County profile · official public datasets

Pettis County, MO

243 public highway bridges tracked in the FHWA National Bridge Inventory: 43.6% rated Good, 45.3% Fair, 11.1% Poor.

243
Public bridges
43.6%
Good condition
11.1%
Poor condition

The verdict

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

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

80th
of 115 on Poor share
11.1%
Poor-condition share
243
public highway bridges
1975
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.

Pettis County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Pettis County ranks #80 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.1%). Pettis County, Missouri contains 243 public highway bridges. Roughly 43.6% are rated “Good,” 45.3% “Fair,” and 11.1% “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

243

Public highway bridges in Pettis County

Good condition

43.6%

106 of 243 rated 7-9

Fair condition

45.3%

110 of 243 rated 5-6

Poor condition

11.1%

27 of 243 rated 4 or below

In-state Poor-share rank

#80 of 115

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

Condition distribution

Share of 243 NBI-tracked bridges by lowest applicable component rating.

Good
43.6% (106)
Fair
45.3% (110)
Poor
11.1% (27)

Pettis County's Poor-condition bridges carry 21,387 vehicle crossings a day

That is 7.7% of the county's reported daily bridge traffic on 11.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 792 crossings a day against 453 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 243 of 243 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

47.7% of Pettis County's bridges have passed the 50-year mark

116 of the 243 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 43.6% 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 40.2% of the county's Poor-condition bridge traffic

US 50 E over MUDDY CR, built 1972, carries 8,593 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 27-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 21,387 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Pettis County's bridges were built

243 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 2010s, when 36 of the county's bridges still in the inventory were built, which is 14.8% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year (1975) matches the Missouri average (1979).

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

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

The 5 Missouri counties nearest Pettis County in number of bridges, with their condition splits. Its 11.1% Poor share is the 5th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1984 is 9 years older.

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

Bridge inventory size and condition shares for Pettis County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
Buchanan County 246 7.7%
Gentry County 246 14.6%
Pettis County (this page) 243 11.1%
St. Louis city County 240 10%
Lafayette County 238 2.5%
DeKalb County 237 8.4%

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

Similar inventory size

Nearest county inventories outside MO (243 bridges here).

Similar average build year

Nearest mean year-built outside MO (1975 here).

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

All 243 Good 106 Fair 110 Poor 27

Poor-condition bridges (27)

E PRARIE GROVE RD

Poor

Over: S FORK

S 5 T 46 N R 23 W, Pettis, MO

Built 1930 Load: 0.0 t ADT: 30

RICHEY RD

Poor

Over: LIT MUDDY CR

S 16 T 46 N R 22 W, Pettis, MO

Built 1976 Load: 0.0 t ADT: 6

BOONVILLE RD

Poor

Over: SHAVER CR

S 35 T 46 N R 20 W, Pettis, MO

Built 1910 Load: 0.0 t ADT: 35

BENNETT RD

Poor

Over: FLAT CR

S 29 T 44 N R 22 W, Pettis, MO

Built 1915 Load: 0.0 t ADT: 30

WASHINGTON ST

Poor

Over: UP RR

S 5 T 45 N R 21 W, Pettis, MO

Built 1920 Load: 0.0 t ADT: 500

MAIN ST

Poor

Over: MUDDY CR

S 3 T 45 N R 23 W, Pettis, MO

Built 1915 Load: 0.0 t ADT: 20

GLENN RD

Poor

Over: SHAVER CR

S 15 T 46 N R 20 W, Pettis, MO

Built 1960 Load: 2.7 t ADT: 35

MCCURDY RD

Poor

Over: SMALL CR

S 31 T 47 N R 21 W, Pettis, MO

Built 1925 Load: 3.6 t ADT: 30

FOWLER RD

Poor

Over: SMALL BR

S 23 T 47 N R 22 W, Pettis, MO

Built 1925 Load: 4.5 t ADT: 50

WM PARKHURST DR

Poor

Over: CREEK

S 33 T 46 N R 21 W, Pettis, MO

Built 1978 Load: 4.5 t ADT: 100

MCCUBBIN RD

Poor

Over: HEATHS CR

S 2 T 47 N R 22 W, Pettis, MO

Built 1974 Load: 5.4 t ADT: 30

SOUTHFORK RD

Poor

Over: S FORK

S 26 T 48 N R 23 W, Pettis, MO

Built 1964 Load: 6.3 t ADT: 168

WALNUT GROVE RD

Poor

Over: LIT MUDDY CR

S 11 T 46 N R 22 W, Pettis, MO

Built 1940 Load: 6.3 t ADT: 50

MCVEY RD

Poor

Over: SMALL CR

S 14 T 45 N R 21 W, Pettis, MO

Built 1920 Load: 6.3 t ADT: 400

ELM BRANCH RD

Poor

Over: WINDSOR CTY LK SPL

S 7 T 43 N R 23 W, Pettis, MO

Built 1925 Load: 7.2 t ADT: 100

CARPENTER RD

Poor

Over: MCGEE BR

S 33 T 45 N R 20 W, Pettis, MO

Built 1925 Load: 9.0 t ADT: 15

CHEVALIER RD

Poor

Over: MUDDY CR

S 30 T 46 N R 22 W, Pettis, MO

Built 1930 Load: 9.9 t ADT: 30

PLEASANT VIEW RD

Poor

Over: S FLAT CR

S 8 T 43 N R 22 W, Pettis, MO

Built 1925 Load: 16.2 t ADT: 30

TANEY RD

Poor

Over: TRIB OF SEWER BR

S 10 T 46 N R 21 W, Pettis, MO

Built 1926 Load: 16.2 t ADT: 15

SWOPE RD

Poor

Over: CEDAR CR

S 15 T 46 N R 21 W, Pettis, MO

Built 1926 Load: 16.2 t ADT: 35

ANDERSON SCHOOL RD

Poor

Over: SPRING FK

S 4 T 44 N R 21 W, Pettis, MO

Built 1974 Load: 19.8 t ADT: 200

WHITE RD

Poor

Over: SMALL CR

S 12 T 44 N R 23 W, Pettis, MO

Built 1935 Load: 22.5 t ADT: 40

US 65 S

Poor

Over: TURKEY CR

S 33 T 47 N R 21 W, Pettis, MO

Built 1964 Load: 25.2 t ADT: 4,696

RT H S

Poor

Over: SEWER BR

S 21 T 46 N R 21 W, Pettis, MO

Built 1927 Load: 27.0 t ADT: 1,090

US 65 N

Poor

Over: MUDDY CR

S 33 T 47 N R 21 W, Pettis, MO

Built 1977 Load: 31.5 t ADT: 4,659

US 50 E

Poor

Over: MUDDY CR

S 35 T 46 N R 22 W, Pettis, MO

Built 1972 Load: 32.4 t ADT: 8,593

S GRAND AVE

Poor

Over: FLAT CR

S 21 T 45 N R 21 W, Pettis, MO

Built 1920 Load: 38.7 t ADT: 400

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

Related

Browse all → | Rankings →
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.