Larsen Dam, located in Neola, Iowa, was completed in 1959 and is primarily used for fire protection, stock, and as a small fish pond. Owned privately, the dam stands at 38 feet high and spans 816 feet in length, with a storage capacity of 122 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and is inspected regularly to ensure its safety and compliance with state regulations.

Situated on the TR-Mosquito Creek, Larsen Dam has a low hazard potential and is considered to have a moderate risk level. The dam's spillway is uncontrolled, and it has not been modified since its completion. Although the dam's condition has not been rated, it meets guidelines for emergency action plans and risk management measures. Despite its age, Larsen Dam continues to serve its intended purposes effectively while maintaining a moderate risk profile.

Water resource and climate enthusiasts interested in Larsen Dam will find it to be a well-maintained structure with a specific focus on fire protection and agricultural needs. The dam's location in Pottawattamie County, Iowa, provides essential water storage and management capabilities for the surrounding area. With its low hazard potential and moderate risk level, Larsen Dam exemplifies the importance of proper dam maintenance and regulatory oversight in ensuring the safety and functionality of water infrastructure in a changing climate.