| Description | At front, for Kirkby Colliery, 7 Dec 1912-2 Sep 1913; in middle, section of strata sunk through at Lowmoor Colliery, completed 2 July 1915; three-quarters of way through, section of strata sunk through in the Kirkby South Pit, undated; near end, section of strata sunk through in the Kirkby North Pit from Top Hard Coal, 1 Nov 1912-10 Jan 1914. |