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)
13TH ST RICE
FairOver: I-5
5.5 N JCT SR 508, Lewis, WA
Built 1958 Load: 27.2 t ADT: 5,901
I-5
FairOver: DILLENBAUGH CREEK
6.8 N JCT SR 508, Lewis, WA
Built 1952 Load: 27.2 t ADT: 65,022
I-5
FairOver: NP RY & DILLENBAUGH CR
6.1 N JCT SR 508, Lewis, WA
Built 1954 Load: 27.2 t ADT: 72,086
NO DATA ENTERED
FairOver: CISPUS RIVER
16 1/2 MILES SE OF JCT. H, Lewis, WA
Built 1958 Load: 27.2 t ADT: 69
ELK CREEK RD.
FairOver: ELK CREEK
0.85 W 27092, Lewis, WA
Built 1951 Load: 27.2 t ADT: 325
SR 131
FairOver: COWLITZ RIVER
1.8 N JCT NATL FOREST BD, Lewis, WA
Built 1949 Load: 27.2 t ADT: 1,096
AIRPORT ROAD
FairOver: SALZER CREEK
0.5 NW CHEHALIS, Lewis, WA
Built 1952 Load: 27.2 t ADT: 7,230
SCHMIT ROAD
FairOver: CEDAR CREEK
6.0 E TOLEDO, Lewis, WA
Built 1953 Load: 27.2 t ADT: 10
WILDWOOD ROAD
FairOver: S.FORK CHEHALIS RIVER
3.0 S BOISTFORT, Lewis, WA
Built 1955 Load: 27.2 t ADT: 284
HINING ROAD
FairOver: OLEQUA CREEK
S. C/L WINLOCK, Lewis, WA
Built 1957 Load: 27.2 t ADT: 29
MANDY ROAD
FairOver: FOSTER CREEK
3.0 SW TOLEDO, Lewis, WA
Built 1953 Load: 27.2 t ADT: 142
FAS 1027
FairOver: CHINA CREEK
1.1 E. END FAS1027, Lewis, WA
Built 1911 Load: 27.2 t ADT: 8,788
KELSO STREET
FairOver: STOWE CREEK
0.5 BLK E MAIN ST, Lewis, WA
Built 1950 Load: 27.2 t ADT: 355
STEVENS CANYON ROA
FairOver: FALLS CREEK
0.48 MILES WEST OF JCT. U, Lewis, WA
Built 1956 Load: 27.2 t ADT: 1,375
US 12
FairOver: SURREY CREEK
2.5 E JCT SR 131, Lewis, WA
Built 1958 Load: 27.9 t ADT: 2,648
JACKSON HWY SOUTH
FairOver: SALMON CREEK
1.0 S. S.R. 505, Lewis, WA
Built 1923 Load: 27.9 t ADT: 1,368
SR 508
FairOver: TILTON RIVER
32.4 E JCT I-5, Lewis, WA
Built 1947 Load: 28.1 t ADT: 2,178
GALVIN RD.
FairOver: CHEHALIS RIVER
1.5 W CENTRALIA, Lewis, WA
Built 1969 Load: 28.1 t ADT: 1,941
HARRISON AVE.
FairOver: DRY CREEK
1.0 N CENTRALIA, Lewis, WA
Built 1926 Load: 28.1 t ADT: 9,304
CINEBAR ROAD
FairOver: MILL CR.
1.33 S SR. 508, Lewis, WA
Built 1975 Load: 28.1 t ADT: 482
SALMON CREEK RD
FairOver: WINSTON CR.
0.19 S JCT 60073, Lewis, WA
Built 1953 Load: 28.1 t ADT: 192
NO DATA ENTERED
FairOver: SKATE CREEK
4.2 MILES NW OF HWY 12 ON, Lewis, WA
Built 2010 Load: 28.2 t ADT: 50
SR 508
FairOver: MILL CREEK
18.3 E JCT I-5, Lewis, WA
Built 1937 Load: 29.0 t ADT: 1,171
I-5
FairOver: RUSH RD
1.7 N JCT SR 508, Lewis, WA
Built 1953 Load: 29.0 t ADT: 25,678
I-5
FairOver: RUSH RD
1.7 N JCT SR 508, Lewis, WA
Built 1953 Load: 29.0 t ADT: 25,678
BUNKER CREEK RD
FairOver: BUNKER CR.
6.5 W CHEHALIS, Lewis, WA
Built 1983 Load: 29.0 t ADT: 676
BOISTFORT RD.
FairOver: S.FORK CHEHALIS RIVER
8.0 SW CHEHALIS, Lewis, WA
Built 1982 Load: 29.0 t ADT: 847
BUNKER CREEK RD
FairOver: DEEP CR.
6.5 W CHEHALIS, Lewis, WA
Built 1983 Load: 29.0 t ADT: 676
SILVERBROOK ROAD
FairOver: SURREY CREEK
2.5 E RANDLE, Lewis, WA
Built 1975 Load: 29.0 t ADT: 95
TUCKER RD.
FairOver: LACAMAS CR.
0.01 S SR 12, Lewis, WA
Built 1974 Load: 29.0 t ADT: 1,205
TAUSCHER ROAD
FairOver: N FK NEWAUKUM RIVER
2.0 E FOREST, Lewis, WA
Built 1991 Load: 29.0 t ADT: 270
KRUGER ROAD
FairOver: MID FK NEWAUKUM RIVER
2.0 N ONALASKA, Lewis, WA
Built 1950 Load: 29.0 t ADT: 248
COUGHLIN ROAD
FairOver: S FK NEWAUKUM RIVER
1.0 E ONALASKA, Lewis, WA
Built 1922 Load: 29.0 t ADT: 27
TEMPLE ROAD
FairOver: DAVIS CREEK
1.0 SE MORTON, Lewis, WA
Built 1990 Load: 29.0 t ADT: 53
NO DATA ENTERED
FairOver: NORTH FORK CISPUS RIVER
12 MILES SE OF RANDLE (MP, Lewis, WA
Built 1951 Load: 29.1 t ADT: 372
US 12
FairOver: LAKE CREEK
10.0 E JCT SR 122, Lewis, WA
Built 1966 Load: 29.2 t ADT: 4,729
SR 508
FairOver: KEARNEY CREEK
16.0 E JCT I-5, Lewis, WA
Built 1937 Load: 29.9 t ADT: 1,672
SR 508
FairOver: ALDER CREEK
22.7 E JCT I-5, Lewis, WA
Built 1937 Load: 29.9 t ADT: 1,171
SR 7
FairOver: NISQUALLY RIVER
16.3 N JCT SR 508, Lewis, WA
Built 1953 Load: 29.9 t ADT: 2,818
MINERAL CREEK ROAD
FairOver: ROUNDTOP CREEK
0.5 E MINERAL, Lewis, WA
Built 1967 Load: 29.9 t ADT: 364
LECH ROAD
FairOver: JONES CREEK
1.0 NE PE ELL, Lewis, WA
Built 1953 Load: 29.9 t ADT: 14
BIG HANAFORD RD.
FairOver: SOUTH HANAFORD CR.
5. E CENTRALIA, Lewis, WA
Built 1974 Load: 29.9 t ADT: 561
INGALLS RD.
FairOver: LINCOLN CR.
2.10 N JCT 24034, Lewis, WA
Built 1953 Load: 30.1 t ADT: 248
US 12
FairOver: COWLITZ R
0.8 E JCT SR 122, Lewis, WA
Built 1968 Load: 30.8 t ADT: 4,729
SHOREY RD
FairOver: RAIL ROAD DITCH
0.11 S RD 40073, Lewis, WA
Built 1955 Load: 30.8 t ADT: 2,814
STEARNS HILL ROAD
FairOver: BUNKER CREEK
6.0 NW ADNA, Lewis, WA
Built 1984 Load: 30.8 t ADT: 9
NORTH FORK RD
FairOver: N. FK NEWAUKUM RIVER
6.5 NE FOREST, Lewis, WA
Built 1963 Load: 30.8 t ADT: 212
BIG HANAFORD RD.
FairOver: HANAFORD CK.
3.0 E CENTRALIA, Lewis, WA
Built 1974 Load: 30.8 t ADT: 798
BEAVER CREEK RD
FairOver: SOUTH FORK CHEHALIS RIVE
1.2 SW CURTIS, Lewis, WA
Built 1982 Load: 30.8 t ADT: 109
NO DATA ENTERED
FairOver: NORTH FORK TILTON RIVER
2 MILES NW OF JUNCTION WI, Lewis, WA
Built 1973 Load: 30.9 t ADT: 128
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.