4.6 Land and Water Use
SO-5
The San Diego-La Jolla Underwater Park is located approximately two miles south of SO-5, which is
adequate distance to avoid any adverse impacts to the park. No other land or water use impacts would
occur under Alternative 1.
MB-1
MB-1 is within the Mission Bay Artificial Reef (which includes Wreck Alley) and is adjacent to the San
Diego Underwater Recreation Area. As illustrated in Figure 2-19, there are no artificial reefs within the
dredge area itself. The closest artificial reef utilized primarily by sport fishermen is the Mission Bay Bridge
Wreckage Site No. 1, located approximately 1,000 feet to the south. The closest sunken structures or
wrecks frequently utilized by sport scuba divers are the NOSC Tower, the Ruby E, and the Yukon, located
approximately 1,800, 2,000, and 3,000 feet from the dredge site, respectively. While these are the most
popular local wrecks for dive charter businesses as well as recreational divers, these artificial reefs/dive
sites would not be directly impacted during dredge operations. Turbidity plumes are not projected to reach
the dive sites. There may be increased underwater noise experienced by those visiting nearby underwater
sites, and dive and fishing vessels transiting between features may have to maneuver to avoid the dredge
operations, but dredging operations would be short-term (approximately 11 days). A letter of non-
objection from CDFG would be required for dredging activities within the MBAR (Bedford 1999).
Impacts would be less than significant.
SS-1
Given the distance from the borrow site to the City of San Diego outfall and ocean monitoring stations,
there would be no long-term effect from dredging activities.
Mitigation Measures for Alternative 1a
No significant impacts have been identified; accordingly, no mitigation measures are necessary.
This alternative would differ from Alternative 1a in that construction of the proposed action would comply
with applicable jurisdictions' noise ordinances. Because dredging and replenishment activities would take
a longer amount of time, the receiver sites would be closed longer than under Alternative 1a (refer to Table
Regional Beach Sand Project EIR/EA
Page 4.6-5
99-69\sect-04.06.wpd 7/19/00