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MNRR's news magazine and park guide, Undercurrents, is published annually with intermittent updates throughout the year.
The following issues are available in PDF format:
Undercurrents 2009.0 (2.3 MB)
Undercurrents 2008.3 (1.8 MB)
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.
Last Updated: April 22, 2009 at 10:53 EST