Total bridges
230
Public highway bridges in Johnson County
County profile · official public datasets
Johnson County, IN
230 public highway bridges tracked in the FHWA National Bridge Inventory: 41.3% rated Good, 50.4% Fair, 8.3% Poor.
- 230
- Public bridges
- 41.3%
- Good condition
- 8.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Johnson County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- 77th
- of 92 on Poor share
- 8.3%
- Poor-condition share
- 230
- 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 #77 of 92 Indiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.3%). Johnson County, Indiana contains 230 public highway bridges. Roughly 41.3% are rated “Good,” 50.4% “Fair,” and 8.3% “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
41.3%
95 of 230 rated 7-9
Fair condition
50.4%
116 of 230 rated 5-6
Poor condition
8.3%
19 of 230 rated 4 or below
In-state Poor-share rank
#77 of 92
Among Indiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 230 NBI-tracked bridges by lowest applicable component rating.
Good 41.3% (95)
Fair 50.4% (116)
Poor 8.3% (19)
Johnson County's Poor-condition bridges carry 37,360 vehicle crossings a day
That is 2.4% of the county's reported daily bridge traffic on 8.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,966 crossings a day against 10,206 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 230 of 230 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
33.9% of Johnson County's bridges have passed the 50-year mark
78 of the 230 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 41.3% 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 48.2% of the county's Poor-condition bridge traffic
SMITH VALLEY ROAD over CONRAIL RAILROAD, built 1972, carries 18,020 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 37,360 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
230 bridges with a recorded construction year, grouped by decade
- pre-1900 2
Built before 1900
2 bridges
- 1910s 1
1910–1919
1 bridges
- 1920s 2
1920–1929
2 bridges
- 1930s 3
1930–1939
3 bridges
- 1940s 11
1940–1949
11 bridges
- 1950s 9
1950–1959
9 bridges
- 1960s
1960–1969
22 bridges
- 1970s
1970–1979
49 bridges
- 1980s
1980–1989
34 bridges
- 1990s
1990–1999
33 bridges
- 2000s
2000–2009
32 bridges
- 2010s 14
2010–2019
14 bridges
- 2020s 18
2020–2029
18 bridges
What this shows Construction peaked in the 1970s, when 49 of the county's bridges still in the inventory were built, which is 21.3% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1983, 5 years newer than the Indiana average of 1978.
How Johnson County compares with Indiana's closest counties by inventory size
The 5 Indiana counties nearest Johnson County in number of bridges, with their condition splits. Its 8.3% Poor share is the 5th-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1978 is 5 years newer.
Showing the 5 closest of 91 Indiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Greene County | 239 | 43.9% | 46.9% | 9.2% | 1982 |
| Monroe County | 232 | 62.1% | 35.8% | 2.2% | 1988 |
| Johnson County (this page) | 230 | 41.3% | 50.4% | 8.3% | 1983 |
| LaPorte County | 227 | 33.5% | 59.9% | 6.6% | 1972 |
| Rush County | 227 | 25.6% | 70.5% | 4% | 1970 |
| St. Joseph County | 227 | 49.8% | 45.4% | 4.8% | 1980 |
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 Indiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IN (230 bridges here).
- Clark County, IL · 230 bridges
- Saline County, MO · 230 bridges
- Greer County, OK · 230 bridges
- Saline County, AR · 231 bridges
Similar average build year
Nearest mean year-built outside IN (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.
All bridges (230)
CR 300 NORTH
FairOver: HURRICANE CREEK
0.20 E OF CR 350 E, Johnson, IN
Built 1994 Load: 32.7 t ADT: 1,263
CR 350 NORTH
FairOver: LITTLE SUGAR CREEK
0.15 E OF CR 625 E, Johnson, IN
Built 1991 Load: 32.7 t ADT: 431
SOUTH STREET
FairOver: YOUNGS CREEK
0.20 E OF HOME AVENUE, Johnson, IN
Built 1934 Load: 32.7 t ADT: 4,186
CR 725 EAST
FairOver: DRAINAGE DITCH
0.35 NW OF 400 S, Johnson, IN
Built 1960 Load: 32.7 t ADT: 72
MOORELAND DRIVE
FairOver: EAST GRASSY CREEK
0.02 N OF WESTBROOK DR, Johnson, IN
Built 1999 Load: 32.7 t ADT: 613
CR 575 EAST
FairOver: GUTSINGER DITCH
0.10 N OF CR 600 N, Johnson, IN
Built 1992 Load: 32.7 t ADT: 344
BERRY ROAD
FairOver: TURKEY PEN CREEK
0.10 N OF OLIVE BRANCH RD, Johnson, IN
Built 1997 Load: 32.7 t ADT: 3,927
CR 800 N (STOP 18)
FairOver: LITTLE GRASSY CREEK
0.60 E OF US 31, Johnson, IN
Built 2000 Load: 32.7 t ADT: 3,489
CR 500 WEST
FairOver: CROOKED CREEK
0.40 S OF CR 144, Johnson, IN
Built 2002 Load: 32.7 t ADT: 919
EMERSON AVENUE
FairOver: PLEASANT CREEK
0.50 S OF COUNTY LINE RD, Johnson, IN
Built 2003 Load: 32.7 t ADT: 26,836
BRIDGECREEK CROSS
FairOver: LITTLE GRASSY CREEK
0.10 S OF WORTHVILLE RD, Johnson, IN
Built 2003 Load: 32.7 t ADT: 147
TIMBERS EDGE DRIVE
FairOver: PLEASANT RUN CREEK
0.05 N OF FRY ROAD, Johnson, IN
Built 2003 Load: 32.7 t ADT: 545
CR 375 NORTH
FairOver: BANTA CREEK
0.15 E OF CR 725 W, Johnson, IN
Built 1995 Load: 32.7 t ADT: 132
CR 144
FairOver: SALEM BROOK
0.45 NW OF CR 625 W, Johnson, IN
Built 1950 Load: 32.7 t ADT: 5,329
CR 700 WEST
FairOver: INDIAN CREEK
0.10 S OF CR 700 S, Johnson, IN
Built 1970 Load: 33.0 t ADT: 222
CR 100 NORTH
FairOver: HURRICANE CREEK
0.10 W OF EASTVIEW DR, Johnson, IN
Built 1979 Load: 33.4 t ADT: 1,763
CR 100N
FairOver: I-65 NB/SB
00.92 N SR 44, Johnson, IN
Built 1971 Load: 33.7 t ADT: 1,096
CR 700 SOUTH
FairOver: BARNES CREEK
0.10 W OF CR 700 W, Johnson, IN
Built 1983 Load: 33.7 t ADT: 1,078
CR 400 NORTH
FairOver: YOUNGS CREEK
0.50 E OF CR 200 W, Johnson, IN
Built 1981 Load: 33.9 t ADT: 114
CR 500 NORTH
FairOver: LITTLE SUGAR CREEK
0.25 W OF CR 700 E, Johnson, IN
Built 1965 Load: 34.0 t ADT: 2,658
CR 325 EAST
FairOver: HURRICANE CREEK
0.20 N OF CR 750 N, Johnson, IN
Built 1978 Load: 34.2 t ADT: 520
CR 600 SOUTH
FairOver: BARNES CREEK
0.30 W OF SR 135, Johnson, IN
Built 1978 Load: 34.4 t ADT: 318
CR 100 EAST
FairOver: NINEVEH CREEK
0.01 S OF CR 700 S, Johnson, IN
Built 1970 Load: 34.4 t ADT: 3,552
CR 600 NORTH
FairOver: FISHER DITCH
1.00 E OF CR 575 E, Johnson, IN
Built 1981 Load: 34.5 t ADT: 129
CR 100 NORTH
FairOver: N BR PRONG STOTTS CR
0.30 E OF CR 575 W, Johnson, IN
Built 1981 Load: 35.1 t ADT: 174
CR 700 SOUTH
FairOver: GOOSE CREEK
0.50 E OF CR 700 W, Johnson, IN
Built 1967 Load: 35.2 t ADT: 1,028
CR 25 WEST
FairOver: BUCKHART CREEK
0.10 S OF CR 375 S, Johnson, IN
Built 1988 Load: 35.3 t ADT: 397
CR 200 NORTH
FairOver: HURRICANE CREEK
0.10 E OF CR 400 E, Johnson, IN
Built 1990 Load: 35.9 t ADT: 90
CENTERLINE ROAD
FairOver: YOUNGS CREEK
0.20 N OF SR 144, Johnson, IN
Built 1970 Load: 35.9 t ADT: 2,135
SR 37 NB
FairOver: HONEY CREEK
03.39 N SR 144, Johnson, IN
Built 2023 Load: 36.3 t ADT: 28,250
FRY ROAD
FairOver: PLEASANT RUN CREEK
0.70 W OF US 31, Johnson, IN
Built 1996 Load: 36.3 t ADT: 14,291
BUCKMOOR PARKWAY
FairOver: TURKEY PEN CREEK
0.10 W OF SR 135, Johnson, IN
Built 1987 Load: 36.3 t ADT: 426
CR 525 SOUTH
FairOver: GOOSE CREEK
0.50 W OF CR 300 W, Johnson, IN
Built 1975 Load: 36.4 t ADT: 98
MAIN STREET
FairOver: PLEASANT RUN CREEK
0.00 MAIN ST & HOWARD RD, Johnson, IN
Built 1988 Load: 36.6 t ADT: 15,881
CR 100 SOUTH
FairOver: BRANCH OF YOUNGS CR
0.60 E OF SR 44, Johnson, IN
Built 1985 Load: 36.7 t ADT: 97
CR 300 WEST
FairOver: INDIAN CREEK
0.01 S OF INDIAN CREEK RD, Johnson, IN
Built 1961 Load: 37.5 t ADT: 3,002
SR 252
FairOver: BIG BLUE RIVER
00.52 E US 31, Johnson, IN
Built 1926 Load: 37.8 t ADT: 3,784
MAIN STREET
FairOver: PLEASANT RUN CREEK
0.80 W OF US 31, Johnson, IN
Built 1990 Load: 37.8 t ADT: 15,881
CR 500 WEST
FairOver: GOOSE CREEK
1.00 S OF CR 550 S, Johnson, IN
Built 1967 Load: 37.9 t ADT: 1,651
CR 550 SOUTH
FairOver: BRANCH OF HERRIOTTS CR
0.30 W OF MAUXFERRY RD, Johnson, IN
Built 1992 Load: 37.9 t ADT: 88
US 31
FairOver: PLEASANT RUN CREEK
05.75 S I-465, Johnson, IN
Built 1991 Load: 38.2 t ADT: 33,232
CR 600 N
FairOver: I-65
06.02 N SR 44, Johnson, IN
Built 1971 Load: 38.2 t ADT: 1,577
CR 300 SOUTH
FairOver: AMITY DITCH
0.60 E OF US 31, Johnson, IN
Built 1986 Load: 38.4 t ADT: 285
STONES CROSSING RD
FairOver: HONEY CREEK
0.40 E OF MORGANTOWN RD, Johnson, IN
Built 1989 Load: 38.4 t ADT: 8,602
CR 150 NORTH
FairOver: BRANCH OF SUGAR CREEK
0.50 W OF CR 800 E, Johnson, IN
Built 1910 Load: 38.5 t ADT: 20
I-65 NB
FairOver: AMITY DITCH
02.86 S SR 44, Johnson, IN
Built 1970 Load: 38.9 t ADT: 28,018
EASTVIEW DRIVE
FairOver: HURRICANE CREEK
0.10 N OF CR 100 N, Johnson, IN
Built 1987 Load: 38.9 t ADT: 4,753
US 31 NB
FairOver: BIG BLUE RIVER
00.29 S SR 252, Johnson, IN
Built 1950 Load: 39.2 t ADT: 6,849
US 31 SB
FairOver: BIG BLUE RIVER
00.29 S SR 252, Johnson, IN
Built 1943 Load: 39.2 t ADT: 7,059
CR 260 NORTH
FairOver: BREWER DITCH
0.30 E OF CENTER, Johnson, IN
Built 1982 Load: 40.9 t ADT: 1,701
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.