Dd No 23 is a locally owned dam located in Alma, Kansas, designed by Dale Steward, P.E. This earth dam was completed in 1994 with a primary purpose of flood risk reduction along the West Branch Mill Creek. With a height of 31 feet and a length of 550 feet, Dd No 23 has a storage capacity of 300.6 acre-feet and a drainage area of 0.95 square miles.

The dam is regulated by the Kansas Dept. of Agriculture and is under state jurisdiction for permitting, inspection, and enforcement. It has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite being uncontrolled, the spillway of Dd No 23 is 50 feet wide, allowing for a maximum discharge of 1290 cubic feet per second.

For water resource and climate enthusiasts, Dd No 23 presents a fascinating case study in dam infrastructure for flood risk reduction. Its location in Wabaunsee County, Kansas, and its moderate risk assessment of 3 highlight the importance of effective risk management measures in ensuring the safety and functionality of such critical water structures.