Machine drilling for fresh water

I've been seeing this machine around the north side of the island drilling for "fresh water" and it. is. Intriguing!?!? Like some old steam locomotive. The brand Eucyrus-Erie was in existence from 1927 to 1996 (and then Caterpillar bought it) I'm guessing this old time is closer to the first year than the latter´┐Ż Photos by San Pedro Scoop