Post on 13-Jul-2020
San M
ateo C
reek
Pila
rci
to
s Cre
ek
Pilarcitos Creek
San Mateo C
reek
Spring Valley Creek
PilarcitosReservoir
Crystal SpringsCrystal SpringsReservoirReservoirCrystal SpringsReservoir
PilarcitosDam
Upper CrystalSprings Dam
PulgasWater Temple
PulgasTunnel(from HetchHetchyAqueduct)
Lower CrystalSprings Dam
Water QualitySamplingStation #5
Lower CrystalSprings Dam
Water QualitySamplingStation #5
Crystal SpringsPump Station
San Andreas Creek
San AndreasDam
Harry W. TracyWater TreatmentPlant
Bay DivisionPipelinesNo. 1 & 2No. 3 & 4
(from HetchHetchy
Aquaduct)
San AndreasSan AndreasReservoirReservoirSan AndreasReservoir
Crystal Springs/San Andreas Pipeline
San Francisco
Millbrae
CRYSTALSPRINGS
RESERVOIR
San Francisco Bay
Pacific
Ocean
SFPUC Lower Crystal Springs Dam Improvements
Figure 1Project Location
SOURCE: ESA + Orion; USGS 1978
0 2
Miles
Proposed Project
SF
PU
C L
ower
Cry
stal
Spr
ings
Dam
Impr
ovem
ents
Fig
ure
2P
ropo
sed
Mod
ifica
tions
to L
ower
Cry
stal
Spr
ings
Dam
, Pla
n V
iew
SO
UR
CE
: UR
S, 2
006
FOR
ILLU
STR
ATI
ON
PU
RP
OS
ES
ON
LYsc
ale
and
mea
sure
men
ts a
reap
prox
imat
ed
010
0
Fee
t
C L
208'
175'
RA
ISED
PAR
APE
TW
ALL
RA
ISED
PAR
APE
TW
ALL
ENLA
RG
ED N
EWST
ILLI
NG
BA
SIN
NEW
RIP
RA
PST
REA
M B
AN
KPR
OTE
CTI
ON
NEW
RIP
RA
P W
ITH
IN B
ASI
N
*Sky
line
Bou
leva
rd B
ridge
Not
Sho
wn
RA
ISED
AN
DEN
LAR
GED
SPI
LLW
AY
NEW
TR
AIN
ING
WA
LL
NEW
TR
AIN
ING
WA
LL
138’
125’ 20’
Re-
Sur
face
d S
pillw
ay
Ver
tical
line
bel
ow s
how
s lo
catio
n of
cros
s-se
ctio
n sh
own
in F
igur
e 3
Bol
d fo
nt in
dica
tes
prop
osed
mod
ifica
tions
C L A
Sky
line
Bou
leva
rd*
Skyl
ine
Boul
evar
d*
Dow
nstre
amFa
ce o
f Dam
Cry
stal
Spr
ings
Res
ervo
ir
Ups
tream
Face
of D
am
San
Mat
eo C
reek
Cha
nnel
Administrative Draft (July 2009) − Subject to Change
SF
PU
C L
ower
Cry
stal
Spr
ings
Dam
Impr
ovem
ents
Fig
ure
3P
ropo
sed
Spi
llway
Mod
ifica
tions
,C
ross
-sec
tion
Vie
w
SO
UR
CE
: UR
S, 2
007
FOR
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STR
ATI
ON
PU
RP
OS
ES
ON
LYsc
ale
and
mea
sure
men
ts a
reap
prox
imat
edB
old
font
indi
cate
s pr
opos
edm
odifi
catio
nsA
NE
W O
GE
ES
PIL
LWA
Y S
UR
FAC
E
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nstr
eam
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e of
Dam
Exi
stin
g P
arap
etW
all
Exi
stin
g S
pillw
ay F
loor
-C
rest
Ele
vatio
n 28
3.8’
NE
W S
PIL
LWA
YC
RE
ST
EL
EVA
TIO
NC
RE
ST-
291
.8’
Ups
trea
mF
ace
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am
Crystal
Springs
Reservoir
Exi
stin
g S
topl
og S
yste
m
HE
IGH
TE
NE
D A
ND
ST
RE
NG
TH
EN
ED
PAR
AP
ET
WA
LL
43.0
’
SFPUC Lower Crystal Springs Dam Improvements
Figure 4Proposed Stilling Basin Modifications,
Plan and Cross-section Views
SOURCE: URS, 2009
0 60
Feet
0 60
Feet
RIP RAP
STILLING BASIN PLAN VIEW
CROSS SECTION THROUGH CENTERLINE OF STILLING BASIN
STILLING BASIN
EXISTINGSTILLINGBASIN
138’
102’
32’
WING WALL
SAN MATEO CREEK
SAN MATEO CREEK
SAN MATEO CREEK
MODIFIED DRAINFROM SKYLINE BOULEVARD
WING WALL
SIDE WALLSIDE WALL
DOWNSTREAM FACEOF LOWER CRYSTALSPRINGS DAM
SF
PU
C L
ower
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ings
Dam
Impr
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ents
Fig
ure
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ater
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: SF
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ct
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