2.0 Alternatives Considered
Additionally, there are two possible construction variations one involves the potential for construction
seven days a week, 24 hours a day (7/24) and the other involves some restrictions on construction times
and days consistent with local noise ordinances, where applicable. These two variations are addressed as
variations (a) and (b) for each alternative. The vast majority of dredge operations utilize a 7/24 timeframe
to increase efficiency and minimize cost. Given the fixed budget for this project, any increase in
construction cost would translate to a decrease in sand volume. Generally, adherence to applicable noise
ordinances would result in construction duration increasing 30 percent and the volume of sand reducing by
up to 50 percent. Finally, the No Action Alternative is evaluated.
The description of Alternative 1 is structured as follows. First the receiver sites and borrow sites are
described in detail. Sand volumes are indicated based on the 7/24 construction practice (Alternative 1a).
Then, Alternative 1b is described where adherence to the applicable noise ordinance would affect length
of construction and sand quantity at some receiver sites. Following the description of these two variations
is a detailed description of the construction method how the dredging would be performed, how beach
building would occur, location of staging areas and booster pumps, length of beach closures, etc.
Alternative 2 is also described in terms of variation (a) or (b) given the construction scenarios.
Construction methods would not vary under Alternative 2, although staging areas and booster pump
locations are identified as appropriate.
2.4.1
Alternative 1
Alternative 1 is beach replenishment in the San Diego region with up to 2 million cy of sand to be deposited
at 12 receiver sites. The receiver sites are located from Oceanside to Imperial Beach. Sand would be
dredged from 6 possible offshore borrow sites.
Alternative 1a
Receiver Sites
The general process for sand dredging, delivery, and spreading is similar for all receiver sites. After sand
is dredged from a borrow site, it is pumped through dredge discharge lines to the shore. Existing sand is
used to build a dike between the ocean and receiver site and the dredge material is placed behind the dike
to help reduce turbidity. As the material deposits, it is spread along the shore to create a berm higher than
the existing sand area. The berm would slope gently back to the existing beach elevation to form a berm
Regional Beach Sand Project EIR/EA
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99-69\SANDAG EIREA 3.4.wpd 7/17/00
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