This report describes the development of a microcomputer-based prototype expert system (ES), RETAININGEARTH, for the selection and design of earth retaining structures. The ES RETAININGEARTH is an interactive menu-driven system and consists of two modules - the selection module, SELECTWALL, and the design module. SELECTWALL is developed using the rule-based M.1 knowledge engineering shell and it makes a choice of the most appropriate retaining structure from a list of ten ...