These people are idiots. Work with the County, and/or neighboring counties. Identify a spot in the desert. Move the turtles. Dig a big hole. Dump it there. Cover it up. Plant some cactus and bring the turtles back. End of story.
Funny enough- that’s exactly what we did with the dilapidated remains of my grandmas old house that was an eyesore.
Plenty of desert to make a hole and fill it up.