2.0 Alternatives Considered
Table 2-3
Alternative 1 Borrow Site Characteristics
Approx. Surface
Area to be
Volume of Sand to
Dredged
Depth of Dredge
Water Depth
Borrow Sites
be Dredged (in cy)
(in acres)
(in feet)
(in feet, MLLW)
SO-9(1)
706,000(2)
63
Max. 15
45 to 55
R
SO-7(3)
496,000
70
1 to 11
60 to 85
R
SO-6
104,000
29
3 to 4
60 to 80
656,000(2)
SO-5
127
Max. 6
50 to 80
R
MB-1
100,000
19
Max. 6
68 to 75
SS-1
120,000
22
Max. 6
40 to 53
(1)
With dredge area modified to provide a larger buffer between previously unmapped artificial reef areas,
R
the dredge area would be reduced by approximately 25 percent. The borrow site may be eliminated
R
during final design.
R
(2)
Volume includes overfill factor (Moffatt & Nichol 2000c).
R
(3)
Possible expansion to 1.5 million cy with total surface area of 150 acres if SO-9 and SO-6 are eliminated.
R
Depth of dredge would be maximum 15 feet.
R
While SO-9 and SO-6 are shown as possible borrow sites, they may be eliminated and additional material
R
may be removed from SO-7. Figure 2-16 illustrates the possible expansion dredge area at SO-7.
R
Alternative 1b
Under Alternative 1b, the proposed action would be implemented at the same receiver sites using the same
borrow sites as described for Alternative 1a; however, adherence to applicable noise ordinances would
limit the hours and number of days per week that beach replenishment could occur. For instance,
operations on Sundays and construction after 7:00 p.m. is prohibited in some jurisdictions. Receiver sites
located on land within the State Parks system or administered by the State would not be subject to local
noise ordinances and construction could continue on the 7/24 schedule even under this alternative. This
applies to the South Carlsbad North receiver site. All receiver sites in Encinitas would be exempt from the
City's Noise Abatement Ordinance as a "federal or state pre-empted activity" (Municipal Code Section
9.32.417(c)). While the Torrey Pines receiver site is within the State Park land and would be exempt, a
booster pump would likely be required in the Del Mar jurisdiction. For purposes of disclosure and
comparison, this receiver site is considered constrained under Alternative 1b. Because the construction
schedule would be limited, the proposed replenishment would take longer. Also, less sand would be
delivered to some of the receiver sites due to budgetary constraints. Table 2-2 identifies which receiver
Page 2-38
Regional Beach Sand Project EIR/EA
99-69\SANDAG EIREA 3.4.wpd 7/17/00
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