Middlesex County topographic maps

Average elevation: 73 m

Average elevation: 72 m

Average elevation: 66 m

Average elevation: 28 m

Average elevation: 70 m

Cambridge obtains water from Hobbs Brook (in Lincoln and Waltham) and Stony Brook (Waltham and Weston), as well as an emergency connection to the Massachusetts Water Resources Authority. The city owns over 1,200 acres (486 ha) of land in other towns that includes these reservoirs and portions of their…

Average elevation: 11 m

Average elevation: 62 m

Average elevation: 69 m

Average elevation: 57 m

Average elevation: 90 m

Average elevation: 42 m

Average elevation: 47 m

Average elevation: 29 m

Lowell is located at the confluence of the Merrimack and Concord rivers. The Pawtucket Falls, a mile-long set of rapids with a total drop in elevation of 32 feet, ends where the two rivers meet. At the top of the falls is the Pawtucket Dam, designed to turn the upper Merrimack into a millpond, diverted through…

Average elevation: 55 m

Average elevation: 45 m

Average elevation: 135 m

Average elevation: 34 m

Average elevation: 81 m

Average elevation: 95 m

Average elevation: 23 m