlet 7(E)

TOP 26.27

8" Inv Out: 25.64 T: 2.09'

Inlet 5(E) 4" Pipe Culv

FL/Inv: 33.31 T: 1.33'

Existing 12" SD Outfall (Inv: 16.82)

Existing 12" SD Outfall (Inv: 16.67)

Existing 8" SD Outfall

(INV: 18.86)

December 3, 2021

Exhibit D.1.1

Exhibit D.1.2

LAND COVER LEGEND

IMPERVIOUS AREA

PERVIOUS AREA

Drainage Area 9 Impervious Area: 0 acres Pervious Area: 0.33 acres C: 0.25 i: 3.13 in/hr Q: 0.26 cfs

P3 D: 8"

159.4 LF

S: 11.8%

Existing 12" SD Outfall (Inv: 16.67)

P10 D: 8"

4.8 LF

S: 3.5%

P11 D: 10"

93.7 LF

S: 2.1%

P9 D: 10"

37.4 LF

S: 1.3%

(FS 28.71)

Inv. 22.51

FS 26.94

Inv. 20.12

FS 24.62

Inv. 19.12

FS 24.37

Inv. 18.62

RIM 24.29

Inv. 18.79

Drainage Area 7 Impervious Area: 0.03 acres

Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.08 cfs

P7 D: 10"

69.7 LF

S: 1.4%

Drainage Area 11 Impervious Area: 0 acres

Pervious Area: 0.26 acres C: 0.25 i: 2.98 in/hr Q: 0.19 cfs

Drainage Area 10 Impervious Area: 0 acres Pervious Area: 0.17 acres C: 0.25 i: 2.66 in/hr Q: 0.11 cfs

Hydrodynamic Separator #1 Rim: 24.64 Inv: 19.42

Inlet 3 (DMA 9)

TW: 66.64

Rim: 65.64

BW 52.35

8" Inv Out: 46.85 T: 2.13'

Inlet 4 (DMA 10)

TW: 26.72

Rim: 25.72 8" Inv Out: 21.06 T: 1.46'

Inlet 5 (DMA 11)

(TW): 29.41

Rim: 28.41

BW 24.61

8" Inv Out: 19.86 T: 1.55' P5

D: 8"

63.2 LF

S: 12.5%

P8 D: 8"

13 LF

S: 5.7%

P6 D: 8"

9.7 LF

S: 9.7%

Drainage Area 15 Impervious Area: 0 acres Pervious Area: 0.10 acres C: 0.25 i: 3.13 in/hr Q: 0.08 cfs

P25 D: 8"

14.6 LF

S: 11.5%

P26 D: 8"

3.3 LF

S: 1.4%

(FS 34.46)

Inv. 28.03

Inlet 13 (DMA 15) Rim: 38.83 8" Inv Out: 33.21 T: 1.09'

Inlet 14 (DMA 11) Rim: 33.64 8" Inv: 21.77 T: 1.28'

Drainage Area 16 Impervious Area: 0 acres

Pervious Area: 0.16 acres C: 0.25 i: 3.13 in/hr Q: 0.12 cfs

P32 D: 8"

11.0 LF

S: 11.0%

FS 26.68

Inv. 20.07

Exhibit E.1.1

Exhibit E.1.2

P16 D: 8"

72.2 LF

S: 11.6%

Hydrodynamic Separator #2 Rim: 24.64 Inv: 20.59

Inlet 9 (DMA 6) Rim/(FL): 25.43 8" Inv. Out: 21.43 T: 1.64'

LAND COVER LEGEND

IMPERVIOUS AREA

PERVIOUS AREA

P12 D: 8"

245.90 LF

S: 11.9%

P14 D: 8"

64.8 LF

S: 12.8%

Drainage Area 4 Impervious Area: 0.07 acres Pervious Area: 0.02 acres C: 0.80 i: 3.13 in/hr Q: 0.22 cfs

P13 D: 8"

14.9 LF

S: 9.7%

P15 D: 8"

2.6 LF

S: 6.2%

(ES 41.67)

Inv. 37.67

(FS 34.10)

Inv. 29.35

P18 D: 10"

183.5 LF

S: 1.1%

Drainage Area 6 Impervious Area: 0.02 acres

Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.07 cfs

Drainage Area 13 Impervious Area: 0 acres

Pervious Area: 0.27 acres C: 0.25 i: 2.92 in/hr Q: 0.19 cfs

P19 D: 12"

4 LF

S: 2.0%

FS 23.44

Inv. 18.94

FS 25.48

Inv. 20.98

Existing 8" SD Outfall Proposed 12" SD Outfall

(INV: 18.86)

(BW 22.25)

Inv. 19.25

Drainage Area 3 Impervious Area: 0.09 acres Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.26 cfs

Drainage Area 5 Impervious Area: 0.07 acres Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.20 cfs

Inlet 6 (DMA 3) Rim: 71.35 8" Inv. Out: 67.52 T: 1.11'

Inlet 8 (DMA 5) Rim/(FL): 33.51 8" Inv. Out: 29.51 T: 1.58'

Inlet 10 (DMA 13) Rim: 29.00

BW: 24.16

10" Inv Out: 20.33 T: 2.15'

Drainage Area 14 Impervious Area: 0 acres

Pervious Area: 0.11 acres C: 0.25 i: 3.13 in/hr Q: 0.09 cfs

Inlet 11 (DMA 14) Rim: 29.76

BW: 22.47

10" Inv Out: 19.64 T: 1.71'

P20c D: 10"

59.6 LF

S: 0.7%

P21 D: 10"

53.6 LF

S: 0.6%

P17 D: 8"

10.3 LF

S: 4.4%

P30 D: 8"

4.1 LF

S: 5.0%

Drainage Area 2 Impervious Area: 0.25 acres Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.13 cfs

Drainage Area 1 Impervious Area: 0.12 acres Pervious Area: 0 acres C: 0.95 i: 3.13 in/hr Q: 0.37 cfs

Inlet 2 (DMA 2a) Rim: 91.65 Inv In: 84.68 (SW) 8" Inv Out: 68.90 (NW) T: 2.89'

P1 D: 8"

43.5 LF

S: 2.0%

P2 D: 8"

23.1 LF

6.0%

Drainage Area 16 Impervious Area: 0.03 acres Pervious Area: 0.003 acres C: 0.87 i: 3.13 in/hr Q: 0.08 cfs

Inlet 1 (DMA 1) Rim: 90.55

8" Inv Out: 85.55 (NE) T: 5.25'

P27 D: 8"

9.7 LF

5.6%

P28 D: 8"

41.4 LF

S: 5.0%

P29 D: 8"

157.5 LF

S: 10.0%

Inlet 16 (DMA 16) Rim: 89.56

8" Inv. Out: 85.06 T: 3.99'

P31 D: 8"

4.1 LF

S: 11.0%

Inv. 66.97

Inv. 67.30

FS 71.51

Inv. 67.51

Drainage Area 12 Impervious Area: 0.01 acres

Pervious Area: 0.43 acres C: 0.35 i: 2.92 in/hr Q: 0.34 cfs

Inlet 15 (DMA 12) Rim: 28.13

BW: 24.45

10" Inv Out: 20.62 T: 2.47'

P20b D: 10"

57.4 LF

S: 1.2%

P20a D: 10"

23.9 LF

S: 1.2%

Inlet 7 (DMA 4) Rim(TG): 43.11

8" Inv. Out: 39.11 T: 0.00'

Exhibit E.1.3

Exhibit E.1.4

Drainage Area 17 Impervious Area: 0 acres Pervious Area: 0.16 acres C: 0.25 i: 3.13 in/hr Q: 0.13 cfs

Inlet 12

TW 32.59

Rim: 31.50

(BW): 23.57

8" Inv Out: 18.50 T: 1.75'

P22 D: 10"

87 LF

S: 1.0%

Drainage Area 8 Impervious Area: 0.17 acres Pervious Area: 0.02 acres C: 0.89 i: 3.13 in/hr Q: 0.53 cfs

Existing 12" SD Outfall (Inv: 16.82)

Rim 22.27 Inv. 18.44

SDMH

Rim 25.31 Inv In (SW): 17.57 Inv In (S): 17.94 Inv Out (NW): 17.44

P23 D: 10"

24.7 LF

2.5%

P24 D: 8"

18.8 LF

3.0%

Exhibit E.1.5

Exhibit E.1.6

Drainage Area 3 Impervious Area: 0.09 acres

Pervious Area: 0 acres

C1

172 LF

S: 10.6%

Drainage Area 4 Impervious Area: 0.07 acres Pervious Area: 0.02 acres

C2

195 LF

S: 13.0%

Drainage Area 5 Impervious Area: 0.07 acres Pervious Area: 0 acres

Drainage Area 6 Impervious Area: 0.02 acres Pervious Area: 0 acres

C3

75 LF

S: 11.4%

C3

58 LF

S: 12.8%

LAND COVER LEGEND

IMPERVIOUS AREA

PERVIOUS AREA

Exhibit E.1.7

Exhibit E.1.8

Exhibit E.1.8