Larson Dam, located in Woodbury County, Iowa, serves multiple purposes including fire protection, stock maintenance, and small fish pond management. Completed in 1998, this earth dam stands at a height of 38 feet and spans a length of 460 feet. With a storage capacity of 66 acre-feet and a surface area of 3.6 acres, Larson Dam plays a crucial role in flood risk reduction for the surrounding area.

Managed by a private entity, Larson Dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its structural integrity. Despite being classified as a low hazard potential structure, the dam's risk assessment indicates a moderate level of risk. With a drainage area of 0.33 square miles and a controlled spillway, Larson Dam is equipped to handle potential flooding events while maintaining the safety of the local community.

Located on TR-Miller Creek in the city of OTO, Larson Dam is a vital resource for water management in the region. With its strategic design by the NRCS and successful operation since its completion, Larson Dam stands as a testament to effective water resource management and climate resilience in the state of Iowa.