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)

IS 55 N

Good

Over: UNKNOWN RR

S 1916 T 40 N R 6 E, Jefferson, MO

Built 1969 Load: 36.9 t ADT: 16,639

MO 21 N

Good

Over: ROCK CR

S 1974 T 43 N R 5 E, Jefferson, MO

Built 1987 Load: 36.9 t ADT: 11,430

OLD HWY A

Good

Over: JOACHIM CR

S 1 T 40 N R 5 E, Jefferson, MO

Built 2003 Load: 36.9 t ADT: 2,000

HBORO HOUSE SPR

Good

Over: TRIB OF BELEW CR

S 3 T 41 N R 4 E, Jefferson, MO

Built 2009 Load: 36.9 t ADT: 652

RUSSELL RD

Good

Over: DRY CR

S 23 T 40 N R 3 E, Jefferson, MO

Built 2011 Load: 36.9 t ADT: 212

SANDY CHURCH RD

Good

Over: TRIB OF SANDY CR

S 29 T 41 N R 5 W, Jefferson, MO

Built 2013 Load: 36.9 t ADT: 723

CASTLE RANCH RD

Good

Over: TRIB TO COTTER CR

S 22 T 40 N R 4 E, Jefferson, MO

Built 2014 Load: 36.9 t ADT: 467

OLD HWY 141

Good

Over: ROMAINE CR

S 664 T 43 N R 5 E, Jefferson, MO

Built 1934 Load: 37.8 t ADT: 50

RT Z E

Good

Over: SANDY CR

S 421 T 41 N R 5 E, Jefferson, MO

Built 2003 Load: 37.8 t ADT: 8,584

TURLEY RD

Good

Over: TRIB OF BIG RVR

S 3 T 39 N R 3 E, Jefferson, MO

Built 2011 Load: 37.8 t ADT: 32

MAMMOTH RD

Good

Over: TRIB OF BIG RVR

S 11 T 39 N R 3 E, Jefferson, MO

Built 2010 Load: 37.8 t ADT: 221

FOUNTAIN CITY RD

Good

Over: TRIB OF JOACHIM CR

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

Built 2014 Load: 37.8 t ADT: 194

VOGEL RD

Good

Over: POMME CR

S 36 T 43 N R 5 E, Jefferson, MO

Built 2016 Load: 37.8 t ADT: 3,944

RT W S

Good

Over: SPRING BR

S 19 T 43 N R 4 E, Jefferson, MO

Built 1952 Load: 37.8 t ADT: 6,922

PLATTIN RD

Good

Over: TRIB TO PLATTIN CR

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

Built 2007 Load: 38.7 t ADT: 500

JIM WEBER RD

Good

Over: ANTIRE CR

S 10 T 43 N R 4 E, Jefferson, MO

Built 2004 Load: 38.7 t ADT: 522

KONERT RD

Good

Over: ROMAINE CR

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

Built 2015 Load: 38.7 t ADT: 2,527

HILLSBORO HOUSE SP

Good

Over: TRIB TO BELEW CR

S 10 T 41 N R 4 E, Jefferson, MO

Built 2020 Load: 38.7 t ADT: 400

LIONS DEN RD

Good

Over: ROCK CR

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

Built 1997 Load: 39.6 t ADT: 3,061

SUGAR CR RD

Good

Over: TRIB TO SALINE CR

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

Built 2007 Load: 39.6 t ADT: 8,818

HBORO HOUSE SPRG

Good

Over: HEADS CR

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

Built 2009 Load: 40.5 t ADT: 2,000

DUTCH CR RD

Good

Over: TRIB TO BUCK CR

S 14 T 42 N R 3 E, Jefferson, MO

Built 2011 Load: 40.5 t ADT: 1,049

IS 55 S

Good

Over: CST FIFTH ST BNSF RR

S 416 T 40 N R 6 E, Jefferson, MO

Built 2011 Load: 40.5 t ADT: 68,501

KRAMME RD

Good

Over: CALVEY CR

S 6 T 41 N R 3 E, Jefferson, MO

Built 2016 Load: 40.5 t ADT: 30

REYNOLDS CR RD

Good

Over: TRIB TO DRY CR

S 35 T 41 N R 3 E, Jefferson, MO

Built 2007 Load: 41.4 t ADT: 503

IS 55 S

Good

Over: RT M GLAIZE CR

S 25 T 42 N R 6 E, Jefferson, MO

Built 2010 Load: 41.4 t ADT: 42,132

SANDY VALLEY

Good

Over: BIG CRK

S 30 T 41 N R 5 E, Jefferson, MO

Built 2021 Load: 41.4 t ADT: 700

IS 55 N

Good

Over: ROCK CR

S 2024 T 42 N R 6 E, Jefferson, MO

Built 2001 Load: 42.3 t ADT: 62,016

MO 21 N

Good

Over: CRD HAYDEN RD

S 23 T 41 N R 4 E, Jefferson, MO

Built 2007 Load: 42.3 t ADT: 9,871

OLD LEMAY FERRY RD

Good

Over: TRIB TO GLAIZE CR

S 32 T 42 N R 5 E, Jefferson, MO

Built 2016 Load: 42.3 t ADT: 1,179

MO 30 E

Good

Over: DULIN CR

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

Built 1988 Load: 42.3 t ADT: 11,835

MO 21 S

Good

Over: CRD HAYDEN RD

S 23 T 41 N R 4 E, Jefferson, MO

Built 2007 Load: 43.2 t ADT: 8,809

RT WW S

Good

Over: MAUPIN CR

S 36 T 41 N R 2 E, Jefferson, MO

Built 2010 Load: 43.2 t ADT: 1,605

DOC SARGENT RD

Good

Over: LABARQUE CR

S 33 T 43 N R 3 E, Jefferson, MO

Built 2020 Load: 43.2 t ADT: 368

IS 55 S

Good

Over: ROCK CR

S 2024 T 42 N R 6 E, Jefferson, MO

Built 2001 Load: 44.1 t ADT: 52,260

MO 21 S

Good

Over: CRD LONEDELL RD

S 22 T 43 N R 5 E, Jefferson, MO

Built 1987 Load: 44.1 t ADT: 11,035

GLADE CHAPEL RD E

Good

Over: MO 21

S 12 T 41 N R 4 E, Jefferson, MO

Built 2007 Load: 44.1 t ADT: 538

US 61 S

Good

Over: UP RR

S 226 T 41 N R 6 E, Jefferson, MO

Built 2002 Load: 45.0 t ADT: 8,249

MISSISSIPPI AVE

Good

Over: BNSF RR

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

Built 2003 Load: 45.0 t ADT: 1,200

KINGSTON ST

Good

Over: JOACHIM CR

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

Built 2012 Load: 45.9 t ADT: 500

HARNESS RD

Good

Over: TRIB HOCUM HOLLOW

S 1258 T 39 N R 6 E, Jefferson, MO

Built 2022 Load: 45.9 t ADT: 400

HILLSBORO H SPR RD

Good

Over: TRIB OF BELEW CR

S 34 T 42 N R 4 E, Jefferson, MO

Built 2014 Load: 46.8 t ADT: 1,100

MVILLE HEMATITE

Good

Over: LITTLE CR

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

Built 2014 Load: 46.8 t ADT: 700

EIME RD

Good

Over: WINE CR

S 28 T 42 N R 3 E, Jefferson, MO

Built 2018 Load: 46.8 t ADT: 268

RT MM E

Good

Over: HEADS CR

S 666 T 42 N R 4 E, Jefferson, MO

Built 2000 Load: 47.7 t ADT: 12,272

RP MO21N TO HAYDEN

Good

Over: SANDY CR

S 23 T 41 N R 4 E, Jefferson, MO

Built 2006 Load: 47.7 t ADT: 364

TOM FROST RD

Good

Over: BR OF CALVEY CR

S 24 T 42 N R 2 E, Jefferson, MO

Built 2005 Load: 47.7 t ADT: 168

OLD HWY 21 S

Good

Over: MO 21

S 2 T 41 N R 4 E, Jefferson, MO

Built 2007 Load: 47.7 t ADT: 2,095

ARMBRUSTER RD

Good

Over: HAVERSTICK CRK

S 4 T 39 N R 5 E, Jefferson, MO

Built 2022 Load: 47.7 t ADT: 347

MO 21 S

Good

Over: RT M

S 18 T 42 N R 5 E, Jefferson, MO

Built 1997 Load: 47.7 t ADT: 8,930

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.