Plagge Dam, located in Mapleton, Iowa, is a privately owned structure designed by the NRCS for fire protection, stock, or small fish pond purposes. Completed in 1998, this earth dam stands at a height of 36 feet with a length of 559 feet, providing a storage capacity of 62 acre-feet. The dam, situated on TR- Heisler Creek, serves low hazard potential with a moderate risk assessment rating of 3.

Managed by the Iowa Department of Natural Resources, Plagge Dam is state-regulated and permitted for inspection, enforcement, and operation. With its uncontrolled spillway and soil foundation, the dam offers a surface area of 4 acres and a drainage area of 0.25 square miles. Despite being in good condition and not yet rated for assessment, the dam presents a vital resource for water conservation and wildlife habitat in the Monona County region.

Water resource and climate enthusiasts can appreciate Plagge Dam for its strategic placement, efficient design, and contribution to local water management efforts. As a key feature in the Rock Island District, this earth dam serves as a valuable asset for fire protection, livestock watering, and ecological enhancement along TR- Heisler Creek. With its low hazard potential and moderate risk assessment, Plagge Dam stands as a testament to responsible water infrastructure development and sustainable resource utilization in the state of Iowa.