The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1895-07-28

tide. The lift of the lock will vary from
ABOUT sixteen feet at high tide 10 about
thirty-two teet at low tide. depending on
the stage OF water in Lake Washington.
IhiS lock Will take all commercial deep
sea ships that will ever come 10 Puget
sound. and all sailing ships accompanied
Dy tug. 1t will accommodate vessels of
sixteen feet draft at dead low water and,
as the tide rises, vessels of draft up TO
thirty-sK feet and over will be able to
enter or leave the lock. Provisions will
be made for building larger lock when
ever the necessity shall arise. The dis
lance from the lake to the Sound, includ-
ing the lock. will be about two miles,
and ship can readily count on passing
through the lock and canal in from one
to two hours. depending on its size, a
greater rate OF speed being allowed for
small vessels than for larger ones. 1t
must be remembered that the canal into
the lake really oegips at the east water
way and the canal waterway, both being
integral parts of 1t. the total distance
from deep water In Elliott bay to deep
water in Lake Washington being &C, 7S5
feet.
Before the location was finally decided
upon, borings were made In Beacon hall,
and it was found TO consist of glacier
drift, generall1in horizontal layers or in-
clining toward the Sound. and OF char
acter not likely to slide IL cut at q
proper slope. In order to make Tie banks
of the deep cuts still more secure, ii may
be decided to infect liquid cement into
the earth and thus transform the face
into concrete. The slopes in the cuts will
be to /. and 1t may be found sufficient
in order TO prevent sliding, TO clear off
the land in the vicinity and provide easy
drainage facilities so that the water fall
ing on the ground will not seep into the
earth to any considerable extent It is a
very important feature OF this work that
the hill strata are all inclined TO the
Sound in the direction OF the canal.
Many other means will be taken for the
protection of the slopes, which can only
be determined upon when the excavation
is made and the character Of the material
and Its situation with regard to other
strata has been accurately determined.
The excavation of the hill section prob
ably will be made by the hydraulic pro-
cess; that is, water will be conveyed to
the site of he work in pipes under a
great pressure. II will then be turned
against the earth by means OF hydraulic
giants. which are simply large nozzles so
arranged as to be governed and regu-
lated readily. The material VIII he WASH
ed by these nozZles into numes, wnich
will convey the sem'-liquid mass out up
on the tide fiazs to the place where 1t is
TO be distributed.
the east and west waterways will be con-
nected with the Duwamish river, VIII
furnish a deep, straight, naVigaole cnan-
nel into the river, and VIII accommodate
the smaller craft running 10 the rae
tories fast growing up on It's banks. Ihey
will also tend to carry of mueh more
rapidIv than at presau the flood waters
n. white and Green rivers. which trans
form the Duwamish valley into great
lake every fail and spring. At the same
time the lake canal will redue the per-
manent level OF Lake Washington 70 sie
summer level thereby turning eeoar
river into the lake, TO be dlscHai gu -
the canal and relieving the BACK anu
Duwamish rivers OF its food waters.
,rho ,,ast amount of material to be
token ~ OF the several waterways VII
he used IN making solid ground OF Loo
acras of tide flats directly ADJOINING the
h,slpass center of the city. which are
NV practically useless and nave oeeh
used hitherto principally as oGinp'hs
ground for offal and saWhli ieluSe'
yvf+bo,,t such an allied enterprise as me
- .a,a1 E. g. nrobahle that II would
-. bean many wears before the hillhs
AZ the tide lands would have become \
h,,ss-ess feasibility. but the lead or the
csrsl the existence OF a convehie..t ioute
for II and the vast amount Oh a. ~ ~
excavated in digging II. FURNISH -, al ~. re
ma fariai needed close a. no.
80 enternrises dovetau together perieci
i,- THE hats are 10 be allied 10 ever
.yro fee+ above high tide line Win a
e1tgbt grade toward the water 1or -ns
convenience OF drainage, sewer re anu
~ extension OF the water syst@Hi
TIE form Of bulkheai ga -
,,-.-,,,,,ssslnner Of public lands 20 % con-
st-,,~ts.s along the inner haroor iihe, We
cas-. and west waterways, the Du"si' I tsh
v-s.erwav and the canal waterway. : ~
t,rsf,, new. having only been ADOPTED De
fore IN the dredging OF Olympia harh'or'
re Advantages claimed for X are cheap
rees strength and permanently as y =
t,,,,er-iors 10 the teredo ana IS pro-
rcunced by engineers TO be the besS pro-
lection 20 the banks possible next %
seaWalt. -.
The arst step is 10 drive TWO or three
lines OF piles twelve feet apart. ana Win
intervals OF SIX feet between the piIes ia
.gch line. the penetration ranging rom
afreen 10 tvventy-seven feet, accofdihs 90
the nature Of the ground Wnere the
hulkheaf crosses a channel IN the mats or
Is 20 be built on ground not bare al low
tide. a attress Of brush IS built 70 a ieFei
OF about one foot above low ude brush
fasc.nes txerty-four feet hong ana fr"fA
nine TO twelve inches N diameter VIII then
be piled with butts out on top OF the
mattress to height Of aoo-S ta1ss .SS-'