Future of Colorado River to be debated today

Top water decision-makers from seven Western states plan to join conservation groups and Indian tribes in San Diego today to begin hammering out rules for squeezing every usable drop from the overtaxed Colorado River.

The work meeting hosted by federal water managers comes amid dire predictions for the waterway. The U.S. interior secretary five months ago issued a call to arms and declared that the river already described as the most plumbed and regulated in the world would be unable to meet demands of a growing regional population over the next 50 years.

“We’re looking at a very significant chance of declaring a shortage in the Colorado River basin in 2016,” Michael Connor, commissioner of the Bureau of Reclamation, said in an interview in advance of the conference.

Connor heads the federal agency responsible for what he called the most litigated and fought-over resource in the country. He said data projects 2013 will be the fourth-driest year in the Colorado River basin over the past 100 years. Last year was the fifth-driest year on record.

The river provides drinking water, power and recreation for some 40 million people in California, Arizona, Colorado, Nevada, Utah, New Mexico and Wyoming. Its largest reservoirs — Lake Mead near Las Vegas and Lake Powell near Page, Ariz. — are projected to drop to 45 percent capacity by September, Connor said.

Mexico also has a stake in the river, and U.S. and Mexican officials signed a pact in November for new rules on sharing Colorado River water, including a deal that lets Mexico store water in Lake Mead. The deal provides for international cooperation to ensure that river water reaches the Gulf of California for the first time in decades.

Anne Castle, assistant interior secretary for water and science, called today’s conference the start of a “next steps” process.

Castle said she hopes more ideas and practical solutions will surface to deal with shortages predicted by a study released by the bureau in December.

The report looked at supply and demand of Colorado River Basin water. It said that by 2060, with the Southwest’s population expected to swell, the river won’t be always able to serve all the residents, businesses, ranchers, Native Americans and farmers who rely on it.

When the Colorado River was tamed by dams and canal water allocations were made nearly a century ago, agricultural interests gained broad water and irrigation rights that helped transform California’s vast arid Imperial Valley east of San Diego into one of the most productive winter fruit and vegetable, cotton and grain farming regions in the country.

Tension has grown in recent years along with the sprawl of thirsty cities including Denver, Los Angeles, Las Vegas and Phoenix.

A key concern in southern Nevada is the water level of Lake Mead — already marked in some places by 100-plus feet of white mineral “bathtub ring” showing the effect of years of drought. The reservoir is Las Vegas’ major source of drinking water.