Elmore County Republican. [volume] (Mountain Home, Idaho) 1910-1915, 1911-07-29

rendered nascent or live. Such water
drawn up or flowing through we'll
which tap the flow is generally of
better and more satisfactory qualit,
than water from flowing spring du,
to the fact that many springs are of
ten mineralized or charged with chen
ical properties taken from the GREY
ices and cracks in the rocks through
which the spring has found its way
to the surface.
With this brief introduction, the
reports on the Hammond and SwaI
Sources follow.
Estimate of Additional Cost of utiI
izing the Hammond Springs
Supply.
The distance from the nearesr
point on the present pipe line to the
Hammond Springs is stated to be
at least seven miles. For the pur
pose of this estimate and in the alb
sence OF exact data, | have called
the length of the required pipe line
$4,000 feet. The difference in eleva
tion between the above two points
Is given as at least 700 feet.
This head being too much for di
rect pressure in the town, and some
storage being necessary, a covered
reservoir could be put in at a point
where the head on the town would
be about 225 feet. This would give
about So pounds static pressure in
the village, The head from the
springs to the reservoir would then
be 475 feet, which would call for two
classes of pipe, one for pressures from
Q to $50 feet head and one from $50
to ATS feet head. would not advise
the use of wood staye pipe from the
springs to the reservoir, first on ac-
count of the high pressures in the
lower half of the line which would
call for heavier and closer wound
wood pipe than used in the town
now, making its cost not far differ
ent from wrought iron and also be-
cause a pressure in the vicinity OF
200 pounds per square inch will
cause the water to ooze through the
wood itself; second, because Of its
difficulty of access and its conse-
quent high cost for maintenance and
repairs which should be reduced to
minimum in case of wrought iron
pipe; third, because the line from the
reservoir to the springscould not be
laid in duplicate on account OF cost
and hence the single line would be
the sole dependence of the village
for its water supply and therefore
should be such as to reduce to a min
imum all danger of breaks and leak
age.
| assume that at distance out
of about 10000 feet from the end of
the distribution piping nearest the
springs, reservoir site can be found
that will give the required elevation
of about 225 feet above the town.
The supply main from this reservoir
into town may be of wood pipe, of
proper stave thickness and wire size
and spacing because it can be easily
reached for maintenance and repairs
But it should be in duplicate tsee
Fire Underwriters letter. for this
section, though both lines DO NOT
NEED to be Of capacity sufficient to
supply all the water required for Pc
RODS of maximum use. II is best,
however, that they should be so.
One inch line would meet the re-
quirements but it would probably be
satisfactory to substitute 2-6 inch
lines in place of one inch line.
Two inch lines will deliver about IL
per cent more water than one inch
line and both could be In service all
the time except in case of break or
repairs in one when the other would
tide over the breach and supply a.
bout Sc per cent of the capacity of
the inch line.
With regard to size: the line from
the Springs to the Reservoir should
not be less than inches In diameter
as a large percentage of the static
head Is required to overcome friction
IN the pipe and allowance must be
made for differentiation of the int srior
of wrought iron pipe as time goes on
which largely increases the friction
factor and reduces the flow.
Probably six inch line would do
1ut | would not want to say definitely
until AN accurate survey had been
made of the pipe line. The inch is
figured to deliver 500 gallons per min-
Continued on page 4.