Total bridges
84
Public highway bridges in Oregon County
County profile · official public datasets
Oregon County, MO
84 public highway bridges tracked in the FHWA National Bridge Inventory: 22.6% rated Good, 69% Fair, 8.3% Poor.
- 84
- Public bridges
- 22.6%
- Good condition
- 8.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Oregon 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 46%
- lowest Poor share in state
- 8.3%
- Poor-condition share
- 84
- public highway bridges
- 1957
- 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.
Oregon County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Oregon County ranks #53 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.3%). Oregon County, Missouri contains 84 public highway bridges. Roughly 22.6% are rated “Good,” 69% “Fair,” and 8.3% “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
22.6%
19 of 84 rated 7-9
Fair condition
69%
58 of 84 rated 5-6
Poor condition
8.3%
7 of 84 rated 4 or below
In-state Poor-share rank
#53 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 84 NBI-tracked bridges by lowest applicable component rating.
Good 22.6% (19)
Fair 69% (58)
Poor 8.3% (7)
Oregon County's Poor-condition bridges carry 5,233 vehicle crossings a day
That is 7.3% of the county's reported daily bridge traffic on 8.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 748 crossings a day against 469 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 84 of 84 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
79.8% of Oregon County's bridges have passed the 50-year mark
67 of the 84 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 22.6% 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 27.3% of the county's Poor-condition bridge traffic
MO 19 S over ELEVEN POINT RVR, built 1934, carries 1,426 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 7-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 5,233 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Oregon County's bridges were built
84 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s
1920–1929
11 bridges
- 1930s
1930–1939
17 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s
1950–1959
12 bridges
- 1960s
1960–1969
18 bridges
- 1970s 4
1970–1979
4 bridges
- 1980s 6
1980–1989
6 bridges
- 1990s 1
1990–1999
1 bridges
- 2000s 4
2000–2009
4 bridges
- 2010s 4
2010–2019
4 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1960s, when 18 of the county's bridges still in the inventory were built, which is 21.4% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1957, 22 years older than the Missouri average of 1979.
How Oregon County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Oregon County in number of bridges, with their condition splits. Its 8.3% Poor share is the 2nd-lowest of these 6. Its average build year of 1957 against a peer-group mean of 1974 is 17 years older.
Showing the 5 closest of 114 Missouri counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Moniteau County | 93 | 28% | 59.1% | 12.9% | 1964 |
| Camden County | 92 | 47.8% | 43.5% | 8.7% | 1987 |
| Reynolds County | 91 | 22% | 68.1% | 9.9% | 1966 |
| Oregon County (this page) | 84 | 22.6% | 69% | 8.3% | 1957 |
| Ozark County | 82 | 20.7% | 75.6% | 3.7% | 1968 |
| Worth County | 81 | 46.9% | 33.3% | 19.8% | 1983 |
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 Oregon 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 Oregon County, both outside Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (84 bridges here).
- Chaffee County, CO · 84 bridges
- Elbert County, GA · 84 bridges
- Glynn County, GA · 84 bridges
- Paulding County, GA · 84 bridges
Similar average build year
Nearest mean year-built outside MO (1957 here).
- Essex County, MA · avg 1957 · 395 bridges
- Labette County, KS · avg 1957 · 349 bridges
- Greenwood County, KS · avg 1957 · 235 bridges
- Greer County, OK · avg 1957 · 230 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (19)
COUNTY RD 268
GoodOver: WARM FK OF SPRING
S 4 T 21 N R 5 W, Oregon, MO
Built 1921 Load: 9.9 t ADT: 50
COUNTY RD 102
GoodOver: TRIB OF LIT HURRIC
S 13 T 24 N R 4 W, Oregon, MO
Built 1973 Load: 16.2 t ADT: 50
COUNTY RD 236
GoodOver: DRY CR
S 36 T 23 N R 3 W, Oregon, MO
Built 1985 Load: 16.2 t ADT: 20
COUNTY RD 306
GoodOver: FREDRICK CR
S 7 T 23 N R 4 W, Oregon, MO
Built 1989 Load: 16.2 t ADT: 30
CITY ST
GoodOver: PINEY CR
S 34 T 24 N R 4 W, Oregon, MO
Built 1949 Load: 20.7 t ADT: 300
RT U S
GoodOver: PINE CR
S 23 T 23 N R 2 W, Oregon, MO
Built 1955 Load: 21.6 t ADT: 22
CITY ST
GoodOver: CREEK
S 31 T 22 N R 5 W, Oregon, MO
Built 1938 Load: 22.5 t ADT: 400
RT P E
GoodOver: CULP HOLLOW
S 35 T 24 N R 6 W, Oregon, MO
Built 1954 Load: 25.2 t ADT: 1,463
COUNTY RD 385
GoodOver: GRAND GULF CR
S 17 T 22 N R 6 W, Oregon, MO
Built 1962 Load: 32.4 t ADT: 25
CITY ST
GoodOver: TRIB OF WARM FK
S 31 T 22 N R 5 W, Oregon, MO
Built 2010 Load: 32.4 t ADT: 100
RT V E
GoodOver: DAVIS CR
S 32 T 22 N R 3 W, Oregon, MO
Built 1963 Load: 33.3 t ADT: 545
RT E S
GoodOver: SANDERS BR
S 2 T 23 N R 4 W, Oregon, MO
Built 1963 Load: 34.2 t ADT: 1,206
RT Y S
GoodOver: FREDERICK CR
S 12 T 22 N R 3 W, Oregon, MO
Built 2011 Load: 41.4 t ADT: 49
CR 225
GoodOver: FREDERICK CR
S 1 T 22 N R 3 W, Oregon, MO
Built 2016 Load: 44.1 t ADT: 30
RT V E
GoodOver: MILL CR
S 35 T 22 N R 3 W, Oregon, MO
Built 1963 Load: 44.1 t ADT: 1,025
MO 99 S
GoodOver: ELEVEN POINT RVR
S 32 T 25 N R 5 W, Oregon, MO
Built 2001 Load: 45.0 t ADT: 715
RT BB E
GoodOver: BEE FK CR
S 1 T 21 N R 3 W, Oregon, MO
Built 1966 Load: 45.9 t ADT: 380
BU 63 S
GoodOver: TWO MILE CR BNSF RR
S 30 T 22 N R 5 W, Oregon, MO
Built 2020 Load: 47.7 t ADT: 2,490
COUNTY RD 154
GoodOver: HURRICANE CR
S 34 T 25 N R 3 W, Oregon, MO
Built 2013 Load: 50.4 t ADT: 15
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.