This is the southernmost hut (aka lean-to) on the AT in Shenendoah National Park (Calf Mountain Shelter is just south of the official boundary) and about 20 miles north of Rockfish Gap.
This is an old shelter with a rock foundation, located in a small little valley 0.3 miles off the Trail. We stopped in for dinner and found out that the spring was dry and there was no more water until Rockfish Gap. We had started out with perhaps 2.5 liters each, so we determined that we could just make it if the weather stayed cool and we reach Rockfish Gap in 2 days instead of 2.5. It was already 3:30 and sunset came at 6:45, so we grabbed a cold dinner and punched out another 7 miles to just past Wildcat Ridge, turning an easy first 3 days into a much tougher re-introduction to the Trail (consecutive 14-, 13-, and 21-mile days). It's amazing at how thirsty you get when you know that you have to ration your water.
When water is scarce, I recommend that you cache water at Turks Gap to the south, about halfway between Rockfish Gap and Loft Mountain Campground. Alternatively, given enough light, the 27 miles of trail are easy enough for a fit hiker to cover in one long day.