The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-01-11

composing vegetable matter may be required
by the Engineer.
If any a~rtiheial lakes or ponds where the
water surface has been extended by the flood
ing Of adjoining lands, shall be used as reser,
volrss they shall first be drawn down ana
their beds properly prepared, in accoraance
with these specifications, before being put IN
service, II the Engineer shall so dlrect. Il,
There shall be a clear space around the
water-line Of the reservoirs, and not less than
sixty feet in width, and additionai - space ios
where It may be needed. which is to pc NJ
Guided in the conveyance of the reservoir SUES
TO the CITY. This requirement Will not pc
Hopatcong or Greenwood Lake are offered as
reservoirs, provided that the bidder speclhes
n ms nld what portions Of the marg,hs and I'd
provided further that he succeeds IN prf1ensr
ing harmful pollution of the water by a proper
exercise OF the powers herein placed at MS
disposal, or by other means.
The depth of reservoirs shall in all cases ex,
coed eight feet below the full water level
throughout seventy-fve per cent. Oh the en-
tire area of the reservoir.
The reservoir dams may be either OF ma.
sonry or earth embankments, as may De pes.
suited TO the different localities. They shaii
be or Sufficient height and strength, OF ING
Dess auap,ed shape, ana pun. an a nronepiy
prepared foundations. with the necessary Ell
nuent pipes, gatehouses, with gate-champers
ana vaults, gates. valves, screens, ana an
other appliances and appurtenances proper Tor
the purpose intended, with the necessary
slope walls, by-wash, waste-weirs, blow1ons,
drains and waste pipes, and they snail pc
provided with such sufficient space or area OF
land along the foot and side as may pc nee,
essary to protect the same, and shall be fenceo
where required. In case there should not eA-
list a public road or roads leading to and per-
@ ed, mece seeess i to the a raseT rieht Of wn way 'a 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 for
mula, taking the eo-efficient N to equal .olo
diameter ,1ou ~ nhs2 : non sn shall be
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 co-efficient n to
equal OLA fourteen thousandths) for brick
work, concrete or ashlar masonry lining, and
.O1S eighteen thousandths) for rubble lining.
All such masonry tunnels or conduits shall be
capable of delivering the full supply called 1or
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
between the low water level, or the bottom ele-
walton Of the available capacity OF the reser,
the height or elevation of delivery at the
points of delivery designated in these specih-
cations. ~
RIGHT OF. WAY.
The right of way for c%onduits shall in no
case be less than forty feet in width, and
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. Inc TlR0l Oh way Snail eAtGHu ilolA luS
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 70
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 Engi-
LAYING OF coNDUITs.
The conduits shall be laid in the best and
most thorough manner on true grade INES on
a bed or foundation properly, prepared and
where necessary to procure such foundation on
piiing. The curvature of the pipe shall in no
case be sharper than ten degrees. Cast IRON
pipe, with flexible joints or other devices &C.
ceptable to the Engineer, may be used at
stream crossings. If steel pipe is used where
the stream exceeds 25 feet in width, it must
have a thickness one-quarter of an inch great
er than that required for the same pressure
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 Win
satisfactory earth, sand or gravel, so that II
shall everywhere have at least three Ieet Of
such covering. In all such cases, and on all
entertainments, the contractor must SOW grass
seed, or sod, or otherwise protect said en-
M Necessary culverts and or Ire c0nr
structions must be made to secure the proper
drainage of the adjoining lana.
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 ana
repaired without interfering with the flow of
water in any Of the other sections. Where
but one pipe is .laid, under Plans y or =,
proper provisions must be made for such con-
nections can be made without interfering with
the flow of water in the first pipe. Suen a
connection a,n n shall s ne maze iaqake OF da prosia also 'o on the
river bank nearest the intake at each point OF
crossing of the Passaic and Hackensack hlv-
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 be
q stretch exceeding five miles in length with
out such connections or provision Tor 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. bronze-nounted,
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 or
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 SUD
jected.
the valve stem, shall be composed of eighty
five per cent. copper, ten per cent. tin, and
strength Of not less than 1900 pounds per
square inch, with five per cent. eiongatlon IN
eight diat1eterS ana HVe per cent. reduction
of area at breaking 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 thin
layer of pure lead cement. Valve stems shall
be made Of bronze, having a tensile strength
of not less than 0,00o pounds per square inch,
and the screw threads thereon shall be cut
accurately to work true and smooth through
out the entire lift of the valve. On the up
stream side of each main stop valve a blow
off 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
be closed.
Every summit on the pipe line shall be
provided with an air valve Of the most ap-
TONED to the duty it has to perform. 1t shall
be provided with a stop valve bolted to a
Hanged casting or forging r1veted upon the
TOP Of the pipe. Similar air valves shall also
be placed on each side of every gate. They
shall be properly incased and protected from
possibility of damage. from frost OF mischief,
but so arranged as to be readily accessible for
inspection or testing
BLOW-OFFS.
In all depressions ~blow-offs shall be located
for emptying the pipe. They shall be pro-
vided with two S-inoh valves bolted together
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 shah be provided to carry the
course or ditch.
STEEL PIPE.
The plates used in the construction of the
conduits shall in no case be less than one
ing 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 plateseof the conduit shall
No of the class called soft" and shall be
made by the basic or acid open hearth pro-