[4] Fish would wait at Salmon Hole until flow enabled them to swim into the higher-gradient spawning gravels upstream of that point.

[6] Tree-cutting began after the autumn harvest; logs and lumber were moved on sleds while snow covered the ground from December through March.

[6] A major flood in October 1869, locally known as the "pumpkin freshet", destroyed every bridge over the river and most of the early mills.

[9] Pulpwood cutting kept the railroad profitable through World War I, but sustained forest yield was insufficient to pay operating costs.

[10] A week of rain on accumulated winter snow washed out the Redington Pond dam and produced the largest recorded river flow of 38,000 cu ft/s (1,100 m3/s) on 18–19 March 1936.