Many options are available for monitoring unstable slopes. The remote location of many unstable slopes has created a need for systems that can be accessed remotely and provide immediate warning in case of a failure. Advances in electronic instrumentation, such as time domain reflectometry (TDR), can be combined with electrolytic (EL) bubble inclinometers, vibrating wire piezometers, and extensometers. Telecommunications make it possible to monitor these slopes economically and provide warning of any movement