Located in Grafton, North Dakota, the Grafton Rr Dam is a vital piece of infrastructure owned by the local government and regulated by the North Dakota State Water Commission. Built in 1967 by NDSWC & NPRR, this buttress dam stands at a height of 16.4 feet and has a structural height of 29 feet, serving primarily as a water supply source for the region. With a storage capacity of 166 acre-feet and a controlled spillway width of 80 feet, the dam plays a crucial role in managing the flow of the Park River.

Despite its low hazard potential, the Grafton Rr Dam is classified as having a very high risk due to its age and condition assessment not being rated. The dam features slide and vertical lift outlet gates for water release and has not been modified in recent years. While the dam is not under the jurisdiction of any federal agency, it undergoes regular state inspection, permitting, and enforcement to ensure its safety and functionality. With its strategic location and importance for water supply in Walsh County, the Grafton Rr Dam remains a key asset for the community and a focal point for water resource and climate enthusiasts.