Rock Island Argus. (Rock Island, Ill.) 1893-1920, 1909-10-19

ors, ID as TO completeness Of plant,
~ economy of operation. and 60
proper amounC to be invested by the
city.
| In the bid of the Pittsburg Filter
Manufacturing company we have a
well worked out plant fully equipped.
Aside from the special value of COW
cred coagulation basins we feel that IT
represents present day practice in
every way, and will be a satisfactory
proposition to accept
We have closely studied a compare
son of this proposition with that Of
the American Water Softener company
and two things incline us TO recon-
mend the Pittsburg Filter Manufactur-
ing company: First. that the utilizing
of the sedimentation basins for stor-
age as proposed by the American
Water Softener company, while valud-
BILE to the operation of the river pump
| ing station, certainly complexities the
proper period of coagulation and it's
adaptation to waters of various tur-
bidities and when it is considered that
over rs or so per cent of the work of
llC plant OuSnA W NC dNNOlii JliSllCu III
the coagulation basins. both in the
clearing OF the water and in the ex-
pense of operation, the Importance Of
these factors can be more fully appre-
ciated. The Pittsburg Filter Manu-
featuring company intends to hold the
water of these basins fairly stationary
at the same time there is some lati-
tude for storage by gravity. Second.
the clear water storage in the old fill
tiers as proposed by the American
Water Softener company is not entire
ly available owing to the low eleva-
ton of their filters except by pump
ing. This pumping is not obligatory,
of course, as we have fairly ample
water storage in the present clear
water basin, but at some time In the
future when clear water storage be
comes more valuable the necessity IF
thus repumping the filtered water
makes the Pittsburg Filter Manufac-
turing company's design look more ad-
vantageous to US.
1t may also be mentioned that it is
possible to equip any of these PROPOSE
tions with pumps which would utilize
the full capacity of the sedimentation
basin for storage, although this plan
will always conplicate the proper CO
agulating period.
Taking everything into considera-
ton. we feel that after carefully
weighing all of the relative adyan-
tages and disadvantages of the several
lowest propositions on the basis of
economy of operation, fexibility of co
agulation relative completeness. cost |
under the standardizing table and the
amount OF the investment the city |
must make at this time, that the Fits
burg Filter Manufacturing company
presents the best and most adyanta- |
geous proposition for the city to select. |
In addition to the proposition which |
they make we believe that ii would |
be wise to install additional pumps
which may be so arranged as TO pump |
coagulated water from the sediments
ton basin to the filters on emergency
if required. or wash water from the |
wash water settling basin to
the coagulation basin if necessary.
We question whether some slight |
in the arrangement of battles !
proposed in the sedimentation basin |
might not be advantageous. this. how
ever, will not change the expense of
the proposition. One or two other |
minor details should be more clearly
specified 90 as not TO lead 10 future
After all of the work reasonably re-
quired under the Pittsburg Filter Man.
company's bid is done
there will still be left to the city the
following minor expenditure to COM
plete the plant and put it into opera
ton:
1. Repairs of the broken sewer
which collapsed last summer.
=. Proper wire connections for
electric light and power
8. Fitting up of laboratory with
suitable archaeological and chemical
4. Installing a driveway to the
street for teaming purposes.
5. Connection with city Waterman |
for laboratory.
6. The expense of an analyst for
final test of plant
Z. Engineering and superintend- |
ence of the contractor.
s. Furnishing the office.
9. Repairs to the bottom of the old |
filters Nos. 1, 2 and if necessary.
10. Installation of a new fire pump |
and connections
Our thanks are due to your honora-
BILE body for the confidence you have
reposed in us in this important mat
ter, and also to the filter companies !.