Construction of the Trans-Alaska Pipeline System for a fifth, should it become necessary. Holding tanks were planned that had a capacity equal to that of the pipeline, allowing the whole pipeline to be emptied if required. As required by the Pipeline Authorization Act, a ballast-water filtration system had to be designed as well. This system removes oil from tankers' ballast water so it is not released into Prince William Sound—something fishermen feared when the pipeline was proposed. Shortly after the permit was signed, convoys of equipment on snow tractors began heading north, using hardened snow roads and an ice bridge over the Yukon River to reach
NOGAT Pipeline System 5% by Total S.A. and 1.8% by Venture Production. The pipeline was originally operated by Nederlandse Aardolie Maatschappij BV (NAM), but after acquiring the NAM's stake in the pipeline, GDF Suez took over the operator's function. NOGAT Pipeline System NOGAT ("Northern Offshore Gas Transport") is a natural gas pipeline system which connects Dutch continental shelf with an onshore gas plant and terminal at Den Helder, the Netherlands. The system has been operational since 1992. The Danish continental shelf pipeline system is connected to the NOGAT through the Tyra West – F3 pipeline and the German continental shelf pipeline system is