I doubt they will be running the smelter on the weekend. Unlike the mill where it is easier to run it continuously than to stop and start production, the smelter is run one load at a time. Unless they have a large backlog of concentrate (not the 30k tons of partially processed ore), I would assume the smelter is probably only run during the week. Even the mill might seem quiet, since most of the workers would be inside. Same with the Sinker- I assume most of the work would be conducted during the week. Most of the pictures are taken on the weekends (thanks to BJ), so we rarely see work going on, just the changes that take place.