via Talybont-on-Usk. Passenger traffic ceased on 31 December 1962 (the loop line from White Hart to Gwern y Doman via Fountain Bridge closed on 17 September 1956), but the line remained in freight use as far as Bedwas until the closure of Bedwas Navigation Colliery in 1985. Nature has since engulfed the two platforms of the old station, and most of what remains of the former trackbed between Trethomas and Machen has been updated by Sustrans as a cyclepath/walkway which joins Route 4 of the National Cycle Network at Graig-Y-Rhacca. Nothing remains of the colliery, which closed in March 1985 during the UK miners' strike (1984-1985). The British Benzol coke ovens, which closed on Christmas Eve 1986, located at the top of upper Navigation street next to Tynywern Terraces, were aptly named 'The White City' mainly because the streets and houses were always dirty due to the coke ovens being so close and the coal dust stirred up by the emptying of the wagons into the hoppers. The colliery and what was termed 'The Plant' closed after the 1984/85 miners' strike. The ground on which the colliery stood is yet to be re-developed. The ground has reportedly high concentrations of Benzines in the soil at present and therefore it would be dangerous to re-use in its present condition. This is one major blight on the landscape. Caerphilly County Borough Council inherited most of the land and face a difficult situation; cleaning up the land would more than likely cost more than what the land is worth, so restoration work in the future is unlikely. It is worthy of note that, during World War II, German aircraft actually dropped bombs, both incendiary and active, on the top of Caerphilly Mountain (visitors to the area will find it still full of craters) mistaking it for the Bedwas/Trethomas mountain where the intention was to eliminate the National Benzol 'plant' which produced aviation fuels from the coal as by-products. Since the demise of the collieries further up the valley, the Rhymney River, which passes through Trethomas, has gone from being a contaminated, black monstrosity, to a clean, aromatic river, now teeming with wildlife and fish after many barren years. The 'Fountain Bridge' on the main road between Trethomas and Waterloo was so named because, for many years, prior to road alterations, there was a free running spring at the roadside close to the site