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Cool spring, late storms fill C-BT Project
A cool and wet spring in Northern Colorado coupled by unusual late snowstorms combined to top off the Colorado-Big Thompson Project in 2019.
At Lake Granby, water reached the spillway over the weekend of July 13-14. In the days before that, managers had been releasing additional water into the Colorado River to make room for incoming snowmelt.
Because of a storm that dumped snow on the headwaters of the Colorado River on June 21, the inflow into Lake Granby climbed significantly. While earlier models had indicated Lake Granby wouldn’t fill, that storm boosted streamflows considerably.
Northern Water was not the only organization surprised by the late snowmelt and heavy late-season storms. Denver Water, which manages Lake Dillon and collects water at the headwaters of the Fraser River, reported the snowpack that feeds its system was also far above normal this year.