East Branch Penobscot River

The East Branch Penobscot River is a 75.3-mile-long (121.2 km)^[1] tributary of Maine's Penobscot River. It flows in Piscataquis County and Penobscot County.

East Branch Penobscot River
East Branch Penobscot River, northeast of Millinocket, Maine.
Location
Country	United States
Physical characteristics
Source
• location	Maine
• elevation	1,000 feet (300 m)
Mouth
• location	Penobscot River
• coordinates	45°36′32″N 68°32′02″W
• elevation	240 feet (70 m)
Length	75 miles (121 km)
Basin features
Tributaries
• left	Seboeis River

Course

From its source (46°16′01″N 69°12′08″W) in Maine Township 7, Range 11, WELS, in Piscataquis County, the river runs 17 miles (27 km)^[1] southeast through the North Maine Woods to Grand Lake Matagamon reservoir, in the northeast corner of Baxter State Park. From Grand Lake Dam, the river runs 48 miles (77 km)^[1] south to its confluence with the West Branch Penobscot River in Medway, Penobscot County.

Matagamon Lake

Grand Lake Matagamon
Grand Lake Matagamon
Coordinates	46°10′25″N 68°50′33″W
Max. length	8 mi (13 km)[2]
Surface area	4,868 acres (1,970 ha)[3]
Max. depth	95 feet (29 m)[4]
Water volume	80,878 acre⋅ft (99,762,000 m3)[3]
Surface elevation	653 ft (199 m)[5]

Grand Lake Matagamon or Matagamon Lake is a reservoir on the East Branch, impounded by Grand Lake Dam. The dam was built at the outlet of First Lake, and flooded vast expanses of low-lying land extending upstream to include Second Lake.

The shallow water habitat created by the dam is more suitable for yellow perch, fallfish, and longnose sucker rather than for trout.^[4]

See also

• Tributaries of the Penobscot River
• List of rivers of Maine

References

1. U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-03-29 at the Wayback Machine, accessed June 22, 2011
2. The Maine Atlas and Gazetteer (Thirteenth ed.). Freeport, Maine: DeLorme Mapping Company. 1988. pp. 51&57. ISBN 0-89933-035-5.
3. Maine Depts. of Environmental Protection and Inland Fisheries & Wildlife (2005-08-04). "Maine Lakes: Morphometry and Geographic Information". Senator George J. Mitchell Center for Environmental and Watershed Research, The University of Maine. Archived from the original on 2006-09-03. Retrieved 2008-07-31.
4. "Matagamon Lake" (PDF). Maine Department of Inland Fisheries and Game. State of Maine. Archived from the original (PDF) on 1 February 2017. Retrieved 4 May 2016.
5. U.S. Geological Survey Geographic Names Information System: Grand Lake Matagamon

• "East Branch Penobscot River". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. 30 September 1980. Retrieved 2010-05-23.
• Maine Streamflow Data from the USGS
• Maine Watershed Data From Environmental Protection Agency