I think that neither is compacting trash that much a problem that you need a huge granite block for that (hydraulic press should be sufficient), nor do you want

I think that neither is compacting trash that much a problem that you need a huge granite block for that (hydraulic press should be sufficient), nor do you want to move a block of granite 1km in diameter more than necessary. The idea by Heindl was to cut the granite cylinder in the place where the plant is build.