The Colorado River is not meeting its obligations. Its Lake Powell bank account is in danger of running dry. A 97-year-old agreement demands that the river deliver 5.2 trillion gallons of water to seven states and Mexico each year. That isn’t happening, and now — in the age of climate change — the chance of ever meeting that demand is fading. As a result, Utah’s plan to take more of its Colorado River water — by building a pipeline from Lake Powell to St. George — may be fading, too.