WET personnel conducted a sediment and habitat assessment in the Rock Creek TMDL planning area for Montana DEQ. This assessment included the evaluation of stream habitat parameters (including surveys of stream cross-sections, pool and riffle substrate, pool habitat, large woody debris, and riparian vegetation) and the assessment and quantification of streambank erosion. Tasks included field reconnaissance and sample site selection, development of a reach-specific sampling and analysis plan, field sampling, data analysis, and preparation of a summary report that provides statistics of sediment and habitat parameters and streambank erosion conditions. Stream habitat and erosion conditions in this area were primarily influenced by the history of agriculture, logging, and mining within the watershed. This project used methods described by Rosgen in Watershed Assessment of River Stability and Sediment Supply and the most recent DEQ guidance document titled Field Methodology for the Assessment of TMDL Sediment and Habitat Impairments.