Delaware gazette and state journal. (Wilmington, Del.) 1883-1902, 1902-06-26
DELAWARE DREDGING
CONTRACT AWARDED

For dredging tho Delaware River at
the Dan Baker Shoal, near Reedy
Island, and constructing retaining
bank for dredged material, the con
tract was awarded yesterday to the
American Dredging Co. of Philadel-
phia. The bid of that company, S90, 600,
was SIG, 500 lower than tho next lowest |
bidder. For defraying the expenses OF |
the work, which is to be begun under |
the terms of the contract in 20 days
the unexrended balance of an appropra-
tion by the Federal government for
dredging the Delaware is to be drawn
upon. There are LOCO, 600 yards of
excavations to be done, u retaining
bank Of rs, COO cubic yards to be CON
struoted and |, 600 tons of riprap fur
nished and placed. The companies in
The competition and the bids in detail
are as follows:
American Dredging Co., Philadel-
phia, 8. 4 cents per cubic yard for ex-
cayating; 40 cents per cuuic yard for
retaining bank; 50 per ton for riprap;
total, $685. 600.
Maryland Dredging and Constructing
! Go, Baltimore. 10 cents per cubic yard
| for excayatIng; 40 cents per cubic yard
| for retaining bank 81. 80 FER ton for
riprap, total, sl12, 600.
River and Harhor Improvement Co.,
Philadelphia, II cents per cubic yard
/, for excavating; 80 cents per cubic yard
for retaining bank; - per ton for rip
rap; total, s13i, 800.
Morris Il Cummings Dredging Co.,
New York, 10 cents per cubic yard for
excavating; % cents per cubic yard for
retaining wall; 81 per ton for riprap;
total, Sl51, 25O.
The shoal to be dredged is located
about n miles below Philadelphia.
The work to be done is the widening
of tho existing channel through the
upper part of the Dan Baker Shoal to
width of 600 feet by dredging to a
depth of 30 feet at mean low water over
a length of about 20,500 feet; the
removal of any shoals in tho existing
channel on which there is a less depth
than 30 feet; tho widening of the
channel at the beni as may be re-
, CURED; the deposit of the excavated
material as directed, and the con
struction, by depositing material from
, scows or barges, Of n retaining bank.
Prof. Lewis M. Haupt has written to
Capt. Cosby, who is now in charge OF
! the deep channel project, advising the
] use of reaction dikes for training the
channel both at Dan Baker Shoal,
a where tho artificial island has beer
i built, and near Stony Point. Prof.
a Haupt is president of the Reaction
Jetty Co., and the detached training
!, wall is his invention. lie thinks tina
> it would furnish IL solution of the Dela
: ware problem. He realizes, he says
= that there is no legal authority u
!; modify the proposed plan, and he there
q fore submits no quantities nor prices
4 only making tho general recommends
ton.
He calls attention to the ''seriou
, CONSEQUENCES that may result from tn
I? completion of the insnlar obstruction
= below Reedy Island. He believes tina
the timber bulkhead of the island vii
not stand, and that it is only CUES
1t ton of time when it will be destroyed
unless supplemented by heavy ripra
4. to resist Ice and waves. This, he says
must reach to and above high water
prevent erosion. Then, too, he say!
- the depth of the basin is too restricte
al to make il available for dumping with
out rehandling, and, if rehandling
10 necessary, it would cost no more
es place the material on shore.
Prof. Haupt says that his trainir
he walls would entrain the ebb and tioc
". currents in the same path. They shou
be placed at the concave edge OF Il
IN channel to be created, so as to contr
u directly the current movements an
modify the form of the cross sectit
H. without diminishing it's area.
he Cant. Cosby seemed inclined not
n regard the communication as being
any way official. He declined TO gi
u it out, and it was obtained fro
~ another source.