County profile · official public datasets

Garfield County, OK

504 public highway bridges tracked in the FHWA National Bridge Inventory: 27% rated Good, 61.3% Fair, 11.7% Poor.

504
Public bridges: 27%
Good condition: 11.7%
Poor condition

The verdict

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

Garfield County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

63rd
of 77 on Poor share: 11.7%
Poor-condition share: 504
public highway bridges: 1970
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.

Garfield County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Garfield County ranks #63 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.7%). Garfield County, Oklahoma contains 504 public highway bridges. Roughly 27% are rated “Good,” 61.3% “Fair,” and 11.7% “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

504

Public highway bridges in Garfield County

Good condition

27%

136 of 504 rated 7-9

Fair condition

61.3%

309 of 504 rated 5-6

Poor condition

11.7%

59 of 504 rated 4 or below

In-state Poor-share rank

#63 of 77

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

Condition distribution

Share of 504 NBI-tracked bridges by lowest applicable component rating.

Good

27% (136)

Fair

61.3% (309)

Poor

11.7% (59)

Garfield County's Poor-condition bridges carry 11,025 vehicle crossings a day

That is 2.3% of the county's reported daily bridge traffic on 11.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 187 crossings a day against 1,649 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 504 of 504 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

56% of Garfield County's bridges have passed the 50-year mark

282 of the 504 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 27% 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 43.5% of the county's Poor-condition bridge traffic

E0420 (CHESTNUT ST over CREEK, built 1984, carries 4,800 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 59-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 11,025 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

2
1910s

10
1920s

37
1930s

43
1940s

49
1950s

54
1960s

67
1970s

48
1980s

56
1990s

29
2000s

52
2010s

47
2020s

10

What this shows Construction peaked in the 1960s, when 67 of the county's bridges still in the inventory were built, which is 13.3% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1970, 7 years older than the Oklahoma average of 1977.

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

The 5 Oklahoma counties nearest Garfield County in number of bridges, with their condition splits. Its 11.7% Poor share is the 5th-lowest of these 6. Its average build year of 1970 against a peer-group mean of 1978 is 8 years older.

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

Bridge inventory size and condition shares for Garfield County and the 5 Oklahoma counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Garfield County (this page)	504	27%	61.3%	11.7%	1970
Canadian County	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 Garfield 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 Garfield County, both outside Oklahoma so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OK (504 bridges here).

Essex County, NJ · 505 bridges
Monmouth County, NJ · 505 bridges
Linn County, IA · 506 bridges
Saunders County, NE · 506 bridges

Similar average build year

Nearest mean year-built outside OK (1970 here).

Hamilton County, OH · avg 1970 · 783 bridges
Yavapai County, AZ · avg 1970 · 543 bridges
San Luis Obispo County, CA · avg 1970 · 401 bridges
Somerset County, NJ · avg 1970 · 397 bridges

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

All 504 Good 136 Fair 309 Poor 59

Good-condition bridges (136)

Sort:

Garfield County Bridge Snapshot

Condition distribution

Garfield County's Poor-condition bridges carry 11,025 vehicle crossings a day

56% of Garfield County's bridges have passed the 50-year mark

One structure carries 43.5% of the county's Poor-condition bridge traffic

How Garfield 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 (136)

N2840

2404C

E0560

N2780

N2810

N2910

E0360

N2990

N2970

N2970

2404C

E0330

E0320

E0510

N2760

E0420

E0510

N2960

E0510

E0520

E0400

N2890

N3000

E0450

N2760

2404CO

N2970

E0390

E0460

N3020

E0470

E0470

E0370

E0407 (PRINCETON)

N2874 (MADISON)

WEST RANDOLPH

SOUTHGATE (E0450)

N2880

N2880

E0430

E0425

S.H. 15 & S.H. 74

S.H. 15 & S.H. 74

E0450

N2930 (66 ST)

E0420 (CHESTNUT ST

N2837 (GREENLEAF

S.H. 74

U.S. 60 / U.S. 64

U.S. 60 / U.S. 412

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