Question: What was longer, the Black River Canal or the Chenango Canal?
Context: Black River Canal Warehouse is a historic canal warehouse building located at Boonville in Oneida County, New York.  It was built in 1850 and is a 1 ⁄ -story, rectangular, wood-frame building, 28 feet by 40 feet with a gable roof.  It was built as a warehouse on the Black River Canal and used as such until the canal was abandoned in 1924. Black River is an 81.0 mi river in the U.S. state of Michigan, flowing into the St. Clair River in the city of Port Huron.  The Black River Canal in northern Port Huron extends east into Lake Huron near Krafft Road. The Black River Canal was a canal built in northern New York in the United States to connect the Erie Canal to the Black River.  The canal had 109 locks along its 35 mi length.  Remains of several of the canal's former locks are visible along New York State Route 12 near Boonville. Port Leyden is a village in Lewis County, New York, United States.  The population was 672 at the 2010 census.  The name is derived from the village's early history as a port on the Black River Canal. The Chenango Canal was a towpath canal built and operated in the mid-19th century in Upstate New York in the United States.  It was 97 miles long and for much of its course followed the Chenango River, along Rt. 12 N-S from Binghamton on the south end to Utica on the north end.  It operated from 1834 to 1878 and provided a significant link in the water transportation system of the northeastern U.S., connecting the Susquehanna River to the Erie Canal. Five Lock Combine and Locks 37 and 38, Black River Canal Chenango Canal Prism and Lock 107 is a national historic district located at Chenango Forks in Broome County, New York, United States.  The district includes four contributing structures.  They are the guard lock and dam constructed between 1834 and 1836 for navigation as part of the Chenango Canal.  The district also includes the canal prism and adjacent tow path at Lock 107. The New River is a tidal estuary in South Florida, United States.  The river is connected to the Everglades through a series of man made canals.  After passing through Fort Lauderdale, the river connects to the Atlantic Ocean at Port Everglades cut.  The river is entirely within Broward County and is composed from the junction of three main canals which originate in the Everglades, splitting off from the Miami Canal.  They are the North New River Canal, which flows on the north side of State Road 84 / Interstate 595; the South New River Canal, which flows on the north side of Griffin Road and the south side of Orange Drive; and a canal which flows south of Sunrise Boulevard. Lock No. 1, North New River Canal (also known as Sewall Lock or Davie-Sewall Lock or Lock #4, North New River Canal) which opened in 1912 is a historic lock located between Davie and Plantation, Florida, United States.  It is located south of Plantation on SR 84.  On February 17, 1978, it was added to the U.S. National Register of Historic Places. US Post Office-Boonville is a historic post office building located at Boonville in Oneida County, New York, United States.  It was designed and built in 1937, and is one of a number of post offices in New York State designed by the Office of the Supervising Architect of the Treasury Department, Louis A. Simon.  It is a one story, five bay building with a poured concrete foundation and brick facades in the Colonial Revival style.  It features a hipped roof surmounted by an octagonal cupola with metal window tracery and an iron weathervane.  The interior features a mural painted by the McCullough sisters of New York City depicting a 19th-century scene on the Black River Canal.  It is a contributing structure within the Boonville Historic District.
Answer: Chenango Canal