United States Nuclear Detonations Redefined as Nuclear Tests

Department of Energy

United States Nuclear Tests -- By Date

Operation Bowline
                   Date      Loca-
Test               (GCT)     tion  Type    Purpose          Yield Range
------------------ --------- ----- ------  ---------------- ---------------
Crew-2nd           11/04/68  NTS   Shaft   Weapons Related  Less than 20 kt
Crew-3rd           11/04/68  NTS   Shaft   Weapons Related  Less than 20 kt

Operation Mandrel
                   Date      Loca-
Test               (GCT)     tion  Type    Purpose          Yield Range
------------------ --------- ----- ------  ---------------- ---------------
Hod-C (Blue)       05/01/70  NTS   Shaft   Weapons Related  Less than 20 kt

Operation Toggle
                   Date      Loca-
Test               (GCT)     tion  Type    Purpose          Yield Range
------------------ --------- ----- ------  ---------------- ---------------
Flax-Source        12/21/72  NTS   Shaft   Weapons Effects  Less than 20 kt

NOTE:  Originally considered part of an announced test with multiple
detonations, but these detonations conform to the Threshold Test Ban 
Treaty test definition and are defined as additional tests.