Their main problem with the yeti is that they failed to fully take into account the karst geography under the yeti foundation. They have investigated various remediation methods (such as driving additional pilings) but unfortunately due to the heavy concrete foundation already in place, ground penetrating radar and other such flaw identification procedures are very limited. This is a safety issue, therefore, they don't have the ability to do anything within their dreams. From their perspective, they're just thankful they didn't have to shut the entire ride down.