The Arkansas Valley Super Ditch engineering report forecasts the need for an additional 50,000 acre-feet in the valley by 2050

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From The Pueblo Chieftain (Chris Woodka):

The conclusion is reached in an engineering report by Heath Kuntz prepared as part of the Super Ditch exchange case filed by the Lower Arkansas Valley Water Conservancy District in 2010.

The exchanges involve up to 58,000 acre-feet of water, 30,000 acres of ground, 82 exchange sites and seven ditch companies. So far, there has been no filing for a change of use of the water. Without a water leasing program like Super Ditch in place, there is the potential to permanently sell more farm water and take away flexibility to use the best farmland to grow crops, said Jay Winner, general manager of the Lower Ark district.

“Without the Super Ditch, I can see the day when the Ark Valley turns the clock back to the 1950s and we’re reduced to furrow irrigation,” Winner said. “In fact, I think the demand for water might be even higher than this report indicates.”

With the advent of surface-irrigation improvement rules in 2009, more replacement water will be needed as more systems in the valley are converted…

Well plans administered by three major groups now use about 24,500 acre-feet of leased water, and the engineering report projects that would increase to 30,500 acre-feet of water by 2050. In addition, the Arkansas Valley Conduit is expected to be constructed in the next decade, and its water demands will include 3,100 acre-feet from new sources to serve about 40 communities east of Pueblo. “The total projected demands associated with these operations are approximately 53,300 acre-feet per year in 2050,” Kuntz said in the report…

At its January meeting, the Lower Ark board heard from well associations that its lease of water from the Pueblo Board of Water Works, to help surface irrigators fill replacement needs, is raising the price others have to pay for augmentation water. The Pueblo water board typically sells water to bidders each year when the water is available. The price has been creeping up, as witnessed by the Fort Lyon Canal’s bid of $40 per acre-foot — twice its typical offer — in 2011. But the well groups argue that the $200 per acre-foot in the Lower Ark’s five-year contract takes water out of the pool available to them.

More Arkansas River basin coverage here.

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