Elan Valley Aqueduct Teme Bridge Leintwardine
Elan Valley Aqueduct Stour Canal crossing.
Frankley Reservoir filters
Frankley Reservoir Curved Wall looking East.
Deepwood Siphon Outlet
Elan Valley Aqueduct pipe.
Elan Valley Aqueduct Wye Siphon Lowering pipe.
Elan Valley aqueduct tube being inserted.
Elan Valley Aqueduct Teme Bridge Leintwardine...
Elan Valley Aqueduct Rhayader conduit cut and...
Elan Valley Aqueduct Nantmel Dingle Crossing North
Elan Valley Aqueduct Maes y Gelli construction.
Elan Valley Aqueduct. Knighton Tunnel workings.
Elan Valley Aqueduct Downton syphon inlet
Elan Valley Aqueduct construction
Elan Valley Aqueduct Carmel looking East
Elan Valley to Birmingham Aqueduct 62 M 60 CHS...
Plan of Pinged Marsh, Kidwelly
Pontycysyllte Aqueduct, Llangollen, c.1890
CHIRK AQUEDUCT, LLANGOLLEN CANAL;ELLESMERE...
PONTCYSYLLTE AQUEDUCT, ELLESMERE CANAL...
Pontcysyllte Aqueduct