Here's a longshot to investigate;
There WAS a screen / hand dig 3 or 4 yrs ago on 12.
I have no record of the contact but it was about 3 1/2 miles S of the light at 290..going S, it's on the right. It's always been a high dollar exotic game hunting ranch, maybe they have a sign with a phone # at the gate. We just called it " Ken's" who was the ranch foreman at the time.
The owners were not adverse to have people on the property so it would be a good place to surface hunt
and possibly get a lead on other adjacent ranches that would allow visitors.