The sheriff’s office says Green Mountain Reservoir, located along the Blue River, is sitting at just 23 percent of capacity. Drone footage shared by the sheriff’s office shows both the low water and the machine on the dry rock. Historic Low Water Across ColoradoThe find underscores how far Colorado’s water levels have fallen amid extreme drought. Falling reservoir levels have a habit of exposing old roads, foundations, vehicles, and other long forgotten objects. As the sheriff’s office put it, “While low water levels might not be the best news overall, it sure does make for some interesting finds.