US Bridges

Ill 26 over Green River Overflow

Good

Lee County, Illinois · 2.6 MI S Amboy RD · Structure no. 052200100000000

Built
1981
44 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
29 ft
3 main spans
Daily traffic
1,500
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 26 over Green River Overflow is a concrete culvert carrying Ill 26 over Green River Overflow in Lee County, Illinois. It was built in 1981, so it is 44 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,500 vehicles a day, roughly 23% of them trucks, projected to reach 1,566 by 2046. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 37.3 mi (60 km).

CarriesIll 26
CrossesGreen River Overflow
Location2.6 MI S Amboy RD
RouteState Highway 26
Coordinates41.66942, -89.45939
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span10 ft (2.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic1,566 by 2046
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 26 over Green River Overflow built?

It was built in 1981, making it 44 years old in 2025.

What condition is Ill 26 over Green River Overflow in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does Ill 26 over Green River Overflow carry?

About 1,500 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is Ill 26 over Green River Overflow?

The structure is 29 ft (8.8 m) long with a longest span of 10 ft (2.9 m).

Who owns Ill 26 over Green River Overflow?

It is owned by the State Highway Agency.