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Bridge conditions in Allen County, Kansas

227 inventoried bridges · 25 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
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.

Every bridge in Allen County → - all 227, busiest first, each with its own condition record.

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.