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We stopped at a park on the shore of Lake Pepin (also the
Mississippi River, but up here it is a series of dammed lakes) and
learned that there used to be 50 button factories along the
Mississippi where the majority of the shell buttons came from for
the garment industry in this country. Now no one uses shell buttons
anymore and some of the mussels that they had used are endangered.
We were not tempted to enter the river. 
A little farther down the river, we stopped along the road to take a
picture of this tug pushing some barges.

There was a dam looming ahead, so we decided that it would be fun to
watch it go through the lock.



We had camped in Afton (at the yellow A) and we stopped at Lake Pepin
(at the yellow B).

Here we are at Dam#5 and that night we camped at Wildcat Landing (at
the yellow C). But back to the dams...

Here are the dams down to St. Louis. The scale is feet to miles so
it looks much steeper to fit the whole section of the river into the
graphic. Of course the real dam #1 was that beaver dam, but that
isn't shown here.

The pilot of the tug had no trouble pushing his load to the lock. At
this point we see that it's 9 barges.

The guy walking beside the barges has no trouble keeping up the
pace. The barges are empty with their covers stacked up.


Meanwhile, a train is also hauling a load of freight along the
river.

The nine barges just barely fit into the lock, so the pusher tug
waits until the barges are on the other side of the lower gate.
There are no pumps used—just the flow of the river and the use of
valves.


Finally the pusher comes through. It's a long process and when you
think of all those dams on the river it's not an easy trip up or
down the river.
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