Dd No G-3 (Merrill), also known as Upper Pottawatomie Creek Dam No G3, is a flood risk reduction structure located in Anderson County, Kansas. Owned by the local government and regulated by the Kansas Department of Agriculture, this dam serves to protect the surrounding area from potential flooding events along the South Fork Pottawatomie Creek.

Constructed by the USDA NRCS, Dd No G-3 stands at a height of 37 feet with a hydraulic height of 33 feet and a structural height of 37 feet. With a storage capacity of 120 acre-feet, this buttress-type dam spans a length of 580 feet and has a maximum discharge of 602 cubic feet per second. Despite its low hazard potential, the condition of this dam has not been rated, and no emergency action plan or inundation maps have been prepared.

Water resource and climate enthusiasts will find Dd No G-3 (Merrill) to be an essential piece of infrastructure in managing flood risks in the area. With its strategic location and design, this dam plays a critical role in protecting the community and surrounding environment from potential flooding events, showcasing the importance of resilient water resource management practices in the face of changing climate conditions.