Square Lake Dam, located in Leavenworth, Washington, is a crucial part of the region's water management infrastructure. Built in 1938 for irrigation purposes, this rockfill dam on Prospect Creek stands at a structural height of 7 feet and has a storage capacity of 913 acre-feet. With a surface area of 500 acres and a drainage area of 1.2 square miles, the dam plays a vital role in regulating water flow and storage for agricultural use in the surrounding area.

Despite its importance, Square Lake Dam has been deemed to have a high hazard potential and poor condition assessment, requiring frequent inspections and maintenance. The last inspection in August 2018 highlighted the need for improvements to ensure the safety and functionality of the dam. Managed by a public utility, the dam is under the jurisdiction of the Washington Department of Ecology, which oversees its regulation, permitting, inspection, and enforcement to ensure compliance with state standards and guidelines.

As climate change continues to impact water resources, the maintenance and management of dams like Square Lake Dam become increasingly critical. With its historical significance and continued importance for irrigation and recreation, ensuring the safety and efficiency of Square Lake Dam is essential for water resource and climate enthusiasts alike.