Located in Monona County, Iowa, the Nutt Hollow Subwatershed Site M-6842 is a local government-owned dam built in 1958 by the USDA NRCS. The dam's primary purpose is for fire protection, stock, and small fish pond, with additional functions including flood risk reduction. The earth dam stands at a height of 26 feet and has a storage capacity of 89 acre-feet, with a normal storage level of 32 acre-feet covering a surface area of 3.7 acres in the TR-MAPLE RIVER watershed.

Managed by the Iowa Department of Natural Resources, this dam is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and compliance with regulations. With a low hazard potential and a moderate risk rating, the Nutt Hollow Subwatershed Site M-6842 provides essential water resource management for the surrounding area. Although not currently rated for its condition assessment, the dam serves as a critical infrastructure for both water supply and flood control in the region.

In the event of an emergency, the dam's Emergency Action Plan is yet to be prepared, raising concerns about its readiness. However, with its designated purpose and functions, the Nutt Hollow Subwatershed Site M-6842 stands as a key component in the water resource management system of Monona County, Iowa, showcasing the importance of proper infrastructure for both environmental conservation and community safety.