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.
Fair-condition bridges (238)
WILDWOOD ROAD
FairOver: S.FORK CHEHALIS RIVER
11.5 S CURTIS, Lewis, WA
Built 1970 Load: 31.7 t ADT: 174
NO DATA ENTERED
FairOver: LITTLE NISQUALLY RIVER
12.3 MILES WEST OF HWY 7, Lewis, WA
Built 1971 Load: 31.8 t ADT: 30
NO DATA ENTERED
FairOver: GREENHORN CREEK
10.6 MILES SOUTHEAST OF H, Lewis, WA
Built 1954 Load: 32.4 t ADT: 98
SR 507 & PEARL ST
FairOver: CHINA CRK
0.7 S JCT SR 507, Lewis, WA
Built 1918 Load: 32.7 t ADT: 5,686
SR 508
FairOver: CREEK
24.1 E JCT I-5, Lewis, WA
Built 1937 Load: 32.7 t ADT: 1,171
US 12
FairOver: I-5
JCT I-5, Lewis, WA
Built 1958 Load: 32.7 t ADT: 7,890
US 12
FairOver: RAINEY CREEK OVERFLOW
10.4 E JCT SR 7, Lewis, WA
Built 1964 Load: 32.7 t ADT: 4,752
I-5
FairOver: SKOOKUMCHUCK RIVER
0.7 N JCT SR 507, Lewis, WA
Built 1951 Load: 32.7 t ADT: 24,794
I-5
FairOver: SKOOKUMCHUCK RIVER
0.7 N JCT SR 507, Lewis, WA
Built 1951 Load: 32.7 t ADT: 24,794
US 12
FairOver: CORTRIGHT CREEK
1.7 E JCT SR 123, Lewis, WA
Built 1983 Load: 32.7 t ADT: 1,590
STOWELL ROAD
FairOver: MILL CREEK
1.5 N SALKUM, Lewis, WA
Built 1960 Load: 32.7 t ADT: 332
ROCK CREEK RD
FairOver: ROCK CR.
2.5 SW PE ELL, Lewis, WA
Built 1985 Load: 32.7 t ADT: 17
PIGEON SPRINGS RD
FairOver: BERNIER CREEK
6.0 NE ONALASKA, Lewis, WA
Built 1954 Load: 32.7 t ADT: 35
PE ELL MCDONALD RD
FairOver: HALFWAY CREEK
7.33 E PE ELL, Lewis, WA
Built 1956 Load: 32.7 t ADT: 280
CURTIS HILL RD.
FairOver: LAKE CR.
3. SW ADNA, Lewis, WA
Built 1960 Load: 32.7 t ADT: 642
KING ROAD
FairOver: LAKE CREEK
0.62 E JCT 92006, Lewis, WA
Built 1960 Load: 32.7 t ADT: 148
OSBORN ROAD
FairOver: BIG CREEK
11.0 E ELBE, Lewis, WA
Built 1968 Load: 32.7 t ADT: 301
HWY 603
FairOver: CHEHALIS RIVER
0.15 S.E. SR 6, Lewis, WA
Built 1991 Load: 32.7 t ADT: 1,697
BERRY ROAD
FairOver: STEARNS CREEK
4.0 W NAPAVINE, Lewis, WA
Built 1994 Load: 32.7 t ADT: 20
GUERRIER ROAD
FairOver: S FK NEWAUKUM RIVER
2.0 SE FOREST, Lewis, WA
Built 1996 Load: 32.7 t ADT: 261
FALLS ROAD
FairOver: LAMBERT CREEK
8.19 SW RANDLE, Lewis, WA
Built 2004 Load: 32.7 t ADT: 99
NO DATA ENTERED
FairOver: WALUPT CREEK
16.5 MILES SE OF HWY 12 (, Lewis, WA
Built 1965 Load: 33.6 t ADT: 69
ELK CREEK RD.
FairOver: DEER CREEK
0.6 W DOTY, Lewis, WA
Built 1952 Load: 33.6 t ADT: 202
PE ELL MCDONALD RD
FairOver: HALFWAY CREEK
6.4 E PE ELL, Lewis, WA
Built 1958 Load: 33.6 t ADT: 229
CENTRALIA ALPHA RD
FairOver: SALZER CR.
1. SE.CENTRALIA, Lewis, WA
Built 1983 Load: 33.6 t ADT: 1,732
NICHOLSON ROAD
FairOver: LACAMAS CREEK
0.45 N JCT. 56000, Lewis, WA
Built 1972 Load: 33.6 t ADT: 98
BEAM RD.
FairOver: JONES CR.
0.41 E JCT SR.6, Lewis, WA
Built 1972 Load: 33.6 t ADT: 23
TOOLEY ROAD
FairOver: SALMON CREEK
2.0 SE TOLEDO, Lewis, WA
Built 1977 Load: 33.6 t ADT: 103
PEAR ST
FairOver: CHINA CREEK
.3 N JCT. SR 507, Lewis, WA
Built 1942 Load: 33.6 t ADT: 1,270
TAYLOR ROAD
FairOver: BRANCH NEWAUKUM RIVER
2.5 NE NAPAVINE, Lewis, WA
Built 1954 Load: 34.5 t ADT: 80
BUNKER ROAD
FairOver: BUNKER CREEK
9.0 NW ADNA, Lewis, WA
Built 1955 Load: 34.5 t ADT: 25
TOLEDO SALMON CRK
FairOver: SALMON CREEK
1.39 SE JCT 50850, Lewis, WA
Built 1977 Load: 34.5 t ADT: 31
BIG HANAFORD RD.
FairOver: HANAFORD CR.
7. NE CENTRALIA, Lewis, WA
Built 1955 Load: 34.5 t ADT: 189
NO DATA ENTERED
FairOver: WINSTON CREEK
ABOUT 16 MILES SOUTHWEST, Lewis, WA
Built 1992 Load: 34.7 t ADT: 18
CISPUS RD.
FairOver: SILER CR.
0.03 NW RD 70301, Lewis, WA
Built 1952 Load: 35.3 t ADT: 254
NO DATA ENTERED
FairOver: PINTO CREEK
ABOUT 10 MILES SOUTH OF H, Lewis, WA
Built 1954 Load: 35.4 t ADT: 59
BLANCHARD ROAD
FairOver: SCAMMON CREEK
1.0 SW CENTRALIA, Lewis, WA
Built 1955 Load: 35.4 t ADT: 173
SKATE CREEK ROAD
FairOver: COWLITZ OVERFLOW
0.5 NW PACKWOOD, Lewis, WA
Built 1955 Load: 35.4 t ADT: 1,359
MAGNUS RD
FairOver: KEARNEY CR
9.0 E ONALASKA, Lewis, WA
Built 1985 Load: 35.4 t ADT: 36
HOWE ROAD
FairOver: SKOOK CREEK
4.9 NW TOLEDO, Lewis, WA
Built 2003 Load: 35.4 t ADT: 40
NO DATA ENTERED
FairOver: NORTH FORK CISPUS RIVER
11 1/2 MILES SOUTH OF RAN, Lewis, WA
Built 1956 Load: 35.8 t ADT: 96
SR 6
FairOver: CHEHALIS RIVER
21.9 E PACIFIC CO, Lewis, WA
Built 1971 Load: 36.3 t ADT: 7,052
I-5
FairOver: HARRISON AVE
1.1 N JCT SR 507, Lewis, WA
Built 1972 Load: 36.3 t ADT: 49,588
NO DATA ENTERED
FairOver: SMITH CREEK
4.3 MILES SE OF JCT HWY 1, Lewis, WA
Built 1969 Load: 36.3 t ADT: 20
NORTH FORK RD
FairOver: N.FORK NEWAUKUM RIVER
4.5 NE FOREST, Lewis, WA
Built 1980 Load: 36.3 t ADT: 441
TWIN OAKS ROAD
FairOver: STEARNS CR.
2.5 SW CHEHALIS, Lewis, WA
Built 1979 Load: 36.3 t ADT: 923
MINKLER ROAD
FairOver: OLEQUA CREEK
1.0 W ST. URBAN, Lewis, WA
Built 1951 Load: 36.3 t ADT: 691
US 12
FairOver: COWLITZ RIVER
7.8 E JCT SR 131, Lewis, WA
Built 1948 Load: 37.2 t ADT: 2,648
NO DATA ENTERED
FairOver: YELLOWJACKET CREEK
RANDLE TO 25 23 28 RD., Lewis, WA
Built 1976 Load: 37.2 t ADT: 437
PLEASANT VALLEY RD
FairOver: EAST CREEK
0.3 W JCT SR 7, Lewis, WA
Built 1976 Load: 37.2 t ADT: 189
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.