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
NEL pipeline asked exemption from the network access and transit fees regulation; however, this request was denied. The pipeline was built by OPAL NEL TRANSPORT GmbH. It is operated by NEL Gastransport GmbH, indirectly owned by WIGA Transport Beteiligungs-GmbH & Co. KG, a joint venture of Wintershall and Gazprom. NEL pipeline The NEL (Nordeuropäische Erdgasleitung (English: Northern European natural gas pipeline), formerly known as Norddeutsche Erdgasleitung, is a long natural gas pipeline in Germany. The pipeline runs from Lubmin near Greifswald through Sülstorf and Achim to Rehden. It connects the Nord Stream pipeline with the Rehden-Hamburg and MIDAL pipelines. The pipeline started