Diagram showing PLACE's proposed sealing of Mount Stuart Graving Docks and pipe connection to the Severn Estuary.

The pipe, which would run under the new 'freshwater' lake and then pass through the Cardiff Bay barrage, would maintain the Graving Docks in their tidal condition.

The photograph shows the Inner Harbour area of Cardiff Bay before the new developments began. The site of the new Welsh Assembly, now under construction, is in the lower left hand corner.