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- A - Pre-Vesting Colliery Companies superseded by the National Coal Board - [1672]-1972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/13/4/7
Former Reference	N5/405
Title	Handwritten details of strata found in Broughton borehole
Date	May 1919-Jan 1920
Description	Columns used for date of boring (21 May 1919-17 Jan 1921), total depth bored, size of rotary core used, rotary depth bored, nature of strata, thickness of stata and remarks
Extent	1 file
Level	Item
Repository	Derbyshire Record Office
Archive Creator	Butterley Company
Archive Creator	National Coal Board

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