• Sediment, temperature, pool habitat, escape and ambush cover, and substrate embeddedness in the estuary are thought to be outside of supportive levels for salmonids in the estuary
• Predation upon depressed fish populations by birds and mammals in the estuary;
• Excessive extraction of water during low flow periods;
• Artificial fish passage barriers exist at some road crossings of streams;
• Abandoned roads, new road construction, and road maintenance issues related to landsliding and sediment input to streams;
• High water temperatures;
• Pollutant spills, such as some recent bulk diesel spills into tributaries;
• Herbicides used on industrial timberlands;
• Location and conduct of timber harvest operations;
• Sub-division development and construction;
• Low stream habitat diversity and complexity;
• Low stream shade canopy cover;
• Large woody debris recruitment to streams;
• Absence of salmonid information, low fish densities, or absences of fish;
• Access for agency personnel to private land for field studies.