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.

Total bridges

449

Public highway bridges in Grady County

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

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).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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.

Bridge inventory size and condition shares for Grady County and the 5 Oklahoma counties closest to it in inventory size
County Bridges Poor
Kiowa County 477 2.9%
Grant County 476 7.4%
Le Flore County 469 11.3%
Lincoln County 450 13.3%
Grady County (this page) 449 7.1%
Caddo County 424 12.5%

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).

Similar average build year

Nearest mean year-built outside OK (1980 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 449 Good 115 Fair 302 Poor 32

All bridges (449)

N2800

Good

Over: CREEK

7.5 S 1. E OF ACME, Grady, OK

Built 2001 Load: 31.8 t ADT: 24

U.S. 62

Good

Over: WASHITA RIVER

1.9 E U.S. 81, Grady, OK

Built 2022 Load: 32.6 t ADT: 4,100

U.S. 81

Good

Over: CREEK

4.4 MI N STEPHENS CO, Grady, OK

Built 1955 Load: 32.7 t ADT: 7,000

BAILEY A TP (I-44)

Good

Over: CREEK

T.P.BR NO 19.02, Grady, OK

Built 1963 Load: 32.7 t ADT: 19,300

BAILEY A TP (I-44)

Good

Over: CREEK

T.P BR NO 8.66, Grady, OK

Built 1963 Load: 32.7 t ADT: 19,300

BAILEY A TP (I-44)

Good

Over: BITTER CREEK OFLOW

T.P.BR NO.18.55, Grady, OK

Built 1964 Load: 32.7 t ADT: 19,300

U.S. 81

Good

Over: CREEK

1.2 MI N SH17, Grady, OK

Built 1967 Load: 32.7 t ADT: 5,700

U.S. 81

Good

Over: CREEK

4.0 MI N SH17, Grady, OK

Built 1967 Load: 32.7 t ADT: 6,300

U.S. 81

Good

Over: CREEK

18.4 MI N JCT US 62, Grady, OK

Built 1979 Load: 32.7 t ADT: 4,600

U.S. 62

Good

Over: CREEK

0.1 MI NE SH39, Grady, OK

Built 1983 Load: 32.7 t ADT: 2,600

U.S. 81

Good

Over: BUCKHORN CREEK

1.9 MI N STEPHENS CO, Grady, OK

Built 1987 Load: 32.7 t ADT: 7,200

S.H. 37

Good

Over: COAL CREEK

5.9 MI E SH92, Grady, OK

Built 1997 Load: 32.7 t ADT: 12,100

U.S. 62

Good

Over: CREEK

1.0 MI NE SH39, Grady, OK

Built 1998 Load: 32.7 t ADT: 2,600

BAILEY NORMAN SPUR

Good

Over: CREEK

MP 0.90, Grady, OK

Built 2000 Load: 32.7 t ADT: 5,400

BAILEY NORMAN SPUR

Good

Over: CREEK

MP 2.17, Grady, OK

Built 2000 Load: 32.7 t ADT: 5,400

U.S. 62

Good

Over: CREEK

2.1 MI E CADDO CO, Grady, OK

Built 2001 Load: 32.7 t ADT: 6,500

E1425 (2622C)

Good

Over: LITTLE WASHITA TRIB

.5S 1.3E of JCT US81/277, Grady, OK

Built 2021 Load: 32.7 t ADT: 310

IRR N2760 BURTSCH

Good

Over: LAKE BURTSCHI

2.4N US277 & 7W US81, Grady, OK

Built 2020 Load: 32.7 t ADT: 558

U.S. 62

Good

Over: CREEK

1.6 MI NE SH39, Grady, OK

Built 1929 Load: 32.9 t ADT: 2,600

N2750

Good

Over: WASHITA RIVER

.5N .25W OF VERDEN, Grady, OK

Built 2009 Load: 33.6 t ADT: 1,268

BAILEY A TP (I-44)

Good

Over: CREEK

T.P BR. NO.33.16, Grady, OK

Built 1964 Load: 34.4 t ADT: 10,400

2626C

Good

Over: LITTLE WASHITA RIVER

4.S US277 3.5W US 81, Grady, OK

Built 1981 Load: 34.5 t ADT: 116

U.S. 81

Good

Over: LITTLE WASHITA RIV OFLO

18.6 MI N SH17, Grady, OK

Built 1957 Load: 34.9 t ADT: 6,500

BAILEY A TP (I-44)

Good

Over: WEST BILLS CREEK

T P BR NO 36.42, Grady, OK

Built 2008 Load: 35.3 t ADT: 10,400

E1180

Good

Over: BUGGY CREEK

.5S &.5E OF US-81, Grady, OK

Built 2004 Load: 35.4 t ADT: 100

N2960

Good

Over: ROARING CREEK

.8W 1N OF BRADLEY, Grady, OK

Built 2015 Load: 35.4 t ADT: 100

W SILVER CITY RDG

Good

Over: WEST CREEK

0.4W;2.0N JCT SH-37/SH-92, Grady, OK

Built 2008 Load: 35.8 t ADT: 100

U.S. 62

Good

Over: CREEK

2.9 MI E CADDO CO, Grady, OK

Built 1929 Load: 36.3 t ADT: 6,500

S.H. 39

Good

Over: CREEK

0.4 MI E US62, Grady, OK

Built 1953 Load: 36.7 t ADT: 1,600

U.S. 81

Good

Over: CREEK

16.3 MI N US62, Grady, OK

Built 1931 Load: 37.0 t ADT: 3,600

U.S. 62 WB

Good

Over: SLWC R.R. UNDER

8.6 MI E CADDO CO, Grady, OK

Built 1970 Load: 37.2 t ADT: 3,400

U.S. 62 EB

Good

Over: SLWC R.R. UNDER

8.6 MI E CADDO CO, Grady, OK

Built 1970 Load: 37.2 t ADT: 4,150

N2800

Good

Over: LITTLE WASHITA RIVER

.4N OF FARWELL, Grady, OK

Built 2011 Load: 37.2 t ADT: 116

S.H. 19

Good

Over: WASHITA RIVER

1 NW GARVIN C/L, Grady, OK

Built 2016 Load: 37.2 t ADT: 2,100

U.S. 62

Good

Over: CREEK

3.8 MI W SH39, Grady, OK

Built 1927 Load: 38.6 t ADT: 7,700

E1230

Good

Over: WEST IONINE CREEK

8.4W 5.5S OF US81, Grady, OK

Built 2006 Load: 39.0 t ADT: 100

S.H. 37

Good

Over: CREEK

7.8 MI E US81, Grady, OK

Built 1946 Load: 40.2 t ADT: 2,800

U.S. 81

Good

Over: CREEK

11.8 MI N SH 19, Grady, OK

Built 1957 Load: 40.7 t ADT: 6,600

E1290

Good

Over: CREEK

5.8N 2E JCT US81/62, Grady, OK

Built 2003 Load: 40.8 t ADT: 100

S.H. 37

Good

Over: COAL CREEK

6.4 MI E SH92, Grady, OK

Built 1997 Load: 41.7 t ADT: 12,100

E1280

Good

Over: W FORK SALT CREEK

.5E 6.8N JCT US81 US 62, Grady, OK

Built 1987 Load: 42.6 t ADT: 100

2614C

Good

Over: EAST FORK CREEK

6.5 MI NE CHICKASHA, Grady, OK

Built 1992 Load: 42.6 t ADT: 44

2682C

Good

Over: LAFLIN CREEK

4 E 3.5 MI N ALEX, Grady, OK

Built 1999 Load: 42.6 t ADT: 50

N2850

Good

Over: SALT CREEK

1.5N 2E OF POCASSET, Grady, OK

Built 2013 Load: 42.6 t ADT: 100

N2920 (2674C)

Good

Over: EAST BITTER CREEK

5E 3.3S OF AMBER, Grady, OK

Built 2014 Load: 42.6 t ADT: 100

E1320

Good

Over: WEST BITTER CREEK

1.9E 4N of JCT US62/SH92, Grady, OK

Built 2019 Load: 42.6 t ADT: 50

E1425 (2622C)

Good

Over: LITTLE WASHITA RIVER

1.1E .5S of JCT US81/277, Grady, OK

Built 2021 Load: 42.6 t ADT: 400

S.H. 37

Good

Over: BUGGY CREEK

.6 E OF U.S. 81, Grady, OK

Built 2013 Load: 43.5 t ADT: 2,200

U.S. 62

Good

Over: WASHITA RIVER

1.9 E U.S. 81, Grady, OK

Built 2021 Load: 44.1 t ADT: 4,100

2648C

Good

Over: WEST BILLS CREEK

4 W 3.3 MI N FARWELL, Grady, OK

Built 1984 Load: 44.5 t ADT: 506

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.