What would I need to build a nuclear bunker over 300ft underground?
Obviously an elevator or serious stairs plus a wench with clear space in middle to lower goods. Somehow you would have to guarantee ventilation or an oxygen supply which might be difficult if you are going that deep because of blast zone which would wipe out all structures on surface and remove all O2 from air and raise temps very high for several hours to days. You would have to have a very strong structure because in most parts of the country you would be below the water table and if the structure cracked you would have water flowing into the access (possible exception – if the 300 feet is gained by going sideways into a mountain) You would have to store sewage and have enough water and food to survive the time needed to stay for radiation to die off. You would need a generator with ventilation and radios of many frequencies in order to find out what had happened and what was safe.* Actually, 300 feet is absurdly deep. You would be far better off going not nearly that deep and puttin
