Located in Necedah, Wisconsin, Rynearson Dam No. 1 is a Federal-owned structure designed by the US Fish and Wildlife Service for the primary purpose of serving as a Fish and Wildlife Pond. Completed in 1939, this earth dam stands at a height of 24 feet and stretches 1145 feet in length, with a maximum storage capacity of 10,292 acre-feet and a normal storage capacity of 2,121 acre-feet. Situated on a branch of Little Yellow Creek, the dam plays a crucial role in managing water resources and habitat for aquatic wildlife in the area.

With a low hazard potential and a satisfactory condition assessment, Rynearson Dam No. 1 has undergone multiple modifications over the years, including hydraulic and structural upgrades in 1989 and 2003. The dam features other controlled outlet gates and a spillway width of 216 feet, allowing for a maximum discharge of 5,355 cubic feet per second. Despite not being regulated by the state, the dam is inspected every five years to ensure its continued safe operation. As a key component of the Fish and Wildlife Service's operations, Rynearson Dam No. 1 serves as an important structure in the conservation and management of water resources in the region.

In the picturesque landscape of Juneau County, Wisconsin, Rynearson Dam No. 1 stands as a testament to the intersection of water resource management and environmental conservation. With its strategic location and design tailored for fish and wildlife habitat, the dam serves as a vital component in the broader ecosystem of the area. From its humble beginnings in 1939 to its continued role in safeguarding water resources and supporting biodiversity, Rynearson Dam No. 1 exemplifies the harmonious coexistence of human infrastructure and natural ecosystems in the fight against climate change and the preservation of our planet's precious resources.