Battery Hagner

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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.

Endicott Period

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.

Battery Hagner Armament (edit list)
Model Serial
Manufacturer Carriage Service
1 3" Rifle 170" M1903 59 Watervliet Pedestal mounts,
M1903, #90, Detrick & Harvey
1909-1932 See note 1
2 3" Rifle 170" M1903 55 Watervliet Pedestal mounts,
M1903, #89, Detrick & Harvey
1909-1932 See note 1
Source: RCW Form 1, 1 Nov 1926, 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, 206
Note 1: Guns mounted 10 Jun 1909. Guns transferred to Fort H.G. Wright, Battery Hoppock, 26 Apr 1933, carriages dismounted and stored 9 Sep 1932. CDSG Gun Card Collection from NARA
Battery Hagner Plan

World War I

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.

In 1932 both guns were removed and sent to Battery Hoppeck, Fort H.G. Wright. The carriages were sent to storage.

Current Status

Now on Plum Island Animal Disease Center (PIADC) operated by U.S. DHS. No period guns or mounts in place.

Location: Plum Island, Suffolk County, New York. Map point may not be accurate.

Maps & Images

Lat: 41.169528 Long: -72.203098

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  • Elevation: 22.54'



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