Richmond enquirer. [volume] (Richmond, Va.) 1815-1867, 1826-09-08

leave one and quarter cents Tor the rent oil the
mine, and yet be sold in the Washington market
at twelve and half cents the bushel, and in that
of Baltimore, Philadelphia, or New York at ,hi.-
ty per cent. less than any coal supplied to
these markets. Messrs. Denny and Craft state,
that seven bushels of heaped coal are computed at
Pittsburg to furnish as much heat, one cord oil
the best hickory wood /; and sixty bushels. which
cost, delivered at the factory, one dollar eighty
cents, give motion, for twelve effectual and thir
teen and quarter actual hours, to rhree thousand
cotton spindles, while the factory is, at the same
time, and by the same fuel, warmed throughout.
1t is left to arithmetical calculation, guided by
knowledge of the arts and OF the uses of such
fuel, cheaply provided, 10 estimate its consump
ton, and the profit which its supply must yield,
upon the canal, the cost of which, it is now con-
fdently believed, between the excavations In the
mountains tina, furnish the coal, aid OF which they
are in great measure composed, and the tide wa
ter of the Potomac, will not exceed four millions
of dollars.
Six and a quarter cents toll are charged upon the
bushe of coal, not because such tariff would bear
fair proportion to IT'S price, but because the com
modify will bear the toll. When the other uses
of the canal shall admit of it, this toll may be redu
ced to two cents the bushel and coal supplied to
the District cheaper terms than l. is now fur
nished from Pttsburg 10 Louisville, viz: at 6 IA
cents the bushel.
Allowing $50 bushels for every family, and
combining the consumption of coal to the inhabi-
tants, whom it would reach, the waters of the
Potomac and the Chesapeake, alone, 1t cannot be
questioned, but that, a, Ia cents the bushel,
would pay income of six per cent. on the cost
Of that part of the canal which conveyed it to the
consumer
a most interesting table of the dimensions OF
the Chesapeake and Ohio Canal, illustrated by
transverse profles of the canal and tunnel, was
ceived from the Engineer Department, and laid
before the committee with the correspondence above.
tits one of the tables which will constitute part
of the report of the Board of Internal Improve
ment, and, with the report itself, may shortly be
expected by the public. From this table we have
made the subjoined extracts, not being provided
with forms for printing The prohes
The Eastern section includes short Interval
between tide water and Georgetown, compre
hended in the charter, and extends from George
town to Cumberland, IS6 miles, with lockage
of 57S feet, distributed among 10 locks 1t is es-
mated at S,l77, 0Sl dollars, on the principle be
fore stated and more fully illustrated by the sub
joined table.
The middle section extending from Cumberland
to the Eastern end of the summit level, il 20 miles
and 24O yards; and thence, with that level, from
the upper lock of the Eastern portion TO the upper
lock of the Western portion, distance OF five
miles and 1880 yards; and, thence, from the WEES
tern end Of the summit level to the mouth OF Cas-
selman's river, a distance of 35 miles and 1850
yards, being, in all, 20 miles and 1910 yards, is
estimated at IO,02S, I22 dollars, embracing lock-
sse of 1925 feet ascent, and 636 descent. OF this
nun, 3,47I ,967 dollars is allowed for the summit
level of miles 1850 yards, embracing the tunnel
of 4 miles 80 yards. The locks, in this section,
are in number TAG
The Western section, beginning where the last
ends, and extending So miles and 220 yards, with
descending lockage Of GIG feet, distributed
among 70 locks, is estimated at 4 ITO ,223 dollars.
The summary, affording distance of 341 miles
and 1880 yards, with ascent OF 1908 feet and
descent of 1855 feet of locksge distributed
among 400 locks, and estimated at 22,37o,42e
dollars.
In this estimate. the locks are computed at
Il, 900 dollars each. The dimensions of the locks
are, in length, 102 feet in width, in the clear, IA
feet, with lift, on an average, of s feet each,
being designed for boats o. feet long and l3 1-2
feet broad.
The breadth of the canal. at the water line, IL
IS feet, at the bottom 33 feet, with depth of 8
feet from the water line. The tow path is nine
feet broad, and added TO the lateral surf-beams,
slopes, guard bank of 5 feet, and parallel drains,
occupy. including the canal, breadth OF lO2 feet,
In level cutting.
The estimate of the tunnel is founded on three
hypothesis LIST. Hard clay; I'd. Slate rock and
sand stone; and, last, granite and unstIaifed lime
stone. The respective amounts being, for the LIST,
ed and, for the last, 8, 1927 $40.
The greatest elevation OF the ridge, above the
water line of the tunnel, Sol feet.
The charter of the Chesapeake and Ohio Canal
contemplated an extension of the Eastern section
along the Potomac, beyond Cumberland 10 the
mouth OF Savage river, and the Table supplied by
the Board of Engineers, gives, for the distance
between Cumberland and the mouth OF Savage,
30 miles and $50 yards; for the ascent 3l2 feet,
which the table distributes amcng SO locks. The
cost of this extension of the canal, having the
same dimensions, and being grounded the same
principles, they compute at ,794 1868 dollars.
The profile of the tunnel exhibits canal, sur
rounded by brick wall, on an elevation from the
water line of 10 1-2 feet, and descent below it
of feet in the clear. The surrounding brick wall
is two feet thick, with projecting tow path from
the side, of the breadth of four feet The great
est breadth Of the tunnel, in the clear, is % feet
the breadth Of the canal, at the water line, de
Quoting the tow path, is Is feet. The tow path
rests foundation OF brick
The estimates ofthe Board Of Internal Improve
ment are so framed, that they can be accommodate
ed to any given price of materials and labor, and,
if reduced according to the terms of the actual
tracts, referred to in the letters of Messrs. Denny
and Craft, and Of Mr.. Stewart, IUOttId bring the
cost Of this great tDork 1oithin The sum Of ten
millions Of dollars. OF this, however, feg
weeks will furnish better evidence, when the en-
tire report of the Board of Internal improvements
will be laid before the public. Nat. Int
The Arkansas Gazette states that Lieut. GRIF-
FIFTH, the superintendent sent into that territory by
the Secretary of War; to let the contracts for ope-
ming the road from Memphis to Little Rock, has