If I were running the effort I’d take advantage of the winters and dig down using rings of pycrete (ice made from a slurry of water and wood pulp) posts hammered in and then pycrete walls with refrigeration coils formed around those to hold back the soil around the dig. Each ring smaller than the last. Then before spring really hits put the whole thing under a chilled dome to work under.
The advantage of pycrete is strength, low materials cost and dirt cheap / environmentally friendly disposal (unlike if you were having to break up concrete in a similar construction). Pycrete also melts very slowly and is easy to keep frozen.
It will be interesting to see what those new scans show, and what their course of action is.
Also, how many years, no, decades, have we seen programs on searching for-
Bigfoot
UFOs
Ghosts
What’s actually the reason for the Bermuda Triangle
on and on and on…..
I really think the Laginas are ont something here