Back many, many years ago, when I lived in
Pennsylvania, some winters were so cold that
the rivers froze over with two to three feet of ice. In the Spring when the temperatures had
warmed up, this thick ice started to break up. It did so not just because of the warming
weather but also because of all the extra runoff it was getting from the
melting snows upstream. Sometimes it
would break up and go out a little at a time, the down-river end first and then
work up river. That was the neat and
easy way. Sometimes it all seemed to
crack up in huge chunks and all the chunks wanted to get down stream at the
same time. Anywhere the river made a
turn the ice would start to build up on the outside of the curve and if enough
piled up, it would cause an ice jam. This
would work as an efficient dam and back up the water and the ice. Presto!!
You got an ice jam. As most of
you know, water is not compressible (under normal circumstances) and the
hydraulic force of the water shoving the ice would pick up bridges and move or
crush any houses or structures too close to the river bank.
And just in case you really want to get bored, here is the poem:
Ice Jam on Allegheny
Here is plenty of ice to cool you down.
Now don’t you think that it is?
If and when it all melts someone could drown.
If it melts fast in a whiz.
So just chip off small chunks to keep you cool.
And close your eyes and just dream
Of ice and snow in the season of Yule
Better than leaving off steam.
Cover up with blankets and close your eyes
And take a comfy, warm nap.
Dream of the ice and see how the heat flies.
Like on a mountain ice cap.
I am sure that I have bored you or made you laugh at my silly attempt to write a poem, but remember, I have to write a different poem five times a week on what ever subject is depicted on the cards that either my wife or I make. So, you all have a great day now, you hear?