Lake Ponderosa Dam, located in Poweshiek County, Iowa, is a vital water resource managed by the local government. Built in 1969 by THOMPSON WILLIS & CO., this Earth dam stands at a towering height of 50 feet and spans a length of 1090 feet, creating a reservoir with a normal storage capacity of 2500 acre-feet. The dam serves multiple purposes including recreation, with a surface area of 290 acres and a drainage area of 6.56 square miles, making it a popular spot for outdoor enthusiasts and water recreation activities.

Despite its high hazard potential, Lake Ponderosa Dam has been assessed to be in satisfactory condition, ensuring the safety of nearby residents and the surrounding ecosystem. The dam is regulated by the Iowa Department of Natural Resources, with regular inspections conducted to maintain its structural integrity. The presence of an uncontrolled spillway with a width of 4 feet further enhances the dam's ability to manage water flow during times of high discharge, reducing the risk of flooding downstream. With its strategic location on TR-MOON CREEK and the support from local government ownership, Lake Ponderosa Dam stands as a testament to effective water resource management and climate resilience in Iowa.