The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1890-02-22

2s4s ~f
sshaEez1 auns eievss<A -.-------.- - -
Ed Of Hwan lake ....s.<-<-...sss-.<-.s-- f@1g
Tnnrsi - Snsn lake .ss-...- .-s-s~.-.--.. 30 80
~ inch rsy< sss.sssss. .--.-.-@-s-ss-.- s-seo
rcs1; .............-...... !. Isz.sss
Or sbass swsaty<esen rifles. which b sp-
pscxinasasy she Alssxnee that water vii have
to fvsserse 10 rearh sAe hiSt-sesysee reservoir
IRON the dam on Cellar sives.
rxnaE xfrrn
Cedar rfwer. from vhsea Il Is proposed 20 take
The uster 60 be snppsses - chs city IA clear
stream runninx oyer = gravel anf bomber kos-
tnns and hasiag ia sspsee ia the sseasie Noun
sAiuss Is a<ss varies fs ~fdss from I'D - lg
fest The distance srons the sste - sEs proso~si
Cara fp sss eafs aasBea with Eissk siTsf. 81 Rem
son. fnEsowgssg lac sssr1stle.uf N. ssrssfn. u
abgsf nineteen rites The total sioDe ct The
rsser 10 khnt cfsfss1ee Is 90 fscs. "a average
os twsnfg six feet tn flsr Ensss.
There are no s~tfisnesfs on the river above
Mspss ys.ies. which H. s.x mics fesov The pro
posed dam
There has heea no opportunity for acsrefai
hYs3grgrasshle survey si TIE river kHs xnch ss
Incidentally in Tire course sf the treasnain
az warx.
FROM The eross ssesioas ~ tie river bed. toe
siore OF sisr stream. ard the height OF water ~
different stssex ~ The river. ! sezimate shsi On
December II. issa. before the snow fyesan 70
melt snd xhesa she river msy he considered ~
Icing nos npueA ssoYs sss Iess-wafer stage. the
aew was lisDk16ue gallons ia twenss-sonr fofsfr.
turing fetfAxry. Hh he fsls sFsaws Taestiae.
one stage saawed t.s0n1 otg gsIIons. AID some
days later. ~ stii assosissf stare OF the river.
probably nesr the high water stare, the esfs-
mstn gises i.sa9ss 800 gallons in swenty -f0ar
houn These estimates are rough. aud sssDasa
oslly be msed 10 insIirass The fret that the
amount al wstes that eaa b. furnished ~ the
river, used ia ccnnsffian With SWAN Lake 80
xtofare reservoir. will i< 4lnsle Tor si possible
demands tbss the city ssn make apon H.
Tho water - clear a. ali ordinary stages. and
no Hsoss diaoiored fhaa other mountain streams
during sftxisess
No analysis has been made " tie water. bsi.
ndxsnx FROM t3a character OF this COUNTRY from
which II comes, II mag te assumed that IL viii
not differ greatiy frosH shat ssosa for the Rock
creek Sstcf
sxAN LAKE.
swsn lake IL n clear deep lake. with gravel
bottom and generally with desp PERCEPTIONS
shores, comparatively free et all vegetable
growth. except that for . short dtssa around
the northwestern part III the lake the shores are
nes 10 steep. aud some bsaiFnxnts grow.
Though having It's outlet into Green river,
many miles south. IL lies Within lets than two
and cne-haf miles Of CESAR river. and within
oAe-thifd Of = mile OF the dly'de between the
two rivers.
Several clearing. have been made ON its
shores, and some hali-inxen cheap houses butt.
oil but Otto or two OF which. however. are above
the proposed level Of the water.
surveys have not been made to determine the
area Of the lake, though. roughly estimated by
the map. IL is shout Gao acres. After bclsg
raised to level OF sss fset above high tide is
ARIA viii probably be about 40 acres. There
viii then be an average Of go acres, with
depth Of II feet. a. . supply that eau be drawn
upon without repleuishing from Cedar river.
This ~ equivalent 10 I'VE mouths supply OF
2s,eoo.o 40 gallons each swenty-iour hours.
There are numerous advantages to he derived
from this use 81 swan lake ~ = reservoir, some
Of which may he briefly stated:
First--lt IL economeai 20 nse IL. The total es-
timafed cost OF all the work from the Cedar
river dam 10 the end 81 the tunnel in section ~.
exclusive Of realty, IL 4 80 60. and the approxi-
mate total distance il % 100 feet This gives an
average Of sks7 per linear foot
The line u fumes and tunnels. ~ designed
end Of the tunnel In section g. 90 GO. 600 gallons
In twenty four hoars. or double The smeust
that 44inch pipe can carry from there 20 the
city. under the conditions which II viii work A
pipe 10 do the work. with total fall Of atty i've
feet between the e esiar river dam and The end
The tuanal, that s2-inch pipc will do from
there 20 the rity. which would have 20 be 6fty.
ing the dam. grubbins. clearing aud grading. ct
least siss oo morc than the line OF fumes aud
tunnel and lake improvements ss proposed.
seeond-The use Of Swan lake eliminates ele-
menss OF hazard 10 the water supply, in that II
practically brings the source nearly twelve
miles nearer 10 the city. aud substitutes lsrge
reservoir that u not subject TO accident, for
small one that IL. There would he ample time
70 vbattt the Cedar river dam entire. without
leaving the city short OF water. should the dam
80 out or need Rebuilding because Of delay
without diminishing the ettys supply OF water.
Third-shouid the city wish 10 Increase the
wafor supply. II will only need to lay another
pipe from the end of the tunnel to the iow.ser-
vice reservoir. USING the pipe Al present proposed
entirely Tor the high service supply. This. in
deed. wanld be the ideal ystem, - IL would not
leave the city dependent upon one pipe. and
would obsisse the necessity 81 alternating the
use III the PIPE hesweea the two services
The ADVANTAGES OF raising the surface of swan
lake are, that 10 gives MA additional head which
viii Increase the discharge into the city reser-
vslrs, particularly into the high service one aud
thai IL Also increases The eanssssty of the lake
and renders IL feasible TO build the inlet crib
aud lake end Of the tunnei without working
nsssef wafer
nKssKyotES
The available capacity Of the proposed high
service reservoir is ". az. rs gallaua
It's bottom Is to be soa feet the ton al the cor.
ms ssals feet. snd IT'S Cow hae s2gs feet above
shave h,gh tide,
The ground on the proposed site. 20 FAR as In
yestsgAfsons have shewn. y porous and without
any suitable Material To make q
puddle waf. though IL l. excel.
lent material iof solid. unyteidtug
hank. The pan 81 construction proposed de-
petals aroa the pavement 80 seeure ssger-iight.
nexs The pavement Is c0mhsratsoa ct wood
sspAsltum sna brick. 81 laia % ~ ~ ouce lni.
per1ioas and unylelasng ihe woed t.eiag - pro
teesed snd placed s. 10 he free from danger OF
decay.
Tfs tnsal esssmsfcss cost CT sAg. reservoir is
slla eai s.. or FseSG 50 pex milton eassous OF
available capacity M Is the amount OF wster
| which ts ~iH haaa between tie pasmf ~ over.
sssw Snd level nj tvs sssa half feet stcvs she
hpssofn.
In me preliminary report Il wsx statef tia,
xhenlA the city seswszn ssr SegiaS Hi Mater
wnxxs .hs building a the taw esesxlec Fexsrvssss
fhzSvsa ftesszr Eaessse sa - Get Frexl 3as lew
/ yesss ! hsxS sroeessfsd ea tbs taeu.r sas
/ asya heaee uaie M detail plans ioF sash rs
eFsaT. intending thst the ed rrsssfsls shalt &c
fe&ae - serve chs ends os TIC fisy fsy ginse
I westt recommend. howevst. tass The sste De aS-
! Qnssva a. tie sans tiase tha; around ios f,ga.-
1 cs way. sss. - eracayxsl
/ Ssaee ans pipe trea Ssxa lake j. g saeplv
/ tsein reservoirs sssae sSzsagemszf wlil have -
I Re maae ay wsssea tae ep@rxEaea Of stsafnx tAe
water aa aa4 GO tse tue reservoirs siferaslsly
/ ssa he eeasretieas ssasH aae posaa II 10 1Ass !
1 fsrosxse thai tss Heeez<RsY waves ~ plsra a.
tie 6aa SEW tee svSeTxaiT Rrct%Tsy sTTNagess n
sssns0esaAfa saasS. wnere al sYa1s,0s sAa se
/ ssssssse3,
Is the hlxhservscs rvAeryoss Il mere sAsg
thFSs Iafiss stsssas sfesa sae law service eaa.