Again, you have not been doing your part to become informed on the issue. The Columbia Basin Project has paid for its self about 10 times. Every few years it pays for its self again. Your question sounds like a question from a mindless pundit. Once again, do not be suckered in by the pundits.
All worldly things have limits.
As stated earlier agriculture is in a constant state of dynamic improvement. That cannot be said for salmon recovery on the Columbia. You are confusing the Columbia Basin Irrigation Project with the Yakima Valley. Understandable because of the blind press coverage. Columbia basin irrigation agriculture creates many jobs in this region.