It houses the wellhead, but I had to open it and check.
Often I come by stuff, and say wtf? Then I think a second more and ask, wtf we’re they thinking? Then another second, wtf with all the effort, and still wtf? Then another second is needed to just shake my head and walk away.
tom
P.S. wtf = what’s this for. 
One time I opened the housing for the well and found 14 electrical concerns. I had almost disclaimed the building…