Everglades agricultural area storage reservoir a 1 30 earthworks design phase
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Everglades Agricultural Area Storage Reservoir A-1 30% Earthworks Design Phase. WRAC April 6, 2006 Shawn Waldeck, P.E. Acceler8 Project Manager. Project Purpose. EAA Reservoir A-1 is an important part of the Comprehensive Everglades Restoration Plan (CERP). As part of CERP it will:.

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Everglades Agricultural Area Storage Reservoir A-1 30% Earthworks Design Phase

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Everglades agricultural area storage reservoir a 1 30 earthworks design phase

Everglades Agricultural AreaStorage Reservoir A-130% Earthworks Design Phase

WRAC

April 6, 2006

Shawn Waldeck, P.E.

Acceler8 Project Manager


Project purpose

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


Project purpose1

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

  • Ancillary improvement in flood protection in EAA

A-1


Everglades agricultural area storage reservoir a 1 30 earthworks design phase

US Highway 27

Future

A-2

Reservoir

Miami Canal

North New River Canal

Proposed

A-1

Reservoir

Pump Station

G-372

Supply Canal

Holey Land

Wildlife Management

Area

Pump Station

G-370

STA-3/4


Overall plan

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


Everglades agricultural area storage reservoir a 1 30 earthworks design phase

S T R I P P I N G

Stripping berm

Seepage canal

Borrow canal

Cut-off wall


Advantages of roller compacted concrete rcc

Downstream slope maintenance generally not required if defect free.

Risk of piping in dam eliminated.

Minor overtopping may be acceptable without damage.

Avoids the need to use moisture sensitive Fort Thompson Formation material

Occupies less area than an embankment, so EAA Reservoir A‑1 storage can be maximized.

Advantages of Roller Compacted Concrete RCC


Disadvantages of roller compacted concrete rcc

Higher cost

Supply risk because a large volume of cement must be imported.

Special foundation treatment required where caprock thin or absent

Predicting the magnitude of cracking and control of crack location with certainty is difficult due to the variable foundation conditions. Seepage is expected to occur through cracks.

Foundation preparation by air/water blasting

Settlement of the cutoff must be compatible with the rigidity of the RCC structure.

Temperature control of the RCC components difficult in hot temperatures.

Moisture control in stockpiled aggregates difficult during wet season.

An RCC structure does not fit aesthetically with the surroundings.

Vertical upstream face creates a safety hazard; means for escape required

Disadvantages of Roller Compacted Concrete RCC


Design safety

Design Safety

  • Dam Design Criteria – DCM (Design Criteria Memorandum) coordination

  • Superiority

  • Stability

  • Regular Inspections/Monitoring


Potential recreational opportunities

Potential Recreational Opportunities


Project assurance requirements

Project Assurance Requirements

WRDA (Water Resources Development Act) 2000 and Florida Statute requirements addressed:

  • Identify water for the natural system

  • Identify water for other water-related needs

  • Confirm quantify water available to existing legal users has not been diminished

  • Determine that existing levels of service for flood protection will not be diminished outside geographic area of the project


Documentation of project assurances

Documentation of Project Assurances

  • Documentation of Project Assurances for A8 Reservoir will be included in the Preliminary Design Documents (30% Design for both the earthworks and pump station phases)

  • Acceler8 system wide benefits, ascribable to the EAA Project, will be identified in the Final Supplemental Environmental Impact Statement (SEIS)

  • Corps Project Implementation Report (PIR) documents project assurances for Compartment A in its entirety


Surface water flood protection

Surface Water Flood Protection

  • Inherent flood protection due to reservoir

  • Additional capacity created in the existing canal system

  • Additional pumping station(s) in system


Seepage controls

Seepage Controls


Permitting environmental

Permitting/Environmental

  • 1502 Water Quality Certificate

  • USACE 404

  • 1501 Assurances

  • Environmental Site Assessment and Clean Up

  • Protected Species

    • Manatee

    • Florida Panther

    • Wading Birds

    • Other

  • Environmental Enhancements

  • Construction Permits

  • Air/Noise


Stakeholder presentations

Stakeholder Presentations

  • Agricultural

  • Environmental

  • 298 Districts

  • Belle Glade

  • Pahokee

  • South Bay

  • Palm Beach County

  • Tribes

  • FPL/FDOT

  • Recreational

  • WRAC Issues Workshop

  • Full WRAC


Stakeholder comments

Stakeholder Comments

  • Safety

  • Flood Protection

  • Local Economic Development

  • Recreational Use(s)

  • Assurances

  • Consider other “less – engineered” alternatives

  • Wetland impact and mitigation

  • Holey Land seepage


Degradation in the eaa

Degradation in the EAA

HISTORICAL

Lake

Okeechobee

Sheetflow over the sawgrass plains to the Everglades

PRESENT

EAA

Lake

Okeechobee

S7

Loss of muck in the EAA through subsidence, compaction, and oxidation


Schedule for eaa reservoir a 1

2005

Schedule for EAA Reservoir A-1

2006

2007

2008

2009

Design

Construction


Cost summary

Cost Summary


Base cost from yellow book

Base Cost from Yellow Book

Embankment

Pump Station

Control Structures

U.S. 27 Bridges

Subtotal Structures

Total Yellow Book

Prorated to 190,000 AF

$M

437

243.3

Costs adjusted to 2006

A-1 (acres)

Total A (acres)

364

16,700

30,000


Base cost from bodr for eaa reservoir a 1

Base Cost from BODR for EAA Reservoir A-1

Embankment

Pump Station

Control Structures

U.S. 27 Bridges

Subtotal Structures

Total BODR

Costs adjusted to 2006

310.4

70.4

14.6

5.3

90.3

400.7

412.7

  • Added cutoff wall

  • Increase water depth to 12 feet

  • Modified pump station and added pump station


Preliminary design report

Preliminary Design Report

Embankment

Structures

Total PDR

Costs adjusted to 2006

349.7

90.3

440.0

440.0

  • Added concrete to slurry wall

  • Added mechanical mixing of slurry wall

  • Embankment volume increased


Discussion

Discussion


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