Are you close to an old road or railroad grade? Those really look like modern holes to me. They look really similar to how blasting holes are and we’re laid out for blasting.Are these modern holes or Spanish?View attachment 1999520
The holes are about 2"s
From Left to right depth is
5"
4"
3.5" with sand
Spacing is
A-B 7"
B-C 41"
A-C 48"
Mining would be included in that. I worked some old early CA gold rush mines with holes like that too.Are you close to an old road or railroad grade? Those really look like modern holes to me. They look really similar to how blasting holes are and we’re laid out for blasting.
The location needs to be researched as to its land use in the past. Is it within a historical mining district? That would allow for them to be associated with mining, but they're certainly not deep enough for blasting holes. Also, there are too many of them too close together to be considered mining claim validation holes.Mining would be included in that. I worked some old early CA gold rush mines with holes like that too.
They are in South Mountain Park but not nears any of these mines. attached picThe location needs to be researched as to its land use in the past. Is it within a historical mining district? That would allow for them to be associated with mining, but they're certainly not deep enough for blasting holes. Also, there are too many of them too close together to be considered mining claim validation holes.
What about other land uses nearby? Any sort of development around the site? Is it on public land? If private property, who has owned it over the years and what are their histories? Any controversies?
If there isn't an explainable plausible reason for the holes, then they were likely drilled for some private purpose that was known only by the driller. One obvious example would be that the holes are some sort of permanent marker. They don't seem to be laid out in a straight line to follow. Good luck.