BSTEM divides the bank into two sections, the Bank and the Toe (see figures in Defining Cross Section Configuration) sections. Conceptually, the toe is material composed of blocks of failed material or engineered toe protection. Therefore, failure planes are only computed through the bank surface above the Top of Toe. The Top of Toe often corresponds to a break in slope or material type but it does not have to. In future versions of BSTEM, users will be able to select a separate material type for the toe but in the first alpha version of BSTEM, the software adopts the material type of the bank or layer associated with the toe. This parameter can be automatically set to the HEC-RAS left bank station for every cross section that has Left Bank Material defined. From the HEC-RAS Sediment Data Editor (bottom figure in link), click Set Toe Station to Bank Stations and click the Set Toe Stations to Movable Bed Stations (movable bed limits). Setting movable bed limits and toe stations at the same node is recommended.