Construction of the Trans-Alaska Pipeline System with the Denali Fault, a major cause of earthquakes, and with large amounts of permafrost. In 1969, the unincorporated Trans-Alaska Pipeline System group drilled a series of core samples north of the Brooks Range that demonstrated how ubiquitous the permafrost was along the route. This forced the design of an elevated pipeline, which was tested in a loop built near Barrow. This elevation required the pipeline to be insulated, since extreme cold temperatures caused the metal to become brittle, even when hot oil was being pumped through the pipeline. After ecological objections forced subterranean pipeline crossings (in order to allow
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