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A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.
Channellock is an American company that produces hand tools.It is best known for its pliers—the company manufactures more than 75 types and sizes of pliers [1] —particularly its eponymous style of tongue-and-groove, slip-joint pliers. [2]
[2] [3] The locks also have an overflow 'by-wash' at the side, which water runs down when the lock is not open. When a descending boat enters each lock chamber the water level rises slightly and the excess flows via an overflow channel at the side which runs into the main by-wash. [4] The structure is Grade I listed. [5]
The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats ...
Flight of six locks, in a quite ornate setting and including the UK's second deepest lock, [1] two pumping stations and several Grade II listed buildings. Bingley Five Rise Locks: Leeds and Liverpool Canal: grid reference: These staircase locks are the steepest flight of locks in the UK, with a gradient of about 1:5. Bow Locks: River Lee Navigation
The Eisenhower Locks in Massena, New York St. Lawrence Seaway St. Lawrence Seaway separated navigation channel near Montreal. The St. Lawrence Seaway (French: la Voie Maritime du Saint-Laurent) is a system of locks, canals, and channels in Canada and the United States that permits oceangoing vessels to travel from the Atlantic Ocean to the Great Lakes of North America, as far inland as Duluth ...
Around 1500–1800 the first summit level canal to use pound locks in Europe was the Briare Canal connecting the Loire and Seine (1642), followed by the more ambitious Canal du Midi (1683) connecting the Atlantic to the Mediterranean. This included a staircase of 8 locks at Béziers, a 157 metres (515 ft) tunnel, and three major aqueducts.
The locks themselves were made of 2,046,100 cu yd (1,564,000 m 3) of concrete. The quantity of material needed to construct the locks required extensive measures to be put in place to handle the stone and cement. Stone was brought from Portobelo to the Gatun locks, while the work on the Pacific side used stone quarried from Ancon Hill. [8]
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