The location they have that's "well into construction" is SPARC, which is not intended to be a net power production facility. It will host their net gain demonstrator that they intend to have first plasma in next year and target a net gain demonstration in 2027.
ARC which they announced siting for and is intended to be their first grid-attached net power provider only just had the location selected so I don't believe its got much construction going on yet. The goal for that plant to be producing power is "early 2030s".
ARC which they announced siting for and is intended to be their first grid-attached net power provider only just had the location selected so I don't believe its got much construction going on yet. The goal for that plant to be producing power is "early 2030s".