Battery Laidley

Battery Laidley (1900-1931) - Battery Laidley was a reinforced concrete, Endicott Period 12 inch coastal mortar battery on Fort De Soto, Florida. The battery was named in G.O. 78, 15 May 1903 after Col. Theodore T. S. Laidley (Cullum 1116), Ordnance Department, U. S. Army, who rendered conspicuous service in the Mexican-American War and the U.S. Civil War, and who died April 4, 1886, at Palatka, Florida. Battery construction started November 1898, was completed April 1900 and transferred to the Coast Artillery for use 8 May 1900 at a cost of $ 155,651.96. Declared surplus 27 Jun 1931.

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  Battery Laidley Pit A Mortars
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  Battery Laidley Data Booth
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  Battery Laidley Magazine Rooms

History

Part of the Harbor Defense of Tampa Bay.

Endicott Period

Originally built as an Endicott Period concrete coastal mortar battery with eight 12" M1890MI guns mounted on M1896MI carriages.

Battery Laidley Armament (edit list)

Empl No	Caliber Type	Barrel Length	Model		Serial No	Manufacturer	Carriage	Service Dates	Notes
A1	12" Mortar	11' 9.5"	M1890MI		22	Watervliet	Mortar, M1896MI, #185, American Hoist	1900-1931	See note 1
A2	12" Mortar	11' 9.5"	M1890MI		132	Watervliet	Mortar, M1896MI, #186, American Hoist	1900-1931	See note 1
A3	12" Mortar	11' 9.5"	M1890MI		107	Watervliet	Mortar, M1896MI, #187, American Hoist	1900-1917	See note 2
A4	12" Mortar	11' 9.5"	M1890MI		85	Watervliet	Mortar, M1896MI, #188, American Hoist	1900-1917	See note 2
B1	12" Mortar	11' 9.5"	M1890MI		76	Watervliet	Mortar, M1896MI, #189, American Hoist	1900-1917	See note 2
B2	12" Mortar	11' 9.5"	M1890MI		86	Watervliet	Mortar, M1896MI, #183, American Hoist	1900-1931	See note 1
B3	12" Mortar	11' 9.5"	M1890MI		127	Watervliet	Mortar, M1896MI, #190, American Hoist	1900-1917	See note 2
B4	12" Mortar	11' 9.5"	M1890MI		135	Watervliet	Mortar, M1896MI, #184, American Hoist	1900-1931	See note 1
Source: RCW Form 1, 30 Sep 1921, CDSG, Berhow, Mark A. ed, American Seacoast Defenses: A Reference Guide, 2nd Edition, CDSG Press, McLean, VA, 2004, ISBN 0-9748167-0-1, pages 140-143, 212 Note 1: Mortars declared surplus and ordered disposed of 29 Aug 1931. CDSG Gun Card Collection from NARA Note 2: Mortars and carriages shipped to Fort Rosecrans Apr 1917. CDSG Gun Card Collection from NARA

Battery Laidley 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 mortars of Battery Laidley were not affected directly by the World War I redistribution but four of the mortars and carriages were removed and shipped to arm Battery Whistler at Fort Rosecrans. The reduction was part of a program to relieve crowding and improve efficiency in 12" mortar pits without significantly reducing rate of fire.

Current Status

Four mortars and carriages in place. The magazine rooms are in great shape and well labeled.

Context

Location: Fort De Soto, Florida
Lat: 27.615° Long: -82.736° Elevation: 12' Bing, Google, OldMapsOnline, USGS, OHM

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Sources:

• Coast Defense Study Group, CDSG Press, CDSG Digital Library

Picture Gallery

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  Battery Laidley M1890MI Mortar Front View
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  Battery Laidley M1890MI Mortar Side View
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  Battery Laidley Pit A Mortar #22
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  Battery Laidley Pit A Mortar #22
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  Battery Laidley Plotting Room
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  Battery Laidley Mortar #132
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  Battery Laidley Power Room
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  Battery Laidley Generator Pads
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  Battery Laidley Generator Radiator Room

Related:
American Hoist, Battery Whistler, CDSG, CDSG Gun Card Collection, Coastal Battery Gun List, Endicott Period, Fort De Soto, Fort Rosecrans, NARA, New and Updated Batteries, U.S. Civil War, World War I,