Total bridges
326
Public highway bridges in Montgomery County
County profile · official public datasets
Montgomery County, KS
326 public highway bridges tracked in the FHWA National Bridge Inventory: 32.2% rated Good, 62.3% Fair, 5.5% Poor.
- 326
- Public bridges
- 32.2%
- Good condition
- 5.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Montgomery County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 64th
- of 104 on Poor share
- 5.5%
- Poor-condition share
- 326
- public highway bridges
- 1969
- 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.
Montgomery County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Montgomery County ranks #64 of 104 Kansas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.5%). Montgomery County, Kansas contains 326 public highway bridges. Roughly 32.2% are rated “Good,” 62.3% “Fair,” and 5.5% “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
32.2%
105 of 326 rated 7-9
Fair condition
62.3%
203 of 326 rated 5-6
Poor condition
5.5%
18 of 326 rated 4 or below
In-state Poor-share rank
#64 of 104
Among Kansas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 326 NBI-tracked bridges by lowest applicable component rating.
Good 32.2% (105)
Fair 62.3% (203)
Poor 5.5% (18)
Montgomery County's Poor-condition bridges carry 4,656 vehicle crossings a day
That is 1.4% of the county's reported daily bridge traffic on 5.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 259 crossings a day against 2,029 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 325 of 326 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
49.4% of Montgomery County's bridges have passed the 50-year mark
161 of the 326 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 32.2% 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 31% of the county's Poor-condition bridge traffic
2000 RD Mile 15 over TRIB. TO ONION CREEK, built 1940, carries 1,442 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 18-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 4,656 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Montgomery County's bridges were built
326 bridges with a recorded construction year, grouped by decade
- 1910s 4
1910–1919
4 bridges
- 1920s 14
1920–1929
14 bridges
- 1930s
1930–1939
57 bridges
- 1940s 19
1940–1949
19 bridges
- 1950s
1950–1959
23 bridges
- 1960s
1960–1969
23 bridges
- 1970s
1970–1979
50 bridges
- 1980s
1980–1989
53 bridges
- 1990s
1990–1999
37 bridges
- 2000s 16
2000–2009
16 bridges
- 2010s
2010–2019
24 bridges
- 2020s 6
2020–2029
6 bridges
What this shows Construction peaked in the 1930s, when 57 of the county's bridges still in the inventory were built, which is 17.5% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year (1969) matches the Kansas average (1972).
How Montgomery County compares with Kansas's closest counties by inventory size
The 5 Kansas counties nearest Montgomery County in number of bridges, with their condition splits. Its 5.5% Poor share is the 5th-lowest of these 6. Its average build year of 1969 against a peer-group mean of 1969 is in line with the group.
Showing the 5 closest of 103 Kansas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Washington County | 335 | 54.9% | 41.2% | 3.9% | 1975 |
| Franklin County | 332 | 55.1% | 40.7% | 4.2% | 1972 |
| Miami County | 326 | 64.7% | 31.9% | 3.4% | 1974 |
| Montgomery County (this page) | 326 | 32.2% | 62.3% | 5.5% | 1969 |
| Marion County | 324 | 39.2% | 51.2% | 9.6% | 1959 |
| Cherokee County | 317 | 42.6% | 53% | 4.4% | 1967 |
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 Montgomery 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 Montgomery County, both outside Kansas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside KS (326 bridges here).
- Merrimack County, NH · 326 bridges
- Washington County, OR · 326 bridges
- St. Clair County, MI · 327 bridges
- Henry County, IL · 328 bridges
Similar average build year
Nearest mean year-built outside KS (1969 here).
- Cook County, IL · avg 1969 · 1,721 bridges
- Fresno County, CA · avg 1969 · 916 bridges
- Cuyahoga County, OH · avg 1969 · 871 bridges
- Ventura County, CA · avg 1969 · 501 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (18)
4500 RD Mile 21
PoorOver: IRISH CREEK
2.8S 3.0E OF SYCAMORE, Montgomery, KS
Built 1970 Load: 5.7 t ADT: 40
6000 RD Mile 13
PoorOver: STREAM
1.0N 2.0W OF SYCAMORE, Montgomery, KS
Built 1940 Load: 6.7 t ADT: 50
4700 RD Mile 27
PoorOver: SALT CREEK
3.2N 4.0E OF SYCAMORE, Montgomery, KS
Built 1930 Load: 10.1 t ADT: 20
1800 RD Mile 23
PoorOver: PUMPKIN CREEK
1.0E OF VIDETTA SPUR, Montgomery, KS
Built 1919 Load: 12.0 t ADT: 500
1800 RD Mile 21
PoorOver: VERDIGRIS RIVER
0.4E OF COFFEYVILLE, Montgomery, KS
Built 1926 Load: 15.1 t ADT: 1,000
2500 RD Mile 12
PoorOver: STREAM
1.7W 0.5N OF BOLTON, Montgomery, KS
Built 1910 Load: 16.2 t ADT: 20
5625 RD Mile 21
PoorOver: DRUM CREEK
3.3N 1.0W OF CHERRYVALE, Montgomery, KS
Built 1926 Load: 16.2 t ADT: 20
4400 RD Mile 16
PoorOver: VERDIGRIS RIVER
1.0S 3.0E OF INDEPENDENCE, Montgomery, KS
Built 1926 Load: 17.3 t ADT: 250
1800 RD Mile 23
PoorOver: PUMPKIN CREEK
0.8S 0.1E INT US169-US166, Montgomery, KS
Built 1919 Load: 18.9 t ADT: 500
3425 RD Mile 21
PoorOver: BIG HILL CREEK
0.3E OF LIBERTY, Montgomery, KS
Built 1956 Load: 22.9 t ADT: 516
2000 RD Mile 15
PoorOver: TRIB. TO ONION CREEK
0.3S 0.8E OF DEARING, Montgomery, KS
Built 1940 Load: 24.3 t ADT: 1,442
3300 RD Mile 26
PoorOver: SYCAMORE CREEK
2.8N 3.0W OF SYCAMORE, Montgomery, KS
Built 1920 Load: 24.3 t ADT: 58
2500 RD Mile 13
PoorOver: ONION CREEK TRIB.
1.5N 1.7W OF BOLTON, Montgomery, KS
Built 1930 Load: 24.3 t ADT: 60
4300 RD Mile 3
PoorOver: ONION CREEK
0.5W 1.0S OF COFFEYVILLE, Montgomery, KS
Built 1983 Load: 25.1 t ADT: 50
1500 RD Mile 25
PoorOver: TRIB. TO ELK RIVER
4.0N 1.5W INT US160-K39, Montgomery, KS
Built 1981 Load: 28.6 t ADT: 30
5700 RD Mile 25
PoorOver: DRUM CREEK
1.37 N. OF US-160, Montgomery, KS
Built 1922 Load: 29.0 t ADT: 50
6450 RD Mile 10
PoorOver: SYCAMORE CREEK
1.5N 4.5W OF BRICKTON, Montgomery, KS
Built 1940 Load: 40.8 t ADT: 20
4700 RD Mile 9
PoorOver: STREAM
2.5N OF COFFEYVILLE, Montgomery, KS
Built 1992 Load: 59.1 t ADT: 30
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.