Open questions: West Yorkshire

Where sources disagree, MineArchive keeps both accounts rather than picking one; where a fact could not be settled, the record says so. 32 such claims on 21 records. All regions.

Booth Town Pit

• A Boothtown Colliery beneath Swales Moor, recorded in 1842, closed in 1875. (uncertain)

Combs Colliery

• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Combs' (catalogue 2047, Old Hards, dated 1887); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Crigglestone Colliery

• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Crigglestone' (catalogue NE656, Low Haigh Moor, dated 1969); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

East Ardsley Colliery

• The memorial on Moor Knoll Lane remembers the men who worked and died at East Ardsley Colliery, 1872 to 1966. (disputed)

Flockton Collieries

• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Flockton' (catalogue GCR222, Flockton Thin, dated 1849); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Glasshoughton Colliery

• The Twentieth Century Society's own record of the pithead baths scheme independently confirms the colliery's ownership (Glass Houghton and Castleford Collieries, Ltd.) and its capacity (3,006 men), but gives the opening date as 6 June 1931 rather than the 30 March 1931 already on this record; both dates are kept as the sources disagree and neither has been reconciled. (disputed)

Gomersal Colliery

• The shafts were sunk in 1911 and the colliery opened in 1916. (disputed)

Hostingley Colliery

• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Hostingley' (catalogue GCR107, Flockton Thin (Or Mill Bank Bed), dated 1873); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Ingham Colliery

• NMRS's Thornhill Colliery history dates the start of sinking to 3 August 1875; its account of the 1947 explosion says the colliery had produced coal from about 1860. (disputed)
• NMRS's account of the explosion gives 12 killed and one injured; its Thornhill Colliery history gives 11 killed and one injured. (disputed)

Ledston Luck Colliery

• The Durham Mining Museum gives 1909 as the opening, records 98 people employed in 1910 with the note 'Sinking', and has no returns at all before then; Engole's account has the sinking begun in 1909 with Lady Wheler cutting the first sod. (disputed)
• Both of the exploration accounts read for this record say the pit was sunk in the 1870s, and one adds that it later formed part of the super-pit of interlinked workings around Selby. Neither cites a source and the wording is close enough between them to suggest one copied the other. (disputed)

Methley Junction Colliery

• The colliery opened in 1854. (disputed)
• Burnley sold the colliery to Briggs and Co. in 1859. (disputed)
• The Briggs company purchased Methley Junction Colliery in 1866 from the Burnley interest. (disputed)

Newmillerdam Colliery

• The closure is also dated March 1982. (disputed)

Peckfield Colliery

• The first sod for the two shafts was cut in October 1874 by Joseph Cliff, senior partner of the Micklefield Coal and Lime Company. (disputed)
• Peckfield was sunk between 1872 and 1875. (disputed)

Robin Hood Colliery

• An explosion at Messrs Charlesworth's Robin Hood colliery in which a boy was instantly suffocated is reported as 16 February 1836 by one account and 16 February 1838 by another. (disputed)
• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Robin Hood' (catalogue 5283, Yard, dated 1908); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Sharlston Colliery

• One source records around 1,000 miners employed in 1984; another gives a peak of around 2,200 men working chiefly the Top Haigh Moor seam. Neither source clarifies which period each figure covers. (uncertain)

Shuttle Eye Colliery

• Engole gives coal got on a small scale from 1837 and the deep colliery begun in the 1850s by Benjamin Lockwood, licensee of the Blacksmiths Arms, with Joshua Ellam, Job Lockwood taking over after 1882 and partnering Benjamin Elliott. (disputed)

Snydale Colliery

• The Featherstone Rovers Archive gives the borehole as 1851; the same author's account at Featherstone's Three Collieries gives 1861. Both agree the shafts were sunk from 1863. (disputed)
• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Snydale' (catalogue NE423, Haigh Moor, dated 1948); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Upton Colliery

• Work started on the site in 1924 and two shafts were sunk through 1925 and 1926 to between 260 and 300 yards, but preliminary works meant no coal was raised until 1927. (uncertain)
• The colliery was run by the Upton Colliery Company (Bolckow, Vaughan and the Cortonwood Company) from 1924 to 1939, by Dorman Long from 1939 to 1947, and by the National Coal Board from 1947 to 1964. (uncertain)
• The National Coal Board opened new pit-head baths costing £115,000 in 1952 and spent a further £500,000 in an effort to raise saleable output from 24 to 27 hundredweight a shift. (uncertain)
• An explosion in the Barnsley seam on 20 May 1964 led to the colliery being evacuated and the area sealed, rendering the mine unworkable; with bad geology in the seams the site closed in November 1964. (uncertain)

Victoria Colliery, Stanley

• Twenty lives were lost. (disputed)

Walterclough Colliery

• A Walter Clough pit at Shibden, Halifax, was sinking from 1873 to 1878. (uncertain)

Whitwood Colliery

• The Pitwork account makes the Silkstone shaft 415 yards deep. The company's own history describes the Silkstone pit as sunk for a prospective output of 1,000 to 2,000 tons a day from 440 yards, a figure likely to be the working depth rather than the shaft. (disputed)
• The Durham Mining Museum's Pitwork account gives the two shafts as sunk between 1871 and 1878. Altofts Cricket Club's history of the pit gives the sinking as 1874 with coal reached on 14 December 1876, which falls inside that span rather than contradicting it. (uncertain)