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Dol-y-mynach Tunnel: Nant Gwyllt Aqueduct, Elan Valley Water Scheme

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NPRN261432
Map ReferenceSN96SW
Grid ReferenceSN9081062680
Unitary (Local) AuthorityPowys
Old CountyRadnorshire
CommunityRhayader
Type Of SiteAQUEDUCT
PeriodModern
Description
1. Site of Elan aqueduct known as 'Dol-y-mynach Tunnel'. In field only marked by early 20th century red brick suspension bridge. Square 40cm wooden box on red brick support pillars on either bank of stream. Runs N-S. (RSJ 2000)
2. The 1 mile 437 yard long Dol-y-mynach Tunnel (inlet (S) end is nprn 309538, outlet (N) end is nprn 261172), carries water from Dol-y-mynach Reservoir (nprn 309539) to the Foel Valve Tower (nprn 32527), thereby making available the waters of the Claerwen River to the Scheme (nprn 96459).
B.A.Malaws, 28 November 2003.