Lake Riley, located in Hennepin County, Minnesota, is a gravity dam constructed in 1958 with a primary purpose listed as "Other." This picturesque reservoir on Riley Creek has a normal storage capacity of 3000 acre-feet and a maximum storage capacity of 3900 acre-feet, covering a surface area of 296 acres. The dam stands at a height of 9 feet and has a length of 20 feet, with a low hazard potential and satisfactory condition assessment as of the last inspection in December 2015.

With a drainage area of 8.3 square miles, Lake Riley plays a crucial role in water resource management in the region, with a maximum discharge capacity of 350 cubic feet per second. Although not state-regulated, this state-owned structure provides recreational opportunities in the city of Eden Prairie. The dam's Buttress core type and unlisted/unknown foundations contribute to its structural integrity, ensuring the safety of the surrounding community and enhancing the natural beauty of the area.

Lake Riley, managed by the state of Minnesota, is a key feature in the local landscape, offering a peaceful retreat for residents and visitors alike. The dam's strategic location on Riley Creek and its vital role in flood control and water storage make it a significant asset in the region's water resource infrastructure. With its low hazard potential and satisfactory condition, Lake Riley stands as a testament to effective dam management and environmental stewardship in the face of changing climate patterns.