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Blaine Rd over Branch Beaver Creek

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

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

Blaine Rd over Branch Beaver Creek in Boone County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 50 vehicles a day (traffic count year 2018).
Its listed owner is a town or township highway agency.
It is one of 45 of the 109 inventoried bridges in Boone County rated good (41.3%); 11 (10.1%) are rated poor.
Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
Its condition class and component ratings are unchanged from the 2024 inventory.
Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
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

Component	Rating (2024)	Rating (2025)	FHWA scale meaning
Culvert	7	7	Good condition


Structure	Steel culvert
Length	about 33 ft
Location	3.0 Mi N Capron
NBI structure number	004306000000000
Condition class	Good
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	July 2023
Inspection interval (item 91)	24 months
Scour (item 113)	8: foundations stable, scour above the top of the footing

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

Bridge	Built	Vehicles/day	Condition
I 90 over Stream	2014	51,100	Fair
I-90 over Stream	1958	28,000	Good
I 90 WB over Mosquito Crk	2013	28,000	Fair
I 90 EB over Mosquito Ckr	2013	28,000	Good
I-90 over Stream	1958	25,700	Fair
I-90 over Stream	1958	25,550	Good