ADH1.8-in16-yr

BAP0.5-in2-yr

BCO0.6-in2-yr

BIF0.7-in4-yr

BIX0.6-in2-yr

BLD1.8-in5-yr

CCP1.6-in25-yr

CRK1.0-in3-yr

DBF1.7-in21-yr

DBL1.9-in11-yr

DVB2.3-in94-yr

ESB1.2-in4-yr

FCD1.6-in32-yr

GCC2.3-in> 500 -yr

HLD1.0-in3-yr

ISD0.7-in3-yr

KGR0.8-in2-yr

MCF1.5-in12-yr

MCR0.9-in4-yr

MDP2.3-in110-yr

MED1.0-in7-yr

ORF2.0-in11-yr

RIC1.5-in9-yr

RKY1.6-in5-yr

ROF1.0-in4-yr

RRG0.8-in3-yr

RSS2.5-in149-yr

SMC2.5-in44-yr

TAS1.7-in40-yr

WDN0.9-in2-yr

WSF1.5-in33-yr

YGF1.7-in47-yr

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

3 Hr. Duration Storm Freq.0 - 5 Years5.1 - 10 Years10.1 - 25 Years25.1 - 50 Years50.1 - 100 Years100.1 - 500 Years> 500 Years

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH2.9-in33-yr

BAP1.1-in4-yr

BCO1.0-in4-yr

BIF1.2-in7-yr

BIX1.0-in4-yr

BLD2.9-in9-yr

CCP2.4-in43-yr

CRK1.6-in4-yr

DBF2.7-in34-yr

DBL3.1-in24-yr

DVB3.5-in224-yr

ESB2.1-in10-yr

FCD2.8-in149-yr

GCC3.6-in> 500 -yr

HLD1.8-in6-yr

ISD1.3-in7-yr

KGR1.2-in2-yr

MCF2.4-in29-yr

MCR1.6-in15-yr

MDP3.3-in173-yr

MED1.5-in12-yr

ORF3.4-in34-yr

RIC2.6-in25-yr

RKY2.4-in6-yr

ROF1.9-in9-yr

RRG1.5-in7-yr

RSS3.9-in> 500 -yr

SMC3.8-in75-yr

TAS2.5-in49-yr

WDN1.6-in3-yr

WSF2.4-in92-yr

YGF2.7-in99-yr

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

6 Hr. Duration Storm Freq.0 - 5 Years5.1 - 10 Years10.1 - 25 Years25.1 - 50 Years50.1 - 100 Years100.1 - 500 Years> 500 Years

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH4.3-in47-yr

BAP1.7-in6-yr

BCO1.5-in4-yr

BIF1.8-in9-yr

BIX1.6-in6-yr

BLD5.4-in35-yr

CCP3.5-in60-yr

CRK2.5-in7-yr

DBF4.1-in59-yr

DBL4.8-in43-yr

DVB5.3-in> 500 -yr

ESB3.5-in23-yr

FCD4.1-in271-yr

GCC5.2-in> 500 -yr

HLD2.8-in9-yr

ISD1.9-in10-yr

KGR1.8-in2-yr

MCF3.7-in58-yr

MCR2.3-in18-yr

MDP4.9-in343-yr

MED2.2-in20-yr

ORF5.6-in97-yr

RIC3.7-in31-yr

RKY3.6-in9-yr

ROF3.5-in46-yr

RRG2.1-in9-yr

RSS5.9-in> 500 -yr

SMC6.0-in258-yr

TAS3.5-in74-yr

WDN2.5-in4-yr

WSF3.5-in159-yr

YGF3.8-in155-yr

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

12 Hr. Duration Storm Freq.0 - 5 Years5.1 - 10 Years10.1 - 25 Years25.1 - 50 Years50.1 - 100 Years100.1 - 500 Years> 500 Years

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH6.5-in108-yr

BAP1.9-in4-yr

BCO1.8-in4-yr

BIF2.3-in9-yr

BIX1.9-in5-yr

BLD8.6-in81-yr

CCP4.2-in34-yr

CRK4.0-in14-yr

DBF5.6-in53-yr

DBL7.1-in72-yr

DVB7.1-in478-yr

ESB6.0-in98-yr

FCD5.6-in

317-yrGCC7.0-in> 500 -yr

HLD3.8-in9-yr

ISD2.5-in10-yr

KGR2.1-in2-yr

MCF5.3-in78-yr

MCR2.8-in10-yr

MDP6.7-in327-yr

MED2.7-in12-yr

ORF8.1-in155-yr

RIC6.1-in96-yr

RKY5.5-in15-yr

ROF5.5-in156-yr

RRG2.6-in7-yr

RSS8.2-in> 500 -yr

SMC8.8-in480-yr

TAS4.6-in55-yr

WDN3.4-in4-yr

WSF4.6-in146-yr

YGF5.2-in161-yr

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

24 Hr. Duration Storm Freq.0 - 5 Years5.1 - 10 Years10.1 - 25 Years25.1 - 50 Years50.1 - 100 Years100.1 - 500 Years> 500 Years

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH7.4-in34-yr

BAP2.2-in3-yr

BCO2.2-in3-yr

BIF2.9-in8-yr

BIX2.4-in5-yr

BLD9.9-in30-yr

CCP4.7-in13-yr

CRK4.4-in6-yr

DBF6.1-in20-yr

DBL8.5-in34-yr

DVB8.0-in76-yr

ESB6.5-in26-yr

FCD6.2-in48-yr

GCC7.6-in375-yr

HLD4.5-in6-yr

ISD3.2-in9-yr

KGR2.5-in2-yr

MCF6.1-in32-yr

MCR3.2-in6-yr

MDP7.6-in61-yr

MED3.3-in9-yr

ORF9.0-in35-yr

RIC6.7-in28-yr

RKY6.8-in10-yr

ROF6.1-in39-yr

RRG3.0-in4-yr

RSS8.9-in170-yr

SMC10.0-in85-yr

TAS5.2-in22-yr

WDN4.0-in3-yr

WSF4.9-in31-yr

YGF5.6-in35-yr

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

48 Hr. Duration Storm Freq.0 - 5 Years5.1 - 10 Years10.1 - 25 Years25.1 - 50 Years50.1 - 100 Years100.1 - 500 Years> 500 Years

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH7.8-in11-yr

BAP2.5-in2-yr

BCO2.3-in2-yr

BIF3.1-in4-yr

BIX2.5-in3-yr

BLD11.4-in16-yr

CCP5.0-in6-yr

CRK4.9-in4-yr

DBF6.6-in8-yr

DBL10.1-in22-yr

DVB8.4-in24-yr

ESB7.5-in14-yr

FCD6.4-in17-yr

GCC7.9-in52-yr

HLD4.9-in4-yr

ISD3.3-in4-yr

KGR2.7-in1-yr

MCF6.5-in11-yr

MCR3.2-in4-yr

MDP8.2-in24-yr

MED3.5-in5-yr

ORF9.8-in14-yr

RIC7.8-in18-yr

RKY7.4-in5-yr

ROF6.8-in19-yr

RRG3.1-in3-yr

RSS9.5-in38-yrSMC

10.8-in27-yr

TAS5.6-in9-yr

WDN4.5-in2-yr

WSF5.3-in12-yr

YGF6.0-in13-yr

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

96 Hr. Duration Storm Freq.0 - 5 Years5.1 - 10 Years10.1 - 25 Years25.1 - 50 Years50.1 - 100 Years100.1 - 500 Years> 500 Years

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH6.5-in24-hrs108-yr

BAP1.7-in12-hrs6-yr

BCO1.5-in12-hrs4-yr

BIF1.8-in12-hrs9-yr

BIX1.6-in12-hrs6-yr

BLD8.6-in24-hrs81-yr

CCP3.5-in12-hrs60-yr

CRK4.0-in24-hrs14-yr

DBF4.1-in12-hrs59-yr

DBL7.1-in24-hrs72-yr

DVB5.3-in12-hrs> 500 -yr

ESB6.0-in24-hrs98-yr

FCD5.6-in

24-hrs317-yr

GCC7.0-in24-hrs> 500 -yr

HLD3.8-in24-hrs9-yr

ISD1.9-in12-hrs10-yr

KGR1.8-in12-hrs2-yr

MCF5.3-in24-hrs78-yr

MCR2.3-in12-hrs18-yr

MDP4.9-in12-hrs343-yr

MED2.2-in12-hrs20-yr

ORF8.1-in24-hrs155-yr

RIC6.1-in24-hrs96-yr

RKY5.5-in24-hrs15-yr

ROF5.5-in24-hrs156-yr

RRG2.1-in12-hrs9-yr

RSS8.2-in24-hrs> 500 -yrSMC

8.8-in24-hrs480-yr

TAS3.5-in12-hrs74-yr

WDN3.4-in24-hrs4-yr

WSF3.5-in12-hrs159-yr

YGF5.2-in24-hrs161-yr

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

Max Storm Frequency0 - 5 Years5.1 - 10 Years10.1 - 25 Years25.1 - 50 Years50.1 - 100 Years100.1 - 500 Years> 500 Years

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH7.2-in

BAP2.1-in

BCO2.2-in

BIF2.9-in

BIX2.4-in

BLD9.9-in

CCP4.7-in

CRK4.4-in

DBF6.1-in

DBL8.5-in

DVB7.9-in

ESB6.5-in

FCD6.1-in

GCC7.6-in

HLD4.5-in

ISD3.1-in

KGR2.5-in

MCF6.1-in MCR

3.1-in

MDP7.5-in

MED3.3-in

ORF9.0-in

RIC6.7-in

RKY6.8-in

ROF6.1-in

RRG3.0-in

RSS8.9-in

SMC10.0-in

TAS5.2-in

WDN4.0-in

WSF4.9-in

YGF5.6-in

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Monday, November 8, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

Storm Totals (inches)

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour

ADH

BAP

BCO

BIF

BIX

BLD

CCP

CRK

DBF

DBL

DVB

ESB FCD

GCC

HLD

ISD

KGR

MCFMCR

MDP

MED

ORF

RIC

RKY

ROF

RRG

RSSSMC

TAS

WDN

WSF

YGF

Storm total = depth of rain ina storm with a storm beingdefined as a period startingafter at least 12 hours of norain.

Contra Costa County Flood Control and Water Conservation District Storm Report Rain Gauge Exhibit

October 24-25, 2021 Storm

PREPARED BY:CONTRA COSTA COUNTYCOMPUTER SERVICES - MAPPING SCIENCES SECTION

255 GLACIER DRIVEMARTINEZ, CALIFORNIA 94553

PUBLIC WORKS DEPARTMENT2004 CONTRA COSTA COUNTY©

Copyright and DisclaimerThis map contains copyrighted information. Reproducing all orany portion of this map is an infringement of copyright law.Users of this map agree to read and accept County of ContraCosta disclaimer of liability and warranties provided herewith.

Date: Thursday, November 4, 2021 Path: P:\GIS USERS - Development\FC\Hydrology\Projects\Gauges\2021-10-24 Event\Rain Gauges 2021-10-24.mxd BY: M. Boucher

Relative depths for eachduration

5.7D3D6D12D24D48D96

LegendWatershedsCityLimitsCreeksAll values are preliminary and subject

to revision. Question regarding thisexhibit should be directed to the FC

District Hydrologist at(925) 313-2000.

.0 5 102.5 Miles

Local community drainage systems are typicallydesigned for the 10-year storm. Regional floodprotection systems are typically designed for the 25-to 100-year storms. See endnotes on report memofor more details.

Find Report at www.contracosta.ca.gov/1456/Storm-Event-ReportsDurations reported are 3-, 6-, 12-, 24-, 48- and 96-hour