Pre-industrial dredging Rosmolens en krabbelaars: baggeren ... - Vssd

Pre-industrial dredging Rosmolens en krabbelaars: baggeren ... - Vssd

22 Het grote baggermolenboek

3 Baggerbeugel.

Dredge bag or hand drag, a leather or woven bag on a long pole

4 Beugelaar

The Dredger; the man who worked with the dredge bag

The Netherlands’ main port in the early Middle

Ages was Dorestad, some 100 miles up the river

Rhine (now Lek) from the sea. While shipbuilding

techniques evolved and ships’ sizes increased,

from, say, the 50 tons flatbottomed clinker built

cog to the 150 tons keel ships of the 16th century,

mariners choose deeper ports closer to the sea,

which in the 17th century made Amsterdam the

Dutch main port, with Rotterdam and Dordrecht

as runners up. Moving further to seaward was

unpractical, but silting became an ever bigger

problem while ships’ sizes continued to increase.

Logical therefore that the 16th century saw the

introduction of more sophisticated dredging

equipment than the hitherto predominant dredge

bag (fig. 3 and 4) (Dutch ‘baggerbeugel’: a leather

bag on a long pole), which even in the 20th century

was still widely used, for instance for relieve work

during the 1930s Great Depression, when many

unemployed people worked for their dole through

maintenance work of canals.

A number of improved dredge bags were

patented, such as the haalschouw by famous

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