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RIO VERDE RIO VERDE AREA DRAINAGEAREA DRAINAGEMASTER PLANMASTER PLAN
Felicia Terry, P.E.Felicia Terry, P.E.Project ManagerProject Manager
Flood Control District of Maricopa CountyFlood Control District of Maricopa County
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Area PhotographsArea Photographs
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Area PhotographsArea Photographs
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Area PhotographsArea Photographs
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West County West County FloodingFlooding
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West County West County FloodingFlooding
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Mission StatementMission Statement
The mission of the Flood Control The mission of the Flood Control District of Maricopa County is to District of Maricopa County is to
provide flood hazard identification, provide flood hazard identification, regulation, remediation, and regulation, remediation, and
education to the residents of Maricopa education to the residents of Maricopa County, to reduce their risks of injury, County, to reduce their risks of injury, death, and property damage due to death, and property damage due to
flooding while allowing them to enjoy flooding while allowing them to enjoy the natural and beneficial values the natural and beneficial values
provided by floodplains. provided by floodplains.
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Area DrainageArea DrainageMaster PlansMaster Plans
(ADMP)(ADMP) Provides flood control management Provides flood control management
recommendations that mitigate identified recommendations that mitigate identified flood and erosion hazards.flood and erosion hazards.
How is an ADMP Developed?How is an ADMP Developed? Data CollectionData Collection Alternatives formulation and evaluationAlternatives formulation and evaluation Public InvolvementPublic Involvement Recommended AlternativeRecommended Alternative
Implementation ProcessImplementation Process PrioritizePrioritize Design/ConstructionDesign/Construction FundingFunding
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Project HistoryProject History
Rio Verde North Extension
Rio Verde South Extension
Rio Verde North
Rio Verde South
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Rio Verde Study AreaRio Verde Study Area
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Project ScheduleProject Schedule
May
May
May
May
May
May
July
July
July
July
Septe
mb
er
Septe
mb
er
Septe
mb
er
Septe
mb
er
Novem
ber
Novem
ber
Novem
ber
Novem
ber
Janu
ary
Janu
ary
Janu
ary
Janu
ary
Marc
hM
arc
h
Marc
hM
arc
h
Data Collection, Analysis & ReviewData Collection, Analysis & Review
Alternative Formulation & EvaluationAlternative Formulation & Evaluation
Plan ImplementationPlan Implementation
Public InvolvementPublic Involvement
20022002 20032003 20042004
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RIO VERDE RIO VERDE FLOODINGFLOODING
Brian Fry, P.E.Brian Fry, P.E.Consultant Project ManagerConsultant Project Manager
Dibble & AssociatesDibble & Associates
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RainfallRainfall
Approximate Rainfall Totals in inches Approximate Rainfall Totals in inches for Rio Verde Areafor Rio Verde Area
FrequencyFrequency 2-year2-year 10-year10-year 100-year100-year
6-hour6-hour 1.6 1.6 2.32.3 3.43.424-hour24-hour 1.91.9 3.03.0 4.64.6
Values based on NOAA AtlasValues based on NOAA Atlas100-year/24 hour National Standard: FEMA, NFIP100-year/24 hour National Standard: FEMA, NFIP
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July 14 RainfallJuly 14 Rainfall(2-yr., 1-hr storm)(2-yr., 1-hr storm)
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Tributary Drainage Tributary Drainage
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Distributary Drainage Distributary Drainage
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Unique Conditions Unique Conditions in Rio Verde Areain Rio Verde Area
Steep SlopesSteep Slopes
Fine-grained SedimentsFine-grained Sediments
Distributary Stream NetworksDistributary Stream Networks
Shallow Sheet FloodingShallow Sheet Flooding
Lateral Erosion & GullyingLateral Erosion & Gullying
Natural Debris Diversions & Flow Natural Debris Diversions & Flow SplitsSplits
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Management ToolsManagement Tools
DEVELOPMENT GUIDELINESDEVELOPMENT GUIDELINESThe intent of the Development Guidelines is to mitigate or The intent of the Development Guidelines is to mitigate or minimize flooding impacts due to urbanization of a minimize flooding impacts due to urbanization of a watershed.watershed.
STRUCTURAL ALTERNATIVESSTRUCTURAL ALTERNATIVESA structural alternative is the construction of flood control A structural alternative is the construction of flood control structures such as dams, concrete channels, levees, etc. structures such as dams, concrete channels, levees, etc. to control flood waters of large rivers / washes.to control flood waters of large rivers / washes.
FLOODPLAIN DELINEATIONSFLOODPLAIN DELINEATIONSFloodplain delineations show the limits and sometimes Floodplain delineations show the limits and sometimes the water surface elevation of areas that are susceptible the water surface elevation of areas that are susceptible to inundation by a base flood / 100-year flood / 1% annual to inundation by a base flood / 100-year flood / 1% annual chance flood.chance flood.
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PUBLIC PUBLIC INVOLVEMENTINVOLVEMENT
Felicia Terry, P.E.Felicia Terry, P.E.Project ManagerProject Manager
Flood Control District of Maricopa CountyFlood Control District of Maricopa County
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Public InvolvementPublic Involvement
3,000 Brochures and Surveys mailed to the 3,000 Brochures and Surveys mailed to the communitycommunity
Public Meetings will be held throughout the projectPublic Meetings will be held throughout the project
Project Website – www.fcd.maricopa.govProject Website – www.fcd.maricopa.gov
Advertising and Articles will continue in local mediaAdvertising and Articles will continue in local media
Work GroupWork Group
Public invited to express ideas and insights. Public invited to express ideas and insights. We invite you to get involved in the problem We invite you to get involved in the problem solving process and to create a community solving process and to create a community based solution.based solution.
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Work Group Members Work Group Members
Shirl AndersonShirl Anderson
Alan BurgessAlan Burgess
Fred FleetFred Fleet
Matt HolmMatt Holm
Richard Hollabaugh Richard Hollabaugh
Gary Lane Gary Lane
Bren Riesinger Bren Riesinger
John Shy John Shy
Bob Thomas Bob Thomas
Susan TroenSusan Troen
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QuestionsQuestions
Felicia Terry, P.E.Felicia Terry, P.E.Project ManagerProject Manager
Flood Control District of Maricopa CountyFlood Control District of Maricopa County