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Section 5 Formulation of Alternative Plans

EAA Storage Reservoirs Revised Draft PIR and EIS February 2006

5-69

5.6.2 St. Lucie Estuary NAI Performance

Lake Okeechobee Regulatory releases (LORR) were the only RECOVER

performance measure that demonstrated a significant change with project

implementation for the St. Lucie Estuary (Table 5-26). On a next-added

incremental basis, the project will contribute 259 AAHUs to the St. Lucie

Estuary be reducing regulatory releases.

TABLE 5-26: HABITAT UNITS FOR ST. LUCIE ESTUARY FOR PERFORMANCE

MEASURE OF REDUCTION IN LAKE OKEECHOBEE REGULATORY

RELEASES (LORR) FROM THE MODELING PERIOD OF RECORD.

St. Lucie Estuary HUs 2000B3 2050B3 NAI-S5a

LORR PM 9 18 277

5.6.3 Caloosahatchee NAI Performance

For the Caloosahatchee Estuary, at low flow rates (<300 cfs) and at optimal flow

rates (300-1500 cfs) the NAI-S5A alternative performs slightly worse than the

2050B3 (Table 5-27) (186 events compared to 167 events, and 113 events

compared to 125 events, respectively). This slight decline in performance is

expected, since Lake Okeechobee discharges will be stored in the reservoir

instead of the C-43 Canal and basin. Furthermore, as a result of further study

in the basin (notably, the Caloosahatchee Water Management Plan) there has

been a reduction in the volume of runoff from the C-43 basin originally thought

to be available for capture, storage, and delivery to meet environmental targets

in the Caloosahatchee Estuary. This reduction is not a function of EAA project

implementation. Without a significant modification to proposed project

operations, the reservoir can not be operated to provide an additional source of

water to meet salinity targets in the Caloosahatchee Estuary.

TABLE 5-27: CATEGORIZED DATA FOR THE CALOOSAHATCHEE ESTUARY

PERFORMANCE MEASURE.

2000B3 2050B3 NAI-S5a

<300 cfs 177 167 186

300-500 30 41 30

500-800 28 30 34

800-1500 50 54 49

1500-2800 65 57 64

2800-4500 45 45 40

>4500 37 38 29

1 2 ... 218 219 220 221 222 223 224 225 226 227 228 ... 385 386

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