Dd No 129, also known as Wet Walnut Watershed Dam No 129, is a flood risk reduction infrastructure located in Bazine, Kansas. Owned by the local government, this dam was completed in 1977 with a primary purpose of flood risk reduction along the Walnut Creek-TR river or stream. Designed by USDA NRCS, this buttress-type dam stands at a height of 32 feet with a hydraulic height of 26 feet and a structural height of 32 feet. It has a storage capacity of 490 acre-feet and a normal storage of 10.1 acre-feet, covering a surface area of 4.1 acres.

This low hazard potential dam in Ness County, Kansas, is under state regulation and jurisdiction, with the Kansas Department of Agriculture overseeing its permitting, inspection, and enforcement. Despite not being rated for its condition assessment, Dd No 129 has not undergone any modifications since its completion. The dam features a spillway width of 50 feet and does not have outlet gates. With no associated structures, the last inspection of this dam was conducted in July 2014, with an inspection frequency of 0. While the risk assessment, emergency action plan, and inundation maps status remain unknown, Dd No 129 serves as a crucial infrastructure for flood risk management in the region.