Black Swan Lake Dam, located in Holliday, Johnson, Kansas, is a private earth dam with a primary purpose of recreation. Completed in 1982, the dam stands at a height of 62 feet and has a hydraulic height of 59 feet. With a maximum storage capacity of 263 acre-feet and a normal storage capacity of 200 acre-feet, the dam covers a surface area of 11.4 acres and drains a small area of 0.21 square miles.

Managed by the Kansas Department of Agriculture, the Black Swan Lake Dam is in fair condition with a high hazard potential. The dam features a controlled spillway with a width of 20 feet and is inspected every 3 years. Although there are no outlet gates, the dam is equipped to handle emergency situations. The risk assessment for the dam indicates a very high risk level, emphasizing the importance of proper maintenance and monitoring.

Situated along the Kansas River-TR, Black Swan Lake Dam offers a recreational oasis for water resource and climate enthusiasts. With its picturesque surroundings and potential for outdoor activities, the dam serves as a vital water resource while also posing a significant risk in case of emergencies. As efforts continue to ensure the dam's safety and functionality, it remains a key landmark in the region for both leisure and environmental considerations.