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Thornburg Road over Trib E Fork Little Miami

Clinton County, Ohio · rated Good in the 2025 National Bridge Inventory

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

Thornburg Road over Trib E Fork Little Miami in Clinton County, Ohio, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2006, making it 19 years old at the 2025 inventory.
It carries about 172 vehicles a day (traffic count year 2017).
Its listed owner is the county highway agency.
It is one of 161 of the 207 inventoried bridges in Clinton County rated good (77.8%); 1 (0.5%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 27 ft
Location	.6 Mi South of SR73
NBI structure number	1440047
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Ohio department of transportation.

Bridge	Built	Vehicles/day	Condition
SB Ir-71 over Anderson Fork	2024	43,000	Good
NB Ir-71 over Anderson Fork	2024	43,000	Good
SB Ir 71 over Grassy Run	2024	43,000	Good
NB Ir-71 over Grassy Run	2024	43,000	Good
US 22 over Anderson Fork	1989	10,980	Good
US 68 over Todd Fork	1990	10,607	Good