U.S. DEPARTMENT OF THE INTERIOR Prepared in cooperation with Scientific Investigations Report 2005–5168 U.S. GEOLOGICAL SURVEY Oregon Water Resources Department Hydrogeologic map with selected wells and cross-sections—PLATE 1 Conlon and others, 2005—Ground-water hydrology of the Willamette Basin, Oregon

123°00'

R. 2 W. A A‘ FEET FEET 2000 2000 CRB 45' Bear Creek CRB 1000 1000

North Fork Deep Creek MSU Tickle Creek Tickle West Fork Dairy Creek West East Fork Dairy Creek Rock Creek Bronson Creek Bronson Dawson Creek McKay Creek USU BCU Rock Creek Johnson Creek Willamette River Willamette MSU T. 4 N. T. 4 N. 0 0 LSU 15' COLUMBIA LSU ELEVATION

USU ELEVATION 1000 CRB 1000 R. 4 W. 06BAA1 BCU CRB 2000 2000 45°45' BCU 45°45' BCU

3000 3000 R. 6 W. CRB CRB COLUMB

BCU Portland Hills IA T. 2 N. WASHINGTON T. 2 N. 30' B' 122°00' B CRB FEET FEET R. 2 E. 2000 2000 Banks 180 35CDD 03ABA 180 North 15' A Plains RIVE 1000 1000 08BCA 03AAD01 R WSU USU WSU South Yamhill River South Yamhill Palmer Creek West Champoeg Creek West East Champoeg Creek Mission Creek Pudding River West Fork Palmer Creek West Willamette River Willamette Baker Creek

MSU Butte Creek 17DAB Bull Run Mill Creek 17ACC Reservoir No. 2 0 0 Fairview R. 4 E. R. 6 E. LSU BCU Henry 180 121°45' USU Troutdale LSU ELEVATION Hagg ELEVATION Gales Creek - Mt. Angel Structural Zone Hillsboro 1000 1000 Lake 140 Portland 16BAA01 River R. 8 E. 180 180 30' CRB 30' 180 24BBC01 16BDA01 CRB 24BBC02 MSU Run Beaverton 2000 BCU 2000 E Tualatin LSU Crystal Johnson 21DAD2 Springs M U L T N O M A H 140 23ACB 17CDB Creek CRB 21CDD2 21DDD 13CDA1 13CDA2 Creek Cooper180 MSU Bull Bull 3000 3000 33CBC Tigard Milwaukie Boring Bull Run Run and Bull 04BAD G River Reservoir No. 1 Lake Lake Sandy BCU Mountains 04ACC 05CBB Oswego CRB Damascus CRB 140 20CBD1 20CBD2 Chehelam 140 CRB T. 2 S. T. 2 S. LSU CRB Tualatin 21CCC MSU N North Yamhill 29DAD River Mountains 140 CRB LSU Sherwood MSU BCU BCU 34ACD 34ADB 32ADD C C' Oregon Portland Hills - Clackamas River StructuralA' Zone FEET FEET

WSU City E 1500 1500 A 30' Parrett 17ACA 15CAC WSU 1000 1000 WSU WSU Mountain USU Pudding River Wilsonville 24BAA01 MSU 16DDD LSU Little Pudding River 500

500 River Willamette Glenn Creek River Newberg Dundee 123°45' 36ABA 80 LSU 0 0

R G ELEVATION 140 60 36ACA WSU 100 ELEVATION CRB CRB 500 BCU 500 15' 06ADD Clackamas BCU 15' Lafayette 100 02BBD 11ADA01 CRB HCU 1000 1000 05CDC B Donald 160 BCU T. 4 S. 80 Aurora 140 MSU

01CDD01 15BDD N Dayton 01CDD02 USU R. 8 W. BCU Creek LSU Saint 19ACA01 120 Paul T. 4 S. Case 19ACD01 Creek

140 WSU

Molalla A 140 USU River 100 01DDA Woodburn MSU 08CBC01 River D D' Champoeg08CCB1 Y A M H I L L CRB 08CCA2 FEET FEET

19DCC Butte C L A C K A M A S 1000 USU WSU 1000 WSU R USU South 28CCD01 CRB AmityEola LSU MSU 28CCD02 South Santiam River

Timothy 500 Oak Creek 500 Dixon Creek

Zollner River Willamette 34CBB Gervais 08DAD01-06 180 Calapooia River 36DAA 08DAC01,03 CRB Lake Hills 120 0 0 Yamhill 03ABD 06CCC 09DCA Creek RIVER 160 04ACD 16AAB01Creek ELEVATION 500 BCU 500 ELEVATION BCU 06CBC 06DAD Mount B' WSU 15ABD01 Scotts 140 River Angel 1000 1000 100 16ABC01 Mills

17DAD Pudding VERTICAL SCALE GREATLY EXAGGERATED T. 6 S. 17DBC CRB T. 6 S. g 21CAD 22AAA01 AbiquaCRB River in 120 d MSU WSU d 21CDC01 160 Silverton u 36DBC1 45°00' BCU 21CDC02 45°00' P 36DDC C Keizer 02CAA01 36BBC CRB 18AB1 CRB 28ADD CRB Creek 18BAD 28ADD01

18BAD01 WaldoDrift River Mill Little BCU Salem Hills Dallas C' 200 140 123°45' WSU 160 12CDB01 Creek CRB 180 EXPLANATION 140 11CCC BCU 12CDB02 BCU P O L K BCU Creek 160 Hydrogeologic unit T. 8 S. 220 13BAD01 30DDB1 Boundary of figures showing hydrologic unit thickness in this report Salem 30DDB2 T. 8 S. CRB BCU HCU High Cascade unit 240 360 BCU 180 320 MSU A A' 260 HCU Trace of hydrogeologic sections Monmouth Hills Sublimity 280 USU Upper sedimentary unit 35DDD 440 200 Line of equal water-table altitude in the basin-fill sediments— 340 CRB 300 380 One hundred foot contours are bold. Intermediate contours are MSU Stayton MSU WSU Willamette silt unit CRB multiples of 20 feet. BCU 420 14DCA M A R I O N Luckiamute River WSU USU 400 Santiam 15DCB01 MSU Middle sedimentary unit 29DAD WSU 15DCB03 USU Selected well used in analysis—Number is defined in the 45' BCU 300 45' MSU CRB MSU River well-number diagram, see table of contents. 280 LSU 260 MSU Lower sedimentary unit North CRB USU 180 121°45' MSU CRB Columbia River basalt unit WSU WSU T. 10 S. BCU BCU CRB Detroit T. 10 S. Lake BCU BCU CRB BCU BCU BCU MSU WSU Basement confining unit CRB BCU Albany BCU WSU

South L I N N E WSU 200 BCU 240 34CDA 280 28BDD1 260 MSU 0 10 20 MILES

220 D Marys D 28CAA USU 320 Corvallis 35DDD 300 02AAA 34DDC 01ABB 12BAA D' T. 12 S. 07BCC2 340 0 10 20 KILOMETERS R. 8 W. 09BDC2 07CCB WSU A T. 12 S. River Green Santiam 19CCB1 MSU 400 BCU Santiam Peter 30' 30' Lake 35CDC 360

380 MSU C 420 River BENTON 440

TE

WSU Foster T

River Lake Middle S USU AMET BCU Brownsville USU USU MSU

S WILL Calapooia Halsey A 260 MSU WSU T. 14 S. Willamette T. 14 S.

A Basin Monroe C 280

WSU

River O OREGON Harrisburg MSU 19ACD1 300 15' 15' River C Blue BCU River 320 Lake HCU Tualatin Portland T. 16 S. T. 16 S. BCU WSU Basin Basin 26AAD 340 MSU River

Long Tom USU River Mohawk 02BAC1 Fern 02BAC2 360 400 Ridge USU 460 420 e Lake MSU 440 380 29ACC 30CAA1 480 McKenzi Cougar MSU 30CAA2 Reservoir Veneta Eugene Springfield Central 560 540 520

BCU 500 Willamette T. 18 S.

460 44°00' Basin 44°00' Middle MSU T. 18 S. L A N E 30' R. 6 W. MSU USU BCU River MSU Fall Creek BCU Lake MSU Fork Stayton R. 8 E. MSU Lookout M Fk Willamette Basin ette Point HCU Lake

USU

River

Willam T. 20 S. Willame

T. 20 S. tte N Fk Southern

MSU Willamette Dorena 45' 45' Lake Waldo Basin

Fork River Lake 15'

Cottage Grove Lake BCU T. 22 S. T. 22 S. Hills HCU

Coast Creek Lake

R. 4 W.

R. 2 E. boundary R. 2 W. Basin 43°30' 43°30' DOUGLAS T. 24 S 123°00' T. 24 S 122°00' 45'

30' DOUGLAS

Base composited from USGS digital line graphs and other digital information. Universal Transverse Mercator projection, zone 10 R. 6 E. 1927 North American Datum R. 4 E. Longitude of Central Meridian: -123.000000 Latitude of Projection Origin: 0.000000 15' False Easting: 500000.000000 False Northing: 0.000000

MAP AND CROSS SECTIONS SHOWING THE GENERALIZED HYDROGEOLOGY AND WATER TABLE OF THE WILLAMETTE BASIN AND LOCATIONS OF SELECTED WELLS By Terrence D. Conlon, Karl C. Wozniak, Nora B. Herrera, and Tana L. Haluska 2005