Newby Dam, located in Steamboat Rock, Iowa, along the TR-Iowa River, was completed in 1965 by the USDA NRCS. This private dam serves multiple purposes, including fire protection and creating a small fish pond. With a height of 27 feet and a length of 824 feet, it has a storage capacity of 92 acre-feet and covers a surface area of 1 acre. Despite being uncontrolled, the spillway width is not specified, and the dam's hazard potential is rated as low.

Managed by the Iowa DNR, Newby Dam is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and compliance with regulations. The dam's condition is currently not rated, and it has not undergone any modifications since its construction. Although the risk assessment categorizes it as moderate, the risk management measures are not specified. Overall, Newby Dam provides essential water resource management functions while also supporting local wildlife and recreational activities in the area.