British Transport Commission: British Waterways
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BTC/BW engineering drawings
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BTC/BW engineering drawings 202-767
BW177/2/6/1/136
"Grand Union Canal Berkhamstead to Birmingham"
Typical cross section of canal showing dredging, typical cross section of bridge showing widening and lowering of sill
3 July 1957
BW177/2/6/1/136
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