Small portable compressed air pumps were used for the removal of water, the make of which was considerable owing to the porous sandstone overlying the workings.

The workings were ventilated using a small compressed air fan sited underground. The air was drawn in through old workings, and flowed out up the main haulage drift. The two mines were entirely separate for ventilation purposes. There was no gas present, and a naked light exemption had been applied for. The battery lamps in use were continued to be used, the advantage of the exemption being that greater flexibility was allowed in working methods and equipment.The mines were manned as follows:

No. 2 mine
1 collier
1 horse driver
No. 2 south mine
1 collier
1 labourer
One deputy covers both mines.

The output from the south mine was about 8 trams a day, giving 40 tonnes a week. This gave an overall output per man shift for this mine of 3.2 tonnes.

The trams were tipped on the surface using a Holman compressed air rotary tipper. The coal slid down into a bunker which was periodically emptied into a lorry. All of the coal was sold for power station use.

No 3 (SO094 039) Link to Google Earth

This location is on the eastern side of the Taff Bargoed valley half way up the mountainside adjacent to the railway to Cwmbargoed Opencast site and almost level with Pentwyn Cemetary to the east in the Darran Valley at Pentwyn.

It is the location of the Dowlais Iron Company Nantyffin Drift.

This was worked in the same manner as Ffynonau Duon No2 but several stalls were worked at one time, all served by a large electric hauler.

Nantyffin Drifts Nos 1 & 2 (Link to GoogleEarth)

Other references given for this site in 1946  are Bedlinog (Brithdir) and Bedlinog (Tyla-du) which was opened in 1927 and closed on 31 March 1956.

This level was re- opened in 1972 under the ownership of Ffynnonau Duon Mines Ltd.

Other references to this mine are as follows:

Until 1930 coal was raised and put into wagons at Nantyffin. At that time the slant at Bedlinog was driven into the Brithdir seam, since when it has dealt with all the output. Nantyffin Slant has been retained for travelling, ventilation and pumping c1950 Courtesy of Tony Cooke.