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US 136 over Miss R/1ST/KEOKUK Jct RR

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

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

US 136 over Miss R/1ST/KEOKUK Jct RR in Hancock 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 1985, making it 40 years old at the 2025 inventory.
It carries about 10,500 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 105 of the 290 inventoried bridges in Hancock County rated fair (36.2%); 63 (21.7%) 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	Continuous steel stringer or multi-beam girder
Length	about 3,345 ft
Location	Hamiltn Il-keokuk Ia
NBI structure number	034006200000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 136 over Hamilton Slough	1954	10,500	Good
Il 336 over Trib to Praire CR	2006	4,200	Good
Il 94 (NB) over Slater Creek	2003	4,050	Fair
Il 94 (SB) over Slater Creek	2002	4,050	Fair
US 136 over Il 336	2006	4,000	Good
US 136 WB over Prairie Creek	2007	4,000	Good