Scottish shale Scottish shale

Polbeth No. 20 mine

West Calder, Midlothian
Local authority:
West Lothian
Seams worked:
Fells Shale
c.1880? Reopened c.1900?
Pre-1895 & 1906?
Current status of site:
Contractor's yard within an industrial estate
Regional overview:


Inclined shaft to the Fells shaft

Serving Addiewell Oil Works

The history of No. 20 Mine is uncertain; from the numerical sequence it might be imagined that No. 20 opened in the late 1870's, although the 1895 OS map shows only an "old shaft" on the site subsequently developed as the "Slant Mine" .

The mine dipped steeply to the south west, exploiting Fells Shale to the east of West Calder. A cross cut mine appears to have provided access to an area of Fells Shale to the east of Harburn Road. The workings were linked to those of Polbeth No. 8 Pit.

Mapped by the Ordnance Survey of c.1895, showing only "old shaft" on the site of No. 20 Mine.

  • Location & workings at Polbeth No.20 mine
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  • Detailed maps
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  • External references
    • Coal Authority Mine Abandonment Catalogue No. 4913, showing workings in the Addiewell or Fells Shale from Polbeth No. 8 and Polbeth No. 20 Slant Mine, abandoned in 1906