Cassadaga was settled in 1848 at the headwaters of the technically navigable Cassadaga Creek , though the upper few miles of it are not practically so today due to numerous shallows and beaver activity along its course .
Cassadaga was settled by European Americans in 1848 at the headwaters of the technically navigable Cassadaga Creek . 
 Practically , the upper few miles of it are not navigable in the 21st century , due to numerous shallows and beaver activity along its course .