Edwardsville spectator. [volume] (Edwardsville, Ill.) 1819-1826, 1825-02-01
ILLINOIS AND MICHIGAN CA
NAL,

Report of the Engineers Concluded.
scrittion oflocks and moies.
1t has already been observed that from
Cache island 10 the mouth of the Little
Vermillion, there is descent Of 1874 it.
8 H.; that from the ford of,he river Des
PLANES, TO the same point, there is de-
seem OF 1863 #. 8 in. A; that from the ford
TO the head of the Chicago river, there is
descent of III IT, 8 in, z; that from the
head OF the Chicago river 10 the Little
VerTilion, there is descent of l57 f.
II IN. Z; aud from the head Of the Chi
cage river 10 Cache island, descent Of
#. in. T: hence, by the first route we
have an ascent ofl6s it. 8 in. q, and a
descent Of II #. in. Z, giving an aggre-
gas u $50 {. Z 10. Now observing
the small inclination ei the planes OF
ascent and descent, and reileclihg OF the
general uniformity and equability Of the
surface ofthe country, it issupposed the
intermediate locks may be located al ve,y
nearly equal distances from each other,
in consequence oil which the maximum
inclination of the bottom of the Canal
should not, on any account, exceed one
inch in mile. Assuming this maximum
l72 IT. 6 in. of lockage, exclusive of the
entering lock at the Lake, should that be
eventually desired, and such guard locks
as may be necessary. From these re-
sulls it follows, that on this route there
must be
% locks of #. 10 in. l lift each--and proba-
bly, IL guard locks, ~
These guard locks will be located as
follows: one on each side of the con-
temp!aed dam at the ford !; two at the
supposed feeder from the Lake of the
point Aux Chenes; two at the proposed
feeding canal at the river Du Page ; two
at tina, of the river Aux Stables, and, say
three small ones, at the spring brooks
whose waters may be required to feed
the Canal between the ford and the Du
Page; and if i, should be found necessa-
ry, two others at feeding canal from
Fox river; however, it is believed that
these will never be required.
By the second route we have an ascent
from the Little Vermilion to Cache
island Of l54 #. 8 in. and from the point
P to the bead OF the Chicago descent
OF III II. 8 in; giving an aggregate of
l65 #. 6 in. Then assuming the same
inclination for the bottom of the Canal,
as in the former case, there will resul,
in ascent and descent ISL #. in. of lock-
age, giving as.follows:
90 locks Of #. 10 in. 4-and probably guard
locks.
These guard locks will be located as
follows one at the river Des PLANES at
p; two at the supposed feeder at the
lake of the point Aux Chenes; one on
the north side of the reservoir at Cache
island, and from this to the lower end of
che route the same guard locks as men,
eioned from the Du Page to Fox river,
inclusive.
By the third route, we have at Cache
Island an ascent Of l54 #. 8 in. and from
S, to the head of the Chicago, descent
OF lf.ft. giving an aggregate Of los f..
8 in. Then assuming, as before, for the
inclination to be given to the Bottom of
the canal, we shall have in ascent and
descent ls7 #. in. Of lockage, and con-
sequently
30 locks of z #. 10in lift each-and proba-
badly guard locks.
In this route the guard locks from
Cache island to Fox river, inclusive, will
be the same as in the former cases; but
fpr the upper part Of the route we shall