Project goals of the MTNHP Aquatic Surveys of the BLM Clarks Fork Yellowstone 2007 aquatic sites: 1) to sample and assess aquatic community integrity based on macroinvertebrate, fish and habitat sampling from a priori chosen aquatic sites in the area of interest (Table 1), 2) to identify and interpret key community indicators found at the sites using standardized protocols and biotic thresholds, and compare these against reference condition standards at the watershed-level and local-reach scale