Rio Hardy is the only river that still contains a little bit of water in the Colorado River delta. the small tributary is nothing more than a drainage ditch of the agricultural land in the Mexicali valley. It is artificially kept high by a small dam for recreational purposes and to sustain a tiny population of fishermen. The delta has hardly seen any Colorado water in the past 30 years. The 1.5 million acre feet of water that the USA delivers across the border into Mexico is completely used by cities like Tijuana and Mexicali. The majority, though goes into the irrigation of the vast agricultural area that covers the northern part of the delta. The line of agricultural fields slowly moves northwards though due to an increasing salinity of the area.