I've also decided I'm going to extend the Garamantes bonus to allow construction of river buildings (or at least Water Mills). There's only three water dependent buildings, I think. Garden (Fresh Water), Water Mill (River), Hydro Plant (River). Currently they can build Gardens in every city because the tile acts like fresh water. It would be a simply matter to add a line of code to also allow them to build the river buildings anywhere. The whole point of the UA is to make the Garamantes less restricted by terrain when settling cities, and this helps that. I'm not sure if I should also allow the Hydro Plant or just the Water Mill. (The Hydro plant only gives bonuses to river tiles, anyway. It would free them up of not having to settle directly next to the river (eating perhaps a valuable flood plain tile) but they'd still need river in the city radius).