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.
Fair-condition bridges (267)
E0040
FairOver: EAST BITTER CREEK
3S 5.9E OF KS SL / I-35, Kay, OK
Built 2011 Load: 31.8 t ADT: 25
N3380
FairOver: DEER CREEK
4E 2.7N OF NEWKIRK, Kay, OK
Built 2017 Load: 31.8 t ADT: 100
U.S. 60
FairOver: CREEK
14.3 MI E JCT I 35, Kay, OK
Built 1952 Load: 32.7 t ADT: 4,700
I-35
FairOver: DRY CREEK
8.7 MI N JCT SH 11, Kay, OK
Built 1959 Load: 32.7 t ADT: 14,300
I-35
FairOver: SALT FK ARK RVR OFLOW
5.4 MI N NOBLE C/L, Kay, OK
Built 1962 Load: 32.7 t ADT: 17,500
I-35
FairOver: SALT FK ARK RVR OFLOW
5.5 MI N NOBLE C/L, Kay, OK
Built 1962 Load: 32.7 t ADT: 17,500
U.S. 177
FairOver: U.S. 60 UNDER
3.6 MI E JCT I 35, Kay, OK
Built 1969 Load: 32.7 t ADT: 2,100
N3170
FairOver: DOE CREEK
.5 W 5.6 S OF I-35/US177, Kay, OK
Built 1982 Load: 32.7 t ADT: 50
S.H. 11
FairOver: SPRING CREEK
1.1 MI W JCT US 77, Kay, OK
Built 1982 Load: 32.7 t ADT: 2,500
S.H. 11
FairOver: CREEK
8.4 MI E US 177, Kay, OK
Built 1983 Load: 32.7 t ADT: 2,500
E0240
FairOver: CREEK
5W 2S OF I-35 /US 60, Kay, OK
Built 2000 Load: 32.7 t ADT: 50
U.S. 77
FairOver: CREEK
2 MI N JCT US 60, Kay, OK
Built 1958 Load: 33.5 t ADT: 10,300
E0220
FairOver: CREEK
16.E OF I-35/US60, Kay, OK
Built 2001 Load: 33.6 t ADT: 700
U.S. 77
FairOver: SALT FORK RIVER
6.9 MI N NOBLE C/L, Kay, OK
Built 1960 Load: 33.6 t ADT: 2,100
I-35
FairOver: CREEK
13.9 MI N NOBLE C/L, Kay, OK
Built 1960 Load: 33.8 t ADT: 15,500
E0070
FairOver: BOIS DARC CREEK
2N 2.5W OF NEWKIRK, Kay, OK
Built 1950 Load: 34.5 t ADT: 35
E0040
FairOver: BITTER CREEK
.7E 5N 1.6E OF SUMPTER, Kay, OK
Built 2010 Load: 34.5 t ADT: 100
E0150
FairOver: DUCK CREEK
.3E 6.2S OF PECKHAM, Kay, OK
Built 1996 Load: 35.4 t ADT: 50
E0150
FairOver: BOIS DARC CREEK
3.1W .9S OF KILDARE, Kay, OK
Built 1940 Load: 35.4 t ADT: 24
N3120 (3646C)
FairOver: SAND CREEK
.2N 6.1W 2.2N OF BRAMAN, Kay, OK
Built 2022 Load: 35.4 t ADT: 32
U.S. 60
FairOver: COWSKIN CREEK
10.3 MI E JCT I 35, Kay, OK
Built 1969 Load: 36.2 t ADT: 7,600
U.S. 177
FairOver: CHIKASKIA RIVER
9.3 MI N JCT US 60, Kay, OK
Built 1957 Load: 36.3 t ADT: 3,100
I-35
FairOver: DOE CREEK
3.2 MI N JCT SH 11, Kay, OK
Built 1959 Load: 36.3 t ADT: 7,600
I-35
FairOver: DOE CREEK
3.2 MI N JCT SH 11, Kay, OK
Built 1959 Load: 36.3 t ADT: 7,500
E0220
FairOver: BOIS DARC CREEK
.5N 1.1E OF US 60/SH156, Kay, OK
Built 1982 Load: 36.3 t ADT: 250
U.S. 60
FairOver: DEER CREEK
4.7 MI E GRANT C/L, Kay, OK
Built 1985 Load: 36.3 t ADT: 1,500
E0120
FairOver: CHIKASKIA RIVER
2N .7W SH11/US177, Kay, OK
Built 1996 Load: 36.3 t ADT: 100
IRR E0150
FairOver: THOMPSON CREEK
2W; 1S OF JCT I-35/SH11, Kay, OK
Built 2011 Load: 36.3 t ADT: 75
S.H. 11
FairOver: CHIKASKIA RIVER OFLOW
0.9 MI E JCT US 177, Kay, OK
Built 1970 Load: 37.2 t ADT: 3,600
S.H. 11
FairOver: CHIKASKIA RIVER OFLOW
1.1 MI E JCT US 177, Kay, OK
Built 1970 Load: 37.2 t ADT: 2,600
S.H. 11
FairOver: CHIKASKIA RIVER OFLOW
1.5 MI E JCT US 177, Kay, OK
Built 1970 Load: 37.2 t ADT: 2,600
S.H. 11
FairOver: ARKANSAS RIVER
14.1 MI E JCT US 77, Kay, OK
Built 1975 Load: 37.2 t ADT: 830
IRR E0270
FairOver: CREEK
1N 3.5W OF ARK R./SH156, Kay, OK
Built 2010 Load: 37.2 t ADT: 100
E0210
FairOver: STINK CREEK
4.9E 1N OF I-35/US60, Kay, OK
Built 1982 Load: 38.1 t ADT: 75
E0250
FairOver: CREEK
3S 1W OF I-35/US60, Kay, OK
Built 1987 Load: 38.1 t ADT: 150
E0200
FairOver: CHIKASKIA RIVER
2N 6E OF I - 35 / U.S. 60, Kay, OK
Built 2006 Load: 38.1 t ADT: 100
E0260
FairOver: CREEK
4S 5.9W OF US60/I-35, Kay, OK
Built 1987 Load: 39.0 t ADT: 72
I-35
FairOver: CHIKASKIA RIVER
6.7 MI N JCT SH-11, Kay, OK
Built 2003 Load: 39.0 t ADT: 7,600
I-35
FairOver: CHIKASKIA RIVER
6.7 MI N JCT SH-11, Kay, OK
Built 2003 Load: 39.0 t ADT: 7,500
E0250
FairOver: COWSKIN CREEK
2.5S 1.4W JCT US60/SH156, Kay, OK
Built 2009 Load: 39.0 t ADT: 100
E0060
FairOver: DEER CREEK
3.5E 4.1S OF CHILOCCO, Kay, OK
Built 2012 Load: 39.0 t ADT: 38
N3160
FairOver: DOE CREEK
1.7W 3.7N OF I-35/SH11, Kay, OK
Built 2012 Load: 39.0 t ADT: 25
E0060
FairOver: CREEK
.2N 3.5W OF BRAMAN, Kay, OK
Built 2015 Load: 39.0 t ADT: 172
N3324 (5TH ST.)
FairOver: CREEK
250 FT N OF BRADLEY AVE, Kay, OK
Built 1997 Load: 39.2 t ADT: 1,485
E0220
FairOver: COON CREEK
8S 3.4E OF KILDARE, Kay, OK
Built 1982 Load: 39.9 t ADT: 100
IRR E0230
FairOver: CREEK
.5E 1S .5E OF I35/US60, Kay, OK
Built 2014 Load: 39.9 t ADT: 75
E0080
FairOver: BITTER CREEK
1.1E 1N OF SUMPTER, Kay, OK
Built 2012 Load: 39.9 t ADT: 24
N3230
FairOver: CREEK
4S 2E .7S of BLACKWELL, Kay, OK
Built 2018 Load: 39.9 t ADT: 100
N3200
FairOver: CREEK
1W 3.5N US177/SH11, Kay, OK
Built 1995 Load: 40.8 t ADT: 50
N3320
FairOver: SPRING CREEK
2W 0.4N OF KILDARE, Kay, OK
Built 1997 Load: 40.8 t ADT: 50
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.