I'm trying to keep deer out of my back yard. I'll probably use a
combination of tall fences and low fences depending on the area. But
the real dilemma is that I have a small stream (about 10' wide and
usually only 12-18" deep) running through the back of my property. Due
to erosion through the years, it goes in a very short distance a 1 foot
bank to a 5 foot bank. On the far side is a wooded area.I would like to
include the area on the house side of the stream in the deer free area.

Question is: What could extend over the stream (and down) that would
keep the deer from using it as a passageway? Whatever it is can't be
obtrusive and shouldn't catch the debris floating down the stream.

Ideas?

Thanks.