Dam No 7-8, also known as Upper Verdigris Watershed Dam 7-8, is a significant earth dam located in Virgil, Greenwood County, Kansas. Constructed in 1970 by A&E and USDA SCS designers, this dam plays a crucial role in flood risk reduction for the Holderman Creek-TR river system. With a height of 51 feet and a length of 1870 feet, Dam No 7-8 has a storage capacity of 3517 acre-feet, serving as a vital water supply source for the region.

Managed by the local government and regulated by the Kansas Department of Agriculture, Dam No 7-8 holds a fair condition assessment and a significant hazard potential rating. Despite its age, the dam continues to fulfill its primary purpose of flood risk reduction, with a spillway width of 100 feet for uncontrolled water release. The dam's location in a moderate risk area underscores the importance of regular inspections and emergency preparedness measures to ensure the safety of nearby communities and water resources.

As a key component of water resource management in Kansas, Dam No 7-8 stands as a testament to the collaboration between local and state agencies in safeguarding against floods and ensuring a stable water supply. With its strategic design and operational history, this dam serves as a critical infrastructure for climate enthusiasts and water resource professionals alike, highlighting the intersection of engineering, regulation, and environmental stewardship in mitigating natural hazards and sustaining water security for future generations.