Niacc Dam, located in Cerro Gordo County, Iowa, along the TR-IDEAL CREEK, was completed in 1973 and stands at a height of 24 feet and a length of 325 feet. Owned and regulated by the state of Iowa, the dam serves multiple purposes including recreation, fire protection, stock, and small fish pond. With a storage capacity of 65 acre-feet, the dam covers a surface area of 4 acres and drains a 0.05 square mile watershed.

Managed by the Iowa Department of Natural Resources, Niacc Dam has a low hazard potential and a moderate risk assessment rating. The dam is primarily an earth structure with a soil foundation and an uncontrolled spillway. It is designed for recreational activities and is inspected, permitted, and enforced by state regulatory agencies. The dam's location in Portland, Iowa, makes it a valuable resource for water recreation enthusiasts and climate conservationists interested in the sustainable management of water resources.

Despite its low hazard potential, Niacc Dam plays a crucial role in providing recreational opportunities and supporting local ecosystems in the area. With its historical significance and environmental impact, the dam serves as a reminder of the importance of responsible stewardship of water resources and the need for ongoing monitoring and maintenance to ensure the safety and sustainability of our natural surroundings.