Executive Summary
The Mission Beach receiver site would stretching from Ostend Court to Santa Barbara Place, a distance
of approximately 2,380 feet (0.5 mile). The southern boundary of the fill site would be identical to
Alternative 1. Other characteristics of the proposed fill would be similar to Alternative 1.
In Imperial Beach, the beach replenishment berm would be built along approximately 3,470 feet (0.7 mile)
of beach, from Imperial Beach Boulevard to approximately 1,000 feet south of Encanto Avenue. This
receiver site footprint would be longer than proposed under Alternative 1 at both the north and south ends.
Other characteristics of the proposed fill would be similar to Alternative 1.
Borrow Sites
Under this alternative, the borrow site locations would remain as under Alternative 1, but the sand quantity
would change and the number of receiver sites would decrease. Overall, the surface area extent would
remain the same under Alternative 1 and Alternative 2, but the depth of dredge would increase at borrow
sites MB-1 and SS-1. Table ES-5 summarizes pertinent characteristics of the dredge areas under this
alternative.
Table ES-5
Alternative 2 Borrow Site Characteristics
Approx. Surface
Volume of Sand to
Area to be Dredged
Depth of Dredge
Water Depth
Borrow Sites
be Dredged (in cy)
(in acres)
(in feet)
(in feet, MLLW)
SO-9(1)
627,000(2)
63
Max. 15
45 to 55
SO-7(3)
360,000
70
1 to 11
60 to 85
SO-6
104,000
29
3 to 4
60 to 80
SO-5
788,000(2)
127
Max. 6
50 to 80
MB-1
150,000
19
Max. 10
68 to 75
SS-1
180,000
22
Max. 7
40 to 53
With dredge area modified to provide a larger buffer between previously unmapped artificial reef areas,
R
(1)
the dredge area would be reduced by approximately 25 percent. The borrow site may be eliminated
R
during final design.
R
Volume includes overfill factor (Moffatt & Nichol 2000c).
R
(2)
Possible expansion to 1.5 million cy with total surface area of 150 acres if SO-9 and SO-6 are eliminated.
R
(3)
Maximum depth of dredge would be 15 feet.
R
Page ES-14
Regional Beach Sand Project EIR/EA
99-69\SANDAG EIREA es.wpd 7/17/00
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