Southport EIP

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Southport EIP at a Glance

The almost six-mile Sacramento River levee in Southport is the most vulnerable part of the City's levee system. The West Sacramento Area Flood Control Agency selected this part of the levee system for improvement now that improvements to two other vulnerable levees have been completed.


WSAFCA started investigating the Southport levee in 2007. The original effort focused on collecting data about the levee and conducting engineering analysis. This helped better understand the history of poor performance and determine what segments of the levee needed improvements to meet current engineering criteria. Preliminary alternatives were developed in 2009.

The design process started in 2010. Since then, the design team has hosted many public meetings for potentially affected property owners and other interested parties. Design studies have been conducted that evaluate, identify and suggest remedies for levee deficiencies have been made available to the public through public meeting.

Current Status

The WSAFCA Board of Directors identified the preferred design alternative on March 8, 2012. This was the result of technical evaluations and public outreach regarding design studies, previous information and staff recommendations. Now that the preferred alternative has been identified, additional analysis will focus on the effects on private property, the environment and community to determine how best to minimize and mitigate those impacts.

Currently working toward 65 percent design completion, the final project selection will be based on completion of enviromental studies. Value engineering studies in areas known as Segments B and F were conducted to make sure all technically feasible measures were investigated to minimize impacts to private property owners adjacent to the levee. 65 percent design results are anticipated to be shared with the WSAFCA Board in March or April 2013.

WSAFCA initially proposed the Southport Sacramento River EIP in 2011. On August 26, 2011, WSAFCA issued a Notice of Preparation (NOP) for the EIP and undertook a 30-day comment period. Since that time, WSAFCA has expanded the EIP study area to include additional soil borrow sites that may be employed to provide borrow material needed to construct the EIP. Due to the expansion of the study area, a supplemental NOP has been issued and a supplemental 30-day public comment period starts March 8, 2013. All interested parties are invited to comment.

The Environmental Impact Statement and Report should be complete by mid 2013. The selection of the final project alternative is anticipated in fall of 2013 upon certification of the EIS/EIR and 100 percent design completion.

Decision-Making Process

WSAFCA has a design decision hierarchy that is followed for its flood control projects. This ensures that technical feasibility and refinement are based on engineering studies to ensure effective solutions are met. WSAFCA's investigation, evaluation and design of the Southport Sacramento River EIP has advanced through a sequence of progressively detailed stages based on the best available information. This progressive approach is the most time and cost effective method to identify feasible deficiencies and determine remedies on the physical conditions of the Southport Sacramento River levee.

For additional information, including environmental and design studies, project schedules and regulatory processes, please visit the additional pages listed.

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