Yes indeed I did read up on how the USA help built canals and dams during the 50s and on through the 70s just prior to the Soviet invasion Post Taliban the US and British soldiers helped restart, but intra-tribal conflicts, government corruption, water mismanagement, and a flourishing opium trade all contributed to uneven sharing or illusion of prosperity hence resentment from the Pashtun farmers.
Well the big problem with the canals is that it destroyed a system of water rights that had been developing in place for centuries and replaced them with a few centralized points of control. If ever there was a recipe for civil war that was it.