Project goals of the 2011 TNC Centennial Valley Aquatic Survey and Assessment were to: 1) determine if Western Pearlshell mussels or other unique/SOC invertebrate taxa are present or may have been previously present in selected streams of the basin and 2) collect baseline data and assess aquatic community integrity within stream restoration reaches based on macroinvertebrate communities, in-stream habitat characteristics and basic water chemistry data. A previous macroinvertebrate collection on Long Creek was performed in 2009 (Anderson, unpublished data), but due to inadequate and unrepeatable methods for macroinvertebrate processing (timed hand-picking of live organisms with unaided eye at the site), meaningful comparisons cannot be made to this data.