The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-01-10

removal Of mud or swamp soil containing de.
composing vegetable matter may be required
II any artificial lakes or ponds where the
water surface has been extended by the Hood
ing of adjoining lands, shall he used as reser,
yoirs. they shall first be drawn down ana
their beds properly prepared, In accoraahce
with these specifications. before being put in
service, II the Engineer shall so direct; -,
There shall be a c.ear space around the
water-ilne Of the reservoirs. and nor less rndn
where i may be needed, which IS 70 pc m
GUIDED In the conveyance of the reservoir Sue
enforced for the entire water-line IN case Lshe
Hopatcong or Greenwood Lake are onercd az
reservoirs, provided that the bidder speciies y
in his bid what portions of the MARGINS OF
those lakes he wishes excepted thereironl, ana
provided further that he succeeds IN prevens-
ing harmful pollution of the water by a proper
exercise of the powers herein placed at ms
disposal. or by other means; ex
The depth of reservoirs shall in all cases eN,
coed eight feet below the full water ievei
throughout seyenty-five per cent. or the en-
tire area of the reservoir.
sonry or earth entertainments as may pc pest
suited to the different localities. They shall
be or sufficient height and strength, OF the
best adapted shape. and built in the mos.
substantial and thorough manner, on properly
prepared foundations, with the necessary er-
fluent pipes, gatehouses, with gate-charnpers
and vaults, gates, valves, screens, and Al
other appliances and appurtenances proper for
the purpose intended, with the necessary
slope walls, by-wash, waste-welrs, blow,offs,
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 pc 1encea
where required. In case there should not eA-
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-
Quits will be determined by the kutter tor or
mula taking tho an-afiaiapf NJ 10 equal .UlO
Sixteen thousandths). The smallest interior
diameter of the shell as constructed snail De
considered to be the diameter Of the pipe.
The carrying capacity of all masonry con,
Quits or tunnels will be determined by the
kutter formula, taking the cosetnceent y Mick 10
work. concrete or ashlar masonry lining. ana
obs eighteen thousandths) for rubble lining.
All such masonry tunnels or condults snail pc
capable of delivering the full supply called Tor
when discharging with a free upper surface,
the water surface not to be higher than 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
walton of the available capacity of the reser,
voir or reservoirs at the points Of intake, ana
points OF delivery designated in these speeln-
cations.
The right of way for eonduits 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
reservoir or reservoirs at the point Or points
of intake to the points OF delivery. Each CON
duit shall be constructed on one and the same
side thereof throughout, and so as not TO
occupy more thereof than is necessary. Where
the City furnishes right Of way oyer ianq s
which it now owns, the conduits shall pc laid
on that part thereof designated py me hhsi-
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 snaai m n no
pipe. with flexible joints or other devices ac-
ceptable to the Engineer, may be used at
the stream exceeds % feet in width, it must
have a thickness one-quarter of an inch great
err 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. ii may be above the sur
face of the ground, but must be covered VIII
satisfactory earth, sand or gravel, so tnat y
shall everywhere have at least three feet OF
such covering. In all such cases, ana on an
entertainments, the contractor must SOW grass
seed, or sod, or otherwise protect said en-
bankments. Necessary culverts and other 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 and in such
manner that any section of either pipe be,
tween such connections may be shut of and
emptied in order to be cleaned, inspected and
repaired without interfering with the How OF
water in any of the other sections. Where
but one pipe is laid, under Plans 3 or Q,
proper provisions must be made for sueh 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 Sueh a
connection shall be made or provided for I'M
mediately below any intake dams, also on the
.;.-a, hnyly N q rocr the intakp at each DOlnT OF
crossing of the Passaic and HackensacR XIV
ers. On the opposite bank at such crossings
a single gate must be placed on each CONDUIT.
other like connections must also be made or
provided for, so that there shall nowhere De
a stretch exceeding five miles in length with
out such connections or provision for sueh d
connection.
Gates or stop valves are to be furnished and
SO placed as to divide each pipe INTO approx
| mately enc and one-half mile sections, anu
preferably are to be located on SUBMITS. All
gates are to be iron-bodied. br-onze-mounted,
double gates, tested to 300 pounds pressure per
square inch, and are to be united to the pipe
lines by Hanged joints. All such gates OF
stop valves and all other fittings used on the
conduits shall be equally capable With the
conduit adjacent thereto to resist any pres
sures or strains to which they may be sup
jected.
All the, composition metal used, exeeptins
the valve stem, shall be composed Of eighty,
five per cent. copper, ten per cent. tin, ana
five per cent. spelter, and shall. have a tensile
strength of not less than 22,oUo pounds pei
square inch, with five per cent. elonsatlon IN
eight diameters and five per cent. reduction
of area at breaking point. The waive guldes
must be straight and smooth, All race JOINTS
must be plain, true and smooth, so as to make
perfectly watertight joints, with a very thin
layer Of pure lead cement. Valve stems shat
be made of bronze, having a tensile strength
of not less than 1900 pounds per square inch,
/ and the screw threads thereon shall be cut
accurately 10. work true and smooth through
| out the entire lift of the valve. On the up
stream side of each main stop valve a blow
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 ap-
| 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 q
TOP Of the pipe. Similar air valves shall also
| he placed on each side of every gate. They
| shall be properly incased and protected from
| possibility of damage from frost or mischief,
but so arranged as to be readily accessible Tor
inspection or testing.
BLow-oFFs. 3
In all depressions nlow-offs shall be located
| for emptying the pipe. They shall be pro-
| vided with two S-inch valves bolted together
| and to a Hanged casting or forging riveted
unon 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.
STEEL PIPE.
The plates used in the construction OF the
conduits shall in no case be less than one
| quarter of an inch in thickness. and the work
which they will be subjected shall, under nc
| circumstances, exceed nine thousand pounds pei
square inch section.
The steel for the plates of the conduit shall
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