Evening times-Republican. [volume] (Marshalltown, Iowa) 1890-1923, 1909-10-20


and unless unforeseen difficulties arrive,
it is thought that the new concrete
dam. and its retaining walls and the
other improvements in the rivers water
way near the pumping station and
4 Center street bridge, will be finished in
about two months Those who nave
not visited the scene where these i'm
provenemts are in progress do not ap-
preciate the magnitude of the work,
which for purely reinforced concrete
construction eclipses anything of its
kind ever erected in this part of the
state.
Il Day by day the immense dam and
the long walls which will flank 1t on
both sides of the river are growing.
The concrete work itself is little more
than one-third finished.
Most of Dam Done.
A large section in fact the greater
part Of the dam proper is finished.
About 100 feet of it is completed and
the wooden frames into which the con-
crete was poured. which shaped it, will
be torn down in a short time. A large
part of the retaining wall on the north
side of the river is finished but a part
of the ditch, which will contain the
upstream end OF the wall, has not been
excavated as yet When the work on
the north side of the river is completed
the mixing plant and machinery will be
moved TO the pumping station side of
the river.
Dam and Walls Like Huge "H".
When the dam and walls are finished
they viii resemble somewhat a huge
letter "II, with the dam representing
the horizontal cross bar of the letter,
and the retaining walls the vertical
sides.
| The upstream end of the retaining
wall on the north side starts above and
! on the upstream side of the north ap-
proach 10 the old bridge. This part of
the retaining wall passes under the
north approach TO the bridge, and sep
arates from the main land the pier and
the point of land under the approach
The end of the retaining wall is bent
outward and upstream under the bridge
and by so doing the channel of the river
at that point will be about one third
larger than it has been. This retaining
wall is about $50 yards in length. ex-
tending TO far below the dam. At the
bridge it has a height OF over twenty
feet, sloping downward as it passes be-
low the dam.
East Side Work Not Begun.
The forms for the dam have beer
built across the river toward the pump
ing station TO a point no farther thar
the bulkhead. which runs parallel witt
the rivers current, and is TO be erected
al an anchor for that end of the dam
When the dam is finished as far as tn
bulkhead, the Work on the pumping
station side will commence. Befor
the retaining wall is 10 be built on tn
pumping station side great deal 0
eycavating will have TO be done, il
order 70 get its foundation on soli
rock
The retaining wall on the pumpin
station side viii begin near the corne
of The Marshall Ice Company's hous.
which stands nearest the bridge LilS
the wall on the north side il will b
DETECTED outward 70 make a wide
channel for the water. AS it will ru
down stream. il VIII stand Just a littl
nearer 70 the center of the river tina
tine farthest wall Of the mill, and wi
extend past the pumping station
short distance.
Vast Amount Of Material Required.
Some IDEA Of the vast amount Of me-
-eyial required may pc CLEANED fro
ire fact nat Il VIII AXE from twent,
I've % thirty car loads Of cement,
say nothing II many times that amour
u gravel. and in addition several c;
= loads of lumber Used FOR the forms al
r me Golfer dams.
The retaining xall= get on a found
ION eignt feet broad. The wall Lessee
n thickness as il nears itg Top, whe
. il has 4 width Of .wo feet.
The food gate. 2ox7l2 feet. IL 70
built in the dam between the retail
~ ing Wal on the pumping station Sit
Oil and the bulknead. After the retaini
walls are completed there is an ir
, ulense amount Of filling 70 be done a
=. thsre viii De also a. large quantity
earth and stone, which has be
:, thrown up around the forms, in t
~ channel Of the river, 10 clear the b
~ Of the stream.
IN Zip rap !. - 3 ciled around I
m down stream end of the retaining wa
~ 70 prevent the wash from the cure
IN running behind and undermining the
~ The contractors nave gang of abe
e. forty men. most u whom are Bulgs
y" i2uG IN rho work Whom tho copcr,