County profile · official public datasets

Holt County, MO

167 public highway bridges tracked in the FHWA National Bridge Inventory: 38.3% rated Good, 46.7% Fair, 15% Poor.

167
Public bridges: 38.3%
Good condition: 15%
Poor condition

The verdict

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

Holt 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.

96th
of 115 on Poor share: 15%
Poor-condition share: 167
public highway bridges: 1974
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.

Holt County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Holt County ranks #96 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 15%). Holt County, Missouri contains 167 public highway bridges. Roughly 38.3% are rated “Good,” 46.7% “Fair,” and 15% “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

167

Public highway bridges in Holt County

Good condition

38.3%

64 of 167 rated 7-9

Fair condition

46.7%

78 of 167 rated 5-6

Poor condition

15%

25 of 167 rated 4 or below

In-state Poor-share rank

#96 of 115

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

Condition distribution

Share of 167 NBI-tracked bridges by lowest applicable component rating.

Good

38.3% (64)

Fair

46.7% (78)

Poor

15% (25)

Holt County's Poor-condition bridges carry 15,454 vehicle crossings a day

That is 6.3% of the county's reported daily bridge traffic on 15% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 618 crossings a day against 1,009 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 167 of 167 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

55.1% of Holt County's bridges have passed the 50-year mark

92 of the 167 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 38.3% 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 54.2% of the county's Poor-condition bridge traffic

IS 29 N over LIT TARKIO CR, built 1972, carries 8,371 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 25-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 15,454 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

5
1910s

1
1920s

10
1930s

15
1940s

6
1950s

4
1960s

20
1970s

33
1980s

4
1990s

21
2000s

24
2010s

22
2020s

2

What this shows Construction peaked in the 1970s, when 33 of the county's bridges still in the inventory were built, which is 19.8% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1974, 5 years older than the Missouri average of 1979.

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

The 5 Missouri counties nearest Holt County in number of bridges, with their condition splits. Its 15% Poor share is the 5th-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1979 is 5 years older.

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

Bridge inventory size and condition shares for Holt County and the 5 Missouri counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Lewis County	171	28.7%	66.1%	5.3%	1990
Knox County	167	34.7%	61.1%	4.2%	1987
Holt County (this page)	167	38.3%	46.7%	15%	1974
Barry County	166	23.5%	61.4%	15.1%	1973
St. Francois County	165	38.2%	51.5%	10.3%	1968
Montgomery County	163	28.8%	65%	6.1%	1979

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

Similar inventory size

Nearest county inventories outside MO (167 bridges here).

Cherokee County, AL · 167 bridges
Garfield County, CO · 167 bridges
Mitchell County, IA · 167 bridges
Ness County, KS · 167 bridges

Similar average build year

Nearest mean year-built outside MO (1974 here).

Knox County, TN · avg 1974 · 588 bridges
Summit County, OH · avg 1974 · 563 bridges
Onondaga County, NY · avg 1974 · 472 bridges
Orange County, NY · avg 1974 · 472 bridges

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

All 167 Good 64 Fair 78 Poor 25

Fair-condition bridges (78)

Sort:

Holt County Bridge Snapshot

Condition distribution

Holt County's Poor-condition bridges carry 15,454 vehicle crossings a day

55.1% of Holt County's bridges have passed the 50-year mark

One structure carries 54.2% of the county's Poor-condition bridge traffic

How Holt 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

Fair-condition bridges (78)

LINCOLN RD

COUNTY RD 310

COUNTY RD 150

FARMERS DR

COUNTY RD 140

PRAIRIE RD

COUNTY RD 130

DIAGONAL ST

COUNTY RD 290

QUEBEC RD

OZARK RD

COUNTY RD 130

MO 111 S

UNITY RD

MO 113 S

MO 113 S

MO 113 S

RT Y S

COUNTY RD 190

BEAGLE RD S

COUNTY RD 110

GRAYSTONE RD S

RT E S

RT B S

RT HH E

MO 111 S

MO 113 S

IS 29 S

IS 29 N

IS 29 S

MO 113 S

COUNTY RD 180

IS 29 S

IS 29 S

IS 29 N

MAYWOOD RD

US 159 S

US 159 S

RT C E

MO 118 E

IS 29 S

IS 29 N

IS 29 N

IS 29 S

IS 29 N

RT B S

COUNTY RD 120

COUNTY RD 140

OMAHA RD

COUNTY RD 250

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