Hidlwyr dŵr Cwm Elan yn dangos pedestal a Thŷ...
Y Trên Post, Cwm Elan
Locomotif trên o'r enw Elan, Marning and Co,...
Trên locomotif o'r enw Nant Gwyllt, Cwm Elan
Trên o'r enw Coel gyda'r Fan Arolygu a Mr....
Craeniau ar argae Caban Coch, Cwm Elan yn ystod...
Tŵr Falf Foel, Cronfa Garreg-ddu, Rhaeadr, Cwm...
Dol y Mynach Dam, Elan Valley under...
Craig Goch dam, Elan valley under construction...
Elan Valley Filter Beds near Caban Coch Dam,...
Fred Beatrup, Rhingyll yr Heddlu, Rhaeadr
Trip Ysgol Sul c1890-1900, Cwm Elan
The Little Chapel in Elan Valley, William R. Stone
Tan y Foel, Eustace Tickell
Caban Coch dam, Elan Valley Laying of the...
Caban Coch interior of cement cooling shed.
Caban Coch construction, Elan Valley
Dechrau adeiladu argae Caban Coch, Cwm Elan
Craig Goch Dam Main Trench, Elan Valley
Construction of Caban Coch Dam
Old Nantgwyllt Church
Warley Reservoir interior
Elan Valley Aqueduct Teme Bridge Leintwardine
Elan Valley Aqueduct Stour Canal crossing.
Ithon aqueduct looking west.
Frankley Reservoir stream diversion and east wall.
Frankley Reservoir pipe store and Masons'...
Frankley Reservoir main diversion wall looking...
Frankley Reservoir South outlet well.
Frankley Reservoir inlet weirs
