[dr_lew]

Thanks. I had actually found this spot, but I had a lower contrast, I think, so I didn’t recognize it. I thought the dark spot above the point labeled “Portal” in your included image looked like a “pit”, possibly created by a collapse.

[TXnMA]

The collapse site is a couple of miles away -- up on the upper slopes of the mountain. Think about it: the test has to be deep inside the mountain, at the end of a L O N G (sealed) tunnel -- nowhere near the portal.

Not sure I have the collapse site placemarked, but, i'll check.

Are you able to handle KML files? I might be able to put a KML file of placemarked Nork NTSite features in a folder on my domainserver for you to pick up via FTP...

TXnMA