2801 West Durango Street Phoenix, Arizona 85009 Contact: Kristine Rabe Phone: 602-506-4708

AGENDA January 10, 2019

Flood Control District of Maricopa County

PRESENTERS:

Michael Fulton Director

Kelli Sertich, AICP, CFM Policy, Planning and Coordination

Branch Manager

Stephanie Gerlach, P.E. Special Projects Branch Manager

Felicia Terry, P.E., CFM Hydrology and Hydraulics Branch

Manager

Don Rerick, P.E. Planning and Project Management

Division Manager

~2019~

MEETING SCHEDULE

January 10

April 11

July 11

October 23

The Flood Stakeholder Group will meet

quarterly unless otherwise indicated.

Flood Stakeholder Group

Adobe Conference Room

2:00 – 3:30 pm

1. Welcome and Comments (Michael Fulton)

2. Guidance Document Update (Kelli Sertich and

Stephanie Gerlach) – link to view Drainage documents -

https://www.maricopa.gov/4324/Download:

Drainage Design Manual, Hydrology

Drainage Design Manual, Hydraulics

Drainage Design Manual, Erosion Control

Drainage Policies and Standards Manual

3. Delineation Studies Status (Felicia Terry)

4. Project Updates PPT(Don Rerick) –

27th Ave. & Olney

Hidden Valley Basins

Rawhide Wash

McMicken Outfall Channel and McMicken Dam

115th & Union Hills

Middle Indian Bend Wash

Buckeye FRS#1

Granite Reef

WTFRS#4 Outlet SD

San Tan ADMS Update

Cave Buttes

Vineyard and Powerline

Rawhide Wash “West”

5. SPAP Review (Michael Fulton)

6. Round Table (All)

January 10, 2019

Flood Stakeholder Group

Agenda

• Welcome and Comments (Michael Fulton)

• Guidance Document Update (Kelli Sertich and Stephanie Gerlach)

• Delineation Studies Status (Felicia Terry)

• Project Updates (Don Rerick)

• SPAP Program Review (Michael Fulton)

• Round Table (All)

Welcomeand

Comments

Michael FultonDirector

Welcome

• Angie Flick,

Chief Administrator

• Hasan Mushtaq,

Planning Branch Manager

Welcome

• Ellen Heller, Outreach Coordination Liaison

• Kristine Rabe,

Assistant to the Director’s Office

• Ruthie Redmond,

Water Resource Specialist

Farewell

• Chris Hall, Deputy Director

• Doug Williams, Planning Branch Manager

• Kaylee Colter, Landscape Designer/Planner

• Patti Thoemke, Executive Assistant to Director

• Fritz Huber, Construction Management Branch Manager

Kelli A. Sertich, AICP, CFM

Policy, Planning and Coordination Branch Manager

Drainage Policies and Standards Manual Update

Background

• In 2006, the FCD developed DP & SM in partnership with county agencies and some cities/towns.

• Provides consistent guidance and detail on implementation of the Floodplain Regulations for Maricopa County and the Maricopa County Drainage Provisions.

Background

• Updated six times since adoption in 2007.Resolution adopting 2007 document rescinded.

DP & SM is a guidance document, not a rule.

• Received a request for revisions from Maricopa County Department of Transportation – triggering update.

Process for Updates

• Multi-disciplinary committee of county agencies and cities.

• Changes submitted to FCD and routed to committee.

• Review and meet to discuss, make additional changes, concur on draft language.

• Draft update sent out to county agencies and all cities/towns.

Key Revisions – 6th Edition

Chapters 1 and 2

• Added current FCD Mission Statement.

• Removed WOTUS definition.

• Added a number of statements encouraging groundwater recharge, nature based solutions, multi-purpose strategies.

• Added a section for pervious concrete per MAG Standards.

Key Revisions

Chapters 3 and 4

• Revised 3.7.1 FEMA to match the Code of Federal Regulations.

• Added text “integrated drainage design, utilizing natural drainages and…”

• Expanded on info for use of the Flood Insurance Rate Maps (FIRM).

Key Revisions

Chapter 6

• Added new section for Utility Profiles – interface ofutilities with drainage infrastructure.

• References to software updated.

• Standard 6.7.14 – text added: “For supercritical flows, see Standard 6.7.17 for additional freeboard requirements.”

• Standard 6.9.2 – text added: “A clogging factor of 100% shall be used in the structural analysis of all trash racks.”

Key Revisions

Chapter 8

• Revision Process – revised to reflect change ofprocedure from adoption by the Board of Directors tobeing a best practices Substantive Policy Statement,addition of communities to committee and routingprocess.

• General ItemsMinor updates and formatting changes throughout.

DP & SM

Latest edition located at:

FCD website under Downloads –

https://www.maricopa.gov/184/I-Want-to

Enhanced Regulatory Outreach website –

https://www.maricopa.gov/2784/Substantive-Policy-Statements

The detail of the changes are included in the back of the document.

Questions?

Stephanie Gerlach, P.E.

Special Projects Branch Manager

Drainage Design Manual Update

Hydrology, Hydraulics and Erosion Manuals

Background

• In 1985, the FCD formed a multi-jurisdictional taskforce to develop the Drainage Design Manual.

• Provides advice and information regarding FCDMC’scurrent approach or opinion to the requirements ofthe various federal, state and county floodplain anddrainage related ordinances and regulations.

Background

Process for Updates

• New studies were completed.

• FCD received a request for revisions.

• The draft manual was reviewed by FCD staff.

• Draft update sent to county agencies and all cities/towns for review.

Volume I – Hydrology Updates

• Includes an additional 24 years of data.

• Updated statistical procedures.

• New analytical tools.

• New USGS StreamStatswebpage.

Volume II – Hydraulics Update

• 22 studies and other resources were used.

• New guidance on:

Pier scour

Debris loading

Abutment scour

Volume III – ErosionControl Updates

• Added a hardened surface where traffic will be entering or exiting a construction site.

Drainage Design Manual

Latest edition located at:

FCD website under Downloads –

https://www.maricopa.gov/4324/Download

The detail of the changes are included in the back of each document.

Questions?

Felicia Terry, P.E., CFMHydrology & Hydraulics Branch Manager

Floodplain Delineation Program

Update

Status of Studies

• Physical Map Revisions (PMRs)

• At FEMA for review

• On-going Studies

Physical Map Revisions (PMR)(No confirmed dates)

• Wickenburg area / Centennial Wash• Levee PMR• Lower Gila River FDS• Fans 5 & 6 (North Phoenix / Scottsdale)

Wickenburg/Centennial PMR

Levee PMR

Lower Gila River FDS

Fans 5 & 6 Floodplain Delineation

Studies at FEMA for Review

• Palo Verde West Area FDS

• Vekol Hydrology Study CLOMR

• Ashbrook/Cloudburst FDS

• New River Hydrology/Re-delineation

Palo Verde Area –WestDetailed Study

Vekol Wash

HydrologyCLOMR(235 sq. mi)

Ashbrook and Cloudburst WashesFDS

Ashbrook Wash

Cloudburst Wash

New River Hydrology /

Floodplain Re-Delineation

1.5 Miles

On-going Studies

Lower Gila River Overflow Area Floodplain Delineation Study

Fountain Channel

FEMA X (Shaded)

FEMA AN S

AG

UA

RO

BLV

D

E PALISADES BLVD

E El Lago Blvd

N L

a M

onta

na D

r

E Teal Dr

E Gunsight Dr

E Tioga Dr

E Parkview Ave

E K

iwan

is D

r

N Te

al D

r

N V

ista

Del Lago

N V

ia D

el S

ol

E Colony Dr

N S

aguaro Blvd

E V

ia D

el O

ro

E Enterprise Dr

N Arroya Vista Dr

E Sunscape Dr

N L

am

ont D

rN C

olony Dr

N F

alco

n D

rN

Tow

er D

r

N G

ambe

l Dr

UN

NA

M

ED

STRE

AMCOLONY WASH

Fountain Channel

Hassayampa River

Su

n V

all

ey

Pk

wy

§̈¦10

§̈¦10

W O

LD US 8

0

S J

OH

NS

ON

RD

S 3

39

TH

AV

E

W BASELINE RD

W SALOME HW

Y

W TONOPAH SALOME HWY

N 3

39

TH

AV

E

W YUMA RD

S 3

31

ST

AV

E

W DOBBINS RD

S B

RU

NE

R R

D

S 3

09

TH

AV

E

S 3

31

ST

AV

E

S B

RU

NE

R R

D

• Re-studying approximately 14.5 miles of floodplain due to updated discharges by USGS.

• From Jackrabbit Wash to Gila River.

Questions?

Don Rerick, P.E.

Planning and Project Management Division Manager

Project Updates

PlanningMiddle Indian Bend Wash Area Drainage Master Study

• Consultant is preparing the final FLO-2D models for review by the District.

• Upon completion of the FLO-2D models the final ADMS Report will be issued which will identify potential flooding areas that could lead to possible flood mitigation solutions.

• Coordination with Phoenix and Paradise Valley is on-going.

• The study target completion is spring 2019.

• DCR efforts have been completed. During this effort three public meetings were held.

• The ADMP will identify alternative solutions to mitigate some of the flooding hazards.

• New mapping of the watershed and updating of the Data Collection Report will occur.

• ADMP will be completed within 24 months after NTP in early 2019.

San Tan Area Drainage Master Plan

Planning

PlanningHidden Valley Basins Acquisition

• Advance acquisition of two basin sites for the project is necessary before the sites are developed.

• Geotechnical and environmental investigations of the sites began in December.

• An in-house 30% design to refine the rights-of-way needs for the basins has been done and is the basis for the acquisition.

• The acquisition process has begun, and could require up to 12 months to complete.

PlanningRawhide Wash Channelization DCR

• An alternatives analysis to be developed with the goal of reducing the extent of the flood hazard and floodplain west of Scottsdale Road.

• Tasks will include data collection, alternatives analysis, cost estimates and a recommended alternative.

• Coordination with Phoenix and ASLD.

• Completion of the DCR is anticipated in summer 2019.

Design27th Ave. and Olney Ave. Storm Drain & Basin Project

• IGA with City of Phoenix was approved by BOD on September 19, 2018.

• Design effort will be in two phases:

Work Assignment 1: 23rd Ave Basins

• NTP December 12, 2018

Work Assignment 2: Storm Drain

• NTP in February 2019

• The city has acquired two of three basin sites, with third basin acquisition underway.

• City will be lead for basin construction.

Target is to begin construction before start of 2019 monsoon season.

DesignRawhide Wash Flood Hazard Mitigation

• The project will consist of a conveyance alternative, improving existing floodwalls and levees along the wash with added features at Happy Valley Road, all to contain 100-year flood flows.

• Project partners are Phoenix and Scottsdale. Coordination with ASLD.

• A project Resolution was adopted by the BOD in April 2018, and a design IGA will go to the BOD in January 2019.

• A consultant has been selected for design, and the contract will go to the BOD in January 2019, with a NTP scheduled soon thereafter.

Rawhide Wash Flood Hazard Mitigation

DesignMcMicken Dam Rehabilitation

• Design of Phases 1 and 2 continues.

• Phase 1 new emergency spillway and principal outlet: construction start anticipated in August 2019.

• Continue working with Maricopa Water District for siphon crossing design and Beardsley Canal segment relocation.

• The Outlet Channel In-House design is at 90%; final P&S in spring 2019.

• Phase 1 of channel excavation will be bid in FY19. The contract will include disposal of some excavation material at an existing nearby MCDOT pit. An IGA is being developed for this purpose.

• Dirt broker has until April 2019 to remove 500,000 cy of channel material.

DesignGranite Reef Watershed Project

• City of Scottsdale is the lead agency.

• Phase 1A and Phase 1B-1 construction has been completed by the city.

• Design of Phase 1B-2 continues.

• Phase 1B-2 construction start anticipated in spring 2019.

• Future Phase 2 south of Indian School Road to Salt River remains at a conceptual design stage.

White Tanks FRS#4 – Principal Outlet Storm Drain

• Updating of project P&S has been completed.

• Utility conflict relocations are on-going; anticipated to be complete in January.

• Advertise for construction in January, with NTP in March 2019.

• This is a unilateral FCD project and 100% FCD funded.

Design

Construction115th Avenue & Union Hills Drive Drainage Improvements

• Construction of Phase 1 and Phase 2 has been completed.

• O&M will be provided by each project partner in their respective jurisdictions; Peoria, Surprise, and District in Unincorporated County.

• District is working with Peoria and Surprise to identify a possible start date for design of Phase 3.

ConstructionDurango Regional Conveyance Channel - 75th to 107th Ave.

• Construction NTP was given July 9. Construction duration is fifteen months.

• Contractor is excavating the 107th Avenue basin and working on multiple box culvert structures.

• The project is a partnership with the City of Phoenix who will own, operate and maintain the completed project.

Durango Regional Conveyance Channel - 75th to 107th Ave.

Construction Manager at Risk (CMAR)Cave Buttes Dam Modification Project – Auxiliary Outlet Tunnel

• CMAR Contractor – Coffman/SSC JV Pre-Construction Phase In-Progress

• Design by – AECOM (formerly URS)

Design on-going (currently at 90%)

• USACE Section 408 Permit Required

MOA to Expedite USACE Review

• Construction Start - FY20

• Estimated Construction Cost - $10M

• 100% FCDMC Funded

Construction Manager at Risk (CMAR)

Vineyard Road & Powerline FRS Rehabilitation

Vineyard

• Phase 1 Completed - Dam embankment materials; processing, testing and stockpiling.

• Design continues for Phases 2 & 3; presently at 90% and moving to 100%.

• Phase 2 will be ready for construction in April 2020 pending funding availability, and NRCS approval for phasing.

Powerline Channel

• Design of the channel and decommissioning of the dam continues. Presently at 90% and moving to 100%.

Vineyard Road & Powerline FRS Rehabilitation

Construction Manager at Risk (CMAR)

Buckeye FRS No. 1 Rehabilitation Project

• Phase 2B design continues.

• Phase 2B is final construction phase. Construction start is anticipated in October 2019.

• A new IGA with NRCS will be required for funding needed to complete Phase 2B.

• FCD will work with NRCS to develop a new IGA using newly adopted NRCS guidelines.

115th Ave. & Union Hills Project

T/R View – Looking south toward the AFR at the completed trapezoidal Channel.

L/L View – South of Bell Rd. looking north at the completed rectangular channel.

QUESTIONS?

Small Project Assistance Program (SPAP) Review

• FCD has assisted with funding 64 small projects in communities throughout Maricopa County since 2011.

• SPAP funding restricted to $250,000 or 75% of project construction costs, whichever is less.

• Survey sent to partner communities for feedback on program – strengths and opportunities for improvement (response requested by Jan. 31).

Round Table

• Share information of interest to the FSG.

• Comments/suggestions regarding FCD programs/practices?

• Future meeting topics?

Thank you for coming!

The next FSG meeting is April 11, 2019, at 2 PM in the Adobe Conference Room

at the Flood Control District.