This April 3, 2001, photo shows the Holter Dam on the Missouri River near Wolf Creek, Mont., that is privately owned by Pennsylvania Power and Light. The Supreme Court justices will hear arguments Dec. 7 that invoke the Lewis and Clark expedition from two centuries ago in a dispute that could affect who controls waterways across the nation. (AP Photo/Great Falls Tribune, Stuart S. White, File)
Read the article: Dam dispute draws on Lewis and Clark's travels
