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Dyffryn, Llynfi and Porthcawl Railway

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
0-6-0ST
Type and origin
Power type Steam
Builder Slaughter, Grunning & Co.
Specifications
Configuration:
 • 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)
Type and origin
Power type Steam
Builder Slaughter, Grunning & Co.
Specifications
Configuration:
 • 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)
4-4-0ST
Type and origin
Power type Steam
Builder Slaughter, Grunning & Co.
Specifications
Configuration:
 • 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)
Type and origin
Power type Steam
Builder Slaughter, Grunning & Co.
Specifications
Configuration:
 • 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)

In 1861 the Llynvi Valley Railway was opened in Glamorganshire, Wales, to convey mineral products to the Bristol Channel at Porthcawl. It adopted an earlier tramroad, the Duffryn Llynvi and Porthcawl Railway. The Llynvi and Ogmore Railway was opened in 1865, and the two companies amalgamated to form the Llynvi and Ogmore Railway in 1866. At first Porthcawl harbour was an important destination for onward transport, but this soon declined.

The area covered by the two lines combined developed considerably serving collieries and the iron and zinc smelting industries, and the L&OR system was extremely busy in conveying minerals up until 1914. A number of extensions to the system were made, even after takeover by the Great Western Railway in 1873 for management purposes and in 1883 as full amalgamation.

Passengers were carried on parts of the network, but were never dominant except at Porthcawl, which declined as a harbour and arose as a holiday and residential location. As the mineral industries declined after 1945 the railway network followed, but in 1992 the line from Bridgend to Porthcawl was reopened to passenger trains, and that is the principal remaining railway activity on the old L&OR network.

The Llynfi Valley runs north to south, from the high mountains three miles north of Maesteg down to Tondu where it joins the River Ogmore, which itself continues through Bridgend to the Bristol Channel at Ogmore-by-Sea.

In the first half of the eighteenth century the area was entirely rural, but coal outcropped in the ground and was used by farmers, and some was taken away for sale by pack animal. Charcoal had been used for smelting iron but in the second half of the 18th century, coke began to be used instead; limestone was available locally and was used in the process.

Cefn Cribwr had been the site of a blast furnace established by John Bedford in 1780, though that declined after Bedford's death in 1791. William Bryant took over the works in about 1825. Elsewhere though, the industry had been on a small scale. It was in 1826 that the Maesteg Iron Company was founded: the first furnace was blown in 1828 and by 1831 the population of the local hamlet had tripled (Cwmdu, from 968 to 2,880). The Maesteg Iron Company later became known as the Old Works and its foundation started the large scale industrialisation of the process locally.


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