Pattenville topographic map
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About this map
Name: Pattenville topographic map, elevation, terrain.
Average elevation: 37 m
Minimum elevation: 22 m
Maximum elevation: 94 m
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Concord River
United States > Massachusetts > Middlesex County > Billerica
The river begins in Middlesex County, formed by the confluence of the Sudbury and Assabet Rivers at Egg Rock, near the Concord town center. It flows generally north, from eastern Concord (along the northwestern edge of the Boston metropolitan area), joining the Merrimack River from the south on the eastern…
Average elevation: 50 m