© John H. Beaumont 2011 - 2020
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Photo Tours
Kinzua Bridge State Park, Johnsonburg, PA
HISTORY
Placement
of
the
viaduct's
stone
bases
began
in
1881
while
the
ironwork
and
entire
bridge
were
completed
in
1882.
At
the
time,
the
Kinzua
Viaduct
was
the
highest
railroad
viaduct
in
the
world.
It
was
constructed
as
an
alternative
to
laying
an
additional
eight
miles
of
track
over
rough terrain along the line leading to McKean County's coal, timber and oil lands.
Built of iron, the original viaduct was approximately 301 feet high, 2,053 feet long and weighed 3,105,000 pounds.
By
1900,
it
became
necessary
to
rebuild
the
entire
structure
with
steel
to
accommodate
heavier
trains.
Later
that
year,
about
100
to
150
men,
working
ten-hour
shifts,
completed
the
job
in
105
days.
The
new
steel
viaduct
had
the
same
measurements,
but
now
weighed
6,706,000
pounds.
Freight
traffic
discontinued
in
1959.
In
1963,
Governor
William
Scranton
signed
a
law
that
created
Kinzua
Bridge
State
Park.
The
park
officially
opened
in
1970.
In
1977,
Kinzua
Viaduct
received
national
recognition
when
it
was
placed
on
the
National
Register
of
Historic
Civil
Engineering Landmarks.
Beginning
in
1987,
excursion
trains
traveled
from
Kane,
Pa.,
through
the
Allegheny
National
Forest,
stopping
on
Kinzua
Viaduct
before
returning to its point of origin.
ln
February
2002,
DCNR
engineers
decided
the
structure
needed
a
full-scale
inspection.
In
June,
DCNR
barred
excursion
trains
from
the
bridge.
As
the
inspection
continued,
engineers
found
that
sections
of
steel
were
rusted
through.
In
August,
the
bridge
was
closed
to
all
traffic,
including pedestrians.
Engineers
determined
that
high
winds
could
create
lateral
pressure
on
the
bridge.
The
wind
hitting
the
bridge
could
shift
the
center
of
gravity, increasing the weight on one side. Such an event could send the whole bridge crashing to the bottom of Kinzua Creek Valley.
Beginning
in
February,
2003,
W.
M.
Brode
Co.
of
Newcomerstown,
Ohio,
a
national
leader
in
railroad
bridge
construction
and
repair,
began working to restore Kinzua Viaduct.
On
Monday,
July
21,
2003,
at
approximately
3:15
p.m.,
an
F1
tornado
(wind
speed
73-112
mph)
struck
the
side
of
Kinzua
Viaduct.
Eleven
towers from the center of the bridge were torn from their concrete bases and thrown to the valley floor.
Today,
park
visitors
can
once
again
walk
a
portion
of
the
Kinzua
Bridge.
Built
on
six
restored,
original
towers,
a
pedestrian
walkway
(skywalk)
leads
to
a
225-foot
high
observation
deck
that
gives
a
towering
view
of
the
Kinzua
Creek
Valley.
A
partial
glass
floor
in
the
deck
reveals
a
breathtaking
glimpse
into
the
steel
structure
of
the
bridge.
The
eleven
twisted
and
scattered
bridge
towers
blown
over
by
the
tornado
remain
at
the
bottom
of
the
valley
for
visitors
to
view
from
the
deck
railings.
Several
benches
line
the
paved
walkway
to
the
skywalk.
A
grand
opening was held on September 15, 2011.