Patterson Dam, located in Indianola, Iowa, is a privately owned structure designed by USDA NRCS and completed in 2018 for grade stabilization purposes. The dam stands at a height of 32 feet and spans a length of 447 feet, with a storage capacity of 57 acre-feet and a surface area of 4 acres. It serves multiple purposes, including grade stabilization, recreation, and water supply for the surrounding area.

Managed by the Iowa DNR and regulated by the state, Patterson Dam has a low hazard potential and is currently not rated for its condition assessment. Despite its moderate risk level, the dam has not been modified since completion, and its emergency action plan status and risk management measures remain unreported. With a spillway width of 20 feet and uncontrolled outlet gates, the dam plays a crucial role in managing water resources in the region and ensuring the safety of downstream communities in the event of a flood or emergency situation.

As a key infrastructure in the tributary to Squaw Creek, Patterson Dam contributes to the overall resilience of the water management system in Clarke County, Iowa. With its strategic location and design, the dam plays a vital role in mitigating erosion, providing recreational opportunities, and supporting water supply needs. Continuous monitoring and maintenance efforts are essential to ensure the long-term effectiveness and safety of Patterson Dam for both water resource and climate enthusiasts in the region.