Colorado-Big Thompson Project update: Carter will fill Monday, Horsetooth at 88% #ColoradoRiver

Colorado-Big Thompson Project east slope facilities
Colorado-Big Thompson Project east slope facilities

From email from Reclamation (Kara Lamb):

On Monday, May 5, we will stop pumping water to Carter Lake. Carter is about 98% full and ready for the season.

Colorado-Big Thompson Project water that was going up to Carter will now go to Horsetooth. Horsetooth Reservoir is about 88% full and its water level is still rising.

Boat ramps are open.

From email from Reclamation (Kara Lamb):

apologize for a late evening notice. I’m on business travel and communicating across time zones.

This e-mail is to let you all know there are some changes coming to the river flow down the Big Thompson Canyon. Run-off is increasing and so will flows down the canyon, beginning Monday.

Currently, we are seeing run-off inflows up to 200 cfs at night. But, as you have read in previous e-mails, under Free River conditions, we have been able to divert some of that at Olympus Dam to Colorado-Big Thompson Project reservoirs like Carter Lake and Horsetooth Reservoir. This weekend, Free River conditions are ending.

As a result, we will no longer be able to pull some of the spring run-off flows native to the Big T coming into Lake Estes out of the river. Instead, the Big Thompson will resume its native outflow through Olympus Dam to the Canyon.

Currently, we are releasing about 35 cfs. Beginning Monday, May 5, we will start incrementally increasing the releases in several steps. The resulting flows down the Canyon by Monday afternoon could go up to about 140 cfs. It is possible there could be additional increases on Tuesday.

I will send an update on Monday. Meanwhile, please let me know if you have any related questions.

More Colorado-Big Thompson Project coverage here.

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