Logan

Operation Hardtack II

October 16, 1958 · Nevada Test Site (NTS) · Tunnel · 5 kt

A nuclear device exploded at the end of a long horizontal drift mined into a mountain or mesa.

Color dye transfer photograph of the venting cloud of Shot Logan, 16th nuclear detonation of Operation Hardtack II, tunnel shot at 284 metres depth, Area 12, Rainier Mesa, Nevada Test Site, 16 October 1958. UCRL ABM warhead development test, 5 kt. Colorage Inc., Burbank, California, File No. 98-80. AEC official photography, declassified.
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Atomic Energy Commission (U.S.A.E.C.)

Printed in 1958

Dye transfer

8x10 in (20.3x25.4 cm)

Handwriting, Stamp

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Shot Logan was the 16th nuclear detonation of Operation Hardtack II, fired on 16 October 1958 in a tunnel at 284 metres depth in Area 12 of the Nevada Test Site — the mountainous Rainier Mesa region. It was a UCRL test of a small kiloton-range device intended as an ABM warhead, producing 5 kilotons within its predicted range of 3–7 kt, and was declared successful. The device was exceptionally compact: 28 centimetres in diameter, 29 centimetres long, weighing 28.6 kg. This photograph was produced by Colorage Inc. of Burbank, California — the specialized dye transfer printing laboratory contracted by the AEC

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