One thing that struck me during my September 2015 visit to Williston is the number of well pads with lots of pumps. Two years ago I was impressed by two or four pumps on one site. This trip, I noticed a lot of pads with 6 working pumps and lots of pads that were far too large for the one or two pumps in place. Obviously there are plans to put more wells on each of those pads.
The most amazing sight for me was a pad with 15 wells. Yes, 15. There are three in a row on the west side of the pad, six in a middle row, and six more in a row on the east. Will have several more shots of the site included in this post. The pad is at the end of a private road so all the pictures I have were taken from the nearby public roads.