New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1888-05-13
MR.. MLEAN ON THE AQUEDUCT
AN ENGINEERS REPORT ON THE BAD WORE.
A GOOD OUTSIDE APPEARANCE coNcEALs MANY

GOOD OUTSIDE APPEARANCE CoNcEALs MANY
INTERIOR DEFEcTA
Controller Myers yesterday received tho following
report from Engineer Mclean OF tho Finance Depart
ment, In regard TO the defective work on the Aque-
ducts
slr have CONF ,tted my exaurzrcn the new squc-
duct and respectfully report going on
throughout It's course is being well and carefully executed
The WORK heretofore done is Being cossy examined and
tested by tbs engineer, Of the Aqueduct Commission The
tests applied are very searching and wIll I believe in
connection with the records kept Of the work. the In
formation obtained from outside witnesses and the direct
knowledge Of the engineers In charge Of the
work from the beginning finally bring notice all do
fective work THIS defective work has been most
efcctua'ly exposed In Section Q Brown Howard a CO.,
contractors II found that the rubble ing between
the brick lining and the rock has been badly done
pery great extent and the the key and
In other places was seriously defective
Tho engineers have the fully IN their control
and are applying at the expense o: the contractors the
necessary remedies Al Shaft they have adopted the
plan Of drilling holes of inches diameter through the
brick work into the rubbc and forcing In grou
as long as 1t will flow. have doubt this plan will b
efectual in securing perfectly solid backing A the
work Of testing has been completed do think
any definite estimate OF the necessary the
in proper condition can now be made, but the amount r
tanned largo that the city is perfectly secured
There is reasonable fear alleged by some that tho
tunnel completed will be unable resist the pres
aganst It. For about 1917 900 feet there will be
.;le pressure resist the tunnel will be only partly
FULL and the only pressure provide for Will be that duo
20 about eleven feet In height OF water 700 pounds
inch at the bottom. The remainder Of tho
tunnel will be under pressure resist which solid mason~
built back the rock outside OF the lining
Besides the defective work above referred to- there has
been disclosed in Shaft is, Section T. OBrien a
Clark, contractors This bad work is principally in tbs
key OF the arch in bad brckwork and absence Of rbbe
packing Tho necessary correct these defects
estimated between five and six thousand dollars
far as At present disclosed The contractors stand ready
informed to mako good all the bad work that may
be discovered
In my monthly examinations OF the aqueduct have
always visited the points at which the work being
carried have generally found tho inspectors pres
ent and the work, in important essentials satisfactorily
DONE At times have found small defects such par.
TALLY unified joints which did consider 1t necessary
formal report or the defects remedied
as attention called to them Wherever
rubble backing being put In there sufficient
OF mortar used.
As shown the outside face the work appears solid
and frm-t is only by tests such now being
Piled that interior defects be discovered So far
my observation goes all the parties interested are exert
ing themselves to bring light defective work and 70
remedy IT. Respectfully,
EUGENE F. MCLEAN, Engineer.