The republic. [volume] (Washington [D.C.]) 1849-1853, 1853-01-26

PROPOSALS FOR DREDGE-BoArs.
WAR DEPARTMENT., sE.fg &
BUREAU CoRps TYPOGRAPHICAL ENGINEkRs,

| WAR DEPARTMENT., sI.fE
BUREAU CORPS TYPOGRAPHICAL ENGINEERs,
! A December s, 1852.
| PROPOSALS will be received until and includ
ing the 10th day of next February, for tn
construction of four steam dredgeboat to b
worked BY high pressure engines, viz: - si8
one Tor Lake Champiain. to be delivered, in
| spected, and received at White Hall Harbor, OF
Lake Champlain. 9tssp a8 qids8aas
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. e 'al
One for Lake Michigan, to be delivered, in
apected, and received at Chicago, Illinois.
The hull of each boat to be 10 feet long, 80 fee
beam, with guards feet wide. sufficient for buck
et-iadder and paddle wheels, to draw whel
equipped not exceeding feet of water. dts9ai
Tofave two cylindrical boilers, made of the bes
boiler iron, one quarter of an inch in thickness
twenty two feet long, and forty inches in diameter
each. 3 "a 555I FIT 50
The working cylinders of the engine to b,
twelve inches diameter inside, not less than hal
an inch thickness of metal, and to have q len 9Th
OF stroke of four feet, with half stroke cutoff
Each boat to have paddle. wheels for iocomo
ton, with suitable accommodation for the officer
and hands required to maneuvre and work tn,
boat, say captain, mate, pilot, engineer ane
twelve hands; also suitably constructed coal
bunkers for about fifty tons of coal. ssjasi
No advance will be made on contract, nor will
boat be received or paid for until after it hai
been inspected and tried, and found to meet the
terms of contract. rs ~ II
Each boat will be supplied with good four
Dared yawl- boat, 20 feet long, and with four gooo
oars, and also suitable yawl- boat and oars fol
assisting in weighing anchor. 8,age
The boat will be inspected in reference to ar.
rangements, materials, and equipment, and will
be subject to the following trial: 19a -
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 CONSCIOUS
tive hours, at a rate of not less than six mile
the hour. 7S1'T1 =
Cd. As to dredging power. It will have to raise
and discharge into scows, of loose sand, 100 cubic
yards the hour; of a loose mixture of clay and
5 san part sand and parts clay. not less than
lOO 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 10 nor exceeding - feet. @
This must be the continued work of the boat
during 10 hours, and not an average during any
shorter time of work. - b9sffnsl0is :
Each boat will have to be supplied with an a, :
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 4s-inch hemp cable 100 fathors long,. sgs
The trials will be under pressure of steam for
dredging not exceeding so pounds the square
inch; for iocomotion not exceeding $50 pounds the
square inch. isRs @a q t1s0 Us g'.Eta3g - Fl
The trials and inspection to be made by Uni.
ted States agent. - ..szH. ,-.s-.s--.
The boats to be ready at the places stated by the
last day of May next.
Proposals viii 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 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-b 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. ", will give the above
twenty daily insertions, then twice week until
February TO-
Dec 9-d20t & 2awtF eblO