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Bridge conditions in Hardin County, Illinois

61 inventoried bridges · 4 rated poor · 2025 National Bridge Inventory

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

Hardin County tracks close to typical: 4 of its 61 inventoried bridges (6.6%) are rated poor, against a national rate of about 7%.

4 of the 61 bridges in Hardin County, Illinois, are rated in poor condition (6.6%) in the 2025 National Bridge Inventory, as of August 20, 2026.
35 bridges (57.4%) are rated good and 22 (36.1%) fair.
The median Hardin County bridge was built in 1979.
The busiest poor-rated bridge is Ill 146 over Hosick Creek (built 1953), carrying about 1,500 vehicles a day.

Good 57.4% · Fair 36.1% · Poor 6.6% of 61 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
Ill 146 over Hosick Creek	1953	1,500	Poor
Fas 2934-fh 141 over Big Creek	1968	100	Poor
Tr 85 over Branch of Big Creek	1968	25	Poor
Market Street over Unnamed Stream	1900	10	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Ill 146 over Big Creek	2004	1,900	Good
Ill 34 & Ill 146 over Threemile Creek	2009	1,550	Fair
Ill 146 over Hosick Creek	1953	1,500	Poor
Ill 146 over Peters Creek	2013	1,500	Good
Ill 146 over Stream	1954	1,500	Good
Ill 34 over Rose Creek	1924	1,400	Fair
Ill 34 over Pinhook Creek	1924	1,200	Fair
Ill 34 over Hicks Branch	1924	1,200	Fair
Ill 34 over Hobbs Creek	1923	1,200	Fair
Ill. 34 over Hicks Branch	1978	1,200	Good

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Illinois: Illinois 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.