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Battery Alexander (1905-1943) - Battery Alexander was a reinforced concrete, Endicott Period 12 inch coastal mortar battery on Fort Barry, Marin County, California. The battery was named in G.O. 120, 22 Nov 1902 after Col. Barton S. Alexander, U.S. Corps of Engineers, bvt. Brig. Gen., who served with distinction in the Mexican-American War and the U.S. Civil War and who died at San Francisco, California, 15 Dec 1879. Battery construction started in 1901, was completed in 1903 and transferred to the Coast Artillery for use 8 Jun 1905 at a cost of $ 100,382.00. Deactivated in 1943.