British Transport Commission: British Waterways
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Records relating to all divisions
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BTC/BW engineering drawings
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BTC/BW engineering drawings 202-767
BW177/2/6/1/317
"Shropshire Union Canal, typical section of in-situ walling"
Section annotated "Copied form North Western Division Drawing no 493/1"
1960s
BW177/2/6/1/317
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