Since the November earthquake of 2018 the ARRC will conduct a mitagation on the railline. See the links below for details for the Nov. 2019-Jan 2020 construction period by Granite.

https://www.alaskarailroad.com/sites/default/files/Communications/MP_103_EarthquakeDamage_Improvement_Plans.pdf

https://www.alaskarailroad.com/sites/default/files/Communications/2019_PotterHill_MP-103_EarthquakeDamageRepairs.pdf