County profile · official public datasets

Pittsburg County, OK

411 public highway bridges tracked in the FHWA National Bridge Inventory: 47.2% rated Good, 45% Fair, 7.8% Poor.

411
Public bridges: 47.2%
Good condition: 7.8%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Pittsburg County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

49th
of 77 on Poor share: 7.8%
Poor-condition share: 411
public highway bridges: 1971
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.

Pittsburg County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Pittsburg County ranks #49 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.8%). Pittsburg County, Oklahoma contains 411 public highway bridges. Roughly 47.2% are rated “Good,” 45% “Fair,” and 7.8% “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

411

Public highway bridges in Pittsburg County

Good condition

47.2%

194 of 411 rated 7-9

Fair condition

45%

185 of 411 rated 5-6

Poor condition

7.8%

32 of 411 rated 4 or below

In-state Poor-share rank

#49 of 77

Among Oklahoma counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 411 NBI-tracked bridges by lowest applicable component rating.

Good

47.2% (194)

Fair

45% (185)

Poor

7.8% (32)

Pittsburg County's Poor-condition bridges carry 10,415 vehicle crossings a day

That is 1.2% of the county's reported daily bridge traffic on 7.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 325 crossings a day against 2,122 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 411 of 411 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

57.2% of Pittsburg County's bridges have passed the 50-year mark

235 of the 411 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 47.2% 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 36.5% of the county's Poor-condition bridge traffic

IND. NATION TP over CREEK, built 1968, carries 3,800 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 10,415 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

8
1930s

60
1940s

32
1950s

43
1960s

88
1970s

27
1980s

39
1990s

42
2000s

45
2010s

17
2020s

10

What this shows Construction peaked in the 1960s, when 88 of the county's bridges still in the inventory were built, which is 21.4% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1971, 6 years older than the Oklahoma average of 1977.

How Pittsburg County compares with Oklahoma's closest counties by inventory size

The 5 Oklahoma counties nearest Pittsburg County in number of bridges, with their condition splits. Its 7.8% Poor share is the 3rd-lowest of these 6. Its average build year of 1971 against a peer-group mean of 1977 is 6 years older.

Showing the 5 closest of 76 Oklahoma counties eligible for comparison.

Bridge inventory size and condition shares for Pittsburg County and the 5 Oklahoma counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Caddo County	424	24.1%	63.4%	12.5%	1979
Kay County	419	30.3%	63.7%	6%	1979
Pittsburg County (this page)	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 Pittsburg 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 Pittsburg County, both outside Oklahoma so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OK (411 bridges here).

Jefferson County, MO · 411 bridges
Benton County, AR · 410 bridges
Union County, NJ · 409 bridges
Cobb County, GA · 414 bridges

Similar average build year

Nearest mean year-built outside OK (1971 here).

Wayne County, MI · avg 1971 · 1,026 bridges
Baltimore County, MD · avg 1971 · 783 bridges
Washington County, PA · avg 1971 · 655 bridges
Linn County, OR · avg 1971 · 566 bridges

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

All 411 Good 194 Fair 185 Poor 32

Good-condition bridges (194)

Sort:

Pittsburg County Bridge Snapshot

Condition distribution

Pittsburg County's Poor-condition bridges carry 10,415 vehicle crossings a day

57.2% of Pittsburg County's bridges have passed the 50-year mark

One structure carries 36.5% of the county's Poor-condition bridge traffic

How Pittsburg County compares with Oklahoma's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (194)

GRAVEL RD 46LC

N4010

N4010

6168C

E1570

E1520

N4085

E1350

6138C

6120C

6166C

E1420

FAS 6126

FAS 6126

E1480

E1480

6186C

6154C

6126C

6110C

N4190

N4090

6176C

N4110

E1570 (6144C)

N4080

6154C

N3910

E1530

E1595

N4150

E1611

NEW BAKE RD

PLUM ST.

7TH ST.

VINE ST.

U.S. 270

S.H. 31

S.H. 31

S.H. 31

U.S. 270 EB

CO. RD. 6184C

CROWDER RD.

U.S. 270 WB

S.H. 31

S.H. 113

CO. RD. E1435

6112C

N4076 (8 ST.)

6162C

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