Comment by Animats

This crypto mine in Google Earth.[1]

What looks like a crypto mine is in the upper left. Notice the new tent-like structures. some under construction, all the air-handling equipment, and the huge busbars of the power distribution system. Also notice the active parking lot.

The big plant at the lower right is a defunct Alcoa aluminum refining operation, sold in 2021. It looks like two of the long buildings that formerly housed aluminum electrolysis operations have been converted - they have what looks like air handling equipment outside and there is an active parking lot nearby.

The large substation to the northeast of the mining farm is left over from the Alcoa era. So heavy power was available at that site.

[1] https://earth.google.com/web/search/Rockdale,+TX/@30.5699918...