The republic. [volume] (Washington [D.C.]) 1849-1853, 1852-12-14
PROPOSALS FOR DREDGE-BOATs.
War DEPARTMENT,

War DEpARTmEST,
BUREAU CoRPs TYPOGRAPHICAL ESGIsEERs,
... December 3, 1852.
PROPOSALS will be received until and includ
i 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, to 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 10 feet long. 80 feet
et-ladder and paddle wheels, to draw when
equipped not exceeding 3 feet Of water.
Tohave two cylindrical boilers, made of the best
boiler iron, one quarter of an inrh in thickness,
twenty-five feet long. and forty inches in diameter
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 length
of stroke of four feet, with a hall. stroke cut off,
Each boat to have paddle wheels for locomo-
ton, with suitable accommodation for the officers
and hands required to manouvre 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 u contract, nor will
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 a good four
cared yawl boat, % feet long, and with four good
oars, and also a 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. II 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 pcows, of loose sand, l2O 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, 80 cubic
gravel, 60 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
Choir of not less than 500 lbs 4, 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 81 inch hemp cable 100 fathoms long.
The trials will be under pressure Of steam for
dredging not exceeding 80 pounds the square
inch; for locomotion not exceeding l5O pounds the
square inch.
The trials and inspection to be made by Uni
ted States agent.
The boate to be ready at the places stated by the
last day of May next.
Proposals will at the same time be received for
four dischargng scows for each dredge. boakkeacb
scow to be provided with two good Sweeps, and
with bottoms arranged as to d.charge the whole
load at 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"
j. J. ALERT,
Col. Corps Top Engineers.
The Republic, Intelligencer, and Union, Wash
in top; Courier and Enquirer, and Express, New
York; Commercial ADVERTISED, Buffalo, N. Y I;
Advertiser, Detroit, Mich; Commercial Adver-
tiser, Chicago, ILL.,; Commercial Times, Oswego,
~ Y; Pittsburgh Gazette, Pittsburgh, Pa Al,
twenty daily insertions, then twice q week until
February 10.
Dec 9-d20t& 2awtFeblO