The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-01-29


service, il the Engineer shall 50 direct.
There shall be j clear SPACE around the
water-ilne of the reservoirs, and not less than
stxty feet in width. and addltional space
Guided IN the conveyance of the reservoir sites
to the City. This requirement will not be
Hopatcong or Greenwood Lake are offered as
reservoirs provided that the bidder specifies
those lakes ~ wjs pSrtl sNsao ass tn thera naeaaas and
provided further thaf he succeeds in prevent
ing harmful pollution of the water by a proper
exercise or the powers herein placed at ms
DISPOSAL, or by other means.
The depth Of reservoirs shall in all cases ex-
ceed eight feet below the full water lever
throughout seventy-ive per cent. OF the en-
tire area of the reservoir.
The reservoir dams may be either of ma
sonry or earth embellishments. as may be best
suited to the different localities. They Shall
be OF sufficient height and strength. of the
substantial and thorough manner, on properly
prepared foundations, with the necessary Ell
ana vaults, gates, valves, screens, ana an
other appliances and appurtenances proper Tor
the s5ana purpose intended, with the necessary
drains and waste pipes, and they shall be
provided With such sufficient space or area of
land along the foot and side as may be nee
essary TO protect the same, and shall be fenced
where required. In case there should not ex-
list a public road or roads leading to and per-
hitting access to the reservoirs, where locat-
ed, necessary lands and right of way shall
be acquired and furnished to give such ac-
cess.
CONDUIT CAPACITY.
The carrying capacity of all riveted steel con-
duits Will be determined by the Kutter for
mula, taking the co-efficient n to equal .ol6
sixteen thoesandths). The smallest interior
diameter of the shell as constructed shall pc
considered to be the diameter of the pipe.
Inc carrying capacity of all masonry con-
duits or tunnels will be determined by the
kutter formula. taking the co-ehicient n to
equal -0l4 fourteen thousandths) for prlck
work, concrete or ashlar masonry lining, ana
.olS t~eighteen thousandths) for rubble lining.
All such masonry tunnels or conduits snail pc
capable of delivering the full supply called for
when discharging with a free upper surface,
me water surface not to be higher tnan one
foot below the top of the arch
The head to be used for computing the ca
pacity Of the conduits shall be the difference
between the low water level. or the bottom ele-
walton of the available capacity of the reser-
voir or reservoirs at the points Of intake, ana
points of delivery designated in these specifi-
cations.
The right of way for conduits shall in no
case be less than forty feet in width, ana
shall be sufficient to enable the City in case
of purchase fully to protect the pipe or pipes
laid therein. and to maintain and repair the
same The right of way shall extend from the
Of lfSf intake to- to- he reser points Of Of d 81 py' Each con-
duit shall be constructed on one and the same
side thereof throughout, and so as not 10
occupy more thereof than is necessary. Where
the City furnishes right of way over lands
which it now owns, the conduits shall be laid
on that part thereof designated by the hngl-
neer.
LAYING OF CONDUITS.
The conduits shall be laid in the best and
most thorough manner on true grade lines on
a bed or foundation properly prepared, ana
where necessary to procure such foundation on
piling. The curvature of the pipe shall in no
case be sharper than ten degrees. Cast iron
pipe. with flexible Joints or other devices ac-
ceptable to the Engineer, may be USED at
stream crossings. If steel pipe is used where
the stream exceeds 25 feet in width, II must
have a thickness one-quarter. of an inch great
er than that required for the same pressure
elsewhere.
Where pipes are laid in excavation, the top
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 sur
face of the ground, but must be covered with
shall everywhere have at least three feet OF
such covering. In all such cases, and on al
embankments, the contractor must sow grass
seed, or sod, or otherwise proteet sala EN-
bankments. Necessary eulyerts and otner con
structions must be made to secure the proper
drainage of the adjoining land.
CONNECTIONS.
Where two steel pipes are laid they are to
be connected at proper points ana IN such
tween such connections may be shut off and
emptied in order to be cleaned, inspected ana
repaired without interfering with the floW OF
water in any of the other sections. Where
but one pipe is laid, under Plans b or Z,
proper provisions must be made for such CON
nections with a second pipe, so that said con-
~nections can be made without interfering with
the flow Of water in the first pipe. Such a
connection shall be made or provided Tor I'M
mediately below any intake dams, also on the
river bank nearest the intake at each point OF
crossing of the Passaic and Hackensack Rly-
ers. on the opposite bank at such crossings
a single gate must be placed on each conduit.
Other like connections must also be mace OF
a stretch exceeding five miles in length with
out such connections or provision for such a
connection.
Gates or stop valves are to be furnished and
so placed as to divide each pipe into approx
mately one and one-half mile sections. and
preferably are to be located on SUBMITS. All
gates are to<be iron-bodied, bro~nze-nounted,
double gates. tested to 800 pounds pressure per
aoupre Gnch and are to be united to the pipe
lines by Hanged joints. All such gates or
stop valves and all other fittings used on the
conduit adjacent thereto to resist any pres
sures or strains to which they may be sub
jected. -
the valve stem, shall be composed of eighty
five per cent. copper, ten per cent. I'm, ana
five per cent. spelter. and shall have a tensile
strer 9Th of not less than $4,000 pounds per
square inch, with five per cent. elongation in
eight diameters and five per cent. reduction
Of area at breaking point. The valve guides
must be straight and smooth. All FACE joints
perfectly watertight joints, with a very thin
layer of pure lead cement. Valve stems snail
be made of bronze, having a tensile strength
of not less than 90 1000 pounds per square inch,
and the screw threads thereon shall be cut
accurately to work true and smooth through
off the entire UIL OIL tleG dlN Ou Tie up
stream side Of each main stop valve a blow
eff shall be placed and interlocked with the
stop valve by proper device, SO that the blow
off must be open before the main valve can
= AIR VALVES.
Every summit on the pipe line shall be
provided with an air valve of the most APP
proved pattern and of a size properly proper
toned to the duty it has to perform. 1t shall
be provided with a stop valve bolted to a
Hanged casting or forging riveted upon the
ION of the pipe. Similar air valves shall also
- -1.oa5 ~ poah eide of every gate T1aV
shall be properly ineased and protected from
possibility of damage from frost or mischief,
but so arranged as TO De feadily accessible Ior
inspection or testing.
BLOW-OFFS.
In all depreSSiOns bloW-ons shall be located
for >emptying the pipe. They shall be pro-
Vida With two S-inch valves boIted together
and to a Hanged casting or forging riveted
l1Don the pipe. Particular care must be taken
to have the foundation for both pipe and blow
An iron pipe shall be provided to carry the
water from the blow-off to a natural water.
course or ditch.
STEEL PIPE.
The mates used in the construction of the
conduits shall in no case be less than one
quarter of an inch in thickness, and the work
ing strain due to the static head of water to
u,7icn they will be subjected shall, under no
eircurnstanees, exceed nine thousand pounds per
sIuare inch section.
The steel for the plates of the conduit shall
made by the basic or acid open hearth pro-
cess. If by the basic open hearth process the
etsc} shall contain not more than three one
b1,ndredths per cent. of phosphorus and four
nneNb,indrdeths per cent. Of sulphur. If by
The acid open hearth process, the steel shall
contain not more than seven and one-half
FOUR oue-hundredths per cent. of sulphur. The
annount of manganese and carbon to be in
s,,cb quantities as shall produce the best re-
s,,ltsa The tensile strength of the steel shall
s4nrao the limits of (52. 000j ffty-two thou-