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So much happens between flyovers. At the OLM they are hammering in sheet piles, excavating around the columns they poured, adding a layer of rock, pouring a thin concrete slab leveling the ground, cutting the columns flush with the slab. Once that is all done it looks like a 6-8 foot thick rebar cage will go in for a thick slab that will support the water cooled steel sandwich.
This picture shows the preliminary work done on the right and in progress on the left. Since then more sheet piles were added completing the pit and excavation resumed to get down to the depth where they will add the rocks.
