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	What Factors Are Contributing to Tillamook's Environmental Issues? No single factor is responsible for the environmental problems in the Tillamook Bay watershed today. Rather, Tillamook's current water quality, habitat, flooding, and sedimentation challenges are the result of the interplay of many factors over time and space throughout the watershed. The image below shows some of Tillamook's contributing factors. Click on the symbols in the image to view information on some of Tillamook's contributing factors in the text box below. Image and Data Credits Sources Coulton, Kevin G., Philip B. Williams, and Patricia A. Brenner. 1996. "An Environmental History of the Tillamook Bay Estuary and Watershed." Tillamook Bay National Estuary Project Technical Report. Number 09-96. Harvey, G.W. 1989. "Technical Review of Sediment Criteria, for Consideration for Inclusion in Idaho Water Quality Standards." Idaho Dept. of Health and Welfare, Water Quality Bureau, Boise, ID. Miller, Jessica, and Ralph Garono. 1995. "Impacts of Erosion and Sedimentation in Tillamook Bay and Watershed." Tillamook Bay National Estuary Project Technical Report. Number 02-95. TBNEP (Tillamook Bay National Estuary Project). 2000. "Restoring the Balance: A Summary of the Tillamook Bay Comprehensive Conservation and Management Plan." Tillamook Bay National Estuary Program Technical Report. Number 01-00. TBNEP (Tillamook Bay National Estuary Project). 1999. Tillamook Bay Comprehensive Conservation and Management Plan: Restoring the Balance. Garibaldi, Oregon. TBNEP (Tillamook Bay National Estuary Project). 1998. Tillamook Bay Environmental Characterization: A Scientific and Technical Summary. Garibaldi, Oregon. What's Next? See why mapping the watershed helps us understand these issues.