Brownsville herald. [volume] (Brownsville, Tex.) 1910-current, 1928-09-07
HARLINCEN
PORT meet

CONTINUED from page seven)
. substantial revetment to resist
them.
Riprap can be placed and replaced
without Nm expensive plant and can
be repaired, Of damage, without the
necessity Of calling a contractor. II
ls very difficult to state in n ease
like that Of an embankment across
the Laguna Madrc just how much
riprap should be used. A covering OF
stone extending to a height Of two
and one-half feet above ordinary
water level will be sufficient to pro-
tect the outer slopes against any ex-
cept storm waves, along the northern
route. IL is probable that a cubic
yard to each three lineal feet will be
sufficient for the depths which will
be found in crossing the Laguna. at
any rate 1t IS recommended that this
amount be first tried IL il should be
decided to riprap the entertainments.
More can be readily added whenever
needed at cost not much greater than
II placed at n time. The stone for
this riprap should all be what is
termed~small stone" in building the
jetty and can be most economically
A8AA4GE4 - q AA0NE&AHk uELLAEh WHICH
can swing 1t by operation in skips
from car on barge to place Of deposit.
Portion Common to Both Routes
Dredged channel from junction Of
routes to Arroyo Colorado.
This portion extends westerly for
u distance OF almost one mile and
then northwest 20 the Arroyo Colo
RADIO meeting il about a mile north
- - -mrMA 49, 49, -. 49,
turn abruptly northward, that point
being six miles from the turn in the
channel or seven miles from the
junction. About half OF the latter
distance proceeding from the east is
through land &C water level or a little
lower, the western end being through
land gradually rising from water
level 70 an elevation Of five feet at
the Arroyo. None Of the land through
which the channl passes is under
cultivation and the deposit Of the
dredged material should not be any
detriment 70 its use or adversely af-
feet its value. The eastern portion Of
the channel, even where in ground
below water level, will be in such
shallow water and be 50 protected by
island that riprap for the embank-
ments will hardly be needed. The ma
terial removed from the channel
should be deposited at least 800 feet
back from the top Of the cut on each
side as on the island and in the La
gura.
The Arroyo Colorado
In this portion Of the channel the
work Is entirely dredging along that
lire which will give the required
waterway at the least cost. IL would
be difficult for the larger vessels
which would use . channel 10 feet
deep to pass around a bend which
has a sharper bend than one with q
radius Of curvature Of 1000 feet. This
has been taken as the limiting de-
gree Of sharpness. Several points
exist where even with this curvature,
il has been necessary 10 run outside
Of the present banks Of the Arroyo
10 obtain a practicable route.
Camseway Across the Laguna
IL has been suggested that the
entertainments thrown up IN dredging
the channel across the Laguna Madre
AN be utilized as either a single Of
4 double causeway for the passage
OF vehicles.
The material removed from the
channel will make two embellishments
f5 feet high and about ~ feet vide
With side slopes Of one-third. II the
embankments were IA feet high, the
tnn width would be about 80 feet.
III the height were is feet. the width
would b as feet. II would therefore
seem preferable to limit the height to
about Is feet and to place the road
wnv On n side only OF the
channel. The difference Of height
w two feet would make but little diff
ference IN the exposure 10 wash from
Term v and this difference
would probably be balanced by the