Legal appropriation of the head of this old water way was made and Crismon was left behind, with a couple of the Camp Utah men as helpers, to start work on the new irrigation project. Incidentally, Crismon made location of land near the heading and thus separated his interests from those of the main party. Later, he started a water-power grist mill on the Grand canal, east of Phoenix. He had rights to a large share in the canal, as well as to lands on the mesa. These he later sold. Robson, Pomeroy and Sirrine returned to the Verde Valley, to pilot the rested travelers southward. The journey was by way of the rocky Black Canyon road, with difficulty encountered in descending the steep Arastra Creek pass. Fording Salt River at Hayden's Ferry, Camp Utah was reached February 14, 1878. The journey had been a slow one, for cattle had to be driven. A few days were spent at Camp Utah and then the new arrivals moved upstream five miles, where tents were pitched on a pleasant flat, a couple of miles below the canal heading. There had been conclusion to settle upon the tableland to the southwest. Pomeroy and Sirrine made a rough, though sufficient, survey with straight-edge and spirit level, along what then was named the "Montezuma Canal," eleven miles to a point where a townsite was selected. Use of a Prehistoric Canal Nothing short of Providential was considered the finding of the canal, dug by a prehistoric people into the edge of the mesa, which it gradually surmounted. This canal, in all probability, had been cut more than 1000 years before. It could be traced from the river for twenty miles, maintaining an even gradient, possibly as good as could have been laid out with a modern level, and with a number of laterals that spread over a country about as extensively cultivated as at present. A lateral served the Lehi section and other ditches conducted water to the southwest, past the famous ancient city of Los Muertos (later explored by Frank H. Cushing) and then around the southeastern foothills of the Salt River Mountains to points not far distant from the Gila River. The main canal cut through the tableland for two miles, with a top width of even fifty feet and a depth of twelve feet, chopped out in places, with stone axes, through a difficult formation of hardpan, "caliche." The old canal was cleaned out for the necessities of the pioneers, at a cost of about $48,000, including the head, and afterward was enlarged. At the time, there was an estimate that its utilization saved at least $20,000 in cost of excavation. There were 123 miles of these ancient canals.