Closure to 'Shear Strength in Preexisting Landslides' by Timothy D. Stark and Manzoor Hussain.

The article focuses on the response given by writers Timothy D. Stark and Manzoor Hussain regarding a discussion on shear strength in preexisting landslides. They say that the shale sample from Duck Creek, which was provided by G. Mesri of the University of Illinois at Urbana-Champaign (UIUC), does not represent a failure surface. They agree that the best estimation of residual shear strength must be used in future stability assessment of landslides whether they are creeping, stable, or moving.