Total bridges
99
Public highway bridges in Johnson County
County profile · official public datasets
Johnson County, KY
99 public highway bridges tracked in the FHWA National Bridge Inventory: 27.3% rated Good, 69.7% Fair, 3% Poor.
- 99
- Public bridges
- 27.3%
- Good condition
- 3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Johnson County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 12%
- lowest Poor share in state
- 3%
- Poor-condition share
- 99
- public highway bridges
- 1983
- 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.
Johnson County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Johnson County ranks #14 of 120 Kentucky counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3%). Johnson County, Kentucky contains 99 public highway bridges. Roughly 27.3% are rated “Good,” 69.7% “Fair,” and 3% “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
27.3%
27 of 99 rated 7-9
Fair condition
69.7%
69 of 99 rated 5-6
Poor condition
3%
3 of 99 rated 4 or below
In-state Poor-share rank
#14 of 120
Among Kentucky counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 99 NBI-tracked bridges by lowest applicable component rating.
Good 27.3% (27)
Fair 69.7% (69)
Poor 3% (3)
Johnson County's Poor-condition bridges carry 1,466 vehicle crossings a day
That is 0.9% of the county's reported daily bridge traffic on 3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 489 crossings a day against 1,005 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 99 of 99 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
29.3% of Johnson County's bridges have passed the 50-year mark
29 of the 99 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 27.3% 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 75.1% of the county's Poor-condition bridge traffic
KY-825 over Jennys Creek, built 1975, carries 1,101 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 3-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,466 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Johnson County's bridges were built
99 bridges with a recorded construction year, grouped by decade
- 1930s 3
1930–1939
3 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s
1950–1959
13 bridges
- 1960s 7
1960–1969
7 bridges
- 1970s 11
1970–1979
11 bridges
- 1980s 8
1980–1989
8 bridges
- 1990s
1990–1999
30 bridges
- 2000s
2000–2009
13 bridges
- 2010s 8
2010–2019
8 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1990s, when 30 of the county's bridges still in the inventory were built, which is 30.3% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1983, 5 years newer than the Kentucky average of 1978.
How Johnson County compares with Kentucky's closest counties by inventory size
The 5 Kentucky counties nearest Johnson County in number of bridges, with their condition splits. Its 3% Poor share is the 1st-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1976 is 7 years newer.
Showing the 5 closest of 119 Kentucky counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Lawrence County | 103 | 19.4% | 72.8% | 7.8% | 1983 |
| Bullitt County | 99 | 10.1% | 81.8% | 8.1% | 1980 |
| Johnson County (this page) | 99 | 27.3% | 69.7% | 3% | 1983 |
| Butler County | 98 | 9.2% | 81.6% | 9.2% | 1971 |
| Mason County | 97 | 33% | 58.8% | 8.2% | 1980 |
| Fulton County | 95 | 26.3% | 62.1% | 11.6% | 1965 |
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 Johnson 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 Johnson County, both outside Kentucky so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside KY (99 bridges here).
- Washington County, FL · 99 bridges
- Crisp County, GA · 99 bridges
- Harris County, GA · 99 bridges
- Newton County, GA · 99 bridges
Similar average build year
Nearest mean year-built outside KY (1983 here).
- Dallas County, TX · avg 1983 · 3,230 bridges
- Bexar County, TX · avg 1983 · 2,342 bridges
- Sedgwick County, KS · avg 1983 · 1,333 bridges
- Will County, IL · avg 1983 · 649 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (69)
KY-321
FairOver: Paint Creek
.05 MI S of JCT KY-40, Johnson, KY
Built 1987 Load: 50.2 t ADT: 12,825
Tick Vanhoose Br
FairOver: Toms Creek
50 N of JCT KY 201, Johnson, KY
Built 1998 Load: 50.4 t ADT: 952
ASA CREEK RD
FairOver: JENNYS CREEK
.1 MI W OF JCT KY 825, Johnson, KY
Built 1977 Load: 52.0 t ADT: 328
KY-321X
FairOver: Paint Creek
0.15 MI N of JCT KY 321, Johnson, KY
Built 1936 Load: 52.1 t ADT: 4,693
Campbell Branch Rd
FairOver: Sycamore Fork
0.1 MI W of JCT US 23, Johnson, KY
Built 1982 Load: 52.2 t ADT: 655
KY-2040
FairOver: GREASY CREEK
0.10 MI NW of JCT KY 40, Johnson, KY
Built 2006 Load: 55.8 t ADT: 396
KY-469
FairOver: KEATON FORK
1.3 MI SW OF JCT KY 1092, Johnson, KY
Built 1975 Load: 55.9 t ADT: 219
KY-40
FairOver: PAINT CREEK
.043 MI. W JCT KY 580, Johnson, KY
Built 1997 Load: 56.8 t ADT: 1,324
US-23
FairOver: KY-825/Lick Fork
@ JCT KY 825, Johnson, KY
Built 1996 Load: 58.7 t ADT: 4,687
Rocky Knob Branch
FairOver: Mudlick Creek
@ JCT of KY 172, Johnson, KY
Built 1986 Load: 59.9 t ADT: 257
US-460
FairOver: Paint Creek
0.5 MI W of Jct US 23, Johnson, KY
Built 1978 Load: 60.1 t ADT: 4,749
KY-40
FairOver: Levisa Fork
0.1 MI E of JCT KY 581, Johnson, KY
Built 1958 Load: 62.5 t ADT: 7,395
KY-825
FairOver: JENNYS CREEK
.63 MI. E. JCT KY 2039, Johnson, KY
Built 1994 Load: 65.0 t ADT: 573
KY-3390
FairOver: Hammonds Creek
2.5 MI N OF JCT KY 40, Johnson, KY
Built 2015 Load: 65.2 t ADT: 156
KY-40
FairOver: STATE ROAD FORK
2.95MI. E. JCT KY 580, Johnson, KY
Built 1997 Load: 65.7 t ADT: 1,530
US-23 NC
FairOver: Toms Creek
0.1 MI E of JCT KY 1559, Johnson, KY
Built 1982 Load: 66.3 t ADT: 4,082
US-23
FairOver: Toms Creek
0.1 MI E of JCT KY 1559, Johnson, KY
Built 1969 Load: 69.9 t ADT: 4,082
KY-2378
FairOver: PAINT CREEK
JCT KY321BY-PASS, Johnson, KY
Built 1979 Load: 72.8 t ADT: 3,585
KY-1092
FairOver: UPPER LAUREL CREEK
1.2 MI NW OF W-JCT KY 689, Johnson, KY
Built 1958 Load: 97.2 t ADT: 583
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.