The Morgan City daily review. (Morgan City, La.) 1916-1920, 1919-03-12
Concrete Facts Show Advisablity Of
Using Shell for Road Sub~Base

:. ceived to bring average material up
to 50 per cent metal.
e 1t appears highly essential that
e gravel be inspected and metal con-
: tent determined by test either at the
Y point of loading or at the point of
t application. else an uncertainty pre-
: walls as to the efficiency and value of
: material applied to road.
, In a previous isue, it is suggested
in the interest of certainty and SIM
plicity that all material be inspected
and tested at its source under juris-
diction of the Highway Commission
this definitely fixing responsibility
for quality of material.
The economy in using cement shell
as sub-base with a gravel crown as
recommended results as follows: A
road IS it, by s inches deep requires
1000 cubic yards of material and with
30 per cent metal gravel at SET 1-2
per cubic yard f. o. b. cars, Morgan
City, calls for s4550O0 per mile. Ce-
ment she'll at o0c per cubic yard calls
for Sl8OO.OO per mile f. o. b. cars, Nor
gan City Ito this inch shell sub
base there can be added 3 inch 20
per cent metal gravel crown or wear
ing surface made up of 44O cubic
yards of 50 per cent metal gravel and
294 cubic yards of 100 per cent grav-
ell. total 734 cubic yards of gravel at
S2.28 f. o. b. cars, Morgan City cost
ing Sl673.52, We then have an II inch
cement shell base, gravel go per cent
metaD crowned road, the material
for which costs (f. O. b. cars, Morgan
City S3473.52 per mile as against
$45500O per mile for an 8 inch all
gravel $50 per cent metaD road. The
result is road carrying 81 per cent
more material at "a per cent less
cost. AS to material we have: In an
8 inch $50 per cent metaD gravel
road:
1000 cubic yards of metal
1000 cubic yards of clay and sand
50 per cent.
In an II inch cement she'll SUBJ
base gravel GO per cent metal)
crowned road.
14OO cubic yards Of cement she'll
$50 cubic yards of clay and sand
80 per cent.
Sl4 cubic yards of metal
1t has been proven as outlined
above that material carrying 50 per
cent clay and sand will not withstand
heavy rain fall as we'll as material |
carrying 80 per cent clay and sand.
In the face of restricted supply of !
gravel, particularly metal content
the wisdom of the Highway Com /
mission in recommending the use of
shell as a sub-base and the conser-
walton of gravel for use as a crown
or wearing surface is patent.
In previous issue, mention is
made of the probable requirements
of o5 parishes during six months
building period aggregating upwards
of 1000 carloads per day to be filled
from supply of about z;cc carload,
per day. Recognizing this seri .us
condition the State Highway Com
mission under date of Feb. 10Th urge
us to utilize our supply fcement
shell to relieve the situation.
In previous isue mention is made
OF the fact that the parishes in the
immediate vicinity of Morgan City
alone plan to lay 120 carloads of ma
terial per day out of this total SUD,
ply OF ESQ carloads per day leaving
$50 carloads per day to supply the
other 90 parishes with road mater
ial as we'll as requirements of. the en-
tire state for concrete material and
ballast AS our natural prorata
would be about cars Der dav. anv
prospect that we will receive 12O
cars per day from present source If
supply seems absurd.
As parishes in immediate vicinity
of Morgan City will derive quickest
and most benefit from this additional
supply of material it is believed that
they should at once support the
State Highway Commission in its ef-
forts to assure such supply by re-
spending to Mr.. Buie's letter of Feb
10Th. 7-s-r-n
In recognition of the situation. the
following districts have indicated 70
the State Highway Commission that
they expect to use approximately the
following a mounts of cement she'll
Ward 2, St. Mary parish, 10000 Gu
yds,
Iown OF Patterson -. $1,000 Gu. yd.
Houma District
ieireoonne ......... $4,000 Gu. yd