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 City of Solana Beach
Section 2
Shoreline and Coastal Bluff Management Strategies Draft MEIR
Project Description
constrained throughout to highly constrained at Seaside and Tabletop Reefs with the exception
of Fletcher Cove (south end), which is less constrained. Future sand replenishment projects
would probably be located at Fletcher Cove. Solana Beach has identified a possible future reef
at Fletcher Cove, either submerged or with an emergent component if made to look like a
natural feature (SANDAG 2001b).
2.3.4 Implementation
Costs estimates for sand replenishment and sand retention structures represent present value
costs, i.e. the amount of capital required today to both build a structure and maintain it
periodically in the future, taking into account inflation, current interest rates, and construction
cost escalation (not necessarily the same as the overall inflation rate). The project life for the
cost analysis is assumed 50 years. Tables 2-2 and 2-3 provide a comparison of the present
value cost for sand replenishment without sand retention structures and with sand retention
structures respectively. Itemized cost elements include (SANDAG 2001b):
Initial construction cost for the structures.
Pre-filling the estimated retained beach volume with sand from outside the littoral
zone as mitigation for impacts associated with sand impoundment behind the
structure.
Full mobilization costs were assumed for the beach pre-fill since it was not
reasonable to assume that the construction would be concurrent with a regional
beachfill project.
Future maintenance of the structures.
Allowance for future replenishment of the retained beach areas due to storms.
Allowance for engineering, design, supervision and administration costs.
Allowance for surfing impact mitigation cost (breakwater only), assumed to be
construction of an artificial surf reef (without sand retention characteristics) in the
vicinity.
California Coastal Commission Sand Mitigation Fee
The California Coastal Commission currently has a beach sand mitigation fee program in place
which includes a methodology to quantify the total volume of sand required to replace the losses
due to shoreline protection structures as a result of reduction in the material from the bluff,
reduction in the nearshore area, and loss of the available beach area. The money from the
mitigation fee program is to be used to implement projects that provide sand to the region's
beaches. A memorandum of agreement developed with SANDAG allows the Shoreline Erosion
Committee to implement those projects. As mentioned in Chapter 1.0, the cliffs in Solana
Beach do not contribute a significant amount of sand to the beach. Even if seawalls and
shoreline protection structures did not exist, Solana Beach would still experience a sand
shortage and a net southward migration of sand.
Project No. 323530000
Page 2-27
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