Operation Mandrel

Operation Mandrel was a series of 53 nuclear test explosions conducted in 1969 and 1970. This test series included a 1.2 megaton "calibration shot" code-named Milrow, which was detonated 1220 m underground at Amchitka Island, Alaska, and the 40 kiloton gas stimulation experiment code-named Rulison, detonated near Grand Valley, Colorado

These tests followed Bowline and preceded the Emery series.

The individual blasts of this series were: