Total bridges
476
Public highway bridges in Johnson County
County profile · official public datasets
Johnson County, MO
476 public highway bridges tracked in the FHWA National Bridge Inventory: 39.3% rated Good, 56.3% Fair, 4.4% Poor.
- 476
- Public bridges
- 39.3%
- Good condition
- 4.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Johnson County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 14%
- lowest Poor share in state
- 4.4%
- Poor-condition share
- 476
- public highway bridges
- 1975
- 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 #16 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.4%). Johnson County, Missouri contains 476 public highway bridges. Roughly 39.3% are rated “Good,” 56.3% “Fair,” and 4.4% “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
39.3%
187 of 476 rated 7-9
Fair condition
56.3%
268 of 476 rated 5-6
Poor condition
4.4%
21 of 476 rated 4 or below
In-state Poor-share rank
#16 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 476 NBI-tracked bridges by lowest applicable component rating.
Good 39.3% (187)
Fair 56.3% (268)
Poor 4.4% (21)
Johnson County's Poor-condition bridges carry 18,285 vehicle crossings a day
That is 4.1% of the county's reported daily bridge traffic on 4.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 871 crossings a day against 642 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 476 of 476 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
30.7% of Johnson County's bridges have passed the 50-year mark
146 of the 476 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 39.3% 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 45.6% of the county's Poor-condition bridge traffic
US 50 E over UP RR, built 1968, carries 8,346 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 21-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 18,285 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
476 bridges with a recorded construction year, grouped by decade
- 1900s
1900–1909
84 bridges
- 1910s 3
1910–1919
3 bridges
- 1920s 10
1920–1929
10 bridges
- 1930s 6
1930–1939
6 bridges
- 1940s 2
1940–1949
2 bridges
- 1950s 20
1950–1959
20 bridges
- 1960s 19
1960–1969
19 bridges
- 1970s 5
1970–1979
5 bridges
- 1980s 43
1980–1989
43 bridges
- 1990s
1990–1999
151 bridges
- 2000s
2000–2009
78 bridges
- 2010s 52
2010–2019
52 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1990s, when 151 of the county's bridges still in the inventory were built, which is 31.7% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1975) matches the Missouri average (1979).
How Johnson County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Johnson County in number of bridges, with their condition splits. Its 4.4% Poor share is the 3rd-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1981 is 6 years older.
Showing the 5 closest of 114 Missouri counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Greene County | 493 | 44.6% | 50.1% | 5.3% | 1978 |
| Johnson County (this page) | 476 | 39.3% | 56.3% | 4.4% | 1975 |
| Jasper County | 471 | 42% | 46.9% | 11% | 1978 |
| Clay County | 436 | 38.1% | 55% | 6.9% | 1979 |
| Stoddard County | 434 | 43.1% | 53.2% | 3.7% | 1976 |
| St. Charles County | 417 | 32.4% | 64.3% | 3.4% | 1994 |
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 Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (476 bridges here).
- Grant County, OK · 476 bridges
- Providence County, RI · 476 bridges
- Tangipahoa County, LA · 477 bridges
- Kiowa County, OK · 477 bridges
Similar average build year
Nearest mean year-built outside MO (1975 here).
- San Bernardino County, CA · avg 1975 · 1,422 bridges
- Lane County, OR · avg 1975 · 1,010 bridges
- Fulton County, GA · avg 1975 · 775 bridges
- Westmoreland County, PA · avg 1975 · 620 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (476)
CO RD SW 100
FairOver: BRIAR CR
S 28 T 46 N R 27 W, Johnson, MO
Built 1900 Load: 0.0 t ADT: 35
CO RD SE 201
FairOver: TRIB OF MINERAL CR
S 5 T 44 N R 25 W, Johnson, MO
Built 1900 Load: 0.9 t ADT: 40
CO RD SW 301
FairOver: BR OF POST OAK CR
S 29 T 46 N R 26 W, Johnson, MO
Built 1900 Load: 2.7 t ADT: 65
CO RD 1201
FairOver: BR OF LIT WALNUT C
S 35 T 47 N R 24 W, Johnson, MO
Built 1900 Load: 5.4 t ADT: 22
CO RD 1001
FairOver: BR BLACKWATER RVR
S 3 T 47 N R 24 W, Johnson, MO
Built 1900 Load: 5.4 t ADT: 45
CO RD NW 701
FairOver: HONEY CR
S 14 T 47 N R 27 W, Johnson, MO
Built 1994 Load: 6.3 t ADT: 45
CO RD SE 971
FairOver: BR OF MUDDY CR
S 4 T 44 N R 24 W, Johnson, MO
Built 1900 Load: 7.2 t ADT: 45
CO RD SE 750
FairOver: MUD CR
S 35 T 45 N R 24 W, Johnson, MO
Built 1992 Load: 9.0 t ADT: 60
CO RD SE 201
FairOver: W BEAR CR
S 31 T 46 N R 25 W, Johnson, MO
Built 1900 Load: 9.9 t ADT: 45
CO RD SW 1501
FairOver: BR OF W POST OAK C
S 16 T 45 N R 28 W, Johnson, MO
Built 1900 Load: 9.9 t ADT: 46
CO RD SW 1200
FairOver: BEAR CR
S 24 T 44 N R 28 W, Johnson, MO
Built 1998 Load: 9.9 t ADT: 35
CO RD NE 175
FairOver: TRIB BLACKWATER RV
S 7 T 46 N R 25 W, Johnson, MO
Built 1995 Load: 9.9 t ADT: 50
CO RD NW 700
FairOver: BR OF WALNUT CR
S 15 T 47 N R 26 W, Johnson, MO
Built 1900 Load: 11.7 t ADT: 143
CO RD NW 1621
FairOver: BR S FK BLACKWATER
S 19 T 46 N R 28 W, Johnson, MO
Built 1930 Load: 11.7 t ADT: 45
CO RD SW 450
FairOver: W BR OF LOST CR
S 14 T 45 N R 29 W, Johnson, MO
Built 1908 Load: 11.7 t ADT: 45
COLLEGE ST
FairOver: UP RR
S 24 T 46 N R 26 W, Johnson, MO
Built 1952 Load: 11.7 t ADT: 4,000
CO RD SW 1301
FairOver: BEAR CR
S 14 T 44 N R 28 W, Johnson, MO
Built 1996 Load: 11.7 t ADT: 40
CO RD NW 400
FairOver: BR OF HONEY CR
S 6 T 46 N R 26 W, Johnson, MO
Built 1999 Load: 12.6 t ADT: 159
CO RD NE 710
FairOver: BLACKJACK CR
S 16 T 47 N R 25 W, Johnson, MO
Built 1988 Load: 12.6 t ADT: 110
CO RD NE 600
FairOver: WALNUT CR
S 21 T 47 N R 24 W, Johnson, MO
Built 1982 Load: 12.6 t ADT: 45
CO RD SW 625
FairOver: BR E FK FLECHER CR
S 35 T 45 N R 26 W, Johnson, MO
Built 2000 Load: 12.6 t ADT: 30
CO RD NW 575
FairOver: WALNUT CR
S 27 T 47 N R 26 W, Johnson, MO
Built 1900 Load: 13.5 t ADT: 45
CO RD SW 700
FairOver: COON CR
S 30 T 45 N R 28 W, Johnson, MO
Built 1900 Load: 13.5 t ADT: 110
CO RD SW 400
FairOver: E PIN OAK CR
S 10 T 45 N R 28 W, Johnson, MO
Built 1900 Load: 13.5 t ADT: 81
CO RD SE 471
FairOver: BR CLEAR FK
S 27 T 45 N R 25 W, Johnson, MO
Built 1980 Load: 13.5 t ADT: 73
CO RD NE 900
FairOver: WALNUT CR
S 5 T 47 N R 24 W, Johnson, MO
Built 1900 Load: 14.4 t ADT: 110
CO RD SE 671
FairOver: BR CLEAR FK
S 12 T 45 N R 25 W, Johnson, MO
Built 1900 Load: 14.4 t ADT: 45
US 50 E
FairOver: TRIB BLACKWATER RV
S 14 T 46 N R 27 W, Johnson, MO
Built 1924 Load: 14.4 t ADT: 17,437
CO RD 1571
FairOver: N FK OF BLACKWATER
S 10 T 47 N R 28 W, Johnson, MO
Built 1900 Load: 16.2 t ADT: 45
CO RD 550
FairOver: S FK OF BLACKWATER
S 30 T 47 N R 28 W, Johnson, MO
Built 1925 Load: 16.2 t ADT: 110
CO RD NW 550
FairOver: BR S FK BLACKWATER
S 30 T 47 N R 28 W, Johnson, MO
Built 1925 Load: 16.2 t ADT: 110
CO RD NE 451
FairOver: MULKEY CR
S 27 T 48 N R 25 W, Johnson, MO
Built 1988 Load: 16.2 t ADT: 60
CO RD NE 600
FairOver: CLEAR FK BLACKWAT
S 25 T 47 N R 25 W, Johnson, MO
Built 1982 Load: 16.2 t ADT: 45
CO RD NE 951
FairOver: ARM OF WALNUT CR
S 9 T 47 N R 24 W, Johnson, MO
Built 1988 Load: 16.2 t ADT: 30
E. DIVISION RD
FairOver: BEAR CR
S 20 T 46 N R 25 W, Johnson, MO
Built 1900 Load: 16.2 t ADT: 110
W DIVISION RD
FairOver: E FK POST OAK CR
S 22 T 46 N R 26 W, Johnson, MO
Built 1900 Load: 16.2 t ADT: 285
CO RD SW 200
FairOver: W FK POST OAK CR
S 2 T 45 N R 26 W, Johnson, MO
Built 1973 Load: 16.2 t ADT: 311
CO RD SW 51
FairOver: BRAWLEY CR
S 26 T 45 N R 26 W, Johnson, MO
Built 1900 Load: 16.2 t ADT: 60
CO RD SE 250
FairOver: W BEAR CR
S 6 T 45 N R 25 W, Johnson, MO
Built 1900 Load: 16.2 t ADT: 45
CO RD NE 101
FairOver: BLACKJACK CR
S 13 T 47 N R 25 W, Johnson, MO
Built 1982 Load: 17.1 t ADT: 65
CO RD NE 251
FairOver: BR F BLACKWATER RV
S 5 T 46 N R 25 W, Johnson, MO
Built 1930 Load: 17.1 t ADT: 78
CO RD SW 600
FairOver: W FK PIN OAK CR
S 20 T 45 N R 27 W, Johnson, MO
Built 1900 Load: 17.1 t ADT: 50
CO RD SW 800
FairOver: HOGAN FK
S 32 T 45 N R 26 W, Johnson, MO
Built 1900 Load: 17.1 t ADT: 45
CO RD SW 51
FairOver: BRAWLEY CR
S 26 T 45 N R 26 W, Johnson, MO
Built 1996 Load: 17.1 t ADT: 45
CO RD NW 100
FairOver: S FK BLACKWATER RV
S 16 T 46 N R 28 W, Johnson, MO
Built 1900 Load: 17.1 t ADT: 45
CO RD NW 21
FairOver: WHITE OAK CR
S 16 T 45 N R 28 W, Johnson, MO
Built 1988 Load: 17.1 t ADT: 110
CO RD NW 500
FairOver: TRIB OF EAST BR
S 27 T 47 N R 29 W, Johnson, MO
Built 1900 Load: 18.0 t ADT: 60
CO RD NW 450
FairOver: BR S FK BLACKWATER
S 35 T 47 N R 29 W, Johnson, MO
Built 1900 Load: 18.0 t ADT: 61
CO RD NW 571
FairOver: HONEY CR
S 13 T 47 N R 27 W, Johnson, MO
Built 1900 Load: 18.0 t ADT: 45
CO RD 600
FairOver: HONEY CR
S 19 T 47 N R 26 W, Johnson, MO
Built 1909 Load: 18.0 t ADT: 110
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.