Cyrus Reservoir, also known as Keith Cyrus Dam, is a private water resource located in Deschutes, Oregon, along Squaw Creek. Completed in 1968, this earth dam serves primarily for irrigation purposes, with a maximum storage capacity of 80 acre-feet and a normal storage capacity of 113 acre-feet. The reservoir covers a surface area of 7.7 acres and has a drainage area of 0.7 square miles. Despite its low hazard potential, Cyrus Reservoir is regulated, inspected, and enforced by the Oregon Water Resources Department to ensure its safety and compliance with state regulations.

With a dam height of 17 feet and a hydraulic height of 13 feet, Cyrus Reservoir stands at the intersection of water resource management and climate resilience in Oregon. The dam spans 1640 feet and has a structural height of 15 feet, providing essential water storage capacity for irrigation activities. The reservoir's location in a rural area without downstream settlements further emphasizes its importance for sustaining agricultural practices and water supply in the region. Despite not being federally owned, Cyrus Reservoir plays a crucial role in supporting the local economy and ecosystem through its efficient water management.

As water resource and climate enthusiasts continue to monitor and assess the state of water infrastructure across the country, Cyrus Reservoir stands out as a reliable and well-maintained irrigation reservoir in Oregon. With a history of effective operation and a focus on safety and regulatory compliance, this private water resource serves as a model for sustainable water management practices in the region. Its low hazard potential, combined with its significant storage capacity, highlights the essential role that Cyrus Reservoir plays in supporting agricultural activities and ensuring water security in Deschutes County.