The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1891-06-26

- Ss-lH1cA sAfoAc, De Dutlg, provision being
made for . third one 10 be set when the demand
Tor II shall have become apparent IL will be all
that the city should do at present
Twos such machines can pump 100000 gal
ions o. EeteE per day, and three win give o sur
plus OF 2,0o0o0o gallons over that estimated %
Dc essential: this allows ons pump being idle
most Of ne time for repairs But. ~ has been
more than I've see. insa a. "or.hingsos pumPs are
vice outy, and they can be 30 connected st the
pump house that one OF them can, il necessary,
pump into the low service reservoir in case Of
an en,sfgsney. and II the high service reservoir
Is built, reserve Of 10000 gallons can be
kept n store 70 Be used the necessities OF the
case demand.
To sum i al up. the pumping plant when
Two Pinch worthineton duplex
pumps, mainly for high service,
One is-iaeh Dow single pump. ca
Three finch worshington duplex. ca ~
P1N1hy 1y51,you
Total 1s.5oo,ooo
These pumps win be fully adequate 10 furnish
the 100000 gallons daily, estimated 20 be
needed, and with the aid of high service reser-
yoir couid safely be relied upon 10 do more in
An emergency.
A force main % inches In diameter leading
rom the pumping works to the low service
reservoir In addition 70 the old i2-ineh main,
and the l6-inch pipe on Rainier street, which
latter viii be used exclusively for high service,
wlA oe adequate for snch q plant This main
pounds, according 70 pressure, averaging about
lT5 pounds per foot
This plan has an advantage in that this new
A,inch force main win ultimately be needed a.
adistrioution main from the low service reser-
voir for the district on the east and south of the
reservoir.
Greater capacity win be unnecessary in such
main ior distribution purposes and wiz en-
The plsaf q described viii in-oive an expedi-
fufs Tor pumps, boslers, pipes and force mains
sprrcx inAseiy - follows, emitting buildings:
Isr<s 1t .asezs 80 - - ssTs. With inde-
pendent e0nd<nssrs. delivered Il Sc
Pipe connections. foundations and SCI = :
Three Sincn By is-sees boilers. with :
sixty finch tubes each, including
feed pumps. heaters, boiler-room con-
Two independent condensers for old
pumps $40 o.
Inlet pipe and wen as per plan. -. 5000 q
1910 linear feet of 3o-inch cast iron
force main. delivered by rail in place
complete, at S. ................... 5000 O
Total. 1850 O
The above estimation in some of the minor
items Is necessarily incorrect but IL IL believed
that il Is ample TO cover the ground az 3 whole
Mr. Chsiks estimate for one 1000 90 gallon high
duty pump with q 3-inch rfveted force main
be seen. nothing Is included for boilers, on tht
grounds that owing 70 the economy with which
this pump will work the old boilers will answer
for the old plant and the new. This il certainly
erroneous, one battery of the old boilers will b
needed for the high duty pumps, and the proposed
100000 gallon pump will require double the
capacity Of either of the old batteries 70 prop
erfy provide for part being out of use. At am
rate IL, as have estimated, three new boilers
are needed, costing with feed pumps, etc, s. 400
on the addition OF new pumps such as recon-
mended OF 10000 gallons capacity, then Ger
tainly two such boilers will be needed on ths
addition OF one 100000 gallon pump, even il Il
Ia OF the highest grade This win add 49,
and two independent eondensers for the Old
pumps will add 1910 more. which raises Mr.
Chalk's estimate 70 ssl-SC3, which is sec, IL:
greater than that for the 10000 pumps.
There is difference OF ,0O0 gallons ca
psciy in the two plants IL Ii true, but IL Is also
true that 20 build but one pump of 5000 o0l
gallons capacity will leave the city with nothing
10 the large pump, and that should this ca
pscity be divided among three 1900, 900 gallon
higa duty pumps, as II should Be, they would
instead Of S., 600 900, as estimated.
To concentrate so large part of the pumping
capacity OF the city in one machine would, in
my opinion, be wholly inadmissible. suen &
pumping engine for q head of about 30 feet
would be among the largest IL not the largest
machine of the kind in the United States.
$4,000 gallons each were furnished so as to b
they would COS. not far from SIS,
Ia taken, Q great difference exists in the FRS
cost II is claimed, however, that the differ
ence in first cost will be made up in the greater
economy of operating the high duty plant Thii
would be true If the plant was intended TO con
sinue permanently to supply the city, but al
such Is rot the case, on the assumptions herein
before made, we will endeayor 10 see how
comparison stands between q high duty and I
low duty plant based strictly upon the oper
ating expenses and first cost, leaving out ths
matter of q force main which, with equal pump
ing capacity, could be the same in either case.
In stating the work OF an engine, the unit o.
measurement is the foot pound, and in giyins
its economic working, it is usual TO express il
in the number of foot pounds OF work which
the engine and boilers combined, can perform
with 100 pounds OF coal This latter Is termed
its duty
There is much strife among builders of n.
highest grade of pumping engines 20 excel IL
duty" To this end, in engines OF this class,
limit of duty Is often prescribed in the contract
upon which the acceptance OF the machine il
based. This custom has led 70 systematic test.
of pumping plants, TO determine WHISTLER theJ
I'LL the conditions of the contract under which
they are built The economical working Of IN.
plant a. q whole, being SIS much, and even moIs
dependent upon the performance OF the boilers
as upon the engines proper. II Is OBVIOUSLY un
fair TO hold the engine builder RESPONSIBLE fol
the results OF the boilers unless be furnishes ths
boilers well the engines. IL is very FIRE
quently the case that he does not, and this ha.
properly given rise 70 a system OF measuring
the boilers. This system is perfectly right and
proper. and Is the only true way of COMPARING
Two different machines, but it has
so given rise, in the populsr mind
to many erroneous impressions regarding W lat
is TO be expected from = high duty pumping
pant which is not right ana proper The unit
.he boilers - ten pounds OF water eyapoTated
with one pound OF coal: that is, for every ter
pounds OF steam used By the engine IL Is charged
with enc pound OF coal This unit IS shout the
VI rsarfD-r,a-ca nf sha haz-
boilers, using the highest grade of anthracits
coal, with the mos, careful firing and attention
during the test Under such conditions, and
with the skiilful management of experts, veTy
high duties are obtained by the builders OF the
best grade of pumping engines, and IL thess
duties be taken 50 representing the actual WORK
OF fuel can be shown as possible oy such 8
rlant But these daties frequently &c
rot show the actual workings of the
ana much less its daily workings in actua
service. For instance, one 10000 gallon
pump OF this character, tested by the write,
furnished the boilers as well as the pump, gave
q duty based upon the actual coal consumed oi
~ 5000 foot pounds, while its accredited duty
under the provisions of the contract was los,e.so
90 foot pounds. The result wRs obtained viii
The best quality Of hltuminous coal.
Two engines, each exact duplicates OF the one
above re.erred 70. the boilers being also ths
same, which are working under almost pre-
ciss.y similar conditions in the city OF Chicago
gaze as the actual performance OF the engines
and boilers IN q test conducted by PTo.ess0l
Robert H. Thurston, duty OF l00,70o.o00 fool
pounds, the best quality of anthracite coal beins
used These eng mes ia daily operation during
the two wears. ending January !, 1891. are ON
oaliy reported ss having made an average dut.
OF So $4,000 foot pounds, good grades OF antArA
cite coal being used. Their working duty !.
then just about two-thirdS o. their test duty
Indeed, Il may be accepted a. sppEo1im&isl,
correC. u say that pumps rarely, II ever, give IL
actual use more than two-shirds the duty which
they car be made u show on trial. and freq nsEt