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Bridge conditions in Logan County, Ohio

283 inventoried bridges · 3 rated poor · 2025 National Bridge Inventory

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

Logan County tracks close to typical: 3 of its 283 inventoried bridges (1.1%) are rated poor, against a national rate of about 7%.

3 of the 283 bridges in Logan County, Ohio, are rated in poor condition (1.1%) in the 2025 National Bridge Inventory, as of August 20, 2026.
219 bridges (77.4%) are rated good and 61 (21.6%) fair.
The median Logan County bridge was built in 1989.
The busiest poor-rated bridge is CR 21B over Miami River (built 1882), carrying about 816 vehicles a day.

Good 77.4% · Fair 21.6% · Poor 1.1% of 283 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
CR 21B over Miami River	1882	816	Poor
CR 101 over Branch So Fork Miami Riv	1934	206	Poor
Tr 30 over Stony Creek	1922	150	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Usr 33 over Otter Creek	1996	20,551	Good
Usr 33 over Van Hyning Ditch #750	1996	20,234	Fair
Usr 33 over Abandoned RR	1960	11,483	Fair
SR-47 over Penn Central RR	1970	10,497	Fair
Usr 33 over CR 5 & Fish Pond Channel	1963	10,117	Good
Usr 33 over Cr-5 & Fish Pond Channel	1993	10,117	Good
Usr 33 over Mad River	1963	10,117	Good
Usr 33 over Mad River	1993	10,117	Fair
Usr 68 over Mckees Creek	1993	8,990	Good
Usr 33 over Slough Ditch	1946	8,711	Fair

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

All of Ohio: Ohio 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.