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Waves in Long Beach Feasibility Study

2275 days 2 hours 46 minutes 20 seconds

The U.S. Army Corps of Engineers said it should take four years to complete the East San Pedro Bay Ecosystem Restoration Feasibility Study. We’re starting the clock from November 30, 2010 at 10:30 am, the time and the date of the Signing Ceremony between the City of Long Beach and the Army Corps.

For more information on the study go to the City of Long Beach page at:

or the U.S. Army Corps web page at:

This is an example of a Scope of Work for studies that would be useful to reconfigure the breakwater.

Task 1: Characterize Existing Conditions ($10,000 – $25,000)

The existing conditions of the region behind the breakwater (e.g., San Pedro Bay, Seal Beach Shoreline, and Long Beach Shoreline) and the offshore area immediately in front of the breakwater would be characterized, including the wave climate, Bay circulation, sediment transport, human uses, and biological resources. The characterization would be based on a review of existing data sources and prior project/study reports as it is expected that there is sufficient information available to adequately characterize the area to be affected by breakwater crest reduction. Existing information on recreational beach and nearshore area use will also be compiled as part of this task to provide the information for subsequent comparison to the conditions expected upon breakwater crest reduction.

Task 2: Identify Opportunities and Constraints ($15,000 – $25,000)

Use the information developed in Task 1 to identify opportunities and constraints related to breakwater crest reduction. Anticipated opportunities include recreation improvements (e.g., surfing, swimming, and beach activity enhancement), water quality improvements (e.g., decreased residence time), economic improvements (e.g., increased beach use and associated facilities, increased surf fishing, storm damage reduction for Peninsula Beach, and reef-induced commercial fisheries enhancement). Expected constraints include navigation impacts to vessels using the Bay area (e.g., Alamitos Bay, Belmont Pier, Shoreline Marina, City marine taxi, and POLB/POLA), erosion impacts to the shoreline (e.g., Seal Beach, Peninsula Beach, and Long Beach Bluffs), and wave impacts to coastal and nearshore property/infrastructure (e.g., Seal Beach Pier, Seal Beach coastal residences, San Gabriel River/Anaheim Bay Jetties, Peninsula Beach coastal residences, City Beach concessions/restrooms, Long Beach Bluffs Park and commercial development, THUMS Oil Islands, and North Energy Island Borrow Site Confined Aquatic Disposal Site).

Task 3: Formulate Alternatives ($15,000 – $30,000)

The opportunities and constraints developed in Task 2 will be utilized to formulate a set of two to five alternatives for breakwater modification. At this point it is expected that the following three alternatives would be required to capture a reasonable range of balance between opportunities and constraints.

Alternative 1: Crest Reduction of Breakwater

Alternative 2: Complete Breakwater Removal

Alternative 3: Partial Breakwater Removal (e.g., segmented removal)

The provision for other alternatives would be done to allow consideration for optimization of these alternatives. For example, it might prove useful or even necessary to consider a range of options for the crest reduction alternative to assess the impacts and benefits of various crest elevations.

Task 4: Analyze Alternatives ($100,000 – $500,000/$750,000)

Analyze the alternatives developed under Task 3 to estimate the most significant impacts (negative and positive) to the environment. The primary impacts are expected to involve the wave climate, Bay circulation, and sediment transport. The wave climate impact analysis would include an assessment of effects to both short-period and long-period waves compared to existing conditions. Analyses would be performed to estimate modifications in the tidally-forced, wave-induced, and fluvially-influenced current regime of the Bay caused by changes in the breakwater configuration. The sediment transport analysis would assess the changes in long-shore and cross-shore sediment transport associated with changes to the wave and circulation regime within the Bay. If the impacts to the physical environment are estimated to be substantial then a subsequent analysis would be performed to quantify the effects on navigation operations (e.g., mooring, loading/offloading, and transit) within the study area.

Prepare construction methods and associated cost estimates for reduction of the breakwater crest, including construction of rocky reef habitat and anticipated mitigation measures that might be required such as beach nourishment along peninsula beach and modification of slope protection around THUMS oil islands. Beach nourishment costs would include initial fill costs as well as subsequent recurring costs for renourishment to maintain a protective beach.

Conduct an economic analysis for the three alternatives including recreation, retail, tourism, navigation, and real estate valuation as well as changes to the ecological environment. Consideration should be given to the use of multiple methods to analyze the benefits and costs related to human and ecosystem components.

Task 5: Evaluate Alternatives ($30,000 – $60,000)

Rank the alternatives developed under Task 4 against specific criteria (absolute ranking), one another (relative ranking), or a combination of both. Alternatively, the feasibility study could simply lay out information in an objective format for subsequent use by decision makers in selecting an alternative. Identify potential sources of funding for breakwater crest reduction (e.g., USACE and NOAA ecosystem restoration project) as well as implementation of any required mitigation measures such as beach nourishment along Peninsula Beach (e.g., USACE storm damage reduction project).

Task 6: Prepare Summary Report ($25,000 – $50,000)

Prepare a draft and final summary report with text and figures written to a level suitable to a target audience composed of City staff, City Council, Surfrider members, and interested members of the public.

Task 7: Attend Meetings (varies based on level on desired coordination)

It is anticipated that several meetings will be needed to coordinate with the City and Surfrider. At this time, a kickoff meeting is schedule for the beginning of the project and progress meetings will be conducted on a quarterly basis. In addition, the briefings will be held with the City Council as needed. Public outreach and education will be achieved through regularly scheduled meetings, informational pamphlets, and updates on the City and Surfrider websites.

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