Rassa Railroad
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The Rassa Railroad was a horse-drawn tramroad in south Wales, running between Sirhowy Ironworks and Beaufort Ironworks, with connections also to the Trefil Rail Road and the Ebbw Vale Ironworks. It was later served with a tram engine.

The Rassa Railroad opened in 1794 as an edge railway of approximately 3 ft 4 in (1,016 mm) gauge.[1]: p.57 It was laid out by Thomas Dadford, engineer of the Monmouthshire Canal Co., which owned the line.[1]: p.201 After a few years it was converted to a 4 ft 2 in (1,270 mm) gauge plateway.[1]: p.201 A tram engine was used on the route from 1829.[1]: p.201 At some point the owner of the Rhymney Ironworks also secured running rights over the Rassa line.[1]: p.213