Base from U.S. Geological Survey and/or

Washington Division of Geology and Earth Resources

digital data, 1983, 1:100,000

Universal Transverse Mercator projection, Zone 10

Horizontal Datum: North American Datum of 1927 (NAD 27)

U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

SCIENTIFIC INVESTIGATIONS REPORT 2009–5270

Measurement Sites and Generalized Surficial Geology, Lower Skagit Basin—PLATE 1

science for a changing world

Map Showing Locations of Selected Wells, Streamflow-Gaging Stations, and Streamflow-Measurement Sites, and Map Showing Generalized Surficial Geology in Tributary Subbasins and Vicinity, Lower Skagit River Basin, Washington

By

Mark E. Savoca, Kenneth H. Johnson, Steven S. Sumioka, Theresa D. Olsen, Elisabeth T. Fasser, and Raegan L. Huffman

2009

Prepared in cooperation with the

SKAGIT COUNTY PUBLIC WORKS DEPARTMENT

WASHINGTON STATE DEPARTMENT OF ECOLOGY

SKAGIT COUNTY PUBLIC UTILITY DISTRICT NO. 1 Savoca, M.E., Johnson, K.H., Sumioka, S.S., Olsen, T.D., Fasser, E.T., and Huffman, R.L., 2009, Hydrogeologic Framework, Groundwater Movement, 

and Water Budget in Tributary Subbasins and Vicinity, Lower Skagit River Basin, Skagit and Snohomish Counties, Washington

122°20' 122°10'

48°25'

48°20'

48°15'

R. 3 E. R. 4 E. R. 5 E. R. 6 E.

T. 32 N.

T. 33 N.

T. 34 N.

T. 35 N.

0 1 2 3 4 5 MILES

0 1 2 3 4 5 KILOMETERS

122°20' 122°10'

48°25'

48°20'

48°15'

R. 3 E. R. 4 E. R. 5 E. R. 6 E.

T. 32 N.

T. 33 N.

T. 34 N.

T. 35 N.

27N01

16L01

32D03

03G100

28K03

32N01

32M01

32B01

31M01

31F01

30R01

30C01

26E01

25P02

25N01

19G01

18C01 17D02

11L01

09N01

08L01

07M01

06B01

03K01

03A01

02L01

31C01

30P02

30D02

30C03

17E02

07A01

36A02

34K02

34G01 34E01

34A03

34A02

33R01

33C02

32Q01

32N01 32N02

32M01

32L01

32J01

32H01

32A01 32A02

31G01

29R01

29N01 29L01

29J02

29H02

29H01

29A02

28G02

28B01

27L01

27B01

25A01

23Q02

21N02

21C01 21A01

20P01

20F02

01K01

18C01

16H01

15E01

15C01 10R02

10Q01

10K01

10H01

08K01

08M01 09E02

09F02 10D01

10D02

07L01

07C05

07C02

06P02

06L01

06K01

06B01

05N01

05M01

05F02

04N02

04F01

03N01

03M01

03B01

01P01

31J01

34Q01

33C01 32D04

29R02

29A01

09F04

07C01

07A04

06A01

05D01

03Q01

03K02

36M01

36B01

35E01

34K01

26M02

26F01

20Q01

14L01

14F01

01B01

31B02

29H03

21F01

08J01

32F01

33P01

31L01

34D01 36C01

32J01

26P01

25D01

14P01

14L02

08N01

04C02

32P01

02B02

36N01

35R01

34G01

18R01

17B01

04F01

27P01

33J01

33A02

28H01

06H01

05A01

17C01

22Q01

19A01

17R01

03N01

31F01

30C02

19A01

17N02

17N01

17E01

08L02

06J01

34Q02

33Q01

33K01

33C03

32P01

31R01 31Q01

21G01

08J01

04M01

04D01

04C01

04A03

31C02

28F01

06K01

15R01

06G01

05A01

06K01

20P01

EXPLANATION

Generalized surficial geology—Geologic units: Older outwash (oo) and Whidbey nonglacial deposits (Qcw) are not present at land surface in the study area.

Fault—Dotted where concealed

10R02

Wells used to construct hydrogeologic framework

Core collected for this study

Additional well log used in this study

12200701

Streamflow measurement

Ecology streamflow-gaging station

USGS streamflow-gaging station—Synoptic

 measurements also taken at each station

Synoptic measurement sites

03G100

12200698

33F01

28M01

34E01

34L02

Wells used to measure water levels

Monthly

Continuous recorder

Synoptic

Constructed for this study

EXPLANATION

Boundary of tributary subbasin

Qa

Qp

Qls

Qvl

Qgoe

Qgome

Qgdme Qgtv

Qgav

Qglv

Qco

ot

OEcb

Ecbc

Evr

Alluvium

Peat

Landslide deposits

Lahar runout deposits Glaciolacustrine and

 distal outwash deposits

Olympia

 nonglacial deposits

Everson

 glaciomarine drift

Everson

 recessional outwash

Vashon till

Older till

Rocks of

 Bulson Creek

Chuckanut Formation

Metamorphic rocks

Volcanic rocks

Everson

 glaciomarine outwash

Vashon

 advance outwash

Qa

Qp

JTP

Water

Contact—Approximately located

27N01

23Q01

34E01

25J01

03K04

04C01

21H01

17D01

33G02

32P02

35D01

01A02

11C01

09R01

15D01

18A03

14B01

17D01

14J01

13P01

14R01

23A02

20E02

23N02

26M01

26R02

32L01

06B01

01A01

02E01

02B01

05M01

04N01

08D01 07B01

09F01

17J02

20B01

23N01 23Q01

25Q01

28K01

25J01

32D02

31A01

34L02

03A01

04N04 03R01

05Q03

15C01

20E01

33P01

05C02 04B01

04F01

20J02

20Q01

28K02 28M03

28M02

29Q01

31D02

33A01

34R01

03K03 05Q02

12199600

12200684

Qa

Qp

Qp

Qp

Ecbc

Evr

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

Qp

Qp

Qp

Qp

Qp

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls

Qls Qls

Qls

Qls

Qls

Qa

Qa

Qvl

Qvl

Qvl

Qvl

Qvl

Qvl

Qvl Qvl Qvl

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgdme

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgoe Qgoe

Qgoe

Qgoe

Qgoe

Qgoe

Qgome

Qgome

Qgome

Qgome

Qgome

Qgome

Qgome

Qgome

Qgome

Qgome

Qgome

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgt Qgtv v

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qgtv

Qga Qga v v

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qgav

Qglv

Qglv

Qglv

Qglv

Qglv

Qglv

Qglv

Qglv

Qco

Qco

ot

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

OEcb

Ecbc Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Ecbc

Evr

Evr

Evr

Evr

Evr

Evr

Evr

Evr

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

JTP

Qco

Qco

Qa

Qa

Qa

Qa

Qa

Qp

Qp

Qp

Qp

Qp

Qp

Qp

Qp

Qa

Qa

Qa

Qa

Qa

Qa

Qp

Qp

Qp

Qp

Qa

Qa

Qa

Qp

Qp

Qp

Qa Qa

Qa

Qp

Qp

Qa

Qa

Qa

Qp

Qgoe

Qgoe

08A01

11Q01

18A02

13M01

21C01

23A01

19M01

19K01

23R01

20N01

23N01 25B01

26L01

28K01

30J01 26R01

36M01

32P01

04C01 06D01

01G01

02M02

03P01

08P01

08R01

18A01 16E01

17J01

20F01 20J01

21N01

26B01

27A01

30C01

30D01

26A01 29B01

27E01

29J01

29Q02 27M01

31B01

33G01

34K01

34P01

04H01

05G01

03J01

02L01

04N01

17J01D1

18A01

05C01

02M01

27F01

33F01

34L01

03G01

32D01

28G01

East

Fork

Nookachamps

Creek

North

Fork

Skagit

River

Turner

Creek

Walker

Creek

Mundt

Creek

East

Fork

Nookachamps

Creek

Skagit River

Nook achamps

Creek

Carpenter

Cre

ek

28M01

Bulson

Creek

Fisher

Creek

Lake

McMurray

Sixteen

Lake

Johnson Creek

Devils

Lake

Big

Lake

Sandy

Creek

Ten

Lake

Clear

Lake

Beaver

Lake

Lake

Creek

Barney

Lake

Pilchuck

Creek

South

Fork

North

Fork

Skagit

River

Turner

Creek

Walker

Creek

Mundt

Creek

Skagit River

Carpenter

Cre

ek

Bulson

Creek

Fisher

Creek

Lake

McMurray

Sixteen

Lake

Johnson Creek

Devils

Lake

Big

Lake

Sandy

Creek

Ten

Lake

Clear

Lake

Beaver

Lake

Lake

Creek

Barney

Lake

Pilchuck

Creek

South

Fork

North

Fork

Skagit

River

Turner

Creek

Walker

Creek

Mundt

Creek

East

Fork

Nookachamps

Creek

East

Fork

Nookachamps

Creek

Skagit River

East

Fork

Nookachamps

Creek

East

Fork

Nookachamps

Creek

Nook achamps

Creek

Nook achamps

Creek

Carpenter

Cre

ek

Bulson

Creek

Nookachamps

Cre

ek

Nookachamps

Cre

ek

Fisher

Creek

Lake

McMurray

Sixteen

Lake

Johnson Creek

Devils

Lake

Big

Lake

Sandy

Creek

Ten

Lake

Clear

Lake

Beaver

Lake

Lake

Creek

Barney

Lake

Pilchuck

Creek

South

Fork

East

Fork

Nookachamps

Creek

Nookachamps

Cre

ek

Nookachamps

Cre

ek

Skagit Bay Skagit Bay

12200686

12200698

12200699

12200022

12200015

12200005

12200010

12199900

12199560

12199540

12200694 12200692

12199860

12199890

12199300

12199400

12200696

12200682

12200685

12200688

1220070120

1220070140

1219949950

12199870

12200701