Bridge conditions in Allen County, Kansas
227 inventoried bridges · 25 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 227 Allen County bridges in the federal inventory, 25 carry a poor rating. That 11.0% share is roughly 2x the national average.
- 25 of the 227 bridges in Allen County, Kansas, are rated in poor condition (11.0%) in the 2025 National Bridge Inventory, as of .
- 103 bridges (45.4%) are rated good and 99 (43.6%) fair.
- The median Allen County bridge was built in 1957.
- The busiest poor-rated bridge is Rs 4 over Branch of Deer Creek (built 1935), carrying about 300 vehicles a day.
Good 45.4% · Fair 43.6% · Poor 11.0% of 227 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Rs 4 over Branch of Deer Creek | 1935 | 300 | Poor |
| Walnut Street over Coon Creek | 1930 | 250 | Poor |
| Sycamore Street over Coon Creek | 1930 | 150 | Poor |
| Buckeye Street over Coon Creek | 1910 | 150 | Poor |
| Rs 1132 over Trib. to Neosho River | 1930 | 106 | Poor |
| Rs 1151 over Big Creek | 1930 | 99 | Poor |
| Rs 1151 over Branch of Marmaton River | 1935 | 99 | Poor |
| Rs 1158 over North Fork Little Osage | 1940 | 61 | Poor |
| Local Rd 17.5-h.0 over Stream | 1930 | 60 | Poor |
| 4600 St. 23.0-C.8 over Stream | 1930 | 60 | Poor |
| Local Rd 16.8-j.0 over Elm Creek | 1930 | 50 | Poor |
| 3600 St. 18.0-I.3 over Elm Creek | 1940 | 50 | Poor |
| Utah Rd 18.2-C.0 over Stream | 1930 | 50 | Poor |
| Local Rd 21.1-i.0 over Marmaton River | 1940 | 50 | Poor |
| Minor Col 24.9-e.0 over Stream | 1930 | 50 | Poor |
| Douglas Street over Coon Creek | 1930 | 50 | Poor |
| 200 Rd 1.0-Q.1 over Stream | 1930 | 40 | Poor |
| 3200 St. 16.0-O.4 over Stream | 1940 | 40 | Poor |
| 3800 St. 19.0-U.7 over Stream | 1940 | 40 | Poor |
| Local Rd 1.8-j.0 over Stream | 1940 | 30 | Poor |
| 400 St. 2.0-K.5 over Stream | 1940 | 30 | Poor |
| 1600 St. 8.0-P.8 over Stream Lwc | 1930 | 30 | Poor |
| 3200 St 16.0-J.7 over Elm Creek | 1930 | 30 | Poor |
| 4800 St. 24.0-E.7 over Stream | 1930 | 30 | Poor |
| Local Rd 20.4-t.0 over Stream Lwc | 1930 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US54 Hwy over Rock Creek | 1969 | 6,854 | Good |
| US-54 Hwy over Rock Creek Overflow | 1998 | 6,854 | Good |
| Old US169 K57 Hwy over Neosho River Drainage | 2002 | 5,500 | Good |
| Old US169 K57 Hwy over Elm Creek | 1948 | 5,500 | Good |
| Old US169 K57 Hwy over Deer Creek Drainage | 1930 | 5,235 | Fair |
| N. Washington Ave. over Coon Creek | 1988 | 5,000 | Fair |
| Old US169 K57 Hwy over Deer Creek | 1962 | 4,890 | Fair |
| US169 Hwy over Coal Creek | 1980 | 4,391 | Good |
| U-169 Hwy over Elm Creek | 1980 | 4,371 | Good |
| U-169 Hwy over Rock Creek | 1981 | 4,371 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Kansas: Kansas bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.