County profile · official public datasets

Clinton County, MO

152 public highway bridges tracked in the FHWA National Bridge Inventory: 34.9% rated Good, 55.3% Fair, 9.9% Poor.

152
Public bridges: 34.9%
Good condition: 9.9%
Poor condition

The verdict

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

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

65th
of 115 on Poor share: 9.9%
Poor-condition share: 152
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.

Clinton County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Clinton County ranks #65 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.9%). Clinton County, Missouri contains 152 public highway bridges. Roughly 34.9% are rated “Good,” 55.3% “Fair,” and 9.9% “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

152

Public highway bridges in Clinton County

Good condition

34.9%

53 of 152 rated 7-9

Fair condition

55.3%

84 of 152 rated 5-6

Poor condition

9.9%

15 of 152 rated 4 or below

In-state Poor-share rank

#65 of 115

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

Condition distribution

Share of 152 NBI-tracked bridges by lowest applicable component rating.

Good

34.9% (53)

Fair

55.3% (84)

Poor

9.9% (15)

Clinton County's Poor-condition bridges carry 669 vehicle crossings a day

That is 0.4% of the county's reported daily bridge traffic on 9.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 45 crossings a day against 1,230 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 152 of 152 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

29.6% of Clinton County's bridges have passed the 50-year mark

45 of the 152 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 34.9% 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 28.3% of the county's Poor-condition bridge traffic

RT K S over SLOAN BR, built 1960, carries 189 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 15-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 669 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

2
1910s

1
1920s

2
1930s

11
1940s

1
1950s

4
1960s

21
1970s

7
1980s

25
1990s

43
2000s

19
2010s

12
2020s

4

What this shows Construction peaked in the 1990s, when 43 of the county's bridges still in the inventory were built, which is 28.3% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1983) matches the Missouri average (1979).

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

The 5 Missouri counties nearest Clinton County in number of bridges, with their condition splits. Its 9.9% Poor share is the 3rd-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1976 is 7 years newer.

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

Bridge inventory size and condition shares for Clinton County and the 5 Missouri counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Washington County	157	33.8%	56.1%	10.2%	1966
Phelps County	156	28.2%	63.5%	8.3%	1968
Clinton County (this page)	152	34.9%	55.3%	9.9%	1983
Taney County	151	31.1%	58.9%	9.9%	1985
Warren County	151	31.8%	64.2%	4%	1986
McDonald County	145	25.5%	63.4%	11%	1976

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

Similar inventory size

Nearest county inventories outside MO (152 bridges here).

Logan County, AR · 152 bridges
Kosciusko County, IN · 152 bridges
Muhlenberg County, KY · 152 bridges
Mineral County, MT · 152 bridges

Similar average build year

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

Dallas County, TX · avg 1983 · 3,230 bridges
Bexar County, TX · avg 1983 · 2,342 bridges
Sedgwick County, KS · avg 1983 · 1,333 bridges
Will County, IL · avg 1983 · 649 bridges

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

All 152 Good 53 Fair 84 Poor 15

All bridges (152)

Sort:

Clinton County Bridge Snapshot

Condition distribution

Clinton County's Poor-condition bridges carry 669 vehicle crossings a day

29.6% of Clinton County's bridges have passed the 50-year mark

One structure carries 28.3% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (152)

RT C S

NE 292ND ST

SW 240TH ST

IS 35 S

IS 35 S

IS 35 S

NW BRETHERN CH RD

RT T E

MO 121 S

SE TRI COUNTY RD

NW COUNTY LINE RD

NW 336TH ST

NW THOMPSON RD

SW 200TH ST

NE 270TH RD

NW OLD CEMETERY RD

US 169 S

SE 216TH RD

NW 336TH ST

MO 33 S

RT H E

RT NN E

US 69 S

SE 228TH ST

NW MUD RD

RT NN E

RT H E

NW POAGE RD

NW 316TH ST

RT PP E

NE HUGHES RD

NE 310TH ST

SE 228TH ST

MO 116 E

US 69 S

SW SPRINGTOWN RD

NE 305TH ST

NE 288TH ST

SW 200TH ST

NE 272ND ST

NW 284TH ST

NW 348TH RD

NE 288TH ST

NE JONES RD

NE 352ND ST

NE 303RD ST

NE 280TH ST

NW BETHANY CH RD

NE 312TH ST

RT K S

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