The River Adivian is a crucial regional resource for trade and transportation in south-central Cheliax, though rapids and signifigant waterfalls marr the route and make the river currently impassable to vessels with a deep draft. Despite these hazards, the river remains one of the primary means of transportation between the city of Westcrown near its mouth on the Inner Sea and the capital at Egorian on the banks of Lake Sorrow.
Of the many hazards to navigation on the Adivian, the most notable are the Three Tumble Pools, Chalraka's Tears, and Rikkan's Falls. The latter were named after an Andoren traveller who first drew the falls in 1896 AR and published his journals almost 40 years later as Travels on the Far Frontier. Over the centuries, several attempts have been made to ease travel along the Adivian. The impressive Stavian Arches were constructed between 3850 and 4100 AR and allowed even seagoing vessels to traverse the falls and gain access to Lake Sorrow and Egorian, however the third and largest of the arches was destroyed in 4660 AR leaving only medium sized ships and barges to ply the river trade.
The Adivian Bridge crosses the river a mile west-northwest of Westcrown and is a signifcant garrison point for the Hellknight Order of the Rack. Gatehouses placed at either end of the bridge defend this important crossing point.