The slope of permafrost where an 810-foot section of pipeline is secured has started to shift as it thaws, causing several of the braces holding up the pipeline to tilt and bend, according to an analysis by the Alaska Department of Natural Resources.

A permafrost scientist in the N.W.T. is leading an experiment that compacts snow near the Inuvik-Tuktoyaktuk Highway to see if that will slow down permafrost thaw and protect buildings and roads built atop it.

The issue of erosion is not new to Noatak cemetery. The old cemetery was located near the Noatak's airstrip, but in 1993, the spring breakup caused 30 feet of erosion adjacent to the cemetery. Flooding during the fall of 1994 further threatened the site, so residents relocated 200 graves to the north side of town.