The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-28
Y: FRIDAY MORNING, JANUARY %, 1853.
Wan DEPARrMEHr,
BUREAU CoRps ToPodRAPHIcAL ENerNEERs,
its ls-ss necernhor q 1870

war OEPARrMENT, eaef
BUREAU CoRps ToPodRAPHIcAL ENerNEHRs,
December 8. 1852.
PROPOSALS will be received until and inciud-
ing the 10th day Of next February, for the
construction Of four steam dfedge- boats, to be
worked BY high pressure engines, viz:
oae lor lake Gns%plsi1 t g be delivered in
Lake Champlafn. 7tst.
One for Lake Ontario, to be delivered, inspect-
ed and received At Dswego, on Lake Ontario.
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.
To have two cylindrical boilers, made of the bes
boiler IRON, one quarter of an inch in thickness,
twenty-five feet long. and forty inches in 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 p half-stroke cutoff.
Each boat to have paddle wheels for locomo.
ton, with suitable accommodation for the officers
and hands required to manBuvre 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
q boat be received or paid for until after it has
been inspected and tried, and found to meet the
terms of contract. }s 5sl 81 49, 80
Each boat will be supplied with a good four
Dared 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:
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 CONSCIOUS
I'VE hours, at rate OF not less than six mile
I'd. As to dredging power. It will have to raise
and discharge into scows, of loose sand 1870 cubic
yards the hour; of loose mixture Of clay and
sand san 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 a depth of
not less than 10 nor exceeding 10 feet.
Ibis must be the continued work of the boat
during 10 hours, and not an average during any
shorter time of work y eatS
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 iocomotion not exceeding $50 pounds the
The trials and inspection to be made by Uni
ted States agent fSnststtas @
The boats to be ready at the places stated by the
last day of May next.
WIA ot tAtc 6dtIle time De received IOr
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, 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
February 10.
Dec Q-dO0t 30 u,f Eah