Cowlitz County, WA

167 public highway bridges

Cowlitz County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Cowlitz County, Washington contains 167 public highway bridges. Roughly 35.9% are rated “Good,” 40.7% “Fair,” and 3.6% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

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

167
Total Bridges
35.9%
Good
40.7%
Fair
3.6%
Poor Condition

Condition Distribution

Good
35.9% (60)
Fair
40.7% (68)
Poor
3.6% (6)

All Bridges (167)

GROWLERS GULCH RD

Good

Over: ARKANSAS CREEK

0.27 W PH 10 (MP 2.83), Cowlitz, WA

Built 1953 Load: 55.3 t ADT: 134

SR 4

Good

Over: MILL CREEK

2.0 E WAHKIAKUM CO, Cowlitz, WA

Built 1963 Load: 57.1 t ADT: 3,892

DUNCAN RD

Good

Over: OWL CREEK

0.30 E FISHPOND (MP 1.88), Cowlitz, WA

Built 2003 Load: 58.0 t ADT: 75

SR 504

Good

Over: COLDWATER CR

24.0 E JCT SR 504 SP, Cowlitz, WA

Built 1994 Load: 72.6 t ADT: 586

SR 504

Good

Over: WOOSTER CREEK

2.3 E JCT SR 505, Cowlitz, WA

Built 2018 Load: 74.5 t ADT: 956

I-5

Good

Over: KALAMA RIVER

10.8 N JCT SR 503, Cowlitz, WA

Built 1970 Load: 76.5 t ADT: 36,886

I-5

Good

Over: KALAMA RIVER

10.8 N JCT SR 503, Cowlitz, WA

Built 1971 Load: 89.8 t ADT: 36,886

SR 432

Good

Over: SOLO SLOUGH

2.8 E JCT SR 4, Cowlitz, WA

Built 1961 Load: 89.8 t ADT: 6,426

DELAMETER RD

Good

Over: MONAHAN CREEK

2.74 W SR411 (MP11.33), Cowlitz, WA

Built 2003 Load: 96.9 t ADT: 750

ROSE VALLEY ROAD

Good

Over: TURNER CREEK

3.78 E OLD 99 S (MP 1.06), Cowlitz, WA

Built 2020 Load: 96.9 t ADT: 1,800

QUICK RD

Good

Over: WHITTLE CREEK

0.63 W WSH (MP 0.90), Cowlitz, WA

Built 1999 Load: 99.9 t ADT: 130

SR 503

Poor

Over: JIM CREEK

8.2 N JCT SR 503 SPUR, Cowlitz, WA

Built 1945 Load: 14.3 t ADT: 1,921

SR 504

Poor

Over: N FK TOUTLE RIVER

2.6 E JCT SR 505, Cowlitz, WA

Built 1965 Load: 19.0 t ADT: 956

MILL CREEK RD

Poor

Over: MILL CREEK

0.19 N OF SR 4 (MP 47.64), Cowlitz, WA

Built 1958 Load: 20.0 t ADT: 700

OLD 99 SOUTH

Poor

Over: OWL CREEK

1.00 S KELSO DR (LV WYE), Cowlitz, WA

Built 1922 Load: 20.9 t ADT: 6,500

SR 411

Poor

Over: COWLITZ RIVER

12.4 N JCT SR 432, Cowlitz, WA

Built 1963 Load: 36.3 t ADT: 6,550

I-5

Poor

Over: LOG DUMP RD & BN RY

1.6 N JCT SR 503, Cowlitz, WA

Built 1972 Load: 38.1 t ADT: 33,715

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.