US Bridges

Ill 1 over Little Beaver Creek

Poor

Iroquois County, Illinois · 1.2 N Papineau RD · Structure no. 038001700000000

Built
1918
107 years old, rebuilt 1955
Condition
Poor
inspected December 2024
Type
Slab
Concrete Continuous
Length
63 ft
2 main spans
Daily traffic
2,000
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 1 over Little Beaver Creek is a concrete continuous slab carrying Ill 1 over Little Beaver Creek in Iroquois County, Illinois. It was built in 1918 and reconstructed in 1955, so it is 107 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,000 vehicles a day, roughly 12% of them trucks, projected to reach 1,919 by 2046. The structure is 63 ft (19.1 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIll 1
CrossesLittle Beaver Creek
Location1.2 N Papineau RD
RouteState Highway 1
Coordinates40.98732, -87.7322
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length63 ft (19.1 m)
Longest span31 ft (9.4 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2023)
Projected traffic1,919 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 1 over Little Beaver Creek built?

It was built in 1918, making it 107 years old in 2025. It was reconstructed in 1955.

What condition is Ill 1 over Little Beaver Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does Ill 1 over Little Beaver Creek carry?

About 2,000 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Ill 1 over Little Beaver Creek?

The structure is 63 ft (19.1 m) long with a longest span of 31 ft (9.4 m) and a deck 34 ft wide.

Who owns Ill 1 over Little Beaver Creek?

It is owned by the State Highway Agency.