Open questions: Cheshire

Where sources disagree, MineArchive keeps both accounts rather than picking one; where a fact could not be settled, the record says so. 26 such claims on 11 records. All regions.

Adelaide Mine

• Opened in 1850 and named after Adelaide of Saxe-Meiningen, queen of William IV; the owners were Joseph Verdin and Sons. (disputed)
• Given as roughly nine and a half acres of workings at a depth of around 330 feet. (disputed)
• Given as around fifteen acres by 1896, with rock-salt pillars around ten yards square spaced twenty to twenty-five yards apart, worked under manager Thomas Ward. (disputed)
• A rock-salt mine was sunk in the bottom bed by Woodyatt and Eauchus in 1852 and sold a year or so later to Messrs Verdin. (disputed)
• The last working in the Adelaide Mine was in 1929. (disputed)
• The collapse of the mine created the flashes either side of Ollershaw Lane in 1929. (disputed)

Alderley Edge Mines

• A May 2013 permission-visit report describes Wood Mine's original entrance being blasted shut in 1964 after accidents involving ill-equipped visitors, before the Derbyshire Caving Club reopened it in 1970 with National Trust permission; the passages retain green-coloured water features from copper mineralisation. (uncertain)
• The mines are recorded as having seen numerous accidents and six fatalities after they were closed, the entrances having been left unbarred. Accidents are reported to have stopped after the Derbyshire Caving Club took on the lease in 1969. (uncertain)
• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Alderley Edge' (catalogue OM882, Copper Ore, undated in the catalogue); 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)

Baron's Quay Mine

• The four-mine stabilisation programme is variously reported as costing around £28 million or around £32 million across different sources; neither figure is treated here as more reliable than the other. (disputed)

Crystal Mine, Marston

• 260 tons of picric acid remain in the mine. (disputed)

Danebower Colliery

• The colliery was probably in use with other mines of the Buxton area from 1780 to 1880 and was last worked in 1925. (disputed)
• The colliery was abandoned in 1922 and then reopened while the pillars were robbed between 1926 and 1928. (disputed)
• The chimney served the boiler of a surface haulage engine, with a rope trough leading from the engine bed to the capped shaft. (disputed)
• The chimney was built for a furnace which provided ventilation for one of the colliery's shafts. (disputed)

Hough Hole Colliery

• The mine was officially abandoned at the beginning of 1925 as effectively exhausted; The Story of Rainow, drawing on the recollections of Frederick Vare, the last man to work in it, says working ended abruptly in 1926 when black damp was found. Working may have restarted during the 1926 national strike, as it appears to have done at other small mines in the district. (disputed)

Marston Old Mine

• The Marston pit was first sunk about 1775. (disputed)
• The mine was first worked around 1777. (disputed)
• The top-bed mine was preserved intact until its roof cracked and water began to enter in 1921. (disputed)
• The top-bed mine was abandoned in 1920, flooded along with the bottom-bed mine. (disputed)

Marston Pool Mine

• Opened in 1846, one of the properties of John Thompson junior and Henry Ingram Thompson; a small mine of about 6 acres. (disputed)
• Started in 1850 and abandoned, flooded, in 1939, with workings of 2 hectares; the shafts are filled but open workings remain. (disputed)

Neumann's Mine

• Neumann's Mine's roof collapsed -- most commonly dated to 1873, though other sources give 1877 -- creating Neumann's Flash; this is distinct from the 1880 'Great Subsidence' that created the separate, nearby Ashton's Flash. (disputed)

New Zealand Mine, Marston

• It was reopened or reworked in 1869 and was a small mine of just over 2 acres. (disputed)
• Started in 1870 and abandoned, flooded, in 1908, with workings of 1.3 hectares; the shafts are filled but open workings remain. (disputed)

Poynton Collieries

• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Poynton' (catalogue NW1284, Gees, undated in the catalogue); 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)