Attachment 5n - PC Report H_HydroReports_Part-6 — Riverside City Council, May 20, 2025 (part 3 of 3)

17.500 0.00 0.00 0.058 O | | | | 2.51

17.583 0.00 0.00 0.058 O | | | | 2.51

17.667 0.00 0.00 0.058 O | | | | 2.51

17.750 0.00 0.00 0.058 O | | | | 2.51

17.833 0.00 0.00 0.058 O | | | | 2.51

17.917 0.00 0.00 0.058 O | | | | 2.51

18.000 0.00 0.00 0.058 O | | | | 2.51

18.083 0.00 0.00 0.058 O | | | | 2.51

18.167 0.00 0.00 0.058 O | | | | 2.51

18.250 0.00 0.00 0.058 O | | | | 2.51

18.333 0.00 0.00 0.058 O | | | | 2.51

18.417 0.00 0.00 0.058 O | | | | 2.51 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices Remaining water in basin = 0.06 (Ac.Ft)
****************************HYDROGRAPH DATA**************************** Number of intervals = 221
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 0.217 (CFS)
Total volume = 0.082 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** -------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

FLOOD HYDROGRAPH ROUTING PROGRAM
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018
Study date: 01/21/25
---------------------------------------------------------------------

RCH GARAGE
10-YR 6-HR
DMA-A BMP-1

KIMLEY-HORN
-------------------------------------------------------------------- Program License Serial Number 6443
-------------------------------------------------------------------- ********************* HYDROGRAPH INFORMATION ********************** From study/file name: RCHPH1A610.rte
****************************HYDROGRAPH DATA**************************** Number of intervals = 79
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 1.454 (CFS)
Total volume = 0.182 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 0.000 to Point/Station 0.000 **** RETARDING BASIN ROUTING ****
______________________________________________________________________ User entry of depth-outflow-storage data
-------------------------------------------------------------------- Total number of inflow hydrograph intervals = 79
Hydrograph time unit = 5.000 (Min.)
Initial depth in storage basin = 0.00(Ft.)
-------------------------------------------------------------------- -------------------------------------------------------------------- Initial basin depth = 0.00 (Ft.)
Initial basin storage = 0.00 (Ac.Ft)
Initial basin outflow = 0.00 (CFS)
--------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices -------------------------------------------------------------------- Depth vs. Storage and Depth vs. Discharge data:

Basin Depth Storage Outflow (S-O*dt/2) (S+O*dt/2) (Ft.) (Ac.Ft) (CFS) (Ac.Ft) (Ac.Ft)
---------------------------------------------------------------------

0.000 0.000 0.000 0.000 0.000

0.500 0.008 0.001 0.008 0.008

1.000 0.017 0.001 0.017 0.017

1.500 0.028 0.000 0.028 0.028

2.000 0.042 0.000 0.042 0.042

2.500 0.058 0.000 0.058 0.058

3.000 0.074 0.078 0.074 0.074

3.500 0.091 0.140 0.091 0.091

4.000 0.108 0.182 0.107 0.109

4.500 0.126 0.216 0.125 0.127

5.000 0.143 0.245 0.142 0.144

5.500 0.160 0.271 0.159 0.161

6.000 0.177 0.295 0.176 0.178

6.500 0.194 0.317 0.193 0.195

7.000 0.209 0.337 0.208 0.210

7.500 0.223 0.357 0.222 0.224

8.000 0.234 0.443 0.232 0.236

8.500 0.243 0.493 0.241 0.245

9.000 0.251 0.534 0.249 0.253

10.000 0.252 4.346 0.237 0.267
-------------------------------------------------------------------- Hydrograph Detention Basin Routing
--------------------------------------------------------------------- Graph values: 'I'= unit inflow; 'O'=outflow at time shown --------------------------------------------------------------------- Time Inflow Outflow Storage Depth (Hours) (CFS) (CFS) (Ac.Ft) .0 0.4 0.73 1.09 1.45 (Ft.)

0.083 0.01 0.00 0.000 O | | | | 0.00

0.167 0.08 0.00 0.000 OI | | | | 0.02

0.250 0.12 0.00 0.001 O I | | | | 0.07

0.333 0.14 0.00 0.002 O I | | | | 0.13

0.417 0.15 0.00 0.003 O I | | | | 0.19

0.500 0.15 0.00 0.004 O I | | | | 0.25

0.583 0.17 0.00 0.005 O I | | | | 0.32

0.667 0.17 0.00 0.006 O I | | | | 0.39

0.750 0.18 0.00 0.007 O I | | | | 0.47

0.833 0.18 0.00 0.009 O I | | | | 0.54

0.917 0.18 0.00 0.010 O I | | | | 0.61

1.000 0.18 0.00 0.011 O I | | | | 0.67

1.083 0.19 0.00 0.012 O I | | | | 0.75

1.167 0.20 0.00 0.014 O I | | | | 0.82

1.250 0.20 0.00 0.015 O I | | | | 0.90

1.333 0.20 0.00 0.017 O I | | | | 0.97

1.417 0.20 0.00 0.018 O I | | | | 1.04

1.500 0.20 0.00 0.019 O I | | | | 1.11 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

1.583 0.20 0.00 0.021 O I | | | | 1.17

1.667 0.20 0.00 0.022 O I | | | | 1.23

1.750 0.20 0.00 0.024 O I | | | | 1.30

1.833 0.20 0.00 0.025 O I | | | | 1.36

1.917 0.20 0.00 0.026 O I | | | | 1.42

2.000 0.21 0.00 0.028 O I | | | | 1.49

2.083 0.22 0.00 0.029 O I | | | | 1.54

2.167 0.21 0.00 0.031 O I | | | | 1.59

2.250 0.22 0.00 0.032 O I | | | | 1.65

2.333 0.23 0.00 0.034 O I | | | | 1.70

2.417 0.23 0.00 0.035 O I | | | | 1.76

2.500 0.23 0.00 0.037 O I | | | | 1.81

2.583 0.23 0.00 0.038 O I | | | | 1.87

2.667 0.23 0.00 0.040 O I | | | | 1.93

2.750 0.23 0.00 0.042 O I | | | | 1.98

2.833 0.24 0.00 0.043 O I | | | | 2.04

2.917 0.25 0.00 0.045 O I | | | | 2.09

3.000 0.25 0.00 0.047 O I | | | | 2.14

3.083 0.25 0.00 0.048 O I | | | | 2.20

3.167 0.26 0.00 0.050 O I | | | | 2.25

3.250 0.27 0.00 0.052 O I | | | | 2.31

3.333 0.28 0.00 0.054 O I | | | | 2.37

3.417 0.28 0.00 0.056 O I | | | | 2.43

3.500 0.30 0.00 0.058 O I | | | | 2.49

3.583 0.32 0.01 0.060 O I| | | | 2.56

3.667 0.34 0.02 0.062 O I| | | | 2.62

3.750 0.35 0.03 0.064 O I| | | | 2.69

3.833 0.37 0.04 0.066 O I | | | 2.76

3.917 0.38 0.05 0.069 |O I | | | 2.83

4.000 0.40 0.06 0.071 |O I | | | 2.91

4.083 0.40 0.07 0.073 |O I | | | 2.98

4.167 0.42 0.08 0.076 |O |I | | | 3.05

4.250 0.45 0.09 0.078 | O |I | | | 3.12

4.333 0.47 0.10 0.080 | O | I | | | 3.19

4.417 0.50 0.11 0.083 | O | I | | | 3.27

4.500 0.52 0.12 0.086 | O | I | | | 3.34

4.583 0.53 0.13 0.088 | O | I | | | 3.43

4.667 0.55 0.14 0.091 | O | I | | | 3.51

4.750 0.57 0.15 0.094 | O | I | | | 3.59

4.833 0.59 0.16 0.097 | O | I | | | 3.68

4.917 0.61 0.16 0.100 | O | I | | | 3.77

5.000 0.63 0.17 0.103 | O | I | | | 3.86

5.083 0.66 0.18 0.106 | O | I | | | 3.96

5.167 0.78 0.19 0.110 | O | |I | | 4.06

5.250 0.92 0.19 0.115 | O | | I | | 4.19

5.333 1.05 0.20 0.120 | O | | I| | 4.34

5.417 1.18 0.22 0.126 | O | | |I | 4.51

5.500 1.36 0.23 0.134 | O | | | I | 4.72

5.583 1.45 0.24 0.142 | O | | | I 4.96

5.667 0.86 0.25 0.148 | O | | I | | 5.14

5.750 0.48 0.26 0.151 | O | I | | | 5.23 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

5.833 0.29 0.26 0.152 | OI | | | | 5.25

5.917 0.18 0.26 0.151 | IO | | | | 5.25

6.000 0.12 0.26 0.151 | I O | | | | 5.23

6.083 0.08 0.26 0.150 |I O | | | | 5.19

6.167 0.03 0.25 0.148 I O | | | | 5.15

6.250 0.01 0.25 0.147 I O | | | | 5.11

6.333 0.00 0.25 0.145 I O | | | | 5.06

6.417 0.00 0.25 0.143 I O | | | | 5.01

6.500 0.00 0.24 0.142 I O | | | | 4.96

6.583 0.00 0.24 0.140 I O | | | | 4.91

6.667 0.00 0.24 0.138 I O | | | | 4.86

6.750 0.00 0.23 0.137 I O | | | | 4.81

6.833 0.00 0.23 0.135 I O | | | | 4.77

6.917 0.00 0.23 0.134 I O | | | | 4.72

7.000 0.00 0.23 0.132 I O | | | | 4.67

7.083 0.00 0.22 0.130 I O | | | | 4.63

7.167 0.00 0.22 0.129 I O | | | | 4.58

7.250 0.00 0.22 0.127 I O | | | | 4.54

7.333 0.00 0.22 0.126 I O | | | | 4.50

7.417 0.00 0.21 0.124 I O | | | | 4.45

7.500 0.00 0.21 0.123 I O | | | | 4.41

7.583 0.00 0.21 0.121 I O | | | | 4.37

7.667 0.00 0.20 0.120 I O | | | | 4.34

7.750 0.00 0.20 0.119 I O | | | | 4.30

7.833 0.00 0.20 0.117 I O | | | | 4.26

7.917 0.00 0.20 0.116 I O | | | | 4.22

8.000 0.00 0.19 0.115 I O | | | | 4.18

8.083 0.00 0.19 0.113 I O | | | | 4.15

8.167 0.00 0.19 0.112 I O | | | | 4.11

8.250 0.00 0.19 0.111 I O | | | | 4.07

8.333 0.00 0.18 0.109 I O | | | | 4.04

8.417 0.00 0.18 0.108 I O | | | | 4.00

8.500 0.00 0.18 0.107 I O | | | | 3.97

8.583 0.00 0.18 0.106 I O | | | | 3.93

8.667 0.00 0.17 0.104 I O | | | | 3.89

8.750 0.00 0.17 0.103 I O | | | | 3.86

8.833 0.00 0.17 0.102 I O | | | | 3.83

8.917 0.00 0.16 0.101 I O | | | | 3.79

9.000 0.00 0.16 0.100 I O | | | | 3.76

9.083 0.00 0.16 0.099 I O | | | | 3.73

9.167 0.00 0.16 0.098 I O | | | | 3.69

9.250 0.00 0.15 0.097 I O | | | | 3.66

9.333 0.00 0.15 0.095 I O | | | | 3.63

9.417 0.00 0.15 0.094 I O | | | | 3.60

9.500 0.00 0.15 0.093 I O | | | | 3.57

9.583 0.00 0.14 0.092 I O | | | | 3.54

9.667 0.00 0.14 0.091 I O | | | | 3.51

9.750 0.00 0.14 0.091 I O | | | | 3.49

9.833 0.00 0.13 0.090 I O | | | | 3.46

9.917 0.00 0.13 0.089 I O | | | | 3.43

10.000 0.00 0.13 0.088 I O | | | | 3.40 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

10.083 0.00 0.12 0.087 I O | | | | 3.38

10.167 0.00 0.12 0.086 I O | | | | 3.35

10.250 0.00 0.12 0.085 I O | | | | 3.33

10.333 0.00 0.12 0.084 I O | | | | 3.31

10.417 0.00 0.11 0.084 I O | | | | 3.28

10.500 0.00 0.11 0.083 I O | | | | 3.26

10.583 0.00 0.11 0.082 I O | | | | 3.24

10.667 0.00 0.10 0.081 I O | | | | 3.22

10.750 0.00 0.10 0.081 I O | | | | 3.20

10.833 0.00 0.10 0.080 I O | | | | 3.18

10.917 0.00 0.10 0.079 I O | | | | 3.16

11.000 0.00 0.09 0.079 I O | | | | 3.14

11.083 0.00 0.09 0.078 I O | | | | 3.12

11.167 0.00 0.09 0.077 IO | | | | 3.10

11.250 0.00 0.09 0.077 IO | | | | 3.08

11.333 0.00 0.09 0.076 IO | | | | 3.06

11.417 0.00 0.08 0.076 IO | | | | 3.05

11.500 0.00 0.08 0.075 IO | | | | 3.03

11.583 0.00 0.08 0.074 IO | | | | 3.01

11.667 0.00 0.08 0.074 IO | | | | 3.00

11.750 0.00 0.07 0.073 IO | | | | 2.98

11.833 0.00 0.07 0.073 IO | | | | 2.96

11.917 0.00 0.07 0.072 IO | | | | 2.95

12.000 0.00 0.07 0.072 IO | | | | 2.93

12.083 0.00 0.07 0.071 IO | | | | 2.92

12.167 0.00 0.06 0.071 IO | | | | 2.91

12.250 0.00 0.06 0.071 IO | | | | 2.89

12.333 0.00 0.06 0.070 IO | | | | 2.88

12.417 0.00 0.06 0.070 IO | | | | 2.87

12.500 0.00 0.06 0.069 IO | | | | 2.85

12.583 0.00 0.05 0.069 IO | | | | 2.84

12.667 0.00 0.05 0.069 IO | | | | 2.83

12.750 0.00 0.05 0.068 IO | | | | 2.82

12.833 0.00 0.05 0.068 IO | | | | 2.81

12.917 0.00 0.05 0.068 IO | | | | 2.80

13.000 0.00 0.05 0.067 O | | | | 2.79

13.083 0.00 0.04 0.067 O | | | | 2.78

13.167 0.00 0.04 0.067 O | | | | 2.77

13.250 0.00 0.04 0.066 O | | | | 2.76

13.333 0.00 0.04 0.066 O | | | | 2.75

13.417 0.00 0.04 0.066 O | | | | 2.75

13.500 0.00 0.04 0.066 O | | | | 2.74

13.583 0.00 0.04 0.065 O | | | | 2.73

13.667 0.00 0.03 0.065 O | | | | 2.72

13.750 0.00 0.03 0.065 O | | | | 2.71

13.833 0.00 0.03 0.065 O | | | | 2.71

13.917 0.00 0.03 0.064 O | | | | 2.70

14.000 0.00 0.03 0.064 O | | | | 2.69

14.083 0.00 0.03 0.064 O | | | | 2.69

14.167 0.00 0.03 0.064 O | | | | 2.68

14.250 0.00 0.03 0.064 O | | | | 2.68 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

14.333 0.00 0.03 0.063 O | | | | 2.67

14.417 0.00 0.03 0.063 O | | | | 2.66

14.500 0.00 0.02 0.063 O | | | | 2.66

14.583 0.00 0.02 0.063 O | | | | 2.65

14.667 0.00 0.02 0.063 O | | | | 2.65

14.750 0.00 0.02 0.063 O | | | | 2.64

14.833 0.00 0.02 0.062 O | | | | 2.64

14.917 0.00 0.02 0.062 O | | | | 2.63

15.000 0.00 0.02 0.062 O | | | | 2.63

15.083 0.00 0.02 0.062 O | | | | 2.63

15.167 0.00 0.02 0.062 O | | | | 2.62

15.250 0.00 0.02 0.062 O | | | | 2.62

15.333 0.00 0.02 0.062 O | | | | 2.61

15.417 0.00 0.02 0.062 O | | | | 2.61

15.500 0.00 0.02 0.061 O | | | | 2.61

15.583 0.00 0.02 0.061 O | | | | 2.60

15.667 0.00 0.02 0.061 O | | | | 2.60

15.750 0.00 0.01 0.061 O | | | | 2.60

15.833 0.00 0.01 0.061 O | | | | 2.59

15.917 0.00 0.01 0.061 O | | | | 2.59

16.000 0.00 0.01 0.061 O | | | | 2.59

16.083 0.00 0.01 0.061 O | | | | 2.58

16.167 0.00 0.01 0.061 O | | | | 2.58

16.250 0.00 0.01 0.061 O | | | | 2.58

16.333 0.00 0.01 0.060 O | | | | 2.58

16.417 0.00 0.01 0.060 O | | | | 2.57

16.500 0.00 0.01 0.060 O | | | | 2.57

16.583 0.00 0.01 0.060 O | | | | 2.57

16.667 0.00 0.01 0.060 O | | | | 2.57

16.750 0.00 0.01 0.060 O | | | | 2.56

16.833 0.00 0.01 0.060 O | | | | 2.56

16.917 0.00 0.01 0.060 O | | | | 2.56

17.000 0.00 0.01 0.060 O | | | | 2.56

17.083 0.00 0.01 0.060 O | | | | 2.56

17.167 0.00 0.01 0.060 O | | | | 2.55

17.250 0.00 0.01 0.060 O | | | | 2.55

17.333 0.00 0.01 0.060 O | | | | 2.55

17.417 0.00 0.01 0.060 O | | | | 2.55

17.500 0.00 0.01 0.060 O | | | | 2.55

17.583 0.00 0.01 0.059 O | | | | 2.55

17.667 0.00 0.01 0.059 O | | | | 2.54

17.750 0.00 0.01 0.059 O | | | | 2.54

17.833 0.00 0.01 0.059 O | | | | 2.54

17.917 0.00 0.01 0.059 O | | | | 2.54

18.000 0.00 0.01 0.059 O | | | | 2.54

18.083 0.00 0.01 0.059 O | | | | 2.54

18.167 0.00 0.01 0.059 O | | | | 2.54

18.250 0.00 0.01 0.059 O | | | | 2.53

18.333 0.00 0.01 0.059 O | | | | 2.53

18.417 0.00 0.01 0.059 O | | | | 2.53

18.500 0.00 0.00 0.059 O | | | | 2.53 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

18.583 0.00 0.00 0.059 O | | | | 2.53

18.667 0.00 0.00 0.059 O | | | | 2.53

18.750 0.00 0.00 0.059 O | | | | 2.53

18.833 0.00 0.00 0.059 O | | | | 2.53

18.917 0.00 0.00 0.059 O | | | | 2.53

19.000 0.00 0.00 0.059 O | | | | 2.53

19.083 0.00 0.00 0.059 O | | | | 2.52

19.167 0.00 0.00 0.059 O | | | | 2.52

19.250 0.00 0.00 0.059 O | | | | 2.52

19.333 0.00 0.00 0.059 O | | | | 2.52

19.417 0.00 0.00 0.059 O | | | | 2.52

19.500 0.00 0.00 0.059 O | | | | 2.52

19.583 0.00 0.00 0.059 O | | | | 2.52

19.667 0.00 0.00 0.059 O | | | | 2.52

19.750 0.00 0.00 0.059 O | | | | 2.52

19.833 0.00 0.00 0.059 O | | | | 2.52

19.917 0.00 0.00 0.059 O | | | | 2.52

20.000 0.00 0.00 0.059 O | | | | 2.52

20.083 0.00 0.00 0.059 O | | | | 2.52

20.167 0.00 0.00 0.059 O | | | | 2.52

20.250 0.00 0.00 0.058 O | | | | 2.52

20.333 0.00 0.00 0.058 O | | | | 2.52

20.417 0.00 0.00 0.058 O | | | | 2.51

20.500 0.00 0.00 0.058 O | | | | 2.51

20.583 0.00 0.00 0.058 O | | | | 2.51

20.667 0.00 0.00 0.058 O | | | | 2.51

20.750 0.00 0.00 0.058 O | | | | 2.51

20.833 0.00 0.00 0.058 O | | | | 2.51

20.917 0.00 0.00 0.058 O | | | | 2.51

21.000 0.00 0.00 0.058 O | | | | 2.51

21.083 0.00 0.00 0.058 O | | | | 2.51

21.167 0.00 0.00 0.058 O | | | | 2.51

21.250 0.00 0.00 0.058 O | | | | 2.51

21.333 0.00 0.00 0.058 O | | | | 2.51

21.417 0.00 0.00 0.058 O | | | | 2.51

21.500 0.00 0.00 0.058 O | | | | 2.51

21.583 0.00 0.00 0.058 O | | | | 2.51

21.667 0.00 0.00 0.058 O | | | | 2.51

21.750 0.00 0.00 0.058 O | | | | 2.51

21.833 0.00 0.00 0.058 O | | | | 2.51

21.917 0.00 0.00 0.058 O | | | | 2.51

22.000 0.00 0.00 0.058 O | | | | 2.51

22.083 0.00 0.00 0.058 O | | | | 2.51

22.167 0.00 0.00 0.058 O | | | | 2.51

22.250 0.00 0.00 0.058 O | | | | 2.51

22.333 0.00 0.00 0.058 O | | | | 2.51

22.417 0.00 0.00 0.058 O | | | | 2.51

22.500 0.00 0.00 0.058 O | | | | 2.51 Remaining water in basin = 0.06 (Ac.Ft)
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices ****************************HYDROGRAPH DATA**************************** Number of intervals = 270
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 0.258 (CFS)
Total volume = 0.124 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** -------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

FLOOD HYDROGRAPH ROUTING PROGRAM
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018
Study date: 01/21/25
---------------------------------------------------------------------

RCH GARAGE
10-YEAR 24-HR
DMA-A BMP-1

KIMLEY-HORN
-------------------------------------------------------------------- Program License Serial Number 6443
-------------------------------------------------------------------- ********************* HYDROGRAPH INFORMATION ********************** From study/file name: rchph1a2410.rte
****************************HYDROGRAPH DATA**************************** Number of intervals = 295
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 0.460 (CFS)
Total volume = 0.280 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 0.000 to Point/Station 0.000 **** RETARDING BASIN ROUTING ****
______________________________________________________________________ User entry of depth-outflow-storage data
-------------------------------------------------------------------- Total number of inflow hydrograph intervals = 295
Hydrograph time unit = 5.000 (Min.)
Initial depth in storage basin = 0.00(Ft.)
-------------------------------------------------------------------- -------------------------------------------------------------------- Initial basin depth = 0.00 (Ft.)
Initial basin storage = 0.00 (Ac.Ft)
Initial basin outflow = 0.00 (CFS)
--------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices -------------------------------------------------------------------- Depth vs. Storage and Depth vs. Discharge data:

Basin Depth Storage Outflow (S-O*dt/2) (S+O*dt/2) (Ft.) (Ac.Ft) (CFS) (Ac.Ft) (Ac.Ft)
---------------------------------------------------------------------

0.000 0.000 0.000 0.000 0.000

0.500 0.008 0.001 0.008 0.008

1.000 0.017 0.001 0.017 0.017

1.500 0.028 0.001 0.028 0.028

2.000 0.042 0.000 0.042 0.042

2.500 0.058 0.000 0.058 0.058

3.000 0.074 0.078 0.074 0.074

3.500 0.091 0.140 0.091 0.091

4.000 0.108 0.182 0.107 0.109

4.500 0.126 0.216 0.125 0.127

5.000 0.143 0.245 0.142 0.144

5.500 0.160 0.271 0.159 0.161

6.000 0.177 0.295 0.176 0.178

6.500 0.194 0.317 0.193 0.195

7.000 0.209 0.337 0.208 0.210

7.500 0.223 0.357 0.222 0.224

8.000 0.234 0.443 0.232 0.236

8.500 0.243 0.493 0.241 0.245

9.000 0.251 0.534 0.249 0.253

0.083 0.00 0.00 0.000 O | | | | 0.00

0.167 0.02 0.00 0.000 OI | | | | 0.00

0.250 0.02 0.00 0.000 OI | | | | 0.01

0.333 0.03 0.00 0.000 OI | | | | 0.02

0.417 0.04 0.00 0.001 O I | | | | 0.04

0.500 0.04 0.00 0.001 O I | | | | 0.05

0.583 0.04 0.00 0.001 O I | | | | 0.07

0.667 0.04 0.00 0.001 O I | | | | 0.09

0.750 0.04 0.00 0.002 O I | | | | 0.10

0.833 0.04 0.00 0.002 O I | | | | 0.12

0.917 0.05 0.00 0.002 O I | | | | 0.14

1.000 0.05 0.00 0.003 O I | | | | 0.16

1.083 0.05 0.00 0.003 O I | | | | 0.19

1.167 0.05 0.00 0.003 O I | | | | 0.21

1.250 0.04 0.00 0.004 O I | | | | 0.23

1.333 0.04 0.00 0.004 O I | | | | 0.24

1.417 0.04 0.00 0.004 O I | | | | 0.26

1.500 0.04 0.00 0.004 O I | | | | 0.28 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

1.583 0.04 0.00 0.005 O I | | | | 0.30

1.667 0.04 0.00 0.005 O I | | | | 0.31

1.750 0.04 0.00 0.005 O I | | | | 0.33

1.833 0.04 0.00 0.006 O I | | | | 0.35

1.917 0.05 0.00 0.006 O I | | | | 0.37

2.000 0.05 0.00 0.006 O I | | | | 0.39

2.083 0.05 0.00 0.007 O I | | | | 0.41

2.167 0.05 0.00 0.007 O I | | | | 0.43

2.250 0.05 0.00 0.007 O I | | | | 0.46

2.333 0.05 0.00 0.008 O I | | | | 0.48

2.417 0.05 0.00 0.008 O I | | | | 0.50

2.500 0.05 0.00 0.008 O I | | | | 0.52

2.583 0.06 0.00 0.009 O I | | | | 0.54

2.667 0.06 0.00 0.009 O I | | | | 0.56

2.750 0.07 0.00 0.010 O I | | | | 0.59

2.833 0.07 0.00 0.010 O I | | | | 0.61

2.917 0.07 0.00 0.011 O I | | | | 0.64

3.000 0.07 0.00 0.011 O I | | | | 0.66

3.083 0.07 0.00 0.011 O I | | | | 0.69

3.167 0.07 0.00 0.012 O I | | | | 0.72

3.250 0.07 0.00 0.012 O I | | | | 0.74

3.333 0.07 0.00 0.013 O I | | | | 0.77

3.417 0.07 0.00 0.013 O I | | | | 0.79

3.500 0.07 0.00 0.014 O I | | | | 0.82

3.583 0.07 0.00 0.014 O I | | | | 0.84

3.667 0.07 0.00 0.015 O I | | | | 0.87

3.750 0.07 0.00 0.015 O I | | | | 0.89

3.833 0.07 0.00 0.016 O I | | | | 0.92

3.917 0.08 0.00 0.016 O I | | | | 0.95

4.000 0.08 0.00 0.017 O I | | | | 0.98

4.083 0.08 0.00 0.017 O I | | | | 1.01

4.167 0.08 0.00 0.018 O I | | | | 1.03

4.250 0.08 0.00 0.018 O I | | | | 1.06

4.333 0.08 0.00 0.019 O I | | | | 1.08

4.417 0.09 0.00 0.019 O I | | | | 1.11

4.500 0.09 0.00 0.020 O I | | | | 1.14

4.583 0.09 0.00 0.021 O I | | | | 1.17

4.667 0.09 0.00 0.021 O I | | | | 1.19

4.750 0.09 0.00 0.022 O I | | | | 1.22

4.833 0.10 0.00 0.023 O I | | | | 1.25

4.917 0.10 0.00 0.023 O I| | | | 1.28

5.000 0.11 0.00 0.024 O I| | | | 1.32

5.083 0.10 0.00 0.025 O I| | | | 1.35

5.167 0.09 0.00 0.025 O I | | | | 1.38

5.250 0.09 0.00 0.026 O I | | | | 1.41

5.333 0.08 0.00 0.027 O I | | | | 1.43

5.417 0.09 0.00 0.027 O I | | | | 1.46

5.500 0.09 0.00 0.028 O I | | | | 1.49

5.583 0.10 0.00 0.028 O I | | | | 1.51

5.667 0.10 0.00 0.029 O I| | | | 1.54

5.750 0.11 0.00 0.030 O I| | | | 1.56 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

5.833 0.11 0.00 0.031 O I| | | | 1.59

5.917 0.11 0.00 0.031 O I| | | | 1.62

6.000 0.11 0.00 0.032 O I| | | | 1.64

6.083 0.11 0.00 0.033 O I| | | | 1.67

6.167 0.12 0.00 0.034 O I | | | 1.70

6.250 0.12 0.00 0.034 O I | | | 1.73

6.333 0.12 0.00 0.035 O I | | | 1.76

6.417 0.12 0.00 0.036 O I | | | 1.79

6.500 0.12 0.00 0.037 O I | | | 1.82

6.583 0.12 0.00 0.038 O I | | | 1.85

6.667 0.13 0.00 0.039 O |I | | | 1.88

6.750 0.13 0.00 0.039 O |I | | | 1.91

6.833 0.13 0.00 0.040 O |I | | | 1.94

6.917 0.14 0.00 0.041 O |I | | | 1.98

7.000 0.14 0.00 0.042 O |I | | | 2.01

7.083 0.14 0.00 0.043 O |I | | | 2.04

7.167 0.14 0.00 0.044 O |I | | | 2.07

7.250 0.14 0.00 0.045 O |I | | | 2.09

7.333 0.14 0.00 0.046 O |I | | | 2.12

7.417 0.14 0.00 0.047 O | I | | | 2.15

7.500 0.15 0.00 0.048 O | I | | | 2.19

7.583 0.15 0.00 0.049 O | I | | | 2.22

7.667 0.16 0.00 0.050 O | I | | | 2.25

7.750 0.16 0.00 0.051 O | I | | | 2.28

7.833 0.16 0.00 0.052 O | I | | | 2.32

7.917 0.17 0.00 0.053 O | I | | | 2.36

8.000 0.17 0.00 0.055 O | I | | | 2.39

8.083 0.18 0.00 0.056 O | I | | | 2.43

8.167 0.19 0.00 0.057 O | I | | | 2.47

8.250 0.20 0.00 0.058 O | I | | | 2.51

8.333 0.20 0.01 0.060 O | I | | | 2.55

8.417 0.20 0.01 0.061 |O | I | | | 2.60

8.500 0.20 0.02 0.062 |O | I | | | 2.64

8.583 0.20 0.03 0.064 |O | I | | | 2.67

8.667 0.21 0.03 0.065 | O | I | | | 2.71

8.750 0.21 0.04 0.066 | O | I | | | 2.75

8.833 0.22 0.04 0.067 | O | I| | | 2.79

8.917 0.23 0.05 0.068 | O | I| | | 2.83

9.000 0.23 0.06 0.070 | O | I| | | 2.86

9.083 0.23 0.06 0.071 | O | I | | 2.90

9.167 0.25 0.07 0.072 | O | |I | | 2.94

9.250 0.25 0.07 0.073 | O | |I | | 2.98

9.333 0.26 0.08 0.074 | O | |I | | 3.01

9.417 0.27 0.08 0.076 | O | | I | | 3.05

9.500 0.27 0.09 0.077 | O | | I | | 3.09

9.583 0.27 0.09 0.078 | O | | I | | 3.12

9.667 0.28 0.10 0.079 | O | | I | | 3.16

9.750 0.28 0.10 0.081 | O| | I | | 3.20

9.833 0.29 0.11 0.082 | O| | I | | 3.23

9.917 0.29 0.11 0.083 | O| | I | | 3.27

10.000 0.30 0.12 0.084 | O | I | | 3.30 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

10.083 0.29 0.12 0.086 | O | I | | 3.34

10.167 0.24 0.12 0.087 | O I | | 3.37

10.250 0.22 0.13 0.087 | O I| | | 3.39

10.333 0.21 0.13 0.088 | O I | | | 3.41

10.417 0.21 0.13 0.088 | |O I | | | 3.42

10.500 0.20 0.13 0.089 | |O I | | | 3.44

10.583 0.21 0.13 0.089 | |O I | | | 3.45

10.667 0.25 0.14 0.090 | |O |I | | 3.47

10.750 0.26 0.14 0.091 | |O | I | | 3.49

10.833 0.27 0.14 0.092 | |O | I | | 3.52

10.917 0.27 0.14 0.093 | | O | I | | 3.55

11.000 0.27 0.15 0.093 | | O | I | | 3.57

11.083 0.27 0.15 0.094 | | O | I | | 3.60

11.167 0.26 0.15 0.095 | | O | I | | 3.62

11.250 0.26 0.15 0.096 | | O | I | | 3.64

11.333 0.26 0.15 0.097 | | O |I | | 3.66

11.417 0.26 0.16 0.097 | | O |I | | 3.68

11.500 0.26 0.16 0.098 | | O |I | | 3.70

11.583 0.25 0.16 0.099 | | O |I | | 3.72

11.667 0.24 0.16 0.099 | | O I | | 3.74

11.750 0.23 0.16 0.100 | | O I | | 3.76

11.833 0.23 0.16 0.100 | | O I | | 3.77

11.917 0.24 0.16 0.101 | | O I | | 3.79

12.000 0.24 0.17 0.101 | | O I | | 3.80

12.083 0.25 0.17 0.102 | | O |I | | 3.82

12.167 0.30 0.17 0.103 | | O | I | | 3.84

12.250 0.32 0.17 0.104 | | O | I | | 3.87

12.333 0.33 0.17 0.105 | | O | I| | 3.90

12.417 0.35 0.18 0.106 | | O | I | 3.94

12.500 0.35 0.18 0.107 | | O | I | 3.97

12.583 0.35 0.18 0.108 | | O | I | 4.00

12.667 0.37 0.18 0.109 | | O | |I | 4.04

12.750 0.38 0.19 0.111 | | O | | I | 4.07

12.833 0.38 0.19 0.112 | | O | | I | 4.11

12.917 0.39 0.19 0.113 | | O | | I | 4.15

13.000 0.39 0.19 0.115 | | O | | I | 4.18

13.083 0.40 0.20 0.116 | | O | | I | 4.22

13.167 0.44 0.20 0.118 | | O | | I | 4.26

13.250 0.45 0.20 0.119 | | O | | I| 4.31

13.333 0.46 0.21 0.121 | | O | | I| 4.36

13.417 0.46 0.21 0.123 | | O | | I| 4.41

13.500 0.46 0.21 0.124 | | O | | I 4.45

13.583 0.44 0.22 0.126 | | O| | I | 4.50

13.667 0.37 0.22 0.127 | | O| |I | 4.54

13.750 0.33 0.22 0.128 | | O| I| | 4.56

13.833 0.32 0.22 0.129 | | O| I | | 4.59

13.917 0.32 0.22 0.130 | | O| I | | 4.61

14.000 0.31 0.22 0.130 | | O| I | | 4.62

14.083 0.32 0.22 0.131 | | O| I | | 4.64

14.167 0.35 0.23 0.132 | | O| I | 4.66

14.250 0.36 0.23 0.132 | | O| I | 4.69 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

14.333 0.36 0.23 0.133 | | O| |I | 4.72

14.417 0.36 0.23 0.134 | | O I | 4.74

14.500 0.35 0.23 0.135 | | O I | 4.77

14.583 0.35 0.23 0.136 | | O I | 4.79

14.667 0.35 0.23 0.137 | | O I | 4.82

14.750 0.35 0.24 0.138 | | O I | 4.84

14.833 0.35 0.24 0.138 | | O I | 4.86

14.917 0.34 0.24 0.139 | | O I| | 4.89

15.000 0.34 0.24 0.140 | | O I| | 4.91

15.083 0.34 0.24 0.141 | | O I| | 4.93

15.167 0.33 0.24 0.141 | | O I | | 4.95

15.250 0.33 0.24 0.142 | | O I | | 4.96

15.333 0.32 0.24 0.142 | | O I | | 4.98

15.417 0.32 0.24 0.143 | | |O I | | 5.00

15.500 0.31 0.25 0.143 | | |O I | | 5.01

15.583 0.31 0.25 0.144 | | |O I | | 5.02

15.667 0.28 0.25 0.144 | | |O I | | 5.03

15.750 0.27 0.25 0.144 | | |OI | | 5.04

15.833 0.26 0.25 0.144 | | |OI | | 5.04

15.917 0.26 0.25 0.144 | | |OI | | 5.04

16.000 0.26 0.25 0.145 | | |O | | 5.05

16.083 0.24 0.25 0.145 | | IO | | 5.05

16.167 0.13 0.25 0.144 | I |O | | 5.03

16.250 0.09 0.25 0.143 | I | |O | | 5.00

16.333 0.07 0.24 0.142 | I | O | | 4.97

16.417 0.06 0.24 0.141 | I | O | | 4.93

16.500 0.06 0.24 0.139 | I | O | | 4.90

16.583 0.05 0.24 0.138 | I | O | | 4.86

16.667 0.05 0.23 0.137 | I | O | | 4.82

16.750 0.04 0.23 0.136 | I | O | | 4.78

16.833 0.04 0.23 0.134 | I | O | | 4.75

16.917 0.04 0.23 0.133 | I | O| | | 4.71

17.000 0.04 0.23 0.132 | I | O| | | 4.67

17.083 0.04 0.22 0.131 | I | O| | | 4.63

17.167 0.06 0.22 0.129 | I | O| | | 4.60

17.250 0.06 0.22 0.128 | I | O| | | 4.57

17.333 0.07 0.22 0.127 | I | O| | | 4.53

17.417 0.07 0.22 0.126 | I | O| | | 4.50

17.500 0.07 0.21 0.125 | I | O | | | 4.48

17.583 0.07 0.21 0.124 | I | O | | | 4.45

17.667 0.07 0.21 0.123 | I | O | | | 4.42

17.750 0.07 0.21 0.122 | I | O | | | 4.39

17.833 0.07 0.21 0.121 | I | O | | | 4.37

17.917 0.06 0.21 0.120 | I | O | | | 4.34

18.000 0.06 0.20 0.119 | I | O | | | 4.31

18.083 0.06 0.20 0.118 | I | O | | | 4.28

18.167 0.05 0.20 0.117 | I | O | | | 4.25

18.250 0.05 0.20 0.116 | I | O | | | 4.23

18.333 0.05 0.20 0.115 | I | O | | | 4.20

18.417 0.05 0.19 0.114 | I | O | | | 4.17

18.500 0.05 0.19 0.113 | I | O | | | 4.15 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

18.583 0.05 0.19 0.112 | I | O | | | 4.12

18.667 0.05 0.19 0.111 | I | O | | | 4.09

18.750 0.04 0.19 0.110 | I | O | | | 4.07

18.833 0.04 0.18 0.109 | I | O | | | 4.04

18.917 0.03 0.18 0.108 | I | O | | | 4.01

19.000 0.03 0.18 0.107 | I | O | | | 3.98

19.083 0.03 0.18 0.106 | I | O | | | 3.95

19.167 0.04 0.18 0.105 | I | O | | | 3.92

19.250 0.04 0.17 0.104 | I | O | | | 3.89

19.333 0.04 0.17 0.103 | I | O | | | 3.87

19.417 0.05 0.17 0.103 | I | O | | | 3.84

19.500 0.05 0.17 0.102 | I | O | | | 3.82

19.583 0.05 0.16 0.101 | I | O | | | 3.79

19.667 0.05 0.16 0.100 | I | O | | | 3.77

19.750 0.04 0.16 0.099 | I | O | | | 3.75

19.833 0.04 0.16 0.099 | I | O | | | 3.72

19.917 0.03 0.16 0.098 | I | O | | | 3.70

20.000 0.03 0.15 0.097 | I | O | | | 3.67

20.083 0.03 0.15 0.096 | I | O | | | 3.65

20.167 0.04 0.15 0.095 | I | O | | | 3.62

20.250 0.04 0.15 0.094 | I | O | | | 3.60

20.333 0.04 0.15 0.094 | I | O | | | 3.58

20.417 0.04 0.14 0.093 | I | O | | | 3.56

20.500 0.04 0.14 0.092 | I |O | | | 3.54

20.583 0.04 0.14 0.092 | I |O | | | 3.52

20.667 0.04 0.14 0.091 | I |O | | | 3.50

20.750 0.04 0.14 0.090 | I |O | | | 3.48

20.833 0.04 0.13 0.090 | I |O | | | 3.46

20.917 0.03 0.13 0.089 | I |O | | | 3.44

21.000 0.03 0.13 0.088 | I |O | | | 3.42

21.083 0.03 0.13 0.087 | I O | | | 3.40

21.167 0.04 0.12 0.087 | I O | | | 3.38

21.250 0.04 0.12 0.086 | I O | | | 3.36

21.333 0.04 0.12 0.086 | I O | | | 3.34

21.417 0.03 0.12 0.085 | I O | | | 3.33

21.500 0.03 0.12 0.085 | I O | | | 3.31

21.583 0.03 0.11 0.084 | I O| | | | 3.29

21.667 0.04 0.11 0.083 | I O| | | | 3.28

21.750 0.04 0.11 0.083 | I O| | | | 3.26

21.833 0.04 0.11 0.082 | I O| | | | 3.25

21.917 0.03 0.11 0.082 | I O| | | | 3.23

22.000 0.03 0.10 0.081 | I O| | | | 3.22

22.083 0.03 0.10 0.081 | I O| | | | 3.20

22.167 0.04 0.10 0.080 | I O| | | | 3.19

22.250 0.04 0.10 0.080 | I O | | | | 3.17

22.333 0.04 0.10 0.080 | I O | | | | 3.16

22.417 0.03 0.10 0.079 | I O | | | | 3.15

22.500 0.03 0.09 0.079 | I O | | | | 3.14

22.583 0.03 0.09 0.078 |I O | | | | 3.12

22.667 0.03 0.09 0.078 |I O | | | | 3.11

22.750 0.03 0.09 0.077 |I O | | | | 3.10 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

22.833 0.03 0.09 0.077 |I O | | | | 3.08

22.917 0.03 0.09 0.076 |I O | | | | 3.07

23.000 0.03 0.09 0.076 |I O | | | | 3.06

23.083 0.03 0.08 0.076 |I O | | | | 3.05

23.167 0.03 0.08 0.075 |I O | | | | 3.04

23.250 0.03 0.08 0.075 |I O | | | | 3.03

23.333 0.03 0.08 0.075 |I O | | | | 3.01

23.417 0.03 0.08 0.074 |I O | | | | 3.00

23.500 0.03 0.08 0.074 |I O | | | | 2.99

23.583 0.03 0.08 0.073 |I O | | | | 2.98

23.667 0.03 0.07 0.073 |I O | | | | 2.97

23.750 0.03 0.07 0.073 |I O | | | | 2.96

23.833 0.03 0.07 0.073 |I O | | | | 2.95

23.917 0.03 0.07 0.072 |I O | | | | 2.94

24.000 0.03 0.07 0.072 |I O | | | | 2.94

24.083 0.02 0.07 0.072 |I O | | | | 2.93

24.167 0.01 0.06 0.071 I O | | | | 2.92

24.250 0.00 0.06 0.071 I O | | | | 2.90

24.333 0.00 0.06 0.071 I O | | | | 2.89

24.417 0.00 0.06 0.070 I O | | | | 2.88

24.500 0.00 0.06 0.070 I O | | | | 2.87

24.583 0.00 0.06 0.069 I O | | | | 2.85

24.667 0.00 0.05 0.069 I O | | | | 2.84

24.750 0.00 0.05 0.069 I O | | | | 2.83

24.833 0.00 0.05 0.068 I O | | | | 2.82

24.917 0.00 0.05 0.068 I O | | | | 2.81

25.000 0.00 0.05 0.068 I O | | | | 2.80

25.083 0.00 0.05 0.067 I O | | | | 2.79

25.167 0.00 0.04 0.067 I O | | | | 2.78

25.250 0.00 0.04 0.067 I O | | | | 2.77

25.333 0.00 0.04 0.066 I O | | | | 2.76

25.417 0.00 0.04 0.066 I O | | | | 2.75

25.500 0.00 0.04 0.066 I O | | | | 2.74

25.583 0.00 0.04 0.066 I O | | | | 2.74

25.667 0.00 0.04 0.065 I O | | | | 2.73

25.750 0.00 0.03 0.065 I O | | | | 2.72

25.833 0.00 0.03 0.065 I O | | | | 2.71

25.917 0.00 0.03 0.065 I O | | | | 2.71

26.000 0.00 0.03 0.064 I O | | | | 2.70

26.083 0.00 0.03 0.064 I O | | | | 2.69

26.167 0.00 0.03 0.064 I O | | | | 2.69

26.250 0.00 0.03 0.064 IO | | | | 2.68

26.333 0.00 0.03 0.064 IO | | | | 2.67

26.417 0.00 0.03 0.063 IO | | | | 2.67

26.500 0.00 0.03 0.063 IO | | | | 2.66

26.583 0.00 0.02 0.063 IO | | | | 2.66

26.667 0.00 0.02 0.063 IO | | | | 2.65

26.750 0.00 0.02 0.063 IO | | | | 2.65

26.833 0.00 0.02 0.063 IO | | | | 2.64

26.917 0.00 0.02 0.062 IO | | | | 2.64

27.000 0.00 0.02 0.062 IO | | | | 2.63 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

27.083 0.00 0.02 0.062 IO | | | | 2.63

27.167 0.00 0.02 0.062 IO | | | | 2.62

27.250 0.00 0.02 0.062 IO | | | | 2.62

27.333 0.00 0.02 0.062 IO | | | | 2.62

27.417 0.00 0.02 0.062 IO | | | | 2.61

27.500 0.00 0.02 0.061 IO | | | | 2.61

27.583 0.00 0.02 0.061 IO | | | | 2.61

27.667 0.00 0.02 0.061 IO | | | | 2.60

27.750 0.00 0.02 0.061 IO | | | | 2.60

27.833 0.00 0.01 0.061 IO | | | | 2.60

27.917 0.00 0.01 0.061 IO | | | | 2.59

28.000 0.00 0.01 0.061 O | | | | 2.59

28.083 0.00 0.01 0.061 O | | | | 2.59

28.167 0.00 0.01 0.061 O | | | | 2.58

28.250 0.00 0.01 0.061 O | | | | 2.58

28.333 0.00 0.01 0.060 O | | | | 2.58

28.417 0.00 0.01 0.060 O | | | | 2.58

28.500 0.00 0.01 0.060 O | | | | 2.57

28.583 0.00 0.01 0.060 O | | | | 2.57

28.667 0.00 0.01 0.060 O | | | | 2.57

28.750 0.00 0.01 0.060 O | | | | 2.57

28.833 0.00 0.01 0.060 O | | | | 2.56

28.917 0.00 0.01 0.060 O | | | | 2.56

29.000 0.00 0.01 0.060 O | | | | 2.56

29.083 0.00 0.01 0.060 O | | | | 2.56

29.167 0.00 0.01 0.060 O | | | | 2.56

29.250 0.00 0.01 0.060 O | | | | 2.55

29.333 0.00 0.01 0.060 O | | | | 2.55

29.417 0.00 0.01 0.060 O | | | | 2.55

29.500 0.00 0.01 0.060 O | | | | 2.55

29.583 0.00 0.01 0.060 O | | | | 2.55

29.667 0.00 0.01 0.059 O | | | | 2.55

29.750 0.00 0.01 0.059 O | | | | 2.54

29.833 0.00 0.01 0.059 O | | | | 2.54

29.917 0.00 0.01 0.059 O | | | | 2.54

30.000 0.00 0.01 0.059 O | | | | 2.54

30.083 0.00 0.01 0.059 O | | | | 2.54

30.167 0.00 0.01 0.059 O | | | | 2.54

30.250 0.00 0.01 0.059 O | | | | 2.54

30.333 0.00 0.01 0.059 O | | | | 2.53

30.417 0.00 0.01 0.059 O | | | | 2.53

30.500 0.00 0.01 0.059 O | | | | 2.53

30.583 0.00 0.00 0.059 O | | | | 2.53

30.667 0.00 0.00 0.059 O | | | | 2.53

30.750 0.00 0.00 0.059 O | | | | 2.53

30.833 0.00 0.00 0.059 O | | | | 2.53

30.917 0.00 0.00 0.059 O | | | | 2.53

31.000 0.00 0.00 0.059 O | | | | 2.53

31.083 0.00 0.00 0.059 O | | | | 2.53

31.167 0.00 0.00 0.059 O | | | | 2.52

31.250 0.00 0.00 0.059 O | | | | 2.52 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

31.333 0.00 0.00 0.059 O | | | | 2.52

31.417 0.00 0.00 0.059 O | | | | 2.52

31.500 0.00 0.00 0.059 O | | | | 2.52

31.583 0.00 0.00 0.059 O | | | | 2.52

31.667 0.00 0.00 0.059 O | | | | 2.52

31.750 0.00 0.00 0.059 O | | | | 2.52

31.833 0.00 0.00 0.059 O | | | | 2.52

31.917 0.00 0.00 0.059 O | | | | 2.52

32.000 0.00 0.00 0.059 O | | | | 2.52

32.083 0.00 0.00 0.059 O | | | | 2.52

32.167 0.00 0.00 0.059 O | | | | 2.52

32.250 0.00 0.00 0.059 O | | | | 2.52

32.333 0.00 0.00 0.058 O | | | | 2.52

32.417 0.00 0.00 0.058 O | | | | 2.52

32.500 0.00 0.00 0.058 O | | | | 2.51

32.583 0.00 0.00 0.058 O | | | | 2.51

32.667 0.00 0.00 0.058 O | | | | 2.51

32.750 0.00 0.00 0.058 O | | | | 2.51

32.833 0.00 0.00 0.058 O | | | | 2.51

32.917 0.00 0.00 0.058 O | | | | 2.51

33.000 0.00 0.00 0.058 O | | | | 2.51

33.083 0.00 0.00 0.058 O | | | | 2.51

33.167 0.00 0.00 0.058 O | | | | 2.51

33.250 0.00 0.00 0.058 O | | | | 2.51

33.333 0.00 0.00 0.058 O | | | | 2.51

33.417 0.00 0.00 0.058 O | | | | 2.51

33.500 0.00 0.00 0.058 O | | | | 2.51

33.583 0.00 0.00 0.058 O | | | | 2.51

33.667 0.00 0.00 0.058 O | | | | 2.51

33.750 0.00 0.00 0.058 O | | | | 2.51

33.833 0.00 0.00 0.058 O | | | | 2.51

33.917 0.00 0.00 0.058 O | | | | 2.51

34.000 0.00 0.00 0.058 O | | | | 2.51

34.083 0.00 0.00 0.058 O | | | | 2.51

34.167 0.00 0.00 0.058 O | | | | 2.51

34.250 0.00 0.00 0.058 O | | | | 2.51

34.333 0.00 0.00 0.058 O | | | | 2.51

34.417 0.00 0.00 0.058 O | | | | 2.51

34.500 0.00 0.00 0.058 O | | | | 2.51

34.583 0.00 0.00 0.058 O | | | | 2.51 Remaining water in basin = 0.06 (Ac.Ft)
****************************HYDROGRAPH DATA**************************** Number of intervals = 415
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 0.247 (CFS)
Total volume = 0.222 (Ac.Ft)
Status of hydrographs being held in storage
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** -------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

FLOOD HYDROGRAPH ROUTING PROGRAM
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018
Study date: 01/21/25
---------------------------------------------------------------------

RCH GARAGE
100-YR 1-HR
DMA-A BMP-1

KIMLEY-HORN
-------------------------------------------------------------------- Program License Serial Number 6443
-------------------------------------------------------------------- ********************* HYDROGRAPH INFORMATION ********************** From study/file name: rchph1a1100.rte
****************************HYDROGRAPH DATA**************************** Number of intervals = 19
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 5.250 (CFS)
Total volume = 0.158 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 0.000 to Point/Station 0.000 **** RETARDING BASIN ROUTING ****
______________________________________________________________________ User entry of depth-outflow-storage data
-------------------------------------------------------------------- Total number of inflow hydrograph intervals = 19
Hydrograph time unit = 5.000 (Min.)
Initial depth in storage basin = 0.00(Ft.)
-------------------------------------------------------------------- -------------------------------------------------------------------- Initial basin depth = 0.00 (Ft.)
Initial basin storage = 0.00 (Ac.Ft)
Initial basin outflow = 0.00 (CFS)
--------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices -------------------------------------------------------------------- Depth vs. Storage and Depth vs. Discharge data:

Basin Depth Storage Outflow (S-O*dt/2) (S+O*dt/2) (Ft.) (Ac.Ft) (CFS) (Ac.Ft) (Ac.Ft)
---------------------------------------------------------------------

0.000 0.000 0.000 0.000 0.000

0.500 0.008 0.001 0.008 0.008

1.000 0.017 0.001 0.017 0.017

1.500 0.028 0.000 0.028 0.028

2.000 0.042 0.000 0.042 0.042

2.500 0.058 0.000 0.058 0.058

3.000 0.074 0.078 0.074 0.074

3.500 0.091 0.140 0.091 0.091

4.000 0.108 0.182 0.107 0.109

4.500 0.126 0.216 0.125 0.127

5.000 0.143 0.245 0.142 0.144

5.500 0.160 0.271 0.159 0.161

6.000 0.177 0.295 0.176 0.178

6.500 0.194 0.317 0.193 0.195

7.000 0.209 0.337 0.208 0.210

7.500 0.223 0.357 0.222 0.224

8.000 0.234 0.443 0.232 0.236

8.500 0.243 0.493 0.241 0.245

9.000 0.251 0.534 0.249 0.253

0.083 0.07 0.00 0.000 O | | | | 0.01

0.167 0.43 0.00 0.002 O I | | | | 0.12

0.250 0.69 0.00 0.006 O I | | | | 0.36

0.333 0.83 0.00 0.011 O I | | | | 0.67

0.417 0.95 0.00 0.017 O I | | | | 1.01

0.500 1.08 0.00 0.024 O I | | | | 1.33

0.583 1.27 0.00 0.032 O I| | | | 1.65

0.667 1.48 0.00 0.042 O I | | | 1.99

0.750 1.94 0.00 0.053 O | I | | | 2.36

0.833 3.24 0.06 0.071 O | | I | | 2.91

0.917 5.25 0.16 0.100 O | | | I 3.75

1.000 3.02 0.22 0.127 |O | | I | | 4.52

1.083 1.61 0.24 0.141 |O |I | | | 4.95

1.167 0.68 0.25 0.147 |O I | | | | 5.13

1.250 0.26 0.25 0.149 |O | | | | 5.17

1.333 0.12 0.25 0.148 IO | | | | 5.16

1.417 0.06 0.25 0.147 IO | | | | 5.12

1.500 0.01 0.25 0.146 IO | | | | 5.08 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

1.583 0.00 0.25 0.144 IO | | | | 5.03

1.667 0.00 0.24 0.142 IO | | | | 4.98

1.750 0.00 0.24 0.141 IO | | | | 4.94

1.833 0.00 0.24 0.139 IO | | | | 4.89

1.917 0.00 0.24 0.138 IO | | | | 4.84

2.000 0.00 0.23 0.136 IO | | | | 4.79

2.083 0.00 0.23 0.134 IO | | | | 4.74

2.167 0.00 0.23 0.133 IO | | | | 4.70

2.250 0.00 0.22 0.131 IO | | | | 4.65

2.333 0.00 0.22 0.130 IO | | | | 4.61

2.417 0.00 0.22 0.128 IO | | | | 4.56

2.500 0.00 0.22 0.127 IO | | | | 4.52

2.583 0.00 0.21 0.125 IO | | | | 4.48

2.667 0.00 0.21 0.124 IO | | | | 4.43

2.750 0.00 0.21 0.122 IO | | | | 4.39

2.833 0.00 0.21 0.121 IO | | | | 4.35

2.917 0.00 0.20 0.119 IO | | | | 4.32

3.000 0.00 0.20 0.118 IO | | | | 4.28

3.083 0.00 0.20 0.117 IO | | | | 4.24

3.167 0.00 0.20 0.115 IO | | | | 4.20

3.250 0.00 0.19 0.114 IO | | | | 4.16

3.333 0.00 0.19 0.113 IO | | | | 4.13

3.417 0.00 0.19 0.111 IO | | | | 4.09

3.500 0.00 0.19 0.110 IO | | | | 4.06

3.583 0.00 0.18 0.109 IO | | | | 4.02

3.667 0.00 0.18 0.107 IO | | | | 3.98

3.750 0.00 0.18 0.106 IO | | | | 3.95

3.833 0.00 0.17 0.105 IO | | | | 3.91

3.917 0.00 0.17 0.104 IO | | | | 3.88

4.000 0.00 0.17 0.103 IO | | | | 3.84

4.083 0.00 0.17 0.101 IO | | | | 3.81

4.167 0.00 0.16 0.100 O | | | | 3.78

4.250 0.00 0.16 0.099 O | | | | 3.74

4.333 0.00 0.16 0.098 O | | | | 3.71

4.417 0.00 0.16 0.097 O | | | | 3.68

4.500 0.00 0.15 0.096 O | | | | 3.65

4.583 0.00 0.15 0.095 O | | | | 3.62

4.667 0.00 0.15 0.094 O | | | | 3.59

4.750 0.00 0.14 0.093 O | | | | 3.56

4.833 0.00 0.14 0.092 O | | | | 3.53

4.917 0.00 0.14 0.091 O | | | | 3.50

5.000 0.00 0.14 0.090 O | | | | 3.47

5.083 0.00 0.13 0.089 O | | | | 3.44

5.167 0.00 0.13 0.088 O | | | | 3.42

5.250 0.00 0.13 0.087 O | | | | 3.39

5.333 0.00 0.12 0.086 O | | | | 3.37

5.417 0.00 0.12 0.086 O | | | | 3.34

5.500 0.00 0.12 0.085 O | | | | 3.32

5.583 0.00 0.11 0.084 O | | | | 3.29

5.667 0.00 0.11 0.083 O | | | | 3.27

5.750 0.00 0.11 0.082 O | | | | 3.25 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

5.833 0.00 0.11 0.082 O | | | | 3.23

5.917 0.00 0.10 0.081 O | | | | 3.21

6.000 0.00 0.10 0.080 O | | | | 3.19

6.083 0.00 0.10 0.080 O | | | | 3.17

6.167 0.00 0.10 0.079 O | | | | 3.15

6.250 0.00 0.09 0.078 O | | | | 3.13

6.333 0.00 0.09 0.078 O | | | | 3.11

6.417 0.00 0.09 0.077 O | | | | 3.09

6.500 0.00 0.09 0.076 O | | | | 3.07

6.583 0.00 0.08 0.076 O | | | | 3.05

6.667 0.00 0.08 0.075 O | | | | 3.04

6.750 0.00 0.08 0.075 O | | | | 3.02

6.833 0.00 0.08 0.074 O | | | | 3.00

6.917 0.00 0.08 0.074 O | | | | 2.99

7.000 0.00 0.07 0.073 O | | | | 2.97

7.083 0.00 0.07 0.073 O | | | | 2.96

7.167 0.00 0.07 0.072 O | | | | 2.94

7.250 0.00 0.07 0.072 O | | | | 2.93

7.333 0.00 0.06 0.071 O | | | | 2.91

7.417 0.00 0.06 0.071 O | | | | 2.90

7.500 0.00 0.06 0.070 O | | | | 2.89

7.583 0.00 0.06 0.070 O | | | | 2.87

7.667 0.00 0.06 0.070 O | | | | 2.86

7.750 0.00 0.05 0.069 O | | | | 2.85

7.833 0.00 0.05 0.069 O | | | | 2.84

7.917 0.00 0.05 0.068 O | | | | 2.83

8.000 0.00 0.05 0.068 O | | | | 2.82

8.083 0.00 0.05 0.068 O | | | | 2.80

8.167 0.00 0.05 0.067 O | | | | 2.79

8.250 0.00 0.04 0.067 O | | | | 2.79

8.333 0.00 0.04 0.067 O | | | | 2.78

8.417 0.00 0.04 0.067 O | | | | 2.77

8.500 0.00 0.04 0.066 O | | | | 2.76

8.583 0.00 0.04 0.066 O | | | | 2.75

8.667 0.00 0.04 0.066 O | | | | 2.74

8.750 0.00 0.04 0.065 O | | | | 2.73

8.833 0.00 0.04 0.065 O | | | | 2.73

8.917 0.00 0.03 0.065 O | | | | 2.72

9.000 0.00 0.03 0.065 O | | | | 2.71

9.083 0.00 0.03 0.065 O | | | | 2.70

9.167 0.00 0.03 0.064 O | | | | 2.70

9.250 0.00 0.03 0.064 O | | | | 2.69

9.333 0.00 0.03 0.064 O | | | | 2.68

9.417 0.00 0.03 0.064 O | | | | 2.68

9.500 0.00 0.03 0.064 O | | | | 2.67

9.583 0.00 0.03 0.063 O | | | | 2.67

9.667 0.00 0.03 0.063 O | | | | 2.66

9.750 0.00 0.02 0.063 O | | | | 2.66

9.833 0.00 0.02 0.063 O | | | | 2.65

9.917 0.00 0.02 0.063 O | | | | 2.65

10.000 0.00 0.02 0.063 O | | | | 2.64 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

10.083 0.00 0.02 0.062 O | | | | 2.64

10.167 0.00 0.02 0.062 O | | | | 2.63

10.250 0.00 0.02 0.062 O | | | | 2.63

10.333 0.00 0.02 0.062 O | | | | 2.62

10.417 0.00 0.02 0.062 O | | | | 2.62

10.500 0.00 0.02 0.062 O | | | | 2.62

10.583 0.00 0.02 0.062 O | | | | 2.61

10.667 0.00 0.02 0.061 O | | | | 2.61

10.750 0.00 0.02 0.061 O | | | | 2.60

10.833 0.00 0.02 0.061 O | | | | 2.60

10.917 0.00 0.02 0.061 O | | | | 2.60

11.000 0.00 0.01 0.061 O | | | | 2.59

11.083 0.00 0.01 0.061 O | | | | 2.59

11.167 0.00 0.01 0.061 O | | | | 2.59

11.250 0.00 0.01 0.061 O | | | | 2.59

11.333 0.00 0.01 0.061 O | | | | 2.58

11.417 0.00 0.01 0.061 O | | | | 2.58

11.500 0.00 0.01 0.060 O | | | | 2.58

11.583 0.00 0.01 0.060 O | | | | 2.57

11.667 0.00 0.01 0.060 O | | | | 2.57

11.750 0.00 0.01 0.060 O | | | | 2.57

11.833 0.00 0.01 0.060 O | | | | 2.57

11.917 0.00 0.01 0.060 O | | | | 2.57

12.000 0.00 0.01 0.060 O | | | | 2.56

12.083 0.00 0.01 0.060 O | | | | 2.56

12.167 0.00 0.01 0.060 O | | | | 2.56

12.250 0.00 0.01 0.060 O | | | | 2.56

12.333 0.00 0.01 0.060 O | | | | 2.56

12.417 0.00 0.01 0.060 O | | | | 2.55

12.500 0.00 0.01 0.060 O | | | | 2.55

12.583 0.00 0.01 0.060 O | | | | 2.55

12.667 0.00 0.01 0.060 O | | | | 2.55

12.750 0.00 0.01 0.059 O | | | | 2.55

12.833 0.00 0.01 0.059 O | | | | 2.54

12.917 0.00 0.01 0.059 O | | | | 2.54

13.000 0.00 0.01 0.059 O | | | | 2.54

13.083 0.00 0.01 0.059 O | | | | 2.54

13.167 0.00 0.01 0.059 O | | | | 2.54

13.250 0.00 0.01 0.059 O | | | | 2.54

13.333 0.00 0.01 0.059 O | | | | 2.54

13.417 0.00 0.01 0.059 O | | | | 2.54

13.500 0.00 0.01 0.059 O | | | | 2.53

13.583 0.00 0.01 0.059 O | | | | 2.53

13.667 0.00 0.01 0.059 O | | | | 2.53

13.750 0.00 0.00 0.059 O | | | | 2.53

13.833 0.00 0.00 0.059 O | | | | 2.53

13.917 0.00 0.00 0.059 O | | | | 2.53

14.000 0.00 0.00 0.059 O | | | | 2.53

14.083 0.00 0.00 0.059 O | | | | 2.53

14.167 0.00 0.00 0.059 O | | | | 2.53

14.250 0.00 0.00 0.059 O | | | | 2.53 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

14.333 0.00 0.00 0.059 O | | | | 2.52

14.417 0.00 0.00 0.059 O | | | | 2.52

14.500 0.00 0.00 0.059 O | | | | 2.52

14.583 0.00 0.00 0.059 O | | | | 2.52

14.667 0.00 0.00 0.059 O | | | | 2.52

14.750 0.00 0.00 0.059 O | | | | 2.52

14.833 0.00 0.00 0.059 O | | | | 2.52

14.917 0.00 0.00 0.059 O | | | | 2.52

15.000 0.00 0.00 0.059 O | | | | 2.52

15.083 0.00 0.00 0.059 O | | | | 2.52

15.167 0.00 0.00 0.059 O | | | | 2.52

15.250 0.00 0.00 0.059 O | | | | 2.52

15.333 0.00 0.00 0.059 O | | | | 2.52

15.417 0.00 0.00 0.059 O | | | | 2.52

15.500 0.00 0.00 0.058 O | | | | 2.52

15.583 0.00 0.00 0.058 O | | | | 2.51

15.667 0.00 0.00 0.058 O | | | | 2.51

15.750 0.00 0.00 0.058 O | | | | 2.51

15.833 0.00 0.00 0.058 O | | | | 2.51

15.917 0.00 0.00 0.058 O | | | | 2.51

16.000 0.00 0.00 0.058 O | | | | 2.51

16.083 0.00 0.00 0.058 O | | | | 2.51

16.167 0.00 0.00 0.058 O | | | | 2.51

16.250 0.00 0.00 0.058 O | | | | 2.51

16.333 0.00 0.00 0.058 O | | | | 2.51

16.417 0.00 0.00 0.058 O | | | | 2.51

16.500 0.00 0.00 0.058 O | | | | 2.51

16.583 0.00 0.00 0.058 O | | | | 2.51

16.667 0.00 0.00 0.058 O | | | | 2.51

16.750 0.00 0.00 0.058 O | | | | 2.51

16.833 0.00 0.00 0.058 O | | | | 2.51

16.917 0.00 0.00 0.058 O | | | | 2.51

17.000 0.00 0.00 0.058 O | | | | 2.51

17.083 0.00 0.00 0.058 O | | | | 2.51

17.167 0.00 0.00 0.058 O | | | | 2.51

17.250 0.00 0.00 0.058 O | | | | 2.51

17.333 0.00 0.00 0.058 O | | | | 2.51

17.417 0.00 0.00 0.058 O | | | | 2.51

17.500 0.00 0.00 0.058 O | | | | 2.51

17.583 0.00 0.00 0.058 O | | | | 2.51

17.667 0.00 0.00 0.058 O | | | | 2.51

17.750 0.00 0.00 0.058 O | | | | 2.51 Remaining water in basin = 0.06 (Ac.Ft)
****************************HYDROGRAPH DATA**************************** Number of intervals = 213
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 0.254 (CFS)
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices Total volume = 0.100 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** -------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

FLOOD HYDROGRAPH ROUTING PROGRAM
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2018
Study date: 01/21/25
---------------------------------------------------------------------

RCH GARAGE
100-YEAR 24-HR
DMA-A BMP-1

KIMLEY-HORN
-------------------------------------------------------------------- Program License Serial Number 6443
-------------------------------------------------------------------- ********************* HYDROGRAPH INFORMATION ********************** From study/file name: RCHPH1A24100.rte
****************************HYDROGRAPH DATA**************************** Number of intervals = 295
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 0.872 (CFS)
Total volume = 0.461 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 0.000 to Point/Station 0.000 **** RETARDING BASIN ROUTING ****
______________________________________________________________________ User entry of depth-outflow-storage data
-------------------------------------------------------------------- Total number of inflow hydrograph intervals = 295
Hydrograph time unit = 5.000 (Min.)
Initial depth in storage basin = 0.00(Ft.)
-------------------------------------------------------------------- -------------------------------------------------------------------- Initial basin depth = 0.00 (Ft.)
Initial basin storage = 0.00 (Ac.Ft)
Initial basin outflow = 0.00 (CFS)
--------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices -------------------------------------------------------------------- Depth vs. Storage and Depth vs. Discharge data:

Basin Depth Storage Outflow (S-O*dt/2) (S+O*dt/2) (Ft.) (Ac.Ft) (CFS) (Ac.Ft) (Ac.Ft)
---------------------------------------------------------------------

0.000 0.000 0.000 0.000 0.000

0.500 0.008 0.001 0.008 0.008

1.000 0.017 0.001 0.017 0.017

1.500 0.028 0.000 0.028 0.028

2.000 0.042 0.000 0.042 0.042

2.500 0.058 0.000 0.058 0.058

3.000 0.074 0.078 0.074 0.074

3.500 0.091 0.140 0.091 0.091

4.000 0.108 0.182 0.107 0.109

4.500 0.126 0.216 0.125 0.127

5.000 0.143 0.245 0.142 0.144

5.500 0.160 0.271 0.159 0.161

6.000 0.177 0.295 0.176 0.178

6.500 0.194 0.317 0.193 0.195

7.000 0.209 0.337 0.208 0.210

7.500 0.223 0.357 0.222 0.224

8.000 0.234 0.443 0.232 0.236

8.500 0.243 0.493 0.241 0.245

9.000 0.251 0.534 0.249 0.253

0.083 0.00 0.00 0.000 O | | | | 0.00

0.167 0.03 0.00 0.000 O | | | | 0.01

0.250 0.04 0.00 0.000 OI | | | | 0.02

0.333 0.04 0.00 0.001 OI | | | | 0.04

0.417 0.05 0.00 0.001 OI | | | | 0.06

0.500 0.06 0.00 0.001 O I | | | | 0.08

0.583 0.06 0.00 0.002 O I | | | | 0.11

0.667 0.06 0.00 0.002 O I | | | | 0.13

0.750 0.06 0.00 0.003 O I | | | | 0.16

0.833 0.06 0.00 0.003 O I | | | | 0.19

0.917 0.08 0.00 0.004 O I | | | | 0.22

1.000 0.08 0.00 0.004 O I | | | | 0.25

1.083 0.08 0.00 0.005 O I | | | | 0.29

1.167 0.07 0.00 0.005 O I | | | | 0.32

1.250 0.07 0.00 0.006 O I | | | | 0.35

1.333 0.06 0.00 0.006 O I | | | | 0.38

1.417 0.06 0.00 0.006 O I | | | | 0.40

1.500 0.06 0.00 0.007 O I | | | | 0.43 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

1.583 0.06 0.00 0.007 O I | | | | 0.46

1.667 0.06 0.00 0.008 O I | | | | 0.48

1.750 0.06 0.00 0.008 O I | | | | 0.51

1.833 0.07 0.00 0.009 O I | | | | 0.53

1.917 0.08 0.00 0.009 O I | | | | 0.56

2.000 0.08 0.00 0.010 O I | | | | 0.59

2.083 0.08 0.00 0.010 O I | | | | 0.62

2.167 0.08 0.00 0.011 O I | | | | 0.65

2.250 0.08 0.00 0.011 O I | | | | 0.68

2.333 0.08 0.00 0.012 O I | | | | 0.71

2.417 0.08 0.00 0.012 O I | | | | 0.75

2.500 0.08 0.00 0.013 O I | | | | 0.78

2.583 0.09 0.00 0.014 O I | | | | 0.81

2.667 0.10 0.00 0.014 O I | | | | 0.84

2.750 0.10 0.00 0.015 O I | | | | 0.88

2.833 0.10 0.00 0.016 O I | | | | 0.92

2.917 0.10 0.00 0.016 O I | | | | 0.96

3.000 0.10 0.00 0.017 O I | | | | 1.00

3.083 0.10 0.00 0.018 O I | | | | 1.03

3.167 0.10 0.00 0.018 O I | | | | 1.06

3.250 0.10 0.00 0.019 O I | | | | 1.10

3.333 0.10 0.00 0.020 O I | | | | 1.13

3.417 0.10 0.00 0.021 O I | | | | 1.16

3.500 0.10 0.00 0.021 O I | | | | 1.19

3.583 0.10 0.00 0.022 O I | | | | 1.23

3.667 0.10 0.00 0.023 O I | | | | 1.26

3.750 0.10 0.00 0.023 O I | | | | 1.29

3.833 0.11 0.00 0.024 O I | | | | 1.33

3.917 0.12 0.00 0.025 O I | | | | 1.36

4.000 0.12 0.00 0.026 O I | | | | 1.40

4.083 0.12 0.00 0.027 O I | | | | 1.44

4.167 0.13 0.00 0.027 O I | | | | 1.48

4.250 0.13 0.00 0.028 O I | | | | 1.51

4.333 0.13 0.00 0.029 O I | | | | 1.54

4.417 0.14 0.00 0.030 O I | | | | 1.58

4.500 0.14 0.00 0.031 O I | | | | 1.61

4.583 0.15 0.00 0.032 O I | | | | 1.65

4.667 0.15 0.00 0.033 O I | | | | 1.68

4.750 0.15 0.00 0.034 O I | | | | 1.72

4.833 0.15 0.00 0.035 O I | | | | 1.75

4.917 0.16 0.00 0.036 O I | | | | 1.79

5.000 0.16 0.00 0.037 O I | | | | 1.83

5.083 0.16 0.00 0.038 O I | | | | 1.87

5.167 0.14 0.00 0.039 O I | | | | 1.91

5.250 0.13 0.00 0.040 O I | | | | 1.94

5.333 0.13 0.00 0.041 O I | | | | 1.98

5.417 0.14 0.00 0.042 O I | | | | 2.01

5.500 0.14 0.00 0.043 O I | | | | 2.04

5.583 0.15 0.00 0.044 O I | | | | 2.07

5.667 0.16 0.00 0.045 O I | | | | 2.10

5.750 0.16 0.00 0.046 O I | | | | 2.14 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

5.833 0.17 0.00 0.048 O I | | | | 2.17

5.917 0.17 0.00 0.049 O I | | | | 2.21

6.000 0.17 0.00 0.050 O I | | | | 2.24

6.083 0.17 0.00 0.051 O I | | | | 2.28

6.167 0.18 0.00 0.052 O I | | | | 2.32

6.250 0.19 0.00 0.053 O I | | | | 2.36

6.333 0.19 0.00 0.055 O I | | | | 2.40

6.417 0.19 0.00 0.056 O I | | | | 2.44

6.500 0.19 0.00 0.057 O I | | | | 2.48

6.583 0.19 0.00 0.059 O I| | | | 2.52

6.667 0.20 0.01 0.060 O I| | | | 2.56

6.750 0.21 0.02 0.061 O I| | | | 2.60

6.833 0.21 0.02 0.063 O I| | | | 2.64

6.917 0.21 0.03 0.064 |O I| | | | 2.68

7.000 0.21 0.03 0.065 |O I| | | | 2.72

7.083 0.21 0.04 0.066 |O I| | | | 2.76

7.167 0.21 0.05 0.067 |O I| | | | 2.79

7.250 0.21 0.05 0.068 |O I| | | | 2.83

7.333 0.21 0.06 0.070 | O I| | | | 2.86

7.417 0.22 0.06 0.071 | O I | | | 2.90

7.500 0.23 0.07 0.072 | O I | | | 2.93

7.583 0.23 0.07 0.073 | O I | | | 2.96

7.667 0.24 0.08 0.074 | O I | | | 3.00

7.750 0.25 0.08 0.075 | O |I | | | 3.03

7.833 0.25 0.09 0.076 | O |I | | | 3.07

7.917 0.26 0.09 0.077 | O |I | | | 3.10

8.000 0.27 0.09 0.079 | O |I | | | 3.14

8.083 0.28 0.10 0.080 | O | I | | | 3.17

8.167 0.30 0.10 0.081 | O | I | | | 3.21

8.250 0.31 0.11 0.082 | O | I | | | 3.25

8.333 0.31 0.11 0.084 | O | I | | | 3.29

8.417 0.31 0.12 0.085 | O | I | | | 3.33

8.500 0.31 0.12 0.087 | O | I | | | 3.37

8.583 0.32 0.13 0.088 | O | I | | | 3.41

8.667 0.33 0.13 0.089 | O | I | | | 3.44

8.750 0.33 0.14 0.090 | O | I | | | 3.48

8.833 0.34 0.14 0.092 | O | I | | | 3.52

8.917 0.35 0.15 0.093 | O | I | | | 3.56

9.000 0.35 0.15 0.095 | O | I | | | 3.60

9.083 0.36 0.15 0.096 | O | I | | | 3.65

9.167 0.38 0.16 0.097 | O | I | | | 3.69

9.250 0.39 0.16 0.099 | O | I | | | 3.74

9.333 0.40 0.16 0.101 | O | I | | | 3.78

9.417 0.41 0.17 0.102 | O | I| | | 3.83

9.500 0.42 0.17 0.104 | O | I| | | 3.88

9.583 0.42 0.18 0.106 | O | I| | | 3.93

9.667 0.43 0.18 0.107 | O | I| | | 3.98

9.750 0.44 0.18 0.109 | O | I | | 4.03

9.833 0.44 0.19 0.111 | O | I | | 4.08

9.917 0.45 0.19 0.113 | O| I | | 4.13

10.000 0.46 0.19 0.114 | O| I | | 4.18 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

10.083 0.45 0.20 0.116 | O| I | | 4.23

10.167 0.37 0.20 0.118 | O| I | | | 4.27

10.250 0.34 0.20 0.119 | O| I | | | 4.30

10.333 0.32 0.20 0.120 | O| I | | | 4.32

10.417 0.32 0.21 0.120 | O| I | | | 4.34

10.500 0.32 0.21 0.121 | O| I | | | 4.36

10.583 0.33 0.21 0.122 | O| I | | | 4.39

10.667 0.38 0.21 0.123 | O| I | | | 4.41

10.750 0.40 0.21 0.124 | O| I | | | 4.45

10.833 0.41 0.22 0.125 | O| I| | | 4.49

10.917 0.42 0.22 0.127 | O| I| | | 4.52

11.000 0.42 0.22 0.128 | O I| | | 4.57

11.083 0.42 0.22 0.130 | O I| | | 4.60

11.167 0.41 0.22 0.131 | O I | | | 4.64

11.250 0.40 0.23 0.132 | O I | | | 4.68

11.333 0.40 0.23 0.133 | O I | | | 4.71

11.417 0.40 0.23 0.134 | O I | | | 4.75

11.500 0.40 0.23 0.136 | O I | | | 4.78

11.583 0.39 0.23 0.137 | O I | | | 4.82

11.667 0.37 0.24 0.138 | O I | | | 4.85

11.750 0.36 0.24 0.139 | O I | | | 4.87

11.833 0.36 0.24 0.139 | O I | | | 4.90

11.917 0.37 0.24 0.140 | O I | | | 4.92

12.000 0.37 0.24 0.141 | O I | | | 4.95

12.083 0.40 0.24 0.142 | O I | | | 4.98

12.167 0.51 0.25 0.144 | |O | I | | 5.02

12.250 0.55 0.25 0.146 | |O | I | | 5.08

12.333 0.57 0.25 0.148 | |O | I | | 5.14

12.417 0.60 0.26 0.150 | |O | I | | 5.21

12.500 0.61 0.26 0.152 | |O | I | | 5.28

12.583 0.62 0.26 0.155 | |O | I | | 5.35

12.667 0.66 0.27 0.157 | |O | I | 5.42

12.750 0.67 0.27 0.160 | |O | I | 5.50

12.833 0.68 0.28 0.163 | | O | I | 5.59

12.917 0.70 0.28 0.166 | | O | |I | 5.67

13.000 0.71 0.28 0.169 | | O | | I | 5.76

13.083 0.73 0.29 0.172 | | O | | I | 5.84

13.167 0.81 0.29 0.175 | | O | | I | 5.94

13.250 0.85 0.30 0.179 | | O | | I| 6.05

13.333 0.86 0.30 0.182 | | O | | I| 6.16

13.417 0.87 0.31 0.186 | | O | | I| 6.28

13.500 0.87 0.31 0.190 | | O | | I 6.39

13.583 0.84 0.32 0.194 | | O | | I | 6.50

13.667 0.66 0.32 0.197 | | O | I | 6.60

13.750 0.59 0.32 0.199 | | O | I | | 6.67

13.833 0.56 0.33 0.201 | | O | I | | 6.72

13.917 0.55 0.33 0.202 | | O | I | | 6.78

14.000 0.54 0.33 0.204 | | O | I | | 6.83

14.083 0.56 0.33 0.205 | | O | I | | 6.88

14.167 0.62 0.33 0.207 | | O | I | | 6.93

14.250 0.65 0.34 0.209 | | O | I| | 7.00 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

14.333 0.66 0.34 0.211 | | O | I | 7.08

14.417 0.64 0.34 0.213 | | O | I| | 7.16

14.500 0.64 0.35 0.215 | | O | I| | 7.23

14.583 0.64 0.35 0.217 | | O | I| | 7.30

14.667 0.64 0.35 0.219 | | O | I| | 7.37

14.750 0.64 0.35 0.221 | | O | I| | 7.44

14.833 0.64 0.36 0.223 | | O | I| | 7.51

14.917 0.62 0.37 0.225 | | O | I | | 7.60

15.000 0.62 0.39 0.227 | | O | I | | 7.67

15.083 0.61 0.40 0.228 | | O | I | | 7.74

15.167 0.59 0.41 0.230 | | O| I | | 7.80

15.250 0.59 0.42 0.231 | | O| I | | 7.86

15.333 0.58 0.43 0.232 | | O| I | | 7.91

15.417 0.57 0.44 0.233 | | O| I | | 7.95

15.500 0.56 0.44 0.234 | | O I | | 7.99

15.583 0.54 0.45 0.235 | | O I | | 8.03

15.667 0.48 0.45 0.235 | | OI | | 8.06

15.750 0.45 0.45 0.235 | | O | | 8.06

15.833 0.44 0.45 0.235 | | O | | 8.06

15.917 0.44 0.45 0.235 | | O | | 8.06

16.000 0.44 0.45 0.235 | | O | | 8.06

16.083 0.40 0.45 0.235 | | I O | | 8.04

16.167 0.21 0.44 0.234 | I| O | | 7.99

16.250 0.14 0.43 0.232 | I | O| | | 7.91

16.333 0.11 0.41 0.230 | I | O| | | 7.82

16.417 0.09 0.40 0.228 | I | O | | | 7.72

16.500 0.09 0.38 0.226 | I | O | | | 7.63

16.583 0.08 0.36 0.224 | I | O | | | 7.54

16.667 0.07 0.36 0.222 | I | O | | | 7.46

16.750 0.07 0.35 0.220 | I | O | | | 7.39

16.833 0.06 0.35 0.218 | I | O | | | 7.32

16.917 0.06 0.35 0.216 | I | O | | | 7.25

17.000 0.06 0.34 0.214 | I | O | | | 7.18

17.083 0.07 0.34 0.212 | I | O | | | 7.11

17.167 0.09 0.34 0.210 | I | O | | | 7.05

17.250 0.10 0.34 0.209 | I | O | | | 6.99

17.333 0.10 0.33 0.207 | I | O | | | 6.94

17.417 0.10 0.33 0.206 | I | O | | | 6.88

17.500 0.10 0.33 0.204 | I | O | | | 6.83

17.583 0.10 0.33 0.202 | I | O | | | 6.78

17.667 0.10 0.33 0.201 | I | O | | | 6.73

17.750 0.10 0.32 0.199 | I | O | | | 6.68

17.833 0.10 0.32 0.198 | I | O | | | 6.63

17.917 0.09 0.32 0.196 | I | O | | | 6.58

18.000 0.09 0.32 0.195 | I | O | | | 6.52

18.083 0.09 0.32 0.193 | I | O | | | 6.47

18.167 0.08 0.31 0.192 | I | O | | | 6.43

18.250 0.08 0.31 0.190 | I | O | | | 6.38

18.333 0.08 0.31 0.188 | I | O | | | 6.34

18.417 0.08 0.31 0.187 | I | O | | | 6.29

18.500 0.08 0.31 0.185 | I | O | | | 6.24 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

18.583 0.08 0.30 0.184 | I | O | | | 6.20

18.667 0.07 0.30 0.182 | I | O | | | 6.15

18.750 0.07 0.30 0.181 | I | O | | | 6.11

18.833 0.06 0.30 0.179 | I | O | | | 6.06

18.917 0.05 0.30 0.177 |I | O | | | 6.01

19.000 0.05 0.29 0.176 |I | O | | | 5.96

19.083 0.05 0.29 0.174 |I | O | | | 5.91

19.167 0.06 0.29 0.172 | I | O | | | 5.86

19.250 0.06 0.29 0.171 | I | O | | | 5.82

19.333 0.06 0.28 0.169 | I | O | | | 5.77

19.417 0.08 0.28 0.168 | I | O | | | 5.73

19.500 0.08 0.28 0.166 | I | O | | | 5.69

19.583 0.08 0.28 0.165 | I | O | | | 5.65

19.667 0.07 0.28 0.164 | I | O | | | 5.60

19.750 0.07 0.27 0.162 | I | O | | | 5.56

19.833 0.06 0.27 0.161 | I |O | | | 5.52

19.917 0.05 0.27 0.159 |I |O | | | 5.48

20.000 0.05 0.27 0.158 |I |O | | | 5.43

20.083 0.05 0.27 0.156 |I |O | | | 5.39

20.167 0.06 0.26 0.155 | I |O | | | 5.34

20.250 0.06 0.26 0.153 | I |O | | | 5.30

20.333 0.06 0.26 0.152 | I |O | | | 5.26

20.417 0.06 0.26 0.151 | I |O | | | 5.22

20.500 0.06 0.25 0.149 | I |O | | | 5.18

20.583 0.06 0.25 0.148 | I |O | | | 5.15

20.667 0.06 0.25 0.147 | I |O | | | 5.11

20.750 0.06 0.25 0.145 | I |O | | | 5.07

20.833 0.06 0.25 0.144 | I |O | | | 5.03

20.917 0.05 0.24 0.143 |I O | | | 4.99

21.000 0.05 0.24 0.141 |I O | | | 4.95

21.083 0.05 0.24 0.140 |I O | | | 4.91

21.167 0.06 0.24 0.139 | I O | | | 4.88

21.250 0.06 0.24 0.138 | I O | | | 4.84

21.333 0.06 0.23 0.136 | I O | | | 4.80

21.417 0.05 0.23 0.135 |I O | | | 4.77

21.500 0.04 0.23 0.134 |I O | | | 4.73

21.583 0.05 0.23 0.133 |I O | | | 4.69

21.667 0.06 0.23 0.131 | I O | | | 4.66

21.750 0.06 0.22 0.130 | I O | | | 4.62

21.833 0.06 0.22 0.129 | I O | | | 4.59

21.917 0.05 0.22 0.128 |I O | | | 4.56

22.000 0.04 0.22 0.127 |I O| | | | 4.52

22.083 0.05 0.22 0.126 |I O| | | | 4.49

22.167 0.06 0.21 0.124 | I O| | | | 4.46

22.250 0.06 0.21 0.123 | I O| | | | 4.43

22.333 0.06 0.21 0.122 | I O| | | | 4.40

22.417 0.05 0.21 0.121 |I O| | | | 4.37

22.500 0.04 0.21 0.120 |I O| | | | 4.34

22.583 0.04 0.20 0.119 |I O| | | | 4.31

22.667 0.04 0.20 0.118 |I O| | | | 4.28

22.750 0.04 0.20 0.117 |I O| | | | 4.25 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

22.833 0.04 0.20 0.116 |I O| | | | 4.22

22.917 0.04 0.19 0.115 |I O| | | | 4.19

23.000 0.04 0.19 0.114 |I O| | | | 4.16

23.083 0.04 0.19 0.113 |I O| | | | 4.13

23.167 0.04 0.19 0.112 |I O | | | | 4.10

23.250 0.04 0.19 0.111 |I O | | | | 4.07

23.333 0.04 0.19 0.110 |I O | | | | 4.05

23.417 0.04 0.18 0.109 |I O | | | | 4.02

23.500 0.04 0.18 0.108 |I O | | | | 3.99

23.583 0.04 0.18 0.107 |I O | | | | 3.96

23.667 0.04 0.18 0.106 |I O | | | | 3.94

23.750 0.04 0.17 0.105 |I O | | | | 3.91

23.833 0.04 0.17 0.104 |I O | | | | 3.88

23.917 0.04 0.17 0.103 |I O | | | | 3.86

24.000 0.04 0.17 0.102 |I O | | | | 3.83

24.083 0.04 0.17 0.101 |I O | | | | 3.81

24.167 0.02 0.16 0.100 I O | | | | 3.78

24.250 0.01 0.16 0.099 I O | | | | 3.75

24.333 0.00 0.16 0.098 I O | | | | 3.72

24.417 0.00 0.16 0.097 I O | | | | 3.68

24.500 0.00 0.15 0.096 I O | | | | 3.65

24.583 0.00 0.15 0.095 I O | | | | 3.62

24.667 0.00 0.15 0.094 I O | | | | 3.59

24.750 0.00 0.15 0.093 I O | | | | 3.56

24.833 0.00 0.14 0.092 I O | | | | 3.53

24.917 0.00 0.14 0.091 I O | | | | 3.51

25.000 0.00 0.14 0.090 I O | | | | 3.48

25.083 0.00 0.13 0.089 I O | | | | 3.45

25.167 0.00 0.13 0.088 I O | | | | 3.42

25.250 0.00 0.13 0.087 I O | | | | 3.40

25.333 0.00 0.12 0.087 I O | | | | 3.37

25.417 0.00 0.12 0.086 I O | | | | 3.35

25.500 0.00 0.12 0.085 I O | | | | 3.32

25.583 0.00 0.12 0.084 I O | | | | 3.30

25.667 0.00 0.11 0.083 I O | | | | 3.28

25.750 0.00 0.11 0.083 I O | | | | 3.25

25.833 0.00 0.11 0.082 I O | | | | 3.23

25.917 0.00 0.10 0.081 I O | | | | 3.21

26.000 0.00 0.10 0.080 I O | | | | 3.19

26.083 0.00 0.10 0.080 I O | | | | 3.17

26.167 0.00 0.10 0.079 I O | | | | 3.15

26.250 0.00 0.09 0.078 I O | | | | 3.13

26.333 0.00 0.09 0.078 I O | | | | 3.11

26.417 0.00 0.09 0.077 I O | | | | 3.09

26.500 0.00 0.09 0.077 I O | | | | 3.07

26.583 0.00 0.09 0.076 I O | | | | 3.06

26.667 0.00 0.08 0.075 I O | | | | 3.04

26.750 0.00 0.08 0.075 I O | | | | 3.02

26.833 0.00 0.08 0.074 I O | | | | 3.01

26.917 0.00 0.08 0.074 I O | | | | 2.99

27.000 0.00 0.07 0.073 I O | | | | 2.97 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

27.083 0.00 0.07 0.073 I O | | | | 2.96

27.167 0.00 0.07 0.072 I O | | | | 2.94

27.250 0.00 0.07 0.072 I O | | | | 2.93

27.333 0.00 0.06 0.071 I O | | | | 2.92

27.417 0.00 0.06 0.071 I O | | | | 2.90

27.500 0.00 0.06 0.070 I O | | | | 2.89

27.583 0.00 0.06 0.070 I O | | | | 2.88

27.667 0.00 0.06 0.070 I O | | | | 2.86

27.750 0.00 0.05 0.069 I O | | | | 2.85

27.833 0.00 0.05 0.069 IO | | | | 2.84

27.917 0.00 0.05 0.069 IO | | | | 2.83

28.000 0.00 0.05 0.068 IO | | | | 2.82

28.083 0.00 0.05 0.068 IO | | | | 2.81

28.167 0.00 0.05 0.067 IO | | | | 2.80

28.250 0.00 0.04 0.067 IO | | | | 2.79

28.333 0.00 0.04 0.067 IO | | | | 2.78

28.417 0.00 0.04 0.067 IO | | | | 2.77

28.500 0.00 0.04 0.066 IO | | | | 2.76

28.583 0.00 0.04 0.066 IO | | | | 2.75

28.667 0.00 0.04 0.066 IO | | | | 2.74

28.750 0.00 0.04 0.066 IO | | | | 2.73

28.833 0.00 0.04 0.065 IO | | | | 2.73

28.917 0.00 0.03 0.065 IO | | | | 2.72

29.000 0.00 0.03 0.065 IO | | | | 2.71

29.083 0.00 0.03 0.065 IO | | | | 2.71

29.167 0.00 0.03 0.064 IO | | | | 2.70

29.250 0.00 0.03 0.064 IO | | | | 2.69

29.333 0.00 0.03 0.064 IO | | | | 2.69

29.417 0.00 0.03 0.064 IO | | | | 2.68

29.500 0.00 0.03 0.064 O | | | | 2.67

29.583 0.00 0.03 0.063 O | | | | 2.67

29.667 0.00 0.03 0.063 O | | | | 2.66

29.750 0.00 0.02 0.063 O | | | | 2.66

29.833 0.00 0.02 0.063 O | | | | 2.65

29.917 0.00 0.02 0.063 O | | | | 2.65

30.000 0.00 0.02 0.063 O | | | | 2.64

30.083 0.00 0.02 0.062 O | | | | 2.64

30.167 0.00 0.02 0.062 O | | | | 2.63

30.250 0.00 0.02 0.062 O | | | | 2.63

30.333 0.00 0.02 0.062 O | | | | 2.62

30.417 0.00 0.02 0.062 O | | | | 2.62

30.500 0.00 0.02 0.062 O | | | | 2.62

30.583 0.00 0.02 0.062 O | | | | 2.61

30.667 0.00 0.02 0.061 O | | | | 2.61

30.750 0.00 0.02 0.061 O | | | | 2.60

30.833 0.00 0.02 0.061 O | | | | 2.60

30.917 0.00 0.02 0.061 O | | | | 2.60

31.000 0.00 0.01 0.061 O | | | | 2.59

31.083 0.00 0.01 0.061 O | | | | 2.59

31.167 0.00 0.01 0.061 O | | | | 2.59

31.250 0.00 0.01 0.061 O | | | | 2.59 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

31.333 0.00 0.01 0.061 O | | | | 2.58

31.417 0.00 0.01 0.061 O | | | | 2.58

31.500 0.00 0.01 0.060 O | | | | 2.58

31.583 0.00 0.01 0.060 O | | | | 2.57

31.667 0.00 0.01 0.060 O | | | | 2.57

31.750 0.00 0.01 0.060 O | | | | 2.57

31.833 0.00 0.01 0.060 O | | | | 2.57

31.917 0.00 0.01 0.060 O | | | | 2.57

32.000 0.00 0.01 0.060 O | | | | 2.56

32.083 0.00 0.01 0.060 O | | | | 2.56

32.167 0.00 0.01 0.060 O | | | | 2.56

32.250 0.00 0.01 0.060 O | | | | 2.56

32.333 0.00 0.01 0.060 O | | | | 2.56

32.417 0.00 0.01 0.060 O | | | | 2.55

32.500 0.00 0.01 0.060 O | | | | 2.55

32.583 0.00 0.01 0.060 O | | | | 2.55

32.667 0.00 0.01 0.060 O | | | | 2.55

32.750 0.00 0.01 0.059 O | | | | 2.55

32.833 0.00 0.01 0.059 O | | | | 2.55

32.917 0.00 0.01 0.059 O | | | | 2.54

33.000 0.00 0.01 0.059 O | | | | 2.54

33.083 0.00 0.01 0.059 O | | | | 2.54

33.167 0.00 0.01 0.059 O | | | | 2.54

33.250 0.00 0.01 0.059 O | | | | 2.54

33.333 0.00 0.01 0.059 O | | | | 2.54

33.417 0.00 0.01 0.059 O | | | | 2.54

33.500 0.00 0.01 0.059 O | | | | 2.53

33.583 0.00 0.01 0.059 O | | | | 2.53

33.667 0.00 0.01 0.059 O | | | | 2.53

33.750 0.00 0.00 0.059 O | | | | 2.53

33.833 0.00 0.00 0.059 O | | | | 2.53

33.917 0.00 0.00 0.059 O | | | | 2.53

34.000 0.00 0.00 0.059 O | | | | 2.53

34.083 0.00 0.00 0.059 O | | | | 2.53

34.167 0.00 0.00 0.059 O | | | | 2.53

34.250 0.00 0.00 0.059 O | | | | 2.53

34.333 0.00 0.00 0.059 O | | | | 2.52

34.417 0.00 0.00 0.059 O | | | | 2.52

34.500 0.00 0.00 0.059 O | | | | 2.52

34.583 0.00 0.00 0.059 O | | | | 2.52

34.667 0.00 0.00 0.059 O | | | | 2.52

34.750 0.00 0.00 0.059 O | | | | 2.52

34.833 0.00 0.00 0.059 O | | | | 2.52

34.917 0.00 0.00 0.059 O | | | | 2.52

35.000 0.00 0.00 0.059 O | | | | 2.52

35.083 0.00 0.00 0.059 O | | | | 2.52

35.167 0.00 0.00 0.059 O | | | | 2.52

35.250 0.00 0.00 0.059 O | | | | 2.52

35.333 0.00 0.00 0.059 O | | | | 2.52

35.417 0.00 0.00 0.059 O | | | | 2.52

35.500 0.00 0.00 0.058 O | | | | 2.52 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

35.583 0.00 0.00 0.058 O | | | | 2.51

35.667 0.00 0.00 0.058 O | | | | 2.51

35.750 0.00 0.00 0.058 O | | | | 2.51

35.833 0.00 0.00 0.058 O | | | | 2.51

35.917 0.00 0.00 0.058 O | | | | 2.51

36.000 0.00 0.00 0.058 O | | | | 2.51

36.083 0.00 0.00 0.058 O | | | | 2.51

36.167 0.00 0.00 0.058 O | | | | 2.51

36.250 0.00 0.00 0.058 O | | | | 2.51

36.333 0.00 0.00 0.058 O | | | | 2.51

36.417 0.00 0.00 0.058 O | | | | 2.51

36.500 0.00 0.00 0.058 O | | | | 2.51

36.583 0.00 0.00 0.058 O | | | | 2.51

36.667 0.00 0.00 0.058 O | | | | 2.51

36.750 0.00 0.00 0.058 O | | | | 2.51

36.833 0.00 0.00 0.058 O | | | | 2.51

36.917 0.00 0.00 0.058 O | | | | 2.51

37.000 0.00 0.00 0.058 O | | | | 2.51

37.083 0.00 0.00 0.058 O | | | | 2.51

37.167 0.00 0.00 0.058 O | | | | 2.51

37.250 0.00 0.00 0.058 O | | | | 2.51

37.333 0.00 0.00 0.058 O | | | | 2.51

37.417 0.00 0.00 0.058 O | | | | 2.51

37.500 0.00 0.00 0.058 O | | | | 2.51

37.583 0.00 0.00 0.058 O | | | | 2.51

37.667 0.00 0.00 0.058 O | | | | 2.51

37.750 0.00 0.00 0.058 O | | | | 2.51 Remaining water in basin = 0.06 (Ac.Ft)
****************************HYDROGRAPH DATA**************************** Number of intervals = 453
Time interval = 5.0 (Min.)
Maximum/Peak flow rate = 0.449 (CFS)
Total volume = 0.403 (Ac.Ft)
Status of hydrographs being held in storage
Stream 1 Stream 2 Stream 3 Stream 4 Stream 5
Peak (CFS) 0.000 0.000 0.000 0.000 0.000 Vol (Ac.Ft) 0.000 0.000 0.000 0.000 0.000 *********************************************************************** -------------------------------------------------------------------- PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices 22 Riverside Community Hospital Phase 1 │ Preliminary Hydrology Report January 2025

Appendix J - Sizing Calculatio ns

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices 10 yr Gutter - B1
Project Description
SpreadSolve For
Input Data
%1.000Channel Slope
cfs2.05Discharge
ft1.0Gutter Width
%2.200Gutter Cross Slope
%1.800Road Cross Slope

0.015Roughness Coefficient
Results
ft9.8Spread
ft²0.9Flow Area
in2.2Depth
in0.0Gutter Depression
ft/s2.35Velocity

Page 1 of 1027 ends

Watertown, CT 06795 USA +1-203-755-1666
10/14/2024
FlowMaster
[10.03.00.03]
Bentley Systems, Inc. Haestad Methods Solution
CenterInlet and Street Capacity.fm8
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices Grate Inlet In Sag - A1
Project Description
SpreadSolve For
Input Data
cfs0.25Discharge
ft0.00Gutter Width
%0.000Gutter Cross Slope
%1.100Road Cross Slope
ft0.40Grate Width
ft0.4Grate Length
in1.0Local Depression
in1.0Local Depression Width
P-50 mm (P-1
-7/8")Grate Type
%50.0Clogging
Results
ft34.4Spread
in4.5Depth
in0.0Gutter Depression
in1.0Total Depression
ft²0.1Open Grate Area
ft0.8Active Grate Weir Length

Page 2 of 1027 ends

0.023Roughness Coefficient
ft1.00Grate Width
ft1.0Grate Length
P-50 mm (P-1
-7/8")Grate Type
%50.0Clogging
Options
Exclude NoneGrate Flow Option
Results
%99.35Efficiency
cfs0.08Intercepted Flow
cfs0.00Bypass Flow
ft1.2Spread
in1.4Depth
ft²0.1Flow Area
in0.0Gutter Depression
in0.0Total Depression
ft/s1.16Velocity
ft/s4.08Splash Over Velocity

1.000Frontal Flow Factor

0.092Side Flow Factor

0.993Grate Flow Ratio
ft0.5Active Grate Length

Page 3 of 1027 ends

0.015Roughness Coefficient
ft32.0Slot Length
in0.0Local Depression
in0.0Local Depression Width
Results
%100.00Efficiency
cfs0.50Intercepted Flow
cfs0.00Bypass Flow
ft4.9Spread
in1.3Depth
ft²0.3Flow Area
in0.0Gutter Depression
in0.0Total Depression
ft/s1.92Velocity
%2.200Equivalent Cross Slope

2.140Length Factor
ft15.0Total Interception Length

Page 4 of 1027 ends

0.015Roughness Coefficient
ft23.0Slot Length
in0.0Local Depression
in0.0Local Depression Width
Results
%100.00Efficiency
cfs0.03Intercepted Flow
cfs0.00Bypass Flow
ft7.0Spread
in0.2Depth
ft²0.0Flow Area
in0.0Gutter Depression
in0.0Total Depression
ft/s0.61Velocity
%0.200Equivalent Cross Slope

1.045Length Factor
ft22.0Total Interception Length

Page 5 of 1027 ends

0.023Roughness Coefficient
ft2.00Grate Width
ft2.0Grate Length
P-50 mm (P-1
-7/8")Grate Type
%50.0Clogging
Options
Exclude NoneGrate Flow Option
Results
%88.68Efficiency
cfs0.34Intercepted Flow
cfs0.04Bypass Flow
ft3.7Spread
in1.3Depth
ft²0.2Flow Area
in0.0Gutter Depression
in0.0Total Depression
ft/s1.90Velocity
ft/s5.66Splash Over Velocity

1.000Frontal Flow Factor

0.059Side Flow Factor

0.880Grate Flow Ratio
ft1.0Active Grate Length

Page 6 of 1027 ends

0.015Roughness Coefficient
Results
ft5.3Spread
ft²0.4Flow Area
in1.9Depth
in0.0Gutter Depression
ft/s2.20Velocity

Page 7 of 1027 ends

Watertown, CT 06795 USA +1-203-755-1666
10/14/2024
FlowMaster
[10.03.00.03]
Bentley Systems, Inc. Haestad Methods Solution
CenterInlet and Street Capacity.fm8
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices Grate Inlet In Sag - A6
Project Description
SpreadSolve For
Input Data
cfs0.08Discharge
ft0.00Gutter Width
%0.000Gutter Cross Slope
%1.100Road Cross Slope
ft0.40Grate Width
ft0.4Grate Length
in1.0Local Depression
in1.0Local Depression Width
P-50 mm (P-1
-7/8")Grate Type
%50.0Clogging
Results
ft7.3Spread
in1.0Depth
in0.0Gutter Depression
in1.0Total Depression
ft²0.1Open Grate Area
ft0.8Active Grate Weir Length

Page 8 of 1027 ends

Watertown, CT 06795 USA +1-203-755-1666
10/14/2024
FlowMaster
[10.03.00.03]
Bentley Systems, Inc. Haestad Methods Solution
CenterInlet and Street Capacity.fm8
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices Grate Inlet In Sag - A7
Project Description
SpreadSolve For
Input Data
cfs0.06Discharge
ft0.00Gutter Width
%0.000Gutter Cross Slope
%1.100Road Cross Slope
ft0.40Grate Width
ft0.4Grate Length
in1.0Local Depression
in1.0Local Depression Width
P-50 mm (P-1
-7/8")Grate Type
%50.0Clogging
Results
ft6.1Spread
in0.8Depth
in0.0Gutter Depression
in1.0Total Depression
ft²0.1Open Grate Area
ft0.8Active Grate Weir Length

Page 9 of 1027 ends

Watertown, CT 06795 USA +1-203-755-1666
10/14/2024
FlowMaster
[10.03.00.03]
Bentley Systems, Inc. Haestad Methods Solution
CenterInlet and Street Capacity.fm8
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices Combination Inlet In Sag - B1
Project Description
SpreadSolve For
Input Data
cfs3.31Discharge
ft2.00Gutter Width
%2.200Gutter Cross Slope
%1.800Road Cross Slope
in0.0Local Depression
in0.0Local Depression Width
ft2.00Grate Width
ft4.0Grate Length
P-50 mm (P-1
-7/8")Grate Type
%50.0Clogging
ft4.0Curb Opening Length
ft0.5Opening Height
HorizontalCurb Throat Type
degrees90.00Throat Incline Angle
Options
Use BothCalculation Option
Results
ft19.5Spread
in4.3Depth
in0.1Gutter Depression
in0.1Total Depression
ft²3.6Open Grate Area
ft6.0Active Grate Weir Length

Page 10 of 1027 ends

Watertown, CT 06795 USA +1-203-755-1666
10/14/2024
FlowMaster
[10.03.00.03]
Bentley Systems, Inc. Haestad Methods Solution
CenterInlet and Street Capacity.fm8
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices 23 Riverside Community Hospital Phase 1 │ Preliminary Hydrology Report January 2025

Appendix K - Supporting Material

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 1 -

Project Specific Water Quality Management Plan
A Template for Projects located within the Santa Ana Watershed Region of Riverside County

Project Title: Riverside Community Hospital Brockton Parking Garage (Phase 1) Development No: GP-2024-10767
Design Review/Case No: PR-2024-001701

Original Date Prepared: 10/10/2024
Revision Date(s): 3/14/2025
Prepared for Compliance with
Regional Board Order No. R8-2010-0033

Contact Information:

Prepared for:

Zach Weidman
HCA / Riverside Community Hospital
4445 Magnolia Avenue
Riverside, CA 92501
951-788-3151

Prepared by:

Nikki Kerry, P.E.

Kimley-Horn and Associates, Inc.
1100 Town and Country Rd Suite 700
Orange, CA 92868
714-939-1030

Preliminary
Final
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 2 -

OWNER’S CERTIFICATION

This Project-Specific Water Quality Management Plan (WQMP) has been prepared for HCA / Riverside Community Hospital by Kimley-Horn and Associates, Inc. for the Riverside Community Hospital Parking Garage.

This WQMP is intended to comply with the requirements of the City of Riverside The Riverside Community Hospital Garage Improvements, Planning Case No. PR-2024-001701 which includes the requirement for the preparation and implementation of a Project-Specific WQMP.

The undersigned, while owning the property/project described in the preceding paragraph, shall be responsible for the implementation and funding of this WQMP and will ensure that this WQMP is amended as appropriate to reflect up-to-date conditions on the site. In addition, the property owner accepts responsibility for interim operation and maintenance of Stormwater BMPs until such time as this responsibility is formally transferred to a subsequent owner. This WQMP will be reviewed with the facility operator, facility supervisors, employees, tenants, maintenance and service contractors, or any other party (or parties) having responsibility for implementing portions of this WQMP. At least one copy of this WQMP will be maintained at the project site or projec t office in perpetuity. The undersigned is authorized to certify and to approve implementation of this WQMP. The undersigned is aware that implementation of this WQMP is enforceable under the City of Riverside Water Quality Ordinance (Municipal Code Section 14.12.315).
"I, the undersigned, certify under penalty of law that the provisions of this WQMP have been reviewed and accepted and that the WQMP will be transferred to future successors in interest."

Owner’s Signature Date

Owner’s Printed Name Owner’s Title/Position

PREPARER’S CERTIFICATION

“The selection, sizing and design of stormwater treatment and other stormwater quality and quantity control measures in this plan meet the requirements of Regional Water Quality Control Board Order No. R8-2010-0033 and any subsequent amendments thereto.”

3/14/2025
Preparer’s Signature Date

Nikki Kerry, P.E. Registered Civil Engineer
Preparer’s Printed Name Preparer’s Title/Position

Preparer’s Licensure:

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 3 -

Table of Contents
Section A: Project and Site Information ................................ ................................ ................................ ... 5 A.1 Maps and Site Plans ................................ ................................ ................................ ....................... 6 A.2 Receiving Waters ................................ ................................ ................................ ........................... 6 A.3 Additional Permits/Approvals required for the Project:................................ ................................ .. 6 Section B: Optimize Site Utilization (LID Principles) ................................ ................................ .................. 7 Section C: Delineate Drainage Management Areas (DMAs) ................................ ................................ ...... 8 Section D: Implement LID BMPs ................................ ................................ ................................ .............. 9 D.1 Infiltration Applicability ................................ ................................ ................................ ................. 9 D.2 Harvest and Use Assessment ................................ ................................ ................................ ....... 10 D.3 Bioretention and Biotreatment Assessment................................ ................................ ................. 11 D.4 Feasibility Assessment Summaries ................................ ................................ ............................... 12 D.5 LID BMP Sizing ................................ ................................ ................................ ............................. 12 Section E: Alternative Compliance (LID Waiver Program) ................................ ................................ ....... 13 Section F: Hydromodification ................................ ................................ ................................ ................ 14 F.1 Hydrologic Conditions of Concern (HCOC) Analysis ................................ ................................ ....... 14 F.2 HCOC Mitigation ................................ ................................ ................................ .......................... 15 Section G: Source Control BMPs ................................ ................................ ................................ ............ 16 Section H: Construction Plan Checklist ................................ ................................ ................................ ... 17 Section I: Operation, Maintenance and Funding ................................ ................................ .................... 18

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 4 -

List of Tables
Table A.1 Identification of Receiving Waters ................................ ................................ ............................ 6 Table A.2 Other Applicable Permits ................................ ................................ ................................ ......... 6 Table C.1 DMA Classifications ................................ ................................ ................................ .................. 8 Table C.2 Type ‘A’, Self-Treating Areas ................................ ................................ ................................ ..... 8 Table C.3 Type ‘B’, Self-Retaining Areas ................................ ................................ ................................ ... 8 Table C.4 Type ‘C’, Areas that Drain to Self-Retaining Areas ................................ ................................ ..... 8 Table C.5 Type ‘D’, Areas Draining to BMPs ................................ ................................ ............................. 9 Table D.1 Infiltration Feasibility ................................ ................................ ................................ ............... 9 Table D.2 LID Prioritization Summary Matrix................................ ................................ .......................... 12 Table D.3 DCV Calculations for LID BMPs ................................ ................................ ............................... 12 Table F.1 Hydrologic Conditions of Concern Summary ................................ ................................ ........... 14 Table G.1 Permanent and Operational Source Control Measures ................................ ........................... 16 Table H.1 Construction Plan Cross-reference ................................ ................................ ......................... 17

List of Appendices
Appendix 1: Maps and Site Plans ................................ ................................ ................................ ........... 19 Appendix 2: Construction Plans ................................ ................................ ................................ ............. 20 Appendix 3: Soils Information ................................ ................................ ................................ ................ 21 Appendix 4: Historical Site Conditions ................................ ................................ ................................ ... 22 Appendix 5: LID Infeasibility................................ ................................ ................................ ................... 22 Appendix 6: BMP Design Details ................................ ................................ ................................ ............ 24 Appendix 7: Hydromodification ................................ ................................ ................................ ............. 25 Appendix 8: Source Control ................................ ................................ ................................ ................... 26 Appendix 9: O&M ................................ ................................ ................................ ................................ .. 27 Appendix 10: Educational Materials................................ ................................ ................................ ..... - 6 -

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 5 -

Section A: Project and Site Information
Riverside Community Hospital in the City of Riverside, California has been providing healthcare services to the community since 1925, when the first building was constructed on its campus located at 4445 Magnolia Avenue. The site is fully developed with buildings, surface parking, and parking structures.

This proposed Project consists of the addition of a multi-level parking garage to the Riverside Community Hospital campus. It is located at the northwest corner of the site, near the intersection of Brockton Avenue and 14th Street. Phase 1 of the project includes solely the addition of the parking garage labeled DMA A1 in the WQMP Exhibit in Appendix A. The southern portion of the site will be developed into a gravel lot with a proposed concrete pad during Phase 1. During Phase 2, south of the parking garage will be a proposed parking lot and drive aisle that will be constructed alongside additional tower improvements in the center of the Campus during a later date. The calculations for water quality were done taking into account the Phase 2 developments as the design capture volume is expected to be higher due to higher impervious values. The drainage areas identified in the WQMP exhibit are covered in this WQMP, all shaded areas outside of the drainage are limits are proposed improvements that will be analyzed in a future WQMP report. The proposed underground infiltration system (PR-BMP-1) will be tributary to DMA A1. Flows from PR-BMP-1 will overflow via orifice and outlet to the existing onsite storm drain system (EX-BMP-A) which ultimately overflows to an existing 24” lateral along Tesquesquite Ave.

PROJECT INFORMATION
Type of Project: Redevelopment, Parking Garage
Ward Area: 1
Community Name: Northside
Development Name: Riverside Community Hospital Brockton Parking Garage

PROJECT LOCATION
Latitude & Longitude (DMS): 33°58’35” N, 117°22’58” W
Project Watershed and Sub-Watershed: Santa Ana, Santa Ana River, Reach 3 APN(s): 217-060-009, 217-060-020, 217-060-028, 217-060-027, 217-060-026, 217-060-024 Map Book and Page No.: Map Grid – 685 F5

PROJECT CHARACTERISTICS
Proposed or Potential Land Use(s) Parking Garage
Proposed or Potential SIC Code(s) NAICS 812930/SIC 7521 Area of Impervious Project Footprint (SF) 142,294 sq ft Total Area of proposed Impervious Surfaces within the Project Limits (SF)/or Replacement 83,069 sq ft Does the project consist of offsite road improvements? Y N Does the project propose to construct unpaved roads? Y N Is the project part of a larger common plan of development (phased project)? Y N

EXISTING SITE CHARACTERISTICS
Total area of existing Impervious Surfaces within the project limits (SF) 117,667 sq ft Is the project located within any MSHCP Criteria Cell? Y N If so, identify the Cell number: N/A
Are there any natural hydrologic features on the project site? Y N Is a Geotechnical Report attached? Y N
If no Geotech. Report, list the NRCS soils type(s) present on the site (A, B, C and/or D) Soil Group B What is the Water Quality Design Storm Depth for the project? 0.55 PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 6 -

A.1 Maps and Site Plans
Appendix 1 includes a map of the local vicinity and existing site. In addition, located in Appendix 1, the WQMP Site Plan includes the following:
• Drainage Management Areas
• Proposed Structural BMPs
• Drainage Path
• Drainage Infrastructure, Inlets, Overflows
• Source Control BMPs
• Buildings, Roof Lines, Downspouts
• Impervious Surfaces
• Standard Labeling
A.2 Receiving Waters
In order of upstream to downstream, the receiving waters that the project site is tributary to are as follows below. A map of the receiving waters is included in Appendix 1.

Table A.1 Identification of Receiving Waters
Receiving Waters EPA Approved 303(d) List
Impairments
Designated
Beneficial Uses
Proximity to
RARE
Beneficial Use
Santa Ana River, Reach 3 Pathogens, Copper, Lead AGR, GWR, REC1, REC2, WARM, WILD, RARE 1 Mile
Santa Ana River, Reach 2 Enterococcus, Total Coliform , (E. coli) , Fecal Coliform
Water Contact Recreation , Warm
Freshwater Habitat N/A
Santa Ana River, Reach 1 pH, Fecal Coliform Water Contact Recreation , Estuarine Habitat N/A
Prado Basin Management
Zone pH RARE, REC1, REC2, WARM, WILD 12 Miles
A.3 Additional Permits/Approvals required for the Project:

Table A.2 Other Applicable Permits
Agency Permit Required
State Department of Fish and Game, 1602 Streambed Alteration Agreement Y N State Water Resources Control Board, Clean Water Act (CWA) Section 401 Water Quality Cert. Y N US Army Corps of Engineers, CWA Section 404 Permit Y N US Fish and Wildlife, Endangered Species Act Section 7 Biological Opinion Y N Statewide Construction General Permit Coverage Y N
Statewide Industrial General Permit Coverage Y N
Western Riverside MSHCP Consistency Approval (e.g., JPR, DBESP) Y N City of Riverside Conditional Use Permit Y N
City of Riverside Design Review Y N
City of Riverside Building Permit Y N
City of Riverside Grading Permit Y N
City of Riverside Construction Permit Y N

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 7 -

Section B: Optimize Site Utilization (LID Principles)
Site Optimization

Does the project identify and preserve existing drainage patterns? If so, how? If not, why? Yes, existing drainage patterns are expected to be maintained in general . Stormwater runoff generated from the site utilizes one of five outfall locations, as identified and labeled on the Campus Drainage Plans in the appendix.

The new Brockton parking garage (DMA A1) will connect to the exiting onsite storm drain labeled Outfall #2. From there flows will continue through the existing onsite storm drain until reaching outfall #1. A 24- inch storm drain lateral in the southwest quadrant of the Brockton and Tequesquite intersection serves as Outfall #1. This lateral connects to an existing 12’x7’ RCB storm drain in Tequesquite. Runoff from the western portion of the site including all parking structures is piped to this location via the on -site storm drainage system. The drive-in area to the proposed parking garage along Brockton Ave consists of 0.02 acres, noted as DMA B. This area makes up 1% of the total site and can be considered de-minimis area as it consists of less than 5% of the total site. DMA B matches existing conditions drainage patterns via sheet flow to Brockton Ave. Drainage has been captured on-site to the maximum extent possible (MEP).

Does the project identify and protect existing vegetation? If so, how? If not, why?

The subject site is currently highly developed and consists of mostly impervious surfaces such as roofs, pavement, and sidewalks with only limited amounts of pervious landscaped areas within planting beds or along the site perimeter. Due to the reconfiguration of the site to accommodate the proposed redevelopment, most of the existing landscaped areas within the limits of disturbance cannot be protected.

However, new landscaped areas will be provided with proposed construction.

Does the project identify and preserve natural infiltration capacity? If so, how? If not, why? There are minimal areas on -site with natural infiltration capacity. To the extent practicable, these few areas will be preserved. Otherwise, new landscaped areas will provide some natural infiltration capacity.

Does the project identify and minimize impervious area? If so, how? If not, why? Yes, the proposed parking garage has a high floor area ratio, which reduces the amount of impervious area by providing for more square footage within the same impervious footprint.

Does the project identify and disperse runoff to adjacent pervious areas? If so, how? If not, why? Yes, where feasible, stormwater runoff will drain away from structures into adjacent pervious landscaped areas.

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 8 -

Section C: Delineate Drainage Management Areas
(DMAs)
Table C.1 DMA Classifications
DMA Name or ID Surface Type(s)1 Area (Sq. Ft.) DMA Type A1 Concrete or Asphalt 61,184 Type ‘ D’ – Area that
drains to BMP
A1 Ornamental Landscaping 22,080 Type ‘D’ – Area that
drains to BMP
1Reference Table 2-1 in the WQMP Guidance Document to populate this column Table C.2 Type ‘A’, Self-Treating Areas
DMA Name or ID Area (Sq. Ft.) Stabilization Type Irrigation Type (if any) N/A

Table C.3 Type ‘B’, Self-Retaining Areas
Self-Retaining Area
Type ‘C’ DMAs that are draining to the Self -Retaining
Area
DMA
Name/ ID
Post-project
surface type
Area
(square
feet)
Storm
Depth
(inches) DMA Name /
ID
[C] from Table C.4 =
Required Retention Depth
(inches)
[A] [B] [C] [D]
N/A

[𝐷] = [𝐵] +
[𝐵] ∙ [𝐶]
[𝐴]
Table C.4 Type ‘C’, Areas that Drain to Self-Retaining Areas DMA Receiving Self-Retaining DMA
DMA Name/ ID
Area
(square feet)
Post-project
surface type
Runoff
factor
Product
DMA name /ID
Area (square
feet) Ratio
[A] [B] [C] = [A] x [B] [D] [C]/[D]
N/A

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 9 -

Table C.5 Type ‘D’, Areas Draining to BMPs
DMA Name or ID BMP Name or ID
DMA A1 PR-BMP-1
Note: More than one drainage management ar ea can drain to a single LID BMP, however, one drainage management area may not drain to more than one BMP.

Section D: Implement LID BMPs
D.1 Infiltration Applicability
Is there an approved downstream ‘Highest and Best Use’ for stormwater runoff ( Chapter 2.4.4 of the WQMP Guidance Document)? Y N

Geotechnical Report
A Geotechnical Report is required by the City of Riverside to confirm present and past site characteristics that may affect the use of Infiltration BMPs, see Appendix 3.

Is this project classified as a small project consistent with the requirements of Chapter 2 of the WQMP Guidance Document? Y N (Greater than 5 acres/50,000 sf impervious area) Infiltration Feasibility
Table D.1 Infiltration Feasibility
Does the project site… YES NO
…have any DMAs with a seasonal high groundwater mark shallower than 10 feet? X If Yes, list affected DMAs:
…have any DMAs located within 100 feet of a water supply well? X If Yes, list affected DMAs:
…have any areas identified by the geotechnical report as posing a public safety risk where infiltration of stormwater could have a negative impact?
X
If Yes, list affected DMAs:
…have measured in-situ infiltration rates of less than 1.6 inches / hour? X If Yes, list affected DMAs:
…have significant cut and/or fill conditions that would preclude in -situ testing of infiltration rates at the final infiltration surface?
X
If Yes, list affected DMAs:
…geotechnical report identify other site-specific factors that would preclude effective and safe infiltration? X Describe here:

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 10 -

D.2 Harvest and Use Assessment
The following conditions apply:
 Reclaimed water will be used for the non-potable water demands for the project.  Downstream water rights may be impacted by Harvest and Use as approved by the Regional Board (verify with the City of Riverside).

X The Design Capture Volume will be addressed using Infiltration Only BMPs . (Harvest and Use BMPs are still encouraged, but are not required as the Design Capture Volume will be infiltrated or evapotranspired).

Irrigation Use Feasibility
Step 1: Total Area of Irrigated Landscape (Acres): N/A
Type of Landscaping (Conservation Design or Active Turf): N/A Step 2: Total Area of Impervious Surfaces (Acres): N/A
Step 3: The Project EIATIA factor: N/A
Step 4: Minimum required irrigated area (Acres): NA
Step 5:

Minimum required irrigated area (acres)
(Step 4)
Available Irrigated Landscape (acres)
(Step 1)

N/A N/A

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 11 -

Toilet Use Feasibility
Step 1: Projected Number of Daily Toilet Users: N/A
Project Type: N/A
Step 2: Total Area of Impervious Surfaces: N/A
Step 3: The Project TUTIA factor: N/A
Step 4: Minimum number of toilet users: N/A
Step 5:

Minimum required Toilet Users (Step 4) Projected number of toilet users (Step 1) N/A NA

Other Non-Potable Use Feasibility
Step 1: Average Daily Demand: N/A
Step 2: Total Area of Impervious Surfaces: N/A
Step 3: The project factor: N/A
Step 4: Minimum required use: N/A
Step 5:

Minimum required non-potable use (Step 4) Projected average daily use (Step 1)

N/A N/A

D.3 Bioretention and Biotreatment Assessment
Other LID Bioretention and Biotreatment BMPs as described in Chapter 2.4.7 of the WQMP Guidance Document are feasible on nearly all development sites with sufficient advance planning.

For the project, the following applies:
[ ] LID Bioretention/Biotreatment BMPs will be used for some or all DMAs of the project as noted below in Section D.4

[ ] A site-specific analysis demonstrating the technical infeasibility of all LID BMPs has been performed and is included in Appendix 5.
☒ None of the above.

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 12 -

D.4 Feasibility Assessment Summaries

Table D.2 LID Prioritization Summary Matrix
DMA
Name/ID
LID BMP Hierarchy No LID
(Alternative
Compliance) 1. Infiltration 2. Harvest and use 3. Bioretention 4. Biotreatment A1

D.5 LID BMP Sizing

Table D.3 DCV Calculations for LID BMPs
DMA
Type/ID
DMA
Area
(square
feet)
Post-Project
Surface
Type
Effective
Impervious
Fraction, If
DMA
Runoff
Factor
DMA
Areas x
Runoff
Factor
Underground Infiltration System PR-
BMP-1
[A] [B] [C] [A] x [C]
A1 61,184 Concrete or
Asphalt

1.0 0.89 54,576.1
Design
Storm
Depth
(in)
Design
Capture
Volume, VBMP
(cubic feet)
Proposed
Volume on
Plans (cubic
feet)
A1 22,080 Ornamental
Landscaping

0.1 .11 2,438.9

AT =
Σ[A] =
83,264
57,015 0.55 2613.2
2745.2
(Volume to
be retained
below
outlet)

[B], [C] is obtained as described in Section 2.3.1 of the WQMP Guidance Document [E] is obtained from Exhibit A in the WQMP Guidance Document [G] is obtained from a design procedure sheet, such as in LID BMP Design Handbook and placed in Appendix 6

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 13 -

Section E: Alternative Compliance (LID Waiver Program)
LID BMPs are expected to be feasible on virtually all projects. Where LID BMPs have been demonstrated to be infeasible as documented in Section D, other Treatment Control BMPs must be used (subject to LID waiver approval by the Regional Board). For the project, the following applies:

X LID Principles and LID BMPs have been incorporated into the site design to fully address all Drainage Management Areas. No alternative compliance measure s are required for this project and thus this Section is not required to be completed.
- Or -
 The following Drainage Management Areas are unable to be addressed using LID BMPs. A site- specific analysis demonstrating technical infeasibility of LID BMPs has been approved by the Regional Board and included in Appendix 5. Additionally, no downstream regional and/or sub - regional LID BMPs exist or are available for use by the project . The following alternative compliance measures on the following pages are being implemented to ensure that any pollutant loads expected to be discharged by not incorporating LID BMPs, are fully mitigated.

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 14 -

Section F: Hydromodification
F.1 Hydrologic Conditions of Concern (HCOC) Analysis
This project does not create a Hydrologic Condition of Concern, meeting the criteria for HCOC Exemption as shown below:

HCOC EXEMPTION 1: The Priority Development Project dist urbs less than one acre. The City of Riverside has the discretion to require a Project-Specific WQMP to address HCOCs on projects less than one acre on a case by case basis. The disturbed area calculation should include all disturbances associated with larger common plans of development.

Does the project qualify for this HCOC Exemption? Y N

HCOC EXEMPTION 2: The volume and time of concentration1 of storm water runoff for the post - development condition is not significantly different from the pre-development condition for a 2-year return frequency storm (a difference of 5% or less is considered insignificant ) using one of the following methods to calculate:
• Riverside County Hydrology Manual
• Technical Release 55 (TR -55): Urban Hydrology for Small Watersheds (NRCS 1986), or derivatives thereof, such as the Santa Barbara Urban Hydrograph Method • Other methods acceptable to the City of Riverside
Does the project qualify for this HCOC Exemption? Y N Results included in Table F.1 below and hydrologic analysis is included in Appendix 7.

Table F.1 Hydrologic Conditions of Concern Summary
2 year – 24 hour
Pre-condition Post-condition % Difference
Time of
Concentration

Volume (Cubic Feet)
1 Time of concentration is defined as the time after the beginning of the rainfall when all portions of the drainage basin are contributing to flow at the outlet.

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 15 -

HCOC EXEMPTION 3: All downstream conveyance channels to an adequate sump (for example, Prado Dam, Santa Ana River, etc.) that will receive runoff from the project are engineered and regularly maintained to ensure design flow capacity; no sensitive stream habitat areas will be adversely affected; or are not identified on the Co -Permittees Hydromodification Sensitivity Maps.

Does the project qualify for this HCOC Exemption? Y N If yes, HCOC criteria do not apply and note below which adequate sump applies to this HCOC qualifier:

HCOC Exemption 3 is satisfied because all outfalls discharge into an engineered, fully -hardened, and maintained conveyance system to the Santa Ana River as identified on the map in the appendix.

F.2 HCOC Mitigation
As an alternative to the HCOC Exemption Criteria above, HCOC criteria is considered mitigated if the project meets one of the following conditions, as indicated:
[ ] a. Additional LID BMPS are implemented onsite or offsite to mitigate potential erosion or habitat impacts as a result of HCOCs. This can be conducted by an evaluation of site-specific conditions utilizing accepted professional methodologies published by entities such as the California Stormwater Quality Association (CASQA), the Southern California Coastal Water Research Project (SCCRWP), or other City of Riverside approved methodologies for site-specific HCOC analysis .

[ ] b. The project is developed consistent with an approved Watershed Action Plan that addresses HCOC in Receiving Waters.

[ ] c. Mimicking the pre-development hydrograph with the post-development hydrograph, for a 2-year return frequency storm. Generally, the hydrologic conditions of concern are not significant, if the post-development hydrograph is no more than 10% greater than pre -development hydrograph . In cases where excess volume cannot be infiltrated or captured and reused, discharge from the site must be limited to a flow rate no greater than 110% of the pre-development 2-year peak flow. [ X ] d. None of the above.

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 16 -

Section G: Source Control BMPs
The following table identifies the potential sources of runoff pollutants for this project and specifies how they are addressed through permanent controls and operational BMPs:

Table G.1 Permanent and Operational Source Control Measures Potential Sources of
Runoff pollutants
Permanent Structural Source
Control BMPs
Operational Source Control BMPs
Bacterial Indicators TC-11 Infiltration Basin SC-10 Non-Stormwater Discharges, SC-40 Contaminated or Erodible Areas, SC-41 Building
and Grounds Maintenance, SC-44 Drainage
System Maintenance
Metals TC-11 Infiltration Basin SC-10 Non-Stormwater Discharges, SC-11 Spill Prevention, Control and Cleanup, SC-40
Contaminated or Erodible Areas, SC-41 Building
and Grounds Maintenance, SC-42 Building
Repair and Construction, SC-43 Parking/Storage
Area Maintenance
Nutrients TC-11 Infiltration Basin SC-10 Non-Stormwater Discharges, SC-40 Contaminated or Erodible Areas, SC-41 Building
and Grounds Maintenance,
Toxic Organic Compounds TC-11 Infiltration Basin SC-10 Non-Stormwater Discharges, SC-11 Spill Prevention, Control and Cleanup, SC-40
Contaminated or Erodible Areas, SC-42 Building
Repair and Construction, SC-43 Parking/Storage
Area Maintenance
Sediments TC-11 Infiltration Basin SC-40 Contaminated or Erodible Areas, SC-41 Building and Grounds Maintenance, SC-42
Building Repair and Construction, SC-43
Parking/Storage Area Maintenance, SC-44
Drainage System Maintenance
Trash and Debris TC-11 Infiltration Basin SC-42 Building Repair and Construction, SC-43 Parking/Storage Area Maintenance, SC-44
Drainage System Maintenance
Oil and Grease TC-11 Infiltration Basin SC-10 Non-Stormwater Discharges, SC-11 Spill Prevention, Control and Cleanup, SC-40
Contaminated or Erodible Areas, SC-42 Building
Repair and Construction, SC-43 Parking/Storage
Area Maintenance

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 17 -

Section H: Construction Plan Checklist
Table H.1 Construction Plan Cross-reference
BMP No.
or ID BMP Identifier and Description
Corresponding
Plan Sheet(s)
Latitude / Longitude
PR-BMP-1 Underground Infiltration
Chamber
WQMP Exhibit 33° 58’37.89”N 117° 23’02.24”W

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 18 -

Section I: Operation, Maintenance and Funding
As required by the City of Riverside, the following operation, maintenance, and funding details are provided, as summarized:

1. A means to finance and implement facility maintenance in perpetuity , including replacement cost.

2. Acceptance of responsibility for maintenance from the time the BMPs are constructed until responsibility for operation and maintenance is legally transferred.

3. An outline of general maintenance requirements for the Stormwater BMPs selected.

4. Figures delineating and designating pervious and impervious areas, location, and type of Stormwater BMP, and tables of pervious and impervious areas served by each facility.

5. A separate list and location of self-retaining areas or areas addressed by LID Principles that do not require specialized O&M or inspections but will require typical landscape maintenance as noted in Chapter 5, pages 85-86, in the WQMP Guidance.

See Appendix 9 for a detailed Stormwater BMP Operation and Maintenance Plan that sets forth a maintenance schedule for each of the Stormwater BMPs built on -site, and a n agreement assigning responsibility for maintenance and providing for inspections and certification.

Maintenance Mechanism: Riverside Community Hospital Facilities Management shall be responsible for maintenance.

Will the proposed BMPs be maintained by a Home Owners’ Association (HOA) or Property Owners Association (POA)?
Y N

Operation and Maintenance Plan and Maintenance Mechanism is included in Appendix 9. Educational materials for those personnel that will be maintaining the proposed BMPs within this Project-Specific WQMP are in Appendix 10.

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices - 19 -

Appendix 1: Maps and Site Plans
Location Map, WQMP Site Plan, and Receiving Waters Map

PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

RIVERSIDE COUNTY FLOOD

CONTROL AND WATER

CONSERVATION DISTRICT
Isohyetal Map
for the 85th Percentile
24 hour Storm Event
July 2011
Rain Gage Locations

PROJECT SITE
PR-2024-001701 (GPA, SPA, RZ, DR) Exhibit 13 - EIR Addendum and appedices

Riverside City CouncilMay 20, 2025

Riverside City Council
May 20, 2025