The U.S. Nuclear Weapons Cost Study Project was completed in August 1998 and resulted in the book Atomic Audit: The Costs and Consequences of U.S. Nuclear Weapons Since 1940 edited by Stephen I. Schwartz. These project pages should be considered historical.
A view from the stern of an Ohio-class Trident submarine showing its open missile hatches.
The Navy currently deploys 20 Trident submarines from Bangor Naval Submarine Base in Washington state, and Kings Bay Naval Submarine Base in Georgia. Each submarine carries 24 missiles, either the Trident I/C-4 or the Trident II/D-5. Each missile carries on average five nuclear warheads (either the 100 kiloton W76 or the 475 kiloton W88), for a total of about 120 warheads per submarine. The Trident submarine costs about $1.9 billion apiece (not including missiles and warheads).
Credit: U.S. Navy (courtesy Natural Resources Defense Council)