Accurate, quantitative analysis of ecosystems is dependent on the quality of data used to describe the environment. Data quality is a major concern for the Multi-resource Management Planning Research Project, referred to as the Beaver Creek Project, administered by the Rocky Mountain Forest and Range Experiment Station. The goals of the Beaver Creek Project are centered on development and testing of methodologies for management decision making in forested watersheds. In order to meet these goals, large amounts of data from climatic, biologic, hydrologic, geologic and hydraulic measurements must be obtained. The eventual success of the Beaver Creek Project in providing accurate analysis methods is dependent on the reliability and validity of the measured data.