The copper era and Morenci leader. [volume] (Clifton, Ariz.) 1911-1929, 1915-09-10

when no work was going on. The
cost per man per working day, by
which l mean the cost of putting the
prisoner on the job, for every day ne
actually worked, was $1.29. 1 wish
to remind you that this working day
cost had to include the cost of the
camp force on working days, and the
cost of maintaining the whole force
on Sundays, on days when the wealth
er would not permit of work, and on
days when the camp was moving. 1
might mention here that during the
period of thirteen months referred to
the total number of days lost from
these causes was 81, or 25 per cent
Iof the total time the camp was in
operation on this job. II also had
to include the cost of transporting
the men from the prison to the camp,
which amounted to a total of 2.52,
or Is 40 per man per working
day.
With this Information, and taking
into consideration the facts that the
work was largely repair work and
Ireconstrt ction,i that it was scattered
over some 10 miles of road, that the
average water haul was miles, and
the average supply haul was 81
miles, we will take up the most i'm
lportant matter of all, that of unit
costs.
Clearing and grubbing-largely
mesquite and chapparal-the aver
age cost for some 81 acres was $9.1S
per acre.
Solid rock excayatIon-total guam
tity moved, 1892 cubic yards.
Where this work was SO located that
full benefit could be derived from
the necessary drilling and shooting,
the cost ran from Go cents to SIS
cents Fer yard. When it consisted
largely of shooting OH projected
points, and widening the road at mar
row places, the cost was from $125
to 81. so per yard. The average cost
for the total quantity moved was
$1.27 40 per yard.
Loose rock and -boulders-to: a.
quantity 5000 cubic yards, ranging
in cost from 26c to sic per yard
this latter being material that had to
be shot, although it could mot prop
erly be classified as solid rock
average cost &C BLOC per yard.
Earth borrow and excavatfon-to-
tai quantity 2O,42S cubic yards,
ranging in cost from lac to 45c' per
yard. Most of this work was on
steep hillsides. Average cost
i25 2-10c per yard.
! Foundation excavation total
quantity 6SS cubic yards; average
cost Sc 1-10 cents per yard
Dry walls-total quantity f2G Gu
bic yards; cost S1.1S IL per yard.
Bubble masonry-totaE quantity
1912 cubic yards; averoge cost So. 50
per yard.
| Concrete-total quantity f16 Gu
bic yards; average cost S13.16 per
yard. This high cost is principally
due to the small quantity placed,
which did not permit the men to OBJ
tain experience and skill in form
building and concrete mixing.
Dftching qusntfty 5000 Gu
bic yards; average cost 50 Bloc
per yard.
l wish to also submit the costs of
the work done so far by this same
camp on the Tucson Florence high
way in Pima county. This work is
new construction, and in conse-
Iquence of not being scattered, is be-
ing done cheaper. The average water
haul has been miles and the sup
ply haul miles, and we have been
able to reduce the cost of prisoner
working day to la 40.
The unit costs on this work have
been as follows:
Clearing and grubbing, $15.S2 pei
acre.
Earth excavation and borrow, 1855
per cubic yard.
Solid rock excavation, .S44 per GU
bic yard.