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Canal engineering structures

49 articles

Malpas Tunnel

The Malpas Tunnel (tunnel du Malpas) is a canal tunnel on the Canal du Midi in southern France, built in 1679 and 1680 under Pierre-Paul Riquet and regarded as the world's first navigation tunnel.

Marine railway

A marine railway is a dry docking installation that hauls boats out of the water on a wheeled cradle for repair, known in Britain as a slipway.

Montech water slope

The Montech water slope (pente d'eau de Montech) is a boat lift on the Canal latéral à la Garonne in France, opened in 1974, where diesel tractors push a barge uphill on a wedge of water.

Morris Canal

The Morris Canal was a 19th-century anthracite-coal canal across northern New Jersey, running from Phillipsburg on the Delaware River to Jersey City, and remembered for its inclined planes.

Naviduct

A naviduct is a navigable aqueduct with shipping locks built into the waterway itself, so road traffic passes beneath. The only one, at Enkhuizen in the Netherlands, opened in 2003.

Panamax

Panamax is a ship-size class defined by the original Panama Canal locks, fitting vessels up to 965 feet long, and it remains a distinct, heavily traded class after the 2016 expansion.

Pontcysyllte Aqueduct

Pontcysyllte Aqueduct, Pont y Cysswllt, is a navigable canal aqueduct in Wrexham, Wales, opened in 1805 and the longest and highest in the United Kingdom.

Riqueval Tunnel

The Riqueval Tunnel (souterrain de Riqueval), also called the Grand Souterrain, is a 5,670-meter navigable canal tunnel on the Canal de Saint-Quentin in northern France, opened in 1810.

Rove Tunnel

The Rove Tunnel (tunnel du Rove) is a disused canal tunnel near Marseille, France, linking the port to the Étang de Berre; closed since a 1963 collapse, it remains the world's longest canal tunnel.

Roving bridge

A roving bridge, also called a turnover or snake bridge, carries a canal towpath across the water so a towing horse can cross without detaching the towline.

Sapperton Canal Tunnel

The Sapperton Canal Tunnel is a 3,490 m canal tunnel on the Thames & Severn Canal in Gloucestershire, England, opened in 1789 as the longest canal tunnel in the United Kingdom.

Slateford Aqueduct

The Slateford Aqueduct, also called Slateford viaduct, is an eight-arch masonry aqueduct in Edinburgh, built 1818–1822 to carry the Union Canal over the Water of Leith.

Soo Locks

The Soo Locks, also called the St. Mary's Falls Ship Canal, are navigation locks at Sault Ste. Marie, Michigan, that lift ships between Lake Superior and Lake Huron.

Stad Ship Tunnel

The Stad Ship Tunnel (Stad skipstunnel) is a planned 1,700-meter ship tunnel through Norway's Stad Peninsula, approved in 2021 as the world's first full-scale ship tunnel.

Staircase lock

A staircase lock is a set of canal locks built directly on top of one another, sharing gates so no pound separates them, allowing much steeper flights of locks.

Standedge Tunnels

The Standedge Tunnels are four parallel tunnels beneath the Pennines between Marsden and Diggle, England, including the canal tunnel on the Huddersfield Narrow Canal, opened in 1811 and the longest in Britain.

The Four Lifts on the Canal du Centre and their Environs, La Louvière and Le Roeulx (Hainaut)

Four hydraulic boat lifts on the Canal du Centre, Hainaut, Belgium (Les quatre ascenseurs du canal du Centre), UNESCO World Heritage Site 1998; built 1888-1917 to Edwin Clark's design, the only such lifts worldwide still working in original condition.

Waterford Flight

The Waterford Flight is a set of five consecutive high-lift locks, numbered E2 through E6, on the Erie Canal at Waterford, New York, raising vessels 169 feet.

Wharf

A wharf is a structure on a harbor shore or river or canal bank where ships moor to load and unload cargo, typically a fixed platform on pilings.