The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-12
PROPOSALS FOR pREpeE-BoATs.
" Ar DEPARTMENT.
% overwhelmingly

A Il
BUREAU CozPs TopoeRAPHIoAL ENeINErRs.
4 IEileasu ga December s, 1852.
i PROPOSALS will be received until and includ
| Il 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 Champlain, 10 be delivered, in
spected, and received at White Hall Harbor, on
Lake Champain.
One for Lake Ontario, to be delivered, inspect.
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 80 feet
BEAM with guards feet wide, sufficient for buck
et-ladder and paddle wheels, to draw when
equipped not exceeding feet of water.
TO have two cylindrical boilers, made OF the bes
boiler iron, one quarter of inch in thickness
each. isssS ,T.I-IC =
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 hands; also suitably constructed coal
bunkers for about fifty tons Of coal.
No advance will be made on contract, nor will
boat be received or paid for until after it has
been inspected and tried, and found TO meet the
terms of contract
IT.
Dared 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
engagements, materials, and equipment, and will
be subject TO the following trial: 'a ....
LIST. As to locomotive power. It will have to
move not less than 100 miles in calm weather, on
the waters of each lake respectively, in CONSCIOUS
tive hours, at rate of not less than six mile
the hour.
I'd. As to dredging power. II will have to raise
and discharge into scows, Of loose sand 100 cubic
yards the hour; OF loose mixture Of CLAY and
sand, part sand and 2 parts clay, not less than
100 cubic yards the hour; of pure clay so cubic
yards the hour of tenacious clay, and of sand and
gravel. on CUBIC yards the hour, from depth Of
not less than 10 nor exceeding IL feet.
This must be the continued work of the boat
during 10 hours, and not an average during any
shorter time of work.
Each boat will have to be supplied with an al =
Choir of not less than 500 lbs and too kedge an
chors of 200 lbs each; and with an adequate chain
cable of not less than 10 fathoms long, of iron.
Also 4z-inch hemp cable 100 fathoms long.
The trials will be under pressure of steam for
dredging not exceeding 60 pounds the square
inch; for locomotion not exceeding $50 pounds the
square inch. rsNatar
The trials and inspection to be made by Uni
The boats to be ready at the places stated by the
last day of May next. ..r.......
Proposals will at the same time be received for
four dschargng scows for each dredge boat, each
scow 10 be provided with two good sweeps and
with bottoms so arranged to discharge the whole
load at once. Each boat capable of holding not
less than 40 tons of excavated soil
Proposals to be addressed TO the undersigned
and marked on the envelope Proposals for
Dredge boat"
]. ]. ALERT,
Col. Corps Top. Engineers
The Republic, Intelligencer, and Union, Wash
ington; Courier and Enquirer, and Express, New
York; Commercial Advertiser, Buffalo, NJ Y;
Advertiser, Detroit, Mich; Commercial Adver-a
tiser CHICAGO. Ill: Commercial Times Osvveco