I happened to stumble upon two of the borax haystack fields on my way out and back from The Cottonball Marsh. Here are a video and stills to document the haystacks as they existed in 2015 and 2017. Also included are images and comments by our very own Candace_66 and Gowergulch who added their expertise. Google Earth was a big help as well.
I do hope to make it out on the flats again soon and try to locate a few more of the haystack fields before they wash and blow away forever.