Deganwy Marina Construction, Conwy, North Wales

A boating marina was built adjacent to an existing quay, as part of a prestige housing and hotel complex.

The work involved:

• Construction of a rock breakwater projecting 170m into the environmentally sensitive River Conwy estuary
• Formation of 70m x 250m sheet steel pile containment structure
• Excavation to formation level within the steel-piling box, with unsuitable estuarine silt being removed from site to tip
• Use of sand and gravel to raise the level of the surrounding development land

A pre-cast concrete harbour wall surmounting the piling was completed with an insitu concrete capping beam.

In addition, a dock gate was constructed along with new access roads, a level crossing and associated drainage and infrastructure works.