PRELIMINARY DRAINAGE REPORT

For

3rd at Central Industrial

APN: 1192-561-11, -15, -16, -17, -18, -19, -20, -21

PROJECT LOCATION

Northwest Corner of 3rd Street & Central Avenue

Highland, California

PREPARED FOR

Patriot Development Partners

12126 W. Sunset Blvd.

Los Angeles, CA 90049

(858) 952-4134

PREPARED BY

Huitt-Zollars, Inc.

3990 Concours, Suite 330

Ontario, Ca 91764

Ph: (909) 941-7799

Fax: (909) 941-7789

PREPARATION DATE

02/24/2022

HZ PROJECT NUMBER

R314509.01

Ryan Peng, P.E.

C77887, Exp 06/30/2023

23

Table of Contents

Title Page

Introduction 1

Purpose 1

Existing Condition 1

Proposed Condition 1

Hydrologic Analysis 1

Discussion 1

List of Appendices

Appendix A Preliminary Drainage Maps

- 100-year Storm Event – Existing Condition

- 100-year Storm Event – Proposed Condition

Appendix B 100-year Rational Method

- Existing Condition

- Proposed Condition

Appendix C 100-year Existing & Proposed Unit Hydrograph

Infiltration/Detention System Basin Routing

Appendix D Stormwater Facility Mapping Hydrologic Soils Type

Isohyetal Maps

Appendix E Selected References

1

Introduction

The project is a new development of an industrial facility located at the northwest corner of 3rd Street and

Central Avenue in Highland, California. Proposed building is approximately 54,460 square feet on

approximately 3.02 acres. Currently the west portion of the site is for used car-parking yard and east portion

of the site is vacant.

Purpose

The purpose of this preliminary report is to present the drainage concept for the project and to determine

the design flow rates and estimate storm drain sizes that will be needed for the proposed development. The

drainage maps (Appendix A) and calculations reflect the tributary areas and 100-year storm event runoff

flows (Q100).

Existing Condition

The west portion of the site is for used car-parking yard and the east portion is vacant with scattered grass.

The site slopes down by approximately 1% from the northeast corner to the southwest corner toward to 3rd

Street that has about seven (7) feet of fall. Existing runoff sheet flows onto the 3rd Street and discharge to

3rd Street Storm Drain system, City Creek Channel, Santa Ana River, and finally enter to Prado Basin. See

Appendix A for existing drainage map and Appendix E for existing drainage facilities.

Proposed Condition

The proposed post-development drainage pattern preserves the existing drainage pattern. See Appendix A

for the proposed on-site hydrology map. For the proposed development, all onsite runoff will be directed

to the onsite underground infiltration/detention system on the west side of the site. The underground

infiltration system is designed to mitigate peak 100-year stormwater flow increase resulting from the

development. The overflow from the infiltration system will be directed through a proposed 8” drain pipe

that connect to the existing curb inlet in 3rd Street and discharge to the 3rd Street Storm Drain System.

Hydrologic Analysis

A hydrologic analysis was prepared using the methodology outlined in the San Bernardino County Flood

Control District (SBCFCD) Hydrology Manual. A rational method analysis was completed for existing and

proposed 100-year storm event using Civild software, version 7.1. Unit Hydrograph and Basin Routing

analyses were also completed using Civild software.

The 100-year 1-hour storm depth was taken from the isohyetal maps in the County of San Bernardino

Hydrology Manual. The site’s hydrologic soils type is "A" and was taken from San Bernardino County’s

Stormwater Facility Mapping Tool. For the proposed development’s hydrologic analysis, a commercial

land use was used with an AMC of 3. See Appendix D for hydrologic soils type and isohyetal maps.

Discussion

According to the hydrologic and basin routing analysis for existing and proposed conditions, the results

indicate the proposed Q100 will be mitigated and detained on-site in the underground system and the

resulting discharge to the 3rd Street Storm Drain System will be less than the existing Q100 (5.1 CFS < 6.0

CFS).

See Appendix B for hydrologic analysis and Appendix C for basin routing summary, unit hydrograph, and

basin routing analyses. All proposed drainage and storm drain facilities will be sized adequately for Q100

and calculations will be provided in the final drainage report.

Appendix A

Preliminary Drainage Maps 100 Year Storm Event – Existing Condition

100 Year Storm Event – Proposed Condition

1

PRELIMINARY HYDROLOGY STUDY

1

3RD AT CENTRAL INDUSTRIAL

CITY OF HIGHLAND

EXISTING CONDITION

(1154.55 INV)

(1156.05 INV)

(1157.00 INV)

1157.00 TOP

1156.50 SOFFIT

1150.50 INVERT

1150.00 BOTTOM

1

PRELIMINARY HYDROLOGY STUDY

1

3RD AT CENTRAL INDUSTRIAL

CITY OF HIGHLAND

EXISTING CONDITION

Appendix B

100-year Rational Method Hydrologic Analysis Existing Condition

Proposed Condition

San Bernardino County Rational Hydrology Program

(Hydrology Manual Date - August 1986)

CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2005 Version 7.1

Rational Hydrology Study Date: 12/03/21

------------------------------------------------------------------------

PATRIOT - 3RD AT CENTRAL INDUSTRIAL

100 YR STORM EVENT - EXISTING CONDITION

4509Q100EX

SD

------------------------------------------------------------------------

Program License Serial Number 6145

------------------------------------------------------------------------

********* Hydrology Study Control Information **********

------------------------------------------------------------------------

Rational hydrology study storm event year is 100.0

Computed rainfall intensity:

Storm year = 100.00 1 hour rainfall = 1.280 (In.)

Slope used for rainfall intensity curve b = 0.6000

Soil antecedent moisture condition (AMC) = 3

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 1.000 to Point/Station 2.000

**** INITIAL AREA EVALUATION ****

______________________________________________________________________

RESIDENTIAL(2.5 acre lot)

Decimal fraction soil group A = 1.000

Decimal fraction soil group B = 0.000

Decimal fraction soil group C = 0.000

Decimal fraction soil group D = 0.000

SCS curve number for soil(AMC 2) = 32.00

Adjusted SCS curve number for AMC 3 = 52.00

Pervious ratio(Ap) = 0.9000 Max loss rate(Fm)= 0.707(In/Hr)

Initial subarea data:

Initial area flow distance = 612.000(Ft.)

Top (of initial area) elevation = 1167.600(Ft.)

Bottom (of initial area) elevation = 1160.300(Ft.)

Difference in elevation = 7.300(Ft.)

Slope = 0.01193 s(%)= 1.19

TC = k(0.487)*[(length^3)/(elevation change)]^0.2

Initial area time of concentration = 15.379 min.

Rainfall intensity = 2.897(In/Hr) for a 100.0 year storm

Effective runoff coefficient used for area (Q=KCIA) is C = 0.680

Subarea runoff = 5.953(CFS)

Total initial stream area = 3.020(Ac.)

Pervious area fraction = 0.900

Initial area Fm value = 0.707(In/Hr)

End of computations, Total Study Area = 3.02 (Ac.)

The following figures may

be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area

effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 0.900

Area averaged SCS curve number = 32.0

San Bernardino County Rational Hydrology Program

(Hydrology Manual Date - August 1986)

CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2005 Version 7.1

Rational Hydrology Study Date: 12/09/21

------------------------------------------------------------------------

PATRIOT - 3RD AT CENTRAL INDUSTRIAL

100 YR STORM EVENT - PROPOSED CONDITION

4509Q100P

SD

------------------------------------------------------------------------

Program License Serial Number 6145

------------------------------------------------------------------------

********* Hydrology Study Control Information **********

------------------------------------------------------------------------

Rational hydrology study storm event year is 100.0

Computed rainfall intensity:

Storm year = 100.00 1 hour rainfall = 1.280 (In.)

Slope used for rainfall intensity curve b = 0.6000

Soil antecedent moisture condition (AMC) = 3

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 1.000 to Point/Station 2.000

**** INITIAL AREA EVALUATION ****

______________________________________________________________________

COMMERCIAL subarea type

Decimal fraction soil group A = 1.000

Decimal fraction soil group B = 0.000

Decimal fraction soil group C = 0.000

Decimal fraction soil group D = 0.000

SCS curve number for soil(AMC 2) = 32.00

Adjusted SCS curve number for AMC 3 = 52.00

Pervious ratio(Ap) = 0.1000 Max loss rate(Fm)= 0.079(In/Hr)

Initial subarea data:

Initial area flow distance = 270.000(Ft.)

Top (of initial area) elevation = 1166.600(Ft.)

Bottom (of initial area) elevation = 1162.470(Ft.)

Difference in elevation = 4.010(Ft.)

Slope = 0.01485 s(%)= 1.49

TC = k(0.304)*[(length^3)/(elevation change)]^0.2

Initial area time of concentration = 6.623 min.

Rainfall intensity = 4.802(In/Hr) for a 100.0 year storm

Effective runoff coefficient used for area (Q=KCIA) is C = 0.885

Subarea runoff = 3.444(CFS)

Total initial stream area = 0.810(Ac.)

Pervious area fraction = 0.100

Initial area Fm value = 0.079(In/Hr)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 2.000 to Point/Station 3.000

**** PIPEFLOW TRAVEL TIME (Program estimated size) ****

______________________________________________________________________

Upstream point/station elevation = 1157.000(Ft.)

Downstream point/station elevation = 1154.930(Ft.)

Pipe length = 292.00(Ft.) Manning's N = 0.012

No. of pipes = 1 Required pipe flow = 3.444(CFS)

Nearest computed pipe diameter = 12.00(In.)

Calculated individual pipe flow = 3.444(CFS)

Normal flow depth in pipe = 8.66(In.)

Flow top width inside pipe = 10.76(In.)

Critical Depth = 9.52(In.)

Pipe flow velocity = 5.68(Ft/s)

Travel time through pipe = 0.86 min.

Time of concentration (TC) = 7.48 min.

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 3.000 to Point/Station 3.000

**** SUBAREA FLOW ADDITION ****

______________________________________________________________________

COMMERCIAL subarea type

Decimal fraction soil group A = 1.000

Decimal fraction soil group B = 0.000

Decimal fraction soil group C = 0.000

Decimal fraction soil group D = 0.000

SCS curve number for soil(AMC 2) = 32.00

Adjusted SCS curve number for AMC 3 = 52.00

Pervious ratio(Ap) = 0.1000 Max loss rate(Fm)= 0.079(In/Hr)

Time of concentration = 7.48 min.

Rainfall intensity = 4.464(In/Hr) for a 100.0 year storm

Effective runoff coefficient used for area,(total area with modified

rational method)(Q=KCIA) is C = 0.884

Subarea runoff = 0.227(CFS) for 0.120(Ac.)

Total runoff = 3.671(CFS)

Effective area this stream = 0.93(Ac.)

Total Study Area (Main Stream No. 1) = 0.93(Ac.)

Area averaged Fm value = 0.079(In/Hr)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 3.000 to Point/Station 4.000

**** PIPEFLOW TRAVEL TIME (Program estimated size) ****

______________________________________________________________________

Upstream point/station elevation = 1154.930(Ft.)

Downstream point/station elevation = 1153.680(Ft.)

Pipe length = 141.00(Ft.) Manning's N = 0.012

No. of pipes = 1 Required pipe flow = 3.671(CFS)

Nearest computed pipe diameter = 15.00(In.)

Calculated individual pipe flow = 3.671(CFS)

Normal flow depth in pipe = 8.00(In.)

Flow top width inside pipe = 14.97(In.)

Critical Depth = 9.29(In.)

Pipe flow velocity = 5.51(Ft/s)

Travel time through pipe = 0.43 min.

Time of concentration (TC) = 7.91 min.

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 4.000 to Point/Station 4.000

**** SUBAREA FLOW ADDITION ****

______________________________________________________________________

COMMERCIAL subarea type

Decimal fraction soil group A = 1.000

Decimal fraction soil group B = 0.000

Decimal fraction soil group C = 0.000

Decimal fraction soil group D = 0.000

SCS curve number for soil(AMC 2) = 32.00

Adjusted SCS curve number for AMC 3 = 52.00

Pervious ratio(Ap) = 0.1000 Max loss rate(Fm)= 0.079(In/Hr)

Time of concentration = 7.91 min.

Rainfall intensity = 4.318(In/Hr) for a 100.0 year storm

Effective runoff coefficient used for area,(total area with modified

rational method)(Q=KCIA) is C = 0.884

Subarea runoff = 3.312(CFS) for 0.900(Ac.)

Total runoff = 6.983(CFS)

Effective area this stream = 1.83(Ac.)

Total Study Area (Main Stream No. 1) = 1.83(Ac.)

Area averaged Fm value = 0.079(In/Hr)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 4.100 to Point/Station 4.000

**** SUBAREA FLOW ADDITION ****

______________________________________________________________________

COMMERCIAL subarea type

Decimal fraction soil group A = 1.000

Decimal fraction soil group B = 0.000

Decimal fraction soil group C = 0.000

Decimal fraction soil group D = 0.000

SCS curve number for soil(AMC 2) = 32.00

Adjusted SCS curve number for AMC 3 = 52.00

Pervious ratio(Ap) = 0.1000 Max loss rate(Fm)= 0.079(In/Hr)

Time of concentration = 7.91 min.

Rainfall intensity = 4.318(In/Hr) for a 100.0 year storm

Effective runoff coefficient used for area,(total area with modified

rational method)(Q=KCIA) is C = 0.884

Subarea runoff = 4.541(CFS) for 1.190(Ac.)

Total runoff = 11.524(CFS)

Effective area this stream = 3.02(Ac.)

Total Study Area (Main Stream No. 1) = 3.02(Ac.)

Area averaged Fm value = 0.079(In/Hr)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Process from Point/Station 4.000 to Point/Station 5.000

**** PIPEFLOW TRAVEL TIME (Program estimated size) ****

______________________________________________________________________

Upstream point/station elevation = 1153.680(Ft.)

Downstream point/station elevation = 1153.500(Ft.)

Pipe length = 15.00(Ft.) Manning's N = 0.012

No. of pipes = 1 Required pipe flow = 11.524(CFS)

Nearest computed pipe diameter = 18.00(In.)

Calculated individual pipe flow = 11.524(CFS)

Normal flow depth in pipe = 13.66(In.)

Flow top width inside pipe = 15.39(In.)

Critical Depth = 15.52(In.)

Pipe flow velocity = 8.01(Ft/s)

Travel time through pipe = 0.03 min.

Time of concentration (TC) = 7.94 min.

End of computations, Total Study Area = 3.02 (Ac.)

The following figures may

be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area

effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 0.100

Area averaged SCS curve number = 32.0

Appendix C

100-year Existing & Proposed Unit Hydrograph Studies

Infiltration/ Detention System Basin Routing Studies

3rd at Central Industrial

Detention/ Infiltration System Routing Study SummaryStage Storage Table

# Depth Elevation Area (sf)Incremental

volume (cf)

Total Volume

(cf)

Total Volume

(acre-ft)Outflow Q Notes

1 0.0 1,150.00 2,106 0 0 0Bottom of 72" CMP Infiltration/ Detention

System

2 0.5 1,150.50 2,106 490 490 0.011 0.56 Invert of 72" CMP

3 1.5 1,151.50 2,106 1,519 2,009 0.046 0.56

4 2.5 1,152.50 2,106 1,877 3,886 0.089 0.56

5 3.5 1,153.50 2,106 2,004 5,890 0.135 0.56

6 4.5 1,154.50 2,106 2,004 7,894 0.181 0.56

7 5.5 1,155.50 2,106 1,877 9,771 0.224 0.56 *Meets WQMP DCV

8 6.5 1,156.50 2,106 1,519 11,290 0.259 0.56 Soffit of 72" CMP / *Meets WQMP DCV

9 7.0 1,157.00 2,106 490 11,780 0.270 0.56Top of Infiltration/ Detention System

Release overflow @ 8" drain pipe

10 7.5 1,157.50 2,106 0 11,780 0.270 3.34

11 8.0 1,158.00 2,106 0 11,780 0.270 6.12

Infiltration rate per geotechnical report = 50.4"/hr, Factor of Safety =5.

Unit convert = (50.4"/hr)/5 x (1'/12") X (1hr/60min) X (1 min/60 sec) = 0.00023 ft/sec Q OutFlow = 12' Drain Pipe+ Basin Infiltration Q

Underground Basin open area is 35' x 70' = 2,450 sf = (CA x (2gh)^(1/2)) + Basin Infiltration Q

Therefore, Q out for basin = 2,450 X 0.00023 = 0.56 cfs = (0.6A x (64.4xh)^(1/2)) + Basin Infiltration Q

A = 8" drain pipe area

*WQMP Design Capture Volume is 9,936 CF h = Water Height Above half of pipe (4")

Example: WSE @ 1158

Basin Routing Summary Table ={0.6 x (3.14 x .67)^2 )x [64.4 x (1158-1157.33)]^(1/2)} + 0.56

= 6.12 cfs

5.7 5.1 CFS to public street, 0.6 CFS into the ground

1157.92 Underground System Top: 1157.00

Allowable discharge 6.0 CFS (from Existing Unit Hydrograph).

100 YEAR STORM

Max. Q Out (CFS)

WSE

72" CMP system with 6" rock top & bottom.

Date: 2/3/2022

Project Name: 72 CMP System - 11992 (2-3-2022 21-12-37)

City / County: San Bernardino

State: CA

Designed By: Ryan Peng

Company: Huitt-Zollars, Inc

=Adjustable Input Cells Telephone: 909-941-7799

Out-to-out length (ft): 68.0 Backfill Porosity (%): 40% System Diameter (in): 72

Out-to-out width (ft): 33.0 Depth Above Pipe (in): 6.0 Pipe Spacing (in): 36

Number of Manifolds (ea): 2.0 Depth Below Pipe (in): 6.0 Incremental Analysis (in): 6

Number of Barrels (ea): 4.0 Width At Ends (ft): 1.0 System Invert (Elevation): 1150

Width At Sides (ft): 1.0

Depth (ft) Elevation (ft)Incremental

Storage (cf)

Cumulative

Storage (cf)

Incremental

Storage (cf)

Cumulative

Storage (cf)

Incremental

Storage (cf)

Cumulative

Storage (cf)

Percent Open

Storage (%)

Ave. Surface

Area (sf)

0.00 1150.00 0.0 0.0 0.0 0.0 0.0 0.0 0.0% 980.0

0.50 1150.50 0.0 0.0 490.0 490.0 490.0 490.0 0.0% 980.0

1.00 1151.00 326.4 326.4 359.5 849.5 685.8 1,175.8 27.8% 1,557.1

1.50 1151.50 571.9 898.3 261.2 1,110.7 833.1 2,009.0 44.7% 1,758.2

2.00 1152.00 704.8 1,603.0 208.1 1,318.8 912.9 2,921.8 54.9% 1,884.1

2.50 1152.50 789.5 2,392.6 174.2 1,493.0 963.7 3,885.5 61.6% 1,964.3

3.00 1153.00 841.3 3,233.8 153.5 1,646.5 994.8 4,880.3 66.3% 2,009.4

3.50 1153.50 866.0 4,099.8 143.6 1,790.1 1,009.6 5,889.9 69.6% 2,024.0

4.00 1154.00 866.0 4,965.7 143.6 1,933.7 1,009.6 6,899.4 72.0% 2,009.4

4.50 1154.50 841.3 5,807.0 153.5 2,087.2 994.8 7,894.2 73.6% 1,964.3

5.00 1155.00 789.5 6,596.5 174.2 2,261.4 963.7 8,857.9 74.5% 1,884.1

5.50 1155.50 704.8 7,301.3 208.1 2,469.5 912.9 9,770.8 74.7% 1,758.2

6.00 1156.00 571.9 7,873.2 261.2 2,730.7 833.1 10,603.9 74.2% 1,557.1

6.50 1156.50 326.4 8,199.6 359.5 3,090.2 685.8 11,289.7 72.6% 980.0

7.00 1157.00 0.0 8,199.6 490.0 3,580.2 490.0 11,779.7 69.6% 980.0

Contech Engineered Solutions, LLC is pleased to offer the following estimate of storage volume for the above named project. The results are submitted as an

estimate only, without liability on the part of Contech Engineered Solutions, LLC for accuracy or suitability to any particular applicaton and are subject to

verification of the Engineer of Record. This tool is only applicable for rectangular shaped systems.

CMP: Underground Detention System

Storage Volume Estimation

Summary of InputsPipe & Analysis InformationSystem Information Backfill Information

Pipe Stone Total SystemSystem

Storage Volume Estimation

Miscellaneous

These results are submitted to you as a guideline only, without liability on the part of CONTECH Engineered Solutions, LLC for accuracy or suitability to

any particular application, and are subject to your verification.

U n i t H y d r o g r a p h A n a l y s i s Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2004, Version 7.0 Study date 12/09/21 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ San Bernardino County Synthetic Unit Hydrology Method Manual date - August 1986 Program License Serial Number 6145 --------------------------------------------------------------------- 3rd at Central Industrial 100 YEAR STORM EVENT - EXISTING UNITHYDROGRAPH 4509E100UH RP -------------------------------------------------------------------- Storm Event Year = 100 Antecedent Moisture Condition = 3 English (in-lb) Input Units Used English Rainfall Data (Inches) Input Values Used English Units used in output format Area averaged rainfall intensity isohyetal data: Sub-Area Duration Isohyetal (Ac.) (hours) (In) Rainfall data for year 100 3.02 1 1.28 -------------------------------------------------------------------- Rainfall data for year 100 3.02 6 2.56 -------------------------------------------------------------------- Rainfall data for year 100 3.02 24 5.70 -------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area-averaged max loss rate, Fm ******** SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm No.(AMCII) NO.(AMC 3) (Ac.) Fraction (In/Hr) (dec.) (In/Hr) 32.0 52.0 3.02 1.000 0.785 0.900 0.707 Area-averaged adjusted loss rate Fm (In/Hr) = 0.707 ********* Area-Averaged low loss rate fraction, Yb ********** Area Area SCS CN SCS CN S Pervious

(Ac.) Fract (AMC2) (AMC3) Yield Fr 2.72 0.900 32.0 52.0 9.23 0.199 0.30 0.100 98.0 98.0 0.20 0.958 Area-averaged catchment yield fraction, Y = 0.275 Area-averaged low loss fraction, Yb = 0.725 User entry of time of concentration = 0.189 (hours) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 3.02(Ac.) Catchment Lag time = 0.151 hours Unit interval = 5.000 minutes Unit interval percentage of lag time = 55.1146 Hydrograph baseflow = 0.00(CFS) Average maximum watershed loss rate(Fm) = 0.707(In/Hr) Average low loss rate fraction (Yb) = 0.725 (decimal) VALLEY UNDEVELOPED S-Graph Selected Computed peak 5-minute rainfall = 0.474(In) Computed peak 30-minute rainfall = 0.970(In) Specified peak 1-hour rainfall = 1.280(In) Computed peak 3-hour rainfall = 1.958(In) Specified peak 6-hour rainfall = 2.560(In) Specified peak 24-hour rainfall = 5.700(In) Rainfall depth area reduction factors: Using a total area of 3.02(Ac.) (Ref: fig. E-4) 5-minute factor = 1.000 Adjusted rainfall = 0.474(In) 30-minute factor = 1.000 Adjusted rainfall = 0.970(In) 1-hour factor = 1.000 Adjusted rainfall = 1.280(In) 3-hour factor = 1.000 Adjusted rainfall = 1.958(In) 6-hour factor = 1.000 Adjusted rainfall = 2.560(In) 24-hour factor = 1.000 Adjusted rainfall = 5.700(In) --------------------------------------------------------------------- U n i t H y d r o g r a p h +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph Number Mean values ((CFS)) --------------------------------------------------------------------- (K = 36.52 (CFS)) 1 7.145 2.610 2 37.471 11.076 3 65.463 10.223 4 76.824 4.150 5 83.227 2.338 6 87.623 1.606 7 90.809 1.164 8 93.106 0.839 9 94.853 0.638 10 96.318 0.535 11 97.415 0.401 12 98.269 0.312 13 98.889 0.227 14 99.440 0.201 15 100.000 0.101 --------------------------------------------------------------------- -------------------------------------------------------------------- -------------------------------------------------------------------- Total soil rain loss = 3.77(In) Total effective rainfall = 1.93(In) Peak flow rate in flood hydrograph = 5.97(CFS)

--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M R u n o f f H y d r o g r a p h -------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS)) -------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0001 0.01 Q | | | | 0+10 0.0004 0.04 Q | | | | 0+15 0.0009 0.08 Q | | | | 0+20 0.0015 0.09 Q | | | | 0+25 0.0021 0.10 Q | | | | 0+30 0.0028 0.10 Q | | | | 0+35 0.0036 0.11 Q | | | | 0+40 0.0043 0.11 Q | | | | 0+45 0.0051 0.11 Q | | | | 0+50 0.0058 0.11 Q | | | | 0+55 0.0066 0.11 Q | | | | 1+ 0 0.0074 0.12 Q | | | | 1+ 5 0.0082 0.12 Q | | | | 1+10 0.0090 0.12 Q | | | | 1+15 0.0098 0.12 Q | | | | 1+20 0.0106 0.12 Q | | | | 1+25 0.0115 0.12 Q | | | | 1+30 0.0123 0.12 QV | | | | 1+35 0.0131 0.12 QV | | | | 1+40 0.0139 0.12 QV | | | | 1+45 0.0147 0.12 QV | | | | 1+50 0.0156 0.12 QV | | | | 1+55 0.0164 0.12 QV | | | | 2+ 0 0.0172 0.12 QV | | | | 2+ 5 0.0180 0.12 QV | | | | 2+10 0.0189 0.12 QV | | | | 2+15 0.0197 0.12 QV | | | | 2+20 0.0205 0.12 QV | | | | 2+25 0.0214 0.12 QV | | | | 2+30 0.0222 0.12 QV | | | | 2+35 0.0230 0.12 QV | | | | 2+40 0.0239 0.12 QV | | | | 2+45 0.0247 0.12 Q V | | | | 2+50 0.0256 0.12 Q V | | | | 2+55 0.0264 0.12 Q V | | | | 3+ 0 0.0273 0.12 Q V | | | | 3+ 5 0.0281 0.12 Q V | | | | 3+10 0.0290 0.12 Q V | | | | 3+15 0.0299 0.12 Q V | | | | 3+20 0.0307 0.13 Q V | | | | 3+25 0.0316 0.13 Q V | | | | 3+30 0.0325 0.13 Q V | | | | 3+35 0.0333 0.13 Q V | | | | 3+40 0.0342 0.13 Q V | | | | 3+45 0.0351 0.13 Q V | | | | 3+50 0.0359 0.13 Q V | | | | 3+55 0.0368 0.13 Q V | | | | 4+ 0 0.0377 0.13 Q V | | | | 4+ 5 0.0386 0.13 Q V | | | | 4+10 0.0395 0.13 Q V | | | | 4+15 0.0404 0.13 Q V | | | | 4+20 0.0413 0.13 Q V | | | | 4+25 0.0422 0.13 Q V | | | |

4+30 0.0430 0.13 Q V | | | | 4+35 0.0439 0.13 Q V | | | | 4+40 0.0448 0.13 Q V | | | | 4+45 0.0458 0.13 Q V | | | | 4+50 0.0467 0.13 Q V | | | | 4+55 0.0476 0.13 Q V | | | | 5+ 0 0.0485 0.13 Q V | | | | 5+ 5 0.0494 0.13 Q V | | | | 5+10 0.0503 0.13 Q V | | | | 5+15 0.0512 0.13 Q V | | | | 5+20 0.0522 0.13 Q V | | | | 5+25 0.0531 0.13 Q V | | | | 5+30 0.0540 0.14 Q V | | | | 5+35 0.0550 0.14 Q V | | | | 5+40 0.0559 0.14 Q V | | | | 5+45 0.0568 0.14 Q V | | | | 5+50 0.0578 0.14 Q V | | | | 5+55 0.0587 0.14 Q V | | | | 6+ 0 0.0597 0.14 Q V | | | | 6+ 5 0.0606 0.14 Q V | | | | 6+10 0.0616 0.14 Q V | | | | 6+15 0.0626 0.14 Q V | | | | 6+20 0.0635 0.14 Q V | | | | 6+25 0.0645 0.14 Q V | | | | 6+30 0.0655 0.14 Q V | | | | 6+35 0.0664 0.14 Q V | | | | 6+40 0.0674 0.14 Q V | | | | 6+45 0.0684 0.14 Q V | | | | 6+50 0.0694 0.14 Q V | | | | 6+55 0.0704 0.14 Q V | | | | 7+ 0 0.0713 0.14 Q V | | | | 7+ 5 0.0723 0.14 Q V | | | | 7+10 0.0733 0.15 Q V | | | | 7+15 0.0743 0.15 Q V | | | | 7+20 0.0754 0.15 Q V | | | | 7+25 0.0764 0.15 Q V | | | | 7+30 0.0774 0.15 Q V | | | | 7+35 0.0784 0.15 Q V | | | | 7+40 0.0794 0.15 Q V | | | | 7+45 0.0805 0.15 Q V | | | | 7+50 0.0815 0.15 Q V | | | | 7+55 0.0825 0.15 Q V | | | | 8+ 0 0.0836 0.15 Q V | | | | 8+ 5 0.0846 0.15 Q V | | | | 8+10 0.0857 0.15 Q V | | | | 8+15 0.0867 0.15 Q V | | | | 8+20 0.0878 0.15 Q V | | | | 8+25 0.0888 0.15 Q V | | | | 8+30 0.0899 0.16 Q V | | | | 8+35 0.0910 0.16 Q V | | | | 8+40 0.0921 0.16 Q V | | | | 8+45 0.0931 0.16 Q V | | | | 8+50 0.0942 0.16 Q V | | | | 8+55 0.0953 0.16 Q V | | | | 9+ 0 0.0964 0.16 Q V | | | | 9+ 5 0.0975 0.16 Q V | | | | 9+10 0.0986 0.16 Q V | | | | 9+15 0.0997 0.16 Q V | | | | 9+20 0.1009 0.16 Q V | | | | 9+25 0.1020 0.16 Q V | | | | 9+30 0.1031 0.16 Q V | | | | 9+35 0.1043 0.17 Q V | | | | 9+40 0.1054 0.17 Q V | | | |

9+45 0.1066 0.17 Q V | | | | 9+50 0.1077 0.17 Q V | | | | 9+55 0.1089 0.17 Q V | | | | 10+ 0 0.1101 0.17 Q V| | | | 10+ 5 0.1112 0.17 Q V| | | | 10+10 0.1124 0.17 Q V| | | | 10+15 0.1136 0.17 Q V| | | | 10+20 0.1148 0.17 Q V| | | | 10+25 0.1160 0.17 Q V| | | | 10+30 0.1172 0.18 Q V| | | | 10+35 0.1184 0.18 Q V| | | | 10+40 0.1197 0.18 Q V| | | | 10+45 0.1209 0.18 Q V| | | | 10+50 0.1221 0.18 Q V | | | 10+55 0.1234 0.18 Q V | | | 11+ 0 0.1246 0.18 Q V | | | 11+ 5 0.1259 0.18 Q V | | | 11+10 0.1272 0.19 Q V | | | 11+15 0.1285 0.19 Q V | | | 11+20 0.1298 0.19 Q V | | | 11+25 0.1311 0.19 Q V | | | 11+30 0.1324 0.19 Q V | | | 11+35 0.1337 0.19 Q |V | | | 11+40 0.1350 0.19 Q |V | | | 11+45 0.1364 0.19 Q |V | | | 11+50 0.1377 0.20 Q |V | | | 11+55 0.1391 0.20 Q |V | | | 12+ 0 0.1405 0.20 Q |V | | | 12+ 5 0.1418 0.20 Q |V | | | 12+10 0.1431 0.18 Q |V | | | 12+15 0.1442 0.16 Q |V | | | 12+20 0.1452 0.15 Q |V | | | 12+25 0.1463 0.15 Q | V | | | 12+30 0.1473 0.15 Q | V | | | 12+35 0.1483 0.15 Q | V | | | 12+40 0.1494 0.15 Q | V | | | 12+45 0.1504 0.15 Q | V | | | 12+50 0.1515 0.15 Q | V | | | 12+55 0.1525 0.15 Q | V | | | 13+ 0 0.1536 0.16 Q | V | | | 13+ 5 0.1547 0.16 Q | V | | | 13+10 0.1558 0.16 Q | V | | | 13+15 0.1569 0.16 Q | V | | | 13+20 0.1581 0.17 Q | V | | | 13+25 0.1593 0.17 Q | V | | | 13+30 0.1604 0.17 Q | V | | | 13+35 0.1616 0.18 Q | V | | | 13+40 0.1629 0.18 Q | V | | | 13+45 0.1641 0.18 Q | V | | | 13+50 0.1654 0.19 Q | V | | | 13+55 0.1667 0.19 Q | V | | | 14+ 0 0.1681 0.19 Q | V | | | 14+ 5 0.1694 0.20 Q | V | | | 14+10 0.1708 0.20 Q | V | | | 14+15 0.1723 0.21 Q | V | | | 14+20 0.1738 0.21 Q | V | | | 14+25 0.1753 0.22 Q | V | | | 14+30 0.1768 0.23 Q | V | | | 14+35 0.1784 0.23 Q | V | | | 14+40 0.1801 0.24 Q | V | | | 14+45 0.1818 0.25 Q | V | | | 14+50 0.1836 0.26 |Q | V | | | 14+55 0.1854 0.27 |Q | V | | |

15+ 0 0.1873 0.28 |Q | V | | | 15+ 5 0.1893 0.29 |Q | V | | | 15+10 0.1914 0.30 |Q | V | | | 15+15 0.1936 0.32 |Q | V | | | 15+20 0.1960 0.34 |Q | V | | | 15+25 0.1984 0.36 |Q | V | | | 15+30 0.2011 0.39 |Q | V | | | 15+35 0.2040 0.42 |Q | V | | | 15+40 0.2071 0.46 |Q | V | | | 15+45 0.2106 0.51 | Q | V | | | 15+50 0.2146 0.57 | Q | V | | | 15+55 0.2196 0.72 | Q | V | | | 16+ 0 0.2279 1.21 | Q | V | | | 16+ 5 0.2474 2.84 | |Q V | | 16+10 0.2885 5.97 | | | Q | | 16+15 0.3245 5.23 | | Q V | | 16+20 0.3426 2.63 | Q | V | | 16+25 0.3544 1.71 | Q | | V| | 16+30 0.3633 1.29 | Q | | V | 16+35 0.3703 1.01 | Q | | V | 16+40 0.3759 0.81 | Q | | |V | 16+45 0.3805 0.68 | Q | | |V | 16+50 0.3846 0.59 | Q | | |V | 16+55 0.3881 0.50 | Q | | | V | 17+ 0 0.3910 0.43 |Q | | | V | 17+ 5 0.3936 0.37 |Q | | | V | 17+10 0.3959 0.33 |Q | | | V | 17+15 0.3978 0.27 |Q | | | V | 17+20 0.3992 0.22 Q | | | V | 17+25 0.4006 0.20 Q | | | V | 17+30 0.4020 0.19 Q | | | V | 17+35 0.4032 0.18 Q | | | V | 17+40 0.4045 0.18 Q | | | V | 17+45 0.4056 0.17 Q | | | V | 17+50 0.4068 0.16 Q | | | V | 17+55 0.4078 0.16 Q | | | V | 18+ 0 0.4089 0.15 Q | | | V | 18+ 5 0.4100 0.15 Q | | | V | 18+10 0.4111 0.17 Q | | | V | 18+15 0.4124 0.19 Q | | | V | 18+20 0.4137 0.19 Q | | | V | 18+25 0.4150 0.19 Q | | | V | 18+30 0.4163 0.19 Q | | | V | 18+35 0.4176 0.19 Q | | | V | 18+40 0.4189 0.19 Q | | | V | 18+45 0.4202 0.19 Q | | | V | 18+50 0.4215 0.18 Q | | | V | 18+55 0.4227 0.18 Q | | | V | 19+ 0 0.4240 0.18 Q | | | V | 19+ 5 0.4252 0.18 Q | | | V | 19+10 0.4264 0.18 Q | | | V | 19+15 0.4276 0.17 Q | | | V | 19+20 0.4288 0.17 Q | | | V | 19+25 0.4300 0.17 Q | | | V | 19+30 0.4311 0.17 Q | | | V | 19+35 0.4323 0.17 Q | | | V | 19+40 0.4334 0.17 Q | | | V | 19+45 0.4346 0.16 Q | | | V | 19+50 0.4357 0.16 Q | | | V | 19+55 0.4368 0.16 Q | | | V | 20+ 0 0.4379 0.16 Q | | | V | 20+ 5 0.4389 0.16 Q | | | V | 20+10 0.4400 0.16 Q | | | V |

20+15 0.4411 0.15 Q | | | V | 20+20 0.4421 0.15 Q | | | V | 20+25 0.4432 0.15 Q | | | V | 20+30 0.4442 0.15 Q | | | V | 20+35 0.4452 0.15 Q | | | V | 20+40 0.4463 0.15 Q | | | V | 20+45 0.4473 0.15 Q | | | V | 20+50 0.4483 0.15 Q | | | V | 20+55 0.4493 0.14 Q | | | V | 21+ 0 0.4503 0.14 Q | | | V | 21+ 5 0.4512 0.14 Q | | | V | 21+10 0.4522 0.14 Q | | | V | 21+15 0.4532 0.14 Q | | | V | 21+20 0.4541 0.14 Q | | | V | 21+25 0.4551 0.14 Q | | | V | 21+30 0.4560 0.14 Q | | | V | 21+35 0.4570 0.14 Q | | | V | 21+40 0.4579 0.14 Q | | | V | 21+45 0.4588 0.13 Q | | | V | 21+50 0.4597 0.13 Q | | | V | 21+55 0.4607 0.13 Q | | | V | 22+ 0 0.4616 0.13 Q | | | V | 22+ 5 0.4625 0.13 Q | | | V | 22+10 0.4634 0.13 Q | | | V | 22+15 0.4643 0.13 Q | | | V | 22+20 0.4652 0.13 Q | | | V | 22+25 0.4660 0.13 Q | | | V | 22+30 0.4669 0.13 Q | | | V | 22+35 0.4678 0.13 Q | | | V | 22+40 0.4687 0.13 Q | | | V | 22+45 0.4695 0.13 Q | | | V | 22+50 0.4704 0.12 Q | | | V | 22+55 0.4712 0.12 Q | | | V | 23+ 0 0.4721 0.12 Q | | | V| 23+ 5 0.4729 0.12 Q | | | V| 23+10 0.4738 0.12 Q | | | V| 23+15 0.4746 0.12 Q | | | V| 23+20 0.4754 0.12 Q | | | V| 23+25 0.4763 0.12 Q | | | V| 23+30 0.4771 0.12 Q | | | V| 23+35 0.4779 0.12 Q | | | V| 23+40 0.4787 0.12 Q | | | V| 23+45 0.4795 0.12 Q | | | V| 23+50 0.4804 0.12 Q | | | V| 23+55 0.4812 0.12 Q | | | V| 24+ 0 0.4820 0.12 Q | | | V| 24+ 5 0.4827 0.11 Q | | | V| 24+10 0.4832 0.07 Q | | | V| 24+15 0.4835 0.04 Q | | | V| 24+20 0.4837 0.03 Q | | | V| 24+25 0.4838 0.02 Q | | | V| 24+30 0.4839 0.01 Q | | | V| 24+35 0.4840 0.01 Q | | | V| 24+40 0.4840 0.01 Q | | | V| 24+45 0.4841 0.01 Q | | | V| 24+50 0.4841 0.00 Q | | | V| 24+55 0.4841 0.00 Q | | | V| 25+ 0 0.4841 0.00 Q | | | V| 25+ 5 0.4841 0.00 Q | | | V| 25+10 0.4841 0.00 Q | | | V -----------------------------------------------------------------------

U n i t H y d r o g r a p h A n a l y s i s Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2004, Version 7.0 Study date 12/09/21 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ San Bernardino County Synthetic Unit Hydrology Method Manual date - August 1986 Program License Serial Number 6145 --------------------------------------------------------------------- 3rd at Central Industrial 100 YEAR STORM EVENT - PROPOSED UNITHYDROGRAPH 4509P100UH RP -------------------------------------------------------------------- Storm Event Year = 100 Antecedent Moisture Condition = 3 English (in-lb) Input Units Used English Rainfall Data (Inches) Input Values Used English Units used in output format Area averaged rainfall intensity isohyetal data: Sub-Area Duration Isohyetal (Ac.) (hours) (In) Rainfall data for year 100 3.02 1 1.28 -------------------------------------------------------------------- Rainfall data for year 100 3.02 6 2.56 -------------------------------------------------------------------- Rainfall data for year 100 3.02 24 5.70 -------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area-averaged max loss rate, Fm ******** SCS curve SCS curve Area Area Fp(Fig C6) Ap Fm No.(AMCII) NO.(AMC 3) (Ac.) Fraction (In/Hr) (dec.) (In/Hr) 32.0 52.0 3.02 1.000 0.785 0.100 0.079 Area-averaged adjusted loss rate Fm (In/Hr) = 0.079 ********* Area-Averaged low loss rate fraction, Yb ********** Area Area SCS CN SCS CN S Pervious

(Ac.) Fract (AMC2) (AMC3) Yield Fr 0.30 0.100 32.0 52.0 9.23 0.199 2.72 0.900 98.0 98.0 0.20 0.958 Area-averaged catchment yield fraction, Y = 0.882 Area-averaged low loss fraction, Yb = 0.118 User entry of time of concentration = 0.121 (hours) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Watershed area = 3.02(Ac.) Catchment Lag time = 0.097 hours Unit interval = 5.000 minutes Unit interval percentage of lag time = 86.0882 Hydrograph baseflow = 0.00(CFS) Average maximum watershed loss rate(Fm) = 0.079(In/Hr) Average low loss rate fraction (Yb) = 0.118 (decimal) VALLEY DEVELOPED S-Graph Selected Computed peak 5-minute rainfall = 0.474(In) Computed peak 30-minute rainfall = 0.970(In) Specified peak 1-hour rainfall = 1.280(In) Computed peak 3-hour rainfall = 1.958(In) Specified peak 6-hour rainfall = 2.560(In) Specified peak 24-hour rainfall = 5.700(In) Rainfall depth area reduction factors: Using a total area of 3.02(Ac.) (Ref: fig. E-4) 5-minute factor = 1.000 Adjusted rainfall = 0.474(In) 30-minute factor = 1.000 Adjusted rainfall = 0.970(In) 1-hour factor = 1.000 Adjusted rainfall = 1.280(In) 3-hour factor = 1.000 Adjusted rainfall = 1.958(In) 6-hour factor = 1.000 Adjusted rainfall = 2.560(In) 24-hour factor = 1.000 Adjusted rainfall = 5.700(In) --------------------------------------------------------------------- U n i t H y d r o g r a p h +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph Number Mean values ((CFS)) --------------------------------------------------------------------- (K = 36.52 (CFS)) 1 12.973 4.738 2 69.324 20.581 3 95.650 9.615 4 99.222 1.305 5 100.000 0.284 --------------------------------------------------------------------- -------------------------------------------------------------------- -------------------------------------------------------------------- Total soil rain loss = 0.59(In) Total effective rainfall = 5.11(In) Peak flow rate in flood hydrograph = 11.56(CFS) --------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M R u n o f f H y d r o g r a p h -------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS)) -------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 5.0 10.0 15.0 20.0 -----------------------------------------------------------------------

0+ 5 0.0003 0.05 Q | | | | 0+10 0.0021 0.26 Q | | | | 0+15 0.0045 0.35 Q | | | | 0+20 0.0070 0.37 Q | | | | 0+25 0.0096 0.37 Q | | | | 0+30 0.0122 0.37 Q | | | | 0+35 0.0147 0.37 Q | | | | 0+40 0.0173 0.37 Q | | | | 0+45 0.0199 0.37 Q | | | | 0+50 0.0225 0.37 Q | | | | 0+55 0.0250 0.38 Q | | | | 1+ 0 0.0276 0.38 Q | | | | 1+ 5 0.0302 0.38 Q | | | | 1+10 0.0328 0.38 QV | | | | 1+15 0.0355 0.38 QV | | | | 1+20 0.0381 0.38 QV | | | | 1+25 0.0407 0.38 QV | | | | 1+30 0.0433 0.38 QV | | | | 1+35 0.0460 0.38 QV | | | | 1+40 0.0486 0.38 QV | | | | 1+45 0.0513 0.38 QV | | | | 1+50 0.0539 0.39 QV | | | | 1+55 0.0566 0.39 QV | | | | 2+ 0 0.0592 0.39 QV | | | | 2+ 5 0.0619 0.39 QV | | | | 2+10 0.0646 0.39 Q V | | | | 2+15 0.0673 0.39 Q V | | | | 2+20 0.0700 0.39 Q V | | | | 2+25 0.0727 0.39 Q V | | | | 2+30 0.0754 0.39 Q V | | | | 2+35 0.0781 0.39 Q V | | | | 2+40 0.0809 0.40 Q V | | | | 2+45 0.0836 0.40 Q V | | | | 2+50 0.0863 0.40 Q V | | | | 2+55 0.0891 0.40 Q V | | | | 3+ 0 0.0918 0.40 Q V | | | | 3+ 5 0.0946 0.40 Q V | | | | 3+10 0.0974 0.40 Q V | | | | 3+15 0.1001 0.40 Q V | | | | 3+20 0.1029 0.40 Q V | | | | 3+25 0.1057 0.41 Q V | | | | 3+30 0.1085 0.41 Q V | | | | 3+35 0.1113 0.41 Q V | | | | 3+40 0.1141 0.41 Q V | | | | 3+45 0.1169 0.41 Q V | | | | 3+50 0.1198 0.41 Q V | | | | 3+55 0.1226 0.41 Q V | | | | 4+ 0 0.1255 0.41 Q V | | | | 4+ 5 0.1283 0.41 Q V | | | | 4+10 0.1312 0.42 Q V | | | | 4+15 0.1341 0.42 Q V | | | | 4+20 0.1369 0.42 Q V | | | | 4+25 0.1398 0.42 Q V | | | | 4+30 0.1427 0.42 Q V | | | | 4+35 0.1456 0.42 Q V | | | | 4+40 0.1485 0.42 Q V | | | | 4+45 0.1515 0.42 Q V | | | | 4+50 0.1544 0.43 Q V | | | | 4+55 0.1573 0.43 Q V | | | | 5+ 0 0.1603 0.43 Q V | | | | 5+ 5 0.1633 0.43 Q V | | | | 5+10 0.1662 0.43 Q V | | | | 5+15 0.1692 0.43 Q V | | | |

5+20 0.1722 0.43 Q V | | | | 5+25 0.1752 0.44 Q V | | | | 5+30 0.1782 0.44 Q V | | | | 5+35 0.1812 0.44 Q V | | | | 5+40 0.1843 0.44 Q V | | | | 5+45 0.1873 0.44 Q V | | | | 5+50 0.1904 0.44 Q V | | | | 5+55 0.1934 0.44 Q V | | | | 6+ 0 0.1965 0.45 Q V | | | | 6+ 5 0.1996 0.45 Q V | | | | 6+10 0.2027 0.45 Q V | | | | 6+15 0.2058 0.45 Q V | | | | 6+20 0.2089 0.45 Q V | | | | 6+25 0.2120 0.45 Q V | | | | 6+30 0.2151 0.46 Q V | | | | 6+35 0.2183 0.46 Q V | | | | 6+40 0.2215 0.46 Q V | | | | 6+45 0.2246 0.46 Q V | | | | 6+50 0.2278 0.46 Q V | | | | 6+55 0.2310 0.46 Q V | | | | 7+ 0 0.2342 0.47 Q V | | | | 7+ 5 0.2374 0.47 Q V | | | | 7+10 0.2407 0.47 Q V | | | | 7+15 0.2439 0.47 Q V | | | | 7+20 0.2472 0.47 Q V | | | | 7+25 0.2505 0.48 Q V | | | | 7+30 0.2537 0.48 Q V | | | | 7+35 0.2570 0.48 Q V | | | | 7+40 0.2604 0.48 Q V | | | | 7+45 0.2637 0.48 Q V | | | | 7+50 0.2670 0.49 Q V | | | | 7+55 0.2704 0.49 Q V | | | | 8+ 0 0.2737 0.49 Q V | | | | 8+ 5 0.2771 0.49 Q V | | | | 8+10 0.2805 0.49 Q V | | | | 8+15 0.2839 0.50 Q V | | | | 8+20 0.2874 0.50 Q V | | | | 8+25 0.2908 0.50 |Q V| | | | 8+30 0.2943 0.50 |Q V| | | | 8+35 0.2977 0.50 |Q V| | | | 8+40 0.3012 0.51 |Q V| | | | 8+45 0.3048 0.51 |Q V| | | | 8+50 0.3083 0.51 |Q V| | | | 8+55 0.3118 0.51 |Q V| | | | 9+ 0 0.3154 0.52 |Q V| | | | 9+ 5 0.3190 0.52 |Q V| | | | 9+10 0.3226 0.52 |Q V | | | 9+15 0.3262 0.52 |Q V | | | 9+20 0.3298 0.53 |Q V | | | 9+25 0.3335 0.53 |Q V | | | 9+30 0.3371 0.53 |Q V | | | 9+35 0.3408 0.54 |Q V | | | 9+40 0.3445 0.54 |Q V | | | 9+45 0.3483 0.54 |Q V | | | 9+50 0.3520 0.54 |Q V | | | 9+55 0.3558 0.55 |Q |V | | | 10+ 0 0.3596 0.55 |Q |V | | | 10+ 5 0.3634 0.55 |Q |V | | | 10+10 0.3672 0.56 |Q |V | | | 10+15 0.3711 0.56 |Q |V | | | 10+20 0.3750 0.56 |Q |V | | | 10+25 0.3789 0.57 |Q |V | | | 10+30 0.3828 0.57 |Q |V | | |

10+35 0.3868 0.57 |Q | V | | | 10+40 0.3907 0.58 |Q | V | | | 10+45 0.3948 0.58 |Q | V | | | 10+50 0.3988 0.59 |Q | V | | | 10+55 0.4028 0.59 |Q | V | | | 11+ 0 0.4069 0.59 |Q | V | | | 11+ 5 0.4111 0.60 |Q | V | | | 11+10 0.4152 0.60 |Q | V | | | 11+15 0.4194 0.61 |Q | V | | | 11+20 0.4236 0.61 |Q | V | | | 11+25 0.4278 0.61 |Q | V | | | 11+30 0.4321 0.62 |Q | V | | | 11+35 0.4364 0.62 |Q | V | | | 11+40 0.4407 0.63 |Q | V | | | 11+45 0.4451 0.63 |Q | V | | | 11+50 0.4495 0.64 |Q | V | | | 11+55 0.4539 0.64 |Q | V | | | 12+ 0 0.4584 0.65 |Q | V | | | 12+ 5 0.4627 0.63 |Q | V | | | 12+10 0.4662 0.51 |Q | V | | | 12+15 0.4694 0.46 Q | V | | | 12+20 0.4725 0.46 Q | V | | | 12+25 0.4757 0.46 Q | V | | | 12+30 0.4789 0.47 Q | V | | | 12+35 0.4822 0.47 Q | V | | | 12+40 0.4855 0.48 Q | V | | | 12+45 0.4889 0.49 Q | V | | | 12+50 0.4923 0.50 Q | V | | | 12+55 0.4957 0.50 |Q | V | | | 13+ 0 0.4993 0.51 |Q | V | | | 13+ 5 0.5028 0.52 |Q | V | | | 13+10 0.5065 0.53 |Q | V | | | 13+15 0.5102 0.54 |Q | V | | | 13+20 0.5139 0.55 |Q | V | | | 13+25 0.5178 0.56 |Q | V | | | 13+30 0.5217 0.57 |Q | V | | | 13+35 0.5257 0.58 |Q | V | | | 13+40 0.5297 0.59 |Q | V | | | 13+45 0.5339 0.60 |Q | V | | | 13+50 0.5381 0.62 |Q | V | | | 13+55 0.5425 0.63 |Q | V | | | 14+ 0 0.5469 0.65 |Q | V | | | 14+ 5 0.5515 0.66 |Q | V | | | 14+10 0.5561 0.68 |Q | V | | | 14+15 0.5609 0.69 |Q | V | | | 14+20 0.5659 0.72 |Q | V | | | 14+25 0.5709 0.73 |Q | V | | | 14+30 0.5761 0.76 |Q | V | | | 14+35 0.5815 0.78 |Q | V | | | 14+40 0.5871 0.81 |Q | V | | | 14+45 0.5928 0.84 |Q | V | | | 14+50 0.5988 0.87 |Q | V | | | 14+55 0.6050 0.90 |Q | V | | | 15+ 0 0.6115 0.94 |Q | V| | | 15+ 5 0.6183 0.98 |Q | V| | | 15+10 0.6255 1.04 | Q | V| | | 15+15 0.6330 1.09 | Q | V| | | 15+20 0.6410 1.16 | Q | V| | | 15+25 0.6495 1.24 | Q | V | | 15+30 0.6589 1.36 | Q | V | | 15+35 0.6692 1.48 | Q | V | | 15+40 0.6805 1.64 | Q | |V | | 15+45 0.6931 1.83 | Q | |V | |

15+50 0.7079 2.16 | Q | | V | | 15+55 0.7259 2.61 | Q | | V | | 16+ 0 0.7506 3.59 | Q | | V | | 16+ 5 0.7940 6.30 | | Q | V | | 16+10 0.8736 11.56 | | | Q V | | 16+15 0.9196 6.68 | | Q | V | | 16+20 0.9388 2.79 | Q | | V| | 16+25 0.9514 1.83 | Q | | V| | 16+30 0.9610 1.39 | Q | | V| | 16+35 0.9692 1.19 | Q | | V | 16+40 0.9764 1.05 | Q | | V | 16+45 0.9830 0.95 |Q | | V | 16+50 0.9891 0.88 |Q | | V | 16+55 0.9947 0.82 |Q | | V | 17+ 0 0.9999 0.76 |Q | | |V | 17+ 5 1.0049 0.72 |Q | | |V | 17+10 1.0096 0.68 |Q | | |V | 17+15 1.0141 0.65 |Q | | |V | 17+20 1.0183 0.62 |Q | | |V | 17+25 1.0224 0.59 |Q | | |V | 17+30 1.0263 0.57 |Q | | |V | 17+35 1.0301 0.55 |Q | | | V | 17+40 1.0338 0.53 |Q | | | V | 17+45 1.0373 0.51 |Q | | | V | 17+50 1.0407 0.50 Q | | | V | 17+55 1.0441 0.48 Q | | | V | 18+ 0 1.0473 0.47 Q | | | V | 18+ 5 1.0506 0.48 Q | | | V | 18+10 1.0547 0.60 |Q | | | V | 18+15 1.0591 0.64 |Q | | | V | 18+20 1.0635 0.64 |Q | | | V | 18+25 1.0679 0.63 |Q | | | V | 18+30 1.0722 0.62 |Q | | | V | 18+35 1.0764 0.61 |Q | | | V | 18+40 1.0805 0.60 |Q | | | V | 18+45 1.0846 0.59 |Q | | | V | 18+50 1.0886 0.59 |Q | | | V | 18+55 1.0926 0.58 |Q | | | V | 19+ 0 1.0966 0.57 |Q | | | V | 19+ 5 1.1005 0.56 |Q | | | V | 19+10 1.1043 0.56 |Q | | | V | 19+15 1.1081 0.55 |Q | | | V | 19+20 1.1119 0.55 |Q | | | V | 19+25 1.1156 0.54 |Q | | | V | 19+30 1.1192 0.53 |Q | | | V | 19+35 1.1229 0.53 |Q | | | V | 19+40 1.1265 0.52 |Q | | | V | 19+45 1.1300 0.52 |Q | | | V | 19+50 1.1336 0.51 |Q | | | V | 19+55 1.1371 0.51 |Q | | | V | 20+ 0 1.1405 0.50 |Q | | | V | 20+ 5 1.1440 0.50 Q | | | V | 20+10 1.1474 0.49 Q | | | V | 20+15 1.1507 0.49 Q | | | V | 20+20 1.1541 0.49 Q | | | V | 20+25 1.1574 0.48 Q | | | V | 20+30 1.1607 0.48 Q | | | V | 20+35 1.1639 0.47 Q | | | V | 20+40 1.1672 0.47 Q | | | V | 20+45 1.1704 0.47 Q | | | V | 20+50 1.1736 0.46 Q | | | V | 20+55 1.1767 0.46 Q | | | V | 21+ 0 1.1799 0.46 Q | | | V |

21+ 5 1.1830 0.45 Q | | | V | 21+10 1.1861 0.45 Q | | | V | 21+15 1.1892 0.45 Q | | | V | 21+20 1.1922 0.44 Q | | | V | 21+25 1.1953 0.44 Q | | | V | 21+30 1.1983 0.44 Q | | | V | 21+35 1.2013 0.43 Q | | | V | 21+40 1.2042 0.43 Q | | | V | 21+45 1.2072 0.43 Q | | | V | 21+50 1.2101 0.43 Q | | | V | 21+55 1.2130 0.42 Q | | | V | 22+ 0 1.2159 0.42 Q | | | V | 22+ 5 1.2188 0.42 Q | | | V | 22+10 1.2217 0.42 Q | | | V | 22+15 1.2245 0.41 Q | | | V | 22+20 1.2274 0.41 Q | | | V | 22+25 1.2302 0.41 Q | | | V | 22+30 1.2330 0.41 Q | | | V | 22+35 1.2358 0.40 Q | | | V | 22+40 1.2385 0.40 Q | | | V | 22+45 1.2413 0.40 Q | | | V | 22+50 1.2440 0.40 Q | | | V | 22+55 1.2468 0.40 Q | | | V | 23+ 0 1.2495 0.39 Q | | | V | 23+ 5 1.2522 0.39 Q | | | V| 23+10 1.2549 0.39 Q | | | V| 23+15 1.2575 0.39 Q | | | V| 23+20 1.2602 0.39 Q | | | V| 23+25 1.2628 0.38 Q | | | V| 23+30 1.2655 0.38 Q | | | V| 23+35 1.2681 0.38 Q | | | V| 23+40 1.2707 0.38 Q | | | V| 23+45 1.2733 0.38 Q | | | V| 23+50 1.2759 0.38 Q | | | V| 23+55 1.2784 0.37 Q | | | V| 24+ 0 1.2810 0.37 Q | | | V| 24+ 5 1.2832 0.32 Q | | | V| 24+10 1.2840 0.11 Q | | | V| 24+15 1.2841 0.02 Q | | | V| 24+20 1.2841 0.00 Q | | | V| -----------------------------------------------------------------------

FLOOD HYDROGRAPH ROUTING PROGRAM Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2005 Study date: 02/03/22 --------------------------------------------------------------------- 3RD AT CENTRAL INDUSTRIAL 100 YEAR STORM EVENT - UG ROUTING STUDY 4509ROUTING RP -------------------------------------------------------------------- Program License Serial Number 6145 -------------------------------------------------------------------- ********************* HYDROGRAPH INFORMATION ********************** From study/file name: 4509P100UH.rte ****************************HYDROGRAPH DATA**************************** Number of intervals = 292 Time interval = 5.0 (Min.) Maximum/Peak flow rate = 11.555 (CFS) Total volume = 1.284 (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 5.000 to Point/Station 6.000 **** RETARDING BASIN ROUTING **** ______________________________________________________________________ User entry of depth-outflow-storage data -------------------------------------------------------------------- Total number of inflow hydrograph intervals = 292 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) --------------------------------------------------------------------- -------------------------------------------------------------------- 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 0.011 0.560 0.009 0.013 1.500 0.046 0.560 0.044 0.048 2.500 0.089 0.560 0.087 0.091 3.500 0.135 0.560 0.133 0.137 4.500 0.181 0.560 0.179 0.183 5.500 0.224 0.560 0.222 0.226

6.500 0.259 0.560 0.257 0.261 7.000 0.270 0.560 0.268 0.272 7.500 0.271 3.340 0.259 0.283 8.000 0.272 6.120 0.251 0.293 -------------------------------------------------------------------- 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 2.9 5.78 8.67 11.56 (Ft.) 0.083 0.05 0.01 0.000 O | | | | 0.01 0.167 0.26 0.05 0.001 O | | | | 0.04 0.250 0.35 0.13 0.002 O | | | | 0.11 0.333 0.37 0.20 0.004 OI | | | | 0.17 0.417 0.37 0.25 0.005 OI | | | | 0.22 0.500 0.37 0.28 0.006 OI | | | | 0.25 0.583 0.37 0.31 0.006 OI | | | | 0.28 0.667 0.37 0.33 0.006 OI | | | | 0.29 0.750 0.37 0.34 0.007 OI | | | | 0.31 0.833 0.37 0.35 0.007 OI | | | | 0.31 0.917 0.38 0.36 0.007 OI | | | | 0.32 1.000 0.38 0.36 0.007 |O | | | | 0.33 1.083 0.38 0.37 0.007 |O | | | | 0.33 1.167 0.38 0.37 0.007 |O | | | | 0.33 1.250 0.38 0.37 0.007 |O | | | | 0.33 1.333 0.38 0.38 0.007 |O | | | | 0.34 1.417 0.38 0.38 0.007 |O | | | | 0.34 1.500 0.38 0.38 0.007 |O | | | | 0.34 1.583 0.38 0.38 0.007 |O | | | | 0.34 1.667 0.38 0.38 0.007 |O | | | | 0.34 1.750 0.38 0.38 0.007 |O | | | | 0.34 1.833 0.39 0.38 0.008 |O | | | | 0.34 1.917 0.39 0.38 0.008 |O | | | | 0.34 2.000 0.39 0.38 0.008 |O | | | | 0.34 2.083 0.39 0.39 0.008 |O | | | | 0.34 2.167 0.39 0.39 0.008 |O | | | | 0.35 2.250 0.39 0.39 0.008 |O | | | | 0.35 2.333 0.39 0.39 0.008 |O | | | | 0.35 2.417 0.39 0.39 0.008 |O | | | | 0.35 2.500 0.39 0.39 0.008 |O | | | | 0.35 2.583 0.39 0.39 0.008 |O | | | | 0.35 2.667 0.40 0.39 0.008 |O | | | | 0.35 2.750 0.40 0.39 0.008 |O | | | | 0.35 2.833 0.40 0.39 0.008 |O | | | | 0.35 2.917 0.40 0.40 0.008 |O | | | | 0.35 3.000 0.40 0.40 0.008 |O | | | | 0.35 3.083 0.40 0.40 0.008 |O | | | | 0.36 3.167 0.40 0.40 0.008 |O | | | | 0.36 3.250 0.40 0.40 0.008 |O | | | | 0.36 3.333 0.40 0.40 0.008 |O | | | | 0.36 3.417 0.41 0.40 0.008 |O | | | | 0.36 3.500 0.41 0.40 0.008 |O | | | | 0.36 3.583 0.41 0.40 0.008 |O | | | | 0.36 3.667 0.41 0.41 0.008 |O | | | | 0.36 3.750 0.41 0.41 0.008 |O | | | | 0.36 3.833 0.41 0.41 0.008 |O | | | | 0.36 3.917 0.41 0.41 0.008 |O | | | | 0.37 4.000 0.41 0.41 0.008 |O | | | | 0.37 4.083 0.41 0.41 0.008 |O | | | | 0.37 4.167 0.42 0.41 0.008 |O | | | | 0.37 4.250 0.42 0.41 0.008 |O | | | | 0.37

4.333 0.42 0.41 0.008 |O | | | | 0.37 4.417 0.42 0.42 0.008 |O | | | | 0.37 4.500 0.42 0.42 0.008 |O | | | | 0.37 4.583 0.42 0.42 0.008 |O | | | | 0.37 4.667 0.42 0.42 0.008 |O | | | | 0.37 4.750 0.42 0.42 0.008 |O | | | | 0.38 4.833 0.43 0.42 0.008 |O | | | | 0.38 4.917 0.43 0.42 0.008 |O | | | | 0.38 5.000 0.43 0.42 0.008 |O | | | | 0.38 5.083 0.43 0.43 0.008 |O | | | | 0.38 5.167 0.43 0.43 0.008 |O | | | | 0.38 5.250 0.43 0.43 0.008 |O | | | | 0.38 5.333 0.43 0.43 0.008 |O | | | | 0.38 5.417 0.44 0.43 0.008 |O | | | | 0.39 5.500 0.44 0.43 0.009 |O | | | | 0.39 5.583 0.44 0.43 0.009 |O | | | | 0.39 5.667 0.44 0.44 0.009 |O | | | | 0.39 5.750 0.44 0.44 0.009 |O | | | | 0.39 5.833 0.44 0.44 0.009 |O | | | | 0.39 5.917 0.44 0.44 0.009 |O | | | | 0.39 6.000 0.45 0.44 0.009 |O | | | | 0.39 6.083 0.45 0.44 0.009 |O | | | | 0.40 6.167 0.45 0.44 0.009 |O | | | | 0.40 6.250 0.45 0.45 0.009 |O | | | | 0.40 6.333 0.45 0.45 0.009 |O | | | | 0.40 6.417 0.45 0.45 0.009 |O | | | | 0.40 6.500 0.46 0.45 0.009 |O | | | | 0.40 6.583 0.46 0.45 0.009 |O | | | | 0.40 6.667 0.46 0.45 0.009 |O | | | | 0.41 6.750 0.46 0.46 0.009 |O | | | | 0.41 6.833 0.46 0.46 0.009 |O | | | | 0.41 6.917 0.46 0.46 0.009 |O | | | | 0.41 7.000 0.47 0.46 0.009 |O | | | | 0.41 7.083 0.47 0.46 0.009 |O | | | | 0.41 7.167 0.47 0.46 0.009 |O | | | | 0.41 7.250 0.47 0.47 0.009 |O | | | | 0.42 7.333 0.47 0.47 0.009 |O | | | | 0.42 7.417 0.48 0.47 0.009 |O | | | | 0.42 7.500 0.48 0.47 0.009 |O | | | | 0.42 7.583 0.48 0.47 0.009 |O | | | | 0.42 7.667 0.48 0.48 0.009 |O | | | | 0.42 7.750 0.48 0.48 0.009 |O | | | | 0.43 7.833 0.49 0.48 0.009 |O | | | | 0.43 7.917 0.49 0.48 0.009 |O | | | | 0.43 8.000 0.49 0.48 0.009 |O | | | | 0.43 8.083 0.49 0.49 0.010 |O | | | | 0.43 8.167 0.49 0.49 0.010 |O | | | | 0.44 8.250 0.50 0.49 0.010 |O | | | | 0.44 8.333 0.50 0.49 0.010 |O | | | | 0.44 8.417 0.50 0.49 0.010 |O | | | | 0.44 8.500 0.50 0.50 0.010 |O | | | | 0.44 8.583 0.50 0.50 0.010 |O | | | | 0.44 8.667 0.51 0.50 0.010 |O | | | | 0.45 8.750 0.51 0.50 0.010 |O | | | | 0.45 8.833 0.51 0.51 0.010 |O | | | | 0.45 8.917 0.51 0.51 0.010 |O | | | | 0.45 9.000 0.52 0.51 0.010 |O | | | | 0.46 9.083 0.52 0.51 0.010 |O | | | | 0.46 9.167 0.52 0.51 0.010 |O | | | | 0.46 9.250 0.52 0.52 0.010 |O | | | | 0.46 9.333 0.53 0.52 0.010 |O | | | | 0.46 9.417 0.53 0.52 0.010 |O | | | | 0.47 9.500 0.53 0.53 0.010 |O | | | | 0.47

9.583 0.54 0.53 0.010 |O | | | | 0.47 9.667 0.54 0.53 0.010 |O | | | | 0.47 9.750 0.54 0.53 0.010 |O | | | | 0.48 9.833 0.54 0.54 0.011 |O | | | | 0.48 9.917 0.55 0.54 0.011 |O | | | | 0.48 10.000 0.55 0.54 0.011 |O | | | | 0.48 10.083 0.55 0.55 0.011 |O | | | | 0.49 10.167 0.56 0.55 0.011 |O | | | | 0.49 10.250 0.56 0.55 0.011 |O | | | | 0.49 10.333 0.56 0.55 0.011 |O | | | | 0.50 10.417 0.57 0.56 0.011 |O | | | | 0.50 10.500 0.57 0.56 0.011 |O | | | | 0.50 10.583 0.57 0.56 0.011 |O | | | | 0.50 10.667 0.58 0.56 0.011 |O | | | | 0.51 10.750 0.58 0.56 0.011 |O | | | | 0.51 10.833 0.59 0.56 0.012 |O | | | | 0.52 10.917 0.59 0.56 0.012 |O | | | | 0.52 11.000 0.59 0.56 0.012 |O | | | | 0.53 11.083 0.60 0.56 0.012 |O | | | | 0.53 11.167 0.60 0.56 0.012 |O | | | | 0.54 11.250 0.61 0.56 0.013 |O | | | | 0.55 11.333 0.61 0.56 0.013 |O | | | | 0.56 11.417 0.61 0.56 0.013 |O | | | | 0.57 11.500 0.62 0.56 0.014 |O | | | | 0.58 11.583 0.62 0.56 0.014 |O | | | | 0.59 11.667 0.63 0.56 0.015 |O | | | | 0.61 11.750 0.63 0.56 0.015 |O | | | | 0.62 11.833 0.64 0.56 0.016 |O | | | | 0.64 11.917 0.64 0.56 0.016 |O | | | | 0.65 12.000 0.65 0.56 0.017 |O | | | | 0.67 12.083 0.63 0.56 0.017 |O | | | | 0.68 12.167 0.51 0.56 0.018 |O | | | | 0.69 12.250 0.46 0.56 0.017 |O | | | | 0.67 12.333 0.46 0.56 0.016 |O | | | | 0.65 12.417 0.46 0.56 0.016 |O | | | | 0.63 12.500 0.47 0.56 0.015 |O | | | | 0.61 12.583 0.47 0.56 0.014 |O | | | | 0.59 12.667 0.48 0.56 0.014 |O | | | | 0.58 12.750 0.49 0.56 0.013 |O | | | | 0.56 12.833 0.50 0.56 0.013 |O | | | | 0.55 12.917 0.50 0.56 0.012 |O | | | | 0.54 13.000 0.51 0.56 0.012 |O | | | | 0.53 13.083 0.52 0.56 0.012 |O | | | | 0.52 13.167 0.53 0.56 0.011 |O | | | | 0.51 13.250 0.54 0.56 0.011 |O | | | | 0.51 13.333 0.55 0.56 0.011 |O | | | | 0.50 13.417 0.56 0.56 0.011 |O | | | | 0.50 13.500 0.57 0.56 0.011 |O | | | | 0.50 13.583 0.58 0.56 0.011 |O | | | | 0.50 13.667 0.59 0.56 0.011 |O | | | | 0.51 13.750 0.60 0.56 0.012 |O | | | | 0.52 13.833 0.62 0.56 0.012 |O | | | | 0.53 13.917 0.63 0.56 0.012 |O | | | | 0.54 14.000 0.65 0.56 0.013 |O | | | | 0.55 14.083 0.66 0.56 0.014 |O | | | | 0.57 14.167 0.68 0.56 0.014 |O | | | | 0.59 14.250 0.69 0.56 0.015 |O | | | | 0.62 14.333 0.72 0.56 0.016 |O | | | | 0.65 14.417 0.73 0.56 0.017 |OI | | | | 0.68 14.500 0.76 0.56 0.019 |OI | | | | 0.72 14.583 0.78 0.56 0.020 |OI | | | | 0.76 14.667 0.81 0.56 0.022 |OI | | | | 0.80 14.750 0.84 0.56 0.023 |OI | | | | 0.86

14.833 0.87 0.56 0.025 |OI | | | | 0.91 14.917 0.90 0.56 0.028 |OI | | | | 0.98 15.000 0.94 0.56 0.030 |OI | | | | 1.05 15.083 0.98 0.56 0.033 |OI | | | | 1.13 15.167 1.04 0.56 0.036 |OI | | | | 1.22 15.250 1.09 0.56 0.040 |O I | | | | 1.32 15.333 1.16 0.56 0.043 |O I | | | | 1.43 15.417 1.24 0.56 0.048 |O I | | | | 1.54 15.500 1.36 0.56 0.053 |O I | | | | 1.66 15.583 1.48 0.56 0.059 |O I | | | | 1.80 15.667 1.64 0.56 0.066 |O I | | | | 1.96 15.750 1.83 0.56 0.074 |O I | | | | 2.15 15.833 2.16 0.56 0.084 |O I | | | | 2.38 15.917 2.61 0.56 0.096 |O I| | | | 2.66 16.000 3.59 0.56 0.114 |O |I | | | 3.04 16.083 6.30 0.56 0.144 |O | |I | | 3.70 16.167 11.56 0.56 0.202 |O | | | I 4.98 16.250 6.68 0.56 0.261 |O | | I | | 6.58 16.333 2.79 5.67 0.272 | I| O| | | 7.92 16.417 1.83 0.56 0.266 |O I | | | | 6.83 16.500 1.39 1.49 0.270 | IO | | | | 7.17 16.583 1.19 1.12 0.270 | O | | | | 7.10 16.667 1.05 1.12 0.270 | IO | | | | 7.10 16.750 0.95 0.91 0.270 | O | | | | 7.06 16.833 0.88 0.92 0.270 | O | | | | 7.06 16.917 0.82 0.79 0.270 | O | | | | 7.04 17.000 0.76 0.79 0.270 | O | | | | 7.04 17.083 0.72 0.70 0.270 |O | | | | 7.03 17.167 0.68 0.70 0.270 |O | | | | 7.03 17.250 0.65 0.64 0.270 |O | | | | 7.01 17.333 0.62 0.63 0.270 |O | | | | 7.01 17.417 0.59 0.59 0.270 |O | | | | 7.00 17.500 0.57 0.58 0.270 |O | | | | 7.00 17.583 0.55 0.56 0.270 |O | | | | 7.00 17.667 0.53 0.56 0.270 |O | | | | 6.99 17.750 0.51 0.56 0.270 |O | | | | 6.98 17.833 0.50 0.56 0.269 |O | | | | 6.96 17.917 0.48 0.56 0.269 |O | | | | 6.94 18.000 0.47 0.56 0.268 |O | | | | 6.91 18.083 0.48 0.56 0.268 |O | | | | 6.89 18.167 0.60 0.56 0.267 |O | | | | 6.88 18.250 0.64 0.56 0.268 |O | | | | 6.90 18.333 0.64 0.56 0.268 |O | | | | 6.92 18.417 0.63 0.56 0.269 |O | | | | 6.95 18.500 0.62 0.56 0.269 |O | | | | 6.97 18.583 0.61 0.56 0.270 |O | | | | 6.99 18.667 0.60 0.56 0.270 |O | | | | 7.00 18.750 0.59 0.63 0.270 |O | | | | 7.01 18.833 0.59 0.56 0.270 |O | | | | 7.00 18.917 0.58 0.60 0.270 |O | | | | 7.01 19.000 0.57 0.56 0.270 |O | | | | 7.00 19.083 0.56 0.57 0.270 |O | | | | 7.00 19.167 0.56 0.56 0.270 |O | | | | 7.00 19.250 0.55 0.56 0.270 |O | | | | 7.00 19.333 0.55 0.56 0.270 |O | | | | 6.99 19.417 0.54 0.56 0.270 |O | | | | 6.99 19.500 0.53 0.56 0.270 |O | | | | 6.98 19.583 0.53 0.56 0.269 |O | | | | 6.97 19.667 0.52 0.56 0.269 |O | | | | 6.96 19.750 0.52 0.56 0.269 |O | | | | 6.95 19.833 0.51 0.56 0.269 |O | | | | 6.93 19.917 0.51 0.56 0.268 |O | | | | 6.92 20.000 0.50 0.56 0.268 |O | | | | 6.90

20.083 0.50 0.56 0.267 |O | | | | 6.88 20.167 0.49 0.56 0.267 |O | | | | 6.86 20.250 0.49 0.56 0.267 |O | | | | 6.84 20.333 0.49 0.56 0.266 |O | | | | 6.82 20.417 0.48 0.56 0.265 |O | | | | 6.79 20.500 0.48 0.56 0.265 |O | | | | 6.77 20.583 0.47 0.56 0.264 |O | | | | 6.74 20.667 0.47 0.56 0.264 |O | | | | 6.72 20.750 0.47 0.56 0.263 |O | | | | 6.69 20.833 0.46 0.56 0.262 |O | | | | 6.66 20.917 0.46 0.56 0.262 |O | | | | 6.63 21.000 0.46 0.56 0.261 |O | | | | 6.59 21.083 0.45 0.56 0.260 |O | | | | 6.56 21.167 0.45 0.56 0.260 |O | | | | 6.53 21.250 0.45 0.56 0.259 |O | | | | 6.49 21.333 0.44 0.56 0.258 |O | | | | 6.47 21.417 0.44 0.56 0.257 |O | | | | 6.45 21.500 0.44 0.56 0.256 |O | | | | 6.42 21.583 0.43 0.56 0.256 |O | | | | 6.40 21.667 0.43 0.56 0.255 |O | | | | 6.38 21.750 0.43 0.56 0.254 |O | | | | 6.35 21.833 0.43 0.56 0.253 |O | | | | 6.32 21.917 0.42 0.56 0.252 |O | | | | 6.30 22.000 0.42 0.56 0.251 |O | | | | 6.27 22.083 0.42 0.56 0.250 |O | | | | 6.24 22.167 0.42 0.56 0.249 |O | | | | 6.21 22.250 0.41 0.56 0.248 |O | | | | 6.19 22.333 0.41 0.56 0.247 |O | | | | 6.16 22.417 0.41 0.56 0.246 |O | | | | 6.13 22.500 0.41 0.56 0.245 |O | | | | 6.10 22.583 0.40 0.56 0.244 |O | | | | 6.07 22.667 0.40 0.56 0.243 |O | | | | 6.04 22.750 0.40 0.56 0.242 |O | | | | 6.01 22.833 0.40 0.56 0.241 |O | | | | 5.97 22.917 0.40 0.56 0.239 |O | | | | 5.94 23.000 0.39 0.56 0.238 |O | | | | 5.91 23.083 0.39 0.56 0.237 |O | | | | 5.88 23.167 0.39 0.56 0.236 |O | | | | 5.84 23.250 0.39 0.56 0.235 |O | | | | 5.81 23.333 0.39 0.56 0.234 |O | | | | 5.77 23.417 0.38 0.56 0.232 |O | | | | 5.74 23.500 0.38 0.56 0.231 |O | | | | 5.71 23.583 0.38 0.56 0.230 |O | | | | 5.67 23.667 0.38 0.56 0.229 |O | | | | 5.63 23.750 0.38 0.56 0.227 |O | | | | 5.60 23.833 0.38 0.56 0.226 |O | | | | 5.56 23.917 0.37 0.56 0.225 |O | | | | 5.53 24.000 0.37 0.56 0.224 |O | | | | 5.49 24.083 0.32 0.56 0.222 IO | | | | 5.46 24.167 0.11 0.56 0.220 IO | | | | 5.40 24.250 0.02 0.56 0.216 IO | | | | 5.32 24.333 0.00 0.56 0.213 IO | | | | 5.23 24.417 0.00 0.56 0.209 IO | | | | 5.15 24.500 0.00 0.56 0.205 IO | | | | 5.06 24.583 0.00 0.56 0.201 IO | | | | 4.97 24.667 0.00 0.56 0.197 IO | | | | 4.88 24.750 0.00 0.56 0.193 IO | | | | 4.79 24.833 0.00 0.56 0.189 IO | | | | 4.70 24.917 0.00 0.56 0.186 IO | | | | 4.61 25.000 0.00 0.56 0.182 IO | | | | 4.52 25.083 0.00 0.56 0.178 IO | | | | 4.43 25.167 0.00 0.56 0.174 IO | | | | 4.35 25.250 0.00 0.56 0.170 IO | | | | 4.26

25.333 0.00 0.56 0.166 IO | | | | 4.18 25.417 0.00 0.56 0.162 IO | | | | 4.10 25.500 0.00 0.56 0.159 IO | | | | 4.01 25.583 0.00 0.56 0.155 IO | | | | 3.93 25.667 0.00 0.56 0.151 IO | | | | 3.85 25.750 0.00 0.56 0.147 IO | | | | 3.76 25.833 0.00 0.56 0.143 IO | | | | 3.68 25.917 0.00 0.56 0.139 IO | | | | 3.59 26.000 0.00 0.56 0.135 IO | | | | 3.51 26.083 0.00 0.56 0.132 IO | | | | 3.43 26.167 0.00 0.56 0.128 IO | | | | 3.34 26.250 0.00 0.56 0.124 IO | | | | 3.26 26.333 0.00 0.56 0.120 IO | | | | 3.18 26.417 0.00 0.56 0.116 IO | | | | 3.09 26.500 0.00 0.56 0.112 IO | | | | 3.01 26.583 0.00 0.56 0.108 IO | | | | 2.92 26.667 0.00 0.56 0.105 IO | | | | 2.84 26.750 0.00 0.56 0.101 IO | | | | 2.76 26.833 0.00 0.56 0.097 IO | | | | 2.67 26.917 0.00 0.56 0.093 IO | | | | 2.59 27.000 0.00 0.56 0.089 IO | | | | 2.50 27.083 0.00 0.56 0.085 IO | | | | 2.41 27.167 0.00 0.56 0.081 IO | | | | 2.33 27.250 0.00 0.56 0.078 IO | | | | 2.24 27.333 0.00 0.56 0.074 IO | | | | 2.15 27.417 0.00 0.56 0.070 IO | | | | 2.06 27.500 0.00 0.56 0.066 IO | | | | 1.97 27.583 0.00 0.56 0.062 IO | | | | 1.88 27.667 0.00 0.56 0.058 IO | | | | 1.79 27.750 0.00 0.56 0.054 IO | | | | 1.70 27.833 0.00 0.56 0.051 IO | | | | 1.61 27.917 0.00 0.56 0.047 IO | | | | 1.52 28.000 0.00 0.56 0.043 IO | | | | 1.41 28.083 0.00 0.56 0.039 IO | | | | 1.30 28.167 0.00 0.56 0.035 IO | | | | 1.19 28.250 0.00 0.56 0.031 IO | | | | 1.08 28.333 0.00 0.56 0.027 IO | | | | 0.97 28.417 0.00 0.56 0.024 IO | | | | 0.86 28.500 0.00 0.56 0.020 IO | | | | 0.75 28.583 0.00 0.56 0.016 IO | | | | 0.64 28.667 0.00 0.56 0.012 IO | | | | 0.53 28.750 0.00 0.44 0.009 IO | | | | 0.39 28.833 0.00 0.31 0.006 O | | | | 0.28 28.917 0.00 0.22 0.004 O | | | | 0.19 29.000 0.00 0.15 0.003 O | | | | 0.14 29.083 0.00 0.11 0.002 O | | | | 0.10 29.167 0.00 0.07 0.001 O | | | | 0.07 29.250 0.00 0.05 0.001 O | | | | 0.05 29.333 0.00 0.04 0.001 O | | | | 0.03 29.417 0.00 0.03 0.001 O | | | | 0.02 29.500 0.00 0.02 0.000 O | | | | 0.02 29.583 0.00 0.01 0.000 O | | | | 0.01 29.667 0.00 0.01 0.000 O | | | | 0.01 29.750 0.00 0.01 0.000 O | | | | 0.01 29.833 0.00 0.00 0.000 O | | | | 0.00 29.917 0.00 0.00 0.000 O | | | | 0.00 30.000 0.00 0.00 0.000 O | | | | 0.00 30.083 0.00 0.00 0.000 O | | | | 0.00 30.167 0.00 0.00 0.000 O | | | | 0.00 ****************************HYDROGRAPH DATA**************************** Number of intervals = 362 Time interval = 5.0 (Min.)

Maximum/Peak flow rate = 5.669 (CFS) Total volume = 1.284 (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 *********************************************************************** --------------------------------------------------------------------

Appendix D

Soil Group Map and Isohyetal Map

Page 1 of 2Stormwater Facility Mapping

12/3/2021http://permitrack.sbcounty.gov/wap/

Appendix E

Selected References