In this case... The grain is going out to China and any other buyers.
But I understand the point you wish to make.
In the case of the Columbia River dams it is the large amount of electricity that is generated. In the case of the Klamath, not so much. However as part of the Klamath River Compact, the very cheap electricity provided to irrigators in the Klamath Project (a large Bureau of Reclamation project that drained the Lower Klamath Lake for agriculture production). Careful not to oversimplify these issues as they are not simple. Recall, I am deeply conservative, swing green on environmental issues, and my life and way of living intertwined on both sides of this issue.