Madehow

http://www.madehow.com/Volume-6/Canal-and-Lock

Leonardo da Vinci invented the mitre gate in 1480. Two gates, each more than half as wide as the lock, swing on vertical hinges. In the open position, they are flush with the lock's walls. In the closed position, they meet in a V pointed upstream so that the higher water level presses against them to promote a tight seal.

Fens Link
 

Precursors

Although using a slightly different route, there are echoes of plans made in 1809 to link the waterways.

Two schemes were proposed, one which would have created a canal from Stamford to the Oakham Canal, 11 miles (18 km) due west, with a link from Stamford to the Nene at Peterborough, and a connection from near Market Deeping on the Welland, and a rival scheme to link Stamford to the Grand Junction Canal, both of which included a connection to the South Forty-Foot Drain.

Both were put before Parliament in 1811, but neither met with any success. The idea was raised again in 1815 and 1828, but no further action was taken.[6]

 

 

 

 

 

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