However, the previously unexposed Roca Shale, which had demonstrated remarkable durability during the release, was expected to undergo rapid severe deterioration if left open to the effects of the Kansas climate. So, it was determined that minimal repair was to be made to the upper length of the chute. Weaker and fractured limestone shelves were grouted and then buttressed with shotcrete, and then the area was covered with terraced soil and returned to grass. Soil pH was adjusted to further protect the reburied rock. The rock formations of the lower portion were left exposed.