Rock Island Argus. (Rock Island, Ill.) 1893-1920, 1899-07-12
RESERVOIR REPAIRS.
Continued from Fifth page.

Continued from Fifth page.
| TO a head Of water in either filter when full
| and to the additional unbalanced pres
| sure upon the wall caused by the Opposite
filter being empty
To remedy these various defects we would
| recommend,
| l. That a solid compact concrete wall Is
| inches in thickness and extending from Is
| inches below the bottom of the footing NJ to
i a level with the floor and connecting therc-
| with be constructed Immediately along both
| sides and adjoining the Iootings OF the cntii e
length of the walls between filter basins Nos.
| ! and and l and I. and around the walls
of filter regulating house No. =. Having been
informed that the interior of all the footings
of all the other filter walls had ben pro-
tected by puddle wall placed along side
and beneath the filter floor since the walls
were constructed, and not having had an OPP
portunity to test the efficiency OF this rein
forcement against seepage, we are not in a
position to advise you regarding them.
Should IL hereafter develop that the puddle
placed along side these footings is not
sufficient protection against the seepage
flow OF water through and under the footing
OF these walls, then the same remedy
herein recommended 20 be applied against
the interior partition walls may be effectively
used.
> The leakage from one filter into the
other has shown that the so-called asphalt
filling of the joints affords no adequate pro-
lection against flow of water through them.
We therefore recommend that the sand and
gravel be removed from the floor of the
filters progressively and the joints uncov-
Ell ed be raHed out and thoroughly cleaned TO
their full depth. Fin Portland cement
grout should then be forced through these
joints under pressure to fill any existing
voids under the floor paving. after which
the joints should be joInted up compactIy
with rich Portland cement mortar. The
gravel and sand after being properly cleaned
and screened should then be replaced in sui
able layers the floor. Before the gravel
is replaced upon the floor, additional drains
should BE- laid and properly connected with
the effiuent pipe in such number and places
OF get the best efficiency from the various
HlterlnR
? In order TO reinforce the various walls
around the filter basins. which consider
light to resist the exterior pressure when
any basin has been emptied for the purpose
Of removing the sand and gravel. would
tresses against the interior face Of each wall.
dividing the walls into three equal SPACES,
with the exception Of the North walls
of filters Nos. l and where we
would recommend three buttresses di-
viding these walls into four equal spaces
and excepting also the walls between Nos
and and Nos. and which require no
buttresses. These buttresses TO be carried up
to elevation of two feet below the TOP Of
the coping and to extend to a depth of notices.
than two and one half fet below the for.
To remove the objection of carrying
water under a head i'm the conduit placed I'm
the partition wall between filters Nos. I ami
laid in the conduit between regulating
houses Nos / and and that the space
around the pipe and the Interior of the cen
duit be compactIy filled with Portland
cement concrete
Other defects mentioned in this report and
minor matters not specifically herein referrcl
10. should be remedied in a proper manner
according to the best judgment OF your sup
eTintendng engineer.
In regard to the clear water reservoir we
would refer you to report that sub
ject Of June 9th. which covered our recon-
mendatiCn regarding that part OF the work
The successful completion of this work on
the lines above outlined will require the most
careful supervision and inspection under the
direction of a competent and experienced en-
giucer. Our recommendations are based ON
Investigations necessarily limited in extent
and as the work of completion and repair
progresses. conditions will develop which
may somewhat modify these conclusions in
their detail. These conditions must be met
and considered by your engineer as con-
struc;ion proceeds and cannot be forseen CT
forstalleJ in this report. The forms aud
method CT construction Of the several new
works and repairs which have above re-
commended will be shown by detail drawings
Of the same to be hereafter prepared. We
estimate the coat of the repairs and construc-
ton Of the two settling basins. three filter
basins without roof. and the clear water
reservoir as outlined in the above report at
Si4.I73.00- Respectfully transmitted
Daniel w Mead,
J. T. Tanning,
G. II Benzenberg.
Board OF EngineeTrs- 80
Rock Island. Ill July 10. 1899.
The council viii meet again tomor-
row night to 90 further into the SUBJ
ject as well as the appropriation ordi-
nance and other matters.