Arkansas soil types may present many challenges for the Arkansas pool builder.  In different parts of the state, soil conditions may be very rocky, and in other areas, red clay, shale, and even sandy loam may be the type of soil one may encounter in their yard.  How a pool builder chooses to deal with this is sometimes unknown until excavation is underway or complete.  If for instance, your yard has expansive clay, the pool builder may elect to address this with an increased grid measurement on the steel curtain, or possibly even move to a change of grade in the thickness of the steel.  These changes, "engineer" the strength of the concrete (gunite) so that any probability of the pool shell developing a structual defect are mitigated. 

You might want to discuss this with your pool builder and at best pre-determine your soil condition if possible.  A  report might need to be accomplished on your land if deemed necessary by your pool builder in Arkansas.  A question one might ask is, "Will we need to conduct atest on our yard to determine our soil type and would any added costs be necessary".