Northern tribune. [volume] (Cheboygan, Mich.) 1875-1885, 1876-01-15
SPECIFICATIONS
OF the Manner of Improving the Naviga.
ton of Indian River, Burt Lake,
Crooked River and Crooked M
Lake.
GENERAL DESCRIPTION.


The work commences on Indian River
at point shown upon the plan, a few
hundred feet below the mouth of Stur-
geon River. and consists of dredging a
channel fifty feet in width to depth of
five and half feet from the stage of wa
in November. 1875; securing the piling
which are already driven at the entrance
of Burt Lake, by binding timbers, bolts,
&C.; constructing an embankment of
gravel on the outside of the piling, and
Of rip rap, Or loose stone on the inside.
and furnishing and driving seven clusters
of fender piles.
The work upon Crooked River consists
Of Strengthening certain bends and dredg
| ing channel about thirty feet in width
and five feet in depth, from the stage Of
water in November, 1875, into Crooked
Lake; constructing about 800 lineal feet
of sheet piling into the lake; construct
ing brush foundation for receiving the
excavations from the channel, and clear
| ing the river of distractions.
|
FIRST SPECIFICATION.
Dredging in Indian River.-The chan
mel in Indian River from the starting
point below the Sturgeon to be dredged
out to make not less than five and half
feet below the surface of the water as
found by the engineer, w. B. Simpson,
i'm Novem Der, 1875, and to be determined
from benches established by him. The
channel to be not less than fifty feet wide
at the bottom, the cuttings to have per-
pendicular sides. they being left to form
natural slopes. One cut of the dredge may
be deposited upon the banks, and on the
outside of the piling now in place on the
south side Of the river mouth. The re-
mainder of the cut to be deposited on the
banks. or taken out in scows and dumped
in deep water in the lake. When it shall
be deposited on the banks it must be
placed back beyond high water mark. or
wall Of logs and brush built, sufficient.
in the opinicu ofthe Local Commissioner,
| to keep the excavation from sliding back
| into the channel. Where it is not con-
venient i'm taking out the first cut to de-
posit it upon the banks or OH the outside
of the piling, as between the river mouth
and the angle in the south iI.ic of piii;:ng.
a founJa,.;nn or retaining wall of brush
or brush and logs may be built iii
such manner as the Local Commissioner
may direct, and the material dredged
placed upon it. \ BERNIE OF at least five
feet must be LETT between the top of the
cut aud the piling. The dredging be-
tween the rows of piling must not be
done until after the gravel backing and
rip rap work for securing the piles is in
place.
SECOND SPECIFICATION.
Dreding Crooked Ria'sr.-The channel
to be dredged out to make not less than
five feet of water. to be determined in
the same manner aS described i'm the first
specification, the channel to be of such "a
width as shall be directed by the Local
Commissioner, not exceeding thirty feet
at the bottom, with perpendicular sides.
allowing them to take a natural slope.
The work on section two consists OF cut
ting off points to widen the river at the
bends and in cutting off bcnds. rs shown
on the maps and profile. The material
dredged out must be placed far enough,
back upon the bank 10 prevent it sliding
into the channel, or permanently.
secured by wall OF logs and brush, as
may be directed by the Local Commis-
siO1er.
On section three, through what is
known as Grass Lake, the material dredg-
ed must be placed back five feet from the
cutting upon brush foundation herein-
after described.
On section four the material dredged
to be placed upon the banks In accord
ance with the specifications for section
two. Where the cutting extends into
Crooked Lake, the material to be pla ed
upon the outside of sheet piling specified
elsewhere to be built for that purpose.
THIRD SPECIFICATION.
Securing the Puing.-The piles already
driven at the entrance of Burt
Lake are to be sawed off evenly
and OH line three feet above the water.
The heads Of the piles to be secured and
drawn into line by binding timbers not
less than twenty-five feet in length, of
cool sound pine Sxl2 inches if sawed
and 9xl2 inches if hewn, to be halved
and bolted on in the manner shown i'm
figures l, 2 and 3. If hewn timber be
used of the size above specified, it shall
only be paid for as SKIP. In case that
any of the piles are more than II inches
i'm diameter they must be dressed to that
size, SO that the binding timber will fit
closely to all the piles. The bolts used
in boiling the timbers on to be three feet
long between head and thread, and one
inch in diameter of the form shown i'm
figure 4, having cast washer under head
and nut. The head and washer shall be
counter sunk i'm the timbers next the
channel. The whole length of bolt to be
3 feet inches.
The rows of piling to be secured by a
rip rap filling against the inner Or chan
mel side, at such points and of such
form and dimensions, as shall be directed
by the Local Commissioner, and the OUT