Cox Hollow Number One, located in Governor Dodge State Park in Iowa, Wisconsin, is a state-regulated dam built in 1961 for recreational purposes. The dam, standing at 37 feet high with a controlled spillway, has a storage capacity of 1040 acre-feet and serves as a popular spot for outdoor activities. With a low hazard potential and fair condition assessment, the dam provides a safe environment for visitors to enjoy the surrounding Cox Hollow Creek and its 96-acre surface area.

Managed by the Wisconsin Department of Natural Resources, Cox Hollow Number One is inspected regularly to ensure its structural integrity and safety. Despite its very high risk assessment rating, the dam has not undergone any modifications in recent years and is considered to meet safety guidelines. In the event of an emergency, the dam is equipped with emergency action plans, although details about their preparation and revision are not specified in the available data. Overall, Cox Hollow Number One offers a picturesque setting for water resource and climate enthusiasts to appreciate the beauty of nature while enjoying recreational activities in the heart of Wisconsin's countryside.