The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1892-02-04
Estimates.

The projects contemplate the construction Of
masonry locks, each provided with an upper
aod lower lock gate aud a guard gate, all con-
strueted OF steel, with all necessary capstans
ana inlet and outlet valves, with hydraulic
engines TO operate them, the power to be sup
ied oy turbine wheels; with dwelling houses
ior keepers; with electric lighting plant for
lighting the lock; with stone revetted waste
weirs. etc.
Iae canal proper in upland cuts is TO have a
bottom width of eighty feet and a surface width
OF laS feet; the channels in salmon bay. Lake
Union and Union bay are TO have bottom widths
OF -oo feet, and the approach from deep water
wide
SMITH COVE RoUrE.-The totsl estimated cost
OF the complete project for the ship canal from
deep water in Duwamish bay, via Smith cove,
tile mead OF Salmon bsy and Lake Union to Lake
washington is S5,4iS, 26i. -; in round numbers,
s5,So00. This cost can be materially reduced
in two ways:
FIRST by building, instead of double track
canal III which ships can pass each other, q
single track canal in the three portions of the
cana excavated in the upiands, namely, from
the outer lock to salmon bay, from Salmon
Day TO Lake Union, and from Lake Union to
Lake Washington. The canal designed, and for
which the estimates are made, is eighty feet
vide on the bottom and los feet at the water line
by reducing the width at the bottom TO fifty
feet and at the water line to lbs feet ample pro
vision would be made for the passage OF ships
from one basin to another aud out TO the
sound, and the additional width can be given
when demanded by the increase OF commerce.
In the same manner the excavated channels
IN Salmon bay, Lake Union and Union bay
could be reduced from 200 feet in bottom width
to loo feet without any immediate disadvan-
tage and the greater width TO be provided for
when ipd Inv tba fNfu
by thus reducing the width of the canal and
basin channels saving in excavation of 10000
cubic yards can be made, equivalent to St00,oo0.
reducing the estimated cost OF the work TO
sS,loa000
second way of reducing the estimated cost
would be by the substitution of composite locks
OF masonry and timber for masonry locks. In
this way saving OF $4,000 could be effected,
srill further reducing the cost to s2,571,0Ia
SHILsHoLE BAY ROUTE The total estimated
cost OF the complete project for the ship canal
from deep water in Puget sound via shilshole
ana Salmon bays and Lake Union to Lake Wash
ington is $500 %, or, in round numbers,
100000
As in the other case, the estimated cost of
s29o0,O0O can be materially reduced two ways.
First, by reducing the upland cuts from bot
tom Width OF eighty feet to bottom width of fifty
feet and the dredged channel through salmon
bay. Lake Union and Union bay from 200 feet to-
$50 feet width at bottom.
This would reduce the amount of excavation
to $4,000 cubic yards, equivalent to sSS500o, and
the total estimated cost TO $2565,010
The second way of reducing the cost would be
by substituting composite locks of masonry and
timberfor masonry locks In this way a saving
OF $4,000 could be effected, reducing the total
estimated cost still further to $2036,000.
The estimates Tor both routes include the
securing of sufficient land for the full width of
the canal.
The following is summary of the estimates.
Smith core route
Double track canal, with masonry
locks sS,500O00
Double track canal, with composite
locks ............' ....-.........-... 1.oO0
Single track canal, with masonry locks 100000
Single track canal, with composite
locks .................-....... 2,571,cOO
ShiishOle bay route
Double track canal, with masonry
tocks-.--.- S,91,uuO
Double track canal, with composite
locks - 2.s7I,oOO
Single track canal. with masonry locks 2,j65,000
Single track canal, with composite
locks. 2.0S6,OoO
The estimated cost of the canal to connect
Lakes Washington and Samamish is si,927, 30.