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Ill 127 over Mid Trib Flat Branch

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

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

Ill 127 over Mid Trib Flat Branch in Clinton County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1937, making it 88 years old at the 2025 inventory.
It carries about 3,250 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 71 of the 190 inventoried bridges in Clinton County rated fair (37.4%); 13 (6.8%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 22 ft
Location	2.8 M S of Bond Co L
NBI structure number	014200500000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Fai 64 over Trib to Queens Lake	1973	31,000	Good
Fai 64 EB over Sugar Ck Overflow	1971	15,500	Fair
Fai 64 WB over Sugar Ck Overflow	1971	15,500	Good
Fai 64 EB over Sugar Creek	1970	15,500	Fair
Fai 64 WB over Sugar Creek	1970	15,500	Good
Fai 64 EB over Sycamore Drainage Dt	1970	15,500	Good