What was going on here?

Looking for interesting places to see near Regina, I found this site. It's near Valeport, SK (which seems to be more of a named place than an actual town) and I think it must be a site of industrial activity, possibly oil extraction. Any thoughts on on what this is?

I didn't find the site on the inventory of federal contaminated sites, nor on directory of current oil and gas wells (https://www.drillingmaps.com/Saskatchewan.html).

Location is
50°44'14.43"N
104°51'34.44"W