Canon No. 4, located in Albany County, Wyoming, is a privately owned Earth dam constructed in 1959 for irrigation purposes on Timber Canon Creek. With a height of 34 feet and a length of 370 feet, this dam provides a storage capacity of 77 acre-feet, with a normal storage level of 51 acre-feet. The dam's spillway type is uncontrolled, with a width of 24 feet, and it has an outlet gate valve for water release.

Despite being classified as having a low hazard potential and fair condition assessment, Canon No. 4 is subject to regular inspections every five years, with the last assessment conducted in June 2020. The risk assessment for this dam is moderate (3), indicating a need for ongoing monitoring and potential risk management measures in place. With its strategic location in the city of Torrington and its vital role in irrigation, Canon No. 4 serves as a crucial water resource structure in the region, regulated by the Wyoming State Engineer's Office.

Water resource and climate enthusiasts will be intrigued by Canon No. 4's unique characteristics, including its stone core and soil foundation, as well as its moderate risk assessment level. With its historical significance dating back to the late 1950s, this Earth dam continues to play a vital role in water storage and distribution for agricultural purposes in Wyoming. As climate change impacts water resources, understanding the condition and maintenance of structures like Canon No. 4 is essential for ensuring the sustainability and resilience of water infrastructure in the face of changing environmental conditions.