The construction crew on Cerro Pachón is making room for a shipment of 16 sections of steel track (embedded plates) which will sit on top of the lower enclosure pier and support the wheels that rotate the dome structure. The “lower enclosure” pier is the exterior pier (its excavation effort is almost done…see the trough in the accompanying image). The Telescope Mount Assembly (inner) pier is the one that just got poured during the recent all day/all night effort. The vertical rebar is the soon to be concrete cylinder which will go up almost 15 meters.