County profile · official public datasets

Blaine County, OK

272 public highway bridges tracked in the FHWA National Bridge Inventory: 66.9% rated Good, 26.1% Fair, 7% Poor.

272
Public bridges
66.9%
Good condition
7%
Poor condition

The verdict

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

Blaine County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

44th
of 77 on Poor share
7%
Poor-condition share
272
public highway bridges
1976
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.

Blaine County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Blaine County ranks #44 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7%). Blaine County, Oklahoma contains 272 public highway bridges. Roughly 66.9% are rated “Good,” 26.1% “Fair,” and 7% “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

272

Public highway bridges in Blaine County

Good condition

66.9%

182 of 272 rated 7-9

Fair condition

26.1%

71 of 272 rated 5-6

Poor condition

7%

19 of 272 rated 4 or below

In-state Poor-share rank

#44 of 77

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

Condition distribution

Share of 272 NBI-tracked bridges by lowest applicable component rating.

Good
66.9% (182)
Fair
26.1% (71)
Poor
7% (19)

Blaine County's Poor-condition bridges carry 1,100 vehicle crossings a day

That is 0.8% of the county's reported daily bridge traffic on 7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 58 crossings a day against 647 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 272 of 272 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

48.2% of Blaine County's bridges have passed the 50-year mark

131 of the 272 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 66.9% 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 9.1% of the county's Poor-condition bridge traffic

E0660 over N. CANADIAN RIVER, built 1915, carries 100 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 19-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,100 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Blaine County's bridges were built

272 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1930s, when 42 of the county's bridges still in the inventory were built, which is 15.4% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year (1976) matches the Oklahoma average (1977).

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

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

The 5 Oklahoma counties nearest Blaine County in number of bridges, with their condition splits. Its 7% Poor share is the 2nd-lowest of these 6. Its average build year of 1976 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 Blaine County and the 5 Oklahoma counties closest to it in inventory size
County Bridges Poor
Rogers County 272 9.2%
Blaine County (this page) 272 7%
Ottawa County 271 21.8%
Major County 266 8.3%
McCurtain County 265 11.7%
Sequoyah County 263 4.6%

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 Blaine 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 Blaine County, both outside Oklahoma so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OK (272 bridges here).

Similar average build year

Nearest mean year-built outside OK (1976 here).

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

All 272 Good 182 Fair 71 Poor 19

Good-condition bridges (182)

N2560

Good

Over: SAND CREEK

6E 1.9N OF LONGDALE, Blaine, OK

Built 2016 Load: 39.9 t ADT: 50

U.S. 270

Good

Over: RELAY CREEK

5.2 MI S JCT S.H. 33, Blaine, OK

Built 1998 Load: 40.8 t ADT: 2,500

E0610

Good

Over: CREEK

1N 3.6W OF OKEENE, Blaine, OK

Built 2001 Load: 40.8 t ADT: 50

S.H. 8

Good

Over: SALT CREEK

7.3 S JCT S.H. 51, Blaine, OK

Built 2020 Load: 42.4 t ADT: 1,300

0610C

Good

Over: N. CANADIAN RIVER

3. S .9 E OF CANTON, Blaine, OK

Built 1988 Load: 42.6 t ADT: 95

E0590

Good

Over: ELM CREEK

3N 1.6W OF OKEENE, Blaine, OK

Built 2005 Load: 42.6 t ADT: 30

N2500

Good

Over: CREEK

2.5E; 9.8S OF SH58/270, Blaine, OK

Built 2011 Load: 42.6 t ADT: 100

IRR E0910

Good

Over: CREEK

4.5N 13.5W OF GEARY, Blaine, OK

Built 2011 Load: 42.6 t ADT: 30

S.H. 51 ALT.

Good

Over: U.S. GYPSUM RD. UNDER

2.9 MI. N JCT S.H. 51, Blaine, OK

Built 1974 Load: 43.3 t ADT: 620

U.S. 270

Good

Over: CREEK

7.8 MI S JCT S.H. 33, Blaine, OK

Built 2006 Load: 43.5 t ADT: 2,450

State Highway 58A

Good

Over: Canton L on Aux Channel

2 MI. N. Canton OK, Blaine, OK

Built 2012 Load: 44.1 t ADT: 610

FAS 0619

Good

Over: CREEK

4.0 W 3.0 S OKEENE, Blaine, OK

Built 1985 Load: 44.5 t ADT: 60

E2670

Good

Over: SALT CREEK

5S 2.7E OF OKEENE, Blaine, OK

Built 2002 Load: 44.5 t ADT: 100

N2570

Good

Over: RELAY CREEK

5.0 S OF JCT. SH-3 / SH-8, Blaine, OK

Built 2008 Load: 44.5 t ADT: 50

S.H. 51

Good

Over: CREEK

0.3 MI W S.H. 8 OKEENE, Blaine, OK

Built 1947 Load: 44.7 t ADT: 2,400

S.H. 51 ALT.

Good

Over: CREEK

4.6 MI N JCT S.H. 51, Blaine, OK

Built 1967 Load: 44.9 t ADT: 620

N2450

Good

Over: CREEK

14.5 W 3.7 N GREENFIEL, Blaine, OK

Built 1990 Load: 46.3 t ADT: 30

IRR E0920

Good

Over: SQUAW CREEK

3.5N; 11.5W OF GEARY, Blaine, OK

Built 1998 Load: 49.0 t ADT: 50

E0770

Good

Over: CREEK

3.5 N 4.8 W WATONGA, Blaine, OK

Built 1996 Load: 49.9 t ADT: 30

N2610

Good

Over: CREEK

2.6N 2W OF OKEEN, Blaine, OK

Built 2001 Load: 50.8 t ADT: 100

S.H. 8

Good

Over: CREEK

12.6 N JCT US-270 WATONGA, Blaine, OK

Built 1953 Load: 53.5 t ADT: 1,300

U.S. 270

Good

Over: CREEK

10.0 MI S JCT S.H. 33, Blaine, OK

Built 2006 Load: 53.5 t ADT: 2,450

U.S. 270

Good

Over: CREEK

7.4 MI S JCT S.H. 33, Blaine, OK

Built 2006 Load: 53.5 t ADT: 2,450

N2550

Good

Over: CREEK

2W 6.2S HWY 281/270 JCT, Blaine, OK

Built 2020 Load: 53.5 t ADT: 50

S.H. 8

Good

Over: SPRING CREEK

1.2 S JCT S.H. 51, Blaine, OK

Built 2019 Load: 57.2 t ADT: 1,770

U.S. 270 /U.S. 281

Good

Over: CREEK

7.6 MI S/E JCT S.H. 33, Blaine, OK

Built 2002 Load: 62.6 t ADT: 2,400

E0890

Good

Over: CREEK

8.8W OF GREENFIELD, Blaine, OK

Built 2001 Load: 63.5 t ADT: 75

IRR N2510

Good

Over: WEAVER CREEK

2.3S 6.5W of WATONGA, Blaine, OK

Built 2020 Load: 73.5 t ADT: 30

S.H. 51

Good

Over: N. CANADIAN RIVER OFLOW

3.5 E OF DEWEY C/L, Blaine, OK

Built 2018 Load: 84.6 t ADT: 2,400

U.S. 270

Good

Over: CREEK

4.6 MI S S.H. 33 WATONGA, Blaine, OK

Built 1930 Load: 88.1 t ADT: 5,000

S.H. 58

Good

Over: CREEK

5.4 MI N JCT S.H. 33, Blaine, OK

Built 1932 Load: 99.9 t ADT: 870

U.S. 270

Good

Over: CREEK

7.7 MI E DEWEY C/L, Blaine, OK

Built 1937 Load: 99.9 t ADT: 4,800

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

Related

Browse all → | Rankings →
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.