Here's what the observatory looked like in 2015 (image credit: Rubin Observatory/NSF/AURA)
@1dalm Over Over 5,000 cubic meters of concrete had to be poured https://www.lsst.org/news/lsst-construction-%E2%80%93-above-ground-pach%C3%B3n
@megschwamb That volume of concrete is not that impressive.
That volume of concrete in that location is very impressive. Do you know if they had to procure a special mix for the altitude?
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