this post was submitted on 19 Jan 2024
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Large Hadron Collider could be an interesting candidate. Itβs not very visible, but itβs unique, gigantic, and insulated from damage
If abandoned I doubt it will remain insulated indefinitely, it would likely be underwater. A lot of random bits would survive though.
It's about 200m below the surface, but the surface is about 400m above sea level, so I don't think flooding is a major risk.
Cern has a risk assessment here :
Climate change might change that but it doesn't seem like long term flooding is a major risk even if abandoned.
Flooding would be catastrophic even today, but it is not uncommon for rainwater and groundwater to fill spaces over time. Most abandoned US missile solos are filled because of rain and it is not uncommon for old, abandoned bunkers to be filled too. If we're comparing it to an "ancient" structure it can add up.
The LHC currently uses sump pumps to deal with natural water infiltration. Without those pumps the water can collect in the space. There are also installed sources of water that could leak over time, such as for firefighting.