County profile · official public datasets

Lewis County, MO

171 public highway bridges tracked in the FHWA National Bridge Inventory: 28.7% rated Good, 66.1% Fair, 5.3% Poor.

171
Public bridges
28.7%
Good condition
5.3%
Poor condition

The verdict

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

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

Top 21%
lowest Poor share in state
5.3%
Poor-condition share
171
public highway bridges
1990
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.

Lewis County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Lewis County ranks #24 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.3%). Lewis County, Missouri contains 171 public highway bridges. Roughly 28.7% are rated “Good,” 66.1% “Fair,” and 5.3% “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

171

Public highway bridges in Lewis County

Good condition

28.7%

49 of 171 rated 7-9

Fair condition

66.1%

113 of 171 rated 5-6

Poor condition

5.3%

9 of 171 rated 4 or below

In-state Poor-share rank

#24 of 115

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

Condition distribution

Share of 171 NBI-tracked bridges by lowest applicable component rating.

Good
28.7% (49)
Fair
66.1% (113)
Poor
5.3% (9)

Lewis County's Poor-condition bridges carry 368 vehicle crossings a day

That is 0.2% of the county's reported daily bridge traffic on 5.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 41 crossings a day against 666 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 171 of 171 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

22.8% of Lewis County's bridges have passed the 50-year mark

39 of the 171 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 28.7% 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 34.8% of the county's Poor-condition bridge traffic

RT H S over MID FABIUS RVR, built 1961, carries 128 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 9-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 368 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Lewis County's bridges were built

171 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 53 of the county's bridges still in the inventory were built, which is 31% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1990, 11 years newer than the Missouri average of 1979.

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

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

The 5 Missouri counties nearest Lewis County in number of bridges, with their condition splits. Its 5.3% Poor share is the 2nd-lowest of these 6. Its average build year of 1990 against a peer-group mean of 1978 is 12 years newer.

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

Bridge inventory size and condition shares for Lewis County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
Clark County 178 7.9%
Lewis County (this page) 171 5.3%
Holt County 167 15%
Knox County 167 4.2%
Barry County 166 15.1%
St. Francois County 165 10.3%

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

Similar inventory size

Nearest county inventories outside MO (171 bridges here).

Similar average build year

Nearest mean year-built outside MO (1990 here).

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

All 171 Good 49 Fair 113 Poor 9

All bridges (171)

COUNTY RD 572

Fair

Over: OYSTER BR

S 1 T 60 N R 6 W, Lewis, MO

Built 1998 Load: 63.9 t ADT: 100

COUNTY RD 463

Fair

Over: BRANCH

S 36 T 63 N R 7 W, Lewis, MO

Built 1998 Load: 63.9 t ADT: 15

US 61 S

Fair

Over: BLAND BR CK

S 11 T 62 N R 6 W, Lewis, MO

Built 2005 Load: 64.8 t ADT: 13,836

US 61 S

Fair

Over: UNNAMED CR

S 2 T 62 N R 6 W, Lewis, MO

Built 2005 Load: 64.8 t ADT: 13,836

US 61 S

Fair

Over: UNNAMED CR

S 2 T 62 N R 6 W, Lewis, MO

Built 2005 Load: 64.8 t ADT: 13,836

COUNTY RD 219

Fair

Over: GRASSY CR

S 30 T 61 N R 8 W, Lewis, MO

Built 1999 Load: 67.5 t ADT: 30

COUNTY RD 505

Fair

Over: BRANCH

S 23 T 61 N R 8 W, Lewis, MO

Built 2007 Load: 67.5 t ADT: 35

COUNTY RD 479

Fair

Over: BRANCH

S 26 T 63 N R 7 W, Lewis, MO

Built 1999 Load: 71.1 t ADT: 5

COUNTY RD 572

Fair

Over: DURGENS CR

S 9 T 60 N R 6 W, Lewis, MO

Built 1993 Load: 72.0 t ADT: 65

COUNTY RD 505

Fair

Over: BR OF MID FABIUS R

S 23 T 61 N R 8 W, Lewis, MO

Built 1998 Load: 90.0 t ADT: 25

US 61 S

Fair

Over: ARTESIAN BR CR

S 14 T 62 N R 6 W, Lewis, MO

Built 2005 Load: 93.6 t ADT: 8,404

COUNTY RD 264

Fair

Over: GRASSY CR

S 20 T 60 N R 7 W, Lewis, MO

Built 2000 Load: 95.4 t ADT: 30

US 61 S

Fair

Over: BIG BR CR

S 26 T 63 N R 6 W, Lewis, MO

Built 1999 Load: 99.9 t ADT: 13,836

COUNTY RD 248

Good

Over: TROUBLESOME CR

S 29 T 60 N R 8 W, Lewis, MO

Built 1990 Load: 12.6 t ADT: 35

COUNTY RD 357

Good

Over: REDDISH BR MID FAB

S 34 T 62 N R 9 W, Lewis, MO

Built 1991 Load: 14.4 t ADT: 35

SUNFLOWER ST E

Good

Over: US 61

S 14 T 61 N R 6 W, Lewis, MO

Built 1974 Load: 18.0 t ADT: 142

RT E E

Good

Over: WYACONDA RVR

S 1 T 62 N R 7 W, Lewis, MO

Built 1962 Load: 18.0 t ADT: 128

COUNTY RD 456

Good

Over: SUGAR CR

S 30 T 63 N R 7 W, Lewis, MO

Built 1993 Load: 18.9 t ADT: 35

RT V E

Good

Over: N FABIUS RVR

S 28 T 60 N R 6 W, Lewis, MO

Built 1964 Load: 22.5 t ADT: 420

RT N S

Good

Over: GRASSY CR

S 19 T 60 N R 7 W, Lewis, MO

Built 1961 Load: 22.5 t ADT: 554

COUNTY RD 261

Good

Over: LIT GRASSY CR

S 8 T 60 N R 8 W, Lewis, MO

Built 1990 Load: 27.0 t ADT: 15

COUNTY RD 224

Good

Over: GRASSY CR

S 2 T 60 N R 8 W, Lewis, MO

Built 1988 Load: 27.0 t ADT: 65

RT C E

Good

Over: MIDDLE FABIUS RVR

S 5 T 60 N R 7 W, Lewis, MO

Built 2003 Load: 27.0 t ADT: 680

COUNTY RD 490

Good

Over: BR OF WYACONDA RVR

S 29 T 63 N R 6 W, Lewis, MO

Built 1995 Load: 30.6 t ADT: 35

US 61 S

Good

Over: RT B

S 11 T 60 N R 6 W, Lewis, MO

Built 1974 Load: 30.6 t ADT: 5,740

COUNTY RD 228

Good

Over: GRASSY CR

S 12 T 60 N R 8 W, Lewis, MO

Built 1997 Load: 31.5 t ADT: 50

RT B S

Good

Over: WYACONDA RVR

S 30 T 61 N R 5 W, Lewis, MO

Built 2013 Load: 31.5 t ADT: 686

COUNTY RD 587

Good

Over: MID FABIUS RVR

S 30 T 60 N R 6 W, Lewis, MO

Built 1999 Load: 32.4 t ADT: 100

HAWTHORN ST (508)

Good

Over: MID FABIUS RVR

S 31 T 61 N R 7 W, Lewis, MO

Built 2016 Load: 32.4 t ADT: 25

MO 156 E

Good

Over: BIG GRASSY CR

S 13 T 60 N R 8 W, Lewis, MO

Built 2011 Load: 33.3 t ADT: 630

COUNTY RD 588

Good

Over: DURGENS CR

S 15 T 60 N R 6 W, Lewis, MO

Built 2013 Load: 33.3 t ADT: 50

RT K E

Good

Over: MIDDLE FABIUS RVR

S 8 T 62 N R 9 W, Lewis, MO

Built 2021 Load: 33.3 t ADT: 734

RT E E

Good

Over: DERRAHS BR

S 27 T 63 N R 7 W, Lewis, MO

Built 2022 Load: 33.3 t ADT: 192

COUNTY RD 419

Good

Over: BR OF SUGAR CR

S 12 T 62 N R 8 W, Lewis, MO

Built 1993 Load: 34.2 t ADT: 75

COUNTY RD 297

Good

Over: UNNAMED CREEK

S 40 T 62 N R 9 W, Lewis, MO

Built 2019 Load: 34.2 t ADT: 15

COUNTY RD 436

Good

Over: WYACONDA RVR

S 7 T 62 N R 6 W, Lewis, MO

Built 2009 Load: 35.1 t ADT: 40

COUNTY RD 297

Good

Over: UNNAMED CR

S 35 T 60 N R 7 W, Lewis, MO

Built 2019 Load: 35.1 t ADT: 75

RT J S

Good

Over: BIG GRASSY CR

S 29 T 61 N R 8 W, Lewis, MO

Built 2022 Load: 35.1 t ADT: 137

COUNTY RD 403

Good

Over: SUGAR CR

S 9 T 62 N R 7 W, Lewis, MO

Built 1994 Load: 36.9 t ADT: 35

RT E E

Good

Over: SUGAR CR

S 24 T 63 N R 8 W, Lewis, MO

Built 2022 Load: 36.9 t ADT: 192

COUNTY RD 242

Good

Over: SEEBERS BR

S 20 T 60 N R 9 W, Lewis, MO

Built 2003 Load: 37.8 t ADT: 30

COUNTY RD 575

Good

Over: MID FABIUS RVR

S 24 T 60 N R 7 W, Lewis, MO

Built 1996 Load: 39.6 t ADT: 60

RT E E

Good

Over: N FABIUS RVR

S 25 T 63 N R 9 W, Lewis, MO

Built 2005 Load: 39.6 t ADT: 226

RT C E

Good

Over: N FABIUS RVR

S 34 T 61 N R 7 W, Lewis, MO

Built 2006 Load: 39.6 t ADT: 449

COUNTY RD 374

Good

Over: COOPER BR

S 34 T 63 N R 9 W, Lewis, MO

Built 2004 Load: 40.5 t ADT: 40

COUNTY RD 357

Good

Over: HILBERT BR

S 22 T 62 N R 9 W, Lewis, MO

Built 2004 Load: 40.5 t ADT: 35

RT C E

Good

Over: DURGNS CR

S 28 T 61 N R 6 W, Lewis, MO

Built 2021 Load: 40.5 t ADT: 586

MO 156 E

Good

Over: SEEBER BR

S 17 T 60 N R 9 W, Lewis, MO

Built 2017 Load: 41.4 t ADT: 609

COUNTY RD 536

Good

Over: DURGENS CR

S 19 T 61 N R 6 W, Lewis, MO

Built 1990 Load: 44.1 t ADT: 35

MO 156 E

Good

Over: SPEES BR

S 17 T 60 N R 9 W, Lewis, MO

Built 2017 Load: 44.1 t ADT: 609

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.