Atwell Dam is a private dam located in Lucas, Iowa, near Lake Morris. Completed in 1997, the earth dam stands at 30 feet high and stretches 410 feet in length, with a storage capacity of 143 acre-feet. Its primary purpose is for fire protection, stock, or as a small fish pond. The dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections and enforcement to ensure its safety and compliance with state regulations.

Situated on TR- Little Whitebreast Creek, Atwell Dam poses a low hazard potential with a moderate risk assessment rating. The dam's spillway is of the uncontrolled type, and it has not been modified since its completion. Although the condition assessment is currently listed as "Not Rated," the dam's risk management measures are not specified. Despite its low hazard potential, the dam is equipped to handle emergencies, although details on emergency action plans and inundation mapping are not provided in the available data.

Water resource and climate enthusiasts may appreciate Atwell Dam for its role in providing essential fire protection and water storage in the area. With its location in a picturesque setting near Lake Morris, the dam serves as a vital resource for the community while also presenting opportunities for wildlife habitat and recreational activities. As a privately owned structure, Atwell Dam plays a significant role in water management and conservation efforts in Lucas County, Iowa, offering a glimpse into the intersection of human infrastructure with natural landscapes.