One of the few factions advocating peace in Thaliost, House Orien hopes to rebuild the White Arch Bridge and restore the lightning rail that once crossed it. Although the house has spent large quantities of money and political capital here, trying to smooth over the differences between the various factions, it has so far proved incapable of calming the region. Until it does, Orien’s leaders are unwilling to devote the resources and effort at rebuilding a bridge and route that might just be destroyed again.
Source: The Forge of War