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 City of Solana Beach
Section 3
Shoreline and Coastal Bluff Management Strategies Draft MEIR
Environmental Impact Analyses
Substantially adverse alteration of topography beyond that resulting from natural erosional
and depositional processes would occur.
Substantially adverse disruption, displacement, compaction, or overcovering of the soil
would occur. Substantial irreversible disturbance of the soil materials at the location could
cause their use for normal purposes in the area to be compromised.
Impacts of the following geohazards on the alternative would be considered significant if:
Ground rupture occurs due to an earthquake or a known active fault, causing damage to
structures, limiting their use due to safety considerations or physical conditions, or causing
injury or death.
Earthquake-induced ground shaking occurs causing liquefaction, settlement, or surface
cracks at the location and attendant damage to proposed structures, causing a substantial
loss of use or exposing the public to substantial risk of injury.
Historic soil failure occurs due to liquefaction.
Slope failure occurs on bluff areas that would become unstable on- or off-site as a result of
the alternatives.
Flooding caused by 100-year storm events combines with an extreme high tide or seismic
sea wave that is capable of causing substantial damage to structures or exposing the public
to substantial risk of injury.
Seiches or tsunamis caused by nearby or distant earthquakes that are likely to occur in the
lifetime of the alternatives are capable of causing substantial damage to structures or
exposing the public to substantial risk of injury.
3.1.2.2 Impact Assessment
Alternative 1 No Project - Continuation of Existing Policy
Continuation of the Shoreline and Coastal Bluff Protection Ordinance in the long term will likely
result in armoring the entire natural coastal bluff with shoreline protection structures in Solana
Beach, though the continued use of smaller structures such as notch fills and seacave fills
would avoid the need for larger, more damaging seawalls, which would be more prevalent under
Alternative 2, in which the City would repeal its Ordinance and leave the permitting of shoreline
protective structures to the Coastal Commission. The intent of these structures is to reduce the
potential for future significant landsliding, block falls, and erosion, thereby protecting private
property and residential structures. The following presents the effects of protective devices on
the coastline.
Project No. 323530000
Page 3-12
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