Trull Creek #1 is a private irrigation dam located in Routt, Colorado, along the Trull Creek river. Built in 1972 by the USDA NRCS, this earth dam stands at 34 feet in height and has a storage capacity of 270 acre-feet. With a primary purpose of irrigation, it also serves for fire protection, stock, and small fish pond purposes. The dam covers a surface area of 17 acres and has a drainage area of 8 square miles, with a maximum discharge capacity of 1450 cubic feet per second.

Despite being classified as having a low hazard potential, Trull Creek #1's condition is assessed as fair as of the last inspection in October 2018. The dam has a spillway width of 50 feet and is uncontrolled, with no associated locks. While the risk assessment indicates a moderate level of risk, appropriate risk management measures are not specified in the available data. Overall, Trull Creek #1 presents an interesting case study for water resource and climate enthusiasts, showcasing the intersection of private ownership, regulatory oversight, and the critical role of dams in sustaining agricultural activities in the region.