Accessibility

Font Size

100% 150% 200%

Background Colour

Default Contrast
Close Reset

GRWYNE FAWR, RESERVOIR

Site Details



NPRN 267350

Map Reference SO23SW

Grid Reference SO2311030770

Unitary (Local) Authority Powys

Old County Brecknockshire

Community The Vale of Grwyney

Type of Site RESERVOIR

Broad Class WATER SUPPLY AND DRAINAGE

Period Modern

Site Description An Act of Parliament in 1910 allowed for the creation of the Abertillery and District Water Board and the construction of the Grwyne Fawr reservoir. The reservoir was needed to supply fresh water to the growing settlements in Monmouthshire. The construction of the reservoir began in 1912 and was finally completed in 1928.

The stone-built dam is 52.7 metres (173 ft) high and the mean reservoir height is 525.8 metres (1725 ft) above sea level with a 35 kilometre (22 mile) switchback to Abertilleray and Cross Keys. The contractors 90 centimetre (3 ft) gauge railway from Llanfihangel Crucorny operated the highest adhesion traction railway in the UK, rising to 548.6 metres (1,800 ft). The track bed has been re-surfaced to form a road. The reservoir is still in use.

Claire Parry, RCAHMW, 21 June 2011.

Sources:
Tipper Rev DA, 1975, Stone and Steam in the Black Mountains
J.J.Hall, Trysor, 4 February 2008
A Guide to the Industrial Archaeology of South East Wales, AIA, 2003

Digital Images

Archive Records

Associated Sites