Total bridges
1,010
Public highway bridges in Lane County
County profile · official public datasets
Lane County, OR
1,010 public highway bridges tracked in the FHWA National Bridge Inventory: 33% rated Good, 65.5% Fair, 1.5% Poor.
- 1,010
- Public bridges
- 33%
- Good condition
- 1.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Lane County posts a top-quartile lowest Poor-condition share among rated counties in the state across large county bridge inventory.
- Top 17%
- lowest Poor share in state
- 1.5%
- Poor-condition share
- 1,010
- public highway bridges
- 1975
- 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.
Lane County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Lane County ranks #6 of 36 Oregon counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.5%). Lane County, Oregon contains 1,010 public highway bridges. Roughly 33% are rated “Good,” 65.5% “Fair,” and 1.5% “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
33%
333 of 1,010 rated 7-9
Fair condition
65.5%
662 of 1,010 rated 5-6
Poor condition
1.5%
15 of 1,010 rated 4 or below
In-state Poor-share rank
#6 of 36
Among Oregon counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 1,010 NBI-tracked bridges by lowest applicable component rating.
Good 33% (333)
Fair 65.5% (662)
Poor 1.5% (15)
Lane County's Poor-condition bridges carry 47,802 vehicle crossings a day
That is 1% of the county's reported daily bridge traffic on 1.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,187 crossings a day against 2,747 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 1,008 of 1,010 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
48.2% of Lane County's bridges have passed the 50-year mark
487 of the 1,010 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 33% 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 37.4% of the county's Poor-condition bridge traffic
GOODPASTURE IS RD over HWY 132, built 1965, carries 17,868 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 15-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 47,802 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Lane County's bridges were built
1,010 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 13
1920–1929
13 bridges
- 1930s 31
1930–1939
31 bridges
- 1940s 16
1940–1949
16 bridges
- 1950s
1950–1959
133 bridges
- 1960s
1960–1969
223 bridges
- 1970s
1970–1979
212 bridges
- 1980s
1980–1989
170 bridges
- 1990s 86
1990–1999
86 bridges
- 2000s 78
2000–2009
78 bridges
- 2010s 34
2010–2019
34 bridges
- 2020s 13
2020–2029
13 bridges
What this shows Construction peaked in the 1960s, when 223 of the county's bridges still in the inventory were built, which is 22.1% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1975) matches the Oregon average (1975).
How Lane County compares with Oregon's closest counties by inventory size
The 5 Oregon counties nearest Lane County in number of bridges, with their condition splits. Its 1.5% Poor share is the 1st-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1972 is in line with the group.
Showing the 5 closest of 35 Oregon counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Lane County (this page) | 1,010 | 33% | 65.5% | 1.5% | 1975 |
| Douglas County | 699 | 34% | 62.8% | 3.1% | 1973 |
| Linn County | 566 | 20.8% | 61.5% | 17.7% | 1971 |
| Multnomah County | 473 | 11.8% | 85.2% | 3% | 1967 |
| Jackson County | 401 | 34.2% | 64.3% | 1.5% | 1976 |
| Marion County | 373 | 21.2% | 74.5% | 4.3% | 1971 |
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 Lane 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 Lane County, both outside Oregon so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OR (1,010 bridges here).
- Worcester County, MA · 1,014 bridges
- Wayne County, MI · 1,026 bridges
- Denton County, TX · 991 bridges
- Santa Clara County, CA · 964 bridges
Similar average build year
Nearest mean year-built outside OR (1975 here).
- San Bernardino County, CA · avg 1975 · 1,422 bridges
- Fulton County, GA · avg 1975 · 775 bridges
- Westmoreland County, PA · avg 1975 · 620 bridges
- Monroe County, NY · avg 1975 · 615 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (662)
OR 58 (HWY 018)
FairOver: WILLAMETTE R RELIEF OPNG
02.7 MI E HWY 1 JCT, Lane, OR
Built 2008 Load: 67.7 t ADT: 14,986
19 S 07 W 21.00:
FairOver: SIUSLAW RIVER
19 miles SE of Hwy 126 (M, Lane, OR
Built 2004 Load: 69.0 t ADT: 20
OR 36 (HWY 229)
FairOver: LONG TOM RIVER 1ST XING
12.4 W CHESHIRE PO, Lane, OR
Built 1987 Load: 69.0 t ADT: 916
OR 36 (HWY 229)
FairOver: CREEK
010 MI W OF HWY 99W, Lane, OR
Built 1985 Load: 69.0 t ADT: 3,549
OR 126 (Hwy 62)
FairOver: Patterson Creek
027 MI E FLORENCE, Lane, OR
Built 1966 Load: 69.0 t ADT: 5,522
I-105 (HWY 227) EB
FairOver: WASHINGTON STREET
AT JCT HWY 227 (I-105), Lane, OR
Built 1973 Load: 69.0 t ADT: 8,100
I-105 (HWY 227)CON
FairOver: JEFFERSON STREET
S99W JCT HWY 1W, Lane, OR
Built 1973 Load: 69.0 t ADT: 16,800
OR 126 (HWY 015)
FairOver: MILL CREEK
053 MI E BLUE RIVER, Lane, OR
Built 1966 Load: 69.0 t ADT: 2,481
Little Lake Road
FairOver: Thalweg Creek
006 MI SO TRIANGLE LAKE, Lane, OR
Built 2012 Load: 69.0 t ADT: 60
ROAD
FairOver: QUARTZ CR
3.2 SE JCT HY 126-FS 2618, Lane, OR
Built 1978 Load: 70.8 t ADT: 75
ROAD
FairOver: WALL CR
1 1/2 N JCT HWY 58-FS 24, Lane, OR
Built 1961 Load: 75.4 t ADT: 25
ROAD
FairOver: MID FK WILLAMETTE R
.5 SE JCT 58-FS 23-S #21, Lane, OR
Built 1958 Load: 90.8 t ADT: 50
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.