An overall summary model was developed for the SRC-1 coal liquefaction demonstration plant using the ASPEN PLUS process simulator. This model includes all major process areas of the plant represented on an overall yield/separation basis. Specifically, the model consists of 34 individual process unit submodels, an estimation submodel for selected plant utilities, and a coal dissolver area yield predictor submodel. The model is intended to provide a preliminary converged solution for interarea terminal stream material balances.