#Snowpack/#Runoff news: @Northern_Water declares a 70% quota for the 2019 season #ColoradoRiver #COriver

Lake Granby spill June 2011 via USBR. Granby Dam was retrofitted with a hydroelectric component and began producing electricity earlier this year as water is released in the Colorado River.

From The Loveland Reporter-Herald (Sam Lounsberry):

Unit owners of the Colorado-Big Thompson project, which delivers Colorado River water from the wet Western Slope to the dryer Front Range, will get 70% of their quota this year, according to a Northern Water news release.

The 70% allocation means that a farmer who owns 10 acre-feet of Colorado-Big Thompson water will get seven in a year, with the remaining three kept in storage for use in dry years…

In wet years like this one, Northern sometimes downsizes the quota of Colorado-Big Thompson water distributed, since native streams can be full enough to provide farmers late-season growing supply, which provides Northern a storage opportunity for use in dry years.

But the move to boost the Colorado-Big Thompson quota from 50% — the level normally set at the start of Northern’s water year in November just to get users through the winter so snowfall can inform spring allocation rates — ensures farmers will have a more flexible late growing season.

The quota increases available Colorado-Big Thompson water supplies by 62,000 acre-feet from the initial 50% quota made available in November…

The snow-water equivalent mark for the Upper Colorado Basin is 120% of the normal median as of Thursday, according to the U.S. Bureau of Reclamation, with snowpack levels in other river basins across the southwest at even higher marks. But KUNC and The Aspen Times reported this year that despite the good snowfall this winter, officials predict spring runoff won’t be enough to replenish reservoirs across the southwest, because years of drought have left dry soil that sucks up extra drops.

“Modeled soil moisture conditions as of November 15th were below average over most of the Upper Colorado River Basin and Great Basin,” the Colorado Basin River Forecast Center stated in its April 1 report. “In the Upper Colorado River Mainstem River Basin, soil moisture conditions were below average in headwater basins along the Continental Divide, and closer to average downstream.”

Water from the Colorado-Big Thompson project supplements other sources for 33 cities and towns, 120 agricultural irrigation companies, various industries and other water users within Northern Water’s 1.6 million-acre service area, across parts of eight counties, the Northern release said.

Westwide SNOTEL basin-filled map April 11, 2019 via the NRCS.

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