Surrey Docks North tube station Surrey Docks North tube station Surrey Docks North was an authorised underground railway station planned by London Underground but never built. It was to be located in Rotherhithe and named after the Surrey Commercial Docks in the London Borough of Southwark, in east London as a station on an unbuilt extension of the Jubilee line to Woolwich Arsenal. Plans for a new underground line connection north-west and south-east London via the West End and the City of London were first considered in the 1930s. They were developed during the 1950s and 1960s until a plan for the Fleet line established
Underground power station Underground power station An underground power station is a type of hydroelectric power station constructed by excavating the major components (e.g. machine hall, penstocks, and tailrace) from rock, rather than the more common surface-based construction methods. One or more conditions impact whether a power station is constructed underground. The terrain or geology around a dam is taken into consideration, as gorges or steep valleys may not accommodate a surface power station. A power station within bedrock may be less expensive to construct than a surface power station on loose soil. Avalanche-prone valleys often make a surface station unfeasible as well.