Total bridges
419
Public highway bridges in Lewis County
County profile · official public datasets
Lewis County, WA
419 public highway bridges tracked in the FHWA National Bridge Inventory: 39.4% rated Good, 56.8% Fair, 3.8% Poor.
- 419
- Public bridges
- 39.4%
- Good condition
- 3.8%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Lewis County pairs a better-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- Top 26%
- lowest Poor share in state
- 3.8%
- Poor-condition share
- 419
- public highway bridges
- 1969
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Lewis County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Lewis County ranks #10 of 39 Washington counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.8%). Lewis County, Washington contains 419 public highway bridges. Roughly 39.4% are rated “Good,” 56.8% “Fair,” and 3.8% “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.
Good condition
39.4%
165 of 419 rated 7-9
Fair condition
56.8%
238 of 419 rated 5-6
Poor condition
3.8%
16 of 419 rated 4 or below
In-state Poor-share rank
#10 of 39
Among Washington counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 419 NBI-tracked bridges by lowest applicable component rating.
Good 39.4% (165)
Fair 56.8% (238)
Poor 3.8% (16)
Lewis County's Poor-condition bridges carry 102,118 vehicle crossings a day
That is 7.3% of the county's reported daily bridge traffic on 3.8% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 6,382 crossings a day against 2,418 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 418 of 419 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
64.7% of Lewis County's bridges have passed the 50-year mark
271 of the 419 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 39.4% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 40.8% of the county's Poor-condition bridge traffic
I-5 over LACAMAS CR DREWS PR RD, built 1953, carries 41,665 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 16-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 102,118 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Lewis County's bridges were built
419 bridges with a recorded construction year, grouped by decade
- 1910s 2
1910–1919
2 bridges
- 1920s 21
1920–1929
21 bridges
- 1930s 17
1930–1939
17 bridges
- 1940s 29
1940–1949
29 bridges
- 1950s
1950–1959
108 bridges
- 1960s
1960–1969
64 bridges
- 1970s
1970–1979
57 bridges
- 1980s 27
1980–1989
27 bridges
- 1990s 26
1990–1999
26 bridges
- 2000s 26
2000–2009
26 bridges
- 2010s 29
2010–2019
29 bridges
- 2020s 13
2020–2029
13 bridges
What this shows Construction peaked in the 1950s, when 108 of the county's bridges still in the inventory were built, which is 25.8% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1969, 6 years older than the Washington average of 1975.
How Lewis County compares with Washington's closest counties by inventory size
The 5 Washington counties nearest Lewis County in number of bridges, with their condition splits. Its 3.8% Poor share is the 2nd-lowest of these 6. Its average build year of 1969 against a peer-group mean of 1975 is 6 years older.
Showing the 5 closest of 38 Washington counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Snohomish County | 500 | 49% | 47% | 4% | 1980 |
| Pierce County | 472 | 55.3% | 40.5% | 4.2% | 1974 |
| Lewis County (this page) | 419 | 39.4% | 56.8% | 3.8% | 1969 |
| Grays Harbor County | 363 | 48.8% | 41.9% | 9.4% | 1978 |
| Whatcom County | 354 | 44.1% | 50.6% | 5.4% | 1970 |
| Whitman County | 347 | 52.2% | 44.4% | 3.5% | 1974 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Lewis County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Lewis County, both outside Washington so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside WA (419 bridges here).
- Kay County, OK · 419 bridges
- Taylor County, TX · 419 bridges
- Santa Barbara County, CA · 418 bridges
- Lucas County, OH · 418 bridges
Similar average build year
Nearest mean year-built outside WA (1969 here).
- Cook County, IL · avg 1969 · 1,721 bridges
- Fresno County, CA · avg 1969 · 916 bridges
- Cuyahoga County, OH · avg 1969 · 871 bridges
- Ventura County, CA · avg 1969 · 501 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (419)
US 12
FairOver: SLIDE AREA
5.0 E JCT SR 123, Lewis, WA
Built 1968 Load: 12.6 t ADT: 1,729
JACKSON HWY
FairOver: LAUSSIER CR.
4.36 S JCT US 12, Lewis, WA
Built 1926 Load: 13.6 t ADT: 932
NE EXHIBITOR RD.
FairOver: SALZER CREEK
0.1 W OF NE KRESKY, Lewis, WA
Built 1971 Load: 13.6 t ADT: 1,951
N NATIONAL AVE
FairOver: SALZER CREEK
0.1 N OF NE HAMPE, Lewis, WA
Built 1936 Load: 13.6 t ADT: 8,038
RIVERSIDE DR
FairOver: DILLENBAUGH CREEK
RIVERSIDE DRIVE, Lewis, WA
Built 1952 Load: 13.6 t ADT: 3,910
PARADISE CONNECTOR
FairOver: PARADISE RIVER
16 MILES NORTHEAST OF NIS, Lewis, WA
Built 1926 Load: 13.6 t ADT: 1,500
LINCOLN CREEK RD
FairOver: LINCOLN CREEK
9.0 NW CENTRALIA, Lewis, WA
Built 1977 Load: 14.5 t ADT: 266
NO DATA ENTERED
FairOver: CISPUS RIVER
9 MILES SOUTH OF HWY 12 J, Lewis, WA
Built 1955 Load: 14.9 t ADT: 650
WILDWOOD ROAD
FairOver: STILLWATER CREEK
0.04 NW JCT SR 506, Lewis, WA
Built 1962 Load: 14.9 t ADT: 239
SR 6
FairOver: ROCK CR NP RY-ABANDONED
0.4 E PACIFIC CO, Lewis, WA
Built 1930 Load: 15.6 t ADT: 1,561
YEW ST
FairOver: CHINA CREEK
.3 N JCT. SR 507, Lewis, WA
Built 1944 Load: 16.3 t ADT: 4,563
TEAGUE ROAD
FairOver: LINCOLN CREEK
5.0 W CENTRALIA, Lewis, WA
Built 1964 Load: 16.5 t ADT: 43
SR 6
FairOver: CHEHALIS R
3.4 E PACIFIC CO, Lewis, WA
Built 1931 Load: 16.8 t ADT: 1,801
US 12
FairOver: GULCH
6.2 E JCT SR 123, Lewis, WA
Built 1949 Load: 17.2 t ADT: 1,729
RUSH ROAD
FairOver: NEWAUKUM RIVER
0.10 N JCT 40028, Lewis, WA
Built 1953 Load: 17.2 t ADT: 5,801
HENDRICKSON ROAD
FairOver: STILLWATER CREEK
2.0 W VADER, Lewis, WA
Built 1927 Load: 17.2 t ADT: 78
HOLOCOMB ROAD
FairOver: Stearns Creek
2.3 West Napavine, Lewis, WA
Built 1940 Load: 17.2 t ADT: 163
STEVENS CANYON ROA
FairOver: RAVINE
12.6 MILES WEST OF JCT. U, Lewis, WA
Built 1955 Load: 17.2 t ADT: 1,500
I-5
FairOver: CW RY
6.5 N JCT SR 508, Lewis, WA
Built 1953 Load: 17.5 t ADT: 72,086
NO DATA ENTERED
FairOver: BIG CREEK
0.1 MILE SOUTH OF JCT BS, Lewis, WA
Built 1958 Load: 17.5 t ADT: 16
LEONARD ROAD
FairOver: LACAMAS CREEK
0.63 N JCT SR 12, Lewis, WA
Built 1962 Load: 18.1 t ADT: 1,725
MIDDLE FORK RD.
FairOver: S. FORK NEWAUKUM RIVER
0.4 E JCT 94000, Lewis, WA
Built 1956 Load: 18.1 t ADT: 1,424
STEVENS CANYON ROA
FairOver: MUDDY FORK
10.3 miles west of jct. U, Lewis, WA
Built 1952 Load: 18.1 t ADT: 1,375
CAMPGROUND ROAD
FairOver: OHANAPECOSH RIVER
0.5 MILES NORTHWEST OF JC, Lewis, WA
Built 1960 Load: 18.1 t ADT: 1,375
STEVENS CANYON ROA
FairOver: RAVINE
12.0 MILES WEST OF JCT. U, Lewis, WA
Built 1952 Load: 18.1 t ADT: 1,500
SR 505
FairOver: I-5
JCT I-5, Lewis, WA
Built 1954 Load: 18.5 t ADT: 4,389
CENTRALIA ALPHA RD
FairOver: NO.FK NEWAUKUM RIVER
0.04 SE JCT 46000, Lewis, WA
Built 1960 Load: 19.0 t ADT: 839
NORTH FORK RD.
FairOver: S. FORK NEWAUKUM RIVER
0.34 NE 94000, Lewis, WA
Built 1958 Load: 19.0 t ADT: 1,493
BOISTFORT RD.
FairOver: S.FORK CHEHALIS RIVER
1.08 S SR 6, Lewis, WA
Built 1958 Load: 19.0 t ADT: 686
WALNUT ST
FairOver: CHINA CREEK
.4 N JCT. SR 507, Lewis, WA
Built 1946 Load: 19.0 t
OAK ST
FairOver: CHINA CREEK
.1 S JCT. FAS1027, Lewis, WA
Built 1941 Load: 19.0 t ADT: 209
MAGONLIA ST
FairOver: CHINA CREEK
00.05 W JCT SR 507, Lewis, WA
Built 1941 Load: 19.0 t ADT: 149
STEVENS CANYON ROA
FairOver: STEVENS CREEK
14.1 MILES WEST OF JCT. U, Lewis, WA
Built 1940 Load: 19.0 t ADT: 1,500
STEVENS CANYON ROA
FairOver: OHANAPECOSH RIVER
0.2 MILES NORTHWEST OF JC, Lewis, WA
Built 1956 Load: 19.0 t ADT: 1,375
WEST ST
FairOver: I-5
0.4 N JCT SR 6, Lewis, WA
Built 1953 Load: 19.1 t ADT: 2,641
NO DATA ENTERED
FairOver: IRON CREEK
10 MILES SOUTH OF JUNCTIO, Lewis, WA
Built 1976 Load: 19.1 t ADT: 98
I-5
FairOver: NEWAUKUM RIVER
1.2 N JCT SR 508, Lewis, WA
Built 1952 Load: 19.4 t ADT: 28,783
I-5
FairOver: NEWAUKUM RIVER
1.2 N JCT SR 508, Lewis, WA
Built 1952 Load: 19.4 t ADT: 28,783
US 12
FairOver: CORN CREEK
2.4 E JCT SR 122, Lewis, WA
Built 1967 Load: 19.8 t ADT: 4,729
TEITZEL ROAD
FairOver: S HANAFORD CREEK
4.0 E CENTRALIA, Lewis, WA
Built 1966 Load: 20.0 t ADT: 110
PE ELL MCDONALD RD
FairOver: STILLMAN CREEK
0.7 W JCT 92004, Lewis, WA
Built 1959 Load: 20.0 t ADT: 235
WILDWOOD ROAD
FairOver: SO. FORK CHEHALIS RIVER
11.0 S CURTIS, Lewis, WA
Built 1955 Load: 20.0 t ADT: 191
STEVENS CANYON ROA
FairOver: RAVINE
12.5 MILES WEST OF JCT. U, Lewis, WA
Built 1952 Load: 20.0 t ADT: 1,500
US 12
FairOver: SILVER CREEK
1.0 E JCT SR 122, Lewis, WA
Built 2003 Load: 20.4 t ADT: 6,630
THOMPSON ROAD
FairOver: LAKE CREEK
1.0 NE PACKWOOD, Lewis, WA
Built 1936 Load: 20.9 t ADT: 12
PETERS RD.
FairOver: KIONA CR.
1.13 S JCT SR 12, Lewis, WA
Built 1964 Load: 20.9 t ADT: 244
HADALLER ROAD
FairOver: WINSTON CREEK
5.0 W MOSSYROCK, Lewis, WA
Built 1961 Load: 20.9 t ADT: 438
FAS 1196
FairOver: CHEHALIS RIVER
.1 W JCT I-5, Lewis, WA
Built 1959 Load: 20.9 t ADT: 10,684
LOCUST ST
FairOver: CHINA CREEK
.3 N JCT. SR 507, Lewis, WA
Built 1941 Load: 20.9 t ADT: 1,362
WEST REYNOLDS AVE
FairOver: COFFEE CREEK
NE CENTRALIA, Lewis, WA
Built 1955 Load: 20.9 t ADT: 10,213
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.