County profile · official public datasets

Gentry County, MO

246 public highway bridges tracked in the FHWA National Bridge Inventory: 52% rated Good, 33.3% Fair, 14.6% Poor.

246
Public bridges: 52%
Good condition: 14.6%
Poor condition

The verdict

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

Gentry 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.

93rd
of 115 on Poor share: 14.6%
Poor-condition share: 246
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.

Gentry County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Gentry County ranks #93 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 14.6%). Gentry County, Missouri contains 246 public highway bridges. Roughly 52% are rated “Good,” 33.3% “Fair,” and 14.6% “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

246

Public highway bridges in Gentry County

Good condition

52%

128 of 246 rated 7-9

Fair condition

33.3%

82 of 246 rated 5-6

Poor condition

14.6%

36 of 246 rated 4 or below

In-state Poor-share rank

#93 of 115

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

Condition distribution

Share of 246 NBI-tracked bridges by lowest applicable component rating.

Good

52% (128)

Fair

33.3% (82)

Poor

14.6% (36)

Gentry County's Poor-condition bridges carry 2,275 vehicle crossings a day

That is 4.2% of the county's reported daily bridge traffic on 14.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 63 crossings a day against 176 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 246 of 246 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

17.5% of Gentry County's bridges have passed the 50-year mark

43 of the 246 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 52% 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 36.2% of the county's Poor-condition bridge traffic

MO 48 E over 3RD FK PLATTE RVR, built 1929, carries 823 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 36-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,275 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

2
1910s

3
1920s

4
1930s

10
1940s

10
1950s

5
1960s

9
1970s

2
1980s

25
1990s

40
2000s

85
2010s

42
2020s

9

What this shows Construction peaked in the 2000s, when 85 of the county's bridges still in the inventory were built, which is 34.6% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1992, 13 years newer than the Missouri average of 1979.

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

The 5 Missouri counties nearest Gentry County in number of bridges, with their condition splits. Its 14.6% Poor share is the 6th-lowest of these 6. Its average build year of 1992 against a peer-group mean of 1981 is 11 years newer.

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

Bridge inventory size and condition shares for Gentry County and the 5 Missouri counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Buchanan County	246	34.1%	58.1%	7.7%	1981
Gentry County (this page)	246	52%	33.3%	14.6%	1992
Pettis County	243	43.6%	45.3%	11.1%	1975
St. Louis city County	240	31.3%	58.8%	10%	1982
Lafayette County	238	31.9%	65.5%	2.5%	1980
DeKalb County	237	35%	56.5%	8.4%	1985

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

Similar inventory size

Nearest county inventories outside MO (246 bridges here).

Cullman County, AL · 246 bridges
Piatt County, IL · 246 bridges
Jackson County, IA · 246 bridges
Jackson County, KS · 246 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 246 Good 128 Fair 82 Poor 36

All bridges (246)

Sort:

Gentry County Bridge Snapshot

Condition distribution

Gentry County's Poor-condition bridges carry 2,275 vehicle crossings a day

17.5% of Gentry County's bridges have passed the 50-year mark

One structure carries 36.2% of the county's Poor-condition bridge traffic

How Gentry 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 (246)

228 TH TRAIL

530 TH ROAD

400 TH ST

415 TH ST

457 TH ST

440 TH ST

445 TH ROAD

440 TH ST

RT A S

DENVER TRAIL

360 TH ST

420 TH ROAD

345 TH ST

240 TH ST

MCCONKEY TRAIL

417 TH ROAD

FLINT AVE

230 TH ST

277 TH ST

512 TH ROAD

OLD HAVANA TRAIL

296 TH ST

470TH RD

472 ND ROAD

RT C S

590 TH ROAD

380 TH ST

RT C S

RT E E

DEGGINGER TRAIL

615 TH ROAD

558 TH ROAD

RT H S

BERLIN ROAD

415 TH ST

RT O E

405 TH ST

MCCONKEY TRAIL

MO 48 E

RT H S

RT T E

RT H S

RT A S

240 TH ST

RT H N

415 TH ST

558 TH ROAD

270 TH ST

285 TH ST

ISAAC MILLER TRAIL

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