North Poudre #2, also known as Demmel Lake, is a privately owned irrigation dam located in Larimer County, Colorado. Completed in 1955, this earth dam stands at a height of 33 feet and has a storage capacity of 4,450 acre-feet. With a surface area of 295 acres and a drainage area of 5 square miles, the dam plays a crucial role in water resource management along the Cache La Poudre River.

The dam has been modified several times over the years, with hydraulic and structural upgrades in 1955 and further improvements in 1990. Its spillway, with a width of 350 feet, is uncontrolled, allowing for the safe release of excess water during periods of high discharge. Despite being classified as having a high hazard potential, the dam's condition is assessed as satisfactory following the latest inspection in June 2020.

North Poudre #2 serves as a vital infrastructure for irrigation purposes in the region, impacting water availability and agricultural activities in the surrounding areas. With its strategic location and capacity to store water, the dam embodies the intersection of water resource management and climate resilience, highlighting the importance of maintaining and monitoring such structures to ensure the safety and sustainability of water systems in Colorado.