Glyndyle Graigola Colliery

Overview

A small level at Trebanos near Pontardawe, also called Five Boys, worked for the Graigola seam in 1925-27 and again in 1930-35 by the Glyndyle Graigola Colliery Company.

History

Glyndyle Graigola Colliery, also called Five Boys, was a small level at Trebanos, near Pontardawe in the Swansea Valley. It was worked by the Glyndyle Graigola Colliery Company of 2 Bowens Terrace, Trebanos, for manufacturing and steam coal from the Graigola seam.

The first level, the Glyndyle, was opened in 1925 and worked until 1927. The No. 2, or Glyndyle Graigola, was opened in 1930 and worked until 1935; it employed 13 men in 1933 and, in 1934, six underground and four at the surface, with H. Griffiths as manager.

The Graigola seam was abandoned in 1936, and the plans of the Glyndyle, Glyndyle Graigola or Five Boys workings are dated that year.

Geology

The Graigola seam.

Workings

Two levels: the Glyndyle (1925-27) and the No. 2 or Glyndyle Graigola (1930-35).

Closure

The No. 2 level closed in 1935 and the Graigola seam was abandoned in 1936.

What remains

Unknown.

Redevelopment

Unknown.

Recorded claims

Individual factual claims, each attached to the source(s) that support it below. Where sources disagree, both are kept.

• Also called Five Boys. ^1,2
• The Glyndyle was opened in 1925 and worked until 1927; the No. 2 was opened in 1930 and closed in 1935. ¹
• Employed 13 men in 1933. ¹
• The Graigola seam was abandoned in 1936. ^1,2

Photographs & further reading

Sources

1. (primary) Small collieries in the Pontardawe area — Northern Mine Research Society
2. (primary) Glyndyle or Glyndyle Graigola or Five Boys Mine Plans (Mining Remediation Authority plan 11767, Graigola, 1936) — British Geological Survey / Mining Remediation Authority

Record created: 15 September 2026 · Last researched: 9 October 2026