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![Figure 6-4.–Ground photograph of the Trans-Alaska Pipeline and parallel access road constructed on ice-rich permafrost. The pipeline is constructed on elevated thermopiles to dissipate heat and prevent thawing of permafrost.](images/Cryosphere_Notes/large/pp1386a_fig6-4.jpg)
Figure 6–4. Ground photograph of the Trans-Alaska Pipeline and parallel access road constructed on ice-rich permafrost. The pipeline is constructed on elevated thermopiles to dissipate heat and prevent thawing of permafrost. |