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

plant at Cincinnati. Ohio
Novel in Design.
The filter submitted by Mr.. Light
cody is novel in design, having espe-
cially deep gravel beds, and a concrete
manifold system The working out of
these details by Mr. Lightbodys engi
Ineers have very favorably impressed
Us as being in the line of progressive
Improvement in this part of filter de-
sign.
Mr.. Lightbody proposes to line one
of the old sedimentation basins with
a waterproof lining consisting of felt
and asphalt, covered with a layer If
brick laid fiat in herring bone fashion
| This covering to be for the sloping
sides only, the clear water reservoir Is
TO be lined in the same way as well
It is then proposed to place suitable
battle walls in the sedimentation basin
mainly of terra Gotta so as to avoid
excessive weights on the reservoir lin
| ing. The level of the sedimentation
basin is then to be maintained at Il
maximum height of about one foot be-
| low the coping, thus enabling the use
of the full capacity of both the sed:
mentation basin and the present clean
water reservoir. The sand level IN
Mr. LiShtbOdy's filter is at such height
hat a fluctuation of about four feet in
the level of the sedimentation basin
can be permitted under those condi
tons. Suitable fexibility of coagulat-
ing period is arranged for and ample
connecting pipes from the filter to
clear water basin are provided.
There is also an exceptionally ample
depth of water over the top of the sand
filter bed provided for
Mr.. LightbOdy asks for this plant. all
of which is quite carefully detailed and
specified, the sum of $4,000.
Plan of Norwood People.
Norwood Engineering company,
Ference Mass.-This company pro
poses filter plant built in the old i'll
ter basin No. 1, capable of being ex-
tended to the south for a future re-
quirement of 100000 gallons daily
The standardization basins are not TO Re
refined but the water level is to be
maintained in them at about three AMI
One-half feet below the top of the COP
ing at which level it has been demon-
strated that these basins are tight.
Both of the basins are to be baffied
for coaSulating purposes with wooden
oattles and skimming wires and there
Is a special arrangement of iniuent
and effiuent pipes across the north and
south ends of both basins so that the
incoming and outgoing water is uni
formly distributed across the ends of
for a reasonable amount of flexibility |
in the period in which the water is 10
be cOagulated and the coagulating |
basins are to be connected with the |
filter house with 4S-inch cast iron pipe
The building proposed by the Nor
wood Engineering company is ample !
and commodious. being equaIed in this
respect by only one of the other bid
ders herein described, that of the Pitts
burg Filter Manufacturing company
About $1,000 thousand square feet Of
available floor space is under roof and
there is roomy laboratory, office and |
coagulant store. There is to be a !
clear water we'll under the filters and !
the water is conveyed to them by con- !
crete influent conduits.
Mixing tanks are provided for lime |
iron, alum and hypo-chloride solutions |
with complete outfit of stirring, mixing |
and pumping machinery.
The filters are completely equipped |
and are at such an elevation that |
variation of about four feet in the CO. |
agulating basin level may be obtained |
should those basins be lined in the fu- |
ture. The filters are provided with |
automatically operated valves worked |
from central table for each filter.
The proposition further includes a |
Sc and 3O-inch effluent pipe laid on |
piers to the south side of the clear
water basin so that circulation can he |
obtained. There is also a driveway of |
concrete provided so that the coagu-
lent can be brought to the building
without difficulty.
The plans and specifications for this
plant are very complete and creditable.
This company's proposition is to IL
stall their complete plant for the sum
of sos 500.
Roberts Filter Company.
The Roberts Filter Manufacturing
Philadelphia. Pa.-This com
pdny proposes hlterlng plant on the
site left for the old NO. filter. capa-
BILE of being extended when desired
They propose a novel feature in the
installing of a specially built coagulat
ing basin of about one-half million gal |
Ions capacity in and on the old filter
No. 4. This basin is to be covered and
built of concrete and provided with |
suitable inf1uent and efIuent battles
1t will give about two hours coaguIa
ton period on the full capacity
The Roberts company also propose
to empty the old filters Nos. 1 and
Of their present sand and gravel con
tents and use them for clear waite:
storage basins. adding thus about 2,
100000 gallons available storage for
clear water. The present sedimenta
ton basins are 70 he left practically /