County profile · official public datasets

Randolph County, MO

163 public highway bridges tracked in the FHWA National Bridge Inventory: 60.1% rated Good, 36.8% Fair, 3.1% Poor.

163
Public bridges: 60.1%
Good condition: 3.1%
Poor condition

The verdict

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

Randolph County pairs a top-5% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 3%
lowest Poor share in state: 3.1%
Poor-condition share: 163
public highway bridges: 1984
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.

Randolph County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Randolph County ranks #4 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.1%). Randolph County, Missouri contains 163 public highway bridges. Roughly 60.1% are rated “Good,” 36.8% “Fair,” and 3.1% “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

163

Public highway bridges in Randolph County

Good condition

60.1%

98 of 163 rated 7-9

Fair condition

36.8%

60 of 163 rated 5-6

Poor condition

3.1%

5 of 163 rated 4 or below

In-state Poor-share rank

#4 of 115

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

Condition distribution

Share of 163 NBI-tracked bridges by lowest applicable component rating.

Good

60.1% (98)

Fair

36.8% (60)

Poor

3.1% (5)

Randolph County's Poor-condition bridges carry 6,009 vehicle crossings a day

That is 4% of the county's reported daily bridge traffic on 3.1% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 1,202 crossings a day against 700 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 163 of 163 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

22.1% of Randolph County's bridges have passed the 50-year mark

36 of the 163 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 60.1% 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 51.5% of the county's Poor-condition bridge traffic

US 24 E over E FK SALT RVR, built 1947, carries 3,092 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 5-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 6,009 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

1
1920s

2
1930s

5
1940s

7
1950s

10
1960s

7
1970s

9
1980s

34
1990s

54
2000s

29
2010s

5

What this shows Construction peaked in the 1990s, when 54 of the county's bridges still in the inventory were built, which is 33.1% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1984, 5 years newer than the Missouri average of 1979.

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

The 5 Missouri counties nearest Randolph County in number of bridges, with their condition splits. Its 3.1% Poor share is the 1st-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1973 is 11 years newer.

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

Bridge inventory size and condition shares for Randolph County and the 5 Missouri counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
St. Francois County	165	38.2%	51.5%	10.3%	1968
Montgomery County	163	28.8%	65%	6.1%	1979
Randolph County (this page)	163	60.1%	36.8%	3.1%	1984
Andrew County	162	38.9%	46.3%	14.8%	1984
Texas County	162	26.5%	66%	7.4%	1963
Dade County	161	36.6%	58.4%	5%	1972

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

Similar inventory size

Nearest county inventories outside MO (163 bridges here).

Mercer County, IL · 163 bridges
Jennings County, IN · 163 bridges
Wayne County, IA · 163 bridges
Jackson County, LA · 163 bridges

Similar average build year

Nearest mean year-built outside MO (1984 here).

Hennepin County, MN · avg 1984 · 936 bridges
Duval County, FL · avg 1984 · 831 bridges
El Paso County, CO · avg 1984 · 686 bridges
Bell County, TX · avg 1984 · 660 bridges

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

All 163 Good 98 Fair 60 Poor 5

All bridges (163)

Sort:

Randolph County Bridge Snapshot

Condition distribution

Randolph County's Poor-condition bridges carry 6,009 vehicle crossings a day

22.1% of Randolph County's bridges have passed the 50-year mark

One structure carries 51.5% of the county's Poor-condition bridge traffic

How Randolph 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 (163)

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