US Bridges

I-39 & US 51 over Stream

Good

Ogle County, Illinois · 1.25 MI N of Il 64 · Structure no. 071201100000000

Built
1981
44 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
34 ft
2 main spans
Daily traffic
32,200
2023 count
Owner
State
State Highway Agency

About this bridge

I-39 & US 51 over Stream is a concrete culvert carrying I-39 & US 51 over Stream in Ogle 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 32,200 vehicles a day, roughly 32% of them trucks, projected to reach 29,432 by 2046. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-39 & US 51
CrossesStream
Location1.25 MI N of Il 64
RouteInterstate 39
CountyOgle County
StateIllinois
Coordinates42.02673, -89.02076
Functional classRural Principal Arterial - Interstate

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 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 rating63.6 US tons
Inventory rating37.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length34 ft (10.4 m)
Longest span17 ft (5.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,200 (2023)
Projected traffic29,432 by 2046
Trucks32%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-39 & US 51 over Stream built?

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

What condition is I-39 & US 51 over Stream 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 November 2023.

How much traffic does I-39 & US 51 over Stream carry?

About 32,200 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is I-39 & US 51 over Stream?

The structure is 34 ft (10.4 m) long with a longest span of 17 ft (5.1 m).

Who owns I-39 & US 51 over Stream?

It is owned by the State Highway Agency.