Iron County register. [volume] (Ironton, Iron County, Mo.) 1867-1965, 1880-03-18
WASHINGTON, D. O.. March

wAsHxeroS, p: g., March NJ =
The ssgcss " the n esSoaais ao s
S Ss m e sss performed its dgsis.
under the act Of June %. 1879. TO mature plans
70. the Of sne river 70 Is 20
to previous ssisntific isbors. and work nov
Of the commiss don the Board discuss various
systems of Improvements. They are not pre-
pared TO submits full and detailed report,
eral system of river improvements. Tho gen.
eral principle kept I'm view has been the plan
p wnsn tne S Saseas Of the river. a.
the principal agent in securing the needed
Improvements I'm navigation The famous OUT.
not Of contrscsicn," Is eSspiinedS ina con :.
.demned. The Mississippi River n not con.
sidered ~ possessing phenomena dihcrens
alIuviai deposits. It's waters carry large guam:
titles OF eedimentary matter. This sediment
tine. es o e IN
less constant Suspension In the water. while .
portion is rolled or swept along ON the bottom.
when, ON any given reach of the same stream.
Velocity. usually measured by meters OF
sSs shs ss aS ana
power of the stream, Is also Increased. IL q
held that, II the normal volume of silt bear
ing stream; M; flowing in an slluvial bed Of iis
an increased velocity. and consequently an
erosion and cross section, and an uiti,.,nfc
ly, II the normal now be decreased in volume.
there win ensue decrease of velocity OF silt.
transporting power and mean sectional area.
The Cowdon plan II recised. and condemned
In all its parts. -, f,et II f--I-'-.-
that they do exert a direct action in deepcn,
ing the channel and enlnrgfng the bed OF the
river during the periods OF rise when they
cause the water to rise to q higher level than
II dispersed. During the period when the
levees were in their most perfect condition.
from 1850 to 1855. the channel Of tho river was
better for purposes of navigation than &c has
been since. 1t is argued that the immediate
effect of the lcvccs would be 20 increase the
volume and accelerate the velocity Of
deepening Of the river-bed; ana that clos
ure of the crevasscs might be expected To- ac-
ccieratc the removal Of the shoals which have
been produced by them, and n their closure
be accompanied by a contraction of the chan.
mel; cause lowering of the surface. slope TO
such an extent rs Will render the maintenance
of 1evees above Red River as an aid to nayi.
CATION practically needless. The repairs and
ready existing will hasten the work OF chanel.
improvements and promote and facilitate
commerce.
The Commission propose TO work TO scour
out and maintain n channel through shoals
and bars existing In portions Of the river
where the width Is excessive. and build up
new banks and develop new shore lines, 20
as to establish the requisite conditions of q
uniform velocity for all stages of the river.
Cairo by constructing n low. water camel.
way to n uniform width of 5000 feet, for the
purpose OF securing out a channel through
shoals and bars. 1t Is thought that this plan
will secure channel of ten feet
mt the extreme low stage of tho
river, over all bars below Cairo. The
Commission favor the general rule
that the channel should be fixed in its pres.
ent location. and that no attempt be made Co
straighten the river or shorten by
ut-ofs. The works of channel construction
and bank protection recommended during
the fiscal year, and confined TO tho length Of
200 miles, embrace New Madrid, Plum Point,
Memphis, Helena, Choctaw Bend, and Lake
Providence The estimates for this year arc
Sll3,000 for closing gaps in lcvees 81 600 600,
and checking the enlargement of the Atchafa.
laya outlet $4,000. ]