We returned to the swallets on Spring Creek to investigate further, hoping to find more, and perhaps better document the features we had seen there two weeks before (see this blog post: http://chuck-sutherland.blogspot.com/2015/07/unusual-karst-on-spring-creek-in.html ). Things had changed considerably for a few of the swallets, cementing in our minds just how dynamic the karst and streams are of the Spring Creek system.