Constructed in 1873-74, East Brothers Light Station is the older of only two remaining light stations of San Francisco Bay that have remained substantially unchanged. Its original 5th order classical Fresnel lens was replaced with the present beacon when the station was automated in 1969 after 95 years of operation by keepers of the Lighthouse Service and later the U.S. Coast Guard. In 1971, East Brothers Light Station was entered on the National Register of Historic Places. In 1980, after ten years of benign neglect, rehabilitation began with the assistance of the U.S. Coast Guard, a matching grant from the Department of the Interior, Heritage Conservation and Recreation Services under the provisions of the National Historic Presentation Act of 1966, the California State Office of Historic Preservation, and the efforts of hundreds of individuals who contributed their labor and resources to preserve this landmark for the enjoyment and benefit of the public. It is dedicated to the brave and faithful men and women of the U.S. Lighthouse Service and the U.S. Coast Guard.