County profile · official public datasets

Johnson County, KS

781 public highway bridges tracked in the FHWA National Bridge Inventory: 75% rated Good, 23.6% Fair, 1.4% Poor.

781
Public bridges
75%
Good condition
1.4%
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 21%
lowest Poor share in state
1.4%
Poor-condition share
781
public highway bridges
1992
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 #22 of 104 Kansas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.4%). Johnson County, Kansas contains 781 public highway bridges. Roughly 75% are rated “Good,” 23.6% “Fair,” and 1.4% “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.

Total bridges

781

Public highway bridges in Johnson County

Good condition

75%

586 of 781 rated 7-9

Fair condition

23.6%

184 of 781 rated 5-6

Poor condition

1.4%

11 of 781 rated 4 or below

In-state Poor-share rank

#22 of 104

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

Condition distribution

Share of 781 NBI-tracked bridges by lowest applicable component rating.

Good
75% (586)
Fair
23.6% (184)
Poor
1.4% (11)

Johnson County's Poor-condition bridges carry 61,312 vehicle crossings a day

That is 0.7% of the county's reported daily bridge traffic on 1.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 5,574 crossings a day against 11,009 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 781 of 781 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

18.4% of Johnson County's bridges have passed the 50-year mark

144 of the 781 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 75% 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 39.1% of the county's Poor-condition bridge traffic

COLLEGE BLVD over INDIAN CK, built 1976, carries 24,000 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 11-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 61,312 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

781 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 186 of the county's bridges still in the inventory were built, which is 23.8% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1992, 20 years newer than the Kansas average of 1972.

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

How Johnson County compares with Kansas's closest counties by inventory size

The 5 Kansas counties nearest Johnson County in number of bridges, with their condition splits. Its 1.4% Poor share is the 2nd-lowest of these 6. Its average build year of 1992 against a peer-group mean of 1977 is 15 years newer.

Showing the 5 closest of 103 Kansas counties eligible for comparison.

Bridge inventory size and condition shares for Johnson County and the 5 Kansas counties closest to it in inventory size
County Bridges Poor
Johnson County (this page) 781 1.4%
Sumner County 659 2.6%
Butler County 591 6.1%
McPherson County 586 0.7%
Reno County 573 6.1%
Shawnee County 563 3%

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 Kansas so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside KS (781 bridges here).

Similar average build year

Nearest mean year-built outside KS (1992 here).

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

All 781 Good 586 Fair 184 Poor 11

Good-condition bridges (586)

RAMP QUIVIRA-69S

Good

Over: RAMP 435E-69S

RAMP QUIVIRA TO 435E-69S, Johnson, KS

Built 2013 Load: 32.4 t ADT: 13,720

159TH ST. F.4-7.0

Good

Over: KILL CREEK

1.6W OF GARDNER RD., Johnson, KS

Built 1966 Load: 32.7 t ADT: 600

GARDNER RD

Good

Over: TRIB TO BIG BULL CREEK

1.3 S OF I-35, Johnson, KS

Built 2008 Load: 32.7 t ADT: 3,000

LONE ELM RD. #94

Good

Over: CEDAR CREEK TRIB.

0.17 N OF 167TH ST., Johnson, KS

Built 2002 Load: 32.7 t ADT: 7,830

LONE ELM RD #95

Good

Over: CEDAR CREEK TRIB.

0.23 N OF 167TH ST., Johnson, KS

Built 2002 Load: 32.7 t ADT: 7,830

207TH ST. N.55-1.0

Good

Over: CREEK

1 MI E. OF SPRING HILL, Johnson, KS

Built 2001 Load: 32.7 t ADT: 1,800

167TH ST H.1-6.0

Good

Over: GARDNER LAKE TRIBUTARY

0.05 E OF CENTER ST., Johnson, KS

Built 2004 Load: 32.7 t ADT: 4,820

83RD STREET

Good

Over: DYKES BRANCH

200 FT E OF WENONGA ROAD, Johnson, KS

Built 1964 Load: 32.7 t ADT: 7,610

STATE LINE RD

Good

Over: PARKING LOT ACCESS RD

430ft S of 86th TERR, Johnson, KS

Built 1970 Load: 32.7 t ADT: 27,375

Switzer Rd.

Good

Over: TURKEY CREEK TRIBUTARY

100FT S OF 70TH ST, Johnson, KS

Built 2001 Load: 32.7 t ADT: 10,800

ROE AVE.

Good

Over: ROCK CREEK

200 FT. S. OF JOHNSON DR., Johnson, KS

Built 2007 Load: 32.7 t ADT: 11,170

DENNIS AVENUE #23

Good

Over: LITTLE CEDAR CREEK TRIB.

0.4E OF PARKER, Johnson, KS

Built 1998 Load: 32.7 t ADT: 4,085

VALLEY PARKWAY

Good

Over: CEDAR CREEK TRIBUTARY

.60 MI E OF CEDAR CR PKWY, Johnson, KS

Built 1996 Load: 32.7 t ADT: 1,000

PARK STREET #14

Good

Over: MILL CREEK

AT PARK AND HARRISON, Johnson, KS

Built 1978 Load: 32.7 t ADT: 2,000

EB 119TH ST #75

Good

Over: BNSF RR AND KC ROAD

0.1 MI WEST OF I-35, Johnson, KS

Built 1991 Load: 32.7 t ADT: 25,400

HAROLD STREET #3

Good

Over: MILL CREEK

0.2W OF WOODLAND, Johnson, KS

Built 1978 Load: 32.7 t ADT: 7,185

KANSAS CITY RD #10

Good

Over: MILL CREEK TRIB.

0.2N.E. OF NELSON, Johnson, KS

Built 1979 Load: 32.7 t ADT: 7,405

MUR-LEN ROAD #17

Good

Over: INDIAN CREEK

0.3S OF SANTA FE, Johnson, KS

Built 1998 Load: 32.7 t ADT: 23,450

BLUE VALLEY PKWY

Good

Over: TOMAHAWK CK TRIB

250 S. OF 121ST ST., Johnson, KS

Built 1966 Load: 32.7 t ADT: 26,400

99TH ST

Good

Over: INDIAN CK TRIB NO 3

200 E OF MARTY, Johnson, KS

Built 1961 Load: 32.7 t ADT: 2,400

LOWELL AVE.

Good

Over: INDIAN CK TRIB NO 4

0.30 MI N OF 103RD ST., Johnson, KS

Built 1972 Load: 32.7 t ADT: 3,300

75TH STREET & NALL

Good

Over: BRUSH CREEK

INTERSEC. OF 75TH & NALL, Johnson, KS

Built 1994 Load: 32.7 t ADT: 25,930

LACKMAN RD.

Good

Over: LITTLE MILL CREEK

0.04S OF MIDLAND DRIVE, Johnson, KS

Built 1990 Load: 32.7 t ADT: 8,015

JOHNSON DR.

Good

Over: MILL CREEK TRIB.

0.3 MI W OF I-435, Johnson, KS

Built 1987 Load: 32.7 t ADT: 7,270

BLACKFISH PKWY.

Good

Over: LITTLE MILL CK TRIB

0.2 M. W. OF PFLUMM RD., Johnson, KS

Built 1993 Load: 32.7 t ADT: 8,040

CORLISS G.5-16.6

Good

Over: CEDAR CREEK TRIB.

1.1E 0.2N OF DESOTO, Johnson, KS

Built 1992 Load: 32.7 t ADT: 1

167TH ST F.8-6.0

Good

Over: KILL CREEK

0.2MI WEST OF WAVERLY, Johnson, KS

Built 2006 Load: 32.7 t ADT: 4,430

85TH TERRACE

Good

Over: TRIB. TO DYKES BRANCH

85TH TERR AT HIGH DRIVE, Johnson, KS

Built 1994 Load: 32.7 t ADT: 2,500

133RD STREET

Good

Over: Storm Drainage

At High Dr., Johnson, KS

Built 2001 Load: 32.7 t ADT: 2,500

84th St.

Good

Over: Storm Drainage

At Stateline, Johnson, KS

Built 2000 Load: 32.7 t ADT: 100

Juniper Street

Good

Over: Storm Drainage

550 ft N of 143rd St, Johnson, KS

Built 2007 Load: 32.7 t ADT: 500

86th TERRACE

Good

Over: DYKES BRANCH TRIB.

86th TERR E of LEE BLVD, Johnson, KS

Built 1990 Load: 32.7 t ADT: 60

KNOX AVE

Good

Over: DRAINAGE DITCH

700FT NORTH OF W 53RD ST, Johnson, KS

Built 2014 Load: 32.7 t ADT: 250

70th Terrace

Good

Over: Meyer Creek

160 S. of 70th Street, Johnson, KS

Built 2015 Load: 32.7 t ADT: 1,000

NALL AVE.

Good

Over: ROCK CREEK

40 FT. N. OF MARTWAY, Johnson, KS

Built 2006 Load: 32.7 t ADT: 14,016

MARTWAY

Good

Over: ROCK CREEK

400 FT. E. OF NALL AVE., Johnson, KS

Built 2006 Load: 32.7 t ADT: 5,000

ROELAND DR.

Good

Over: ROCK CREEK

100 FT. S. OF MARTWAY, Johnson, KS

Built 2008 Load: 32.7 t ADT: 5,600

JOHNSON DR.

Good

Over: COOPER CREEK

INT OF JOHNSON & ROELAND, Johnson, KS

Built 2007 Load: 32.7 t ADT: 13,095

COLLEGE WAY #20

Good

Over: INDIAN CREEK

0.2E OF CLAIRBORNE, Johnson, KS

Built 1998 Load: 32.7 t ADT: 1,280

146TH. STREET #27

Good

Over: INDIAN CREEK TRIBUTARY

0.2E OF MUR-LEN, Johnson, KS

Built 1994 Load: 32.7 t ADT: 800

LOULA STREET #30

Good

Over: MILL CREEK

0.1E OF WATER ST., Johnson, KS

Built 2000 Load: 32.7 t ADT: 3,920

RIDGEVIEW ROAD #34

Good

Over: MILL CREEK

0.2S OF 111TH. STREET, Johnson, KS

Built 1984 Load: 32.7 t ADT: 16,055

119TH ST. #35

Good

Over: CEDAR CREEK

1.9 MI W OF K-7, Johnson, KS

Built 1982 Load: 32.7 t ADT: 50

NORTHGATE #43

Good

Over: MILL CREEK

0.1N OF HAROLD ST., Johnson, KS

Built 1987 Load: 32.7 t ADT: 11,775

BLACKBOB RD. #45

Good

Over: TRIB. TO INDIAN CREEK

0.3N OF 127TH. ST., Johnson, KS

Built 1988 Load: 32.7 t ADT: 23,215

CEDAR CRK PKY #47

Good

Over: CEDAR CREEK TRIBUTARY

0.4S OF K-10, Johnson, KS

Built 1965 Load: 32.7 t ADT: 2,855

119TH ST #48

Good

Over: LITTLE CEDAR CREEK

1.5 MI W OF K-7, Johnson, KS

Built 1982 Load: 32.7 t ADT: 50

MUR-LEN RD. #55

Good

Over: TRIB. TO INDIAN CREEK

0.2N OF SANTA FE, Johnson, KS

Built 1996 Load: 32.7 t ADT: 22,955

NELSON RD. #60

Good

Over: MILL CREEK TRIB.

0.4 S OF NORTHGATE, Johnson, KS

Built 1998 Load: 32.7 t ADT: 2,420

CEDAR ST. #62

Good

Over: MILL CREEK TRIB.

0.3 S OF 135TH ST., Johnson, KS

Built 2000 Load: 32.7 t ADT: 700

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

Related

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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.