Perth Observer just posted this video on the Oroville dam -

https://youtu.be/Iu9z6Xtl7GE

Has about astrophysics experiments done from an old mine in Oroville. But the science paper is pay-to-read ... (a HUNDRED BUCKS!) https://link.springer.com/chapter/10.1007/978-94-009-0541-2_13 Reply

short free summary -

Solar Cosmions

David N. Spergel

https://link.springer.com/chapter/10.1007/978-94-009-0541-2_13#page-1

"Several laboratories have begun an active experimental search for the solar cosmion. The UCSB-UCB-Saclay silicon **experiment in the Oroville mine **has already placed stringent limits on solar cosmions that couple to matter through spin-independent interactions..."

So we are looking around.

Some key words -

"UCSB-UCB-Saclay silicon experiment in the Oroville mine"

and

"Saclay experiment"

Here is a gizmo placed in the Oroville location -

http://media.gettyimages.com/photos/low-level-counter-used-in-a-solar-neutrino-experiment-is-placed-in-picture-id639357412?s=594x594

and we found this gem - says there's experiments from the underground power plant...

highly-segmented HPGe detector at the Oroville LowBackground counting facility ... [PDF]

http://absimage.aps.org/image/APR06/MWS_APR06-2006-000900.pdf

LOCATION

But that's not a "deep mine"... and there's lots of mines in Butte county where the dam is.

You can zoom in on this map - but the mines near the spillway have no ID names ... maybe when they are no longer active they lose the name (?) ....

http://www.us-mining.com/california/oroville/gold-mines

ugh! the dam is in Butte County - look at all these mines -

http://www.minecache.com/sitemap/california/Butte/