Lewis County, WA

422 public highway bridges

Lewis County Bridge Snapshot

Lewis County, Washington contains 422 public highway bridges in the FHWA National Bridge Inventory. Roughly 37.4% are rated “Good,” 54.5% “Fair,” 3.3% “Poor,” and 3.3% 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 WA 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.

422
Total Bridges
37.4%
Good
3.3%
Poor
3.3%
Structurally Deficient

Condition Distribution

Good
37.4% (158)
Fair
54.5% (230)
Poor
3.3% (14)
SD
3.3% (14)

All Bridges (422)

STATE PARKS TRAIL

Unknown

Over: STATE ROUTE 6

4.9 E PACIFIC CO, Lewis, WA

Built 1931 ADT: 2,463

I-5

Unknown

Over: SR 507 MELLEN ST

JCT I-5, Lewis, WA

Built 1951 ADT: 6,179

WEST ST

Unknown

Over: I-5

0.4 N JCT SR 6, Lewis, WA

Built 1953 ADT: 76,505

I-5

Unknown

Over: COWLITZ RIVER

2.0 N COWLITZ CO, Lewis, WA

Built 1953 ADT: 360

I-5

Unknown

Over: COWLITZ RIVER

2.0 N COWLITZ CO, Lewis, WA

Built 1953 ADT: 360

SR 505

Unknown

Over: I-5

JCT SR 505, Lewis, WA

Built 1954 ADT: 39,562

13TH ST RICE

Unknown

Over: I-5

5.5 N JCT SR 508, Lewis, WA

Built 1958 ADT: 60,438

US 12

Unknown

Over: I-5

5.0 N JCT SR 505, Lewis, WA

Built 1958 ADT: 42,189

SR 506

Unknown

Over: I-5

JCT SR 506, Lewis, WA

Built 1958 ADT: 41,665

BRIDGEOVER RD

Unknown

Over: US 12

5.0 E JCT SR 7, Lewis, WA

Built 1966 ADT: 4,992

I-5

Unknown

Over: HARRISON AVE

1.1 N JCT SR 507, Lewis, WA

Built 1972 ADT: 24,802

ROGERS RD

Unknown

Over: I-5

0.2 N COWLITZ CO, Lewis, WA

Built 1976 ADT: 41,227

KOONTZ RD

Unknown

Over: I-5

1.0 N JCT US 12, Lewis, WA

Built 1976 ADT: 51,653

PARK RD

Unknown

Over: I-5

3.0 N JCT SR 505, Lewis, WA

Built 1977 ADT: 44,966

SR 6

Unknown

Over: I-5

6.9 N JCT SR 508, Lewis, WA

Built 1980 ADT: 65,022

SR 508

Unknown

Over: I-5

2.6 N JCT US 12, Lewis, WA

Built 1986 ADT: 50,392

LABREE ROAD

Unknown

Over: I-5

3.7 N JCT SR 508, Lewis, WA

Built 2008 ADT: 59,955

SR 507 NB

Unknown

Over: I-5, RAMP

3.4 N JCT SR 6, Lewis, WA

Built 2014 ADT: 65,245

CHAMBER WAY

Unknown

Over: I-5

1.1 N JCT SR 6, Lewis, WA

Built 2018 ADT: 64,598

PEDESTRIANS

Unknown

Over: SR 6

23.4 E PACIFIC CO, Lewis, WA

Built 2023 ADT: 8,850

US 12

Fair

Over: SLIDE AREA

5.0 E JCT SR 123, Lewis, WA

Built 1968 Load: 12.6 t ADT: 1,729

JACKSON HWY

Fair

Over: LAUSSIER CR.

4.36 S JCT US 12, Lewis, WA

Built 1926 Load: 13.6 t ADT: 932

NE EXHIBITOR RD.

Fair

Over: SALZER CREEK

0.1 W OF NE KRESKY, Lewis, WA

Built 1971 Load: 13.6 t ADT: 1,951

N NATIONAL AVE

Fair

Over: SALZER CREEK

0.1 N OF NE HAMPE, Lewis, WA

Built 1936 Load: 13.6 t ADT: 8,038

RIVERSIDE DR

Fair

Over: DILLENBAUGH CREEK

RIVERSIDE DRIVE, Lewis, WA

Built 1952 Load: 13.6 t ADT: 3,910

PARADISE CONNECTOR

Fair

Over: PARADISE RIVER

16 MILES NORTHEAST OF NIS, Lewis, WA

Built 1926 Load: 13.6 t ADT: 1,500

LINCOLN CREEK RD

Fair

Over: LINCOLN CREEK

9.0 NW CENTRALIA, Lewis, WA

Built 1977 Load: 14.5 t ADT: 266

NO DATA ENTERED

Fair

Over: CISPUS RIVER

9 MILES SOUTH OF HWY 12 J, Lewis, WA

Built 1955 Load: 14.9 t ADT: 650

WILDWOOD ROAD

Fair

Over: STILLWATER CREEK

0.04 NW JCT SR 506, Lewis, WA

Built 1962 Load: 14.9 t ADT: 239

SR 6

Fair

Over: ROCK CR NP RY-ABANDONED

0.4 E PACIFIC CO, Lewis, WA

Built 1930 Load: 15.6 t ADT: 1,561

YEW ST

Fair

Over: CHINA CREEK

.3 N JCT. SR 507, Lewis, WA

Built 1944 Load: 16.3 t ADT: 4,563

TEAGUE ROAD

Fair

Over: LINCOLN CREEK

5.0 W CENTRALIA, Lewis, WA

Built 1964 Load: 16.5 t ADT: 43

SR 6

Fair

Over: CHEHALIS R

3.4 E PACIFIC CO, Lewis, WA

Built 1931 Load: 16.8 t ADT: 1,801

US 12

Fair

Over: GULCH

6.2 E JCT SR 123, Lewis, WA

Built 1949 Load: 17.2 t ADT: 1,729

RUSH ROAD

Fair

Over: NEWAUKUM RIVER

0.10 N JCT 40028, Lewis, WA

Built 1953 Load: 17.2 t ADT: 5,801

HENDRICKSON ROAD

Fair

Over: STILLWATER CREEK

2.0 W VADER, Lewis, WA

Built 1927 Load: 17.2 t ADT: 78

HOLOCOMB ROAD

Fair

Over: Stearns Creek

2.3 West Napavine, Lewis, WA

Built 1940 Load: 17.2 t ADT: 163

STEVENS CANYON ROA

Fair

Over: RAVINE

12.6 MILES WEST OF JCT. U, Lewis, WA

Built 1955 Load: 17.2 t ADT: 1,500

I-5

Fair

Over: CW RY

6.5 N JCT SR 508, Lewis, WA

Built 1953 Load: 17.5 t ADT: 72,086

NO DATA ENTERED

Fair

Over: BIG CREEK

0.1 MILE SOUTH OF JCT BS, Lewis, WA

Built 1958 Load: 17.5 t ADT: 16

LEONARD ROAD

Fair

Over: LACAMAS CREEK

0.63 N JCT SR 12, Lewis, WA

Built 1962 Load: 18.1 t ADT: 1,725

MIDDLE FORK RD.

Fair

Over: S. FORK NEWAUKUM RIVER

0.4 E JCT 94000, Lewis, WA

Built 1956 Load: 18.1 t ADT: 1,424

STEVENS CANYON ROA

Fair

Over: MUDDY FORK

10.3 miles west of jct. U, Lewis, WA

Built 1952 Load: 18.1 t ADT: 1,375

CAMPGROUND ROAD

Fair

Over: OHANAPECOSH RIVER

0.5 MILES NORTHWEST OF JC, Lewis, WA

Built 1960 Load: 18.1 t ADT: 1,375

STEVENS CANYON ROA

Fair

Over: RAVINE

12.0 MILES WEST OF JCT. U, Lewis, WA

Built 1952 Load: 18.1 t ADT: 1,500

CENTRALIA ALPHA RD

Fair

Over: NO.FK NEWAUKUM RIVER

0.04 SE JCT 46000, Lewis, WA

Built 1960 Load: 19.0 t ADT: 839

NORTH FORK RD.

Fair

Over: S. FORK NEWAUKUM RIVER

0.34 NE 94000, Lewis, WA

Built 1958 Load: 19.0 t ADT: 1,493

BOISTFORT RD.

Fair

Over: S.FORK CHEHALIS RIVER

1.08 S SR 6, Lewis, WA

Built 1958 Load: 19.0 t ADT: 686

WALNUT ST

Fair

Over: CHINA CREEK

.4 N JCT. SR 507, Lewis, WA

Built 1946 Load: 19.0 t

OAK ST

Fair

Over: CHINA CREEK

.1 S JCT. FAS1027, Lewis, WA

Built 1941 Load: 19.0 t ADT: 209

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

Related

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