County profile · official public datasets

Callaway County, MO

303 public highway bridges tracked in the FHWA National Bridge Inventory: 39.3% rated Good, 54.5% Fair, 6.3% Poor.

303
Public bridges
39.3%
Good condition
6.3%
Poor condition

The verdict

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

Callaway County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 30%
lowest Poor share in state
6.3%
Poor-condition share
303
public highway bridges
1978
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.

Callaway County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Callaway County ranks #34 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.3%). Callaway County, Missouri contains 303 public highway bridges. Roughly 39.3% are rated “Good,” 54.5% “Fair,” and 6.3% “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.

Total bridges

303

Public highway bridges in Callaway County

Good condition

39.3%

119 of 303 rated 7-9

Fair condition

54.5%

165 of 303 rated 5-6

Poor condition

6.3%

19 of 303 rated 4 or below

In-state Poor-share rank

#34 of 115

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

Condition distribution

Share of 303 NBI-tracked bridges by lowest applicable component rating.

Good
39.3% (119)
Fair
54.5% (165)
Poor
6.3% (19)

Callaway County's Poor-condition bridges carry 18,389 vehicle crossings a day

That is 2.2% of the county's reported daily bridge traffic on 6.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 968 crossings a day against 1,712 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 303 of 303 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

36.3% of Callaway County's bridges have passed the 50-year mark

110 of the 303 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 39.3% 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 68.4% of the county's Poor-condition bridge traffic

US 63 S over KATY TRAIL, built 1924, carries 12,571 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 19-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 18,389 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Callaway County's bridges were built

303 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 65 of the county's bridges still in the inventory were built, which is 21.5% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1978) matches the Missouri average (1979).

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

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

The 5 Missouri counties nearest Callaway County in number of bridges, with their condition splits. Its 6.3% Poor share is the 2nd-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1985 is 7 years older.

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

Bridge inventory size and condition shares for Callaway County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
Audrain County 314 4.8%
Linn County 313 17.6%
Callaway County (this page) 303 6.3%
Adair County 301 6.6%
Newton County 300 6.7%
Macon County 291 7.6%

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

Similar inventory size

Nearest county inventories outside MO (303 bridges here).

Similar average build year

Nearest mean year-built outside MO (1978 here).

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

All 303 Good 119 Fair 165 Poor 19

Good-condition bridges (119)

COUNTY RD 170

Good

Over: PRAIRIE FORK BR

S 11 T 47 N R 7 W, Callaway, MO

Built 1966 Load: 9.9 t ADT: 30

COUNTY RD 166

Good

Over: HUNT BR

S 28 T 49 N R 8 W, Callaway, MO

Built 1912 Load: 11.7 t ADT: 100

WESTMINSTER EXTEN

Good

Over: SMITH BR

S 5 T 47 N R 9 W, Callaway, MO

Built 1980 Load: 16.2 t ADT: 120

COUNTY RD 440

Good

Over: GALLONS CR

S 7 T 45 N R 9 W, Callaway, MO

Built 1984 Load: 16.2 t ADT: 15

RT A S

Good

Over: IS 70

S 15 T 48 N R 8 W, Callaway, MO

Built 1963 Load: 17.1 t ADT: 307

RT D S

Good

Over: IS 70

S 21 T 48 N R 7 W, Callaway, MO

Built 1963 Load: 18.9 t ADT: 1,291

RT O E

Good

Over: CROWS FK CR

S 1 T 46 N R 9 W, Callaway, MO

Built 1967 Load: 20.7 t ADT: 931

US 54 W

Good

Over: RICHLAND CR

S 29 T 48 N R 9 W, Callaway, MO

Built 1968 Load: 22.5 t ADT: 8,860

COUNTY RD 183

Good

Over: CLARK BR

S 1 T 48 N R 7 W, Callaway, MO

Built 1986 Load: 22.5 t ADT: 45

COUNTY RD 132

Good

Over: AUXVASSEE CR

S 15 T 47 N R 8 W, Callaway, MO

Built 1986 Load: 22.5 t ADT: 100

US 54 W

Good

Over: MIDDLE RVR

S 2 T 46 N R 10 W, Callaway, MO

Built 1975 Load: 23.4 t ADT: 7,544

RT Z E

Good

Over: AUXVASSE CR

S 20 T 48 N R 8 W, Callaway, MO

Built 1985 Load: 23.4 t ADT: 1,067

RT H E

Good

Over: DAVIS CR

S 34 T 47 N R 10 W, Callaway, MO

Built 2017 Load: 24.3 t ADT: 1,323

COUNTY RD 1053

Good

Over: MORRIS BR

S 13 T 49 N R 7 W, Callaway, MO

Built 2001 Load: 25.2 t ADT: 20

COUNTY RD 122

Good

Over: DYERS BR

S 30 T 48 N R 8 W, Callaway, MO

Built 2004 Load: 25.2 t ADT: 20

COUNTY RD 4000

Good

Over: LIT AUXVASSE CR

S 34 T 45 N R 9 W, Callaway, MO

Built 1990 Load: 26.1 t ADT: 10

COUNTY RD 1054

Good

Over: MORRIS BR

S 1 T 49 N R 7 W, Callaway, MO

Built 2001 Load: 26.1 t ADT: 20

RT F E

Good

Over: STINSON CR

S 17 T 47 N R 9 W, Callaway, MO

Built 1968 Load: 28.8 t ADT: 6,900

RT Z E

Good

Over: CROWS FK CR

S 2 T 47 N R 9 W, Callaway, MO

Built 1988 Load: 28.8 t ADT: 1,673

COUNTY RD 395

Good

Over: BR OF CEDAR CR

S 29 T 45 N R 11 W, Callaway, MO

Built 1990 Load: 30.6 t ADT: 50

RT D S

Good

Over: IS 70

S 19 T 48 N R 7 W, Callaway, MO

Built 2019 Load: 31.5 t ADT: 924

CR 252

Good

Over: SALLY BR

S 15 T 48 N R 11 W, Callaway, MO

Built 2019 Load: 31.5 t ADT: 50

COUNTY RD 246

Good

Over: MILLERS CR

S 19 T 48 N R 10 W, Callaway, MO

Built 1905 Load: 32.4 t ADT: 50

BLUFF ST

Good

Over: STINSON CR

S 16 T 47 N R 9 W, Callaway, MO

Built 1981 Load: 32.4 t ADT: 6,712

COUNTY RD 484

Good

Over: BR LIT AUXVASSE CR

S 26 T 45 N R 10 W, Callaway, MO

Built 1983 Load: 32.4 t ADT: 25

COUNTY RD 485

Good

Over: LIT AUXVASSE CR

S 32 T 45 N R 9 W, Callaway, MO

Built 1990 Load: 32.4 t ADT: 30

COUNTY RD 133

Good

Over: AUXVASSE CR

S 27 T 47 N R 8 W, Callaway, MO

Built 1993 Load: 32.4 t ADT: 80

COUNTY RD 1027

Good

Over: BACHELOR CR

S 19 T 49 N R 7 W, Callaway, MO

Built 1988 Load: 32.4 t ADT: 40

COUNTY RD 184

Good

Over: WHETSTONE CR

S 11 T 48 N R 8 W, Callaway, MO

Built 1983 Load: 32.4 t ADT: 30

COUNTY RD 108

Good

Over: CROWS FORK CR

S 1 T 47 N R 9 W, Callaway, MO

Built 1994 Load: 32.4 t ADT: 75

COUNTY RD 134

Good

Over: AUXVASSE CR

S 10 T 47 N R 8 W, Callaway, MO

Built 1991 Load: 32.4 t ADT: 50

WOOD ST

Good

Over: STINSON CR

S 16 T 47 N R 9 W, Callaway, MO

Built 1998 Load: 32.4 t ADT: 500

MO 94 E

Good

Over: MIDDLE RVR

S 27 T 45 N R 9 W, Callaway, MO

Built 2001 Load: 32.4 t ADT: 1,585

COUNTY RD 269

Good

Over: MANACLE CR

S 2 T 48 N R 11 W, Callaway, MO

Built 2003 Load: 32.4 t ADT: 150

COUNTY RD 240

Good

Over: AUXVASSE CREEK

S 4 T 48 N R 10 W, Callaway, MO

Built 1997 Load: 33.3 t ADT: 100

COUNTY RD 1011

Good

Over: BACHELOR CR

S 23 T 49 N R 8 W, Callaway, MO

Built 2011 Load: 33.3 t ADT: 40

COUNTY RD 445

Good

Over: CLABBER CRK

S 11 T 45 N R 9 W, Callaway, MO

Built 2024 Load: 33.3 t ADT: 50

COUNTY RD 2002

Good

Over: BYNUM CR

S 5 T 49 N R 9 W, Callaway, MO

Built 1996 Load: 34.2 t ADT: 40

RT EE S

Good

Over: BACHELOR CR

S 28 T 49 N R 7 W, Callaway, MO

Built 1971 Load: 34.2 t ADT: 137

OLD HWY 54

Good

Over: MIDDLE RIVER

S 2 T 46 N R 10 W, Callaway, MO

Built 2001 Load: 34.2 t ADT: 430

US 54 E

Good

Over: KATY TRAIL

S 10 T 44 N R 11 W, Callaway, MO

Built 1977 Load: 34.2 t ADT: 19,404

COUNTY RD 363

Good

Over: DRY FORK CR

S 11 T 46 N R 11 W, Callaway, MO

Built 1993 Load: 35.1 t ADT: 20

COUNTY RD 485

Good

Over: GALLONS CR

S 20 T 45 N R 9 W, Callaway, MO

Built 2000 Load: 35.1 t ADT: 25

COUNTY RD 455

Good

Over: COLLIER CR

S 7 T 45 N R 8 W, Callaway, MO

Built 2002 Load: 35.1 t ADT: 50

COUNTY RD 135

Good

Over: PINCH CR

S 11 T 47 N R 8 W, Callaway, MO

Built 2019 Load: 35.1 t ADT: 25

RT HH S

Good

Over: US 54

S 6 T 47 N R 9 W, Callaway, MO

Built 2001 Load: 36.0 t ADT: 365

US 54 E

Good

Over: HILLERS CR

S 21 T 46 N R 10 W, Callaway, MO

Built 1992 Load: 36.0 t ADT: 7,406

US 63 N

Good

Over: CST OILWELL RD KATY T

S 9 T 44 N R 11 W, Callaway, MO

Built 1975 Load: 36.0 t ADT: 12,608

COUNTY RD 482

Good

Over: DYERS BR

S 6 T 47 N R 8 W, Callaway, MO

Built 2003 Load: 36.0 t ADT: 50

COUNTY RD 334

Good

Over: BR OF MILLERS CR

S 13 T 47 N R 11 W, Callaway, MO

Built 2003 Load: 36.0 t ADT: 40

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

Related

Browse all → | Rankings →
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.