Wm. Seymour Dam, located in Indianola, Iowa, is a privately owned structure designed by the USDA NRCS with a primary purpose of fire protection, stock, or small fish pond. Completed in 1981, this earth dam stands at 41 feet tall and spans 408 feet in length, creating a reservoir with a storage capacity of 37 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and is inspected, permitted, and enforced by state agencies to ensure its safety and compliance with regulations.

The dam, built on TR- Otter Creek, serves as a vital resource for water management and conservation in Warren County, Iowa. With a low hazard potential and a moderate risk assessment rating, the Wm. Seymour Dam plays a crucial role in mitigating flood risks and providing water for various purposes in the region. Despite not being rated for its condition assessment, the dam's design and construction by the Natural Resources Conservation Service reflect a commitment to sustainable water resource management and climate resilience.

As part of the Kansas City District, the Wm. Seymour Dam contributes to the overall water infrastructure in the area, offering fire protection and recreational opportunities while supporting wildlife habitats. The dam's location, surrounded by soil foundations and a drainage area of 0.11 square miles, underscores its importance in the local ecosystem and underscores the need for continued monitoring and maintenance to ensure its long-term functionality and safety for the community.