Dd No 9, also known as Cedar Creek Watershed Dam 9, is a vital structure located in Altoona, Kansas, within the Big Cedar Creek watershed. Built in 1972 by USDA NRCS, this earth dam stands at a height of 35 feet and serves the primary purpose of flood risk reduction. With a storage capacity of 445.87 acre-feet, it covers a surface area of 11.1 acres and drains a watershed area of 1.39 square miles.

Managed by the Kansas Department of Agriculture, Dd No 9 is regulated, permitted, inspected, and enforced to ensure its functionality and safety. Despite its low hazard potential, the dam's risk assessment indicates a moderate risk level (3). While the structure has not been rated for its condition, it plays a crucial role in mitigating flooding in the region and protecting the surrounding community and environment.

With its uncontrolled spillway and lack of outlet gates, Dd No 9 remains a key component in the flood risk management strategy for Wilson County, Kansas. As water resource and climate enthusiasts, understanding and monitoring the condition and functionality of this dam is essential for ensuring the safety and resilience of the local watershed and community in the face of changing weather patterns and hydrological conditions.