Edwardsville spectator. [volume] (Edwardsville, Ill.) 1819-1826, 1825-01-18

ducting the distace from 2 10 Cache
island from the distance Of earth to be
excavated, we haze for this route,
Excavation in eath, 65 ms. C. 90.
The excayatio in rock, embellishments
and erubbing, b g the same as before.
In this route III ANAL to the head OF the
Chicago and PLANES, may, more
evidently than IN the former case, be led
by the small Lake de la pointe Aux
Chenes.
BY The third route, the distance from
Alto S, Just above the Sagsnashkee,
nus, be excavated, and that part OF The
canal supplied from the river Des
PLANES, and the waters OF the Lake
Saganashkee, in the immediate vicinity,
efthal par of the canal. From this point
to Cache island the bed ii the river will
be followed ms. 80 c. 50. Deducting
this distance from the whole eXtcnI OF
excavation in earth we shall have on this
route,
Excavation in earth, n m. IS Sc.
The excavation in rock cmbankmepts
aud grubbng the same as before. Sup
posing this route to be taken, the same
leo ice, of rock IN the bed Of the river,
mentioned in thr last route, must De re
moved to ensure ready add safe pas
sage for boats a all stages of wafer.
BY The fourthoute, we have The same
extent o' excavation as in the firsl, how
ever, il is probable, that in this, the dig
ging will be esser bu more deep cut
ting than 10 the fist route, cons equenlly,
estimating it the same, we have Tor THIS
route the same r,snis as Tor the first
This route sutposes the water to he
drawn from LAX, Michigan, and al the
head Of The Cache island, where the sur
face water l9vel is #, 8 in. 7, below the
surface water level oil the LAX e, to min
gle with those 10 the reservoir formed
by the dam at this place. On this sup
position the excavation will naturally
form an artificial river between the head
of Cache island and the Lake, which
will alternately flow from and 10 the
Lake, as the waters in The river Des
Planes may he low or high. In tins
route it will De observed that the dig
ging will necessarily pass through the
marsh OF the Saganasbkee, or BRUSH
swamp.
By the fGh and last route, the object
is 10 use the water of Lake Michigan
alone to supnly The canal, IN consequence
it on the south side OF the river ill that
river has acquired sufficient descent
TO enable the canal TO be carried over il
BY an abueduct, which viii be al point
about 8 miles above Cache island. This
aqueduct il is supposed viii be about
500 fee long and about 80 feet high
hence on this route also &c shall have the
same cNCayatr5S.s; ots.l,auk rIs and
grubbing as inthe first, together with The
additional eXpene el the aforesaid aque-
duct. But all tc dams required on he
other routes ma be dispensed with on
this
5th. TIE nun5er and description Of
aqueducts, damsand cutvcyts that quiH
hroba5iy be required.
Whichever Of the above mentioned
routes may be selected hy the commits
sioners, it is supposed that the fina To-
cation OF The canal may be such as u
avoid the greater parI Of The deep rsvines
10 be met with on and in the immediate
vicinity Of the rOute le.el!ed; in conse-
quence of which, and on supposl,ion tina,
he number OF cuiver,s may be taken in
the ratia OF Two 20 each nile, we shall
have, for the first route,
Aqueduct at Fox river, say, scott. long, 80 high
do Aux Stables, 800 do 20 do
do Du Page. $50 do % do
Dam at D On Aux PLANES. 500 do 4 do
AK sables, 100 do 4 do
Du Page, 100 do a do
Culver,s, say, 200
BY the .Sscond route, we shall have the
same aqueducts and the same number
OF dams as above, exceptthe dam across
the river Dss PLANES, ID the place Of
being at the ford, will be at the head OF
Cache island. And the number of cul-
vcrts will be, say, l62.
By the third route, the aqueducts and
d ans will be the same as IN the second
route, but the humber OF culverts will
be, say IA
BY the foaM route, the aqueduc's and
dams will be the same as IN the former
case, but the number OF eulverts will be,
say, l42. This supposss no culvcrts
from Cache island 10 the Chicago.
By the fifth route, in addition to the
aqueducts supposed fer the former
routes, respectively, weshall have one
at the Little Rock on me River Des
PLANES, 500 feet Ion, and so feet