Lake Lashane Dam, located in Lamoni, Iowa, was completed in 1954 by the Stanley Engineering Co. The dam stands at a height of 30 feet and has a length of 1000 feet, creating a reservoir with a normal storage capacity of 559 acre-feet. The dam's primary purpose is water supply, serving as a crucial resource for the local community.

Managed by the Iowa Department of Natural Resources, the Lake Lashane Dam is regulated, inspected, and enforced by state authorities to ensure its structural integrity and safety. With a significant hazard potential but a satisfactory condition assessment, the dam poses moderate risks that are continuously monitored and managed by relevant agencies. In the event of an emergency, the dam has established protocols for risk assessment and response.

As a key structure on TR- Shane Creek in Decatur County, Iowa, Lake Lashane Dam plays a vital role in water resource management and climate resilience efforts in the region. With its uncontrolled spillway and soil foundation, the dam serves as a critical infrastructure for water supply while also providing recreational opportunities and environmental benefits to the local community and wildlife.