Washington County, OR

326 public highway bridges

Washington County Bridge Snapshot

Washington County, Oregon contains 326 public highway bridges in the FHWA National Bridge Inventory. Roughly 34% are rated “Good,” 47.5% “Fair,” 2.1% “Poor,” and 2.1% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in OR are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

326

Total Bridges

34%

Good

2.1%

Poor

2.1%

Structurally Deficient

Condition Distribution

Good

34% (111)

Fair

47.5% (155)

Poor

2.1% (7)

SD

2.1% (7)

All Bridges (326)

Sort:

SW MURRAY BLVD

Over: SUMMER CREEK

.25 MI S OF SCHOLLS FERY, Washington, OR

Built 2007 Load: 34.7 t ADT: 3,373

US 26 (HWY 047) EB

Over: PNWR & VADIS

17.0 MI W PORTLAND SWCL, Washington, OR

Built 1971 Load: 35.0 t ADT: 11,519

CORNELIUS PASS RD

Over: ROCK CREEK

003 MI N R/R UNDERPASS, Washington, OR

Built 2012 Load: 36.3 t ADT: 25,168

CEDAR CANYON ROAD

Over: WEST FORK DAIRY CREEK

0072 W HWY 47, Washington, OR

Built 1971 Load: 36.3 t ADT: 1,895

197TH AVE

Over: BEAVERTON CREEK

001 MI S BASELINE RD, Washington, OR

Built 1971 Load: 36.3 t ADT: 7,559

US 26 (Hwy 047)

Over: Light Rail Transit

.3 M W OF HWY 144, Washington, OR

Built 1996 Load: 37.2 t ADT: 115,947

BASELINE RD

Over: BEAVERTON CREEK

0065 MI W 185TH AVE, Washington, OR

Built 2002 Load: 37.2 t ADT: 21,956

RODERICK ROAD

Over: GALES CREEK

001 MI W GALES CREEK ROAD, Washington, OR

Built 1972 Load: 37.2 t ADT: 184

US 26 (Hwy 047) EB

Over: East Fork Dairy Creek

20.0 MI W OF PORTLAND CC, Washington, OR

Built 1971 Load: 37.3 t ADT: 11,519

HORNECKER ROAD

Over: MCKAY CREEK

005 E PADGETT ROAD, Washington, OR

Built 1978 Load: 38.1 t ADT: 2,432

SW SPRING HILL RD

Over: TUALATIN RIVER OVERFLOW

002 MI S R/R X-ING, Washington, OR

Built 2017 Load: 38.6 t ADT: 1,098

WEST UNION ROAD

Over: ROCK CREEK

0041 MI W 185TH AVENUE, Washington, OR

Built 1978 Load: 39.0 t ADT: 7,789

US 26 (Hwy 047) EB

Over: Bledsoe Creek

20.0 MI W OF PORTLAND CC, Washington, OR

Built 1971 Load: 39.9 t ADT: 11,519

GOLF COURSE ROAD

Over: TUALATIN RIVER OVERFLOW

010 MI S HWY 8, Washington, OR

Built 1997 Load: 39.9 t ADT: 3,824

VERNONIA RD

Over: NEHALEM RIVER

002 MI N SUNSET HWY, Washington, OR

Built 2006 Load: 39.9 t ADT: 367

HWY 144AP

Over: ALLEN BLVD

0.3 MI S OF CABOT ST, Washington, OR

Built 2023 Load: 40.8 t ADT: 19,471

HWY 144AR

Over: ALLEN BLVD

0.3 MI S OF CABOT ST, Washington, OR

Built 2023 Load: 40.8 t ADT: 19,471

MEACHAM ROAD

Over: E FORK DAIRY CREEK

002 MI W DAIRY CREEK ROAD, Washington, OR

Built 2011 Load: 41.5 t ADT: 152

NW SHADYBROOK ROAD

Over: MCKAY CREEK

027 MI NE OF NORTH PLAINS, Washington, OR

Built 1983 Load: 41.7 t ADT: 3,925

SW BUTNER ROAD

Over: CEDAR MILL CREEK

0107 MI E MURRAY BLVD, Washington, OR

Built 1987 Load: 41.7 t ADT: 5,241

SW SEIFFERT RD

Over: HEATON CREEK

0.5 MI SOUTH HWY 219, Washington, OR

Built 1972 Load: 42.6 t ADT: 1,147

114TH Ave

Over: Beaverton Creek

114TH Ave, Washington, OR

Built 2008 Load: 42.8 t ADT: 1,500

RITCHEY ROAD

Over: GALES CREEK

012 MI E STRINGTOWN RD, Washington, OR

Built 1985 Load: 42.8 t ADT: 749

OR 217 (HWY 144)

Over: ASHBROOK CREEK

0.8 MI N OF HWY 1W, Washington, OR

Built 1970 Load: 43.1 t ADT: 97,018

NW DAIRY CREEK RD

Over: E FORK DAIRY CREEK

006 MI N MOUNTAINDALE RD, Washington, OR

Built 1969 Load: 43.1 t ADT: 1,572

OR 47 (Hwy 102)

Over: Dairy Creek Overflow

1.0 MI N BANKS, Washington, OR

Built 2006 Load: 44.1 t ADT: 3,391

SW 135th Avenue

Over: Summer Creek

0.2 mi S of Scholls Fy Rd, Washington, OR

Built 1996 Load: 45.0 t ADT: 1,272

NE Airport Rd

Over: Dawson Cr

009 MI EAST OF 264TH AVE, Washington, OR

Built 2006 Load: 45.4 t ADT: 54

DENNEY RD ACCESS N

Over: FANNO CREEK

001 N OF DENNEY RD, Washington, OR

Built 1977 Load: 45.4 t ADT: 16

DENNEY RD ACCESS S

Over: FANNO CREEK

001 S OF DENNEY RD, Washington, OR

Built 1977 Load: 45.4 t ADT: 2,125

VERNONIA RD

Over: ROBINSON CREEK

1.4 NO. HWY 26/CO. 9 JCT, Washington, OR

Built 1960 Load: 46.1 t ADT: 378

HARRINGTON ROAD

Over: E FK DAIRY CREEK

008 MI E ROY ROAD, Washington, OR

Built 1985 Load: 47.2 t ADT: 809

COCHRAN RD

Over: NEHALEM RIVER

016 MI W TIMBER RD, Washington, OR

Built 1980 Load: 47.2 t ADT: 194

HARRINGTON ROAD

Over: BLEDSOE CREEK

010 MILE EAST OF ROY, Washington, OR

Built 1985 Load: 48.1 t ADT: 809

US 26 (HWY 047)

Over: West Fork Dairy Creek

7.1 MI W HWY 37 JCT, Washington, OR

Built 2013 Load: 49.2 t ADT: 11,433

SW MURRAY BLVD

Over: CEDAR MILL CREEK

1 MI S/O HWY #26, Washington, OR

Built 1987 Load: 49.9 t ADT: 28,683

US 26 (HWY 047)

Over: Ghost Creek

17.3 MI W OF Portland CC, Washington, OR

Built 2012 Load: 50.5 t ADT: 36,756

BROOKWOOD AVE

Over: TRI MET LIGHT RAIL TRACK

2.2 MI N TV HWY., Washington, OR

Built 2001 Load: 51.7 t ADT: 11,788

S W BONITA ROAD

Over: FANNO CREEK

005 MI WEST INTERSTATE 5, Washington, OR

Built 1971 Load: 52.2 t ADT: 12,041

SCHOLLS FERRY RD

Over: FANNO CREEK

020 MI SE BEAVERTON CC, Washington, OR

Built 2012 Load: 52.8 t ADT: 18,966

I-5 (HWY 001) SB

Over: BEAVER DAM CREEK

0.5 MI S OF TUALATIN R., Washington, OR

Built 1975 Load: 53.1 t ADT: 69,744

HWY 141

Over: TUALATIN RIVER

4.0 MI N OF HWY 1, Washington, OR

Built 1967 Load: 53.5 t ADT: 20,550

OR 6 (Hwy 037)

Over: South Fork Gales Creek

120 MI W OF HWY 47 JCT, Washington, OR

Built 1956 Load: 54.4 t ADT: 5,608

TIMBER ROAD

Over: BEAVER CREEK

NORTH OF GLENWOOD, Washington, OR

Built 2006 Load: 55.3 t ADT: 4,371

NORTHRUP ROAD

Over: MCKAY CREEK

006 MI W DIXIE MOUNTAIN, Washington, OR

Built 2000 Load: 56.2 t ADT: 231

RIVER RD

Over: ROCK CREEK

00.1 EAST ROOD BR ROAD, Washington, OR

Built 2009 Load: 57.3 t ADT: 10,661

TIMBER ROAD

Over: BEAVER CREEK

NORTH OF GLENWOOD, Washington, OR

Built 2001 Load: 59.9 t ADT: 4,243

209TH AVE

Over: BUTTERNUT CREEK

0.6 mi W of Br.671214, Washington, OR

Built 2009 Load: 63.2 t ADT: 13,751

ROY ROGERS RD.

Over: CHICKEN CREEK

005 MI NW HWY 99, Washington, OR

Built 2000 Load: 64.4 t ADT: 15,717

HWY 140

Over: CAMPBELLS CREEK

AT HWY 142 JCT, Washington, OR

Built 2007 Load: 64.5 t ADT: 4,161

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026