What does the farm grow? Is it less valuable than what the data center will produce? Because you can't eat data. Utah is full of empty spaces that aren't being put to use (except maybe to set land speed records). Why not use those?
As a Coloradoan I'd be for it since it would save a little water from the Colorado River.
Also as a Coloradoan, if I was a climate denier, I'd be for it since the pollution from its natural gas generators would dissipate before it got to me. But in a state that "has the solar potential to provide all of the electricity used in the United States" doesn't it seem a little ridiculous to use natural gas?
That also helps ease the concerns about tax payers left holding the bag. What do you want to be left with, a few extra watts of solar or a bunch of natural gas generators that wouldn't really be useful?
If we're talking about the proposed data center near Brigham City, the area is not part of the Colorado River watershed, so the data center would affect other systems but not the Colorado River.