Question: Which canal was in operation longer, Leiper Canal or Carondelet Canal?

Context articles: Leiper Railroad
Leiper Canal
Panama Canal Authority
Carondelet Street
Canal de Beuvry
Erie Canal Lock 52 Complex
History of Panama (1977–present)
Obvodny Canal
Carondelet Canal
Fæstningskanalen

The Leiper Railroad was a 'family business built' horse drawn railroad of three quarters of a mile constructed in 1810 after the quarry owner, Thomas Leiper, failed to obtain a charter with legal rights-of-way to instead build his desired canal along Crum Creek.
 The quarry man's 'make-do' railroad solution was the continent's "first chartered railway, first operational non-temporary railway, first well documented railroad, "and" first constructed railroad" also "meant to be permanent".
Early in the 19th century, the Leiper Canal built in 1828-29 during the middle of the American canal age ran about 3 mi along Crum Creek in Delaware County to its mouth in Eastern Pennsylvania's Delaware Valley carrying its owners quarried products to docks on the Delaware River tidewater until 1852.
The Panama Canal Authority (Spanish: "Autoridad del Canal de Panamá (ACP)" ) is the agency of the government of Panama responsible for the operation and management of the Panama Canal.
 The ACP took over the administration of the canal from the Panama Canal Commission, the joint US–Panama agency that managed the canal, on December 31, 1999, when the canal was handed over from the United States to Panama as per the Torrijos–Carter Treaties.
Carondelet Street is a major street in New Orleans.
 It is one-way eastbound.
 It starts at Robert Street in the Garden District and continues to Josephine Street.
 One must turn left at this point, and then right.
 Carondelet continues up to Canal Street.
The Canal de Beuvry is a canal in northern France connecting to the Canal Dunkerque-Escaut but no longer navigable all the way to Beuvry.
 With the loss of the coal industry in this area, the canal is no longer used.
Erie Canal Lock 52 Complex is a national historic district located at Port Byron and Mentz in Cayuga County, New York.
 The district includes two contributing buildings (the Erie House and the blacksmith shop / mule barn); three contributing engineering structures (Erie Canal Lock 52, culvert, and canal prism of the enlarged Erie Canal); and archaeological sites associated with the canal operations.
 Lock 52 was constructed 1849-1853 as part of the Enlarged Erie Canal program.
 It remained in operation until the rerouting of the canal under the New York State Barge Canal System in 1917.
 The Erie House was built in 1894 and is a two story frame structure that housed a saloon and hotel.
On September 7, 1977, Carter and Torrijos met in Washington to sign the treaties in a ceremony that also was attended by representatives of twenty-six other nations of the Western Hemisphere.
 The Panama Canal Treaty, the major document signed on September 7, abrogated the 1903 treaty and all other previous bilateral agreements concerning the canal.
 The treaty was to enter into force six months after the exchange of instruments of ratification and to expire at noon on December 31, 1999.
 The Panama Canal Company and the Canal Zone government would cease to operate and Panama would assume complete legal jurisdiction over the former Canal Zone immediately, although the United States would retain jurisdiction over its citizens during a thirty-month transition period.
 Panama would grant the United States rights to operate, maintain, and manage the canal through a new United States government agency, the Panama Canal Commission.
 The commission would be supervised by a board of five members from the United States and four from Panama; the ratio was fixed for the duration of the treaty.
 The commission would have a United States administrator and Panamanian deputy administrator until January 1, 1990, when the nationalities of these two positions would be reversed.
 Panamanian nationals would constitute a growing number of commission employees in preparation for their assumption of full responsibility in 2000.
 Another binational body, the Panama Canal Consultative Committee, was created to advise the respective governments on policy matters affecting the canal's operation.
Obvodny Canal (Russian: Обводный канал , lit.
 Bypass Canal) is the longest canal in Saint Petersburg, Russia, which in the 19th century served as the southern limit of the city.
 It is 8 km long and flows from the Neva River near Alexander Nevsky Lavra to the Yekaterinhofka not far from the sea port.
 The canal was dug in 1769–80 and 1805–33.
 By the late 19th century, after to the Industrial Revolution, it had effectively become a sewer collecting wastewater of adjacent industrial enterprises.
 Eventually the canal became shallow and no longer navigable.
 The banks of the canal are lined with granite.
The Carondelet Canal, also known as the Old Basin Canal, was a canal in New Orleans, Louisiana, U.S.A., operating from 1794 into the 1920s – or nearly 135 years.
 It ceased to be navigable in 1927 and was filled in 1938.
Fæstningskanalen (literally "The Fortification Canal") is a canal in central Kongens Lyngby, Lyngby-Taarbæk Municipality, Copenhagen, Denmark.
 Created in the 1880s as part of the new fortification ring around the Danish capital, it runs from Lyngby Lake in the west to Lyngby Hovedgade in the east.
 From there it originally continued to Ermelunden in Jægersborg Dyrehave, but this last leg of the canal is no longer filled with water.
 The project also included a more upstream straightening of the section of Mølleåen that connects Furesø in the west to the west side of Lyngby Lake in the east.
 The canal complemented the West Rampart (Vestvolden) and a series of coastal fortresses which were built at the same time.
 In the event of an enermy invasion, a dam at each end of the canal, one at Frederiksdal and one at Ermelunden, would be opened, and the natural drainage of Lyngby Lake would be blocked, leading to the flooding of an extensive area of land along Hvidørebækken all the way out to the Øresund coast.
 Water would also be led through Gentofte Lake to Utterslev Mose, leading to further floodings.
 Together with the moat in front of the West Rampart, this would create a complete water barrier around the Danish capital.