Dam No 1, also known as 5-Acre Lake, is a privately owned earth dam located in Linn, Kansas. Designed by Bishop Engineers, this recreational dam stands at a height of 26 feet and spans a length of 720 feet. Its primary purpose is for recreation, offering a serene spot for water resource and climate enthusiasts to enjoy the beauty of the surrounding Middle Creek-TR river or stream.

With a storage capacity of 64 acre-feet and a low hazard potential, Dam No 1 provides a safe and picturesque environment for outdoor activities. Although its condition assessment is currently listed as 'Not Rated', the dam meets state permitting, inspection, and enforcement requirements, ensuring the safety of its visitors. Surrounded by lush landscapes and wildlife, this dam serves as a tranquil retreat for those seeking to connect with nature and appreciate the importance of water resources in a changing climate.

Located in the Tulsa District and under the jurisdiction of the state of Kansas, Dam No 1 offers a peaceful escape for individuals and families looking to unwind and explore the great outdoors. Whether it's fishing, boating, or simply taking in the scenic views, this dam provides an ideal setting for water resource and climate enthusiasts to experience the beauty and serenity of nature while also emphasizing the importance of responsible dam management and conservation efforts.