Need some additional information. Take a long screw driver and see how far you can push it down into each half of your lawn in several places. . Do a jar test (search this forum for "jar test" for procedure.) Do you mulch mow?
The solution is going to be adding organic matter. This is not a quick fix. In the meantime, you can try shampooing the lawn to start.

Can you post a picture of the lawn?

What kind of grass do you have?

What part of Utah are you in?

When (month) did you seed?

Do you get runoff in the dry areas?

How long do you water when you water? And how often do you water?

I'll explain shampooing the lawn after you answer the questions.