Dillon Reservoir operations update: The reservoir is down about three feet going into winter


From the Summit County Citizens Voice (Bob Berwyn):

Right now, the reservoir is about three feet below full, a level that enables Denver Water to place a big steel and wood cap on the glory hole.

In late November, the inflow from the tributaries that feed the reservoir was at about 93 cfs, while the outflow into the Blue River was about 88 cfs. Those flows are expected to fluctuate between a minimum required flow of 50 cfs and 105 cfs, sometimes dependent on downstream calls.

This year, the Roberts Tunnel, which transports water from the Blue River Basin under the Continental Divide to the South Platte River, was turned off in late November and will likely remain shut off until well into spring.

Steger said Denver Water is doing some maintenance on the valves at the eastern end of the conduit. But the tunnel itself will remain filled of water during the winter. It holds about 220 acre feet of water. Keeping it full enables Keystone to draw water from the Montezuma Shaft to augment Snake River flows during snowmaking season and also prevents the inside of the tunnel from icing up.

More Blue River watershed coverage here.

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