The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-31

PROPOSALS FOR. DREDaE-BoATs.
War DEPARrMENT.
BUREAU CoRPs TopoaRApHIcAL EnGINEERs,

War DEPARrMEnr.
BuREAU CoHPs TopoaRApHIcAI Ena1rEERs,
December 8, 1852.
PROPOSALS will be received until and includ-
construction Of four steam dredge-boat to be
worked by high pressure engines, viz:
One for Lake Champlain. to be delivered, in
spected, and received at White Hall Harbor, on
Lake Champlain.
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 10 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.
10 have two cylindrical boilers, made of the best
boiler iron, one quarter of an inch in thickness,
twenty two feet long, and forty inchesin diameter
The working cylinders of the engine to be
twelve inches diameter inside, not less than hal
an inch thickness of metal and to have 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 manduvre 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 a 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. s3s4ss.s s.
Each boat will be supplied with good four
cared yawl-boat, % feet long, and with four good
oars, and also suitable yawl4boat 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:
lst. 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 conscious
tive hours, at q rate Of not less than six mile
the hour.
I'd. AS to dredging power. It will have to raise
and discharge into scows of loose sand, 100 cubic
yards the hour; of a loose mixture of clay and
sand, part sand and 2 parts clay, not less than
100 cubic yards the hour; of pure clay, 80 cubic
yards the hour; of tenacious clay, and of sand and
gravel, SO cubic yards the hour. from depth of
not +, less than 10 nor exceeding u 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 800 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 A. 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.
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 to the undersigned,
and marked on the envelope Proposals for
lDredge boat.''
I ]. ]. ALERT,
Col. Corps Top. Engineers.
The Republic, Inteligencer, 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,
X; 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& 2awtFeb10