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)
E0150
FairOver: CREEK
.7W 1S .3E OF I-35/SH11, Kay, OK
Built 1960 Load: 19.1 t ADT: 100
E0210 (LAKE RD)
FairOver: TURKEY CREEK
7S 1E OF KILDARE, Kay, OK
Built 1963 Load: 19.1 t ADT: 2,500
E0180
FairOver: CREEK
4N 1.9E OF US60/I-35, Kay, OK
Built 1964 Load: 19.1 t ADT: 561
N3430
FairOver: CREEK
9.2E 4S OF NEWKIRK, Kay, OK
Built 1965 Load: 19.1 t ADT: 100
E0180
FairOver: STINK CREEK
.3E 4S .7E OF I-35/SH11, Kay, OK
Built 1965 Load: 19.1 t ADT: 461
N3430
FairOver: BEAR CREEK
9.2E 2.6S OF NEWKIRK, Kay, OK
Built 1965 Load: 19.1 t ADT: 100
N3230
FairOver: CREEK
2E 1.2N OF THREE SANDS, Kay, OK
Built 1970 Load: 19.1 t ADT: 25
N3380
FairOver: WOLF CREEK
4.2E 1.1S OF NEWKIRK, Kay, OK
Built 1970 Load: 19.1 t ADT: 150
N3390
FairOver: CREEK
5E .7S OF KILDARE, Kay, OK
Built 1974 Load: 19.1 t ADT: 460
N3150
FairOver: THOMPSON CREEK
2.5W .5N OF I-35/SH11, Kay, OK
Built 1978 Load: 19.1 t ADT: 75
E0090
FairOver: DUCK CREEK
.2E .2S 1E OF PECKHAM, Kay, OK
Built 1984 Load: 19.1 t ADT: 237
E0160
FairOver: DUCK CREEK
5E 2S .9E OF US177/SH11, Kay, OK
Built 1989 Load: 19.1 t ADT: 100
E0100
FairOver: CREEK
2.3E 1S .5E OF NEWKIRK, Kay, OK
Built 1960 Load: 19.1 t ADT: 25
E0210
FairOver: COWSKIN CREEK
6.5S 6.6E OF BLACKWELL, Kay, OK
Built 1920 Load: 19.1 t ADT: 100
N3196
FairOver: CREEK
1/2 BLK N. PARK ST.ON 7TH, Kay, OK
Built 1930 Load: 19.1 t ADT: 175
N3320
FairOver: CREEK
2W.3S OF KILDARE, Kay, OK
Built 2004 Load: 19.1 t ADT: 25
IRR E0150
FairOver: CREEK
1S 5.3E OF KILDARE, Kay, OK
Built 2014 Load: 19.1 t ADT: 100
U.S. 177
FairOver: CREEK
8.1 MI N JCT US 60, Kay, OK
Built 1941 Load: 19.6 t ADT: 5,300
E0030
FairOver: SPRING CREEK
1W 5.8 N OF PECKHAM, Kay, OK
Built 1950 Load: 20.0 t ADT: 37
E0230
FairOver: CREEK
1S 6.2E OF I-35/US60, Kay, OK
Built 1950 Load: 20.0 t ADT: 1,250
U.S. 60
FairOver: DUCK CREEK
3.3 MI E US 177, Kay, OK
Built 1973 Load: 20.9 t ADT: 3,400
U.S. 60
FairOver: DUCK CREEK
3.3 MI E US 177, Kay, OK
Built 1973 Load: 20.9 t ADT: 3,400
E0280
FairOver: CREEK
1.N 2.1W OF THREE SANDS, Kay, OK
Built 1999 Load: 20.9 t ADT: 50
CO. RD. 3604C
FairOver: I-35 UNDER
OKLA-KAN S/L, Kay, OK
Built 1958 Load: 21.0 t ADT: 50
CO. RD. E0280
FairOver: I-35 UNDER
1 MI N NOBLE C/L, Kay, OK
Built 1959 Load: 21.8 t ADT: 50
CO. RD. E0270
FairOver: I-35 UNDER
2 MI N NOBLE C/L, Kay, OK
Built 1959 Load: 21.8 t ADT: 50
CO. RD. E0260
FairOver: I-35 UNDER
3.0 MI N NOBLE C/L, Kay, OK
Built 1959 Load: 21.8 t ADT: 50
CO. RD. E0230
FairOver: I-35 UNDER
1 MI S US60 JCT, Kay, OK
Built 1959 Load: 21.8 t ADT: 101
CO. RD. E0210
FairOver: I-35 UNDER
1 MI N JCT US 60, Kay, OK
Built 1959 Load: 21.8 t ADT: 101
CO. RD. E0200
FairOver: I-35 UNDER
9. MI N NOBLE C/L, Kay, OK
Built 1959 Load: 21.8 t ADT: 50
CO. RD. E0070
FairOver: I-35 UNDER
7 MI N JCT SH 11, Kay, OK
Built 1959 Load: 21.8 t ADT: 75
CO. RD. E0160
FairOver: I-35 UNDER
13 MI N NOBLE C/L, Kay, OK
Built 1960 Load: 21.8 t ADT: 50
N3314 (ASH ST.)
FairOver: CREEK
.3N OF HIGHLAND, Kay, OK
Built 1920 Load: 22.5 t ADT: 2,000
BIRCH ST.
FairOver: CREEK
.4 MI N OF HIGHLAND, Kay, OK
Built 1950 Load: 22.5 t ADT: 200
MONUMENT RD
FairOver: CREEK
150E OF 14TH AND LAKE RD, Kay, OK
Built 1938 Load: 22.5 t ADT: 3,000
E0195 BRADLEY
FairOver: CREEK
.2E OF US77 ON BRADLEY, Kay, OK
Built 1970 Load: 22.5 t ADT: 250
E0090
FairOver: DOE CREEK
5N 3.2W OF SH11/ I-35, Kay, OK
Built 1950 Load: 22.7 t ADT: 24
CO. RD. E0130
FairOver: I-35 UNDER
1 MI N JCT SH 11, Kay, OK
Built 1960 Load: 22.7 t ADT: 50
U.S. 60
FairOver: U.S. 77 UNDER
2 MI E JCT I 35, Kay, OK
Built 1969 Load: 22.7 t ADT: 2,250
U.S. 60
FairOver: U.S. 77 UNDER
2 MI E JCT I 35, Kay, OK
Built 1969 Load: 22.7 t ADT: 2,200
E0010
FairOver: CREEK
KS/OK Border, Kay, OK
Built 2003 Load: 22.7 t ADT: 24
U.S. 60
FairOver: U.S. 60 BUS. UNDER
12.2 MI E JCT I 35, Kay, OK
Built 1969 Load: 23.4 t ADT: 1,200
E0010
FairOver: CHILOCCO CREEK
.8N 1.1W OF CHILOCCO, Kay, OK
Built 1920 Load: 23.6 t ADT: 45
CO. RD. E0120
FairOver: I-35 UNDER
2 MI N JCT SH 11, Kay, OK
Built 1959 Load: 23.6 t ADT: 50
CO. RD. E0100
FairOver: I-35 UNDER
4 MI N JCT SH 11, Kay, OK
Built 1959 Load: 23.6 t ADT: 50
CO. RD. E0090
FairOver: I-35 UNDER
5 MI N JCT SH 11, Kay, OK
Built 1959 Load: 23.6 t ADT: 50
I-35
FairOver: SALT FORK ARKANSAS RIVER
5.6 MI N NOBLE C/L, Kay, OK
Built 1959 Load: 23.6 t ADT: 8,750
I-35
FairOver: SALT FORK ARKANSAS RIVER
5.6 MI N NOBLE C/L, Kay, OK
Built 1959 Load: 23.6 t ADT: 8,750
N3210
FairOver: BITTER CREEK
3.3W 2.3N OF I-35/SH11, Kay, OK
Built 1965 Load: 23.6 t ADT: 50
S.H. 11
FairOver: CHIKASKIA RIVER
0.3 MI E JCT US 177, Kay, OK
Built 1970 Load: 23.6 t ADT: 3,600
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.