Total bridges
154
Public highway bridges in Johnston County
County profile · official public datasets
Johnston County, OK
154 public highway bridges tracked in the FHWA National Bridge Inventory: 40.3% rated Good, 55.8% Fair, 3.9% Poor.
- 154
- Public bridges
- 40.3%
- Good condition
- 3.9%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Johnston County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 32%
- lowest Poor share in state
- 3.9%
- Poor-condition share
- 154
- 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.
Johnston County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Johnston County ranks #25 of 77 Oklahoma counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.9%). Johnston County, Oklahoma contains 154 public highway bridges. Roughly 40.3% are rated “Good,” 55.8% “Fair,” and 3.9% “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
40.3%
62 of 154 rated 7-9
Fair condition
55.8%
86 of 154 rated 5-6
Poor condition
3.9%
6 of 154 rated 4 or below
In-state Poor-share rank
#25 of 77
Among Oklahoma counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 154 NBI-tracked bridges by lowest applicable component rating.
Good 40.3% (62)
Fair 55.8% (86)
Poor 3.9% (6)
Johnston County's Poor-condition bridges carry 449 vehicle crossings a day
That is 0.5% of the county's reported daily bridge traffic on 3.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 75 crossings a day against 979 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 154 of 154 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
42.9% of Johnston County's bridges have passed the 50-year mark
66 of the 154 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 40.3% 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 31.2% of the county's Poor-condition bridge traffic
3542C over CREEK, built 1984, carries 140 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 6-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 449 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Johnston County's bridges were built
154 bridges with a recorded construction year, grouped by decade
- 1910s 5
1910–1919
5 bridges
- 1920s 2
1920–1929
2 bridges
- 1930s
1930–1939
17 bridges
- 1940s
1940–1949
18 bridges
- 1950s 6
1950–1959
6 bridges
- 1960s
1960–1969
14 bridges
- 1970s
1970–1979
13 bridges
- 1980s
1980–1989
20 bridges
- 1990s
1990–1999
17 bridges
- 2000s
2000–2009
16 bridges
- 2010s
2010–2019
22 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 2010s, when 22 of the county's bridges still in the inventory were built, which is 14.3% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year (1976) matches the Oklahoma average (1977).
How Johnston County compares with Oklahoma's closest counties by inventory size
The 5 Oklahoma counties nearest Johnston County in number of bridges, with their condition splits. Its 3.9% Poor share is the 3rd-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.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Delaware County | 160 | 34.4% | 47.5% | 18.1% | 1975 |
| Haskell County | 155 | 36.8% | 56.8% | 6.5% | 1972 |
| Johnston County (this page) | 154 | 40.3% | 55.8% | 3.9% | 1976 |
| Roger Mills County | 153 | 92.2% | 7.8% | 0% | 1982 |
| Ellis County | 152 | 40.1% | 59.9% | 0% | 1975 |
| Jefferson County | 150 | 46.7% | 46% | 7.3% | 1975 |
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 Johnston 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 Johnston County, both outside Oklahoma so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside OK (154 bridges here).
- Choctaw County, AL · 154 bridges
- Arkansas County, AR · 154 bridges
- Kootenai County, ID · 154 bridges
- Elk County, KS · 154 bridges
Similar average build year
Nearest mean year-built outside OK (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
- New Castle County, DE · avg 1976 · 527 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (6)
E1870
PoorOver: SANDY CREEK
2 N & 3.3 W OF FILMORE, Johnston, OK
Built 1940 Load: 10.0 t ADT: 100
OLD ST. HWY. 22
PoorOver: BIG SANDY CREEK
ROAD TO SANDY CREEK, Johnston, OK
Built 1920 Load: 13.6 t ADT: 35
E1954
PoorOver: CAMP CREEK
.4 S & .6 E OF MANNSVILLE, Johnston, OK
Built 1946 Load: 17.2 t ADT: 50
E1917
PoorOver: CREEK
.4 S & 1.7 W OF RAVIA, Johnston, OK
Built 1948 Load: 19.1 t ADT: 100
3542C
PoorOver: CREEK
1.3 S & .5 E OF FILMORE, Johnston, OK
Built 1984 Load: 19.1 t ADT: 140
E1880
PoorOver: CREEK
3.6 N OF TISHAMINGO, Johnston, OK
Built 1968 Load: 27.2 t ADT: 24
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.