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Big Hill Road over Running Slough Trib

Gallatin County, Illinois · rated Good in the 2025 National Bridge Inventory

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

Big Hill Road over Running Slough Trib in Gallatin County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 2008, making it 17 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2023).
Its listed owner is a town or township highway agency.
It is one of 65 of the 82 inventoried bridges in Gallatin County rated good (79.3%); 6 (7.3%) 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	Concrete stringer or multi-beam girder
Length	about 41 ft
Location	3MI N Old Shawneetow
NBI structure number	030312700000000
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Ill 13 over North Fork Saline R	1964	3,700	Poor
Ill 13 over Stream	1968	3,700	Good
Ill 13 over Cypress Branch	1965	2,700	Fair
Ill 13 over Cypress Ditch	1965	2,700	Fair
Ill 13 over Stream	1955	2,650	Fair
Ill 13 over Market St.	2004	2,500	Good