Evening times-Republican. [volume] (Marshalltown, Iowa) 1890-1923, 1916-10-11

sections II ana ~, blaCkneWk TOWN.
ship. Applying the unit prices OBJ
ttained under their blanket contract fol
1913, to this bridge, the cost would be
as follows:
Structural steel, $4,000 lbs.
at $5.45 per 100 lbs. (.
o. b. .................. 3,S7S.b0
| Hauling and erecting, 40
feet, at S1.75 per foot 49,. $500
Concrete sub-structure and
floor 2A cubic yards, ut
$13.15 S'zVo.ov
Total cost under 1918 blan-
ket contract ..............$ G43s ~
Contract price, 1914 ........ $4,000
Amount saved ............$ LS1Llo
Saved $843 In Harrison County.
The blanket contract price IN Har-
rison county, in 1912, was at the rate
Of 1929 per 100 pounds for steel IN
sixty foot truss spans, I. o. b. cars
any station in the county. Two
standard sixty foot pony trusses were
let at the public letting on Sept. 30
1914. The estimated weight OF the
two s0-foot pony trusses was $500
pounds. The cost of these trusses, 1.
9. b., under the 1912 contract, would
be az follows:
So, 900 lbs, Of structural steel,
at 1923 per 100 lbs. .......$ 7.613.S
Low bid received Sept. IS,
1914, two 60-foot spans. $4,000
Amount saved .,.........$ e4S.st
Big Savings in o'Brien County.
The blanket contract in O'Brien
county for 1913, entered into before
the road law became effective, pro-
yided a price Of $3.50 per 100 pounds
for reinforced steel in place. This Is
the equivalent of s2J35 per 100 pounds
for reinforcing steel, I. o. b. cars. In
1914, 12O,450 pounds Of reinforcing
was purchased, ana 1890 pounds OF
this was bent and cut to lengths. The
average price was S1.71 per 100 pounds.
l2o,45O lbs at 1894 per 100
lbs Q913 price, -........$ 2,eie.oo
l2O.45O lbs, bought in 1871. 2,o6l.4s
Amount saved ............$ 7o1oo
In 1914, O'Brien county advertised
tor cement, and secured price OF Al n
cents per sack. In 1913, the county
bought cement at retail. and paid 50
cents per sack. In 1914. $3.50 sacks OF
cement were used.
$3.50 sacks, at so cents.....* 4,42o.W
$3.50 sacks at Az cents =. 3,672.Io
Amount saved ...........S i'Hs'
It should be remembered that in ad-
djtion to the saving Of s55l.6S. the
county secured better and heavier cul-
yerts in 1914 than in 1912-19lS. rms
saving is due to advertising FOR bids
On this material.
Saved s1o,5s1. in Sioux County.
Under the existing blanket contract
in Sioux county, in 1913. nine concrete
bridges were built. The plans on ME
for oneSof these bridges are SO indeI-
mite and lacking in detail that 1t Is
impossible to figure the quantity OF
required. The quantities re-
oIired by the plans on file for the 9TH
er eight bridges were carefully estl-
mated. and found to be 962.06 CUBIC
Yards. The contract price for these
eight bridges, S15,423.12. was at the
average rate OF s16.o2 per cubic yard.
In 1914. two public lettings were
held. at which contracts were let LOT
one concrete bridges. ranging
in size from two 40-foot deck Orders
to 2x2-foot box culverts. The plans
for these seventy-one bridges require
2.291.5 cubic yards of concrete and the
price $2S.12S.73, is an average OF sl1.4o
per cubic yard. This work being Oh.
vided into so many small cuYerts, and
only two large bridges.
should ordinarily be let at higher
unit price than the eight bridges built
under the 1918 blanket contract, with
which a comparison is made. These
eight bridges, built in 1918. consisted OF
no small structures. the smallest being
a 2O-foot span and the largest being
two spans, 30-foot and 40-foot. re-
Yet the 1914 prices, secur-
ed at public lettings. were an average
OF s4.62 per cubic yard lower than the
1913 blanket contract price.
Cost Of seventyone bridges.
let in 1914. when figured
under 1918 unit prices,
2,29l5 cubic yards. at
1892 $3.50, ioS.eo
Cost Of seventy one bridges.
let in 1914, at public let
ting ............... 2o,lzo.!o