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Northwest Forest Plan The First 20 Years (1994-2013): Watershed Condition Status and Trend
Institute for Sustainable Solutions Publications and Presentations
  • Stephanie A. Miller, U.S. Department of the Interior
  • Sean N Gordon, Portland State University
  • Peter Eldred
  • Ronald M. Beloin
  • Steve Wilcox
  • Mark Raggon, U.S. Department of Agriculture, Forest Service, Pacific Northwest Region
  • Heidi Andersen, U.S. Department of Agriculture, Forest Service, Pacific Northwest Region
  • Ariel Muldoon, Oregon State University
Document Type
Technical Report
Publication Date
  • Watersheds -- Research -- United States
We used two data sets to evaluate stream and upslope/riparian condition for sixth-field watersheds in each aquatic province within the Northwest Forest Plan (NWFP) area. The stream evaluation was based on stream sampling data collected from 2002 to the 2013 (214 watersheds) as part of an eight year repeating (rotating) sample design. We are currently halfway through our second rotation of stream sampling, and have repeated 110 watersheds since the second rotation began in 2009. The analysis presented in this report uses roughly half the number of watersheds as was originally intended by the sample design since re-visitation will not be completed until 2017. In the meantime, we compare the first rotation of visits (2002-2009) to the first four years of the second rotation (2010-2013) giving us a general idea of current patterns. To evaluate stream condition we used a reference condition nearest neighbor statistical approach to calculate the stream physical habitat scores based on substrate, wood, and pool metrics for each watershed. Macroinvertebrates and water temperature were analyzed separately from physical habitat and provide additional assessment of overall watershed condition. Scores for both stream and upslope/riparian conditions were normalized to fall between 0 (poor) and 100 (good).

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Persistent Identifier
Citation Information
Raggon, H. A., & Muldoon, A. Northwest Forest Plan–The First 20Years (1994-2013).