Click here to view this
graph for another stream
(opens a new window)
Remember
that the graph represents AVERAGE slope. Some sections of the
stream or road may be steeper, while other sections are less
steep.
Flat as Farmland? Lake Avenue in downtown Duluth, with a slope
of 11.9% or 6.8°, is a pretty steep street - REALLY!
The lines on the graph above look pretty flat, but consider
the following:
The maximum street slope allowed by the MN
Department of Transportation for new road construction is 12%
or 6.8° (and only 3% or 1.7° on freeways)
Sand dunes (that can be very difficult to
climb!) have maximum slopes of 68% or 34°.