We're Movin' on Up...

After returning to Casper with Mandilissimar, the party can arrange to secure proper healing for him, if necessary, or part amicably if they have healed him already themselves. In any event, he can find what he needs to recover fully once in town, and the party can continue on their quest.
The next stage of the journey is a momentous one, a literal watershed in terms of development, since they will finish a short 20 mile journey upriver to Deadfall. Deadfall is where the Upper Aron Valley drops into the Lower Valley. There is a 200 foot cliff running across the width of the valley from east to west, with the river plunging down over the side in dramatic fashion. For the last five miles as you approach, the roar is deafening. There is a large pool of water at the base of the cliff, with a large town on its northern edge. All river trade ceases here, as the only route to the Upper Valley is by land.
The town stretches out on either side of the Basin, with roads leading out to farms on either side of the river. There is an old road leading out of Churning that leads east toward the mountains, and a shallower cliff face. The road swings miles out of the way, and tracks a precarious journey back and forth across the face of a steep 120 foot exposed rock face. West of the Basin, the cliff rises to a maximum of 470 feet, with the eastern edge of the Iron Teeth towering over the plains of the valley.
About 5 miles east of the Basin, clear of the spray from the cascading river, and where a point of the cliff juts northward to shield the land beyond from the worst of the noise, there is another bustling "port" of sorts. Driven by the needs of the miners above for food and supplies, and the wants of the lands below and downriver for gold and precious minerals, a large lift system has been constructed to get goods up and down the cliff in volume. Originally constructed as a series of caves cut into the rock, working their way upward, the factory settlement of Clifton has expanded its endeavors by creating three giant lift systems. These can transport whole warehouses at a time up and down the cliff. The lifts are loaded in an eight hour shift, raised or lowered in about the same, then unloaded at the other end. They have one moving up and one moving down in synchronization, with the third being loaded/unloaded while the others make the trip up or down.
Several smaller lifts allow quicker movement of smaller loads in emergencies or with special cargo. The cave system is still open as well for those who can't afford the fees for the lifts. It is kept operational mostly as a conduit for maintenance, but small "local" travel is permitted as well.