Battery AMTB 6 - Clatsop Spit

Battery AMTB 6 - Clatsop Spit (1943-1947) - Battery AMTB #6 Clatsop Spit was a World War II Period reinforced concrete Anti-Motor Torpedo Boat Battery located on Fort Stevens, Oregon. Construction on the Battery began 10 Jun 1943, was completed 30 Jun 1943 and the guns installed 24 Dec 1943. The Battery was activated on 12 Jan 1943 and officially transferred for use on 5 Apr 1944, total cost $9,856.82. The guns were removed after the end of World War II in 1947 or 1948.

Battery AMTB 6 - Clatsop Spit History

Battery AMTB #6 was built with two 90 mm M1 rapid fire guns mounted on type 90AA, model M3 carriages. These rapid fire guns had the dual roles of guarding against small swift motor torpedo boats and providing anti-aircraft protection.

Battery AMTB #6 Clatsop Spit Armament (edit list)

Empl No	Caliber Type	Barrel Length	Model		Serial No	Manufacturer	Carriage	Service Dates	Notes
1	90mm Rifle	186.15"	M1		7139	General Motors	Fixed 90mm M3, #219, General Motors	15 Dec 1943-1945
2	90mm Rifle	186.15"	M1		6927	General Motors	Fixed 90mm M3, #128, General Motors	15 Dec 1943-1945
M	90mm Rifle	186.15"	M1		3171	Watervliet	Mobile 90mm M1A1, #3821, WP&M	15 Dec 1943-1945
M	90mm Rifle	186.15"	M1		3531	Watervliet	Mobile 90mm M1A1, #1558, Watervliet	15 Dec 1943-1945
Source: 1. CDSG. 2. Berhow, Mark A. ed, American Seacoast Defenses: A Reference Guide, 3rd Edition - PDF, CDSG ePress, McLean, VA, 2012, ISBN 0-9748167-0-1, page 80-81, 218. 3. Rounds Fired - Seacoast Artillery Including Proofing Rounds, HQ Harbor Defense of the Columbia, undated, NARA RG165, E257 Box 68 - Bolling Smith.

Current Status

Only the wooden blocks where the guns were mounted remain.

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Location: On Fort Stevens, Oregon Maps & Images Lat: 46.228837 Long: -124.012213 Multi Maps from ACME Maps from Bing Maps from Google Elevation: 28.76'

Sources:

• Hanft, Marshall, Fort Stevens: Oregon's defender at the river of the West, Your Town Press, 1980

Links:

• Coastal Defense Study Group

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