In 1972, the El Paso Archaeological Society (EPAS) and the Anthropology Club of the University of Texas at El Paso (UTEP) systematically documented the drawings, their current conditions and sometimes relocated and inspected the rock art. The project discovered 300 previously unrecorded pictographs. The findings of their work was published in "A Rock Art Inventory at Hueco Tanks State Park" (1974). In 1988, park ranger Dave Parker and archeologist Ron Ralph plotted the location of all known pictographs. A digital database of the art and its GPS coordinates was started in 1999 with Robert Mark and Evelyn Billo.