The Logan Republican. [volume] (Logan, Utah) 1902-1924, 1917-01-02

he interested in reading OF the plac-
ing in service across the Missouri
at Omaha OF the new Union Pacific
bridge. Older residents OF the state
need no reminder OF the place Oma-
ha held in their interest in early
DAYS. The early day Utahn was al
most as much at home on the streets
/ of the Nebraska city as he was on
East Temple street, or Main street
as II is more popularity known. The
old bridge across the lazy stream
was a familiar sight to them.
Last Wednesday - the operation
recurring only about an hour,
noteworthy engineering accomplish
ment-the newest bridge spanning
the river was moved into place and
the old bridge moved out Of the way.
While the new bridge was being as
sembled. the old structure remained
in service. At its side, however,
there was built remarkable piece
Of false work. The new bridge it.
self was built on false work. Be-
tween the two were the permanent
piers for the new bridge, the same
that were originally built under the
old bridge. When the time came.
section by section the old bridge
was moved off the piers onto the
false work at its side and in its
place sections of the new bridge
were moved. The old bridge will
remain on the false work until II is
taken to pieces and moved away.
The first single track bridge over
the Missouri river was completed in
1872, at an approximate cost Of
s1.750.000. This bridge consisted
Of IL spans Of trusses known as the
Pot type. each $50 feet in length,
the approach on the east side being
solid embankment, and on the west
side a cottonwood trestle, which
trestle was later filed.
In 1877. the two easterly spans
were wrecked by a cyclone, and new.
er rebuilt, being replaced with tim.
Der trestle. The sub-structure con.
sisted Of II iron cylinder piers, and
one stone pier. at the extreme ives,
end. all of which were founded OF
bed rock. Each iron pier consisted
OF two cylinders Sa feet in diamet
er. placed 1914 feet centers.
The bridge was commenced IL
| 1885, and completed for operation
late in the fall OF 1887. 1t was
double track structure, consisting o
: four through Whipple trusses. eacl
246 feet long, with three deck span
/ at each end. The total length wa
about 1850 feet. At the time tn
| bridge was erected, an extension wa
arranged for on either side of tn
main spans for one roadway, an
one sidewalk.
The work OF reconstructing an
replacing the old bridge was con
menced in May, 1916, and II wa
placed in service Immediately afte
being rolled into position Wedne.
day afternoon. December 20. TIL
estimated cost is $1,OO0.OOO. TIL
bridge consists of four through Prat
pin curved top chord spans 246 fe,
long: one through Pratt rivete
span 100 feet long, and two thro,
Oh Pratt riveted spans 100 feet Ions
four deck plat Orders 81 feet Ion
and two deck plate Orders so fe,
long, for two tracks. The tot;
length Of bridge is 1922 feet, whic
does not include approaches. I'll
, total weight Of the new bridge
J about eleven and a quarter millio
} pounds. as against Ave and a ba
\ million pounds in the old bridge r.
, placed. The height OF track abo,
normal water in the Missouri riv.
, Is about 20 feet.
} The work undertaken consisted
} replacing the entire super-structu,
! with new and heavier steel. II
!, piers supporting the four main riy,
: spans remaining in place. The a
, proach spans are supported with ne
} concrete sub-structure.
} The four river spans were erec
} ed on temporary pile pier extension
Y to the south of the masonry pier
= and similar temporary pile pier e
, tentions were arranged on the no
} IN OF the masonry piers. The o
} spans which were replaced were raj
} ed and mounted on rollers, al
\ rolled to the north on the tempo
y airy pile extensions, and the ne
> spans then raised on temporal
piers on the gouth and rnIIod In,