Latest Images by Elfyn Edwards http://www.geograph.org.uk/ 2010-03-18T17:08:50GMT text/html 2009-07-14T16:16:46GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 52.973254 -3.979105 http://www.geograph.org.uk/photo/1399728 The ruined drum house where zinc and lead would be lowered to the workings by the FR track. text/html 2009-07-14T16:09:24GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 52.973716 -3.978382 http://www.geograph.org.uk/photo/1399714 This is about 500 yards long and connects the northerly adits of this disused lead and zinc mine. text/html 2008-08-24T10:36:48GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 53.190540 -4.080262 http://www.geograph.org.uk/photo/934300 Close to the Ogwen river are the adits and stope of a copper mine which date from about 1765. text/html 2008-08-24T10:27:12GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 53.160903 -4.047266 http://www.geograph.org.uk/photo/934283 This is one of many arsenic flues connected with this mine; the adit is right on the river bank nearby. The ore would be roasted in a calciner then the sublimated arsenic would be scraped off the stone flags that lined the flues. The process was not only dangerous to the men but it polluted the Ogwen and the mine was soon closed in the 1830s. text/html 2008-08-24T10:10:53GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 53.160594 -4.059966 http://www.geograph.org.uk/photo/934264 This arch is the last remaining on the old south workings of Penrhyn Quarry. It supports the incline from the top of the quarry between the upper two drum houses. The incline eventually went over The Cob to the main quarry mills. text/html 2008-08-04T19:02:29GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 52.974394 -3.970072 http://www.geograph.org.uk/photo/909050 The pump storage hydro plant was generating by opening the pipes from the Stwlan dam above. I was astounded at the 'tidal rise'. It was as much as much 2-3 inches a minute and submerged the paths. In the background is the old Ffestiniog railway tunnel which is also submerged. The tidal rise is similar to the Channel Islands which can rise to a spring high tide of 40 feet. text/html 2008-08-04T18:47:43GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 52.973494 -3.975542 http://www.geograph.org.uk/photo/909037 A family of mountain goats proudly troop up above Tan y grisiau reservoir. I counted 15: from little kids to huge males with black swept-back horns. text/html 2008-04-14T15:37:30GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 52.998124 -3.875928 http://www.geograph.org.uk/photo/762906 On a path to the lower workings of Rhiwbach quarry there is a slate fence of which this is a good example of the quarryman's ingenuity with slate. text/html 2008-04-14T15:23:19GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 52.966789 -3.967790 http://www.geograph.org.uk/photo/762871 This is the original railway tunnel that ran from Dduallt station to Tan-y-grisiau. About 20 feet in there is a brick dam with an overflow which holds the water when the tunnel was blocked from the reservoir end. text/html 2008-04-14T15:06:42GMT http://www.geograph.org.uk/profile/18224 Elfyn Edwards 53.181026 -4.037748 http://www.geograph.org.uk/photo/762832 This is one of the copper trial levels on the west side of Y Garth, not far from the old pumping station above Ciltwllan. The tunnel descends quickly and is flooded. There are others close by. Excavations started in 1783 by a Mr. Baker who may have been an agent of the Penrhyn Estate. The site yielded 232 tons of arsenic-pyrities according to David Bick's excellent book on Old Copper Mines of Snowdonia.