Tideway is an international offshore contractor, specialised in dredging and rock placement operations on a worldwide basis. Tideway is developing its core business - dredging and rock placement - and at the same time extending and diversifying its range of hydraulic engineering and maritime construction activities so as to offer integrated solutions for such projects that require a multidisciplinary approach. Because of the close co-operation we enjoy with other members of the DEME Group, Tideway has access to both substantial expertise and an extensive fleet of ships. Tideway's specialised vessels for stone placement are the D.P. fallpipe vessels "Rollingstone" (loading capacity 11,500 tons), "Seahorse" (loading capacity 18,000 tons) and "Flintstone" (loading capacity 20,000 tons). These fully certified Class II D.P. vessels can operate within 500 metre zones and close to platforms and other offshore structures without tug assistance. Activities: Trench dredging/backfill and landfall/outfall construction for the installation of oil and gas pipelines Construction of water/sewage intake or outlet pipeline structures Pre-sweep/dredging operations to level the sea bottom prior to pipeline installation Precise rock dumping operations, both in shallow waters and in waters to depths of 1,000 m for protection Stabilisation/ballasting/protection of pipelines, freespan correction and protection of platform feet against scouring and erosion Dredging and land reclamation projects Land waterway development navigation channel recreation Port construction projects Presweeping Seabed preparation Shore approach dredging Cable laying