ARRC rail alignment improvements birchwood, Alaska Railroad design - Construction in marginally frozen relic ice and soil

Alaska Railroad Corporation (ARRC) is actively realigning several portions of track in-between Anchorage and the Matanuska Valley. This project focused on a curve straightening at MP 133 near Birchwood, Alaska. The design was complicated by anomalous subsurface conditions consisting of relic massive ice, frozen soils and normally consolidated clays that...