ok, i think i found out- its the Elizabeth site, about a month before the guy started digging
https://mbasic.fac...19741489/?refid=17 it has me wondering how bad the damage is- i know they dug between the entry portal and the Intake structure,which appeared to be damaged in the investigation pictures, and the full length of the Antenna tunnel- there appeared to be parts of a tunnel junction in the scrap pile also