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| in.| ft.| | | | | |Diameter of | Projected |Cost per | in | Mile. | operation. | Plant. | progress. | ------------------------+-------------+--------------+-------------+-------- | Miles. | £ | £ | £ | Miles. | £ | | | Per mile | Per mile | Per mile | per day. | trains. | capital. --------------------------------------+----------+------------+---------- | £ | Miles.