Dam No 3, also known as Paddleboat Lake, is a private-owned earth dam located in Linn, Kansas, along the Middle Creek-TR stream. Built by Bishop Engineers, this dam stands at a height of 25.2 feet and has a storage capacity of 135.64 acre-feet. The primary purpose of Dam No 3 is for recreation, offering opportunities for water enthusiasts to enjoy various activities in the surrounding area.

With a low hazard potential and a "Not Rated" condition assessment, Dam No 3 has not been inspected recently, but it is regulated, permitted, and inspected by the state of Kansas. The dam's spillway width of 40 feet ensures proper water discharge during heavy rainfall events. While the dam has not been modified in recent years, it serves as a vital structure for water resource management in the region. Overall, Dam No 3 plays a crucial role in providing recreational opportunities while maintaining water safety and security for the local community.