Battery Wansboro

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Battery Wansboro (1907-1945) - Battery Wansboro is a reinforced concrete Endicott Period 3- inch gun battery on Fort Flagler, Washington. Named in G.O. 194, 27 Dec 1904, after 2nd Lt. Thomas A. Wansboro, 7th U.S. Infantry, who was killed in action 1 Jul 1898 at El Caney, Cuba, during the Spanish-American War. Battery construction started in 1903, was completed in 1905, and transferred to the Coast Artillery for use on 23 Apr 1907 at a cost of $ 14,000. Abandoned in 1946.

Battery Thomas Wansboro

Endicott Period

Part of the Harbor Defense of Puget Sound. Battery Wansboro faces Admiralty Inlet on the east shore of Fort Flagler in Washington State.

The battery consisted of two, 3” M1903 guns on M1903 pedestal mount carriages, with two supporting magazines and a center storeroom. In October 1945, both guns and carriages were declared obsolete and in March 1946, both guns and their carriages were processed for salvage.

Battery Wansboro Armament (edit list)
Model Serial
Manufacturer Carriage Service
1 3" Rifle 170" M1903 35 Watervliet Pedestal Mount, M1903, #16, Watertown 1907-1946 See Note 1
2 3" Rifle 170" M1903 16 Watervliet Pedestal Mount, M1903, #79, Watertown 1907-1946 See Note 1
Source: Coast Defense Study Group, Berhow, Mark A. ed, American Seacoast Defenses: A Reference Guide, 2nd Edition, CDSG Press, McLean, VA, 2004, ISBN 0-9748167-0-1, pages 74-75, 216
Note 1: Guns and carriages declared obsolete 18 Oct 1945 and processed for salvage 7 Mar 1946. CDSG Gun Card Collection from NARA
Battery Wansboro Plan

Current Status

A part of Fort Flagler State Park, Jefferson County, Washington. The battery is accessible to the public with period guns on display. After Fort Flagler was purchased as a state park, two 3” M1903 guns and carriages were brought over from Fort Wint in the Philippines and installed for display. The battery’s magazines have 155mm powder canisters (empty) in racks on display behind mesh barriers.

Location: Fort Flagler Jefferson County, Washington.

Maps & Images

Lat: 48.092813 Long: -122.692976

  • Multi Maps from ACME
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  • Elevation: 55.37'

GPS Locations:



Fortification ID:

  • WA0071 - Battery Wansboro

Visited: 5 October 2009

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