The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-20
PROPOSALS FOR DnnDen-noArs.
Wan DEPARTMENT,
BUREAU CORPS ToPoeRAPHlcAL ENeIsEras

Wan DEPARTMENT
oohAAu CokPs TYPOGRAPHICAL ENeINERRs
| December s, 1852.
| PROPOSALS will be received until and includ
| i ing the 10th day of next February. for the
construction of four steam dred ge-boats. To bt
WORKED by high pressure engines, viz:
One for Lake Champain. to be delivered, in.
spected, and received at White Hall Harbor, on
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 bull of each boat to be ITO feet long, 80 fee
beam, with guards feet wide, sufficient for buck
et-ladder and paddle. wheels, to draw when
equipped not exceeding feet of water
10 nave two cylindrical boilers made of the best
boiler iron, one quarter of an inch in thickness
twenty-five feet long, and forty inches in diameter
The working cylinders of the engine 10 be
twelve inches diameter inside, not less than hal
an inch thickqess of metal, and to have a length
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
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. Tf
Each boat will be supplied with good four
cared yawl-boat, 2O 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:
lst. 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 mile
the hour.
"a. AS to dredging power 1t will have to raise
and discharge into scows of loose sand 100 cubic
yards the hour; of a loose mixture of clay and
s san part sand and parts clay not less than
yards the hour; OF tenacious clay, and of sand and
gravel, go cubic yards the hour, from depth of
not ~ less than 10 nor exceeding y feet.
This must be the continued work of the boat
during 10 hours, and not an average during apy
shorter time of work
Each boat viii have to be supplied with an al
Choir of not less than 800 lbs, and too Hedge all
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 so pounds the square
inch; for locomotion not exceeding ! so pounds the
square inch.
The trials and inspecto to be made by Uni
ted States agent.
The boats to be ready at the places stated by the
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
Dredge boat"
j. j. ALERT,
Col. Corps Top Engineers.
The Republic, InteIlgencer, and Union, Wash
ington; Courier and Enquirer, and Express, New
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&2awtFeb10