Gs Dd No 109 is a crucial flood risk reduction structure located in Lawrence, Kansas, along the Rock Creek-TR. Built in 1985 by designers Speaker & King, this earth dam stands at a height of 31 feet and has a length of 670 feet, providing a storage capacity of 168 acre-feet. With a low hazard potential and moderate risk assessment, this dam plays a vital role in controlling debris and reducing flood risks in the area.

Managed by the Kansas Department of Agriculture, Gs Dd No 109 is state-regulated, permitted, inspected, and enforced for safety and compliance. The dam features an uncontrolled spillway with a width of 53 feet and has a drainage area of 0.37 square miles. While the condition assessment is currently not rated, the dam meets guidelines for emergency action plans and has emergency contacts updated for any potential risks.

With its primary purpose being flood risk reduction, Gs Dd No 109 serves as a crucial infrastructure for protecting the Osage County community in Kansas. Despite its age, the dam continues to be a reliable structure for mitigating potential hazards and ensuring the safety of the surrounding area.