16


 Three alternative reservoir sizes with storage capacities of 240,000, 360,000, and

480,000 acre-feet were evaluated in the early stages of Component A analysis, referred to

as the original Alternative 1, the original Alternative 3, and the original Alternative 5,

respectively (USACE and SFWMD, electronic correspondence, February 14, 2005,

March 1, 2005, March 8, 2005, and April 5, 2005). The original alternatives were

divided into two compartments of the same nominal depth. In the original alternatives,

the first compartment, called C1, was configured to provide 90,000 acre-feet of storage

for agricultural use. The second compartment, C2, varied in volume from 150,000 acre-

feet to 390,000 acre-feet and was for environmental use. Cl was able to overflow to C2

(USACE and SFWMD, electronic correspondence, April 5, 2005). A conceptual view of

the two compartment reservoir for the original Alternative 3 is provided in Figure 3-1.

Subsequently, a decision was made that the total capacity of EAASR would be 360,000

acre-feet.



 MC NNRC
 EARMA1 EARNH1
 EARMA2 90,000 EARNH2
 ac-ft 2 z

 EARIN1 EARIN2





 270,000
 ac-ft



 WCS4S +
 EVBLSN


Figure 3-1. Conceptual Configuration of Reservoir for original Alternative 3 (USACE
 and SFWMD, electronic correspondence, April 5, 2005)