The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-03
PROPOSALS FOR DREDGE-BoArs.
" AR DEPARTMENT.,

4 r,
ooREAu CORPS IoPoGRApHIcAL ENGINEHRs,
! December s, 1852
PROPOSALS will be received until and inolud
| 4 ing the 10th day of next February. for the
construction OF four steam dredge boats, to be
worked by high pressure engines, viz
| One for Lake Champiain. TO be delivered. in
spected, and received at White Hall Harbor, !
Lake Champlain.
ed, and received at Oswego, on Lake Ontario
One for Lake Erie, to be delivered inspected,
and received at Erie, on Lake Erie.
One for Lake Michigan, to be delivered, in
spected, and received at Chicago, Illinois
The hull of each boat to be ITO feet long. 30 feet
beam, with guards feet wide, sufficient for buck
et-ladder and paddle wheels, to draw when
equipped not exceeding feet of waters
10 have two cylindrical boilers, made of the bes
boiler iron, one quarter of an inch in thickness
each.
The working. cylinders of the engine to be
twelve inches diameter inside, not less than half
an inch thickness of metal, and to have a length
OF stroke of four feet, with half stroke cutoff
Each boat to have paddle wheels for locomo-
ton, with suitable accommodation for the officers
and hands required to maneuvre and work the
BOAT, say captain, mate, pilot, engineer, and
twelve bands; also suitably constructed coal
bunkers for about fifty tons of coal.
NO advance will be made on contract nor will
a boat be received paid for until after it has
been inspected and tried, and found to meet the
terms of contract.
Each boat will be supplied with good four
cared yawl- boat, % feet long, and with four good
oars, and also suitable yawl- boat and oars for
assisting in weighing anchor
The boat will be inspected in reference to ar.
rangements, materials, and equipment, and will
be subject to the following trial:
LIST. AS to locomotive power 1t will have to
move not less than 100 miles in calm weather, on
the waters OF each lake respectively, in consecu-
tive hours, at rate of not less than six miles
the hour.
I'd AS to dredging power. 1t will have TO raise
and discharge into scows, of loose sand 100 cubic
yards the hour; of loose mixture of clay and
s nan part SAND and parts clay not less than
loo cubic yards the hour; of pure clay, so cubic
YARDS the hour; OF tenacious clay, and of sand and
gravel, 60 cubic yards the hour, from a depth of
not ~ less than 10 nor exceeding 10 feet.
Ibis must be the continued work of the boat
during l0 hours, and not an average during anv
shorter time of work.
Each boat will have to be supplied with an a,
Choir OF not less than 800 lbs, and too kedge all
chors of 200 lbs. each; and with an adequate chain
cable of not less than 10 fathoms long, of iron,
Also 4z-nch hemp cable 100 fathoms long
The trials will be under pressure of steam for
dredging. not exceeding SO pounds the square
inch; for locomotion not exceeding so pounds the
square inch.
The trials and inspection to be made by Uni
ted States agent
The boats to be ready at the places stated by the
last day of May next.
Proposals will at the same time be received for
four discharging scows for each dredge boat, each
scow TO be provided with two good sweeps, and
with bottoms so arranged as to discharge the whole
load at once Each boat capable of holding not
less than 40 tons of excavated soil.
Proposals to be addressed 10 the undersigned,
and marked on the envelope proposals for
Dredge. boat.''
Sea-. rtaa z ~ .a -. j. ALERT,
.5 szs.f ga -- Col. Corps Top. Engineers.
The Republic, Intelligencer, and Union, Wash.
ington; Courier and Enquirer, and Express, New
York; Commercial Advertiser, Buffalo, N Y;
Advertiser, Detroit, Mich; Commercial Adver-
tiser, Chicago, ILL.,; Commercial Times, Oswego,
N. Y; Pittsburgh Gazette, Pittsburgh, Pa; AL
bany Register. Albany, N. Y, will give the above
twenty daily Insertions then twice week until
February 10.
Dec 9-d20t& 2awtF eblO