Certainly is a test area, but for rocket motors rather than warheads. The holes in a line are, as Tourist says, water holes - note the ones that have caved in north of the site. But also look at the blast marks from tied-down rocket motors in the site to the south of the site.
This is rocket city, not warhead testing.
That said, the last page or two has seen some really good analays. Well done you guys. Keep it coming.
