1. Water-surface elevations and boundaries of the 100-year and 500-year floods and floodway for the Jocko River, western Montana [cartographic material] Yale Public content 2006. 2006-05-11T18:55:11Z. 2012-01-17T15:22:02Z. Chase, Katherine J. U.S. Geological Survey ; Information Services [distributor]. English. Public. Montana and Jocko River.