The Donaldsonville chief. [volume] (Donaldsonville, La.) 1871-current, 1916-12-30

|
mate the necessity of extending and
maintaining the present lines.
Total cost, $6055.
Second. The installation of sur,
face reservoir having capacity OF
| 100000 gallons of water, together
with the necessary ,low-duty pumping
unit for cleansing, and increasing the
depth of the present pump pit and
| lowering the pumps proportlonateiy
The present arrangement of sue
ton piping outside of the pit Will
permit of the lowering of the pit floor
| land consequently the pumps) about
! four feet. This will not bring the
suction head within the desired limit
mentioned, but will be considerably
better than the present condition.
In addition to the foregoing, the
suction and the discharge lines of the
pumps must be connected to the river
and the reservoir in such a manner
that either may be used as a source
of supply, and the latter as both sup
ply and discharge, as in the first meth
cd. Also, a suitable barometric loop
and air chamber should be provided
in the suction header of the pumps
and connection made to the inlet OF
the vacuum pump. Centrifugal and
vacuum pumps will then be operated
simultaneously. In lieu of the air
chamber, connection may be made to
the suction elbow of each pump.
An additional vacuum and motor
should be provided as "break down
unit.
This method offers complete relief
in case of fire and partial relief in
the every day operating conditions.
Total cost, $6330.
Third. Installation of 800, 1000
gallon surface reservoir with the
electric-driven cleansing pump, and
an auxiliary pumping unit located IN
concrete pit on the batture and as
near as practicable to the waters edge
at low stage.
The present suction lines to be con-
nected to the discharge nozzles of
the new pumps and other necessary
connections to be made to the reser-
voir substantially as stated before.
The new pumps to be provided with
10" by-passes and the necessary gate
valves.
With the above arrangement, the
river pumps can be made to pump dl-
rect into the suction of the present
pumps or into the surface reservoir.
Consequently the fire and surface
pumps can draw their supply from
either the river, through the river
pumps, or from the reservoir. When
drawing from the latter, the river
pumps can be made to furnish the
makeup water. The by-passes per-
nit of shutting down the river pumps
at the high water stages of the river
and drawing all water direct from
the river by the present pumps, re-
sulting in a power saving.
This method offers complete relief
in both fire fighting and general SER
vice operating conditions, and if it
is your desire to continue to supply
river water for domestic consumption,
this is the method to be recommend
ed for adoption.
The mechanical objection to it,
however, is that while the mainte-
nance cost of the suction pipe lines
will be greatly reduced, it will not be
entirely eliminated.
Total cost, $11,671.
Fourth. The installation of a
300, 000-gallon reservoir with motor
driven cleansing pump, the drilling
of two deep wells, and the installation
of the necessary air-lift pumping ma
chinery.
With this equipment, water will be
pumped from the wells into the sur
face reservoir and from thence drawn
by the present pumps and forced into
the distribution system. The suction
lines to the river can then be either
abandoned or simply allowed to re-
main ostensibly for emergency pur-
poses and to meet the probable de-
mands of the Fire Prevention Bureau.
There is every reason to believe
that an adequate supply of drinkable
water can be obtained from wells not
exceeding $50 feet in depth. The
towns of Plaquemine, White Castle
and Napoleonville, La, all in your
immediate vicinity, enjoy such water
supplies.
By pumping from the wells with
compressed air, the water is purified
to certain extent by oxidation and
is cooled as well.
This method offers complete re-
lief in fire fighting as well as general
service conditions, and has the added
advantage of clear water.
Total cost, $4,000.
| shall be very glad to prepare de-
tailed plans and specifications on any
of the foregoing arrangements that
mands in this regard.
Respectfully submitted,
EDMUND M. IVENS, M. E.