Around AD 1500, the lake was 26 times the present size of the Salton Sea. It has flooded and dried eight times between 1824 and 1905. In 1540 Spanish explorer Diaz was in the area, and by 1700 to 1750 the lake had infilled. Presently there is a "high ground" in Northern Mexico, of 23 feet, or 6+m. Thus a ship of 8 foot draft would need to have an additional 30 feet of water, above "sea level". While "king tides" of summer and winter are the highest, and conceivably a storm surge could add further water building up, wind-blown up the Sea of Cortez, 30 feet of additional depth seems highly unlikely.