It's 4x deeper than Cheyenne Complex designed to survive direct hits from much more high yield Soviet nukes (to compensate for accuracy). I don't remember the c

It's 4x deeper than Cheyenne Complex designed to survive direct hits from much more high yield Soviet nukes (to compensate for accuracy). I don't remember the course details, but US nuke modernization efforts is trying to improve detenation timing/penetration (not yield) for more effective bunker busting. IIRC there was some rough numbers attached to improved effective depth, but it was measured in 100s of feet.