Old Mill Site on the Saxtons River Matt Kuhn. How has this site changed since the removal of the dam?. Location of mill site. GPS 18 0459115, 4776082 Nad 27. Historic Photograph. Modern Photograph. “Covered Bridge Near Mill” This photo Shows a man standing
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How has this site changed since the removal of the dam?
Location of mill site
GPS 18 0459115, 4776082 Nad 27
“Covered Bridge Near Mill” This photo Shows a man standing
on a muddy road leading to a covered bridge. On the opposite
side of the Saxtons river is a mill. A mill dam can be seen to
the right, as well as, a mill pond spilling over it. This road
used to be the entrance to town and this old wool mill was
a large part of the towns daily life.
This photograph shows the same view in the present. The
woman standing in the photo is standing in approximately the
same spot as the man in the historic photo. The bridge, mill
and dam are all gone. The water level above were the dam
used to be is much lower than before (you can barely make
out the river down below)
Velocity (float method)
10 m / 7.2 s = 1.4 m/s
10.06 m squared
10.06 m squared * 1.4 m/s = 14.08 m cubed/s
n = [10.06 m^2 x (0.84 m)^2/3 x (0.01)^1/2] / 14.08 m^3/s
n = 0.06
River worn rocks mostly metamorphic
mixture of alluvial and bedrock, pool-riffle profile
Located on a river bend. Cut-bank, point-bar system. Outside bank eroded
downward due to increased velocity. Point-bar consists mainly of river worn
pebbles and cobbles.
This is a shot looking from the other side of the river used to be.
the bridge abutment for the covered bridge can be seen in the
center of the photo, built on the bedrock of the river bank.
This is part of the foundation of the old mill. I believe that as I took
the photograph, I was standing in a water channel and the lower
level seen ahead is where a water wheel was located.
Answering the question
Changes to human elements
The most obvious change is the absence of the bridge, mill and dam. The entrance into town is now in a different location further down
the river. All that is left of the bridge is the two supports on either side of the river. The foundation of the mill is mostly intact. The dam
Itself is completely gone. I could find no evidence for it ever existing except for the photograph.
Changes to the river.
The river channel itself is it the same place. It still runs in between the bedrock that the bridge supports were built on. When the mill dam
was removed it changed this area drastically. The elevation of the river above the mill dam is now much lower. When the dam was
removed the river down-cut through the mill dam deposits, eventually returning to it’s original level and consisting of river worn rocks.
Changes to the environment around the site.
When the historic photograph was taken this area was a zone of extreme human impact. The along the river were clear-cut causing
greater sediment load entering the river. The presence of the mill impacted the biota of the river heavily. Today this is the site of
structural ruins In a dense forest, frequented only by pot smoking kids or local drunks.
Channel dimensions were estimated for the river was too high and the
water too cold. All measurements are in meters. The cut-bank can be
seen on the right and the point-bar can be seen on the left. The two
Vertical sections represent the bedrock banks and the bridge supports
that remain today.
Any sort of soil profile was hard to find due to the presence of bedrock.
I was able to get a decent profile upstream where the mill pond would
have been located. The soils in this area were all silts and sands
covered by a layer of river channel deposits which is what you would
expect to find.