Record

NCB - National Coal Board, later British Coal Corporation - 1574-1994
- A - Pre-Vesting Colliery Companies superseded by the National Coal Board - [1672]-1972
  - BUT - Butterley Company Colliery Offices - 1857-1960
    - 13 - Butterley Company Colliery Offices records on the development of collieries - 1895-1947
      - 4 - Butterley Company Colliery Offices correspondence files on the building and development of Ollerton Colliery, Nottinghamshire - 1917-1946

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Archive Reference / Library Class No.	NCB/A/BUT/13/4/20
Former Reference	N5/229
Title	Butterley Company correspondence file on boreholes in the Ollerton Coalfield
Date	Apr 1922
Description	With plan of boreholes, showing contours of Top Hard Coal and sites of collieries surrounding the Ollerton Coalfield, 2 Apr 1922 and copies of section of the No. 1 Shaft at Clipstone belonging to the Bolsover Colliery Company Limited, showing thickness of strata, description of strata, and total depths of strata from surface down to Top Hard Coal, Apr 1922
Extent	1 file
Level	File
Repository	Derbyshire Record Office
Archive Creator	National Coal Board

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