Everglades Agricultural Area Storage Reservoir A1 Basis of Design Report BODR

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Everglades Agricultural AreaStorage Reservoir
A-1Basis of Design Report (BODR)

• November 2005
• Shawn Waldeck, P.E.
• Acceler8 Project Manager

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Agenda

• CERP/Acceler8 overview
• Project purpose
• SFWMM (2 x 2 model)
• Project overview
• Test cell program
• Seepage
• Recreational opportunities
• Outreach/Stakeholder feedback
• Project assurances

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Comprehensive Everglades Restoration Plan (CERP)
Restoring the Everglades Flow Pattern
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Getting the Water Right
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Acceler8 Overview
EAA Reservoir A-1 (BODR stage)
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Project Purpose

• EAA Reservoir A-1 is an important part of the
  Comprehensive Everglades Restoration Plan (CERP).
  As part of CERP it will

• Allow SFWMD to better manage water to the
  environment
• Allow SFWMD to manage water deliveries to
  agricultural community

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Project Purpose

• Capture, store, and make use of EAA Basin runoff
  and releases from Lake Okeechobee
• Reduce Lake Okeechobee regulatory releases to the
  estuaries
• Restoration of Everglades hydropatterns
• Balancing inflow into STA-3/4
• Preserve existing agricultural water uses
• Incidental improvement in flood protection in EAA

A-1
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SFWMM (2 x 2 Model)

• SFWMM is a regional hydrologic simulation model
  covering Lake Okeechobee, LOSA, EAA, Everglades,
  LEC
• SFWMM has been used by SFWMD to assess the
  benefits of CERP
• SFWMM establishes boundary flow for the detailed
  water balance model
• ECP 2006, 2010 and 2015

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Overall Plan
Connector Canal

• 190,000 ac-ft of storage
• Seepage canals
• New pump station from North New River Canal
• Gated discharge structures
• STA-3/4 Supply Canal

Northeast Pump Station
North New River Canal
Gate Structure
Seepage Canal
EAA Reservoir A-1
Embankment
Internal Borrow Canal
From G-372 Pump Station
Gate Structures
G-370 Pump Station
G-383
STA-3/4 Supply Canal
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Reservoir Site Today
STA-3/4
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Reservoir Site Construction Completed 2009
EAA Reservoir A-1
STA-3/4
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Typical Embankment Cross-Section
EAA Reservoir A-1
Embankment
Seepage Canal
Caprock
Cutoff Wall
Internal Borrow Canal
Ft. Thompson Formation
Caloosahatchee Formation
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Operation

• Water Sources
• Agricultural runoff from North New River Canal
  (NNRC) and Miami Canal drainage basins
• Lake Okeechobee regulatory releases
• Direct precipitation
• Pump into reservoir during excess flow periods
• Release of water at the appropriate time to
• Environment
• Agriculture

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Average Annual Inflows (ac-ft)
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Average Annual Outflows (ac-ft)
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Stage Duration Curves for EAA Reservoir A-1
(Preferred Alternative)
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EAA Reservoir Operation During an Average Water
Year
October 1, 1991 to September 30, 1992
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Water for the Natural System

• Based on the water balance model
• Base year deliveries are based on flood control
• Annual delivery to Water Conservation Areas
  ranges from 104,000 to 1,487,000 ac-ft over
  36-year period of record
• Average annual delivery is 685,000 ac-ft
• Improved wet year performance
• There will be more detailed quantification and
  evaluation during the design stage for Project
  Assurances
• Preliminary modeling shows increased quantity and
  availability of water

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Average Annual Environmental Deliveries met by
EAA A-1 during POS(No explicit delivery in base
year)
900
270
227
685
700
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Mean Annual Volume (Kac-ft/yr)
500
150
Percentage Met
100
300
90
76
100
30
2010
2010
2015
Year
Year
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Water for Other Needs

• Based on the water balance model
• Annual delivery ranges from 18,900 to 160,000
  ac-ft over 36-year period of simulation
• Average annual delivery of 84,000 ac-ft for
  agriculture with EAA reservoir
• Dry year delivery is 74,450 ac-ft
• Improved dry year performance over base year
• Preliminary modeling shows improvement by
  significant reduction in use restrictions
• More detailed quantification and evaluation
  during design stage for Project Assurances

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Average Annual Agricultural Deliveries met by EAA
A-1 during POS
2006 (Base Year)
180
138
140
100
90
Mean Annual Volume (Kac-ft/yr)
60
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MC
NNRC
Met by Lake Okeechobee
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Average Annual Agricultural Deliveries met by EAA
A-1 during POS
2010
2010
180
90
140
70
129
Mean Annual Volume (Kac-ft/yr)
100
50
92
Percentage Met by reservoir
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85
60
30
20
10
MC
NNRC
Met by Lake Okeechobee
Met by EAA Reservoir A-1
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Water Quality

• Category B not expected to cause or contribute
  to WQ degradation
• DMSTA2 Phosphorus concentration reduction of
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• Test cell data to be developed in Acceler8
  program
• Detailed evaluation included in the PIR

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Embankment Design
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Freeboard Requirements
Design Pool Depth
Wind
Wave Run-up
Storm Surge
Waves Form
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Design Storms

• High Hazard facility therefore stringent design
  standards apply
• 100-year wind with maximum rainfall
• 100-year adjusted wind 104 mph
• Maximum rainfall 54 inches in 3 days
• 500-year rainfall 20 inches in 3 days
• Category 5 hurricane
• Adjusted wind speed 122 mph
• 100-year rainfall 17 inches in 3 days
• Probable maximum wind
• 200 mph is PMW (gust)
• Adjusted wind speed 158 mph
• These follow design criteria developed jointly
  by USACE, SFWMD, FDEP

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Test Cells
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Test Cell Program

• Obtain performance data
• Soil properties used for modeling seepage
• Total seepage from reservoir
• Seepage lost
• Evaluate material suitability for
• Embankment construction
• Rock processing
• Evaluate different construction procedures
• Develop cost effective techniques for handling on
  site materials

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Test Cell 1
MAKE-UP

• c

RE-CIRCULATE
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Test Cell 2
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Cap Rock
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Subsurface Conditions - Stratigraphy
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Seepage Model

• Developed using USGSs MODFLOW model
• 8 aquifer layers to 220 feet below ground
• Model covers area 32 miles by 23 miles
• Calibrated aquifer parameters to test cell data
• Model used to evaluate seepage, seepage
  collection, and potential flows to surrounding
  areas (farmlands, STAs, Holey Land)

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Areas Potentially Affected by Seepage
U.S. 27
Agricultural Area
Agricultural Area
NNRC
EAA Reservoir A1
Compartment B
Holey Land Wildlife Management Area
STA-3/4 Supply Canal
STA-3/4
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Typical Cross-Section
Network of Farm Canals
EAA Reservoir A-1
Caprock
Seepage Canal
Cutoff Wall
Ft. Thompson Formation
Caloosahatchee Formation
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Seepage Control Alternatives Considered

• Cutoff wall (34-feet deep) completely around
  reservoir
• Cutoff wall (34-feet deep) along farmland and
  shorter cutoff wall along Holey Land WCA and
  STA-3/4
• Deep pressure-relief wells along farmland

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Seepage Controls
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US 27 no effect
US 27
North New River Canal
Seepage Canal
Cutoff Wall
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Potential Recreational Opportunities
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Schedule for EAA Reservoir A-1
2006
2007
2008
2009
Design
Construction
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Cost Summary
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Outreach

• Job training benefits
• 1.5 billion construction program
• Removal of land from production/tax roles
• Jobs for local residents
• Training provided
• Training
• Heavy equipment
• Construction craft worker

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Outreach

• Business involvement benefits
• Emphasis on partnerships linking resources
• Construction symposiums and exhibitions
• Contract opportunity assistance
• Construction symposiums
• Large events primes, subs, support,
  workforce and exhibitors
• Smaller-scale events subs, small businesses
  and support services

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Stakeholder Presentations

• Agricultural
• Environmental
• 298 Districts
• Belle Glade
• Pahokee
• South Bay
• Palm Beach Co
• Seminole Tribe
• FPL
• FDOT

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Issues Identified at Stakeholder Meetings

• A-1 Project Assurances
• PIR and BODR coordination
• Complete planning before construction
• Expand Schedule
• Base year vs. post reservoir condition
• Water quality
• Consider STAs in lieu of storage
• Health and safety of residents in Tri-Cities area
• Local business opportunities and jobs
• Mosquito control
• Maintain legal right to water supply

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Project Assurance Requirements

• WRDA 2000 and Florida Programmatic requirements
• Identify water for the natural system
• Identify water for other water-related needs
• Address any elimination or transfers of water
• Maintain existing level of flood protection

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Model Scenarios for Comparison

• Existing PIR Baseline - Current system
  configuration with current allocated demands
• Existing PIR Baseline with Project Current
  system configuration plus EAA Reservoir with
  current allocated demands
• Natural System Targets - Restoration targets as
  defined by RECOVER or mutually acceptable by
  SFWMD, USACE, and Department of Interior

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Water Made Available By Project

• EAA Reservoir is expected to have system-wide
  effects
• System-wide quantification performed for three
  conditions
• Annual (water year from November - October)
• Dry Season (November - May)
• Wet Season (June - October)

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Water Made Available By Project

• Identify water made available by a project
• Water for the natural system
• Water for other water-related needs
• Compare model scenarios to Natural System Targets
• Existing PIR Baseline
• Existing PIR Baseline with Project
• Modeling tool SFWMM

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Elimination or Transfer of Water

• Identify any transfer of source that may occur
• Show that there are no adverse impacts from
  project to existing legal users
• Compare model scenarios
• Existing PIR Baseline
• Existing PIR Baseline with Project
• Modeling tool - SFWMM

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Maintaining Existing Levels of Flood Protection

• Determine if existing levels of service for flood
  protection will be diminished outside geographic
  area of the project
• Show that there are no adverse impacts from
  project
• Compare model conditions
• Existing PIR Baseline
• Existing PIR Baseline with Project
• Modeling tool - Local scale modeling

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Elimination or Transfer of Water

• Based on modeled operation of EAA Reservoir A-1
• Increased quantity and timing of water for
  protection of fish and wildlife
• Improved timing of delivery of water for
  agriculture
• Water supply from the reservoir supplemented by
  Lake Okeechobee
• No impact to existing users

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Maintaining Existing Levels of Flood Protection

• Control seepage from EAA Reservoir A-1 away from
  adjacent lands
• Optimized EAA Reservoir A-1 operations includes
  pump station, seepage canal and cutoff walls
• Inherent improvements to regional flood protection

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Documentation of Project Assurances

• Documentation of Project Assurances for A8
  Reservoir will be included in the Preliminary
  Design Documents

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Goals and Objectives Met

• Improved quantity, quality and timingof releases
  to environment
• Flow equalization to STAs
• Some reduction of back pumping events
• Some reduction of Lake Okeechobee releases to
  estuaries

• Regional water supply maintained
• Incidental flood control improvement
• Recreation opportunities