We have some advantages in metallurgy for the next couple of years. The power plant has an engineer with metallurgy training (he's called the Performance Engineer), and the power plant also owns a ThermoMeasureTech MetallurgistXR xray fluorescence alloy identification system, which will have enough Fe55 and Cd109 energy sources to last until about 1635 with acceptable precision of measurement. This means we can assay elements from about atomic number 20 and above. Can't do carbon, though. Some creative use will permit some pretty hot metallurgy. But when it craps out we can't replace it, and there is only one.
In addition there is a copy of McMaster on Materials (Lois' dad, BTW) at the power Plant, as well as about a dozen Machinery's Handbooks of various vintages.
Another thing we do have is several people with professional working knowledge of instrumentation and control at the mine, at the power plant, and at the water and waste treatment plants. There are also textbooks on the subject at the graduate engineer level at the mine, power plant and treatment plants.