County profile · official public datasets

Nodaway County, MO

396 public highway bridges tracked in the FHWA National Bridge Inventory: 48% rated Good, 37.6% Fair, 14.4% Poor.

396
Public bridges: 48%
Good condition: 14.4%
Poor condition

The verdict

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

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

90th
of 115 on Poor share: 14.4%
Poor-condition share: 396
public highway bridges: 1992
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.

Nodaway County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Nodaway County ranks #90 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 14.4%). Nodaway County, Missouri contains 396 public highway bridges. Roughly 48% are rated “Good,” 37.6% “Fair,” and 14.4% “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

396

Public highway bridges in Nodaway County

Good condition

48%

190 of 396 rated 7-9

Fair condition

37.6%

149 of 396 rated 5-6

Poor condition

14.4%

57 of 396 rated 4 or below

In-state Poor-share rank

#90 of 115

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

Condition distribution

Share of 396 NBI-tracked bridges by lowest applicable component rating.

Good

48% (190)

Fair

37.6% (149)

Poor

14.4% (57)

Nodaway County's Poor-condition bridges carry 2,743 vehicle crossings a day

That is 2.6% of the county's reported daily bridge traffic on 14.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 48 crossings a day against 148 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 396 of 396 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

19.2% of Nodaway County's bridges have passed the 50-year mark

76 of the 396 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 48% 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 14.7% of the county's Poor-condition bridge traffic

RT C E over MOSS BR, built 1932, carries 402 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 57-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,743 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

4
1930s

9
1940s

8
1950s

30
1960s

18
1970s

12
1980s

49
1990s

87
2000s

80
2010s

69
2020s

30

What this shows Construction peaked in the 1990s, when 87 of the county's bridges still in the inventory were built, which is 22% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1992, 13 years newer than the Missouri average of 1979.

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

The 5 Missouri counties nearest Nodaway County in number of bridges, with their condition splits. Its 14.4% Poor share is the 6th-lowest of these 6. Its average build year of 1992 against a peer-group mean of 1985 is 7 years newer.

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

Bridge inventory size and condition shares for Nodaway County and the 5 Missouri counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
St. Charles County	417	32.4%	64.3%	3.4%	1994
Jefferson County	411	33.6%	63%	3.4%	1981
Vernon County	401	35.4%	60.3%	4.2%	1988
Nodaway County (this page)	396	48%	37.6%	14.4%	1992
Cass County	377	36.3%	54.9%	8.8%	1983
Cape Girardeau County	374	35.8%	59.1%	5.1%	1978

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

Similar inventory size

Nearest county inventories outside MO (396 bridges here).

Humboldt County, CA · 396 bridges
Somerset County, NJ · 397 bridges
Essex County, MA · 395 bridges
Creek County, OK · 395 bridges

Similar average build year

Nearest mean year-built outside MO (1992 here).

Johnson County, KS · avg 1992 · 781 bridges
Wake County, NC · avg 1992 · 760 bridges
Benton County, AR · avg 1992 · 410 bridges
Cameron County, TX · avg 1992 · 355 bridges

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

All 396 Good 190 Fair 149 Poor 57

All bridges (396)

Sort:

Nodaway County Bridge Snapshot

Condition distribution

Nodaway County's Poor-condition bridges carry 2,743 vehicle crossings a day

19.2% of Nodaway County's bridges have passed the 50-year mark

One structure carries 14.7% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (396)

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