 It was completed in 1888, and in 1898 the crest level was raised by 0.5 meters.The upstream slope of the wall is pitched with locally quarried diorite blocks 450 mm thick.The curtilage includes the boundary of the grounds owned by Sydney Water Corporation and the components within it, namely;

The state heritage listing includes Prospect Reservoir, landscape elements and all associated structures, including pumping stations, to the property boundary.