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 City of Solana Beach
Section 4
Shoreline and Coastal Bluff Management Strategies Draft MEIR
Cumulative Impacts
and therefore focuses on the potential cumulative impacts that may occur and broad/general
mitigation measures such as adoption of ordinances or regulations rather than the imposition of
conditions on a project-by-project basis. In addition, this discussion is structured by discussing
the cumulative impacts by each alternative and subsequent projects rather than by resource or
by foreseeable policies, projects, or programs.
No Project Alternative Continuation of Existing Policy
The No Project Alternative has cumulative impacts by nature because it is an existing policy that
would involve continuous permitting and construction of shoreline protective structures, with the
potential for the entire City's shoreline to become armored. Cumulative aesthetic impacts due
to the armoring of the region's coastal bluff with seawalls or gunite covering would not be
mitigated to below a level of significance.
As discussed in Sections 3.1 and 3.6, Alternative 1 reduces geologic/soils and visual cumulative
impacts, respectively, by promoting the implementation of seacave plugging and filling over the
construction of seawalls, bluff retaining walls, gunite covering, and similar permanent armoring
for shoreline protection. The City's Shoreline and Coastal Bluff Ordinance takes a more
proactive approach in reducing erosion of the bluffs and minimizes effects that could result in a
future need to construct a more intrusive device.
Repeal of Shoreline and Coastal Bluff Protection Ordinance Alternative
Cumulative aesthetic impacts associated with this Alternative would not be mitigated to below a
level of significance. As mentioned above, cumulative geologic/soils and visual impacts would
increase as a result of this Alternative because the potential of armoring the region's entire
coastal bluff with seawalls is higher under this Alternative.
Sand Replenishment and Retention Program Alternative
Sand replenishment and retention projects at Solana Beach would not have significant impacts
alone. Retention structures could potentially have impacts to downdrift beaches. Negative
impacts to downcoast beaches and lagoon inlet channels could occur from the placement of
structures that intercept sand traveling south and the buildup of sand at lagoon mouths. Design
features such as pre-filling the updrift beach and short groin fields that allow sand to bypass and
flow downdrift would lessen this impact. However, these mitigation measures would not reduce
cumulative impacts to less than significant levels. This alternative, in addition to the listed
projects and policies in the area, would create significant impacts in Solana Beach, Encinitas, or
Del Mar. Sand replenishment by nature has beneficial impacts to a receiver site. Further, this
alternative would have beneficial impacts to bluff erosion, as sand replenishment and retention
would reduce the rate of coastal bluff erosion. Overall, this alternative combined with other
projects considered in this cumulative impact assessment would result in significant cumulative
impacts.
Project No. 323530000
Page 4-7
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