Published 7/23/2009 on LBPOST.com
The study conducted by a local engineering firm determines several
methods by which the breakwater could be modified, potentially
re-introducing waves and earning the City up to $52 million annually in
summary of the major findings reveals that engineering firm Moffatt
& Nichol (commissioned by the City of Long Beach to produce the
study) has found multiple ways in which the breakwater may be
reconfigured in order to improve water quality and possibly even
re-introduce waves to Long Beach shores.
In total, the report consists of a 162-page final analysis (click here to download), a 71-page project management plan (click here to download), and a 5-page executive summary (click here to download).
From the summary:
Summary of Major Findings
- The study identifies a number of potential solutions/alternatives to improve the ecosystem.
- Moffatt & Nichol identified five basic alternatives to analyze for potential costs and benefits.
removal of the breakwater is not recommended in the study as a feasible
option, as there are too many negative impacts that cannot be
effectively mitigated in a cost-effective manner.
- The study alternatives range in construction cost from approximately $10 million to $310 million.
- The study alternatives range from creating wave heights of 0 times to 4 times current size in some areas of the shoreline.
study alternatives can create up to 500 acres of kelp bed and up to 300
acres of rocky reef habitat from removed breakwater sections.
study does not conclude if there is or is not federal interest, as that
function can only be performed by the Army Corps. The study does
provide evidence that many of the alternatives considered could both
restore the ecosystem and create recreational value.
- Some of
the Breakwater reconfigurations have a potential for significant wave
energy increases to existing Port infrastructure, THUMS oil islands,
Navy anchorage, and City beaches that would require mitigation.
the goal is solely hard bottom habitat ecosystem restoration, then
importing rock to create kelp beds and rocky reef habitat is most cost
effective; however, that solution would not address the City’s goals of
improved water quality, renewing the City’s beaches, or increasing wave
- The City of Long Beach could gain increases of up
to $52 million per year in local spending and economic activity, and
potentially up to $6.7 million per year in taxes and parking fees and
fines for the maximum recreation improvement scenario.
redirecting the mouth of the Los Angeles River, water quality could
likely be improved along the shoreline with or without changes to the
- All five alternatives examined could provide
significant ecosystem restoration and some had recreational benefits
exceeding the construction costs; however, four of the five
alternatives cost more to build than the SCE Wheeler Kelp Reef on a
cost-per-acre basis, due to the costs of reconfiguring the Breakwater
or building the LA River training structure.
- Moffatt &
Nichol estimate that a Feasibility study phase (to be conducted by the
Army Corps) would cost approximately $7 million and take four years to
complete. The City of Long Beach would be responsible for funding 50
percent of the cost of the study, which could consist of a mix of
non-federal funding sources.