Located in Larimer, Colorado, Upper Stonewall is a privately owned dam on the North Fork Cache La Poudre River, serving primarily for irrigation purposes. Built in 1910, this Earth-type dam stands at a height of 10 feet with a length of 470 feet, providing a storage capacity of 65 acre-feet. With a low hazard potential but high risk assessment rating, Upper Stonewall has not been rated for its condition and lacks emergency action preparedness measures.

Despite being regulated by the state's Department of Water Resources (DWR) with permitting, inspection, and enforcement in place, Upper Stonewall's risk management measures and emergency response readiness are currently not documented. The dam's proximity to Fort Collins and its strategic location within the watershed highlights its importance in water resource management and climate resilience efforts. Enthusiasts and stakeholders in water resources and climate advocacy may find interest in monitoring the ongoing developments and enhancements needed for the safety and sustainability of Upper Stonewall.