page_title: Timeline of Cheshire history
section_title: 20th century
hierarchical_section_title: Timeline of Cheshire history / 20th century
caption_attribution_description: English: Reaseheath Hall, part of Cheshire College of Agriculture at Rease Heath, near Nantwich, Cheshire
context_page_description: The timeline of Cheshire history shows significant events in the history of the English county of Cheshire.
context_section_description: 29 May 1905: Widnes-Runcorn Transporter Bridge officially opened by Sir John Brunner.
  1921: Cheshire School of Agriculture opens at Worleston.
  1926: Imperial Chemical Industries is created.
  1931: Chester Zoo opens.
  1938: Newgate opens in Chester.
  1951: Chester Mystery Plays are revived.
  21 July 1961: Runcorn-Widnes road bridge (later named the Silver Jubilee Bridge) is opened by Princess Alexandra.
  1964: Runcorn New Town is designated.
  1969: First conservation areas designated, including Chester and Nantwich.
  1 April 1974: Cheshire boundaries changed by Local Government Act 1972.  Runcorn and Widnes merge to form the Borough of Halton.
  1982: Norton Priory Museum opens.
  1983: Anderton Boat Lift closes.
  26 February 1993: IRA explosive devices go off at Warrington gasworks.
  20 March 1993:: IRA explosive devices kill two children and injure 54 people in Warrington.
  1 April 1998: Halton and Warrington become unitary authorities.
caption: Cheshire School of Agriculture
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