Proposed Action

The proposed project would result in safer, more secure, and more efficient naval operations and would improve public access.

The Navy proposes to construct:

  • A replacement ammunition pier (approximately 1,100-feet by 125-feet)
  • Associated waterfront facilities
  • A causeway and truck turnaround
  • A new public navigation channel for civilian boat traffic to and from Huntington Harbour

The new pier would be built to current earthquake standards, would be able to support future fleet requirements, and would provide greater separation between Navy operations and civilian transportation routes.

The project would include dredging for the proposed pier, ship turning basin, and new public navigation channel. Dredged material could be used for project elements, including the creation of the causeway, truck turnaround, and for widening of the south mole. Unused dredged material could be used for habitat conservation, provided for beach replenishment (if suitable), and/or disposed in designated offshore locations (subject to U.S. Environmental Protection Agency approval).

The proposed project would increase security, safety, and operational efficiency by:

  • Constructing a new pier designed to withstand likely earthquake scenarios
  • Increasing the number and type of ships able to be serviced at the base
  • Providing greater separation between Navy operations, civilian boat traffic, and vehicular traffic on public transportation routes

Planning and Construction

Seal Beach Wharf Pelican

During planning and construction, the Navy would work closely with regulatory agencies to minimize impacts on the public and environment. Construction activities would include pile driving, which could impact environmental resources. The Navy would implement the measures described in the Revised Draft EA to mitigate, minimize, and avoid environmental impacts during construction.

Construction activities would occur in phases to maximize access for civilian boaters transiting through Anaheim Bay to and from Huntington Harbour. The expected duration for construction of the proposed project would be approximately five to six years.

Alternatives Studied

During development of the Revised Draft EA, the Navy evaluated the Proposed Action and several alternatives for fulfilling the purpose and need.


Alternative 1 (Preferred Alternative): Ammunition Pier at South Mole with Interior Public Navigation Channel

Alternative 1 is the Navy’s preferred alternative because it best meets the purpose of and need for the Proposed Action. Implementation of Alternative 1 provides the most cost effective construction alternative without resulting in significant impacts on the environment.

Naval Weapons Station Seal Beach Ammunition Pier and Turning Basin EA - Alternative 1 MapAlternative 1 Map
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Alternative 2: Ammunition Pier at South Mole with Exterior Public Navigation Channel

Naval Weapons Station Seal Beach Ammunition Pier and Turning Basin EA - Alternative 2 MapAlternative 2 Map
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Alternative 3: Ammunition Pier Parallel to South Mole with Exterior Public Navigation Channel

Naval Weapons Station Seal Beach Ammunition Pier and Turning Basin EA - Alternative 3 MapAlternative 3 Map
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No Action Alternative:

Under the No Action Alternative, the Proposed Action would not occur. As required by federal law, the No Action Alternative is carried forward for analysis in the EA, and provides a baseline for measuring the environmental impacts of the action alternatives. The No Action Alternative does not meet the Navy’s purpose of and need for the Proposed Action.

Naval Weapons Station Seal Beach Ammunition Pier and Turning Basin EA - No Alternative MapNo Action Alternative Map
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For more information on the Proposed Action and alternatives, please see the project fact sheet or the Revised Draft EA.

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