The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1893-01-30

! the lace vas gradually driven Inc rams
/ gave place 10 timDe-ing and th* rails were
/ forced forward
! At the same time detected <eunnel vas
/ abandoned but it had 20 oe li-ed I'D 80 as
! 70 proven. settlement. This rs done D
/ means OF cribs made something ike log
/ house. and the compartments filed With
! earth, under heavy streams 81 7saier from
/ every part Of the roox.
The work on the main tInSel vas re-
| nesed under the rail roof des@r bed. the
/ Tnen being protected by b-east boards
+ against the treacnerous earth. 2Mr. Ihorn-
| son thus describes IL:
In This manner she tune! res carried !or-
! ward about twenty feet. the vo'1: being done
under torrents OF ws;eT, zat tin DeSa SIT up al
very s2oEt Intervals. From I'll. on sa.r progress
wss made ior ff.y-:so feet, OF nirsteen feet II
advance OF tae ''cff-e:'' gsEgxsy eleven feet 70
/ the southwark A. rois poia. Ere ssater again
/ broke in with tTeEu suGOus fo-ce, @tA2t when
! had heretofore flowed on. through che .'osses"
/ gangvsy disappearing. and 81 apparently cen
I tering q: the '.tEcs." We UudesroOk 20 re-
| lieve the pressure By drawing tns water into
! the gsngway lack Of the .iacs" By Eyoring holes
! IN various directions six OF .iasse were
| barred z. poiats from ten 20 twenty
| Zee. back, passing through ,brze % tx
| feet Of fin rtge clay then lexeept in one IL
esanee} icterceptiag sand seams, carr ing water
A section OF perforated :brea-Ie5 pipe was
/ placed in each hole penetrating y the. sand
seams, ana these pipes discharged * their Nal
/ capacity for several weeks. The skstches here
/ inserted were made Oh the spot ~ = V. BOuil-
| lon, our Office artist. For some weeks This dis
/ charge amounted 10 an average OF i37, 5j+ gai-
| Ions ger Cay, the ordinary daily fE5g prior 10
/ that time having been 5000 gs5lonA This
! great increase was uadoGO ted.y 'ss result Of
| our draining some sgoierraneaa .sssr course or
xsrgtx
OF course extreme difficult ami vers SOW. Alter
| fighting our way through sucs grous;d 10. nearly
three months, with water pouring n upon the
| WORK from sides. roof aa1 ''iacs. reduced
| the heading 10 width OF forty-tmo inches a.
the top aud i've is2i az the bottom. the former
"!ace having been about eight feet 4Eide at the
| top and nine feet az the bottom This ahead
| ing has now been carried forward 9Th results
| in favor OF true economy. Tie Enatssial through
the las, thiEsyfye Or forty feet has zen coarse
| sand, in which II has bean impossible for the
water 20 concentrate.
! Tie WORK east from the Depo, sxrees portal
/ had on the lst OF June, 1s92, beeH driven for
ward 1,4.7 feet, the last thi.tyfve oe forty feet
| o. the geugway being very low and as-row. the
! face" being less than four feet squz.e.
! We continued excavation OF i.Is face under
serious difficulties, Tor long tine being com
| pe!iel to divide the face into three conpsrt-
ments in order to Withstand the n sense press
ure. About December this 'faoe' was also re-
| cuced 20 the narrow form OF "1e::ing" used
| west from the shaft, and aimee tssI time pro-
| gress has been much more rapid, although il
| has .een necessary TO divide even this small
| "lace' into Two compartments "a orde. 10
| proceed.
| At the present date January 8, ls43l there re-
nlails abou: 60 feet TO be excaya<ed between
| the present headings" and VI !es the presen;
| uD.avoraOie conditions of progress II viii re-
| 9uire about FIVE or SIX months - coanect them.
James Mcnamara was appointed fore
| man in charge Of briekwork, and w 20 the pres
ent date ], 1876 feet of the finished lick sewer,
six feet in diameter in TIE clear has been laid
III tina; portion OF the tunnel east fre*sn the shalt
! near Lombard and Republican streets. The
two shafts excsvsted for purposes of vertila-
| ton along this portion have been hned 10 tie
! surface.
The financial part of the reporz will have
! an interest even beyond that aroused by
the narrative of construction. Ar. IAom-
son says:
| Al the accounts Tor iabo- and materials used
! in the cons tructon of the tunnel have been
| kept by this department. The DIFFICULTIES en-
/ c0unte.ei in the work have made tie exIendi-
lures a- in of all past estiinszss. That X
| may be understood exactly how the FUNDS have
been expended and what must b. Igov.ded 10.
! completion, submit herewith e. Financial
s,a,emen; of the Lake Union sewer t.innel from
| the com raeneement OF work to December 81,
| 1892" The total net expense to December 81,
/ lsJ,, was $50 s69. 81 From this statement,
I tatuiated by months, /, vii: be no
| tced that s36,422.97 had been expended
| for 'exeavatng and tmberlngs in the
| tunnel prior - May 81, 1892 the
date l TOOK chargc. During TIE past seven
| months S2),423 has oeen spent in continuing the
| excavation, while $500 81 has gons for labor
| and materials used in lining the t,:nnel, Offset
| by credit OF s. 50i.6l, value of ceeent brick,
| etc, i hand. a net expense OF st2,56a7 20 for
| finished lining OF 1.i36 feet. The tosai expense
| OF maintaining the pumping, hoistihg and Ven
tiiating plant has been SIS 5S5. Il, or average
| OF s675 per month for the period preceding june
| !, 1897, and S6s5 per month for the se:en months
| since that date, showing the Increased quantity
| OF water required 10 be pumped. Tee total ex-
| pense for engineering ana incitenta-s Is shown
to be s2.l3o &, about 2i per cent If the total
expenditure Il low percentage, cons if5erlng that
| II includes the preliminary tests Of tie ground,
| ali Office aud field work, and the thosough test
| ing Of al cement, brick and othes materials
| before going into construction.
| From the data Il. hand aud the experience
gained, considering that the present. difficulties
| Will continue until the "heatingn" are con-
| nected, | would estimate the amount necessary
20 complete the excavation at $1,000. The
| maintenance OF the pumping station during this
| period will cost additional i4,0t1, or total
estimate OF 81! 900 for the compIetlots or the ex
cavation. should we be so fortGna,e as to en-
| counter frner ground, better progress will be
| made and the expense correspondinE<y reduced.
! The amount remaining of the original 100000
| provided for this tunnel is barrel Sufficient 10
| complete the excavation 81 above estimated.
Estimating on the basis OF the portion now
| constructed il will require an expenditure OF
atout $4,000 TO complete the ltnisg; provide
! shafts, gates, receiving sewers sEi flushing
Inlet M Roilin aud Republican st-eets: I'll up
| the main shalt st Lombard aud Republican
streets W tn necessary arrangements Tor receiy-
ing sewage and 8 spiral pipe 10 condsct IL 70 the
| tunnel; construct three additional Inlet and
| ventilation shafts lined 30 the SURFACE and pro-
videG with necessary pipes, build
cut stone portal at the lay termi-
| nus with automatic gate for Storm water
| overflow. and heavy iron pipe wish flexible
Joints to he extended 10 deep wates in Elliott
| tag, about so feet from the shore. With these
| arrangements the tunnel will DC in permanent
shape ready for service, with capacity sufficient
| for ,enioid development OF the district TO 20
| served. and, although CONSTRUCTED 9Th view
! 20 freedom rom expense for repaiEs main
| teDance, should the emergency occar II Viii az
| al times be easy OF access and without danger
| 10 health Of workmen-
The south sewer tunnel was begun Au-
| gust l.. fS93, and has now advanced 500
| feet from the bay end, mostly through
| blue clay. 1t is projected to run unier the