How does one make use of the the salt you can find in Utah?
When I was there I remember seeing those strange salt puddles and ponds all over the place. I say strange because I did not see water in them just thick salt that was so thick it car tires and foot prints did not sink.
We had friends who were missionaries in Ethiopia where they also have salt deposits which are similar to what you are describing. There, this salt is collected and carted to the towns where it is sold for household use.
You should be able to dissolve the salt in clean water, filter it, and then evaporate the water off to be left with pure usable salt. The point is that salt will kill anything harmful anyway, so there is no problem with using it this way.
Ray