US Bridges

Il 155 over Stream

Fair

Randolph County, Illinois · In Prairie Du Rocher · Structure no. 079003200000000

Built
1957
68 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
31 ft
1 main span
Daily traffic
1,050
2023 count
Owner
State
State Highway Agency

About this bridge

Il 155 over Stream is a concrete slab carrying Il 155 over Stream in Randolph County, Illinois. It was built in 1957, so it is 68 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,050 vehicles a day, roughly 8% of them trucks, projected to reach 1,111 by 2046. The structure is 31 ft (9.4 m) long and 40 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesIl 155
CrossesStream
LocationIn Prairie Du Rocher
RouteState Highway 155
CountyRandolph County
StateIllinois
Coordinates38.08818, -90.09716
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span29 ft (8.7 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2023)
Projected traffic1,111 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

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 Il 155 over Stream built?

It was built in 1957, making it 68 years old in 2025.

What condition is Il 155 over Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does Il 155 over Stream carry?

About 1,050 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Il 155 over Stream?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.7 m) and a deck 40 ft wide.

Who owns Il 155 over Stream?

It is owned by the State Highway Agency.