Which river is near the Rumford Archeological Sites with prehistoric Native American items from 7000BCE to the Late Woodland period? 
Rumford Archaeological Sites:  These six sites provide a window of observation into the movements and practices of Native Americans from c. 7,000 BCE (the early Archaic period) to the Late Woodland period and contact with Europeans. Woodland period: In the classification of , the Woodland period of North American pre-Columbian cultures spanned a period from roughly 1000 BCE to European contact in the eastern part of North America, with some archaeologists distinguishing the Mississippian period, from 1000 CE to European contact as a separate period.
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