Plattsmouth, NE


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Plattsmouth is a city in and the county seat of Cass County, Nebraska, United States, which was founded in 1855. The population was 6,887 at the 2000 census.
The Lewis and Clark Expedition passed the mouth of the Platte River, just north of what is now Main Street Plattsmouth, on July 21, 1804.
Plattsmouth first appeared in 1854 as "the Barracks", a trading post established by Sam Martin, owner of the Platteville ferry in neighboring Mills County, Iowa, ferryman Wheatley Mickelwait, and Glenwood, Iowa attorney and politician Colonel Joseph Longworthy Sharp.