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Tr 55B over Martinton Ditch No 3

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

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

Tr 55B over Martinton Ditch No 3 in Iroquois County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1981, making it 44 years old at the 2025 inventory.
It carries about 150 vehicles a day (traffic count year 2022).
Its listed owner is a town or township highway agency.
It is one of 227 of the 568 inventoried bridges in Iroquois County rated fair (40.0%); 83 (14.6%) 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 65 ft
Location	0.1 Mi E Martinton
NBI structure number	038454800000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-57 over Dranage Ditch	2015	18,100	Fair
I-57 over Dranage Ditch	2015	18,100	Fair
I-57 NB & SB over Prairie Creek	2015	18,100	Fair
Fai-57 over Stream	1971	17,600	Fair
I-57 SB over Langan Creek	2013	9,550	Fair
Fai-57 NB over Langan Creek	2014	9,550	Fair