Morning herald. [volume] (New York [N.Y.]) 1837-1840, 1839-08-17

top lip, seven feet averaging absst forty feet IN
thickness. The down strean sesrss wih s,oPe one
and quarter to one and the up stream will De car
ried PLAN. The abutnsnts twelve feet th,cx; me
tsp and down stream Siege to be covered Win neavy
coping, well clamped together with IRON ancnors and
straps, &c. In fact, the whole strscture - ~ Dc
mass Of substantial stsne masonry, compmeu to&c-
Their with hydraulic cement, and, when completed,
will be one Of the most stupendous erectlons .ne
kind to be found in any part OF this Or any otner
country.
The next important work in order is the Aqueduct
Bridge across the valley of Sing Sing Kill This re-
quires an arch Of eighty feet span ana twen'y-h's
feet rse resting abutments oil stone ana
is intended ia be werk Of great strength ana soh
div In addition to these, there are several large
culverts to be built for crossing the streams ana
brooks running through this section OF the WORKS;
pretty lofty entertainments to De made ana iour
tunnels, oil from 300 to 500 ieet In lengtn through
hills Of more or less altitude.
The most prominent work on the second DIVISION,
is the crossing Mill River, which must DC effected
either by an Aqueduct Bridge Of heavy stone ma
sonry, or by large culvert and embarrassment, the
latter Of which the Commissioners have preferred
There are also two tunnels in this division OF cons
derable length with number OF small culverfs Tor
crossing the several ravpes and oro1Is on inc .ns
Saw Mill River and Tibbit's Brook occurs, pretty
formidable part OF the work. There are two tunnels
one at Yonkers, for entering the valley OF Saw MIL
River, and the other for entering the valley OF Tab
bits Brock.
The fourth division embraces some highly import
ant works. The most imposing is the crossing Of
Harlem River, either by an aqueduct bridge or by
inverted syphons; next, carrying the aqueduct over
Manhattan Valley; and last, though not least, the
erection OF the receiving and distributing reservoirs
IN this citv.
The Ttco Reservoirs. The receiving reservoir
is bounded by the 9th and 7th avenues, and by 18th
and Soth streets, and it will be proper that said
and streets should be opened, and the grade
made to conform 10th banks 81 the reservoir. The
connecting pipes between the receiving and distribu
tsvU o.r Ilnacs orb 40
9th avenue, and this street and avenue should be
opened and the grade fixed. The distributing
voir at Murray Hill is bounded on the south by 10th
street. the north by AID street, the east by the
9th avenue and the west by land the property Of
the Corporation.
The ground for the receiving reservoir is, in some
parts higher than is desirable, requiring heavy exca-
walton; in other respects, to wit the facility afforded
by low grounds sides, to insert pipes for taking
of the water either for use or waste, highly favora
bic. The ground appears very impervious to water
Some progress has been made In sinking shafts which
indicate the probability that though there is much
rock the great body Of the excavation will be earth
1t is favorable feature, that while rock appears
the surface in several parts the deepest excavation
as ascertained by the shafts, will be principally
earth.
In relation to the construction Of the receiving
servoir it is proposed follows: to divide the
servoir into two parts; the northern section, which
has the great body of excavation to contain blocks
Of ground land the southern section to contain Sblocks
The northern ion designed for 20 feet, and the
southern rs feet water An embankment TO form the
boundary and sustain the water of the reservoir;
which is ts be made impervious by puddle wall,
properly carried up in its centre, and the outside
supported by slope or protection wall. Suitable
walls, archways and well falls contemplated to
sustain the iron pipes, and provide for waste weir
to carry of surplus water; connecting pipes and
stop cocks will be required in order to have COM
plete control Of water at all times.
Estimate for Receivins Reservoir.
GOO cubic yds Of rock excavation at 50 cents
$4,000 earth /" 70 cents $4,000