Dam, valve tower, bridge and outflow on Pontsticill Reservoir

Long dam of clay core and earth bund construction, with pitched stone revetment to inner face of embankment and full length stone wall above, inner face of sloping earth bank and low stone wall supporting roadway above.

Valve tower, rock-faced coursed stone with copper-sheet spire. Gothic style octagonal tower rising from the water on octagonal base. Lower masonry is corbelled out on stepped corbels with pointed arches between. Moulded plinth, base stepped forward on W for piers of porch to square-headed door with renewed gabled timber hood. Narrow lancets on other sides with stone voussoirs and hoodmoulds, stepped eaves. Tall octagonal roof in 2 pitches, clad in copper sheet, with iron vane.

Bridge runs from W side of reservoir to abutment in front of door and is carried by one stone pier with blockwork above. Bridge is of lattice steel type. Abutment on land end has walls of rockfaced stone. Outflow is a convex-sided large funnel in the reservoir, below the bridge, with concrete ribs and lining of brick or stone.