The geotechnical aspects of final cover system slope stability follow the same principals used for other geotechnical stability problems. What is unique and important to recognize relative to final cover systems is their sensitivity to relatively small changes in loading, slope angle, pore pressures or shear strengths that make them more susceptible to sliding failures. This extra sensitivity shows up in the failure rates observed for bottom liner failures versus final cover failures in the lining containment industry. While there may be only less than a dozen publicized bottom liner failures in the United States over the past 20 years, there have been dozens of veneer cover system failures that have occurred. When analyzing a final coverl system for slope stability, design practitioners might consider an evaluation of the project reliability in addition to a factor-of-safety approach.