The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-10
PROPOSALS FOR DREpGE-BoaTs.
" AR DRpARrmrSr

| War DEPARrmENr
BUREAU CoRPs TopoeRA pHIcAL ENetnrrpe Isl
| December s, 1852.
| PROPOSALS will be received until and incI,d
a ing the 10th day of next February, for the
construction of four steam dredge- boats. to he
worked by high pressure engines, viz:
1 One Tor Lake Champlain, to be delivered in
| spected, and received at White Hall Harbor, on
Lake Champlain. go
One for Lake Ontario, to be delivered, INSPECT
cd, and received at 0swego, on Lake Ontario.
One for Lake Erie, to be delivered jpspected
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, 80 feet
oeam, with guards feet wide, sufficient for buck
et-ladder and paddle wheels, to draw when
equipped not exceeding 8 feet of water
10 have two cylindrical boilers, made of the best
boiler IRON, one quarter of inch in thickness,
twenty two feet lone and FORTY incbesin d;n1oet1
EACH
The working cylinders of the engine to be
twelve inches diameter inside, not less than half
an lnch thickness of metal, and to have length
OF stroke OF four feet, with half stroke cutoff
Each boat to have paddle wheels for locomo-
ton, with suitable accommodation for the officers
and hands required to maneuvre and work the
ooat, say captain, mate, pilot, engineer, and
twelve hands; also suitably constructed coal
bunkers for about fifty tons of coal. a
NO advance will be made on contract, nor will
boat be received or paid for until after it has
oeen inspected and tried, and found to meet the
terms of contract.
Each boat will be supplied with 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: 49,
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 consecus
tive hours, at rate of not less than six mile
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; ola loose mixture of clay and
sand, part sand and parts clay, not less than
100 cubic yards the hour; of pure clay, so cubic
yards the hour; of tenacious clay and of sand and
gravel, 60 cubic yards the hour, from a depth of
not i, less than 10 nor exceeding IL 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 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 70 fathoms long, of iron.
Also A. -inch hemp cable 100 fathoms long.
The trials will be under pressure of steam for
dredging not exceeding 90 pounds the square
inch; for iocomotion not exceeding $50 pounds the
square inch. El
The trials and inspection to be made by 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 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.'
E J.J. ALBERT,
Col. Corps Top. Engineers
The Republic, lntelligencer, and Union, Wash
a. \ N -.