Yerba Buena Island Lighthouse

The Yerba Buena Island Lighthouse was constructed in 1873, but it did not begin operation until 1875 when the fifth order lens was transferred from Yaquina Lighthouse in Oregon.

Architecture and Construction

• The lighthouse is a white octagonal tower. It stands at a height of 5 units above sea level, with a focal height of 29 units above sea level.
• The light source is a white character, with a range of 14 nautical miles and a period of 4 seconds.

Light Characteristics

The Yerba Buena Island Lighthouse emits a white light, visible to mariners over a distance of 14 nautical miles. The light has a distinctive character, denoted as "Oc", indicating an occulting (moving) light source.

Current Status

The lighthouse is currently operated by the U.S. Coast Guard and serves as a navigational aid for vessels in San Francisco Bay. It is not automated but remains operational under the guidance of human watchkeepers.

Location and Accessibility

The Yerba Buena Island Lighthouse is located on Hillcrest Road, within the boundaries of Yerba Buena Island in San Francisco Bay. The island is accessible via the Yerba Buena Tunnel, which connects it to the western and eastern spans of the San Francisco–Oakland Bay Bridge.

Heritage Status

The lighthouse has been designated as a National Register of Historic Places (NRHP) site, with a reference number of 91001096. It falls under two NRHP criteria: (A), for its historic significance, and (C), for its architectural and engineering qualities.

Notable Historical Events

Although specific details are not available, the Yerba Buena Island Lighthouse has played an important role in maritime navigation in San Francisco Bay.