Tuesday, July 5, 2011

Granby Dam spillway water to taper off

We're continuing to reduce releases from Lake Granby this week. By Friday, water will no longer be going over the spillway; releases will only be coming out of the valves, which is where we normally make releases. We'll have 430 cfs coming out of the valves until re-evaluating the situation next week.

This spill was successful because it evacuated enough water so we could capture the peak inflow to the reservoir.

We expect to have a second spill as the reservoir approaches full capacity. It will be shorter and involve less water over the spillway. Operating the dam this way will allow us to gently fill the reservoir to the top while preventing the need to make large releases below the dam.