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