The republic. [volume] (Washington [D.C.]) 1849-1853, 1852-12-28
PROPOSALS. FOR DREDGE-BoATs.
~WAR DEPARrMsNT,
Bbssxv Confs ToPoG IA rHIcAL EsGINEERs,

WAa DEPARrmsNr.
Bsssxv CONS TopoGaAPHicAL EssisEEas, y
December b, 1852. p
PROPOSALS. viii be received until and includ-
L ing the 10th day Of next February, for the
constr ton of four steam dredse-b boats, to be
worked by high pressure engines. WIS.
One for Lake Champlain. 70 b. 7, 5s e IN
One ior 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
spcoted, and received at Chicago, Nlinois. 80
The hull of each buat 10 be 10 feet long, 30 Ieet
beam, with guards 2 feet wide, sufficient for buck
et-ladder and paddle wheels, TO draw when
equipped not exceeding 3 feet Of water.
To have two cylindrical boilers, made Of the best
boiler iron, one quarter Of an inch in thickness,
MY two feet long and forty inches in diameter
each. 49, - .&.6s%.F.-..
The working cylinders Of the engine TO- be
an inch thickness Of metal, and to have a length
of stroke of four feet, with half stroke cuts off
Each boat to have paddle wheels for locomo-
ton, with suitable accommodation for the officers
and hands required to manicure and work the
boat. say captain, mate, pilot, engineer, and
twelve bands; also suitably constructed coal
bunkers for about fifty tons Of coal.
No advance will be made on a contract, nor will
a boat be received paid for until after it has
been inspected and tried, and found to meet the
terms of contract s
Each boat will be supplied with good four,
cared yawl. boat 20 feet long, and with four good
oars, ana Also a suitable yawi boat and oars for
assisting in weighing anchor.
The boat will be inspected in reference to ar.
raneements, materials, and equipment, and Will
be subject to the following trial: I'm
let. As to locomotive power. will have 70
move not less than 100 miles in calm weather. on
the waters Of each lake respectively, in corsecu-
tive hours, At rate OF not less than SIX mhes
the hour. 49,
I'd. AZ to dredging power. It will have 10 raise
and discharge into scows, Of loose sand, l2O cubic
yards the hour; of a loose mixture Of clay and
sand, part sand and parts clay. not less than
100 cubic yards the hour; Of pure clay, 30 cubic
yards the hour; Of tenacious clay, and of sand and
gravel, 60 cubic yards the hour Z, from dep'n Of
not less than 10 nor exceeding IL feet.
This must he the continued work OF the boat
during 10 hours, and not an average during any
shorter time of work. "
Choir of not Less than 500 lbs, and too kedge an
chors of 200 lbs. each; and with an adequate chain
cable Of not less than TO hthoms long, OF ] iron.
Also a ii inch hemp cable 100 fathoms long.
The trials will be under a pressure OF steam Tor
dredging not exceeding 90 pounds the square
inch; for Iocomotion not exceeding $50 pounds the
square inch.
The boats 10 pc ready at the places stated by the
last day of May next.
Proposals will at the same time be received for
four dischar ing seows for each dredge boat, each
scow to be provided with two good swecps, and
with bottoms arranged as to discharga the whole
load at once. Each boat capable Of holding not
less than 40 tons Of cxcavated soil .i,...
. Proposals to be addressed TO the undersigned,
and marked on the envelope Proposals. Tor
j. J. ALERT, vi.
Col. Corps Top. Engineers, -
The Republic, Intelligencer, and Union. Wash
ington; Courier ard Enquirer, and Express, New
York; Commercial Advertiser, Buffalo, n. r.;
Advertiser, Detroit, Mich; Commercial Adver-
tiser, Chicago, Ill; Commercial Times, 0swego,
Ny; Pittsburgh Gazette. Pittsborgh, Pa; Al
bany Register, Albany, N: r., VIII give the above