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
Trans Europa Naturgas Pipeline from Zeebrugge and in Mittelbrunn it is connected with the transport system of the MEGAL pipeline system which transports Russian natural gas from the German-Czech border to German regions and France. The length of the pipeline is and it runs in two lines. It has a capacity of 15.5 billion cubic meters per year which the operator intends to increase by 2 billion cubic meters per year. The diameter of pipeline varies from . The pipeline comprises four compressor stations. The pipeline is owned and operated by Trans Europa Naturgas Pipeline GmbH & Co. KG, a joint venture of Open