Lower Power, also known as Saint Croix, is a gravity dam located on the Willow River in Hudson, Wisconsin. Completed in 1866, the dam serves primarily for recreational purposes, offering a surface area of 270 acres and a maximum discharge capacity of 15,900 cubic feet per second. With a height of 22 feet and a hydraulic height of 14 feet, Lower Power provides a tranquil reservoir with a normal storage capacity of 1,388 acre-feet.

Despite its age, Lower Power has a low hazard potential and has been deemed to be in satisfactory condition as of the last assessment in 2016. The dam is regulated by the Wisconsin Department of Natural Resources and undergoes regular inspections every 10 years. Its controlled spillway ensures proper water management, while the risk assessment ranks the dam as having a very high risk level. The surrounding area is known for its scenic beauty and recreational opportunities, making Lower Power a vital resource for both the local community and visitors alike.

Overall, Lower Power stands as a historic landmark in St. Croix, Wisconsin, offering a picturesque setting for outdoor activities and water recreation. With its rich history dating back to the 19th century and continued operation for over a century, the dam serves as a testament to the importance of water resource management and the preservation of natural landscapes. As climate change poses new challenges to water infrastructure, the maintenance and regulation of dams like Lower Power become increasingly crucial in ensuring the safety and sustainability of our water resources for future generations.