British Waterways Board
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Chief Engineer's Department, Watford
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BWB engineering drawings
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BWB engineering drawings nos 769-1004
BW167/6/7/1/48
"Renewal of culvert 330 yds west from Lock 80, Rickmansworth"
Plans and sections showing new works and coffer dam with records of dippings before dredging in preparation for coffer dam
1964
BW167/6/7/1/48
These records are available immediately for research
2 sheets