4.4 Biological Resources
replenishment to confirm that sand discharge operations would not result in long-term, net loss of sensitive
marine resources. The final monitoring plan and subsequent monitoring would be conducted by a biologist
familiar with southern California marine waters and biological habitats. SANDAG would submit the final
monitoring plan to the USACOE for approval, in consultation with the resource agencies, at least 15
working days prior to initiating onshore discharge at the receiver sites. The monitoring reports would be
submitted to the USACOE and resource agencies by January 30th of each year.
SANDAG would mitigate any significant, long-term adverse impacts to sensitive marine resources that
were documented by the monitoring effort to have resulted from discharge activities via restoration or
creation of like habitat at a 1:1 ratio as described in Section2.5. A "not-to-exceed" cap on mitigation costs
would be negotiated by SANDAG, similar to the previously permitted Navy Homeporting project.
Impacts of Alternative 1b
Under Alternative 1b, the proposed action would be implemented at the same 12 receiver sites using the
same six borrow sites as described for Alternative 1a. The differences would be: 1) under Alternative 1b,
the duration on site at several of the borrow and receiver sites would be extended due to the required
adherence to noise ordinances, and 2) the quantity of sand dredged and deposited on the beaches would
be less for the South Oceanside, North Carlsbad, Solana Beach, Del Mar, Torrey Pines, Mission Beach,
and Imperial Beach sites.
Receiver Sites
Direct impacts resulting from implementation of Alternative 1b would be similar to those identified for
Alternative 1a, as all receiver sites would be the same for both alternatives. The quantity of sand deposited
on the beaches would be less for the South Oceanside, North Carlsbad, Solana Beach, Del Mar, Torrey
Pines, Mission Beach, and Imperial Beach sites. Given the smaller quantity of sand, either the thickness
of the sand would be less, or the length would decrease. There would be no significant direct impacts
under Alternative 1a, and less sand would not result in any direct impacts beyond those previously
discussed.
Indirect impacts resulting from sediment transport related to movement of sands from the fill sites, and the
decreases in marine water quality associated with beach replenishment activities were analyzed in detail
under Alternative 1a. The quantity of sand deposited on the beaches would be less for the South
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99-69\SANDAG EIREA 4.1 to 4.13.wpd 7/17/00
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