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CentralWillamette
Basin
SouthernWillamette
Basin
StaytonBasin
TualatinBasin
PortlandBasin
BasinWillamette
OREGON
BCU
CRB
LSU
MSU
USU
HCU
WSU
EXPLANATION
200
Boundary of figures showing hydrologic unit thickness in this report
Trace of hydrogeologic sections
Line of equal water-table altitude in the basin-fill sediments— One hundred foot contours are bold. Intermediate contours are multiples of 20 feet.
Selected well used in analysis—Number is defined in the well-number diagram, see table of contents.
Hydrogeologic unit
High Cascade unit
Upper sedimentary unit
Willamette silt unit
Middle sedimentary unit
Lower sedimentary unit
Columbia River basalt unit
Basement confining unit
20 MILES
10
10
20 KILOMETERS
0
0
A A'
29DAD
ginddu
P
N Fk
M Fk etteWillam
River
Moh
awk
Marys
Middle
Santiam
North
Santiam
Santiam
River
Littl
e
Pud
ding
Riv
er
Cha
mpo
eg
Cre
ek
Creek
Creek
Creek
Abiqua
Zollner
Creek
Mill
Butte
Cas
eC
reek
South
River
North
River
Drift
Creek
Clackamas
Bull
RunRiver
River
Molalla
Calapooia
River
River
River
Sandy
JohnsonCreek
River
River
River
River
e
McKenzi
River
tte
Willame
Rive
r
Coa
st
ForkTualatin
River
South
River
Yamhill
ette
Will
am
IA
COLUMB
RRIVE
TE
AM
ET
WIL
L
RIVER
Yamhill
River
Long
Tom
Riv
er
Luckiamute
GreenPeterLake
BlueRiverLake
CougarReservoir
WaldoLake
FallCreekLake
LookoutPointLake
CottageGrove
Lake
DorenaLake
HillsCreekLake
FosterLake
DetroitLake
TimothyLake
HenryHaggLake
Bull RunReservoir No. 2
Bull RunReservoir No. 1
BullRunLake
H M A OT N LM U
MBIACOLU
WA S H I N G T O N
SM A AC K AC L
K LP O
B E N T O N
NNIL
O N I RM A
E N L A
LASDOUG
L LH I MY A
LASDOUG
EG
NA
RT
SA
OC
EG
NA
R
ED
AC
SA
C
44°00'
15'
45' 45'
15'
30'
44°00'
15'
30'
45' 45'
43°30' 43°30'
45°00' 45°00'
122°00'30'
30'
123°00'
15'
15'
15'
45'
121°45'
121°45'
30'
122°00'
30'
123°00'
15'
15'
45'
30'
30'
45°45' 45°45'
123°45'
123°45'
boundary
Basin
Fork
Middle
River
CrystalSpringsCreek
FernRidgeLake
R. 8 E.
R. 6 W.
T. 10 S.T. 10 S.
T. 14 S.
T. 24 ST. 24 S
T. 22 S.
T. 22 S.
T. 20 S.
T. 20 S.
T. 18 S.
T. 18 S.
T. 16 S.T. 16 S.
T. 14 S.
T. 4 N.T. 4 N.
T. 2 N.T. 2 N.
T. 2 S.T. 2 S.
T. 4 S.
T. 4 S.
T. 6 S.T. 6 S.
T. 8 S.T. 8 S.
R. 6 E.
R. 4 E.
R. 2 E.
R. 2 W.
R. 4 W.
R. 8 E.
R. 6 E.R. 4 E.
R. 2 E.
R. 2 W.
R. 4 W.
R. 6 W.
R. 8 W.
R. 8 W.T. 12 S.
T. 12 S.
SalemHills
Cooperand Bull
Mountains
ChehelamMountains
ParrettMountain
EolaHills
WaldoHills
Portland Hills
CRB
CRB
CRB
CRB
CRB
CRB
CRB CRB
CRB
CRB
CRB
CRB
CRBCRB
CRB
CRB
CRB
CRB
CRB
CRB
CRB
CRB
CRB
CRB
CRB
CRBCRB
CRB
CRB
CRB
CRB
LSU
LSU
LSU
LSU
LSU
LSU
MSU
MSU
MSU
MSU
MSUMSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
MSU
USU
USU
USU
USUUSU
USU
USU
USU
USU
USU
USU
USU
USU
USU
USU
HCU
HCU
HCU
HCU
HCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
WSU
BCU
BCU
BCU
BCU
BCU
BCUBCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
BCUBCU
BCU
BCU
BCU
BCU
BCU
BCU
BCU
SalemDallas
Eugene
Portland
Keizer
Corvallis
Harrisburg
Springfield
Monmouth
Woodburn
Newberg
OregonCity
MountAngel
Wilsonville
SaintPaul
Aurora
Albany
Milwaukie
Troutdale
Fairview
Damascus
Sherwood
Tigard
Tualatin
Beaverton
NorthPlains
Banks
Dayton
Lafayette
ScottsMills
Monroe
Brownsville
Halsey
Veneta
Dundee
Amity
Silverton
Boring
Gervais
Donald
Stayton
Hillsboro
Sublimity
LakeOswego
Portland Hills - Clackamas River Structural Zone
Gales Creek - Mt. Angel Structural Zone
U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2005–5168Hydrogeologic map with selected wells and cross-sections—PLATE 1
Conlon and others, 2005—Ground-water hydrologyof the Willamette Basin, Oregon
MAP AND CROSS SECTIONS SHOWING THE GENERALIZED HYDROGEOLOGY AND WATER TABLE OF THE WILLAMETTE BASIN AND LOCATIONS OF SELECTED WELLSBy
Terrence D. Conlon, Karl C. Wozniak, Nora B. Herrera, and Tana L. Haluska2005
Prepared in cooperation with
Oregon Water Resources Department
Base composited fromUSGS digital line graphs and other digital information.Universal Transverse Mercator projection, zone 101927 North American DatumLongitude of Central Meridian: -123.000000 Latitude of Projection Origin: 0.000000 False Easting: 500000.000000 False Northing: 0.000000
A'
B'
C'
D'D
C
B
A
300
280260
340
320
80
180
180
180
180
180140
140
160
140
140
140
140
120
100
60
100
100
80
100
180
180
180
180
500
440
460
460
480
560
540
520
420
400
360
380
260
280
300
44042
038036
0
400
180
240200
220
300
340
320
320
280260
300
340
380
360
400
420440
140
180
160 14
0
140
140
140
220
260240
200
120
120
140
160
160
160
280
19ACD1
29ACC30CAA130CAA2
02BAC202BAC1
26AAD
35CDC
19CCB1
12BAA
09BDC207CCB
07BCC201ABB34DDC
34CDA
35DDD02AAA
28BDD128CAA
14DCA15DCB0115DCB03
35DDD
13BAD01
12CDB0212CDB01
11CCC
28ADD28ADD01
36BBC
36DBC136DDC
02CAA01
21CAD
21CDC0121CDC02
15ABD01
22AAA01
17DAD17DBC
06DAD
36DAA34CBB
04ACD06CBC03ABD
19DCC
18AB1
18BAD18BAD01
08CCB108CBC01
08CCA2
19ACA0119ACD01
15BDD
11ADA01
16DDD
17ACA
24BAA0115CAC
32ADD
21CCC20CBD220CBD1
13CDA113CDA2
16BAA0116BDA01
24BBC0224BBC01
04ACC
04BAD33CBC
21DDD21CDD217CDB 21DAD223ACB
05CDC06ADD
01CDD0101CDD02
02BBD
36ACA36ABA
30DDB130DDB2
01DDA
06CCC
28CCD0128CCD02
16AAB01
16ABC01
08DAC01,0308DAD01-06
09DCA
34ACD 34ADB
05CBB
29DAD
17DAB17ACC
03AAD01
03ABA
06BAA1
08BCA
35CDD
3000
2000
1000
0
1000
2000
3000
2000
1000
0
1000
2000
Wes
t For
k D
airy
Cre
ek
East
For
k D
airy
Cre
ek
McK
ay C
reek
Daw
son
Cre
ek
Rock
Cre
ek
Rock
Cre
ek
Tick
le C
reek
Nor
th F
ork
Dee
p C
reek
Bear
Cre
ek
Bron
son
Cre
ek
Will
amet
te R
iver
John
son
Cre
ek
A‘A
VERTICAL SCALE GREATLY EXAGGERATED
3000
2000
1000
1000
2000
3000
2000
1000
0
1000
2000
0
Butte
Cre
ek
Pudd
ing
Rive
r
Mill
Cre
ek
Mis
sion
Cre
ek
East
Cha
mpo
eg C
reek
Wes
t Cha
mpo
eg C
reek
Will
amet
te R
iver
Palm
er C
reek
Wes
t For
k Pa
lmer
Cre
ek
Sout
h Ya
mhi
ll Ri
ver
Bake
r Cre
ek
B'B
1000
500
0
500
1000
1500
1000
500
0
500
1000
1500
C'C
Gle
nn C
reek
Will
amet
te R
iver
Littl
e Pu
ddin
g Ri
ver
Pudd
ing
Rive
rSo
uth
Sant
iam
Riv
er
Oak
Cre
ek
Cal
apoo
ia R
iver
Will
amet
te R
iver
Dix
on C
reek
D'D
1000
500
0
500
1000
1000
500
0
500
1000
FEET FEET
FEETFEET
FEETFEET
FEETFEET
ELEV
ATIO
N
ELEV
ATIO
NEL
EVAT
ION
ELEV
ATIO
NEL
EVAT
ION
ELEV
ATIO
N
ELEV
ATIO
N
ELEV
ATIO
N
CRB
LSU
LSU
WSU
USU
WSU
LSULSU
MSU
MSU
MSU
LSU
WSUMSU
MSU
CRB
CRB
CRB
BCU
BCU
BCU
BCU
USU USU
WSU
USU
USU