70,000-Tonne Liquid Argon Neutrino Cryostat Model

Underwrite 1.5km deep underground cryostats maintaining 70,000 tonnes of liquid argon at 87 Kelvin with 1 part-per-trillion purity (recording 3D ionization tracks from supernova neutrinos and proton decay candidates). Model international physics research consortium funding leases ($48M/yr), and 25-yr IRR.