The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-31
wAsHINGron MONDAY MORNING JANUARY 81, 1853
WAR DspARrMsNr.

War DspARrMrET,
BUREAU CoRPs ToP0GRAPHicAL ENaINEERs,
Ass s,s 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
worked by high-pressufe engines, viz:
One for Lake ChamplaiH. to be delivered, in
spected, and received at White Hall Harbor, on
Lake Channpiain.
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, i'm
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.
Tohave two cylindrical boilers, made of the besi
boiler iron, one quarter of an inch in thickness,
twenty-five feet long, and forty inchesin diameter
each.
The working cylinders of the engine to be
twelve inches diameter inside. not less than bal
an inch thickness of metal, and to have length
OF stroke of four feet, with haIf.stroke cutoff
Each boat to have paddle wheels for locomo-
ton, with suitable accommodation for the officers
and hands required to manoeuvre and work the
boat. say captain, mate, pilot, engineer, and
twelve hands; also suitably constructed coal
bunkers for about fifty tons Of coal. Z,
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
Each boat will be supplied with good four
Dared yawl boat, 20 feet long, and with four good
oars, and also suitable yawlsboat 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: <s re33
ISL. 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 3 rate Of not less than six mile
the hour go 10 15I3E
! 3D.. 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
sand, part sand and 2 parts clay, not less than
100 cubic yards the hour; of pure clay, 80 cubic
yards the hour; of tenacious clay and Of sand and
gravel, 60 cubic yards the hour, from a depth Of
not less than 10 nor exceeding - feet.
E This must be the continued work of the boat
during 10 hours, and not an average during any
shorter TIME of work. 7s-,g -
Each boat will have to be supplied with an ar
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 a pressure of steam for
dredging not exceeding so pounds the square
inch; for Iocomotion not exceeding $50 pounds the
square inch.
The trials and inspection to be made by Uni
ted States agent. a 81 fss.,S
The boats to be ready at the places stated bv the
last day of May next.
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 80 arranged as to discharge thewhole
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
iDredge- boat"
j. j. ALERT,
Col. Corps Top. Engineers.
The Republic, 1ntelligencer, and Union, Wash
lngton; 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 a week until
February 10.
Dec 9-d2Ot&2awtFe b1O