Battery Hagner (1906-1932) - Battery Peter Hagner was a reinforced concrete, Endicott Period 3 inch coastal gun battery on Fort Terry, Plum Island, Suffolk County, New York. The battery was named in G.O. 194, 27 Dec 1904, after Bvt. BG Peter V. Hagner (Cullum 866), U.S. Army (Col., Ordnance Department), who served with distinction during the Mexican-American War and the U.S. Civil War, and who died 11 Mar 1893. Battery construction started in October 1903, was completed in October 1906 and transferred to the Coast Artillery for use 22 Nov 1906 at a cost of $ 15,924.00. Deactivated in 1932.
Part of the Harbor Defense of Long Island Sound.
Originally built as an Endicott Period concrete coastal gun battery with two 3" M1903 guns mounted on M1903 Pedestal mounts. This was a two story battery with the guns on the upper level and the magazines on the lower level. Shells were moved from the magazine level to the gun loading platform by hand. No shell or powder hoists provided. Electrical power was furnished by the Quartermaster post power plant.
The guns were not mounted until 10 Jun 1909.
The U.S. entry into World War I resulted in a widespread removal of large caliber coastal defense gun tubes for service in Europe. Many of the gun and mortar tubes removed were sent to arsenals for modification and mounting on mobile carriages, both wheeled and railroad. Most of the removed gun tubes never made it to Europe and were either remounted or remained at the arsenals until needed elsewhere. The guns of Battery Hagner were not affected by the World War I redistribution or the following 1920 disarmament program.
Now on Plum Island Animal Disease Center (PIADC) operated by U.S. DHS. No period guns or mounts in place.