Leach Flood #1, located in Canoa Ranch, Pima County, Arizona, is a privately owned earth dam completed in 1965 to reduce flood risks along the Duval Leach Wash. With a height of 36 feet and a length of 500 feet, this structure has a maximum storage capacity of 155 acre-feet and covers a surface area of 9.4 acres. The dam is regulated and inspected by the Arizona Department of Water Resources, ensuring its safety and compliance with state regulations.

Despite being classified as having a high hazard potential, Leach Flood #1 is in satisfactory condition according to a 2017 assessment. The dam's spillway, which is uncontrolled and 25 feet wide, can handle a maximum discharge of 410 cubic feet per second. The structure is designed to protect the surrounding area from flooding, with a drainage area of 1.9 square miles and a normal storage capacity of 135 acre-feet. With an updated inspection frequency of once a year, the dam is equipped to manage moderate risks associated with its operation.

As an essential component of flood risk reduction in the region, Leach Flood #1 serves as a vital infrastructure to safeguard the community from potential water-related disasters. Its strategic location, efficient design, and regular maintenance demonstrate a commitment to water resource management and climate resilience in Arizona's water infrastructure network. Enthusiasts of water resources and climate will appreciate the technical details and operational insights of this significant flood control structure.