Frd No 1, also known as Frog Creek Watershed Dam 1, is a crucial piece of infrastructure in Osage, Kansas, designed by the USDA NRCS to serve as a flood risk reduction measure. Completed in 1964, this earth dam stands at 36 feet in height and spans 1380 feet in length, with a maximum storage capacity of 1192 acre-feet. Situated along the Frog Creek-TR river/stream, this dam plays a vital role in protecting the surrounding area from potential flood events.

Owned by the local government and regulated by the Kansas Department of Agriculture, Frd No 1 has a low hazard potential and is currently in a not rated condition assessment. With a moderate risk assessment score of 3, this dam is equipped with an uncontrolled spillway, 40 feet in width, to manage excess water flow during heavy rainfall. Despite its age, Frd No 1 continues to fulfill its primary purpose of flood risk reduction, safeguarding the community of Melvern and its residents from potential water-related disasters.