The Glyn pits ceased as a working mine in 1932. This picture was taken sometime later when it was an electrically driven pumping station to clear water from both Glyntillery and Hafodyrynys collieries, as well as the Glyn itself. The transformer house for the electrical supply can still be seen on the right of the picture above. The wooden headgear was reported by a coal board engineer as being fifty feet to the wheel spindles, but the height from ground level to the eaves of the winder house is 34 feet, so the readers can judge for themselves.

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Just over the top of the transformer building on the right can be seen the top of the airtight cladding of the upcast shaft. This was necessary to prevent air from entering the fan drift from the top of the shaft, instead of circulating in the workings Before this time there were probably 'Flap' doors on the shaft top, which were lifted up by the ascending cage, and allowed to drop into place again when the cage descended into the mine again. In the centre front of the picture, a tram can be seen on the start of the inclined way to the screens, about a hundred yards away to the right.

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A screen is where the trams of coal are firstly tipped via a (tippler) over a grid in order to remove the very small particles and dust (small coal) from the rest of the coal, leaving the remainder to be carried on a slow-moving belt. People would be stationed on both sides of this conveyor belt, checking and clearing any unwanted foreign objects such as stones, wood, paper or metal leaving clean coal only. In the 2nd 1930s photograph below is a setup of what the end of the process would have looked like, with the coal passing into several awaiting trucks.