County profile · official public datasets

Kingman County, KS

391 public highway bridges tracked in the FHWA National Bridge Inventory: 48.3% rated Good, 45.8% Fair, 5.9% Poor.

391
Public bridges: 48.3%
Good condition: 5.9%
Poor condition

The verdict

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

Kingman County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

66th
of 104 on Poor share: 5.9%
Poor-condition share: 391
public highway bridges: 1976
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.

Kingman County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Kingman County ranks #66 of 104 Kansas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.9%). Kingman County, Kansas contains 391 public highway bridges. Roughly 48.3% are rated “Good,” 45.8% “Fair,” and 5.9% “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

391

Public highway bridges in Kingman County

Good condition

48.3%

189 of 391 rated 7-9

Fair condition

45.8%

179 of 391 rated 5-6

Poor condition

5.9%

23 of 391 rated 4 or below

In-state Poor-share rank

#66 of 104

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

Condition distribution

Share of 391 NBI-tracked bridges by lowest applicable component rating.

Good

48.3% (189)

Fair

45.8% (179)

Poor

5.9% (23)

Kingman County's Poor-condition bridges carry 4,105 vehicle crossings a day

That is 2.2% of the county's reported daily bridge traffic on 5.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 178 crossings a day against 777 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 390 of 391 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

44.5% of Kingman County's bridges have passed the 50-year mark

174 of the 391 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 48.3% 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 81.5% of the county's Poor-condition bridge traffic

US54/US400 HWY WB over K14 HWY, built 1975, carries 3,345 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 23-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 4,105 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

2
1910s

1
1920s

14
1930s

8
1940s

48
1950s

27
1960s

25
1970s

60
1980s

107
1990s

29
2000s

35
2010s

28
2020s

7

What this shows Construction peaked in the 1980s, when 107 of the county's bridges still in the inventory were built, which is 27.4% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1976) matches the Kansas average (1972).

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

The 5 Kansas counties nearest Kingman County in number of bridges, with their condition splits. Its 5.9% Poor share is the 3rd-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1971 is 5 years newer.

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

Bridge inventory size and condition shares for Kingman County and the 5 Kansas counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Marshall County	402	49.8%	39.6%	10.7%	1974
Kingman County (this page)	391	48.3%	45.8%	5.9%	1976
Dickinson County	375	47.7%	47.2%	5.1%	1974
Harper County	372	25%	65.3%	9.7%	1965
Harvey County	372	57.3%	35.5%	7.3%	1971
Saline County	369	68.6%	29.5%	1.9%	1971

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

Similar inventory size

Nearest county inventories outside KS (391 bridges here).

Arapahoe County, CO · 391 bridges
Lee County, FL · 391 bridges
Wayne County, OH · 391 bridges
DeKalb County, GA · 392 bridges

Similar average build year

Nearest mean year-built outside KS (1976 here).

Marion County, IN · avg 1976 · 958 bridges
Mohave County, AZ · avg 1976 · 641 bridges
Comanche County, OK · avg 1976 · 593 bridges
Prince George's County, MD · avg 1976 · 576 bridges

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

All 391 Good 189 Fair 179 Poor 23

Good-condition bridges (189)

Sort:

Kingman County Bridge Snapshot

Condition distribution

Kingman County's Poor-condition bridges carry 4,105 vehicle crossings a day

44.5% of Kingman County's bridges have passed the 50-year mark

One structure carries 81.5% of the county's Poor-condition bridge traffic

How Kingman 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 (189)

EB US54/US400 HWY

AR 735

US54/US400 HWY

LOCAL ROAD

LOCAL ROAD

AR 870

AR 870

AR 870

SW 80 ST. L.8-15.0

SW 50 ST. G.0-12.0

700 East G Street

K-42 HWY

K-42 HWY

K-42 HWY

SE 80 A. BB.0-10.0

EB US54/US400 HWY

RS 303 SE 70 AVE

K42 HWY

RS 360 NW 110 AVE

K-14 HIGHWAY

WB US54/US400 HWY

EB US54/US400 HWY

K42 HWY

RS 296 SW 90 AVE

WB US54/US400 HWY

US54/US400 HWY EB

RS 303 SE 100 AVE

K-42 HWY

US54/US400 HWY

K-42 HWY

K-14

SE 110 S. W.7-18.0

K-14 HIGHWAY

US54/US400 HWY WB

US54/US400 HWY

RS 296 SW90 AVE

US54/US400 HWY

US54/US400 HWY

RS 989 NE 160 AVE

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