A new drift was also being driven to developed the first quality Black Vein coal seam at Long Work pit but it was not proving satisfactory despite an estimate of 600,000 tons being available under lands leased north of Fochriw pits, and it was also stated that a much larger area than this estimate may contain the Black Vein seam in a workable condition.

Production was estimated at a daily output of 200 tons over a period of 10 years.

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Big Coal Pit

The shaft was sunk 178 yards to the Big Coal (Six Feet) seam.

Since there is no mention of this pit in the 1894 report, it is reasonable to assume that it had, by this date, ceased to operate.

A Dowlais Iron Company report dated 10 July 1863 compiled by a W Jenkins, advises that the average length of underground haulages from pit bottom to the collier’s working faces was 93 chains (2046 yards).  

Another D.I.C report dated 21 August 1863 advises that the vertical height of the pit was 180 yards (540 feet)and the vertical height of the drift was 130 yards (390 feet)  giving a total height of 310 yards (930 feet).

This pit was listed up to and including 1883

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