A Colorado reservoir is spilling over its dam for the first time in five years. Strontia Springs Reservoir is located six miles upstream of the mouth of Waterton Canyon outside of Littleton. Water is falling from the reservoir's dam about 290 feet down into the South Platte River below, where it will make its way to Denver Water treatment plants. The waterfall it creates is about the size of a 25-story skyscraper in downtown Denver. Denver Water said there are three reasons for this year's spill and it starts with a snowy winter. The snowpack in the mountains that feeds the reservoir peaked right at 100% of average. The second reason is there was quite a bit of water left over in the reservoir from last year. The snowpack didn't quite make it to average last year, but Denver Water said there was very little strain on the system thanks to a very rainy May and June in 2023. Strontia Springs Reservoir was still at 85% full when the snow season started in October. #colorado #waterfall #dam #watertoncanyon #littletoncolorado #denverwater #denver