Lowell Locks and Canals Historic District
Encyclopedia
Lowell Locks and Canals Historic District is a National Historic Landmark District between Middlesex Street and the Merrimack River
Merrimack River
The Merrimack River is a river in the northeastern United States. It rises at the confluence of the Pemigewasset and Winnipesaukee rivers in Franklin, New Hampshire, flows southward into Massachusetts, and then flows northeast until it empties into the Atlantic Ocean at Newburyport...

 in Lowell, Massachusetts
Lowell, Massachusetts
Lowell is a city in Middlesex County, Massachusetts, USA. According to the 2010 census, the city's population was 106,519. It is the fourth largest city in the state. Lowell and Cambridge are the county seats of Middlesex County...

.

The lock
Lock (water transport)
A lock is a device for raising and lowering boats between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is...

 and canal
Canal
Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...

s were largely built in 1821 by Nathan Appleton
Nathan Appleton
Nathan Appleton was an American merchant and politician.- Biography :Appleton was born in New Ipswich, New Hampshire, the son of Isaac Appleton and his wife Mary Adams. Appleton's father was a church deacon, and Nathan was brought up in "strictest form of Calvinistic Congregationalism." He was...

 and Kirk Boott for early industrial use. The site was added to the National Register of Historic Places
National Register of Historic Places
The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

in 1976.
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