We are now deep inside Kingman Canyon. Seligman Sub double track here splits into two separated main lines. You're looking east, first at the north track with the low concrete trestle, and then the south track with the girder bridge and train. The BNSF may not call these the north and south tracks, that's a Canadian term. Since Canadian transcontinental main lines are designated east and west no matter which physical direction they may take grade separations are labeled north or south. For clarity I'll follow that practice in this article.