County profile · official public datasets

Gasconade County, MO

143 public highway bridges tracked in the FHWA National Bridge Inventory: 32.2% rated Good, 62.9% Fair, 4.9% Poor.

143
Public bridges
32.2%
Good condition
4.9%
Poor condition

The verdict

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

Gasconade County pairs a top-quartile lowest Poor-condition share among rated counties in the state with an older average build year than the state inventory.

Top 17%
lowest Poor share in state
4.9%
Poor-condition share
143
public highway bridges
1972
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.

Gasconade County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Gasconade County ranks #20 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.9%). Gasconade County, Missouri contains 143 public highway bridges. Roughly 32.2% are rated “Good,” 62.9% “Fair,” and 4.9% “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

143

Public highway bridges in Gasconade County

Good condition

32.2%

46 of 143 rated 7-9

Fair condition

62.9%

90 of 143 rated 5-6

Poor condition

4.9%

7 of 143 rated 4 or below

In-state Poor-share rank

#20 of 115

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

Condition distribution

Share of 143 NBI-tracked bridges by lowest applicable component rating.

Good
32.2% (46)
Fair
62.9% (90)
Poor
4.9% (7)

Gasconade County's Poor-condition bridges carry 7,147 vehicle crossings a day

That is 7% of the county's reported daily bridge traffic on 4.9% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 1,021 crossings a day against 645 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 143 of 143 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

55.9% of Gasconade County's bridges have passed the 50-year mark

80 of the 143 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 32.2% 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 32.8% of the county's Poor-condition bridge traffic

US 50 E over GASCONADE RVR, built 1979, carries 2,347 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 7-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 7,147 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Gasconade County's bridges were built

143 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1950s, when 23 of the county's bridges still in the inventory were built, which is 16.1% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1972, 7 years older than the Missouri average of 1979.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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

The 5 Missouri counties nearest Gasconade County in number of bridges, with their condition splits. Its 4.9% Poor share is the 1st-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1974 is in line with the group.

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

Bridge inventory size and condition shares for Gasconade County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
McDonald County 145 11%
Gasconade County (this page) 143 4.9%
Miller County 142 10.6%
St. Clair County 139 19.4%
Ralls County 138 7.2%
Mercer County 137 19%

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

Similar inventory size

Nearest county inventories outside MO (143 bridges here).

Similar average build year

Nearest mean year-built outside MO (1972 here).

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

All 143 Good 46 Fair 90 Poor 7

All bridges (143)

RT B S

Good

Over: BAXTER BR

S 9 T 40 N R 6 W, Gasconade, MO

Built 1938 Load: 23.4 t ADT: 368

HAFERTAFE RD

Good

Over: UNNAMED STR

S 21 T 42 N R 4 W, Gasconade, MO

Built 2021 Load: 25.2 t ADT: 50

REPUBLICAN RD

Good

Over: DRY FORK

S 34 T 41 N R 6 W, Gasconade, MO

Built 2015 Load: 26.1 t ADT: 30

MINT SPRING RD

Good

Over: TRIB BOURBEUSE RVR

S 13 T 40 N R 6 W, Gasconade, MO

Built 2018 Load: 26.1 t ADT: 40

HELDS ISLAND RD

Good

Over: TURKEY CR

S 28 T 44 N R 6 W, Gasconade, MO

Built 1999 Load: 32.4 t ADT: 55

STONY HILL RD

Good

Over: BARREN FK

S 4 T 43 N R 4 W, Gasconade, MO

Built 2007 Load: 32.4 t ADT: 40

BOWEN CEMETERY RD

Good

Over: BOURBEUSE RVR

S 25 T 40 N R 6 W, Gasconade, MO

Built 2014 Load: 32.4 t ADT: 45

KOHRMAN RD

Good

Over: BRUSHY BR

S 2 T 42 N R 6 W, Gasconade, MO

Built 2017 Load: 32.4 t ADT: 25

ROSEBUD RD

Good

Over: BOEUF CR

S 5 T 42 N R 4 W, Gasconade, MO

Built 2017 Load: 32.4 t ADT: 50

NIEWALD RD

Good

Over: SOAP CR

S 19 T 42 N R 4 W, Gasconade, MO

Built 2017 Load: 32.4 t ADT: 50

RT T S

Good

Over: BOUREUSE RVR

S 17 T 41 N R 4 W, Gasconade, MO

Built 2019 Load: 32.4 t ADT: 141

SHOCKLEY RD

Good

Over: UNNAMED STR

S 15 T 42 N R 6 W, Gasconade, MO

Built 2021 Load: 32.4 t ADT: 51

RT W S

Good

Over: PUNCHEON CR

S 36 T 44 N R 6 W, Gasconade, MO

Built 2012 Load: 34.2 t ADT: 252

RT H S

Good

Over: LITTLE BERGER CREE

S 19 T 45 N R 4 W, Gasconade, MO

Built 2014 Load: 34.2 t ADT: 277

BOETTCHER RD

Good

Over: ROCK CR

S 32 T 42 N R 6 W, Gasconade, MO

Built 1997 Load: 35.1 t ADT: 100

RT W S

Good

Over: SECOND CR

S 2 T 43 N R 6 E, Gasconade, MO

Built 2012 Load: 35.1 t ADT: 252

RT A N

Good

Over: CRIDER CR

S 19 T 42 N R 6 W, Gasconade, MO

Built 2016 Load: 35.1 t ADT: 252

TEA RD

Good

Over: TRIB OF BOURBEUSE

S 17 T 41 N R 4 W, Gasconade, MO

Built 2004 Load: 36.0 t ADT: 124

RT EE S

Good

Over: DRY FK CR

S 30 T 41 N R 5 W, Gasconade, MO

Built 2016 Load: 36.0 t ADT: 1,207

US 50 E

Good

Over: SECOND CR

S 12 T 43 N R 6 W, Gasconade, MO

Built 1985 Load: 36.9 t ADT: 2,857

RT EE S

Good

Over: BOURBEUSE RVR

S 18 T 40 N R 5 W, Gasconade, MO

Built 1986 Load: 36.9 t ADT: 697

VALENTINE FORD RD

Good

Over: CRIDER CREEK

S 6 T 42 N R 6 W, Gasconade, MO

Built 2021 Load: 39.6 t ADT: 20

RT H S

Good

Over: OVER FORK CREEK

S 5 T 44 N R 4 W, Gasconade, MO

Built 2014 Load: 40.5 t ADT: 253

OLD FERRY RD

Good

Over: RICHLAND CR

S 6 T 44 N R 6 W, Gasconade, MO

Built 2001 Load: 41.4 t ADT: 80

RT A S

Good

Over: ROCK CR

S 32 T 42 N R 6 W, Gasconade, MO

Built 2004 Load: 41.4 t ADT: 252

RT A S

Good

Over: CLEAR CR

S 32 T 42 N R 6 W, Gasconade, MO

Built 2004 Load: 45.0 t ADT: 252

DRAKE SCHOOL RD

Good

Over: TRIB OF BARREN FOR

S 6 T 43 N R 4 W, Gasconade, MO

Built 2006 Load: 45.9 t ADT: 25

US 50 E

Good

Over: SCHULTE CR

S 7 T 43 N R 5 W, Gasconade, MO

Built 1985 Load: 45.9 t ADT: 2,857

RT J E

Good

Over: FIRST CREEK

S 19 T 45 N R 5 W, Gasconade, MO

Built 2020 Load: 45.9 t ADT: 399

RT A S

Good

Over: THIRD CREEK

S 6 T 42 N R 6 W, Gasconade, MO

Built 2020 Load: 46.8 t ADT: 319

MO 100 E

Good

Over: FRENE CR

S 35 T 46 N R 5 W, Gasconade, MO

Built 2006 Load: 51.3 t ADT: 5,747

MO 100 E

Good

Over: LIT BERGER CR

S 4 T 45 N R 4 W, Gasconade, MO

Built 2017 Load: 51.3 t ADT: 3,082

FRENE CREEK RD

Good

Over: TRIB OF FRENE CR

S 10 T 45 N R 5 W, Gasconade, MO

Built 2005 Load: 53.1 t ADT: 100

MO 19 S

Good

Over: SECOND CR

S 27 T 43 N R 5 W, Gasconade, MO

Built 2016 Load: 53.1 t ADT: 2,870

DOLL RD

Good

Over: UNNAMED STR

S 6 T 44 N R 4 W, Gasconade, MO

Built 2021 Load: 53.1 t ADT: 25

ENKE RD

Good

Over: BOURBEUSE RVR

S 2 T 40 N R 5 W, Gasconade, MO

Built 1996 Load: 55.8 t ADT: 50

RT B S

Poor

Over: DRY FK CR

S 29 T 41 N R 6 W, Gasconade, MO

Built 1964 Load: 11.7 t ADT: 820

ROHLFING RD

Poor

Over: LIT BERGER CR

S 8 T 45 N R 4 W, Gasconade, MO

Built 1958 Load: 13.5 t ADT: 40

RUSKAUP RD

Poor

Over: SECOND CR

S 7 T 43 N R 5 W, Gasconade, MO

Built 1925 Load: 17.1 t ADT: 100

MO 100 E

Poor

Over: BAILEY CR

S 6 T 45 N R 6 W, Gasconade, MO

Built 1948 Load: 18.0 t ADT: 320

US 50 E

Poor

Over: GASCONADE RVR

S 19 T 43 N R 6 W, Gasconade, MO

Built 1979 Load: 30.6 t ADT: 2,347

RT Y E

Poor

Over: CEDAR BR

S 36 T 42 N R 6 W, Gasconade, MO

Built 1957 Load: 30.6 t ADT: 1,357

MO 19 S

Poor

Over: BOURBEUSE RVR

S 11 T 40 N R 5 W, Gasconade, MO

Built 1988 Load: 36.9 t ADT: 2,163

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.