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Tr 308(BRIGGS Rd) over Friends Creek Ditch

Macon County, Illinois · rated Fair in the 2025 National Bridge Inventory

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

Tr 308(BRIGGS Rd) over Friends Creek Ditch in Macon County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1984, making it 41 years old at the 2025 inventory.
It carries about 25 vehicles a day (traffic count year 2020).
Its listed owner is a town or township highway agency.
It is one of 207 of the 346 inventoried bridges in Macon County rated fair (59.8%); 54 (15.6%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 75 ft
Location	5 Mi NE of Argenta
NBI structure number	058327900000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Fap 322(US 51) over I-72	2011	24,400	Fair
US 51 NB (fap 710) over Lake Decatur	1962	22,400	Fair
US 51 SB (fap 710) over Lake Decatur	1971	22,400	Fair
US 36(FAP 320) over Lake Shore Dr(u 7390	1954	20,900	Poor
US 36(FAP 320) over Lake Decatur	1955	20,900	Fair
Fap 320(IL 121) over NS RR	1991	18,900	Fair