Lowell Canal System
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The Lowell Power Canal System is the largest power canal system in the United States, at 5.6 miles in length. It is operating through six major canals on two levels, controlled by numerous gates. The system was begun in the 1790s, beginning its life as a transportation canal called the
Pawtucket Canal Completed in 1796, the Pawtucket Canal was originally built as a transportation canal to circumvent the Pawtucket Falls of the Merrimack River in East Chelmsford, Massachusetts. In the early 1820s it became a major component of the Lowell p ...
, which was constructed to get logs from
New Hampshire New Hampshire ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Massachusetts to the south, Vermont to the west, Maine and the Gulf of Maine to the east, and the Canadian province of Quebec t ...
down the
Merrimack River The Merrimack River (or Merrimac River, an occasional earlier spelling) 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 M ...
to shipbuilding centers at
Newburyport, Massachusetts Newburyport is a coastal city in Essex County, Massachusetts, United States, northeast of Boston. The population was 18,289 at the 2020 United States census, 2020 census. A historic seaport with a vibrant tourism industry, Newburyport includes p ...
, bypassing the 30-plus-foot drop of the Pawtucket Falls. In the early 1820s, Associates of the recently deceased
Francis Cabot Lowell Francis Cabot Lowell (April 7, 1775 – August 10, 1817) was an American businessman for whom the city of Lowell, Massachusetts, is named. He was instrumental in bringing the Industrial Revolution to the United States. Early life and education ...
bought up the old Pawtucket Canal in what was then East
Chelmsford, Massachusetts Chelmsford () is a town in Middlesex County, Massachusetts, United States. Chelmsford was incorporated in May 1655 by an act of the Massachusetts General Court. When Chelmsford was incorporated, its local economy was fueled by lumber mills, ...
. Within a few years, the new industrial center that became Lowell was using canals feeding off a widened and deepened Pawtucket Canal as a direct power source for their
textile mills Textile manufacturing or textile engineering is a major industry. It is largely based on the conversion of fibre into yarn, then yarn into fabric. These are then dyed or printed, fabricated into cloth which is then converted into useful good ...
. The first of these canals was the
Merrimack Canal The Merrimack Canal is a power canal in Lowell, Massachusetts. The canal, dug in the 1820s, begins at the Pawtucket Canal just above Swamp Locks, and empties into the Merrimack River near the Boott Cotton Mills. The Merrimack Canal was the f ...
, which powered the
Merrimack Manufacturing Company The Merrimack Manufacturing Company (also known as Merrimack Mills) was the first of the major textile manufacturing concerns to open in Lowell, Massachusetts, beginning operations in 1823. History After the death of Francis Cabot Lowell ...
. The repurposing of the
Proprietors of Locks and Canals The Proprietors of Locks and Canals on Merrimack River is a limited liability corporation founded on June 27, 1792, making it one of the oldest corporations in the United States. Its named incorporators were Dudley Atkins Tyng, William Coombs, Jose ...
allowed the Associates to sell water power to other companies, starting with the Hamilton Canal, leading to the explosive growth of the town, and then shortly thereafter, city, of Lowell. By the late 1840s, Lowell's canal system was producing as much power as possible. However, the Chief Engineer of Locks and Canals, an Englishman by the name of
James B. Francis James Bicheno Francis (May 18, 1815 – September 18, 1892) was a British-American civil engineer, who invented the Francis turbine. Early years James Francis was born in South Leigh, near Witney, Oxfordshire, in England, United Kingdom. ...
devised the Northern Canal and the Moody Street Feeder, to increase the capacity of, and availability of water to various parts of, the whole system. The Pawtucket Gatehouse was constructed to control flow from behind the Pawtucket Dam into the Northern Canal. The dam itself, which was built twenty years earlier, was lengthened at that time, diverting the entire Merrimack (during periods of lower flow) into the two canal system entrances above it. It is a stone dam topped with wooden flashboards – a system still used on this dam today. The level of the water is regulated by the flashboards and the metal pins that hold them back. When there is too much water going over the top of the dam, the pins bend backwards, releasing the boards, and the outflow of the dam is increased. The Gatehouse contains ten wooden gates that control the flow of the Merrimack into the canal. Originally, they were opened by a
Francis Turbine The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The pro ...
, also an invention of James B. Francis. Today, the Gatehouse is controlled electrically and remotely by Boott Hydroelectric, who is partially a continuation of the Proprietors of Locks and Canals, and who operates a 24-megawatt
hydroplant Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energ ...
on the Northern Canal. The Canal System and the Gatehouse were designated a
Historic Civil Engineering Landmark __NOTOC__ The following is a list of Historic Civil Engineering Landmarks as designated by the American Society of Civil Engineers since it began the program in 1964. The designation is granted to projects, structures, and sites in the United Stat ...
by the
ASCE The American Society of Civil Engineers (ASCE) is a tax-exempt professional body founded in 1852 to represent members of the civil engineering profession worldwide. Headquartered in Reston, Virginia, it is the oldest national engineering soci ...
in 1984 and a Historic Mechanical Engineering Landmark by the
ASME The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing edu ...
in 1985 and are part of
Lowell National Historical Park Lowell National Historical Park is a National Historical Park of the United States located in Lowell, Massachusetts. Established in 1978 a few years after Lowell Heritage State Park, it is operated by the National Park Service and comprises a ...
. It was added to the
National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...
in 1976, and declared a
National Historic Landmark A National Historic Landmark (NHL) is a National Register of Historic Places property types, building, district, object, site, or structure that is officially recognized by the Federal government of the United States, United States government f ...
the next year.NPS NHL Listing info


Timeline of canals

* 1796:
Pawtucket Canal Completed in 1796, the Pawtucket Canal was originally built as a transportation canal to circumvent the Pawtucket Falls of the Merrimack River in East Chelmsford, Massachusetts. In the early 1820s it became a major component of the Lowell p ...
* 1822:
Merrimack Canal The Merrimack Canal is a power canal in Lowell, Massachusetts. The canal, dug in the 1820s, begins at the Pawtucket Canal just above Swamp Locks, and empties into the Merrimack River near the Boott Cotton Mills. The Merrimack Canal was the f ...
* 1825: Hamilton Canal * 1828: Lowell Canal * 1831: Lawrence Canal, Western Canal * 1835: Eastern Canal * 1847: Northern Canal, Moody Street Feeder, and Pawtucket Gatehouse


See also

*
List of National Historic Landmarks in Massachusetts The Commonwealth of Massachusetts has a total of 192 National Historic Landmarks (NHLs) within its borders. This is the second highest statewide total in the United States after New York, which has more than 250. Of the Massachusetts NHLs, 5 ...
*
National Register of Historic Places listings in Lowell, Massachusetts __NOTOC__ These are the National Registered Historic Places listings in Lowell, Massachusetts. Current listings References {{DEFAULTSORT:National Register Of Historic Places Listings In Lowell, ...


References


External links

*
Historic American Engineering Record Heritage Documentation Programs (HDP) is a division of the U.S. National Park Service (NPS). It administers three programs established to document historic places in the United States: Historic American Buildings Survey (HABS), Historic American E ...
documentation, filed under Lowell, Middlesex County, MA: ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** {{Massachusetts canals and reservoirs Historic Civil Engineering Landmarks Canals in Lowell, Massachusetts Infrastructure completed in 1821 National Historic Landmarks in Massachusetts Historic districts in Middlesex County, Massachusetts National Register of Historic Places in Lowell, Massachusetts Locks on the National Register of Historic Places Historic American Engineering Record in Massachusetts Historic districts on the National Register of Historic Places in Massachusetts Canals on the National Register of Historic Places in Massachusetts Transportation buildings and structures on the National Register of Historic Places in Massachusetts Water transportation buildings and structures on the National Register of Historic Places Gatehouses (waterworks)