The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-02-01
PROPOSALS FOR DREDGE-BoArs.
War DEPARTMENT

i War DEpARTMENr,
BUREAU CORPS TYPOGRAPHICAL ENGINEERs,
/ December s, 1852.
/ proposals will be received until and includ
= ing the 10th day of next February, for the
construction of four steam dredge- boats, to be
4 worked by high-pressure engines, viz:
/ One TOR Lake Champlain, to be delivered, in
spected, and received at White Hall Harbor, on
4 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. IS
The hull of each boat to be 10 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 water.
ohave two cylindrical boilers, made of the best
boiler iron, one quarter of an inch in thickness,
twentyt feet long, and forty inches in diameter
each.
The working cylinders of the engine to be
| twelve inches diameter inside, not less than hal
of stroke of four feet, with half stroke cut off.
Each boat to have paddle wheels for locomo-
ton, with suitable accommodation for the officers
| ana 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
| a boat be received or 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
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 rate of not less than six mile
the hour.
3D.. 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
sand, part sand and parts clay, not less than
lO0 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 IL feet
This must be the continued work of the boat
during lO hours, and not an average during any
shorter time of work
Each boat will have to be supplied with an at
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 4 -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 $50 pounds the
square inch.
The trials and inspection to be made bv 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
iooi SCoWS IOF eaCu OFoQR boat, eaCl
scow to 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.
J. j. ALBERT,
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