All of the designs were taken from real petroglyphs and runes. All of them were made by hand in 2020 by one of our board members. The flagstones were part of a deconstructed patio/sidewalk that was dumped at the dam site. A local 501c3 cleaned up the dumped load, and instead of sending the flagstone pieces to the dump, it was decided that it would be put to use to help us raise money for the visitor’s center at the St. Francis Dam site. The idea to make the faux petroglyphs and runes was hatched. Because these are recycled chunks of flagstone, there may be some cement noticeable on the piece, stains, or other stuff that may have dropped upon it when it was a patio. Note: We cannot tell you where the real petroglyphs are located.8U.