Operation Toggle

Operation Toggle
Toggle Diamond Sculls tunnel test chamber
Information
Country	United States
Test site	near Rifle, Colorado NTS Area 12, Rainier Mesa NTS Area 19, 20, Pahute Mesa NTS, Areas 1-4, 6-10, Yucca Flat
Period	1972-1973
Number of tests	28
Test type	underground shaft, underground tunnel
Max. yield	250 kilotonnes of TNT (1,000 TJ)
Test series chronology
← Operation Grommet Operation Arbor →

The United States's Toggle nuclear test series was a group of 28 nuclear tests conducted in 1972-1973. These tests followed the Operation Grommet series and preceded the Operation Arbor series.