Definition
Mare Island Light is a historic lighthouse that was situated on Mare Island in Vallejo, California, United States. It served as a navigational aid for vessels entering and exiting the San Pablo Bay and the adjacent Mare Island Naval Shipyard.
Overview
Constructed in 1873, the Mare Island Light was part of a broader network of lighthouses established along the California coast to support the growing maritime traffic of the late 19th and early 20th centuries. The light was operated by the United States Lighthouse Service and later the United States Coast Guard. It was deactivated in 1917, after which its function was superseded by modern navigational technologies and other nearby aids to navigation. The lighthouse structure remained intact after deactivation and has been recognized for its historical significance, being listed on the National Register of Historic Places.
Etymology/Origin
The name “Mare Island Light” derives directly from its location on Mare Island, an artificial island created in the mid‑19th century for the United States Navy’s Mare Island Naval Shipyard. “Mare” is Latin for “sea,” referencing the island’s maritime context.
Characteristics
- Construction: The lighthouse was built of masonry with a brick tower rising approximately 30 feet (9 m) above the ground.
- Design: It featured a cylindrical tower topped by a lantern room, typical of coastal lighthouses of the period.
- Optics: The original light apparatus employed a Fresnel lens, likely a fourth‑order lens, which produced a fixed white light visible for several nautical miles.
- Color Scheme: The tower was painted white with a black lantern roof, providing visual contrast against the surrounding landscape.
- Automation: The station remained manually operated throughout its active service; no automation was installed before its deactivation.
- Current Status: The structure has been preserved as a historic site. While no longer functioning as an aid to navigation, it is occasionally accessed for educational and heritage purposes.
Related Topics
- Mare Island Naval Shipyard: The naval installation for which the lighthouse provided navigational support.
- List of Lighthouses in California: Mare Island Light is included among the state's historic lighthouses.
- United States Lighthouse Service: The federal agency responsible for the construction and operation of the lighthouse.
- National Register of Historic Places (California): The register that recognizes the lighthouse’s historic value.
- Fresnel Lens: The type of optical apparatus used in many 19th‑century lighthouses, including Mare Island Light.