Topography Brecon and Merthyr Tydfil Junction Railway

the pontsarn viaduct 455 feet (139 m) long , 92 feet (28 m) height, whilst cefn coed (or pontycapel) viaduct 770 feet (230 m) long height of 115 feet (35 m).

torpantau tunnel through beacons 667 yards (610 m) long. @ elevation of 1,313 feet (400 m), highest railway tunnel above sea level anywhere in britain. exiting south-east portal of tunnel, line descended 7 miles (11 km) along 1:38 (2.6%) gradient side of glyn collwyn , (later: 1931) talybont reservoir.

talyllyn tunnel situated @ west end of former talyllyn station, 5 miles (8.0 km) east of brecon. 674 yards (616 m) long, , built in 1816 hay railway.

location list, brecon dowlais

brecon mount street (n&b station); opened 3 june 1867; closed 1874;
brecon free street; opened 1 march 1871; closed 31 december 1962;
watton (on spur); opened 23 april 1863; closed 1 march 1871;
heol lladron junction; convergence of watton spur;
groesfford halt; opened 8 september 1934; closed 31 december 1962;
talyllyn tunnel; 674 yards;
talyllyn brynderwen; opened 23 april 1863; closed 1 october 1869;
talyllyn junction; opened 1 october 1869; closed 31 december 1962;
talyllyn east junction;
talybont; opened 19 march 1863; renamed talybont-on-usk 1898; closed 31 december 1962;
pentir rhiw; opened april 1897 limited use; closed 31 december 1962;
torpantau tunnel; 667 yards;
torpantau; opened 18 june 1863; closed 31 december 1962;
dolygaer halt; opened 18 march 1863; closed 31 december 1962;
pontsticill junction; opened june 1868; closed 31 december 1962;
dowlais; opened 19 march 1863; renamed pant(glam) 1869; closed 31 december 1962;
pantysgallog halt; opened 1 october 1910; renamed pantysgallog halt high level 1950; closed 2 may 1960;
dowlais; opened 23 june 1869; renamed dowlais central 1924; closed 2 may 1960.

merthyr loop line

pontsticill junction; above;
pontsarn; opened june 1869; closed 13 november 1961;
cefn; opened 1 august 1867; renamed cefn coed 1920; closed 13 november 1961;
morlais junction; convergence of lnwr line;
heolgerrig halt; opened 31 may 1937; closed 13 november 1961;
cyfarthfa junction ironworks lines;
ynysfach junction;
rhydycar junction.




^ holland 2013, p. 184.
^ cite error: named reference barrie invoked never defined (see page).
^ cite error: named reference baughan invoked never defined (see page).