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Caption: The chart above shows road densities in miles per square mile within the Upper Trinity River Planning Watershed as of 2001. Road densities in many sub-watersheds exceed the properly functioning condition according to the National Marine Fisheries Service (1996), which is less than 3 miles per square mile and the salmonid survival reference determined by Cederholm et al. (1981) of 1.6 miles per square mile. Data were provided by Graham Matthews and Associates (2001). Click on Info Links for more background information.
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