Llynvi and Ogmore Railway

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Llynvi and Ogmore Railway
Locale Wales
Dates of operation 1861–1873
Successor Great Western Railway
Track gauge 4 ft 8 12 in (1,435 mm) and 7 ft (2,134 mm) Brunel gauge
Length 27 miles (43 km)
Headquarters Tondu
Llynvi and Ogmore Railway
originally Duffryn, Llynvi and Porthcawl Railway
to Glyncorrwg
South Wales Mineral Railway
to Tonmawr
Cymmer Viaduct
Rhondda and Swansea Bay Railway
to Port Talbot │ to Treherbert
West Junction
Cymmer Afan
Abergwynfi Colliery
Cymmer Tunnel
1591 yd
1455 m
Caerau Colliery
Port Talbot Railway and Docks Company
to Pontyrhyl
Maesteg (Neath Road)
to Port Talbot
Maesteg Castle Street
Maesteg (Ewenny Road)
Troedyrhiew Garth
Ogmore Valley Railway
to Brynmenyn
South Wales Main Line
to Bridgend
Cefn Junction PTR&DCo
Kenfig Hill
South Wales Main Line
to Bridgend
Pyle Junction
South Wales Main Line
to Swansea
Cornelly Quarry
Nottage Halt
Nottage Tunnel
63 yd
58 m

The Llynvi and Ogmore Railway (originally the Duffryn, Llynvi and Porthcawl Railway) was formed by the merger on 1 July 1866 of the broad-gauge Llynvi Valley Railway and the standard-gauge Ogmore Valley Railway. It served Porthcawl, Bridgend, and Tondu in Glamorgan, Wales, along with various branches.

The company name was spelt Llynvi using the Anglicised phonetic spelling popular at the time, rather than the correct Welsh Llynfi.


  • 1825 The horse-drawn Duffryn Llynvi and Porthcawl Railway (DLPR) authorised by Act of Parliament. Track gauge was as 4 ft 7 in (1,397 mm)[1]
  • 1828 DLPR opened from Porthcawl to Garnlwyd in the Llynfi Valley
  • 1828 The horse-drawn Bridgend Railway authorised by Act of Parliament
  • 1830 DLPR completed to its northern terminus at Coegnant near the head of the Llynfi Valley
  • 1847 Llynvi Valley Railway (LVR) authorised by Act of Parliament and merges with DLPR
  • 1861 Horse-drawn LVR re-routed and re-opened as the steam-hauled, broad gauge Llynvi Valley Railway
  • 1863 Ogmore Valley Railway authorised by Act of Parliament
  • 1865 Ogmore Valley Railway opened from Nantymoel to Tondu
  • 1866 Llynvi and Ogmore Railway formed by merger
  • 1868 All lines now mixed gauge
  • 1872 Broad gauge abandoned
  • 1877 Cymmer Tunnel opened to connect with the Afan valley
  • 1883 Amalgamated into the Great Western Railway as part of the Maesteg Line
  • 1886 Llynvi Valley Extension (Great Western Railway) to Abergwynfi opens
  • 1958 Ogmore Valley Railway closes (Bridgend-Nantymoel 5 May 1958)[2]
  • 1960 Line to Abergwynfi closes
  • 1965 Branch to Porthcawl railway station closes in the Beeching Axe
  • 1970 Passenger service between Cymmer (Afan) and Bridgend withdrawn
  • 1971 Cymmer Tunnel closed to all rail traffic
  • 1973 Cefn Junction and Signal Box closes


Broad gauge 0-6-0ST[edit]

Type and origin
Power type Steam
Builder Slaughter, Grunning & Co.
 • Whyte 0-6-0ST
Gauge 7 ft (2,134 mm)
Driver dia. 4 ft 6 in (1,372 mm)
Wheelbase 15 ft 5 in (4,699 mm)
Cylinder size dia × stroke, 16.5 in × 24 in (419 mm × 610 mm)
  • Ada (1862–1868)
  • Una (1862–1868)

The railway owned two 0-6-0STs for goods traffic. Built by Slaughter, Grunning and Company, they were similar to the South Devon Railway Dido class built at around the same time.[3]

In 1868 they were exchanged for standard gauge locomotives from the West Cornwall Railway, which had recently been rebuilt to allow broad gauge trains to run through from the Great Western Railway to Penzance.

In 1876 Ada and Una became GWR 2146 and 2147 respectively. They were withdrawn in 1884 and 1886.

Broad gauge 4-4-0ST[edit]

Type and origin
Power type Steam
Builder Slaughter, Grunning & Co.
 • Whyte 4-4-0ST
Gauge 7 ft (2,134 mm)
Leading dia. 3 ft 6 in (1,067 mm)
Driver dia. 5 ft 6 in (1,676 mm)
Wheelbase 18 ft 0 in (5,486 mm)
Cylinder size dia × stroke 16.5 in × 24 in (419 mm × 610 mm)
  • Rosa (1863–1868)

The railway owned a single 4-4-0ST passenger tank locomotive. Built by Slaughter, Grunning and Company, it was similar to the South Devon Railway Eagle class.

Rosa was also exchanged for West Cornwall Railway rolling stock in 1868. It was then rebuilt as an 0-6-0ST, making it similar to Ada and Una.

It became GWR 2145 and was withdrawn in 1885.

Standard gauge[edit]

Twelve Lynvi and Ogmore Railway locomotives were acquired by the Great Western Railway in 1873 and renumbered 915 to 926.


  1. ^ Duffryn Llynvi and Porthcawl Railway gauge
  2. ^ Railway Magazine June 1958 p. 433
  3. ^ Sheppard, Geof (2008). Broad Gauge Locomotives. Noodle Books / Broad Gauge Society. p. 71. ISBN 978-1-906-419-09-7. 
  • Reed, P.J.T. (February 1953). White, D.E., ed. The Locomotives of the Great Western Railway, Part 2: Broad Gauge. Kenilworth: The Railway Correspondence and Travel Society. ISBN 0-901115-32-0. OCLC 650490992. 
  • MacDermot, E T (1931). History of the Great Western Railway, volume II 1863-1921. London: Great Western Railway. 
  • Waters, Laurence (1999). The Great Western Broad Gauge. Hersham: Ian Allan Publishing. ISBN 0-7110-2634-3. 

External links[edit]