Total bridges
419
Public highway bridges in Kay County
County profile · official public datasets
Kay County, OK
419 public highway bridges tracked in the FHWA National Bridge Inventory: 30.3% rated Good, 63.7% Fair, 6% Poor.
- 419
- Public bridges
- 30.3%
- Good condition
- 6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Kay County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 43%
- lowest Poor share in state
- 6%
- Poor-condition share
- 419
- public highway bridges
- 1979
- 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.
Kay County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Kay County ranks #33 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6%). Kay County, Oklahoma contains 419 public highway bridges. Roughly 30.3% are rated “Good,” 63.7% “Fair,” and 6% “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.
Good condition
30.3%
127 of 419 rated 7-9
Fair condition
63.7%
267 of 419 rated 5-6
Poor condition
6%
25 of 419 rated 4 or below
In-state Poor-share rank
#33 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 419 NBI-tracked bridges by lowest applicable component rating.
Good 30.3% (127)
Fair 63.7% (267)
Poor 6% (25)
Kay County's Poor-condition bridges carry 14,592 vehicle crossings a day
That is 2.5% of the county's reported daily bridge traffic on 6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 584 crossings a day against 1,706 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 419 of 419 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
48.7% of Kay County's bridges have passed the 50-year mark
204 of the 419 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 30.3% 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 23.3% of the county's Poor-condition bridge traffic
U.S. 60 over CHIKASKIA RIVER, built 1973, carries 3,400 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 25-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 14,592 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Kay County's bridges were built
419 bridges with a recorded construction year, grouped by decade
- 1910s 6
1910–1919
6 bridges
- 1920s 12
1920–1929
12 bridges
- 1930s 28
1930–1939
28 bridges
- 1940s 23
1940–1949
23 bridges
- 1950s
1950–1959
57 bridges
- 1960s
1960–1969
51 bridges
- 1970s
1970–1979
35 bridges
- 1980s 27
1980–1989
27 bridges
- 1990s 27
1990–1999
27 bridges
- 2000s
2000–2009
44 bridges
- 2010s
2010–2019
82 bridges
- 2020s 27
2020–2029
27 bridges
What this shows Construction peaked in the 2010s, when 82 of the county's bridges still in the inventory were built, which is 19.6% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year (1979) matches the Oklahoma average (1977).
How Kay County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Kay County in number of bridges, with their condition splits. Its 6% Poor share is the 1st-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1975 is in line with the group.
Showing the 5 closest of 76 Oklahoma counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Caddo County | 424 | 24.1% | 63.4% | 12.5% | 1979 |
| Kay County (this page) | 419 | 30.3% | 63.7% | 6% | 1979 |
| Pittsburg County | 411 | 47.2% | 45% | 7.8% | 1971 |
| Pottawatomie County | 408 | 21.6% | 72.1% | 6.4% | 1982 |
| Muskogee County | 398 | 37.7% | 52.3% | 10.1% | 1971 |
| Creek County | 395 | 40.5% | 38.7% | 20.8% | 1972 |
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 Kay 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 Kay County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (419 bridges here).
- Taylor County, TX · 419 bridges
- Lewis County, WA · 419 bridges
- Santa Barbara County, CA · 418 bridges
- Lucas County, OH · 418 bridges
Similar average build year
Nearest mean year-built outside OK (1979 here).
- Pima County, AZ · avg 1979 · 1,150 bridges
- Jefferson County, KY · avg 1979 · 662 bridges
- Spartanburg County, SC · avg 1979 · 638 bridges
- McPherson County, KS · avg 1979 · 586 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (419)
E0180
PoorOver: CHIKASKIA RIVER
4N 6.2E OF US60/I-35, Kay, OK
Built 1962 Load: 0.0 t ADT: 1,500
N3130
PoorOver: DEER CREEK
4.5W 3.7N OF I-35/US60, Kay, OK
Built 1987 Load: 0.0 t ADT: 100
E0180
PoorOver: CHIKASKIA RIVER OFLOW
2.8E OF S.H. 177, Kay, OK
Built 2017 Load: 0.0 t ADT: 2,886
E0120
PoorOver: LOST CREEK
2N 2.7E OF SH11/US177, Kay, OK
Built 1910 Load: 2.7 t ADT: 100
E0010
PoorOver: CREEK
.8N 3W OF CHILOCCO, Kay, OK
Built 1912 Load: 11.8 t ADT: 45
E0270
PoorOver: CREEK
4.5S .9W OF US 60/H156, Kay, OK
Built 1919 Load: 11.8 t ADT: 118
E0230
PoorOver: CREEK
.5S 1E OF US60/SH156, Kay, OK
Built 1951 Load: 11.8 t ADT: 1,900
N3420
PoorOver: SWEETWATER CREEK
8.2E .4S OF NEWKIRK, Kay, OK
Built 1940 Load: 15.4 t ADT: 100
E0010
PoorOver: CREEK
.8N 1.9W OF CHILOCCO, Kay, OK
Built 1912 Load: 19.1 t ADT: 45
N3480
PoorOver: MYERS CREEK
.5E .4S OF HARDY, Kay, OK
Built 1920 Load: 19.1 t ADT: 38
E0110
PoorOver: RABBIT CREEK
2S 15.8E OF NEWKIRK, Kay, OK
Built 1965 Load: 19.1 t ADT: 90
U.S. 60
PoorOver: CHIKASKIA RIVER
1.7 MI E US 177, Kay, OK
Built 1973 Load: 23.6 t ADT: 3,400
E0150
PoorOver: CREEK
.3E 1S .1E OF I-35/SH11, Kay, OK
Built 1950 Load: 25.4 t ADT: 250
U.S. 60
PoorOver: CHIKASKIA RIVER
1.7 MI E US 177, Kay, OK
Built 1973 Load: 30.8 t ADT: 3,400
E0250
PoorOver: CREEK
3S 2.5W OF US60/I35, Kay, OK
Built 1925 Load: 33.6 t ADT: 72
N3350
PoorOver: CHILOCCO CREEK
1.2E 6.2N OF NEWKIRK, Kay, OK
Built 1940 Load: 34.5 t ADT: 25
N3220
PoorOver: SCATTER CREEK
1.7E .9S OF SUMPTER, Kay, OK
Built 1950 Load: 37.2 t ADT: 75
N3130
PoorOver: DOE CREEK
4.7W 5N OF I-35/SH11, Kay, OK
Built 1950 Load: 43.5 t ADT: 50
N3400
PoorOver: CREEK
6.2E 2.6N OF NEWKIRK, Kay, OK
Built 1965 Load: 81.6 t ADT: 150
Read our methodology - how this data is sourced, computed, and verified.
Related
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.