Battery Dalliba

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Battery Dalliba (1905-1946) - Battery James Dalliba 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 James Dalliba, assistant commissary general of ordnance, who served from 1811 to 1824, and who died 8 Nov 1832. Battery construction started in September 1902, was completed in May 1905 and transferred to the Coast Artillery for use 28 Aug 1905 at a cost of $ 17,500.00. Deactivated in 1946.

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 emplacement power plant in Battery Stoneman.

Both guns were mounted on 23 Jul 1909.

Battery Dalliba Armament (edit list)
Model Serial
Manufacturer Carriage Service
1 3" Rifle 170" M1903 65 Watervliet Pedestal mount, M1903,
#85, Detrick & Harvey
1909-1946 See note 1
2 3" Rifle 170" M1903 53 Watervliet Pedestal mount, M1903,
#86, Detrick & Harvey
1909-1946 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: CDSG Gun Card Collection from NARA
Battery Dalliba 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 Dalliba were not affected by the World War I redistribution or the following 1920 disarmament program.

World War II

Guns and carriages processed for salvage 15 Mar 1946.

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

Maps & Images

Lat: 41.188293 Long: -72.162605

  • Multi Maps from ACME
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  • Elevation: 31.04'


  • U.S.Army, Supplement to the Harbor Defense Project of Long Island Sound, (HDLIS-AN-45), 15 Feb 1945, CDSG


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