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)

NO DATA ENTERED

Good

Over: ORR CREEK

NO DATA ENTERED, Lewis, WA

Built 1985 Load: 73.5 t ADT: 50

THIRD STREET

Good

Over: STOWE CREEK

2.5 BLKS S SR 6, Lewis, WA

Built 1994 Load: 74.2 t ADT: 600

SR 6

Good

Over: FRONIA CREEK

6.5 E PACIFIC CO, Lewis, WA

Built 2019 Load: 79.4 t ADT: 2,463

SB I-5 RAMP

Good

Over: DILLENBAUGH CREEK

3.8 N JCT SR 508, Lewis, WA

Built 2009 Load: 84.4 t ADT: 2,702

ANNONEN RD

Good

Over: OLEQUA CK

1.0 n vader, Lewis, WA

Built 2002 Load: 86.2 t ADT: 47

SR 123

Good

Over: SUMMIT CRK

0.6 N JCT US 12, Lewis, WA

Built 1986 Load: 89.8 t ADT: 1,074

PATTEE ROAD

Good

Over: BERWICK CREEK

5 W CHEHALIS, Lewis, WA

Built 2007 Load: 89.8 t ADT: 52

STEVENS CANYON ROA

Good

Over: NICKEL CREEK

9.8 MILES WEST OF JCT. U., Lewis, WA

Built 1952 Load: 99.9 t ADT: 1,375

NFSR 7003000

Poor

Over: EAGLE CREEK

ROAD 70 OFF HWY 7, Lewis, WA

Built 1970 ADT: 50

CERES HILL ROAD

Poor

Over: CHEHALIS RIVER

6.0 W ADNA, Lewis, WA

Built 1948 Load: 8.1 t ADT: 144

CHAMBER WAY

Poor

Over: BN RR & N NAT'L AVE

0.1 E OF INTERSTATE 5, Lewis, WA

Built 1952 Load: 12.7 t ADT: 13,223

DAVISON RD.

Poor

Over: TILTON RIVER

1.75 W MORTON, Lewis, WA

Built 1924 Load: 13.6 t ADT: 117

US 12

Poor

Over: PURCELL CREEK

22.2 E JCT SR 131, Lewis, WA

Built 1971 Load: 21.1 t ADT: 2,360

SR 507

Poor

Over: SKOOKUMCHUCK RIVER

2.4 N JCT I-5, Lewis, WA

Built 1928 Load: 22.7 t ADT: 8,699

STEVENS CANYON ROA

Poor

Over: RAVINE

5.5 miles southwest of jc, Lewis, WA

Built 1952 Load: 31.7 t ADT: 1,375

NFSR 7003000

Structurally Deficient

Over: WEST FORK TILTON

TAKE ROAD 70 OFF HWY 7, Lewis, WA

Built 1970 ADT: 50

SR 7

Structurally Deficient

Over: S FK TILTON RIVER

2.8 N JCT SR 508, Lewis, WA

Built 1938 Load: 16.5 t ADT: 2,576

SR 7

Structurally Deficient

Over: ABANDONED RAILROAD

2.0 N JCT SR 508, Lewis, WA

Built 1944 Load: 17.8 t ADT: 2,576

I-5

Structurally Deficient

Over: LACAMAS CR, DREWS PR RD

0.4 N JCT SR 506, Lewis, WA

Built 1953 Load: 17.8 t ADT: 41,665

US 12

Structurally Deficient

Over: COAL CREEK

20.2 E JCT SR 131, Lewis, WA

Built 1930 Load: 27.2 t ADT: 2,401

SR 7

Structurally Deficient

Over: TILTON RIVER

4.1 N JCT SR 508, Lewis, WA

Built 1931 Load: 36.3 t ADT: 2,307

US 12

Structurally Deficient

Over: CLEAR FK OF COWLITZ R

23.1 E JCT SR 131, Lewis, WA

Built 1972 Load: 51.7 t ADT: 2,360

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