WRAC Issues Workshop

EAA/STA-2 Expansion Cell 4

April 11, 2005

Acceler8 Overview

Everglades Restoration Accelerated Projects

• C-43 (Caloosahatchee River) West Reservoir

• EAA Reservoir Phase I/Boles & Cross Canals

• EAA Stormwater Treatment Area Expansion

• Picayune Strand (Southern Golden Gate Estates) Restoration

• C-44 (St. Lucie Canal) Reservoir / STA

• Water Preserve Areas

• Biscayne Bay Coastal Wetlands Phase I

• C-111 Spreader Canal

ACCELER8 Achieves Restoration Goals Faster

• Reduces excess stormwater deliveries to estuaries

• Provides over half of planned CERP surface water storage

• Earlier improvements to water quality

• Provides greater flood control and water supply management flexibility

• Focuses on CERP projects with Project Implementation Reports (PIR) in progress

• Provides greater opportunities for improved timing / hydropatterns to the natural system

EAA/STA-2 Expansion Cell 4

Overview

• COMPARTMENT B- 9,500 ACRES- PALM BEACH COUNTY

• COMPARTMENT C-8,800 ACRES-HENDRY COUNTY

EAA STA – COMPARTMENT B

• INITIAL EXPANSION– STA-2 CELL 4

• BUILD-OUT AREAS– NORTH

– SOUTH

North

South

EAA/STA-2 Cell 4 PROJECT PURPOSE & BENEFITS

• Further improve water quality entering the

Everglades Protection Area

• Develop design/construction sequence to be

“flow capable” December 2006

• Provide operational flexibility

• Provide public access opportunities

Purpose of BODR is to provide a platform for consolidation of design concepts that may be presented for technical and stakeholder review with the goal of obtaining comment and ultimate buy-in on the proposed design concept.

Key elements of the EAA/STA-2 Cell 4 BODR include:

BASIS OF DESIGN REPORT SUMMARY

• Site Investigations

• Design Criteria Development

• Hydrologic and Hydraulic Analysis

• Project Layout & Evaluation of Alternatives

• Conceptual Project Features Design

• Develop Opinion of Probable Cost

• Supporting Engineering Analysis

EAA/STA-2 Cell 4 DESIGN FEATURES

• 2,015 acre expansion to STA-2– Approximately 2.3 miles wide and 2 miles long

• Submerged Aquatic Vegetation (SAV)– Average water depth 1.25’ to 1.5’– Operating range 0.5’ to 4.5’

EAA/STA-2 Cell 4 Design Features

• Optimize the use of existing facilities:– Utilize existing STA-2

inflow infrastructure

– Utilize existing STA-2 discharge infrastructure

– Modify existing structure G-337A

EAA/STA-2 Cell 4 DESIGN FEATURES

• Utilize “Lessons Learned” from previous STA construction:– Degrade existing features – fish farm & PSTA

cells– Fill ditches running parallel to flow (north to south)– Degrade farm roads running perpendicular to flow

(east to west)– Perform preliminary site preparation work to

facilitate inundation of interior cell to promote vegetation growth during construction.

• Canal corridor between Cells 3 and 4• 6 gated inflow control structures (66” RCP)

with telemetry and remote operation capabilities

• 1 outlet control structure will have telemetry and remote operation capabilities.

EAA/STA-2 Cell 4 DESIGN FEATURES

EAA/STA-2 Cell 4 IMPLEMENTATION TIMELINE

• Preliminary Site Survey & Mapping Complete

• Geotechnical Investigation and Mid-2005 Analysis Report

• Basis of Design Report April 2005

• Comments Received April 2005

• Preliminary Engineering June 2005

• Intermediate Status Submittal July 2005

• Final Plans & Specifications Oct 2005

• Construction Start Jan 2006

• Cell 4 Flow Capable Dec 2006

Discussion