Churches is a historic Earth dam located in Jefferson County, Colorado, specifically in the city of Arvada. Built in 1868, this dam serves primarily for irrigation purposes on the Ralston Creek-OS. Standing at 9 feet tall and 930 feet long, Churches has a normal storage capacity of 48 acre-feet and a maximum storage of 60 acre-feet, covering a surface area of 6 acres.

Despite its age, Churches has a low hazard potential and a moderate risk assessment rating. The dam is state-regulated and undergoes regular inspections and enforcement measures by the Colorado Department of Water Resources. The last inspection of Churches was conducted in January 1980, with an inspection frequency of every 6 years. Emergency action plans and risk management measures for the dam are currently not rated or prepared.

Water resource and climate enthusiasts will find Churches to be a fascinating piece of Colorado's irrigation infrastructure, showcasing the historical importance of dams in water management. With its serene location along Ralston Creek-OS and its low hazard potential, Churches stands as a testament to the engineering marvels of the past and the ongoing efforts to maintain and regulate water resources in the region. Its moderate risk assessment prompts further study and consideration for future management and conservation efforts in the area.