Timeline for EXNI appI am going to attempt the answer to the timeline involved in the EXNI application from the State of S Dakota, (DENR). It is pretty clearly spelled out on their website. The normal amount of time for completion and approval time is one to two months. The only thing that changes that is if the permit involves National Forest land. Standby mine is on private property. Thus, having submitted the application on August 17th. I would make an educated guess and say by the first part, or shortly thereafter, of October.