Question: Which canal is longer, the Industrial Canal in Louisana or the James River and Kanawha Canal in Virginia?

Context paragraphs:
Fort Riverview: Fort Riverview is a historic archaeological site located near Madison Heights, Amherst County, Virginia.  It is an American Civil War redoubt built by the Confederate States Army about 1863 to protect Six Mile Bridge and the James River and Kanawha Canal system along the James River.  Fort Riverview served as part of the outer defense system for Lynchburg, Virginia.  The protection of this bridge was vital to the Confederacy as it carried supplies for General Robert E. Lee.  Since Lynchburg served as a major supply, staging, and hospital center, Fort Riverview was strategically located to protect this critical center.

James River and Kanawha Turnpike: The James River and Kanawha Turnpike was built to facilitate portage of shipments of passengers and freight by water between the western reaches of the James River via the James River and Kanawha Canal and the eastern reaches of the Kanawha River.

Industrial Canal: The Industrial Canal is a 5.5 mile (9 km) waterway in New Orleans, Louisiana, United States.  The waterway's proper name, as used by the U.S. Army Corps of Engineers and on NOAA nautical charts, is Inner Harbor Navigation Canal (IHNC).  The more common "Industrial Canal" name is used locally, both by commercial mariners and by landside residents.

Richmond and Alleghany Railroad: The Richmond and Alleghany Railroad was built along the James River along the route of the James River and Kanawha Canal from Richmond on the fall line at the head of navigation to a point west of Lynchburg near Buchanan, Virginia, and combined with the Buchanan and Clifton Forge Railway Company to reach Clifton Forge, Virginia.

Westham Station: Westham Station in Henrico County, Virginia, USA, was originally located at Westham on the Richmond and Allegheny Railroad (R&A), which was laid along the towpath of the James River and Kanawha Canal in the 1880s.  The R&A railroad was acquired by the Chesapeake and Ohio Railway (C&O) in the 1890s.  Westham Station was built in 1911, near the Westham Bridge, which spans James River.  The station was heated by a coal stove and had a telegraph for communication through the 1950s.

Tobacco Row, Richmond: Tobacco Row is a collection of tobacco warehouses and cigarette factories in Richmond, Virginia adjacent to the James River and Kanawha Canal near its eastern terminus at the head of navigation of the James River.

James River and Kanawha Canal: The James River and Kanawha Canal was a partially built canal in Virginia intended to facilitate shipments of passengers and freight by water between the western counties of Virginia and the coast.  Ultimately its towpath became the roadbed for a rail line following the same course.

James River State Park: James River State Park is a state park located along the James River in Buckingham County, Virginia.  Opened June 20, 1999, it preserves part of the route of the Kanawha Canal in addition to portions of the river.

Huguenot Memorial Bridge: Huguenot Memorial Bridge is located in Henrico County and the independent city of Richmond, Virginia.  It carries State Route 147 across the former Chesapeake and Ohio Railway (now the James River Line of CSX Transportation), the James River and Kanawha Canal, and the James River in the fall line region above the head of navigation at Richmond.

Buchanan Historic District: Buchanan Historic District is a national historic district located at Buchanan, Botetourt County, Virginia.  It encompasses 277 contributing buildings, 5 contributing sites, and 4 contributing structures in Buchanan and Pattonsburg on both sides of the James River.  They include commercial, transportation-related, domestic, religious, and industrial resources associated with the community's development from the late-18th century through the late-20th century.  Notable buildings include the Pattonsburg Mill (1838), Buchanan Presbyterian Church (1845), Trinity Episcopal Church (1842), Hotel Botetourt (1851), Sorrell House (1850), James Evans Mason Lodge (1884), Virginia Can Company complex (1903), "Oak Hill" (1840), Town Hall Municipal Building, Bank of Buchanan, Ransone's Drugstore, Buchanan Theatre (1919), and Buchanan High School (1928).  The contributing sites include the James River & Kanawha Canal project site, Johnston-Boyd Cemetery (1835-1906), and Mountain View Cemetery (1854).  The contributing structures include the Stone Arch Tunnel (1870s).  Also located in the district is the separately listed Wilson Warehouse.

Supporting paragraphs: Industrial Canal James River and Kanawha Canal
Answer: The James River and Kanawha Canal