Apache Lake Reservoir, located in Larimer, Colorado, is a privately owned water resource managed by the Colorado Department of Water Resources. Built in 1980, this Earth dam stands at 20 feet high and stretches 840 feet in length, with a storage capacity of 211 acre-feet. The reservoir primarily serves irrigation purposes, drawing water from the Columbine Creek-TR river/stream.

Despite its low hazard potential and satisfactory condition assessment, Apache Lake Reservoir poses a high risk due to its location and design. With a maximum discharge capacity of 1258 cubic feet per second and a surface area of 17 acres, the reservoir is vital for water management in the region. Its state-regulated status ensures consistent inspection, enforcement, and permitting for safe operation. For water resource and climate enthusiasts, Apache Lake Reservoir offers a captivating example of sustainable water use and regulation in a crucial irrigation setting.