There were many large piles visible in Bobby Joe's recent pics from 4/23 that are reposted in the photo gallery here, all behind the mill in the area where they have been disposing of the tailings from the mill. A large increase from any pics I remember. In the same pic you can see some piles closer to the mill that appear to be the ones in mem's pic that you asked about. In the newest pic, the white and lighter colored piles look like mill tailings- according to PQ at the SHM, the ore is reduced to the size of "smoke particles". The other darker dirt with larger clumps is probably dirt that was moved or will be moved to cover the tailings for replanting, or was maybe just moved around during the recent grading.