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A recent high priority need item of the USDA Natural Resources Conservation Service (NRCS) was development by the USDA - Agricultural Research Service (ARS) of a combined water and wind process erosion model. This new model would ultimately replace individual erosion prediction software tools (e.g. RUSLE, WEPS, WEPP, etc.), and would provide consistent results in estimating soil moisture, runoff, plant biomass development, and residue cover, decomposition and burial by tillage. The new tool would take the best science available from existing models, and when necessary or appropriate new scientific relationships would be utilized. As a possible platform for development of the combined erosion model, the Object Modeling System (OMS) currently being developed by USDA-ARS GPSRU and Colorado State University in Fort Collins, CO was utilized. This presentation describes the process of creating a standalone hillslope erosion program (originally based upon the Water Erosion Prediction Project (WEPP) model code), testing of that program, then incorporation of the stand-alone erosion program within the OMS system. Evaluation of the new modular component, and work on creation of additional components and a complete functional erosion model within OMS will also be discussed.