Dr Jersey submits an epiphany:
 Quote:
And for that matter, by their definition, aren't my kidneys navigable?
this hypothetical conclusion, followed by the known:
 Quote:
If your waterway shows up as a blue line on a NOAA chart, it is navigable
all supported by the conclusive NOAA document:

...proves once again the high level on intellect collected on one forum can be overwhelming! Lewis and Clark would be proud!