Total bridges
476
Public highway bridges in Grant County
County profile · official public datasets
Grant County, OK
476 public highway bridges tracked in the FHWA National Bridge Inventory: 28.2% rated Good, 64.5% Fair, 7.4% Poor.
- 476
- Public bridges
- 28.2%
- Good condition
- 7.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Grant County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- 47th
- of 77 on Poor share
- 7.4%
- Poor-condition share
- 476
- public highway bridges
- 1988
- 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.
Grant County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Grant County ranks #47 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.4%). Grant County, Oklahoma contains 476 public highway bridges. Roughly 28.2% are rated “Good,” 64.5% “Fair,” and 7.4% “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.
Good condition
28.2%
134 of 476 rated 7-9
Fair condition
64.5%
307 of 476 rated 5-6
Poor condition
7.4%
35 of 476 rated 4 or below
In-state Poor-share rank
#47 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 476 NBI-tracked bridges by lowest applicable component rating.
Good 28.2% (134)
Fair 64.5% (307)
Poor 7.4% (35)
Grant County's Poor-condition bridges carry 1,731 vehicle crossings a day
That is 1.6% of the county's reported daily bridge traffic on 7.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 49 crossings a day against 394 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 476 of 476 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
29% of Grant County's bridges have passed the 50-year mark
138 of the 476 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 28.2% 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 26% of the county's Poor-condition bridge traffic
N2920 over CREEK, built 1995, carries 450 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 35-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,731 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Grant County's bridges were built
476 bridges with a recorded construction year, grouped by decade
- 1920s 7
1920–1929
7 bridges
- 1930s 34
1930–1939
34 bridges
- 1940s 35
1940–1949
35 bridges
- 1950s 37
1950–1959
37 bridges
- 1960s 23
1960–1969
23 bridges
- 1970s 4
1970–1979
4 bridges
- 1980s 41
1980–1989
41 bridges
- 1990s
1990–1999
82 bridges
- 2000s
2000–2009
59 bridges
- 2010s
2010–2019
118 bridges
- 2020s 36
2020–2029
36 bridges
What this shows Construction peaked in the 2010s, when 118 of the county's bridges still in the inventory were built, which is 24.8% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year is 1988, 11 years newer than the Oklahoma average of 1977.
How Grant County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Grant County in number of bridges, with their condition splits. Its 7.4% Poor share is the 4th-lowest of these 6. Its average build year of 1988 against a peer-group mean of 1976 is 12 years newer.
Showing the 5 closest of 76 Oklahoma counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Canadian County | 493 | 49.5% | 47.1% | 3.4% | 1986 |
| Kiowa County | 477 | 65.4% | 31.7% | 2.9% | 1973 |
| Grant County (this page) | 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 |
| Grady County | 449 | 25.6% | 67.3% | 7.1% | 1980 |
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 Grant 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 Grant County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (476 bridges here).
- Johnson County, MO · 476 bridges
- Providence County, RI · 476 bridges
- Tangipahoa County, LA · 477 bridges
- Horry County, SC · 479 bridges
Similar average build year
Nearest mean year-built outside OK (1988 here).
- Travis County, TX · avg 1988 · 1,544 bridges
- Loudoun County, VA · avg 1988 · 442 bridges
- Licking County, OH · avg 1988 · 439 bridges
- Vernon County, MO · avg 1988 · 401 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (307)
E0040
FairOver: COOPER CREEK
2.7S 1.2W OF MANCHESTER, Grant, OK
Built 1983 Load: 19.1 t ADT: 25
N3080
FairOver: DEER CREEK
.1E 2.7N OF DEER CREEK, Grant, OK
Built 1983 Load: 19.1 t ADT: 24
N2920
FairOver: WILD HORSE CREEK
3.3S OF POND CREEK, Grant, OK
Built 1983 Load: 19.1 t ADT: 450
N2830
FairOver: COLDWATER CREEK
4.7E 1.4N OF NASH, Grant, OK
Built 1985 Load: 19.1 t ADT: 234
E0120
FairOver: SAND CREEK
2N 1.2E OF SH11/SH132, Grant, OK
Built 1985 Load: 19.1 t ADT: 50
E0020
FairOver: COOPER CREEK
.7S 1.2W OF MANCHESTER, Grant, OK
Built 1986 Load: 19.1 t ADT: 120
E0090
FairOver: OSAGE CREEK
5N 3.4W OF US81/SH11, Grant, OK
Built 1987 Load: 19.1 t ADT: 57
E0090
FairOver: POND CREEK
5N 6.4E OF SH11/US 81, Grant, OK
Built 1987 Load: 19.1 t ADT: 105
N3010
FairOver: DEAD MAN CREEK
.3N2.8W1N2W1.8NOF LAMONT, Grant, OK
Built 1989 Load: 19.1 t ADT: 51
N3040
FairOver: DEER CREEK
.2N 3.7E 1.1S OF RENFROW, Grant, OK
Built 1989 Load: 19.1 t ADT: 31
E0080
FairOver: CROOKED CREEK
6N 4.1E OF SH132/SH11, Grant, OK
Built 1989 Load: 19.1 t ADT: 50
N3010
FairOver: POLECAT CREEK
.3N2.8W1N2W.5SOF LAMONT, Grant, OK
Built 1990 Load: 19.1 t ADT: 24
N2830
FairOver: LYNCH CREEK
5E 9.1N OF NASH, Grant, OK
Built 1993 Load: 19.1 t ADT: 245
N3010
FairOver: CREEK
5E 3.4N OF MEDFORD, Grant, OK
Built 1941 Load: 19.1 t ADT: 25
N2880
FairOver: CREEK
.3S4W3.7N OF POND CREEK, Grant, OK
Built 1994 Load: 19.1 t ADT: 200
N2970
FairOver: CREEK
.3N 1.1E .9N OF MEDFORD, Grant, OK
Built 1996 Load: 19.1 t ADT: 50
N3060
FairOver: DEER CREEK
.2N 2.1E .5N OF SALT FORK, Grant, OK
Built 1950 Load: 19.1 t ADT: 24
E0270
FairOver: CREEK
3.4S 2.5E OF POND CREEK, Grant, OK
Built 1940 Load: 19.1 t ADT: 24
N2970
FairOver: CREEK
1.2S 5E .5S OF POND CREEK, Grant, OK
Built 1930 Load: 19.1 t ADT: 24
E0100
FairOver: CREEK
4N 4.9W OF SH11/SH74, Grant, OK
Built 2012 Load: 19.1 t ADT: 40
E0170
FairOver: COTTONWOOD CREEK
2.8S 2.7E OF MEDFORD, Grant, OK
Built 2012 Load: 19.1 t ADT: 25
E0130
FairOver: BULLWACKER CREEK
1N 1.1E OF SH11/US81, Grant, OK
Built 2012 Load: 19.1 t ADT: 24
S.H. 74
FairOver: CREEK
1.9 MI N GARFIELD CO, Grant, OK
Built 1940 Load: 19.6 t ADT: 600
E0010
FairOver: POND CREEK
.3N 9.4E OF MANCHESTER, Grant, OK
Built 1930 Load: 20.0 t ADT: 24
E0050
FairOver: SAND CREEK
3.7S 2.4E OF MANCHESTER, Grant, OK
Built 1975 Load: 20.0 t ADT: 50
E0040
FairOver: CREEK
2.7S 3.6W OF MANCHESTER, Grant, OK
Built 1992 Load: 20.9 t ADT: 24
E0230
FairOver: CREEK
2BLKSW OF US60/US81, Grant, OK
Built 1975 Load: 20.9 t ADT: 25
N2960
FairOver: CREEK
3.4S 4E OF POND CREEK, Grant, OK
Built 1940 Load: 21.8 t ADT: 75
E0020
FairOver: CREEK
.7S 3.8E OF MANCHESTER, Grant, OK
Built 1938 Load: 22.7 t ADT: 47
E0100
FairOver: ELM CREEK
4N 6.5E OF US81/SH11, Grant, OK
Built 1948 Load: 22.7 t ADT: 25
N2810
FairOver: CREEK
2.7E .6N OF NASH, Grant, OK
Built 1950 Load: 22.7 t ADT: 24
U.S. 81
FairOver: CREEK
2.9 MI S KANSAS ST.L., Grant, OK
Built 1927 Load: 23.0 t ADT: 750
U.S. 81
FairOver: CREEK
1.3 S KANSAS ST. LINE, Grant, OK
Built 1927 Load: 23.5 t ADT: 750
S.H. 74
FairOver: CREEK
1.4 MI N JCT US 60, Grant, OK
Built 1948 Load: 23.9 t ADT: 620
E0040
FairOver: CREEK
2.7S 4.4E OF MANCHESTER, Grant, OK
Built 2003 Load: 24.5 t ADT: 24
N3090
FairOver: CREEK
3E .3S OF SH11/74 JCT, Grant, OK
Built 2011 Load: 24.5 t ADT: 50
E0020
FairOver: CREEK
.8S 1.6E OF MANCHESTER, Grant, OK
Built 1938 Load: 25.4 t ADT: 47
E0220
FairOver: SPRING CREEK
.3N .8W OF LAMONT, Grant, OK
Built 2003 Load: 25.4 t ADT: 167
E0170
FairOver: CREEK
.8W 3S 1.4W OF SH11/US81, Grant, OK
Built 2014 Load: 25.4 t ADT: 24
E0070
FairOver: CREEK
4.4 W 2 N 6 W OF WAKITA, Grant, OK
Built 2023 Load: 25.4 t ADT: 24
E0180
FairOver: CREEK
4S 3.6E OF SH11/SH132, Grant, OK
Built 1936 Load: 26.3 t ADT: 41
E0050
FairOver: CREEK
3.7S 4.2E OF MANCHESTER, Grant, OK
Built 1940 Load: 26.3 t ADT: 24
N2950
FairOver: CREEK
.9W 6.5N OF MEDFORD, Grant, OK
Built 1987 Load: 26.3 t ADT: 24
E0080
FairOver: OSAGE CREEK
6N 3.5W OF US81/SH 11, Grant, OK
Built 1988 Load: 26.3 t ADT: 50
E0200
FairOver: COTTONWOOD CREEK
.2E .2N 6.9E OF JEFFERSON, Grant, OK
Built 1992 Load: 26.3 t ADT: 50
E0020
FairOver: CREEK
4.3W4.1N2.1W RENFROW, Grant, OK
Built 2006 Load: 26.3 t ADT: 50
E0150
FairOver: CREEK
1S.7W OF 11&83 JUNCTION, Grant, OK
Built 2006 Load: 26.3 t ADT: 200
N3090
FairOver: CREEK
1.1E 1.5N OF DEER CREEK, Grant, OK
Built 2011 Load: 26.3 t ADT: 24
U.S. 81
FairOver: SALT FORK ARKANSAS RIVER
1.6 MI N JCT US 60, Grant, OK
Built 1962 Load: 27.2 t ADT: 1,500
N3010
FairOver: POLECAT CREEK
.3N 5.2E 2.3S OF MEDFORD, Grant, OK
Built 1990 Load: 27.2 t ADT: 51
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.