The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1900-07-23

Cedar river water will be In the res
ervolrs and circulating throughout Sc
attic on Thanksgiving day. and l thlnx
] make safe prediction when / say
that on Christmas Seattle will have one
of the biggest demonstrations on record
Thus spoke City Engineer Thomson as,
accompanied by a representative OF the
post-Inteligencer. thorough inspection
OF Seatties new reservoir system was
completed.
From a present capacity OF 5000, 90 gall
Ions Of Lake Washington water, this new
system Will Jump TO 5.0o0.oOo gallons
daily OF pure sparkling water. coming
twenty-seyen and one-half miles. from
the headworks on Cedar river. When
completed the service will be divided
into three zones. The low service. or
that portion OF the city lying between
sea level and 225 feet above, will be sup
Piled through two reservoirs; the Beacon
hill. to be enlarged. and the "a. 100000 gal
Ion reservoir in Nagle's addition. All
that portion of the city lying between
225 and $50 feet above sen level Will be
supplied direct from the high service or
city park reservoir. while the standpipe
on Queen Anne hill will attend to the
higher quarters OF Seattle.
While the construction of the reservoirs
has been pushed rapidly. there Is no naw,
the city engineer says, In the work. A
service Of high order, II IL said, will be
Seatties good fortune, and plentiful
supply OF water. without faint or other
impurities. will be her reward for long
and patient waiting.
At the Headworks.
The elevation of the water level. in the
settling basin Mt the Cedar river head
works, will be 535 feet above datum. The
overflow level OF the high service Getty
park) reservoir will be 42o feet. giving a
total fall OF III feet In the conduit line.
The concrete abutments and wing walls
are completed and Cedar river Will be
turned through an artificial chanpel this
week. leaving the present bad hire for
construction OF diverting weir or dam.
This diverting dam is Us feet long on
its crest. 80 feet wide on base and win
hs anchored TO concrete foundation walls
extending ten feet below the present bed
of tho river. The base of the dam II
also a solid mass of concrete. and the
supcrstructure will be framed of sawed
timber, flied with rock and sheeted on
the sides and top with heavy matched
planking
An apron 10 feet in length. laid on a
concrete base. extends down stream be-
low the weir" with n cribwurk across
the lower end TO form water cushion
and 10 preclude any possibility Of the
dam being undermined. All tho struc-
lures above water are OF solid concrete.
which. 4 has been demonstrated. is more
The excavation for the settling basin
IL 2ax63 feet and has been completed. The
work OF placing It's concrete walls Will
be commenced this week. The primary
object OF this basin II for the location
OF the screens through which all water
entering the Cedar river conduit must
pass. Tho finest mesh screen used will
have openings one-sixteenth OF an inch
square 10 prevent even tho smallest fish
from getting into tho conduit These
screens arc arranged I'm pairs SO that
any set may BIO removed for cleaning
without leaving an open passage.
When II IL desired to clean tho hasiu,
T sns, IN ma, ,Ssv pipe are SO ar
which will discharge the full capacity OF
Cedar river conduit. and the water OF
the settling basin may he drawn of and
the basin cleaned without Interfering
with the now OF the conduit In the
slightest degree. The settling basin will
be inclosed In q substantial building,
sSx1ac feet.
Manner of Flow.
From the settling basin the water ia
conducted 20 the city OF Seattle by wooden
stave and riv~ted steel pipe, the steel
pipe being used In all deprcssions where
Is laid IN three different sections, known
a. the Rentoa. Dunlap and city sections
and the three taken together covers e 100
linear feet and ia all placed riveted and
tested, The staVe pipe covers ltS,eo lin
ear feet and Tor convenience 10 divided
into niue sections. making twelve sections
In all. including the steel pipe. The latter
are known as Nos. Z, and IL. and the
wooden pipe constitutes the balance
cnt date about.
sSsaxttap -,