A wet spring has most of Denver Water’s supply reservoirs filling and spilling, and officials say Dillon Reservoir, a major supplier for drinking water on the Front Range, is getting ready to overflow.

Dillon Reservoir is currently at 99% of its capacity, and Denver Water officials say they expect it to spill in the next couple of days as they reduce flows as part of a plan to get the reservoir to fill now that heavy snowmelt is starting to wane. The flows peaked at just over 1,400 cubic feet per second as officials allowed the water to release into the Blue River as above-average snowpack melted off this spring.

The water basin surrounding the reservoir peaked at 124% of average this year, which is three weeks later than normal, after a slow start to the snow year.

“This late peak, coupled with reduced demand for water from Denver Water customers, translates to higher stream flows in warmer months, as well as more water for rafting and higher elevations in our reservoirs later into the summer,” Denver Water officials wrote in an update published Monday, June 24.

Outflow onto the Blue River is expected to remain steady between 500 and 700 cubic feet per second over the coming week. Officials say the outflow may increase after that as the reservoir begins to spill.

With outflows of 500 cubic feet per second needed to operate commercial rafting, many guides were excited about this year’s local rafting season on the Blue River north of Silverthorne. While flows are expected to lessen in the coming days and weeks, public safety officials have been warning rafters and people recreating near the water to use caution and adhere to water safety measures.