County profile · official public datasets

Jefferson County, MO

411 public highway bridges tracked in the FHWA National Bridge Inventory: 33.6% rated Good, 63% Fair, 3.4% Poor.

411
Public bridges
33.6%
Good condition
3.4%
Poor condition

The verdict

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

Jefferson County posts a top-10% lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 6%
lowest Poor share in state
3.4%
Poor-condition share
411
public highway bridges
1981
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.

Jefferson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Jefferson County ranks #7 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.4%). Jefferson County, Missouri contains 411 public highway bridges. Roughly 33.6% are rated “Good,” 63% “Fair,” and 3.4% “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

411

Public highway bridges in Jefferson County

Good condition

33.6%

138 of 411 rated 7-9

Fair condition

63%

259 of 411 rated 5-6

Poor condition

3.4%

14 of 411 rated 4 or below

In-state Poor-share rank

#7 of 115

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

Condition distribution

Share of 411 NBI-tracked bridges by lowest applicable component rating.

Good
33.6% (138)
Fair
63% (259)
Poor
3.4% (14)

Jefferson County's Poor-condition bridges carry 27,632 vehicle crossings a day

That is 0.9% of the county's reported daily bridge traffic on 3.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,974 crossings a day against 5,135 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 411 of 411 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

33.3% of Jefferson County's bridges have passed the 50-year mark

137 of the 411 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 33.6% 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 29.9% of the county's Poor-condition bridge traffic

US 61 S over JOACHIM CR, built 1933, carries 8,249 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 14-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 27,632 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Jefferson County's bridges were built

411 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 2000s, when 84 of the county's bridges still in the inventory were built, which is 20.4% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year (1981) matches the Missouri average (1979).

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

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

The 5 Missouri counties nearest Jefferson County in number of bridges, with their condition splits. Its 3.4% Poor share is the 2nd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1986 is 5 years older.

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

Bridge inventory size and condition shares for Jefferson County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
Clay County 436 6.9%
Stoddard County 434 3.7%
St. Charles County 417 3.4%
Jefferson County (this page) 411 3.4%
Vernon County 401 4.2%
Nodaway County 396 14.4%

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

Similar inventory size

Nearest county inventories outside MO (411 bridges here).

Similar average build year

Nearest mean year-built outside MO (1981 here).

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

All 411 Good 138 Fair 259 Poor 14

Good-condition bridges (138)

MO 21 N

Good

Over: RT BB

S 33 T 41 N R 4 E, Jefferson, MO

Built 2003 Load: 48.6 t ADT: 9,486

MO 21 S

Good

Over: RT BB

S 33 T 41 N R 4 E, Jefferson, MO

Built 2003 Load: 48.6 t ADT: 9,038

BUSHBERG RD

Good

Over: TRIB OF MISSISSIPP

S 5 T 41 N R 6 E, Jefferson, MO

Built 2007 Load: 48.6 t ADT: 39

STROUP RD

Good

Over: LITTLE CREEK

S 5 T 40 N R 5 E, Jefferson, MO

Built 2016 Load: 48.6 t ADT: 400

RT M W

Good

Over: CRD OLD HWY M

S 20 T 42 N R 5 E, Jefferson, MO

Built 1996 Load: 48.6 t ADT: 6,617

MISSISSIPPI AVE

Good

Over: UP RR

S 5 T 40 N R 6 E, Jefferson, MO

Built 2013 Load: 49.5 t ADT: 1,000

SYCAMORE LANE

Good

Over: BEAR CRK

S 35 T 43 N R 4 E, Jefferson, MO

Built 2022 Load: 49.5 t ADT: 300

RT M E

Good

Over: MOSS HOLLOW CR

S 355 T 42 N R 5 E, Jefferson, MO

Built 1996 Load: 49.5 t ADT: 6,237

RP HAYDEN RD TO MO

Good

Over: SANDY CR

S 22 T 41 N R 4 E, Jefferson, MO

Built 2006 Load: 50.4 t ADT: 370

RT M E

Good

Over: CRD OLD HWY M

S 20 T 42 N R 5 E, Jefferson, MO

Built 1996 Load: 50.4 t ADT: 6,237

KLONDIKE RD

Good

Over: BELEWS CR

S 29 T 41 N R 4 E, Jefferson, MO

Built 2016 Load: 51.3 t ADT: 182

RT B S

Good

Over: SKULLBONE CR

S 897 T 42 N R 3 E, Jefferson, MO

Built 2005 Load: 52.2 t ADT: 4,365

OLD HWY 110

Good

Over: JOACHIM CR

S 35 T 40 N R 4 E, Jefferson, MO

Built 2007 Load: 52.2 t ADT: 4,083

JOACHIM AVE

Good

Over: JOACHIM CR

S 29 T 41 N R 6 E, Jefferson, MO

Built 2006 Load: 53.1 t ADT: 1,500

DOSS HOLLOW RD

Good

Over: TRIB TO PLATTIN CR

S 21 T 39 N R 6 E, Jefferson, MO

Built 2022 Load: 53.1 t ADT: 329

RT M W

Good

Over: MOSS HOLLOW CR

S 355 T 42 N R 5 E, Jefferson, MO

Built 1996 Load: 53.1 t ADT: 6,617

US 61 N

Good

Over: KOCHS CR

S 6 T 41 N R 6 E, Jefferson, MO

Built 2011 Load: 54.0 t ADT: 5,612

CHARTER CHURCH RD

Good

Over: PLATTIN CR

S 12 T 39 N R 5 E, Jefferson, MO

Built 2018 Load: 54.0 t ADT: 277

ROCK CR GARDENS RD

Good

Over: ROCK CR

S 34 T 43 N R 5 E, Jefferson, MO

Built 2018 Load: 54.0 t ADT: 50

SCHUMACHER RD

Good

Over: TRIB TO SALINE CR

S 13 T 43 N R 4 E, Jefferson, MO

Built 2017 Load: 55.8 t ADT: 1,400

BIG HOLLOW RD

Good

Over: SALINE CR

S 6 T 39 N R 7 E, Jefferson, MO

Built 2017 Load: 56.7 t ADT: 400

WHITEHEAD RD

Good

Over: TRIB OF COTTER CR

S 21 T 40 N R 4 E, Jefferson, MO

Built 2014 Load: 57.6 t ADT: 300

S MAIN ST

Good

Over: TANYARD BR

S 2 T 39 N R 4 E, Jefferson, MO

Built 2017 Load: 57.6 t ADT: 1,000

WHITEHEAD RD

Good

Over: TRIB TO COTTER CR

S 16 T 40 N R 4 E, Jefferson, MO

Built 2020 Load: 57.6 t ADT: 300

CHARTER CHURCH RD

Good

Over: PLATTIN CR

S 25 T 39 N R 5 E, Jefferson, MO

Built 2020 Load: 57.6 t ADT: 400

ROUGGLY-KIEPE RD

Good

Over: TRIB TO SALINE CR

S 1 T 39 N R 6 E, Jefferson, MO

Built 2021 Load: 57.6 t ADT: 100

MANESS ROAD

Good

Over: DRY CR

S 36 T 40 N R 3 E, Jefferson, MO

Built 2016 Load: 58.5 t ADT: 160

DRY FORK EAST RD

Good

Over: TRIB TO GLAIZE CR

S 9 T 42 N R 5 E, Jefferson, MO

Built 2017 Load: 58.5 t ADT: 15

RICHARDSON RD E

Good

Over: BNSF RR

S 2291 T 43 N R 6 E, Jefferson, MO

Built 1998 Load: 61.2 t ADT: 29,553

HILSBORO HOUSE SPR

Good

Over: BOURNE CRK

S 22 T 42 N R 4 E, Jefferson, MO

Built 2022 Load: 64.8 t ADT: 1,503

COMMERCE DRIVE

Good

Over: BLACK CRK

S 6 T 42 N R 6 E, Jefferson, MO

Built 2024 Load: 69.3 t ADT: 400

SCHNEIDER ST

Good

Over: SUGAR CR

S 3011 T 43 N R 5 E, Jefferson, MO

Built 2014 Load: 71.1 t ADT: 400

ALLEN ROAD

Good

Over: SANDY CRK

S 907 T 41 N R 5 E, Jefferson, MO

Built 2023 Load: 71.1 t ADT: 200

W MAIN ST

Good

Over: TRIB OF PLATTIN CR

S 6 T 40 N R 6 E, Jefferson, MO

Built 2007 Load: 89.1 t ADT: 4,546

RT P S

Good

Over: TRIB OF JOACHIM CR

S 18 T 40 N R 5 E, Jefferson, MO

Built 2006 Load: 90.0 t ADT: 2,571

MO 30 E

Good

Over: SALINE CR

S 1331 T 43 N R 5 E, Jefferson, MO

Built 2019 Load: 91.8 t ADT: 40,373

ST. JOSEPH HILLS

Good

Over: TRIB OF LABARQUE C

S 4 T 42 N R 4 W, Jefferson, MO

Built 2003 Load: 99.9 t ADT: 59

RT V S

Good

Over: JOACHIM CR

S 4 T 38 N R 5 E, Jefferson, MO

Built 2020 Load: 99.9 t ADT: 656

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.