Bringing more certainty to an unruly and unpredictable Colorado River system was a common theme among water managers speaking at the Colorado River District’s annual seminar on Friday, Sept. 15­­. Although the drought that has gripped much of the Colorado River basin for the past 16 years has eased up a bit, population growth and the long dry spell have pushed the river’s supplies to the limit, with every drop of water in the system now accounted for.