County profile · official public datasets

Leavenworth County, KS

241 public highway bridges tracked in the FHWA National Bridge Inventory: 61% rated Good, 36.1% Fair, 2.9% Poor.

241
Public bridges: 61%
Good condition: 2.9%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Leavenworth County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 35%
lowest Poor share in state: 2.9%
Poor-condition share: 241
public highway bridges: 1981
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.

Leavenworth County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Leavenworth County ranks #36 of 104 Kansas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.9%). Leavenworth County, Kansas contains 241 public highway bridges. Roughly 61% are rated “Good,” 36.1% “Fair,” and 2.9% “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.

Total bridges

241

Public highway bridges in Leavenworth County

Good condition

61%

147 of 241 rated 7-9

Fair condition

36.1%

87 of 241 rated 5-6

Poor condition

2.9%

7 of 241 rated 4 or below

In-state Poor-share rank

#36 of 104

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

Condition distribution

Share of 241 NBI-tracked bridges by lowest applicable component rating.

Good

61% (147)

Fair

36.1% (87)

Poor

2.9% (7)

Leavenworth County's Poor-condition bridges carry 8,951 vehicle crossings a day

That is 1.5% of the county's reported daily bridge traffic on 2.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,279 crossings a day against 2,689 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 241 of 241 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

31.5% of Leavenworth County's bridges have passed the 50-year mark

76 of the 241 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 61% 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 20.8% of the county's Poor-condition bridge traffic

ST-91 EVANS ROAD over TRIB. TO TONGANOXIE CK., built 1986, carries 1,860 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 7-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 8,951 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

2
1920s

9
1930s

9
1940s

2
1950s

27
1960s

16
1970s

30
1980s

58
1990s

30
2000s

22
2010s

26
2020s

10

What this shows Construction peaked in the 1980s, when 58 of the county's bridges still in the inventory were built, which is 24.1% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1981, 9 years newer than the Kansas average of 1972.

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

The 5 Kansas counties nearest Leavenworth County in number of bridges, with their condition splits. Its 2.9% Poor share is the 3rd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1971 is 10 years newer.

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

Bridge inventory size and condition shares for Leavenworth County and the 5 Kansas counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Norton County	244	53.7%	44.3%	2%	1980
Osborne County	244	52.5%	40.2%	7.4%	1967
Wabaunsee County	242	36.8%	52.9%	10.3%	1963
Barber County	241	44.8%	53.9%	1.2%	1974
Neosho County	241	60.2%	29.5%	10.4%	1969
Leavenworth County (this page)	241	61%	36.1%	2.9%	1981

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 Leavenworth 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 Leavenworth County, both outside Kansas so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside KS (241 bridges here).

Sumter County, AL · 241 bridges
Hardin County, IA · 241 bridges
Iowa County, IA · 241 bridges
Ingham County, MI · 241 bridges

Similar average build year

Nearest mean year-built outside KS (1981 here).

Franklin County, OH · avg 1981 · 922 bridges
Greenville County, SC · avg 1981 · 635 bridges
Montgomery County, OH · avg 1981 · 632 bridges
McLean County, IL · avg 1981 · 624 bridges

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

All 241 Good 147 Fair 87 Poor 7

Good-condition bridges (147)

Sort:

Leavenworth County Bridge Snapshot

Condition distribution

Leavenworth County's Poor-condition bridges carry 8,951 vehicle crossings a day

31.5% of Leavenworth County's bridges have passed the 50-year mark

One structure carries 20.8% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (147)

R-3 DEHOFF ROAD

R-75 ALEXANDER RD

I-70 HWY EB (KTA)

I-70 HWY WB (KTA)

K-24 187TH STREET

K-10 187TH STREET

HP-47 199th St.

FAU 3515 A.95-2.45

SH-60 LORING DR

HP-17 LOCAL RD.

HP-10 Stranger Rd.

CO HWY 5 D.39-1.45

FAU 3530 A.98-2.34

W LV TRW D.45-1.45

SHERMAN AVE

T-54 STATE AVENUE

F-53 KANSAS AVE.

T-77 TONGANOXIE

E-34 ROE ROAD

ST-49 198TH STREET

HP-40 183rd St.

RS1847 GARCLN RD

A-17 LIMIT ROAD

188TH ST

K-5 HWY

CHEROKEE B.09-2.80

A-20 251ST STREET

FAU 3523 B.13-2.96

LB-3 McIntyre Rd.

RS0389 DESOTO RD

US73 HWY SB LANE

E-20 THIRD STREET

Local(Pleasant St)

FAU 3533 B.15-3.42

R-5 DEHOFF ROAD

T-42 MITCHELL Rd.

E-58 MILLWOOD RD

K-192 HIGHWAY

HP-19 MCINTYRE RD

F-46 166TH STREET

K-5 HIGHWAY

Local (Church St)

I-70 HWY EB (KTA)

E-45 243RD STREET

F-43 PARALLEL

LB-7 Main Entrance

E-48 255TH STREET

K-32 HWY

ST-33 TONGAN. RD.

ST-52 206TH STREET

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