Occasionally a more lightly defended embanked enclosure, the bailey, adjoined the ringwork. The word "bund" means an embankment or an embanked quay. In East-Anglia the embanked marshes are also known as Fens. Grattan Street was opened along the quay that had been embanked. The railway, being tunnelled and embanked, skirts the foot of the cliffs. Large tracts of tidal marsh have been embanked and artificially drained. The new castle had a concentric pentagonal plan, with thick, embanked walls. The embanked rear lip of the trench was called the parados. To protect the surrounding low-lying land from flooding by the river, the channel was embanked. Some 30% is embanked reservoir or low-lying flood plain therefore immune against building. Beverley Road station was a two-storey building with the upper storey accessing the embanked track.