Academy - There have been some suggestions that the way that the elite are trained could be improved, to the benefit of all who appreciate learning. (3-5? action commitment, -2 Culture and Mysticism per action, 0/1 Econ commitment)
Great Dam - The river can run wild and dangerous when the rains come strong, but could it not be controlled by the same principles by which the water on the hills is channelled and contained, merely on a larger scale? (4-6? action commitment, -2 Econ per action)
Great Library - The libraries thus far are fine, but with many of them and one on a port location, the possibility of an even larger library where everything might be stored presents itself (5-7? action commitment, -3 Mysticism and Culture per action, 0/2 Econ commitment)
Triangle Canal - There is land in the north where the soil is mostly clay and can be cut efficiently, allowing for a great canal to be cut between the two forks of the Black River, from which smaller irrigation canals can be built to water the land of the Stallions, massively increasing the available well watered land (8-11? action commitment, -3 Econ and -1 Tech per action)