Total bridges
449
Public highway bridges in Grady County
County profile · official public datasets
Grady County, OK
449 public highway bridges tracked in the FHWA National Bridge Inventory: 25.6% rated Good, 67.3% Fair, 7.1% Poor.
- 449
- Public bridges
- 25.6%
- Good condition
- 7.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Grady County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 45th
- of 77 on Poor share
- 7.1%
- Poor-condition share
- 449
- public highway bridges
- 1980
- 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.
Grady County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Grady County ranks #45 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.1%). Grady County, Oklahoma contains 449 public highway bridges. Roughly 25.6% are rated “Good,” 67.3% “Fair,” and 7.1% “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
25.6%
115 of 449 rated 7-9
Fair condition
67.3%
302 of 449 rated 5-6
Poor condition
7.1%
32 of 449 rated 4 or below
In-state Poor-share rank
#45 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 449 NBI-tracked bridges by lowest applicable component rating.
Good 25.6% (115)
Fair 67.3% (302)
Poor 7.1% (32)
Grady County's Poor-condition bridges carry 9,048 vehicle crossings a day
That is 1.1% of the county's reported daily bridge traffic on 7.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 283 crossings a day against 4,211 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 449 of 449 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
35.4% of Grady County's bridges have passed the 50-year mark
159 of the 449 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 25.6% 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 26.1% of the county's Poor-condition bridge traffic
N2830 (16 ST) over LINE CREEK, built 1933, carries 2,358 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 32-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 9,048 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Grady County's bridges were built
449 bridges with a recorded construction year, grouped by decade
- 1910s 2
1910–1919
2 bridges
- 1920s 14
1920–1929
14 bridges
- 1930s 26
1930–1939
26 bridges
- 1940s 27
1940–1949
27 bridges
- 1950s 17
1950–1959
17 bridges
- 1960s
1960–1969
59 bridges
- 1970s 19
1970–1979
19 bridges
- 1980s
1980–1989
82 bridges
- 1990s
1990–1999
124 bridges
- 2000s 47
2000–2009
47 bridges
- 2010s 23
2010–2019
23 bridges
- 2020s 9
2020–2029
9 bridges
What this shows Construction peaked in the 1990s, when 124 of the county's bridges still in the inventory were built, which is 27.6% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1980) matches the Oklahoma average (1977).
How Grady County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Grady County in number of bridges, with their condition splits. Its 7.1% Poor share is the 2nd-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1976 is in line with the group.
Showing the 5 closest of 76 Oklahoma counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| 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 |
| Grady County (this page) | 449 | 25.6% | 67.3% | 7.1% | 1980 |
| Caddo County | 424 | 24.1% | 63.4% | 12.5% | 1979 |
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 Grady 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 Grady County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (449 bridges here).
- Washington County, AR · 449 bridges
- Sioux County, IA · 449 bridges
- Barton County, KS · 449 bridges
- Dauphin County, PA · 449 bridges
Similar average build year
Nearest mean year-built outside OK (1980 here).
- Miami-Dade County, FL · avg 1980 · 1,057 bridges
- Pulaski County, AR · avg 1980 · 721 bridges
- McLennan County, TX · avg 1980 · 714 bridges
- Hinds County, MS · avg 1980 · 663 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (302)
N2900
FairOver: CREEK
.5 W .5 N OF SH 37, Grady, OK
Built 1998 Load: 39.9 t ADT: 50
S.H. 19
FairOver: UP R.R. UNDER
0.5 MI W US81, Grady, OK
Built 2002 Load: 39.9 t ADT: 4,000
2690C
FairOver: CREEK
4 S 4.3 MI E DUTTON, Grady, OK
Built 1992 Load: 40.8 t ADT: 180
2642C
FairOver: FOUR MILE CREEK
6 E 4.9 S JCT US81 & SH17, Grady, OK
Built 1993 Load: 40.8 t ADT: 50
E1300
FairOver: CREEK
4.5N; 3.7W US62&US81, Grady, OK
Built 1995 Load: 40.8 t ADT: 100
N2995
FairOver: EAST WINTER CREEK
5.2E 1.4S OF JT US62/SH39, Grady, OK
Built 2005 Load: 40.8 t ADT: 100
E1230
FairOver: CREEK
5.5S 4.3W OF MINCO, Grady, OK
Built 2013 Load: 40.8 t ADT: 100
N2850
FairOver: CREEK
10.5 S 1.5 E OF US 81, Grady, OK
Built 1991 Load: 41.7 t ADT: 50
E1170
FairOver: CREEK
2.E .5N JCT US81 & SH37, Grady, OK
Built 1993 Load: 41.7 t ADT: 100
S.H. 37
FairOver: BUGGY CREEK
1.7E OF CADDO C/L, Grady, OK
Built 2011 Load: 41.7 t ADT: 2,400
2690C
FairOver: CREEK
4.N US62 5.W US81, Grady, OK
Built 1983 Load: 42.6 t ADT: 180
E1340
FairOver: CREEK
2.N .1W JCT US62 SH92, Grady, OK
Built 1986 Load: 42.6 t ADT: 100
2697C
FairOver: WASHITA RIVER
7.5S 13.6E JCT US81 SH19, Grady, OK
Built 1986 Load: 42.6 t ADT: 126
E1260
FairOver: SALT CREEK
8.8N 1.2E JCT US81 & 62, Grady, OK
Built 1988 Load: 42.6 t ADT: 50
2608C
FairOver: CREEK
3.9 MI E AMBER, Grady, OK
Built 1985 Load: 43.5 t ADT: 537
E1290
FairOver: CREEK
1. S 5.5 E OF AMBER, Grady, OK
Built 1993 Load: 43.5 t ADT: 100
2654C
FairOver: CREEK
5. N 3.3 W JCT US62/US81, Grady, OK
Built 1993 Load: 43.5 t ADT: 35
E1520
FairOver: CREEK
2.N SH 17 3.8W US 81, Grady, OK
Built 1994 Load: 43.5 t ADT: 100
E1210
FairOver: CREEK
1.E 2.S JCT SH37 & SH92, Grady, OK
Built 1990 Load: 44.5 t ADT: 100
S.H. 19
FairOver: CREEK
4.4 MI W US81, Grady, OK
Built 2002 Load: 44.5 t ADT: 2,800
N2940
FairOver: RUSH CREEK
2N STEPHENS C/L;2E BAILEY, Grady, OK
Built 2004 Load: 44.5 t ADT: 50
2678C
FairOver: WASHITA RIVER
.5 NE OF ALEX, Grady, OK
Built 1997 Load: 45.4 t ADT: 714
N2940
FairOver: CREEK
3.5 E 1.5 S OF SH 37, Grady, OK
Built 1992 Load: 47.2 t ADT: 200
BAILEY A TP (I-44)
FairOver: BITTER CREEK
T.P.BR NO.18.27, Grady, OK
Built 1964 Load: 47.2 t ADT: 19,300
E1240
FairOver: CREEK
6.5S .4E JCT US81 SH37, Grady, OK
Built 1993 Load: 47.2 t ADT: 100
N2910
FairOver: CREEK
.5 E 6.4 S OF SH 37, Grady, OK
Built 1996 Load: 47.2 t ADT: 326
S.H. 19
FairOver: LITTLE WASHITA RIVER
4.7 MI E US81, Grady, OK
Built 2002 Load: 47.2 t ADT: 2,800
N2810
FairOver: CREEK
2.5N 2W OF POCASSET, Grady, OK
Built 2004 Load: 47.2 t ADT: 100
E1200
FairOver: EAST CREEK
.9E; 1S OF JCT SH37/SH92, Grady, OK
Built 2009 Load: 47.2 t ADT: 200
N2960
FairOver: CREEK
5.5 E 8. S OF SH 92, Grady, OK
Built 1992 Load: 48.1 t ADT: 75
2606C
FairOver: CREEK
6. S 7.2 E OF TUTTLE, Grady, OK
Built 1994 Load: 48.1 t ADT: 72
E1590
FairOver: MURRAY CREEK
5S 10.5E JCT US81/SH17, Grady, OK
Built 2002 Load: 48.1 t ADT: 50
CO. RD. FAU 4020
FairOver: BAILEY A TP (I-44) UNDER
T.P.BR.NO 28.11, Grady, OK
Built 1964 Load: 49.0 t ADT: 200
E1290
FairOver: CREEK
11.5S .5W JCT US81 SH37, Grady, OK
Built 1995 Load: 49.9 t ADT: 100
CO. RD. N2830
FairOver: BAILEY A TP (I-44) UNDER
T.P.BR.NO.28.58, Grady, OK
Built 1964 Load: 50.6 t ADT: 5,000
E1230
FairOver: CREEK
3N 2.1E OF POCASSET, Grady, OK
Built 2004 Load: 50.8 t ADT: 100
2604C
FairOver: SALT CREEK
.5 N 1.5 E OF POCASSET, Grady, OK
Built 1994 Load: 51.7 t ADT: 330
N2800
FairOver: CREEK
8.1 MI N OF FARWELL, Grady, OK
Built 1996 Load: 51.7 t ADT: 100
CO. RD. FAU 4051
FairOver: BAILEY A TP (I-44) UNDER
T.P.BR.NO.27.65, Grady, OK
Built 1964 Load: 52.3 t ADT: 240
E1230
FairOver: CREEK
5.5S 2.8E JCT US81 SH37, Grady, OK
Built 1994 Load: 53.5 t ADT: 50
N2770
FairOver: ROCK HOLLOW CREEK
.9S OF US62&5.3W OF US81, Grady, OK
Built 1989 Load: 56.2 t ADT: 50
E1260
FairOver: CREEK
8.5 S 5.6 W JCT US81, Grady, OK
Built 2000 Load: 56.2 t ADT: 75
U.S. 81
FairOver: UP R.R. UNDER
19.7 MI N US62, Grady, OK
Built 1976 Load: 57.5 t ADT: 4,900
2606C
FairOver: CREEK
6.9 E 6. S OF 92 & 37, Grady, OK
Built 1993 Load: 58.1 t ADT: 72
U.S. 81
FairOver: CREEK
0.6 MI W SH19, Grady, OK
Built 1958 Load: 60.3 t ADT: 8,500
E1260
FairOver: CREEK
1. S .3 E OF DUTTON1, Grady, OK
Built 1995 Load: 60.8 t ADT: 100
U.S. 81
FairOver: CREEK
17.7 MI N SH17, Grady, OK
Built 1957 Load: 64.3 t ADT: 6,300
E1240
FairOver: CREEK
6.8E 5S JCT SH92, Grady, OK
Built 2000 Load: 68.9 t ADT: 100
E SILVER CITY RDG
FairOver: CREEK
2.6E;2.0N JCT SH-37/SH-92, Grady, OK
Built 1998 Load: 70.0 t ADT: 100
E1530
FairOver: CREEK
1.N SH17 4.5W US81, Grady, OK
Built 1992 Load: 71.7 t ADT: 69
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.