Open questions: Flintshire

Where sources disagree, MineArchive keeps both accounts rather than picking one; where a fact could not be settled, the record says so. 8 such claims on 6 records. All regions.

Bryngwiog Lead Mine

• Sixteen men perished when water from old workings flooded the mine on Saturday 22 February 1862. (uncertain)
• The dead were drawn from villages across Halkyn Mountain — Moel-y-Crio, Lixwm, Rhewl, Rhesycae, Foel, Llaneurgain and Cilcen among them. (uncertain)
• The villages around the mine have a lead-mining history of centuries; several buildings in the Wern-y-Gaer area of Rhosesmor are more than three hundred years old. (uncertain)

Hendre Mine

• Cadw's listing puts the Taylor's Shaft engine house at probably 1896, the date on the adjacent boiler stack. A 2006 field note instead describes it as built during the First World War to revive the lead mines. (disputed)

Leeswood Green Colliery

• The Annual Register says notice of a reduction for turning out dirty cannel took effect on the 17th and that Young was ejected on the 19th; the Leeswood Community account says the notice was posted on 1 May, that the reduction was due to start on 17 May when three hundred men did not turn up, and that he was confronted two days later. (disputed)

Mostyn Colliery

• Accounts differ on how long coal had been worked when the 1884 flood ended it: over 620 years by one reckoning and 823 years by another, the difference resting on which thirteenth-century start date is taken. (disputed)

Pen-y-Bryn Mine

• The Pen-y-Bryn shaft was 925 feet deep. (disputed)

Point of Ayr Colliery

• An underground explosion in 1899, caused by a flying wedge chipping a safety lamp's glass and igniting methane, killed colliery manager Lewis Jenkins, his deputy Samuel Pearson, and brothers John and Ernest Parry, among others. (uncertain)