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Section 5 Formulation of Alternative Plans

EAA Storage Reservoirs Revised Draft PIR and EIS February 2006

5-12

within the EAA, south of Lake Okeechobee. Five parcels were identified as

possible locations shown in Figure 1-3. Two adjacent parcels totaling 31,494

acres were identified as Compartment A. Two other adjacent parcels totaling

9,302 acres became Compartment B. The last parcel of 8,884 acres was

identified as Compartment C.

5.3 ALTERNATIVE PLANS

The formulation and evaluation of alternative plans were consistent with the

Draft Program-Wide Guidance Memorandums #1 and #2 regarding the

development of design alternatives to optimize project features, cost-

effectiveness, and satisfaction of the requirements of the CERP Programmatic

Regulations. Different storage configurations, various storage depths, a range of

footprints, and several construction techniques were developed and evaluated.

Additionally, on-site management measures were developed and evaluated to

provide additional ecological benefits.

5.3.1 Evaluation Tools

The modeling tools used in the development, optimization, and evaluation of the

alternatives consisted principally of a regional-scale hydrologic simulation model

(the South Florida Water Management Model) and other modeling tools. These

are described in an earlier section (4.2.1).

5.3.2 Alternative Plans Descriptions

A total number of six alternative plans were considered as part of the plan

optimization process. Alternative 1 is the "No Action" plan, and the remaining 5

plans all have a storage capacity of 360,000 acre-feet. The maximum normal

pool depths for the alternatives are 6 feet, 10 feet, 12 feet, and 14 feet. The

alternatives are similar with the exception of reservoir footprint, embankment

height, and embankment construction method. Four alternatives are designed

with earthen fill embankments and 1 alternative was designed using roller

compacted concrete (RCC) embankment construction. RCC construction was

evaluated as a possible cost-saving construction method during a value

engineering exercise after the initial construction and cost estimates of the

earthen embankment plans. The RCC design and planning cost estimate was

developed for the 12-foot storage depth alternative, as this depth and

configuration was indicated as the most cost-effective plan.

All of the “action” alternatives include inflow pump stations (using existing and

new pump stations), gated discharge spillways to North New River and Miami

Canals and STA-3/4, an internal embankment and internal gated spillway(s) for

cell stage equalization, and seepage control canals with associated structures.

Table 5-2 provides a summary of reservoir alternatives.

1 2 ... 161 162 163 164 165 166 167 168 169 170 171 ... 385 386

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