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 is bordered by 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 Mas ...

to shipbuilding centers at Newburyport, Massachusetts, 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 Francis Cabot ...

bought up the old Pawtucket Canal in what was then East

Chelmsford, Massachusetts Chelmsford () is a town in Massachusetts that was established in 1655. It is located northwest of Boston. The Chelmsford militia played a role in the American Revolution at the Battle of Lexington and Concord and the Battle of Bunker Hill. ...

. Within a few years, the new industrial center that became Lowell was using canals feeding off of 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 goods s ...

. The first of these canals was the Merrimack Canal, 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 o ...

. 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 proces ...

, 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 on the Northern Canal. The Canal System and the Gatehouse were designated a Historic Civil Engineering Landmark by the ASCE 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 ...

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 g ...

. It was added to the

National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...

in 1976, and declared a

National Historic Landmark A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 places listed ...

the next year.NPS NHL Listing info

Timeline of canals

* 1796:

* 1822: Merrimack Canal * 1825: Hamilton Canal * 1828: Lowell Canal * 1831: Lawrence Canal, Western Canal * 1835: Eastern Canal * 1847: Northern Canal, Moody Street Feeder, and Pawtucket Gatehouse

References

External links

Historic American Engineering Record Heritage Documentation Programs (HDP) is a division of the U.S. National Park Service (NPS) responsible for administering the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER), and Historic American Landscapes ...

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)

Timeline of canals

See also

References

External links