Battery Cogan

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Battery Cogan (1908-1924) - Battery Patrick Cogan was a reinforced concrete, Endicott Period 3 inch coastal gun battery on Fort Baldwin (1), Sagadahoc County, Maine. The battery was named in G.O. 20, 25 Jan 1906, after 2nd Lieutenant Patrick Cogan, 5th Continental Army, and quartermaster, 1st New Hampshire Regiment, Continental Army, who died 31 Aug 1778. Battery construction was completed and transferred to the Coast Artillery for use 13 Nov 1908 at a cost of $ 20,500.00. Deactivated in 1924.

Battery Cogan Gun Emplacement #1
Battery Cogan BC-CRF Station
Battery Cogan

Endicott Period (1890-1910)

Part of the Harbor Defense of the Kennebec River, Maine.

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 located on the upper level and the magazines below. Shells were moved from the magazine level to the gun loading platform by hand. No shell or powder hoists were provided.

Battery Cogan Armament (edit list)
Model Serial
Manufacturer Carriage Service
1 3" Rifle 170" M1903 19 Watervliet Pedestal, M1903, #22, American & British 1908-1924 See note 1
2 3" Rifle 170" M1903 21 Watervliet Pedestal, M1903, #23, American & British 1908-1924 See note 1
Source: RCB, 31 Dec 1910, CDSG, 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
Note 1: Guns and mounts transferred to Fort Preble 21 Mar 1924. CDSG Gun Card Collection from NARA
Battery Cogan Plan

World War I (1917-1918)

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 Cogan were not affected by the World War I redistribution or the following 1920 disarmament program.

With the closure of Fort Baldwin (1) in 1924, Battery Cogan was deactivated with the guns and mounts sent to Fort Preble for storage. The guns and mounts were transferred to Fort Preble 21 Mar 1924.

Current Status

Part of Fort Baldwin Memorial State Park, Sagadahoc County, Maine. No period guns or mounts in place.

Location: Fort Baldwin, Sagadahoc County, Maine

Maps & Images

Lat: 43.751501 Long: -69.788815


  • U.S. Army Corps of Engineers, FUDS Archives Search Report, Findings, Fort Baldwin Military…ME011702, Phippsburg, ME. Large pdf download
  • U.S.Army, Supplement to the Harbor Defense Project of Portland, Maine, (HDPB-AN-45), 11 Apr 1945, CDSG


Visited: 14 Jun 2012

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