Twin Lakes Reservoir, located in Larimer County, Colorado, is a vital water supply source owned by the local government and regulated by the Colorado Department of Water Resources. The reservoir, completed in 1998, has a storage capacity of 419 acre-feet and serves the primary purpose of water supply. With a significant hazard potential but a satisfactory condition assessment, the dam is designed as an earth type structure with stone core and rock foundation, standing at a height of 35 feet and a length of 245 feet.

Situated on the South Fork Cache La Poudre River, Twin Lakes Reservoir plays a crucial role in water management in the region, with a maximum discharge capacity of 3560 cubic feet per second. The spillway, of uncontrolled type with a width of 72 feet, aids in managing water levels during peak flow periods. The dam features a slide (sluice gate) outlet gate and is inspected biennially to ensure its safety and functionality.

As climate change impacts water resources, Twin Lakes Reservoir stands as a key infrastructure for water supply in Fort Collins, providing a moderate risk management measure with emergency action plans in place. With its strategic location and essential role in the local water system, this reservoir is a significant asset in sustaining water resources in the dynamic environmental conditions of Colorado.