County profile · official public datasets

Cass County, MO

377 public highway bridges tracked in the FHWA National Bridge Inventory: 36.3% rated Good, 54.9% Fair, 8.8% Poor.

377
Public bridges
36.3%
Good condition
8.8%
Poor condition

The verdict

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

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

59th
of 115 on Poor share
8.8%
Poor-condition share
377
public highway bridges
1983
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.

Cass County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Cass County ranks #59 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.8%). Cass County, Missouri contains 377 public highway bridges. Roughly 36.3% are rated “Good,” 54.9% “Fair,” and 8.8% “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

377

Public highway bridges in Cass County

Good condition

36.3%

137 of 377 rated 7-9

Fair condition

54.9%

207 of 377 rated 5-6

Poor condition

8.8%

33 of 377 rated 4 or below

In-state Poor-share rank

#59 of 115

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

Condition distribution

Share of 377 NBI-tracked bridges by lowest applicable component rating.

Good
36.3% (137)
Fair
54.9% (207)
Poor
8.8% (33)

Cass County's Poor-condition bridges carry 24,433 vehicle crossings a day

That is 2.7% of the county's reported daily bridge traffic on 8.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 740 crossings a day against 2,054 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 377 of 377 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

39% of Cass County's bridges have passed the 50-year mark

147 of the 377 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 36.3% 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 42.2% of the county's Poor-condition bridge traffic

MO 7 S over IS 49, built 1965, carries 10,317 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 33-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 24,433 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Cass County's bridges were built

377 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 2000s, when 83 of the county's bridges still in the inventory were built, which is 22% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year (1983) matches the Missouri average (1979).

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

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

The 5 Missouri counties nearest Cass County in number of bridges, with their condition splits. Its 8.8% Poor share is the 4th-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1983 is in line with the group.

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

Bridge inventory size and condition shares for Cass County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
Jefferson County 411 3.4%
Vernon County 401 4.2%
Nodaway County 396 14.4%
Cass County (this page) 377 8.8%
Cape Girardeau County 374 5.1%
Carroll County 371 18.1%

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

Similar inventory size

Nearest county inventories outside MO (377 bridges here).

Similar average build year

Nearest mean year-built outside MO (1983 here).

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

All 377 Good 137 Fair 207 Poor 33

Poor-condition bridges (33)

CLEVELAND RD

Poor

Over: WEST FK

S 26 T 46 N R 33 W, Cass, MO

Built 1950 Load: 6.3 t ADT: 450

175 ST

Poor

Over: BR OF CRAWFORD CR

S 14 T 46 N R 30 W, Cass, MO

Built 1940 Load: 6.3 t ADT: 30

PROSPECT AVE

Poor

Over: BR OF MASSEY CR

S 27 T 45 N R 33 W, Cass, MO

Built 1910 Load: 6.3 t ADT: 50

MAIN ST

Poor

Over: PONEY CR

S 8 T 44 N R 33 W, Cass, MO

Built 1935 Load: 7.2 t ADT: 29

GROH RD

Poor

Over: MASSEY CR

S 35 T 45 N R 33 W, Cass, MO

Built 1992 Load: 8.1 t ADT: 120

MAIN CITY RD

Poor

Over: OWENS CR

S 19 T 43 N R 32 W, Cass, MO

Built 1940 Load: 9.0 t ADT: 45

W 261 ST

Poor

Over: BR OF S GRAND RVR

S 4 T 44 N R 32 W, Cass, MO

Built 1940 Load: 11.7 t ADT: 110

331 ST

Poor

Over: SUGAR CR

S 16 T 43 N R 30 W, Cass, MO

Built 1920 Load: 11.7 t ADT: 45

233 ST

Poor

Over: MASSEY CR

S 17 T 45 N R 33 W, Cass, MO

Built 2000 Load: 11.7 t ADT: 100

268 ST

Poor

Over: EAST BR

S 7 T 44 N R 31 W, Cass, MO

Built 1900 Load: 12.6 t ADT: 100

179 ST

Poor

Over: BR OF EAST CR

S 16 T 46 N R 29 W, Cass, MO

Built 1935 Load: 13.5 t ADT: 50

205 ST

Poor

Over: BR OF MUDDY CR

S 1 T 45 N R 31 W, Cass, MO

Built 1930 Load: 13.5 t ADT: 110

PROSPECT AVE

Poor

Over: BR OF MASSEY CR

S 21 T 45 N R 33 W, Cass, MO

Built 1940 Load: 14.4 t ADT: 50

MORGAN RD

Poor

Over: S GRAND RVR

S 27 T 44 N R 32 W, Cass, MO

Built 1960 Load: 14.4 t ADT: 45

275 ST

Poor

Over: BR OF CLEAR CR

S 10 T 44 N R 30 W, Cass, MO

Built 1965 Load: 14.4 t ADT: 100

WILMOTH RD

Poor

Over: CRAWFORD CR

S 23 T 46 N R 30 W, Cass, MO

Built 1950 Load: 16.2 t ADT: 110

CAMP BRANCH RD

Poor

Over: BR OF CROOKED CR

S 31 T 45 N R 30 W, Cass, MO

Built 1955 Load: 16.2 t ADT: 45

DORSETT HIL RD

Poor

Over: BR NEW CHNL GRAND

S 13 T 43 N R 32 W, Cass, MO

Built 1965 Load: 16.2 t ADT: 45

STALEY MOUND RD

Poor

Over: BR OF BIG CR

S 11 T 45 N R 30 W, Cass, MO

Built 1930 Load: 17.1 t ADT: 120

PONY CREEK RD

Poor

Over: BR OF S CR

S 23 T 44 N R 33 W, Cass, MO

Built 1970 Load: 17.1 t ADT: 120

195 ST

Poor

Over: BR OF W CR

S 29 T 46 N R 32 W, Cass, MO

Built 1940 Load: 21.6 t ADT: 205

RT A E

Poor

Over: IS 49

S 24 T 43 N R 31 W, Cass, MO

Built 1972 Load: 24.3 t ADT: 3,062

RT C S

Poor

Over: IS 49

S 15 T 45 N R 32 W, Cass, MO

Built 1968 Load: 25.2 t ADT: 1,156

RT Y S

Poor

Over: CHANDLER CR

S 13 T 45 N R 33 W, Cass, MO

Built 1956 Load: 25.2 t ADT: 838

MO 7 S

Poor

Over: IS 49

S 16 T 44 N R 31 W, Cass, MO

Built 1965 Load: 27.9 t ADT: 10,317

RT B E

Poor

Over: EIGHTMILE CR

S 35 T 43 N R 31 W, Cass, MO

Built 1965 Load: 28.8 t ADT: 1,083

RT D S

Poor

Over: COLDWATER CR

S 8 T 43 N R 33 W, Cass, MO

Built 1972 Load: 30.6 t ADT: 1,298

MO 2 E

Poor

Over: PONEY CR

S 8 T 44 N R 33 W, Cass, MO

Built 1972 Load: 31.5 t ADT: 3,976

S PRETTYMAN RD

Poor

Over: POLECAT CR

S 29 T 45 N R 31 W, Cass, MO

Built 2020 Load: 32.4 t ADT: 250

278 TH

Poor

Over: EAST BR

S 18 T 44 N R 31 W, Cass, MO

Built 1905 Load: 35.1 t ADT: 45

OR 49 S

Poor

Over: GRAND RVR

S 26 T 45 N R 32 W, Cass, MO

Built 1923 Load: 40.5 t ADT: 68

RAFFURTY RD

Poor

Over: CAMP CR

S 12 T 45 N R 31 W, Cass, MO

Built 1900 Load: 45.9 t ADT: 11

SHIMEL RD

Poor

Over: EAST CR

S 20 T 46 N R 29 W, Cass, MO

Built 1990 Load: 47.7 t ADT: 250

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.