Question: Which river is near the Rumford Archeological Sites with prehistoric Native American items from 7000BCE to the Late Woodland period? 

Context paragraphs:
Biggs Ford Site: Biggs Ford Site is an archaeological site near Frederick in Frederick County, Maryland.  It is one of the few known, large late prehistoric Native American village sites near the Monocacy River.  The site dates from the Middle to Late Woodland period.

Upper Hay Lake Archeological District: The Upper Hay Lake Archeological District (Smithsonian trinomials 21CW7 and 21CW14) is a prehistoric Native American archaeological site in Jenkins Township, Minnesota, United States.  It consists of about 75 linear mounds—including one of the state's longest at 725 ft —plus the sites of a village and a portage.  The mound grouping has also been dubbed Fort Poualak.  The site was listed on the National Register of Historic Places in 1978 for having local significance in the theme of archaeology.  It was nominated for indicating an area of substantial activity during the Blackduck phase of the Late Woodland period.

Carrier Mills Archaeological District: The Carrier Mills Archaeological District is a group of prehistoric archaeological sites located along the Saline River south of Carrier Mills, Illinois.  The sites were inhabited over the period from 2500 B.C. to 700 A.D.  The oldest three sites date from the Late Archaic period, which encompassed the first 1500 years of occupation at the district; these sites include two small campsites and a larger base camp.  Several sites were inhabited during the Early Woodland period, which lasted until 500 B.C.; these sites are distinguished by fragments of pottery, which was developed during this period.  The Early Woodland period sites are likely to have been a part of the Crab Orchard culture, a local subtype of the Hopewell tradition.  A number of sites date from the Middle Woodland Period, which spanned from 300 B.C. to 500 A.D.; these sites appear to have adopted the technology, but not the traditions, of the Hopewell culture.  A single projectile point from the Late Woodland period has also been recovered from the site.

Leesville Dam Archeological Site: The Leesville Dam Archeological Site is a prehistoric Native American village site in Pittsylvania County, Virginia, near the town of Altavista.  The site is located in the general vicinity of the Roanoke River, and is one of the most important Late Woodland period (c. AD 1200-1600) village sites in the area.  It was listed on the National Register of Historic Places in 1989, at which time the site was covered by an agricultural field.

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.  The term "Woodland Period" was introduced in the 1930s as a generic term for prehistoric sites falling between the Archaic hunter-gatherers and the agriculturalist Mississippian cultures.  The Eastern Woodlands cultural region covers what is now eastern Canada south of the Subarctic region, the Eastern United States, along to the Gulf of Mexico.

Winooski Archeological Site: The Winooski Archeological Site, designated VT-CH-46 by state archaeologists, is a prehistoric Native American site in the city of Winooski, Vermont.  First identified in 1972, it is one of the largest Native encampment sites of the Middle Woodland period in the northeastern United States.  It was listed on the National Register of Historic Places in 1978, at which time it was recognized as one of just two stratified Woodland period sites in the state.

Rumford Archaeological Sites: The Rumford Archaeological Sites are a collection of prehistoric Native American sites in the vicinity of the Androscoggin River near Rumford, Maine.  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.  These sites are the subject of three separate listings on the National Register of Historic Places in 1972: the Rumford Falls I-IV Sites, the Rumford V Site, and the Town of Rumford Site.  The locations of these sensitive sites are not generally publicized.

Nottoway Archeological Site: The Nottoway Archeological Site is an overlapping series of prehistoric Native American settlement sites near the town of Stony Creek in Sussex County, Virginia.  The site, located on a terrace above the Nottoway River, has documented evidence of occupation from c. 9200BCE (the Paleo-Indian period) to c. 1600 (the Late Woodland Period).  Finds at the site have included significantly stratified occupation features such as hearths, as well as large numbers of stone points and hide scrapers.  It was, at the time of its listing in 1988, one of a small number of sites that shed light on Native American occupation of the interior coastal plain in the area.

Schilling Archeological District: The Schilling Archeological District (Smithsonian trinomial 21WA1) is a prehistoric Native American archaeological site on private property on Lower Grey Cloud Island in Cottage Grove, Minnesota, United States.  It consists of a habitation site and mound group with artifacts that date from the Early Woodland Period to the Late Prehistoric Period (1000 BCE–1700 CE).  It was listed on the National Register of Historic Places in 1978 for having state-level significance in the theme of archaeology.  It was nominated for its rare Early Woodland component, Middle Mississippian cultural influences, and potential to show climatic adaptations over time.

Sebre Lake Site: The Sebre Lake Site (Smithsonian trinomial 21CW55) is a prehistoric Native American archaeological site in Fort Ripley Township, Minnesota, United States.  It has yielded habitation and burial features accumulated over 4,000 years of intermittent use from the mid-Archaic to the early Late Woodland period.  The site was listed on the National Register of Historic Places in 1984 for having local significance in the theme of archaeology.  It was nominated for being one of the richest archaeological sites in the Nokasippi River Valley.

Supporting paragraphs: Rumford Archaeological Sites Woodland period
Answer: Androscoggin River