County profile · official public datasets

Canadian County, OK

493 public highway bridges tracked in the FHWA National Bridge Inventory: 49.5% rated Good, 47.1% Fair, 3.4% Poor.

493
Public bridges: 49.5%
Good condition: 3.4%
Poor condition

The verdict

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

Canadian County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 26%
lowest Poor share in state: 3.4%
Poor-condition share: 493
public highway bridges: 1986
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.

Canadian County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Canadian County ranks #20 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.4%). Canadian County, Oklahoma contains 493 public highway bridges. Roughly 49.5% are rated “Good,” 47.1% “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

493

Public highway bridges in Canadian County

Good condition

49.5%

244 of 493 rated 7-9

Fair condition

47.1%

232 of 493 rated 5-6

Poor condition

3.4%

17 of 493 rated 4 or below

In-state Poor-share rank

#20 of 77

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

Condition distribution

Share of 493 NBI-tracked bridges by lowest applicable component rating.

Good

49.5% (244)

Fair

47.1% (232)

Poor

3.4% (17)

Canadian County's Poor-condition bridges carry 4,070 vehicle crossings a day

That is 0.2% 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 239 crossings a day against 6,422 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 493 of 493 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

31% of Canadian County's bridges have passed the 50-year mark

153 of the 493 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 49.5% 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 23.8% of the county's Poor-condition bridge traffic

0922C over CREEK, built 1928, carries 970 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 17-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 4,070 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

2
1920s

22
1930s

15
1940s

15
1950s

16
1960s

64
1970s

25
1980s

62
1990s

78
2000s

105
2010s

75
2020s

14

What this shows Construction peaked in the 2000s, when 105 of the county's bridges still in the inventory were built, which is 21.3% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 1986, 9 years newer than the Oklahoma average of 1977.

How Canadian County compares with Oklahoma's closest counties by inventory size

The 5 Oklahoma counties nearest Canadian 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 1986 against a peer-group mean of 1974 is 12 years newer.

Showing the 5 closest of 76 Oklahoma counties eligible for comparison.

Bridge inventory size and condition shares for Canadian County and the 5 Oklahoma counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Garfield County	504	27%	61.3%	11.7%	1970
Canadian County (this page)	493	49.5%	47.1%	3.4%	1986
Kiowa County	477	65.4%	31.7%	2.9%	1973
Grant County	476	28.2%	64.5%	7.4%	1988
Le Flore County	469	44.3%	44.3%	11.3%	1967
Lincoln County	450	37.1%	49.6%	13.3%	1974

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

Similar inventory size

Nearest county inventories outside OK (493 bridges here).

Greene County, MO · 493 bridges
Vermilion County, IL · 494 bridges
Shasta County, CA · 492 bridges
Lyon County, KS · 492 bridges

Similar average build year

Nearest mean year-built outside OK (1986 here).

El Paso County, TX · avg 1986 · 783 bridges
Caddo County, LA · avg 1986 · 682 bridges
Weld County, CO · avg 1986 · 614 bridges
Polk County, IA · avg 1986 · 545 bridges

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

All 493 Good 244 Fair 232 Poor 17

Good-condition bridges (244)

Sort:

Canadian County Bridge Snapshot

Condition distribution

Canadian County's Poor-condition bridges carry 4,070 vehicle crossings a day

31% of Canadian County's bridges have passed the 50-year mark

One structure carries 23.8% of the county's Poor-condition bridge traffic

How Canadian County compares with Oklahoma's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (244)

KILPATRICK TP

NW 23RD

KILPATRICK TP

NW 50TH

KILPATRICK TP

N2740

S.H. 4 (MUSTANG RD

S.H. 4 (MUSTANG RD

KILPATRICK TP

S.H. 4

KILPATRICK TP WB

KILPATRICK TP EB

KILPATRICK TP WB

KILPATRICK TP EB

KILPATRICK RAMP WB

KILPATRICK RAMP WB

KILPATRICK RAMP EB

NB KILPATRICK TP

KILPATRICK TP SB

SW 15TH ST

KILPATRICK TP

KILPATRICK TP SB

KILPATRICK TP NB

KILPATRICK TP SB

KILPATRICK TP NB

KILPATRICK TP RAMP

KILPATRICK TP WB

KILPATRICK TP EB

KILPATRICK TP RAMP

KILPATRICK TP WB

KILPATRICK TP EB

KILPATRICK TP

KILPATRICK TP

N. RICHLAND

E0960 (NW 150TH)

KILPATRICK TP NB

IRR E0960

I-40

I-40 FRTG. RD. WB

I-40 FRTG. RD. EB

KILPATRICK TP SB

KILPATRICK TP NB

S.H. 3 WB

I-40 WB

I-40

MUSTANG RD.

N2670

E1040

U.S. 81 SB

E0960 (N. 150TH)

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