The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-06
PROPOSALS FOR DREDGE-BoATs.
Ar DEpARTMENr,
BUREAU CORPS ToPoGRApHIcAL ENe,nrrps

| Wan DEpARrmEsr
BUREAU CORPS ToPoGR pHIcAL ENerNprps
/ December 8, 1852
| proposals will be received until and ipclpd
| ing the 10th day of next February, for the
| construction of four steam dredge- boats. to hc
worked by high pressure engines, viz:
One for Lake Champlain, to be delivered in
spected, and received at White Hall Harbor,
Lake Champlain.
One for Lake Ontario, to be delivered, irepec,.
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 30 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 bes I
boiler iron, one quarter of an inch in thickness
TIVE feet long, and forty inches in diameter
The working cylinders of the engine to be
twelve inches diameter inside not less than hal f
an lnch thickness OF metal, and to have 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
we've 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 paid for until after it has
been inspected andtried, and found TO meet the
terms OF contract.
Each boat will be supplied with good four.
Dared yawl- % feet long, and with four good
oars, and also a suitable yawi. boat and oars for
assisting in weighing anchor.
Inc boat Will be inspected in reference to ar
engagements, materials, and equipment and will
be subject to the following trial:
LIST. 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 copsecu-
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 scows, of loose sand 100 cubic
YARDS the hour; OF loose mixture of clay and
sand part sand and parts clay, not less than
ioo cubic yards the hour; of pure clay, 80 cubic
yards the hour; of tenacious clay and of sand and
gravel GO cubic yards the hour, from depth Of
not less than l0 nor exceeding IL feet.
This must be the continued work of the boat
during 10 hours, and not an average during any
shorter tiule of work.
Each boat will have to be supplied with an a :
chors of 200 lbs each; and with an adequate chain
cable of not less than 10 fathoms long, of iron.
Also finch hemp cable 100 fathoms long
The trials will be under pressure of steam for
inch; for locomotion not exceeding $50 pounds the
square inch.
The trials and inspec ton to be made BY q 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 dscharging scows for each dredge. boat, each
scow to be provided with two good sweeps, and
with bottoms 90 arranged as to discharge the whole
load at once. Each boat capable of holding not
lees than 40 tons of excavated soil.
Proposals to be addressed to the undersigned
and marked on the envelope Proposals for
Dredge boat
J. ]. ALERT,
Col Corps Top. Engineers.
The Republic, Intelligencer, 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 a week until
February 10.
Dec 9-d20t& 2awtFeblO