County profile · official public datasets

Jasper County, MO

471 public highway bridges tracked in the FHWA National Bridge Inventory: 42% rated Good, 46.9% Fair, 11% Poor.

471
Public bridges: 42%
Good condition: 11%
Poor condition

The verdict

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

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

79th
of 115 on Poor share: 11%
Poor-condition share: 471
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.

Jasper County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Jasper County ranks #79 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11%). Jasper County, Missouri contains 471 public highway bridges. Roughly 42% are rated “Good,” 46.9% “Fair,” and 11% “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

471

Public highway bridges in Jasper County

Good condition

42%

198 of 471 rated 7-9

Fair condition

46.9%

221 of 471 rated 5-6

Poor condition

11%

52 of 471 rated 4 or below

In-state Poor-share rank

#79 of 115

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

Condition distribution

Share of 471 NBI-tracked bridges by lowest applicable component rating.

Good

42% (198)

Fair

46.9% (221)

Poor

11% (52)

Jasper County's Poor-condition bridges carry 233,316 vehicle crossings a day

That is 13.7% of the county's reported daily bridge traffic on 11% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,487 crossings a day against 2,327 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 471 of 471 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

39.3% of Jasper County's bridges have passed the 50-year mark

185 of the 471 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 42% 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 11.7% of the county's Poor-condition bridge traffic

LP 49 S over TURKEY CR, built 1957, carries 27,243 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 52-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 233,316 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

5
1910s

2
1920s

22
1930s

52
1940s

15
1950s

28
1960s

42
1970s

42
1980s

52
1990s

74
2000s

84
2010s

42
2020s

11

What this shows Construction peaked in the 2000s, when 84 of the county's bridges still in the inventory were built, which is 17.8% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year (1978) matches the Missouri average (1979).

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

The 5 Missouri counties nearest Jasper County in number of bridges, with their condition splits. Its 11% Poor share is the 6th-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1980 is in line with the group.

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

Bridge inventory size and condition shares for Jasper County and the 5 Missouri counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Greene County	493	44.6%	50.1%	5.3%	1978
Johnson County	476	39.3%	56.3%	4.4%	1975
Jasper County (this page)	471	42%	46.9%	11%	1978
Clay County	436	38.1%	55%	6.9%	1979
Stoddard County	434	43.1%	53.2%	3.7%	1976
St. Charles County	417	32.4%	64.3%	3.4%	1994

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

Similar inventory size

Nearest county inventories outside MO (471 bridges here).

Onondaga County, NY · 472 bridges
Orange County, NY · 472 bridges
Pierce County, WA · 472 bridges
Pecos County, TX · 470 bridges

Similar average build year

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

Orange County, CA · avg 1978 · 1,164 bridges
Sumner County, KS · avg 1978 · 659 bridges
Allen County, IN · avg 1978 · 613 bridges
Livingston County, IL · avg 1978 · 579 bridges

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

All 471 Good 198 Fair 221 Poor 52

Fair-condition bridges (221)

Sort:

Jasper County Bridge Snapshot

Condition distribution

Jasper County's Poor-condition bridges carry 233,316 vehicle crossings a day

39.3% of Jasper County's bridges have passed the 50-year mark

One structure carries 11.7% of the county's Poor-condition bridge traffic

How Jasper 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 (221)

IS 49 N

MURPHY BLVD/5TH ST

IS 49 N

RT FF E

OR 44 E

IS 49 S

IS 49 N

THIRTEENTH ST

NUTMEG RD E

COUNTY RD 70

CEDAR RD E

RT FF E

IS 44 E

IS 44 W

IVY RD

OSAGE RD

RT M E

RT M E

RT O S

LP 49 S

RT HH E

RP MO249N TO MO171

RP MO171S TO MO249

MO 249 S

IS 44 E

IS 44 W

MO 59 S

RT P E

IS 49 N

IS 44 E

MO 59 S

OR 49 S

RT V E

MO 171 S

MO 171 S

RT MM E

LP 44 E

MO 171 S

MO 66 E

MO 249 N

MO 171 S

MO 171 S

MO 171 S

MO 249 S

MO 249 N

IS 49 N

MURPHY BLVD

MO 66 E

PROSPERITY AVE

MO 171 S

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