The Cairo bulletin. [volume] (Cairo, Ill.) 1872-1878, 1876-02-23

i,atton, and will probably before spring
he detached, when IL will form second
dangerous obstruction, and IN It's turn
hasten the destruction Of the next of the
series, and thus finally oil will re DE-.
tachcd.
III my Judgment it is very Important
that these dikes be preserved, as they
would serve a. an efficient protection to
the front they cover if themselves pro-
tected from flank attack by works above.
In my report upon part of the third sub
division Of the Mississippi transportation
route" (scc Appendix &C 4, report OF
Chief OF Engineers, 1875, second part,
page 1927 said:
ITO maintain that navigation will re-
qnirc the rcvetnicnt or other protection
OF caving banks. The estimated sum OF
Si,UO,OOO Is intended to cover the cost Of
such works. to preserve the channel at
those points where the necessity Is likely
to occur.
Further examination would BE- neccs-
sary to determine where works OF this
character are most needed. The greater
part, We may safely say, would be re-
CURED between Commerce axd the Ohio. >
The bend now under consideration,
and also the succeeding one on the Mis-.
souri, shore nearer the mouth of the Ohio,
also shown on the map rs the scene Of
very active erosion, were In mind when
that report was prepared as probably the
first localities where protective works OF
serious extept would be required, and, In
my Judgment, the necessity for protec-
tive works at both these localities Is inn
mediate. IN the interest of an improved
navigation because the position, shape.
and depth OF channel, throughout the
part of the river shown OH this map. are
now favorable. AMI could be rendered
permanent with rs little cost rs will ever
be possible iD the future, and conditions
equally favorable may not occur again IL
the work be deferred moreover, delay
will assurcdly result in transforming the
spur-dikes already mentioned from benc-
fetal structures to dangers similar to the
noted Bacon Rock lately removed under
the authority Of congress. after having
caused many disasters to boats.
Passing to the consideration Of the
plans proposed for the protection ofthes e
banks, three several systems
are suggested rs probably cficc-
tive. The first Is suggestion made
by persons living at Cairo, and contein-
plates the construction ola dixie extending
from the Illinois shore, near the upper
limit OF the map, so as to force the chan
mel to the right OF Eliza Towhead. This
Is Objectionable on the ground that it in
wolves a radical change. which cannot be
secured by any single dixie, for the rea-
son that single bikes perpendicular Tor
approximately so) TO the current have no
determinate effect the employment OF
such bikes Is legitimate only In systems,
ana series OF dikes sufficient to insure
the result proposed would be very ex-
p' .a 49,, - a. c secohu pan
%, sbprt snnr.dit al ,hn M series
do tho sa,ne hv n ccn,in,, .mv tmru Is 10
'rba nxnor;o,,,a aainaJ So, ae'e''neht.
Soccer Rend ohnya ~ i''e WIZ AZ
structcd undcr iii of,ice asrnr,,s ov .hr
means of comnar;ng Tho ner;,s ~, ', wy
,w" mo,hoJ" ~ De- S ~, s VI t me.
hoy;n~ been ,os,eJ onf ro,t, III. nou'
noSac,S tIo chn;co ,,a,, rrO, uns euc.
IN ron,i,lera,;on of c4st III con-, ~ S,,
.nd rcna;r So C,r ,s ,J,a ,,or,;or ~ .p'n
hank nhoye tho or,,inorw ,naan VI ene
oS the river ia concermcd Rain,, ' r.
level of tho mean s,,oo Nv ~. ~"
nend.ncc ia ,n he nT.ood we,
INV worL ,yb;c,, i. moi "on,,,, "pU,'
IL SAWYER R"nh ho,,, royo,,,...,. "o gus,
spur-Iike rest unon n heavy ,on"i,"d anu
wall nj rinran fnumJcd 4, y t,a"n,, a,
least oighf tot below lou, ',a,or o NY a.
tenIinv ,ivc and half c..", oh" ou ca
trcme low water or ,,hn,t ~ ,i %o io,..t y,
The mean lou ra,er oi now;ao,.in e . ~, "
Aitho,~h thee works hays. .tonJ so,;s.
r,c,or;iv II would not n. ;,s,i,;o,in %
Innlicate them in the Iioh, IF nressn, ex =.
nerionce Since a che,nsr and nnn.,,,, e .,
iicicnt mode of constr,,ction has ha anS S r.,
,iSoJ anJ nrac,icaI,, ,n.,nh ,.l,;or w.
no anniiad ~ cases :nch ~ ~. "" III, ,' =,
The yIcin;tv of Ca;ro whore ,ho Jn',i' -
Wy. 'o 49,. 1T, uo uvP'h !,