11' – 8¼", 12' – 0" and 12' – 6" Int[ernal] Dia[meter] Cast Iron Tunnels

Blueprint, scale: ½" – 1' & full size.

Details

Extent:
1 Drawing
Identifier:
P&R/3/18
Access:
. All requests for access to this collection should referred to the NRM Archives Manager for approval

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