Dd No 2 (Harvey) is a local government-owned earth dam located in Potwin, Kansas, along the Dry Creek-TR stream. The dam was designed by the SCS and serves primarily for flood risk reduction purposes. With a dam height of 23 feet and a length of 2800 feet, Dd No 2 has a maximum storage capacity of 316.7 acre-feet and a normal storage capacity of 16.8 acre-feet. The dam has a low hazard potential and is currently rated as "not rated" in terms of condition assessment.

Despite its moderate risk rating, Dd No 2 has not been inspected recently, and its emergency action plan status is unknown. The dam's spillway type is uncontrolled, with a width of 50 feet, and it does not have any outlet gates. The dam is not associated with any other structures and is not operated by the US Army Corps of Engineers. The dam's risk management measures, inundation maps, and emergency contacts require updating, highlighting the need for continued monitoring and maintenance to ensure its effectiveness in flood risk reduction for the community of Potwin and surrounding areas in Butler County, Kansas.