The NPS Focus is an online program that offers a growing collection of images, documents, drawings, and maps about the cultural and natural resources maintained by the National Park Service. Please click on the link NPS Focus to browse the digital library and research station.
Did You Know?
Before the 1950s, the Missouri River carried an average of roughly 140 million tons of sediment per year past Yankton. After closure of the dams in the 1960s, an average of roughly 4 million tons per year moved past the same location.