, 1874-10-09

| IAA1Gu54Ju OF [uQ1cl TGStT5ri
NeW pump InS-WoTks, engines ctr '''....,{ hn.
| Hew lake tunnel. sas.4
I Stone STRUCTURE It crib. ''...... ~
Gate-shafs connecting tunue;z. ''''..... Gs Gs
7..., '''' '''''''''... ia u
''-'-''.-..'.....,..,n -.
,. THE cITT ENGINEER aeSst
IN hl5 report, cons1dercd 1T laaofh
eteaslnE tue waser-supply OF tia rhttao hi
inoo1sed tho proposition OF the BoarS l9 esr, vi
IN case the project :7cs carried On. ~ heussa
Tor making change in the size Of t4s ,hs neess Ut,
circuit Nuns, which were then benz b;s gnl
ths fhet ~ ~atsp aa, t around the principal
asEed for this purpose. He conts,Sti SStis,eA n.
w2ter-zants, then amounting to si:,s -, th:s Hs
nnnum, would be doubled. and hers;a ga q D.
tihcat1on for tho issuing Of ooaas ~ ~ 5aaoad j
bearing pcr cent intel est. 7t.anM
Ihe report was favoraby receiras
council: and the Boari was "nntneaeJ u
powered, and directed" " to taIa ~ a.
suggested" @4o 1ap!e7aa,as
This action was taken before the ,o.
tuition was adopted. aad the c;ty W. .sS ~. Co2.s
aak the Legislature for authority tn r.;o ;osasss
1hle "aa doao, and the Council w,s ~ aas. nd2ey
to Issue the 81, 100000 watar-oonds tTT'pose'ei
p1aced upon tto market and readily toiI ~! Ft:a
greonoac.s Tere put into tae Civ Tra,,aa aa u
tno eseal' u sne 'unnei and uater-pipa s1t.e3.t
rRocaAsT1SAT1oy.
Iho Woru immediate" Seems to h.
nous with procrastination in tI,e~oae.sy ~
the Board Of Public Work. s;.se eaaalt:1a
had been done toward tbe AAs sossa;
ment OF the proposed tuonsls m ~ t'a5esst ~
Of October. 1871. That event =, " u. il
| knows, upset everything for . time gse gS,es5asl
OF the West Division having los1 c,r1A 1aa pea2a
little were not obliged to devote tbsaa't1 tbsgssa;a't
measures which would cnable theTo ~ saIass
hence Ihey had asnple time to 1enar s.'s ~ a's;
mano Tor more water. Tbs Chic,-o szs a.
Works were badly danl:ged By fire. and M. a.saS
the West Division, bat the who,e city sos gu
out water for week OF moro. "4a IT,
As soou as matters were st-airhia,os :,
board OF Public Works advertised for ,easns oss ~
for the construction OF the lake tnnna. ai'p1as s
contracts were let. aud the yorl; uss ,st as II.
last June- OF this tunnel, hovayer II. thpe.sa ne.
article has nothing to do, since it h.s -
been referred to IN TIE TE1BCSe, u1s9
THE CONTRACT AWARDED
subsequently bids were received for co,,4,
ms tue land tunnel andtto Board titay z.I..sas
tho trim OF contractors whom they rass:s'sa ss:.se'sa
tile Lowest responsible biller." ~ aIta: ":
another person was less, and, feelnr ,,a.e! ~ .
that he did not receive the int contr.st s.'a =
carried the matter into the courts. Il rars..3 q
there over year, and Of course nothne sslea
bo done whilo the cage was pending. Tbs p.s.s w:
however. we're at last Sustained. aud n. .a,.
was awarded to Cox Bros. for st65 1STaa
stipulation being that the tunnel hho1Id - -
completed Jan. l, 1875. 4A1 %
DIFFICULTIES OVERCOME.
As staled ABOVE: the construction Of the tn,
nei IVES not considered difficult il tia 49, 49,
proved as free from obstacles a. tia hor;.s
made by the City Engineer indicated ~. ..es -
serious 1mpedlmeuts were nuticipased i. .no.s
By tue fact that the lake tunnel was co,nmsn".1
fret- The conjectures OF Mr. Chesbropsh ~
IN the nala correct, only faw boHlisrs md
sand pockets being encountered, tha renmsl
OF which delayed the worknen but ahor. tim.
and tho conduit was completed vesteri.r-o1.,
two months sooner than tile CONTRACT csitea f~
The contractors commenced operation, ~
IN June, 1873. Nine shafts wero commenced H..
ultaneousiy in the following locations, IL d..
tance between them being mile: Illioo;s,;rzat
between Dearborn and State; Franklin srret.
near Randolph; Jefferson street, ~, ya1
Euien; Polk street, near Halstad: vii
!e1 street. near Centre avenue; cgu7
at the corner of Twenty-eecond s,ret .nd
Ashland aveaue, where the auxiliary pumnips
works are to ba located. These shafts va,iedn
depth from 80 to 40 feet, the tunnel runruz
gradually up hill from Chicago avenue toths
southern terminus. This mar appe1s s;rguu
to some people. but it is said to Be imma:s1l
~hether conduit is laid level OF on IN infinA
sinco water pouring into one end will r.a il
eyel, and the surplus, il not pumped cut, nj
unnel is q feet below low water in tbs LII
Which gives all the ''down hill " necessary.
UNDER EEADwAY.
The bottom of every shafe was below ths h4
i the tunnel, "sump," or basin, being see4
ary to catch the dra1u-wctcr. When e7fists
epth had been reached, the miners, OF Hba
hero we're two gangs in csch section, o1srs
eE:ng the other every eight hours, connered
1caYat1ns; tho masous, who uero "doE1be
'w for eight houru. following in their v,ss
nd laying the bricks as rapidly as possible. III
or1ncr wonld advance IS feet day sonstnA.
nd ut others would spend tie whole ds!, ri
two and threo days, in renofngs
ock which blocked their path. Another, ba.k
ormdabie, daSba was encountered IN txoG
hree places. which also stopped the work IN
orar'tg. This vas mud, Which it WAS diffcuk&
ct rid OF. Carafuli after car.futl would b. riss
, the mouth Of the shaft, still il did rn:.Y
arently diminish inquantity. Persistent sEmt
owercr, would at length remore it, zadsal
orkmeu be enabled to proceed.
MINERS p1cEs
At como points tho miners we're alarmedhy Ut
,nit3o1, Of coulbusiible gases, but they soon b.
lms used to the sudden ''da.a-up," md, b,
topping on their faces, avoided beng burned
oine u! Of them were a. trss nn2waFa Of fae p.
lnarttscs or these gases, and IN couseeaeaca
ma1ucd in IN upright position. and II: ta.u
'ebro'Es cIispel and their bsir and Thssen
nSed. Aalt dozsn Hero ye5 uafossanats;
I'd had to lay OF several days % 'ccoass g! q
cir lnjurles- No oao suffered sot uaas q
eah air, rubber tube sapp1y3ns Pae II
illo tho foul escaped through tbs saaih saa
NJ one fatal aeeidont occurred, saa snas!s