Colorado-Big Thompson Project update: Granby spill 50-50

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From the Sky-Hi Daily News (Tonya Bina):

To avoid a Granby Reservoir spill, which would mean increased flows running in the stretch of the Colorado River downstream from the dam project, the Bureau, working with the Northern Water Conservancy District, is diverting water to store wherever available until later this week, at which time it may cut back, depending on the continuance of warm weather and the volume of public need on the Front Range.

In the meantime, the agencies may raise the Granby spill gate one-tenth of a foot so that the elevation that triggers a spill is 8,279.80 rather than the protocol standard of 8,279.50, Lora said. The reason, he said, is to not lose “project water” for the “benefit of the public in Colorado.” If the spill does occur, “it will probably be very little,” Lora said. “It’s not going to affect anyone downstream; all the runoff is dying off.”

From email from Reclamation (Kara Lamb):

We are nearing full at Green Mountain Reservoir. With the snowmelt run-off finally slowing down and with operations out of Denver Water’s Dillon Reservoir going east, we are seeing inflow to Green Mountain decrease. As a result, we continue to curtail our releases. We will decrease releases to the Lower Blue later [Thursday] afternoon by 100 cfs, putting the Lower Blue at about 800 cfs. [Friday] afternoon, we will decrease again by another 100 cfs, putting the Lower Blue at 700 cfs. We will maintain the 700 cfs into the Fourth of July weekend, but it is possible it might drop some more. Please be sure to check the gage before you head up.

More Colorado-Big Thompson coverage here.

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