Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1903-11-14

construction OF concrete ,.
pulit to withstand strain 'nueture
or drunken foreman can MIA, eless
win several thousand dollars n n"voe
minutes, me concrete has To no NV lew
W nicely, with just the same nrn n'. rA.
aniount OF cement and ingredonta asa
III M. W nuke W the former denos,ta
otherwise there will be trouhle Pos''s
DIFFICULTIES ENCOUNTERED
Each pier OF this yiaduct ros..
lix2S foot concrete base, whicb s on a
down to bedrock itself tbus rA.sshus
the foundation absolutely secure IAN" irlg
Whole work would have been ortd,s
ana, undoubtedly, entrance into pi,'nu
sue erected long before this tImo w.,
not greater difficulties been enro,,n,d,
III Trying TO reach bedrock for he ba Icy
of the eighth pier. " '"e pnse
THE CONSTRUCTION
In constructing the foundations o..
the piers sheet pling was fra drt,o or
and then the sand and gravel evca,.a,"
cd by means of suction dredge n,,,,,,
Bedrock was encountered nj fron, ~
TO bO Feet below water level An It,,
are founded on the granite bed rooi,
~ the springing line the piers are o..
"a rect Above the springing limo ~
the arch the piers are cored ont In tha
center 10 save material and weight
Inc outer spandrel walls are three foot
tnick anu rise 21s feet above the crown
OF tne arch Above this height there
is l0-ln coping and a three foot MIRA.
pet wall. The main arches oro 4,
inches thick at the crown. There ,n 20
two inner spandrel walls connected Nv,
cross wall, and upon this is laid
10 inch floor to receive the COVERING ~
3la feet of ballast
CONCRETE MIXERS.
A battery OF three Ransonip concreto
mixers was used In mixing the con.
crete. The mixing plant was located M
the west end of the viaduct and the
mixed concrete transported i'm half
yard cars out oyer the viaduct This
work was in the hands of the T.. b. q
A, H. stone company Of Oakland. Cal.
CONTRACTORS DESPAIR.
This whole work would have been
finished couple Of months ago but for
the difficulties encountered I'm trying 10
r each bed rock for the base Of the
eighth pier. II seems that at the posi-
ton of the first pier bedrock wns en-
countered at IL feet below the surface
As work progressed towards the east
for each successive pier, bedrock was
found at n greater depth until No.
had to be sunk 80 feet for firm foun-
dation on one occasion 1t was thought
that bottom had been reached and work
was commenced, but 1t proved to be
huge boulder which gave way and
sank as soon as operations were fairly
underway. Ultimately at the depth OF
35 feet the contractors had to admit
that they were beaten. Water and grav-
el settled back in the hole as fast as Il
could be taken out.
FINISHED THIS MONTH.
The work OF completing the viaduct
was then undertaken by the Empire
Construction company. As there was
no way of getting the water and gravel
out satisfactorily the workers deter
mined to grout It, Groutlng consists
of utilizing enough pumps to keep all
surplus water out of the way and fore
ing with other pumps sufficient cement
down into the gravel to change II into
a substantial concrete. six. eight and
ten inch Worthlngton pumps are now
placed and the work Is progressing with
the result that II will be ready for traf-
fc this month. When finished the road
way over the bridge will be ballasted
with the same decomposed granite that
Is being used over the entire west end
of the line, making II impossible for
one to determine, unless looking from
the window of the car whether he Is
on the bridge or on terra iirma.
II is anticipated that trains will be
running into Riverside over the con-
crete viaduct by the first of the year.