County profile · official public datasets

Osage County, MO

100 public highway bridges tracked in the FHWA National Bridge Inventory: 37% rated Good, 45% Fair, 18% Poor.

100
Public bridges
37%
Good condition
18%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Osage County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

105th
of 115 on Poor share
18%
Poor-condition share
100
public highway bridges
1970
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.

Osage County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Osage County ranks #105 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 18%). Osage County, Missouri contains 100 public highway bridges. Roughly 37% are rated “Good,” 45% “Fair,” and 18% “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.

Total bridges

100

Public highway bridges in Osage County

Good condition

37%

37 of 100 rated 7-9

Fair condition

45%

45 of 100 rated 5-6

Poor condition

18%

18 of 100 rated 4 or below

In-state Poor-share rank

#105 of 115

Among Missouri counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 100 NBI-tracked bridges by lowest applicable component rating.

Good
37% (37)
Fair
45% (45)
Poor
18% (18)

Osage County's Poor-condition bridges carry 2,952 vehicle crossings a day

That is 2.4% of the county's reported daily bridge traffic on 18% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 164 crossings a day against 1,088 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 100 of 100 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

59% of Osage County's bridges have passed the 50-year mark

59 of the 100 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 37% 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

RT T S over LOOSE CR, built 1966, carries 1,204 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 18-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,952 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Osage County's bridges were built

100 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 17 of the county's bridges still in the inventory were built, which is 17% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1970, 9 years older than the Missouri average of 1979.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Osage County compares with Missouri's closest counties by inventory size

The 5 Missouri counties nearest Osage County in number of bridges, with their condition splits. Its 18% Poor share is the 6th-lowest of these 6. Its average build year of 1970 against a peer-group mean of 1969 is in line with the group.

Showing the 5 closest of 114 Missouri counties eligible for comparison.

Bridge inventory size and condition shares for Osage County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
Morgan County 105 10.5%
Pulaski County 104 10.6%
Ste. Genevieve County 104 10.6%
Osage County (this page) 100 18%
Mississippi County 99 11.1%
Moniteau County 93 12.9%

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 Osage 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 Osage County, both outside Missouri so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MO (100 bridges here).

Similar average build year

Nearest mean year-built outside MO (1970 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 100 Good 37 Fair 45 Poor 18

Good-condition bridges (37)

COUNTY RD 613

Good

Over: BEAR CR

S 31 T 43 N R 9 W, Osage, MO

Built 2010 Load: 13.5 t ADT: 5

RT T S

Good

Over: MARIES RVR

S 11 T 42 N R 10 W, Osage, MO

Built 1966 Load: 18.0 t ADT: 1,087

COUNTY RD 512

Good

Over: MARIES CR

S 34 T 43 N R 10 W, Osage, MO

Built 1910 Load: 22.5 t ADT: 60

RT D S

Good

Over: MISTAKEN CREEK

S 2 T 42 N R 7 W, Osage, MO

Built 2020 Load: 25.2 t ADT: 240

US 50 E

Good

Over: MARIES RVR

S 2 T 43 N R 10 W, Osage, MO

Built 2012 Load: 30.6 t ADT: 3,449

COUNTY RD 304

Good

Over: BR OF CARTER CR

S 11 T 43 N R 8 W, Osage, MO

Built 2001 Load: 31.5 t ADT: 100

COUNTY RD 275

Good

Over: BAILEYS CR

S 23 T 45 N R 7 W, Osage, MO

Built 2000 Load: 32.4 t ADT: 50

COUNTY RD 303

Good

Over: CEDAR CR

S 33 T 44 N R 8 W, Osage, MO

Built 2003 Load: 32.4 t ADT: 50

COUNTY RD 317

Good

Over: TRIB OF DEER CR

S 4 T 44 N R 8 W, Osage, MO

Built 2014 Load: 32.4 t ADT: 100

COUNTY RD 610

Good

Over: INDIAN CR

S 19 T 43 N R 9 W, Osage, MO

Built 2015 Load: 32.4 t ADT: 10

RT N S

Good

Over: CLARK CR

S 3 T 43 N R 7 W, Osage, MO

Built 1958 Load: 33.3 t ADT: 118

RT N S

Good

Over: CONTRARY CR

S 15 T 43 N R 7 W, Osage, MO

Built 2020 Load: 34.2 t ADT: 118

COUNTY RD 412

Good

Over: LUZON BR

S 13 T 44 N R 10 W, Osage, MO

Built 2014 Load: 36.0 t ADT: 50

MO 100 E

Good

Over: CEDAR CR

S 20 T 44 N R 8 W, Osage, MO

Built 2022 Load: 36.0 t ADT: 1,885

US 50 W

Good

Over: MARIES RVR

S 2 T 43 N R 10 W, Osage, MO

Built 1984 Load: 36.9 t ADT: 3,627

COUNTY RD 610

Good

Over: BEAR CR

S 25 T 43 N R 10 W, Osage, MO

Built 1995 Load: 37.8 t ADT: 30

US 63 S

Good

Over: MARIES RVR

S 35 T 43 N R 10 W, Osage, MO

Built 1985 Load: 37.8 t ADT: 7,726

COUNTY RD 521

Good

Over: DEER CR

S 13 T 42 N R 10 W, Osage, MO

Built 2005 Load: 38.7 t ADT: 10

COUNTY RD 232

Good

Over: BR OF BAILEYS CR

S 29 T 44 N R 7 W, Osage, MO

Built 2016 Load: 38.7 t ADT: 10

RT U S

Good

Over: LINN CR

S 18 T 43 N R 8 W, Osage, MO

Built 1961 Load: 38.7 t ADT: 1,479

COUNTY RD 551

Good

Over: SUGAR CR

S 7 T 41 N R 11 W, Osage, MO

Built 2007 Load: 39.6 t ADT: 50

RT K S

Good

Over: DOOLINGS CR

S 11 T 45 N R 8 W, Osage, MO

Built 2012 Load: 39.6 t ADT: 278

MO 100 E

Good

Over: SHAWNEE CR

S 1 T 45 N R 7 W, Osage, MO

Built 2020 Load: 39.6 t ADT: 399

COUNTY RD 711

Good

Over: BUCK ELK CR

S 10 T 41 N R 8 W, Osage, MO

Built 2004 Load: 40.5 t ADT: 45

RT HH E

Good

Over: FK OF BAILEYS CR

S 17 T 44 N R 7 W, Osage, MO

Built 2012 Load: 40.5 t ADT: 98

MO 100 E

Good

Over: DOOLING CR

S 11 T 45 N R 8 W, Osage, MO

Built 2001 Load: 42.3 t ADT: 434

OLIVE ST

Good

Over: TRIB. TO SUGAR CRE

S 8 T 41 N R 11 W, Osage, MO

Built 1993 Load: 43.2 t ADT: 30

COUNTY RD 621

Good

Over: LINN CR

S 18 T 43 N R 8 W, Osage, MO

Built 1997 Load: 44.1 t ADT: 100

COUNTY RD 531

Good

Over: SCHOOL HOLLOW BR

S 7 T 41 N R 9 W, Osage, MO

Built 2018 Load: 44.1 t ADT: 30

COUNTY RD 521

Good

Over: MARIES RIVER

S 24 T 42 N R 10 W, Osage, MO

Built 2011 Load: 45.9 t ADT: 15

COUNTY RD 274A

Good

Over: SHAWNEE CR

S 16 T 45 N R 7 W, Osage, MO

Built 2020 Load: 47.7 t ADT: 25

RT A S

Good

Over: US 50

S 12 T 43 N R 10 W, Osage, MO

Built 2012 Load: 49.5 t ADT: 2,131

COUNTY RD 303

Good

Over: LINN CRK

S 17 T 43 N R 8 W, Osage, MO

Built 2024 Load: 57.6 t ADT: 100

US 50 E

Good

Over: UNNAMED TRIB OF MA

S 2 T 43 N R 10 W, Osage, MO

Built 2012 Load: 64.8 t ADT: 7,076

US 50 E

Good

Over: LOOSE CREEK

S 5 T 43 N R 9 W, Osage, MO

Built 2012 Load: 64.8 t ADT: 7,076

COUNTY RD 624

Good

Over: SWAN CR

S 5 T 42 N R 8 W, Osage, MO

Built 2007 Load: 66.6 t ADT: 25

RT A S

Good

Over: UNNAMED TRIB OF MA

S 2 T 43 N R 10 W, Osage, MO

Built 2012 Load: 99.9 t ADT: 2,131

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.