Morning herald., 1839-08-15

duct, archcd complete, 1881 ect, running mea-
sure, or ahout III miles and two-ihirds.
%. SIZE IFaH-'ihe ieag,h of side wall ready to
receive the brick facing and arches amounts to
IL, ,535 feet.
Sd. Caiperts-There are 9 culverts now complete
and in leading off the of the several streams
at which they are the conduits Their length in the
aggregate is 62l0 feet
4th Tunneis.-The number Of tunnels excavated
through their whole length is five, and in the aggre
gate, 1877 feet long. There are in progress OF
completion, besides the above, six tunnels. which
have been excavated in the aggregate, max
ing the aggregate Of tunneng, up to the 23th June
last, 0O6 feet, and of masonry in the tunnels, lIO7
feet.
5th. FounSatioa and Protection Wais-The
foundation wall Iad is 81 $50 cubic yards, and pro-
lection wall, 7,270, making total of l66,25O cubic
yards.
9th Esntilators and waste Weirs.-These neccs-
sary and ornamental structures will be placed at
equal distances alouoth whole line. Six of them
are now complete, and seven in progress. They are
built Of marble, light colored stone, from II to
20 feet in height, rising up in the form Of pyramid
and may answer to point out to strangers the line Of
the aqueduct, as well as vents through which the
collected air may discharge itself
There is. in addition TO the above, vast amount
Of labor which cannot be well described except by
tending this port to inconve enient length-such
the rock and earth excavation, the stone quarried
and dressed the vast embankments thrown up IN the
numerous valleys and ravines over which the aque-
duct has to pass, with the necessary hnery and
tools prepared for carry ing on the operations.
Some important and expensive structures, how
ever which are not included in the sketch given
above, ought not to be omitted, although the descrip
ton must be very brief Take, for example the
following:
lst. An archway over a street, in the village Of
Sing Sing of 20 feet span, and IA feet in height.
I'd. The aqueduct bridge over the Sing Sing Kill,a
considerable run Of water possessing several mil
privileges The arch Of this bridge is 50 feet span,
and about 20 feet in height from the bed of the creek
The centres for turning this large arch have been
for time past and thirty courses of the arch
stoae laid, The aqueduct proceeds from the Sing
Sing Tunnel, crossing both the aforesaid street and
creek from north to south
Sd An archwayov the Highland turn pike, now
high way, about eleven miles below the Croton dam
Of ~ feet span, and IL feet in height
4th. The large culvert on Mill River, requiring
arch Of p feet and l7O feet in length sitsaied
about thirteen miles below the Crotop dam. The
depression OF the valley through which this stream
passes is 72 feet below grade and the height Of the
foundation wall, including the aqueduet, reaches 10
81 feet above the bed Of the river
5th. very expensive archway, forming a car
rage way under the aqueduct, at JEWELS Brook
about seventeen miles from the Croton dam, of Ia
feet span, and Io5 feet in length. The foundation
wall this place is 80 fee; in height to grade, and
62 feet 10 the top filling Of the aqueduct.
9th. An aqueduct bridge over the railroad at Har-
veys marble quarry, Of l6 feet span, and 10 feet in
height
7th An archway over the road at Saw Mill River,
Of IS feet span, and 1 feet in height
Sth The large double culvert on Saw Mill River,
with arches of p feet span each, and - feet IN
length The river is AZ feet below grade, and to tAe
top of the aqueduct So feet The two last structures
are connected the aqueduct passing over both of
them IN its course to the city.
The choice Of materials, the form oi the aquo'
duet and other appondages connected with the struc-
ture, submitted by the act Of the legislature, to
the opinion and views of the Commissioners In hx-
ing pom the plan Of the aqueduc has been TAX
en-, by proper calculations, TO make IT Of sufficient
capaaity 10 convey, when required the whole pro-
duct Of the river or quantity sufficient to give an
ample supply Tor populatsn oi one million of inlia-
I IaraV uIun a. nrEp n
nence solioity, and durability in the work, means
have been adopted TO have the materials Of the best
and most lasting kind selected BY competent Judges,
AID tested by the most improved methods IN use.
The foundation of the aqucduct is stone, upon
which is laid a bed of concrete composed ol broken
granite aud hydraulic cement; the side walls are Of
hammered stone, laid up with cement; the hoor Is
composed of an inverted arch of hard brick, eight
inches thick; the lining of the side walls, and the
upper roof arch, Of the same thickness and ma
terials, all laid with hy ydranlic lime mortar. No
common mortar is permitted in the whole structure
The culverts and bridges are OF dressed stone, OF
great strength aBd suitable dimensions; all aid with
hydraulic cement, which undergoes the usual tests
before il is passed by the engineer.
Here il a respectable amount ot work. considering
the time in which IL Is bees performed. Its execu
ton has not only given general sasfation as TO ITS
permanency and durability, through the mechanical
operations Of combing the various materials into a
whole, but also that the practicabilty of completing
the undertaking in manner and style that wIii DC
ornament to our country and OF the highest cre-
ditto the public spirit Ot the lily =" NeW ioIh anu
its corporate representatives, from whom the pro-
ject cn,anat.d and has received uniiorm support ~
now beyond doubt.
/ A very small number of our citizens comparative
ly, have any idea ofthe magnitude ol the work aud
it, progress: the immense amount oil mere manual
labor which has and 10 to be performed, IN eNcava-
ting and tunncliing through almost an impenetrsbie
rock or Of me hanical labor in preparing Materials
and in the erection of the bridges, culvcrts stose
and foundation walls with the aqueduct Tor convey
ing the water to the city, aud ether erections oi
permanent and durable character; 20 attempt de-
scrption Of which by words, Is out Of the question
they must be seen to be properly understood.
II And in order To be precise, and TO give all our
readers an opportunity Of faviHg guide TO the
course Of the Croton Aqueduct Manhatten Island,
We here detail most precisely the course pursues
after crossing Harlem river. IL commences on the
New York side OF the river, at the eitiucnt pipe
chamber, on land belonging. or lately belonging 10
the estate OF stephen Jurnel where tunnel oi ZOO
feet is contemplated. IL then takes Southerly
course, crossing the land Of MIR "A atkins then
runs westerly on the land Of Carman and Connor,
aud enters the 10th avenue AZ l5lst street, where
tunae averaging 70 feet below the surface. must be
made from 10th to both street inc clusivc The line
then continues in the 10Th avenue to iO7th street.
and makes curve casterly TO 10th street and FROM
thence runs parallel with. and l2s feet from the
nothetly line e the 9th avenue 10 Goth street where
another curve occurs, carrying the line a. S5th
street where IL enters the receiving reservoir
From this reservoir Il Is proposed to conduct The