The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-07-14

strength, or the BEST adapIeq Shape, diiv
built in the most substantial and thorough
manner. OF properly prepared foundations
with the necessary effluent pipes, gate
houses, with gate-chambers and vaults,
gates, valves, screens. and all other app
pliances and appurtefances proper Tor the
purpose intended. with the necessary
slope walls, by-Wash. waste-weirss blow
offs, drains and waste pipes, and they
hall be provided with such sufficient
space or area of land along the foot and
as may be necessary to protect. the
In case there should not exist a pubic
road, or roads leading TO and permitting
access to the reservoirs, where loealeql;
necessary lands and right of way shall
be acquired and furnished to give such
CONDUIT CAPACITY.
The carrying capacity of all riveted steel
conduits win be determined by the kut-
ter formula, taking the co-efficient y to
equal .0l6 (sixteen-thousandthsl. The
smallest interior diameter Of the shell as
constructed shall be considered to be the
diameter of the pipe.
The carrying capacity Of all masonry
.eonduits or tunnels vii be determines by p
N to equal OLA fourteen thousandths) Tor
brick work, concrete or ashlar masonry
lining, and .o1s eighteen thousandths9 Ter =
or colduits shall be capable of DELIVERING
the full supply called for when discharg-
ing with a free upper surface the Water
surface not to be higher than one 1901
below the top of the arch
The head to he used for computing the
capacity of the conduits shall be the dll-
ference between the low water level, Or
the bottom elevation of the available
capacity of the reservoir or reservoirs az
the points of intake. and the height or
elevation of delivery at the points OF de-
livery designated in these specifications
RIGHT OF WAY.
The right of way for nduits n IN
no case be less than forty feet in width,
shall be sufficient to enable the City
in case of purchase fully to protect the
iii or pipes laid therein, and to MAINTAIN
and repair the anne. The right OF way
shall extend from the reservoir or reser-
voirs at the point or points of intake f,
the points of delivery. Each conduit shall
be constructed on one and the same side
thereof throughout. and so as not to oc-
cupy more thereof thar is necessary.
Where the City furnishes right of way
over lands which it now owns, the con-
duits shall be laid on that part thereof
designated by the Engineer.
LAYING OF CONDUITS.
The conduits shall be laid in the best
and most thorough manner on true grade
lines Gu q bed or foundation properly pre-
pared. and where necessary to procure
ss1ieh foi11ldatiom on bling. The curvature
of the pipe shall in no case be sharper
than ten degrees. Cast iron pipe with
flexible joints or other devices accept
able to the Engineer may be used az
stream crossings. If steel pipe is used
where the stream exceeds % feet in width.
it must have a thickness o~ne-quarter OF
an inch greater than that required for the
same pressure elsewhere.
Where pipes are laid in excavation, the
ton of the pipe shall be covered by at
least three feet of earth, and the pipes
shall be so placed as to bring all the
longitudinal seams on the upper quarter
of the circumference.
Where the pipe is to be laid across rock,
swamp or meadow it may be above the
surface of the ground. but must be COW
cred with satisfactory earth, sand or
gravel. so that it shall everywhere have
at least three feet of such covering. In
all such cases. and on all entertainments
the contractor must sow grass SEED, CT
sod, OF otherwise protect said embar.k-
s5ruet.ons must be made to secure re
proper drainage of the adjoining land.
CONNECTIONS.
If two steel pipes are laid they are
to be connected at proper points ana IN
such manner that any section of either
shut off or emptied in order TO be
cleaned. inspected and repaired without
Interfering with the flow of water in any
oe the other sections. If but one pipe is
laid. proper provisions must be MADE
far such connections with a second pipe.
81 THAI said connections can be made
Without interfering with the flow of water
in the first pipe. Such a connection shatl
be made or provided for Immediately be-
low any intake dams, also on the river
bank nearest the intake at each point OF
cross tng of the Passaic and Hackensack
rivers. On the opposite bank at slieh
crossings a single gate must be placed en-
each ccrduit. .Othe like connections
mus also be made or provided for, so that
there shall nowhere be d stretch exceed
ing five miles in length without such con-
nectlcns or provision for such a connee-
ton.
Gates or stop valves are to be furnished
and so placed as to divide each pipe INFO
approximately one and one-half mile sec
tons. and preferably are to be located on
SUBMITS. All gates are to be iron-bodied,
bronze-mounted double gates, tested TO
800 pounds pressure per square inch, and
are to be united to the pipe lines By
Ranged joints. All such gates or stop
valves and all other fittings used on the
cunduits shall be equally capable with the
conduit adjacent thereto TO resist any
pressures or strains to which they may
be subjected.
All the composition metal used, except
ing the valve stem, shall be composed of
eighty-hve per cent. copper, ten per cent.
tin arc five per cent. Spelter, and snail
have q tensile strength of not less than
q 900 pounds per square inch. with lve per
cent. e~longation in eight diameters and
FIVE per cent. reduction of area at break
ing point. The valve guides must be
straight and smooth. All face joints
must be plain true and smooth, so as TO
make perfectly watertight joints. with a
very hin layer of pure lead cement. Valve
stems shall be made of Demonstrating
a tensile strength of not less than 10000
pounds per square inch, and the screw
threads thereon shall be cut accurately
to work true and smooth throughout ehe
entire lift of the valve. On the upstream
SIDE of each main stop valve a blowout
shall be placed and interlocked with TIE
step valve by proper device. so that the
blow-Cff must be open before the main
valve can be closed.
AIR VALVES.
Every summit ON the pipe line shall re
provided with an air valve of the most
approyed pattern and of a size properly
prorortioned to the duty it has to per-
form and shall be provided with a step
valve bolted to a Hanged casting or fors-
ing riveted upon the top of the piEe.
Similar air valves shall also be placed
on each side of every gate. They shall
be properly eneased and protected from
possibility of damage from frost or mis-
chief. but so arranged as to be readily
accessible for inspection or testing.
BLOW-OFFS.
In all depressions blow-offs shall he
located for emptying the pipe. They shall
be provided with two S-inch valves boltei
together and to a Hanged casting or forg-
ing rS eted upon the pipe Particular
care must be taken to have the foundation
for both pipe and blow-off secure from
risk OF UNEQUAL settlement. An iron Pipe
shall be provided to carry the water from
the blow-off to a natural Water-course or
ditch.
The plates used in the construction of
the conduits shall in no case be less than
~one-quarter of an inch in Thickness, ana
the working strain due to the static head
of water to which they will be SUBJECTED
shall, under no circumstances, exceed
nine thousand pounds per square inch
section.
The steel for the plates Of the conduit